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Agilent Technologies 63539-1, Operation Manual

Introducing the Agilent Technologies 63539-1 - your go-to solution for accurate measurements. Enhance your understanding with the comprehensive Operation Manual, available for free download at manualshive.com. This essential manual provides in-depth instructions and troubleshooting tips, ensuring seamless utilization of this state-of-the-art technology.

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Chapter 5

 

Measurement Definition

Measurement Parameter Definition

Figure 5-14 

Pinned Layer Reversal with Symmetrical TAA

Equation 5-14 

Condition for Pinned Layer Reversal with Symmetrical TAA

The pinned layer is reversed when the output pulse becomes opposite to the direction of the 
media’s magnetization. From the illustration above if the output pulse of  is 
smaller than  and assuming that triTAA- is the same as isoTAA-, then the pinned 
layer is reversed satisfying the condition above.

triTAA +

isoTAA +

----------------------------

triTAA Ð

isoTAA Ð

-----------------------------

<

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Summary of Contents for 63539-1

Page 1: ... underutilized and idle equipment along with credit for buybacks and trade ins Custom engineering so your equipment works exactly as you specify Critical and expedited services Leasing Rentals Demos In stock Ready to ship TAR certified secure asset solutions Expert team I Trust guarantee I 100 satisfaction All trademarks brand names and brands appearing herein are the property of their respective ...

Page 2: ...ration Manual 27th Edition Software Revision This manual applies directly to system which has the software revision B 04 00 Part No E5023 90090 January 2004 Printed in Japan Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 3: ...r written consent of the Agilent Technologies Inc Agilent Technologies Japan Ltd Component Test PGU Kobe 1 3 2 Murotani Nishi Ku Kobe shi Hyogo 651 2241 Japan Microsoft is a registered trademark of Microsoft Corporation Windows 95 2000 and Visual Basic are registered trademarks of Microsoft Corporation Acrobat Reader is a registered trademark of Adobe Corporation Agilent Technologies Japan Ltd 199...

Page 4: ...dition February 2000 9th Edition April 2000 10th Edition June 2000 11th Edition July 2000 12th Edition July 2000 13th Edition October 2000 14th Edition November 2000 15th Edition December 2000 16th Edition March 2001 17th Edition June 2001 18th Edition August 2001 19th Edition August 2001 20th Edition October 2001 21st Edition February 2002 22nd Edition part number E5023 90040 July 2002 23rd Editi...

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Page 6: ...adjustments must be made by qualified maintenance personnel Do not replace components with the power cable connected Under certain conditions dangerous voltages may exist even with the power cable removed To avoid injuries always disconnect power and discharge circuits before touching them DO NOT Service Or Adjust Alone Do not attempt internal service or adjustment unless another person capable of...

Page 7: ...your fingers in shroud while the spindle is running The furnished shroud does not provide protection from glass shards which can cause death or serious injury To prevent injury to the operating personnel use a safety cover when you use glass media Contact Agilent Technologies when you design a safety cover Caution Strong magnetic fields exist in the X Y stage drive motors Keep magnetic devices awa...

Page 8: ...essential to highlight Certification Agilent Technologies Inc certifies that the module and the spectrum analyzer and the oscilloscope met its published specifications at the time of shipment from the factory Agilent Technologies further certifies that their calibration measurements are traceable to the United States National Institute of Standards and Technology to the extent allowed by the Insti...

Page 9: ...r any assistance contact your nearest Agilent Technologies Sales and Service Office Addresses are provided at the back of this manual Typeface Conventions Bold Boldface type is used when a term is defined For example icons are symbols Italic Italic type is used for emphasis and for titles of manuals and other publications Sample Program A sample program is installed in the PC The sample program li...

Page 10: ... not be liable for any infringement of any patent trademark copyright or other proprietary rights by the SAMPLE PROGRAMS or their use Agilent Technologies does not warrant that the SAMPLE PROGRAMS are free from infringements of such rights of third parties However Agilent Technologies will not knowingly infringe or deliver software that infringes the patent trademark copyright or other proprietary...

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Page 12: ...it on the rear panel of the spinstand cover 38 Switch on the spinstand 38 Switch on the PC and its monitor 38 Setting the Media 39 Initialize the System 40 Setting the HGA Cassette 40 Measurement 42 Closing the System 42 Switch off the System 42 Shutting down the PC 42 3 VEE Measurement Program Operation Introduction 44 Starting the VEE measurement program 46 HGA Cassette Parameter Configuration 4...

Page 13: ...ic Noise Ratio SHNR 145 Dipulse Extraction NLTS 149 Time Correlation NLTS 150 5th Harmonic NLTS 151 SNR Measurement 153 Spectral SNR Measurement 155 Spectrum Measurement 157 Popcorn Noise Test 160 Bit Error Test Measurement 166 DCR Measurement 191 Overwrite Measurement 192 Sectored Overwrite Measurement 194 Partial Erasure Measurement 196 Side Reading Measurement 198 Side Erase Measurement 200 Tra...

Page 14: ...nt 289 Write Current Sweep Measurement 290 Sense Current Sweep Measurement 291 Channel Bit Rate Sweep Measurement 291 Roll off Measurement 291 Precompensation Sweep Measurement 292 Standard Triple Track Test 293 SNR Triple Track Test 297 Baseline Popping 303 Other Measurement Definitions 304 Overwrite Measurement 304 Partial Erasure Measurement 305 Data Pattern 307 Write Precompensation 307 Input ...

Page 15: ...in Revision B 02 00 from Revision B 01 10 346 Changes in Revision B 01 10 from Revision B 01 00 02 347 Service Release for Revision B 01 00 348 Changes at Revision B 01 00 02 348 Changes at Revision B 01 00 01 348 Changes in Revision B 01 00 from Revision A 04 30 03 349 Service Release for Revision A 04 30 350 Changes at Revision A 04 30 07 350 Changes at Revision A 04 30 06 350 Changes at Revisio...

Page 16: ...tion file for software Rev3 30 and later revisions 373 When downgrading Rev3 30 to software Rev3 21 and earlier revisions 374 Changes in Revision A 03 2x from Revision A 03 10 375 Changes at Revision A 03 10 from Revision A 03 00 376 Changes at Revision A 03 00 from Revision A 02 1x 377 Changes at Revision A 02 1x from Revision A 02 0x 378 B Error Messages Error Messages on PC Monitor Display 380 ...

Page 17: ...he Pads Condition 427 Connection Pad Replacement 428 H Ramp Load Ramp Load 432 Overview 433 Ramp Loading Mechanism Installation 433 Ramp and HGA Cassette for Ramp Load Preparation 434 Head Loading Aux Controller Setting 435 Ramp Cylinder Installation 436 Ramp Load Position and Media Load Position Determining 437 Measurement with Ramp Load 437 Ramp Loading Mechanism Maintenance 440 Ramp Load Positi...

Page 18: ...17 Introduction 2 Chapter Title 3 Chapter Title 4 Chapter Title 5 Chapter Title 1 Introduction Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 19: ... the user to create his own program This contains sample programs in Visual Basic and function references UDS Programming Manual This manual provides the information to allow the user to create his own program using User Defined Sequence UDS An individual test sequence such as write offset erase write etc has been provided as a call function to allow the user to create his own measurement sequence...

Page 20: ...stalled in PDF format inside the PC By selecting the desired manual from the start menu of Windows 95 2000 Program Agilent Hard Disk ReadWrite Test System the Acrobat Reader will automatically start up displaying the manual on the screen You can also download these documents from our website http dst tm agilent com Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artis...

Page 21: ...f parameters that are used for other measurements Chapter 5 Specifications This chapter covers the performance characteristics and specifications of the Agilent Technologies E5022 E5023 Appendix A Manual Changes This appendix provides the information required to adapt this manual to earlier versions or configurations of the Agilent Technologies E5022 E5023 to the current printing data of this manu...

Page 22: ... the system components If rack option is not ordered the rack will not be provided Measuring Instrument Portion The heart of the system is a set of C size VXI modules which are designed for E5022 E5023 Some of them are provided as options The measuring instruments that are installed in the VXI mainframe are as follows Agilent E8491A IEEE 1394 PC Link to VXI Module Agilent E5035A 1 Spinstand I F Mo...

Page 23: ...036A E5036A Parametric Module E5038A E5038A E5038B Spectrum Measurement Module E5040A E5040A E5040A Bit Error Test Module Optional E5039A E5039A E5039B or E5039C Dual Counter Module Optional E5041A E5041A E5041A Oscilloscope Optional 54845A 54845A 54845A Spinstand E5010B E5011A E5010C or E5013A E5010B E5011A E5010C or E5013A E5010C or E5013A 1 It must be used with the E5043A Head Amplifier Control...

Page 24: ...work and GPIB cards Display 17 inch CRT type HeadAmplifier E5029H Conventional E5029J AOC E5029H Conventional E5029J AOC E5029K AOC E5029K AOC Cassette E5029C Conventional E5029D AOC E5029C Conventional E5029D AOC E5029E AOC E5029E AOC 1 Obsolete Table 1 2 E5022 E5023 Components Matrix Spinstand Dependent Module E5010B E5011A E5010C E5013A Spinstand Type E5010B E5011A E5010C E5013A HA Cassette Typ...

Page 25: ...5010B E5011A E5010C E5013A the split axis style spinstand is used as a spinstand of E5022 E5023 The 3 5 and 2 5 inch spindle clamps chuck are available as a option Figure 1 2 shows the name of each part of spinstand Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 26: ...ct Overview Introduction 2 Chapter Title 3 Chapter Title 4 Chapter Title 5 Chapter Title Figure 1 2 Name of each part of the E5010B Spinstand Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 27: ...verview Figure 1 3 Name of each part of the E5010C Spinstand with Spinstand Cover Option Figure 1 4 E5029K On Stage Buffer Unit Connection Board Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 28: ...en you power on the spinstand Do Not stick your fingers near the HLM Spindle Stage in the following precautionary points The HLM Spindle stage is equipped with a terminal guide When the stage is moving DO NOT put your fingers in between the HLM Spindle stage and the guide terminal rubber bushing Figure 1 5 Precautionary points HLM Spindle Stage guide terminal Artisan Technology Group Quality Instr...

Page 29: ...en the HLM and Spindle stage as shown below When the HLM moves toward the spinstand DO NOT put your fingers along this line as shown in the figure below Figure 1 6 HLM Spindle stage Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 30: ... Cover While the spindle is running DO NOT stick your fingers in the shroud The spindle will not rotate if the shroud is open This is designed to provide safety during work therefore DO NOT remove the shroud Emergency Switch In the event of an emergency push the emergency switch button red button on the front panel of the spinstand this will immediately stop the spindle rotation and HLM Spindle st...

Page 31: ...amount of write current to the media When reading the data as specified by the amount of read current the read data is amplified by the head amplifier and inputted into the Filter Matrix Module The Filter Matrix Module filters out the signal before distributing it to each measuring instrument The Filter Matrix Module is equipped with replaceable four filters The user can set any of the four filter...

Page 32: ...al axis is caused to float rotation is made by the motor Clamp the head before rotation and un clamp the head when it is stopped Also the spindle is equipped with a shroud as a means of protection If the lid cover of the shroud is open the spindle will not rotate Spinstand Controller The spinstand controller is a component of the spinstand that controls every movement of the spinstand except the H...

Page 33: ...into three parts Measurement Library VEE Measurement Program and Sample Program The latest system software can be downloaded from the website http dst tm agilent com E5022 E5023 Measurement Library E5022 E5023 Measurement Library is a dynamic link library designed to facilitate measurement programming This creates an environment that makes the E5022A B into an integrated system rather than a rack ...

Page 34: ... used to control the instrument This includes Agilent VISA library It is not necessary to care about this library because the Agilent E5022 E5023 measurement library controls this I O Library is installed in the PC and the VXI modules E8491 They have their own revisions and they must be the same in one system When you replace the E8491 in the VXI Mainframe the I O library must be installed again i...

Page 35: ...34 Chapter1 Introduction System Structure Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 36: ...Chapter Title Measurement 3 Chapter Title 4 Chapter Title 5 Chapter Title Preparation 2 Preparation for Measurement Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 37: ...1 Basic Procedure First turn on the spinstand system second turn on the electronics system then attach the head cassette on the HLM You can also attach the head cassette and media before you turn on the power supply Then proceed to measurement Turn off the power after measurement Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 38: ...m Step 1 Check the air pressure of the spinstand Step 2 Check the vacuum pressure of the spinstand Step 3 Switch on the spinstand Step 4 Switch on the VXI mainframe and other measuring instruments Step 5 Switch on the PC and its monitor Figure 2 2 Front Panel of the Spinstand Check the air pressure and the vacuum pressure of the spinstand Make sure that the air pressure gauge and the vacuum pressu...

Page 39: ...ormal is displayed on the LCD panel IMPORTANT The spinstand is equipped with an Emergency Switch button located on the front panel In the event of an emergency push the emergency switch button red button on the front panel of the spinstand this will immediately stop the spindle rotation and HLM Spindle stage movement To reset this switch slowly turn it clockwise until it pops up Switch on the PC a...

Page 40: ...will not rotate Listed below are the procedures to follow when setting the media Step 1 Loosen 2 screws mounted on top of shroud s lid cover Step 2 Lift the lid cover slightly and slide it outwards Step 3 Set the media on the spindle Step 4 Replace the lid cover Step 5 Screw the two screws of the lid cover Figure 2 3 Opening the shroud s lid cover At the center of the shroud is a pole it is used t...

Page 41: ...contacts the shroud Setting the HGA Cassette Set the head cassette on the HLM Head Loading Mechanism Cassette attachment is basically the same for all types of cassettes Push the cassette knob inwards to widen its claw then insert the head cassette on top of the HLM Release the cassette knob and check if it is locked down on the HLM The cassette face i e up face down face is automatically detected...

Page 42: ...g the HGA Cassette 1 Chapter Title Measurement 3 Chapter Title 4 Chapter Title 5 Chapter Title Preparation Figure 2 5 Setting the Cassette on the HLM E5010C Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 43: ...urement program exit the program Switch off the System After executing the measurement program check if the spinstand stopped from rotating Switch off the power of each instrument in the following order 1 Switch off the VXI mainframe and other measuring instruments 2 Switch off the spinstand 3 Switch off the PC and its monitor Turn off the air compressor and vacuum air AFTER switching off all powe...

Page 44: ...ter Title 3 VEE Measurement Program Operation This chapter provides the information on how to make measurements on the Agilent E5022 E5023 using the furnished Measurement program Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 45: ...ftware which allows the user to make quick measurements and display the system settings Figure 3 1 Flowchart of VEE measurement program 1 Starting the VEE measurement program This section explains how to start the VEE measurement program 2 Setting the cassette parameters Before proceeding to measurement the user must specify the size and type of cassette being used 3 Setting configurations This se...

Page 46: ...e parameter setting for each measurement 6 Exit the VEE measurement program This section shows how to end the program Measurement settings can also be executed using DLL function of Agilent E5022 E5023 Refer to the programming manual for the DLL s detailed descriptions NOTE Proper values for each parameter described in this chapter must be used Each parameter value depends on individual head chara...

Page 47: ...lected a file menu will pop up that will allow you to load the parameters stored in a text file When Starts with the default setting is selected measurement will start at default setting NOTE If you install a new kind of module or box instrument into the system you must select Starts with the default setting at first time execution Otherwise VEE measurement program does not recognize the module Th...

Page 48: ... point must be specified This becomes the track s center point The second purpose is to let the system know the HGA and cassette size so as to prevent the head from bumping into the shroud Size of cassettes varies with each Agilent part number NOTE If the Agilent part number is not registered on the system s software an error hpe5022_ERROR_NSUP_HGA_ CASSETTE will appear on the display The software...

Page 49: ...can load the cassette parameters automatically using the Load Parameter button When you use a customer designed cassette see the next section NOTE When the FIC length of cassette is adjustable such as E5029C Option C11 the letters s short length m medium length and l long length is added as subscript to the cassette s part number e g E5010 61145s E5010 61145m or E5010 61145l Refer to Option C11 on...

Page 50: ...origin The x and y coordinates of the HGA boss center is defined as the position From the x and y coordinates two or three location points must be specified in order to let the system know the shape of the cassette The user can specify certain points outside the cassette As shown in Figure 3 5 the outer area covered by the lines connecting Points 1 2 and 3 form what is called as the permission are...

Page 51: ...cation of an arbitrary point in theouter area This is optional If not specified x and y is set to zero i e default Distance between boss center and cassette guide pin Specifies the location of HGA boss center Xb and Yb in Figure 3 5 See also the hpe5022_hgaCassetteDimension in the programming manual 3 Click the Set button to set the specified parameters 4 Click the Close button to return to main m...

Page 52: ...E5022 E5023 revision shows the major revision number The revision number of service releases are not shown at this When you confirm if a service release software is installed click start Programs Agilent Hard Disk ReadWrite Test System Readme on the windows 95 2000 Figure 3 7 About E5022 E5023 NOTE The E5036A module VXIO 6 INSTR and E5041A module VXIO 11 INSTR will not report any module revision b...

Page 53: ...precompensation head amplifier input range filter data pattern and narrow band TAA frequency for advance measurements 1 Displays the Main Menu Figure 3 8 Main Menu 2 Click on the Configuration button to open the configuration menu Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 54: ... Chapter Title Figure 3 9 Configuration Menu 3 Click on Setup button to open the setup menu Figure 3 10 Setup Menu 4 Set the parameters within the limits of measurement Channel Bit Rate Specifies the speed at which data bits are Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 55: ...f during a write sequence You can set at the reverse and or off modes only if the installed head amplifier has the capability to select Erase Type Specifies the erase type either DC erase or AC erase Erase Current Specifies the amount of current to erase AC Erase Frequency Specifies frequency for an AC erase Data Pattern Specifies the data pattern to be written on the test track To set the data pa...

Page 56: ...2 E5023 system can not guarantee a track offset of 6µm this could result to an error hpe5022_ERROR_INV_PARAMETER When the skew angle is set below 30 degrees the user may need to uncheck the Measure R W offset parameter or set the range of the background track offset to a value lower than 6µm to avoid generating an error Refer to hpe5022_headPosition function of the programming manual for details N...

Page 57: ...ration Setup Filter Config to open the Filter menu Figure 3 11 Filter Menu 2 Click on Filter and select the type of filter to be used by the Filter Matrix Module 3 Click the Return button to return to setup menu Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 58: ...efault setting can be used for unwanted patterns Binary pattern is used for user defined pattern Use Load User Pattern to down load the file that contains user defined data pattern into the User Define parameter The format of this file should be in text form example FileName txt Also a maximum of only 256 numerical strings can be set with this parameter If it goes over 256 numerical strings you wo...

Page 59: ... Band TAA Overwrite and Narrow Band Track Profile etc NOTE The amplitude calibration must be performed after at least 30 minutes warming up of the system Followings are the procedures for the amplitude calibration of E4402B Spectrum Analyzer 1 Run the VEE Test Environment Software after the warming up the system On the Main Menu display click on Configuration to open the Configuration menu Figure ...

Page 60: ...Title 2 Chapter Title Measurement 4 Chapter Title 5 Chapter Title Figure 3 14 3 Replace the cable and adapter on E4402B as advised on the display and then Click on OK Figure 3 15 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 61: ...s advised on the display and then Click on OK to finish the amplitude calibration NOTE It is recommended to do the calibration in case of the followings a Temperature has changed more than 5 deg C after the previous calibration b 24 hours or more has past after the previous calibration Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 62: ...o Configuration See also the Input Range Control Auto Configuration on page 308 NOTE Repeat the Auto Configuration when any of the following events occur when the output signal has changed significantly when you set the write and sense currents at relatively high value 1 Click Measure to open the Main menu Figure 3 17 VEE measurement program Main Menu 2 Check if the head and media are already inst...

Page 63: ...en the Auto Config menu Figure 3 19 Auto Configuration Menu 5 Set the write and sense currents according to test requirements The new setting will automatically update similar parameters in other menus 6 Click on the Setting to open the autoconfig setting menu Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 64: ...f the band erase and the track profile measurement since the auto config performs a track profile measurement in the sequence 8 Click Measure to start measurement 9 The results of TAA and PW length for a Reference Isolated Pulse Pattern will be displayed The displayed values will automatically be reflected in the Input Range Menu Artisan Technology Group Quality Instrumentation Guaranteed 888 88 S...

Page 65: ...nfiguration Figure 3 21 Auto Config Result 10 Click on the Return button to return to Measure menu See also See Input Range Control Auto Configuration on page 308 for the auto configuration Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 66: ...so done automatically When replacing the head the head must be at home position and the spindle should not be rotating Click the Return button of the Measure menu then click on Configuration so that the head is unloaded If you use a different type of head or cassette Click Spinstand Cassette Parameter button to enter the dimensions of the new cassette Figure 3 22 Measure Menu NOTE When your system...

Page 67: ...to Configuration to set the input range automatically 2 Set the parameters click on each button to enter a new value Channel Bit Rate Specifies the speed at which data bits are written on the media per second bps Write Current Specifies the current applied to the write head Sense Current Specifies the current applied to the read head Data Pattern Specifies the data pattern to be written on the tes...

Page 68: ... TAA Asymmetry are averaged from the number of measured revolutions set by the Average Mod Ratio Mod Ratio Pos and Mod Ratio Neg are modulation result The test result only for the last revolution of TAA measurement is used to calculate the modulation The TAA data at each revolution are displayed on the graph When you click the TAA Trace and TAA Asym Trace buttons for more detailed information of t...

Page 69: ...ent Display The upper portion of the window shows the mean minimum maximum and standard deviation of TAA Asymmetry from the number of measured revolutions 7 Click OK to return to TAA menu 8 Click on the Raw Data Trace button to display the results of Raw Data Figure 3 26 Raw Data Display Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 70: ...ays the measurement results for every 5 µsec of each track If Average is set to 2 then only the results of the last rotation will be displayed The upper portion of the graph shows the mean maximum minimum and std deviation of the raw data The graph on the other hand shows the measured TAA TAA and TAA of the raw data for every 5 µsec 9 Click OK to return to TAA menu 10 Click on the Return button to...

Page 71: ...ange or execute the Auto Configuration to set the input range automatically 2 Set the parameters click on each button to enter a new value Channel Bit Rate Specifies the speed at which data bits are written on the media per second bps Write Current Specifies the current applied to the write head Sense Current Specifies the current applied to the read head Data Pattern Specifies the data pattern to...

Page 72: ...measure only NOTE The parameter values of Channel Bit Rate Write Current and Sense Current that have been set in the Configuration menu will automatically update similar parameters in this menu 3 Click the Measure button to start measurement When Auto Scale is pressed the graph scale will adjust itself automatically to its maximum and minimum values 4 Click the Return button to return to Measure m...

Page 73: ... input range or execute the Auto Configuration to set the input range automatically 2 Set the parameters click on each button to enter a new value Channel Bit Rate Specifies the speed at which data bits are written on the media per second bps Write Current Specifies the current applied to the write head Sense Current Specifies the current applied to the read head Data Pattern Specifies the data pa...

Page 74: ...Auto Scale is pressed the graph scale will adjust itself automatically to its maximum and minimum values Measurement Display The upper portion of the window shows the Baseline Baseline Baseline and Baseline Separation The graph on the other hand displays the results for each revolution 4 Click the Histogram button to open the Histogram Data Window Figure 3 29 Histogram Data Window Measurement Disp...

Page 75: ...HF TAA and LF TAA for Resolution computation Resolution Measurement Procedure 1 To open the Parametric menu click on Parametric from the Parametric frame of the Measure menu Figure 3 30 Parametric Menu NOTE Before you execute this measurement you should set an appropriate input range or execute the Auto Configuration to set the input range automatically 2 Set the parameters click on each button to...

Page 76: ...e Current that have been set in the Configuration menu will automatically update similar parameters in this menu 3 Click the Measure button to start measurement Results are displayed according to the overview explanation Measurement Display The upper portion of the window shows the results of the HF TAA LF TAA Isolated TAA PW and Resolution 4 Click the Return button to return to Measure menu See A...

Page 77: ...t the input range automatically 2 Set the parameters click on each button to enter a new value Channel Bit Rate Specifies the speed at which data bits are written read on the media per second bps Write Current Specifies the current applied to the write head Sense Current Specifies the current applied to the read head HF Specifies the number of repetitive periods for HF data pattern LF Specifies th...

Page 78: ...his menu 3 Click on the Measure button to start measurement results are displayed after measurement Measurement Display The upper portion of the window shows the mean minimum maximum and standard deviation While the graph displays the resolution trace for every revolution 4 Click the Return button to return to Measure Menu Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE w...

Page 79: ...rement on page 248 1 To open the Stability Ratio Setting menu click on the Stability Stability Ratio Setting button from the measurement menu Figure 3 32 Stability Menu TAA Measures the stability of TAA PW Measures the stability of PW Narrow Band TAA Measures the stability of the Narrow Band TAA 2 Click on the TAA button to open the TAA Stability menu Artisan Technology Group Quality Instrumentati...

Page 80: ...rrent applied to the read head Data Pattern Specifies the data pattern to be selected for measurement To set the data pattern click on the Configuration Setup Pattern Config buttons to open the data pattern menu of Rev Specifies the number of revolutions of measurement of Segments Specifies the number segments or track divisions Segment Specifies the segment number by which to get the results The ...

Page 81: ...measurement The other measurements use the setting of Sense Curr Mode under the setup menu for the current polarity See Figure 3 10 on page 53 4 Click on the Write Config button to set the stimulus write pattern of the stability measurement In order to effectively use the write mode continuous you must set the repetitive period of the selected data pattern to 1T 2T 4T and or 8T in the Pattern Conf...

Page 82: ... same for all segments When Continuous is selected the write current direction at the beginning of write operation is the same as the last current direction of the previous write Refer to the programming manual for details 5 Click on the Measure button to start measurement Results are displayed after measurement Measurement Display The menu shows the measurement results of TAA TAA and TAA from the...

Page 83: ... the media per second bps Write Current Specifies the current applied to the write head Sense Current Specifies the current applied to the read head Data Pattern Specifies the data pattern to be written on the test track To set the data pattern click on the Configuration Setup Pattern Config buttons to open the data pattern menu Track Specifies the track number to be tested Write Ratio Specifies t...

Page 84: ...r Freq Specifies the measurement frequency of the spectrum analyzer Freq Mode Specifies the type of frequency mode to measure the Narrow Band TAA When Auto Mode is selected the measurement frequency is set to the fundamental frequency of the data pattern When Fixed Mode is selected measurement frequency is set to the frequency specified by the parameter Center Freq 3 Click on the Write Config butt...

Page 85: ... current direction of the previous write Refer to the programming manual for details 4 Click the Measure button to start measurement Results are displayed after measurement Measurement Display The window shows the measurement results of TAA from a specified number of revolutions of Rev The mean minimum maximum and standard deviation of the measured narrow band TAA are all displayed on the upper po...

Page 86: ...be closely correlated to popcorn noise test 1 To open the Stability Measurement Absolute Time Setting menu click on the Stability Stability Absolute Time Setting button from the Measurement Menu Figure 3 38 Stability Measurement Absolute Time Setting Menu TAA Measures the stability of TAA PW Measures the stability of PW Narrow Band TAA Measures the stability of the Narrow Band TAA 2 Click on the T...

Page 87: ... on the Configuration Setup Pattern Config buttons to open the data pattern menu of Counts Specifies the number of measurement counts where count revolution x segment Track Specifies the track number to be tested Write Time Specifies the time to write the data Minimum value is 1 µsec and maximum value is 10 msec Refer to hpe5022_measureAbsStability function of the programming manual for details De...

Page 88: ...rity is the opposite of the write current polarity Only the universal head amplifier supports the reverse and off modes 4 Click on the Write Config button to set the write excitation pattern of the stability measurement In order to effectively use the write mode continuous the user must set the repetitive period of the selected data pattern to 1T 2T 4T and or 8T in the Pattern Config menu Refer to...

Page 89: ...ion is the same as the last current direction of the previous write Refer to the programming manual for details 5 Click on the Measure button to start measurement To show the measurement results of a particular segment click on Select Segment and enter the segment number Measurement Display The menu shows the measurement results of TAA TAA and TAA from the specified number of counts of Counts The ...

Page 90: ... data bits are written on the media per second bps Write Current Specifies the current applied to the write head Sense Current Specifies the current applied to the read head Data Pattern Specifies the data pattern to be written on the test track To set the data pattern click on the Configuration Setup Pattern Config buttons to open the data pattern menu of Counts Specifies the number of measuremen...

Page 91: ...e is selected the read polarity is reversed Only the universal head amplifier supports the reverse and off functions Center Freq Specifies the measurement frequency of the spectrum analyzer Freq Mode Specifies the type of frequency mode to measure the Narrow Band TAA When Auto Mode is selected the measurement frequency is set to the fundamental frequency of the data pattern When Fixed Mode is sele...

Page 92: ...operation is the same as the last current direction of the previous write Refer to the programming manual for details 4 Click the Measure button to start measurement Results are displayed after measurement Measurement Display The window shows the measurement results of TAA from the specified number of counts of Counts The mean minimum maximum and standard deviation of the measured narrow band TAA ...

Page 93: ... Configuration to set the input range automatically 2 Set the parameters click on each button to enter a new value Channel Bit Rate Specifies the speed at which data bits are written on the media per second bps Write Current Specifies the current applied to the write head Sense Current Specifies the current applied to the read head Data Pattern Specifies the data pattern to be written on the test ...

Page 94: ...as means to perform a DC erase write data then measure 2 Write Meas means to write a data then measure 3 Meas means to measure only NOTE The parameter values of Channel Bit Rate Write Current and Sense Current that have been set in the Configuration menu will automatically update similar parameters in this menu 3 Click the Measure button to start measurement Measurement Display The upper portion o...

Page 95: ...nts the original data used to calculate the narrow Band TAA The upper portion of the graph shows the mean maximum minimum and std deviation of the raw data 5 Click the Return button to return to Measure menu Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 96: ...ue Channel Bit Rate Specifies the speed at which data bits are written on the media per second bps Write Current Specifies the current applied to the write head Sense Current Specifies the current applied to the read head Oversample Rate Specifies the sampling rate of the oscilloscope The sampling rate of the oscilloscope is specified by the channel bit rate x oversample rate Data Pattern Specifie...

Page 97: ...arameters in this menu 3 Click the Measure button to start measurement Results are displayed after measurement Measurement Display The number of waveform periods are averaged and displayed on the window The upper portion of the window shows the TAA PW and Baseline results 4 Click the Return button to return to Measure menu See also See the Waveform measurement function section in Chapter 3 of the ...

Page 98: ...on each button to enter a new value Channel Bit Rate Specifies the speed at which data bits are written on the media per second bps Write Current Specifies the current applied to the write head Sense Current Specifies the current applied to the read head Average Specifies the number of revolutions to get the average results Track Specifies the track number to be tested Isolated Pulse Specifies the...

Page 99: ...e been set in the Configuration menu will automatically update similar parameters in this menu 3 Click on the Measure button to start measurement Results are displayed after measurement Measurement Display The measurement window shows the average TAA TAA TAA and TAA Asymmetry for both Isolated Pulse and Tribit patterns It also shows the computed absolute polarity in terms of percentage 4 Click the...

Page 100: ...track profile This measurement is measured by the parametric module While narrow band track profile and the micro track profile measurements are measured by the spectrum analyzer TAA Track Profile Measurement 1 To open the Track Profile menu click on the Track Profile button from the Parameter Sweep frame of the Measure menu Figure 3 48 Track Profile Menu 2 Click on TAA button from the Track Profi...

Page 101: ...inate an overflow of TAA measurement The range automatically adjusts itself to an appropriate range when an overflow occurs See hpe5022_isolatedPulseReferenceTaaAuto of the programming manual Track Offset Compensation Checking this box will activate a track offset compensation function See Track Offset Compensation Function on page 274 Channel Bit Rate Specifies the speed at which data bits are wr...

Page 102: ...ou set this parameter with Offset Start and Offset Stop Offset Step will be computed and updated automatically Meas Type Specifies the type of measurement sequence 1 Erase Write Meas means to perform a DC band erase write data then measure 2 Write Meas means to write data then measure 3 Meas means to measure only NOTE When hpe5022_SEQ_ER_WR_M is selected in the hpe5022_measureTrackProfile function...

Page 103: ...erase Band Erase Pitch Specifies the erase pitch of band erase Figure 3 51 Parameter of Band Erase 5 Click the Track Offset Compen Config button to open the Track Offset Conpmenband window See also the Track Offset Compensation Function on page 274 for each parameters Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 104: ... Pattern Setting Auto Setting Checking this box will define a compensation pattern setting automatically Frequency Specifies a frequency of the burst patterns Offset Specifies a offset position of the burst patterns Aperture Specifies a aperture time of the burst patterns Position Specifies a burst pattern position from the track center Compensation Revolution Setting of Revolution Specifies the a...

Page 105: ... measurement data A file menu will pop up that will require the user to enter a file name e g FileName csv 7 Click the Return button to return to Track Profile menu See also 8 See Track Offset Compensation Function on page 274 and the Track Profile measurement function section in Chapter 3 of the programming manual for the parameter and detailed description NOTE Track Offset Compensation can not b...

Page 106: ...ement a micro track profile and a fast micro track profile measurements One method is to create a micro track by erasing both sides of the track step by step until a specified level of the TAA is reached When this TAA level is reached the narrowed track becomes a micro track and the read width is measured based on this micro track Measurement Procedure 1 To open the Micro Track Profile menu click ...

Page 107: ...ense Current Specifies the current applied to the read head Data Pattern Specifies the data pattern to be written on the test track To set the data pattern click on the Configuration Setup Pattern Config buttons to open the data pattern menu Track Specifies the track number to be tested Start Specifies the starting point of erase offset in building a micro track See Micro Track Profile Measurement...

Page 108: ...Band Track Profile resulting from the original track and micro track are both displayed on the window The Write Track Width is computed from the results of the Narrow Band Track whereas the Read Track Width is computed from the results of the Micro Track NOTE To observe the resulting waveform of the original track using the hpe5022_measureTrackProfile function set the sequence type as hpe5022_SEQ_...

Page 109: ...108 Chapter3 VEE Measurement Program Operation Measurement range and its detailed description Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 110: ...ter micro track profile measurement There is no TAA level monitoring during erase operation erase is performed at once which allows for faster measurement Measurement Procedure 1 To open the Fast Micro Track Profile menu click on Fast Micro Track Profile button from the Track Profile menu Figure 3 56 Track Profile Menu Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www a...

Page 111: ...ern Config buttons to open the data pattern menu Track Specifies the track number to be tested Side Erase Position Specifies the position to erase the side of the track in creating a micro track Side Erase Mode Specifies the erase method When Erase Both is selected both sides of the track will be erased When Erase Single Side is selected only one side of the track will be erased See hpe5022_measur...

Page 112: ...rase sides of the track then measure NOTE When hpe5022_SEQ_ER_WR_M is selected in the hpe5022_measureMicroTrackProfile function three track erase is performed as erase sequence however when Erase Write Meas is selected the band erase is performed in this VEE measurement program In the VEE measurement program perform the hpe5022_measureMicroTrackProfile function is done in the mode of hpe5022_SEQ_W...

Page 113: ...and Narrow Band TAA Measurement Procedure 1 To open the Write Current Sweep menu click on the Write Current Sweep button from the Parameter Sweep frame of the Measure menu Figure 3 58 Write Current Sweep Menu NOTE Before you execute this measurement you should set an appropriate input range or execute the Auto Configuration to set the input range automatically Artisan Technology Group Quality Inst...

Page 114: ...nt is incremented while measuring TAA If you set this parameter with Start and Stop NOP will be computed and updated automatically NOP Specifies the number of points in measuring TAA relative to the change in write current If you set this parameter with Start and Stop Step will be computed and updated automatically 3 Click the Return button to return to Write Current Sweep menu 4 Select the parame...

Page 115: ...ack To set the data pattern click on the Configuration Setup Pattern Config buttons to open the data pattern menu Track Specifies the track number to be tested Write Curr Start Specifies the starting point of write current Write Curr Stop Specifies the stopping point of write current Write Curr Step Specifies the step by which write current is incremented while measuring TAA If you set this menu w...

Page 116: ...t have been set in the Configuration menu will automatically update similar parameters in this menu 6 Click on the Measure button to start measurement When Auto Scale is pressed the graph scale will adjust itself automatically to its maximum and minimum values 7 Click on the TAA Trace button to open the TAA Trace window Figure 3 61 TAA Trace Window Measurement Display The window shows the results ...

Page 117: ...urn button to return to Measure menu Sense Bias Sweep Parameter Sweep Overview This section describes the sense bias sweep measurement Sense Bias Sweep measurement is used to measure the TAA PW 5th Harmonic NLTS Overwrite and Narrow Band TAA Measurement Procedure The measurement procedure is the same as the Write Current Sweep Refer to Write Curr Sweep measurement Artisan Technology Group Quality ...

Page 118: ...ocedure 1 To open the Roll Off menu click on the Roll Off button from the Parameter Sweep frame of the Measure menu Figure 3 63 Roll Off Menu NOTE Before you execute this measurement you should set an appropriate input range or execute the Auto Configuration to set the input range automatically 2 Select desired measurement from the rolloff menu 3 Set the parameters click on each button to enter a ...

Page 119: ...of the flux frequency Bit Rate Stop Specifies the stopping point of the flux frequency Bit Rate Step Specifies the step by which bit rate is incremented while measuring TAA When you specify this parameter NOP will be computed and updated automatically NOP Specifies the number points in measuring TAA relative to the change in bit rate When you specify this parameter Bit Rate Step will be computed a...

Page 120: ...measurement When Auto Scale is pressed the graph scale will adjust itself automatically to its maximum and minimum values Measurement Display The window shows the Roll Off results The upper portion of the window shows the computed flux density at PW50 NOTE Click on the Save Trace button to save the swept measurement data A file menu will pop up that will require the user to enter a file name e g F...

Page 121: ...ocedure 1 To open the Channel Bit Rate menu click on the Channel Bit Rate button from the Parameter Sweep frame of the Measure menu Figure 3 65 Channel Bit Rate Sweep Menu NOTE Before you execute this measurement you should set an appropriate input range or execute the Auto Configuration to set the input range automatically 2 Set the parameters click on each button to enter a new value Artisan Tec...

Page 122: ... incremented while measuring TAA When you specify the Step parameter together with Start and Stop parameters NOP will be computed and updated automatically NOP Specifies the number of points to measure TAA relative to the change in channel bit rate If NOP is specified together with Start and Stop parameters Step will be computed and updated automatically 4 Click the Return button to return to Chan...

Page 123: ...fies the track number to be tested Bit Rate Start Specifies the starting point of the channel bit rate Bit Rate Stop Specifies the stopping point of the channel bit rate Bit Rate Step Specifies the step by which channel bit rate is incremented while measuring PW When you set this parameter with Bit Rate Start and Bit Rate Stop NOP will be computed and updated automatically NOP Specifies the number...

Page 124: ...n the Configuration menu will automatically update similar parameters in this menu 7 Click the Measure button to start measurement When Auto Scale is pressed the graph scale will adjust itself automatically to its maximum and minimum values NOTE Click on the Save Trace button to save the swept measurement data A file menu will pop up that will require the user to enter a file name e g FileName csv...

Page 125: ...to Configuration to set the input range automatically NOTE Before you measure write precompensation sweep you must set the Precomp Pattern Select to 001 prebit from the Precomp Config menu And set the NLTS 5th parameter to ON from the Precomp Status frame of the Precomp Config menu 2 Set the parameters click on each button to enter a new value Channel Bit Rate Specifies the speed at which data bit...

Page 126: ...ll be computed and updated automatically NOP Specifies the number of points to measure NLTS When you set this parameter with Delay Start and Delay Stop Delay Step will be computed and updated automatically NOTE The parameter values of Channel Bit Rate Write Current and Sense Current that have been set in the Configuration menu will automatically update similar parameters in this menu 3 Click the M...

Page 127: ...sus TAA Measurement Procedure 1 To open the Triple Track Test menu click on the Triple Track Test button from the Parametric Sweep frame of the Measure menu Figure 3 69 Measure Menu 2 Click Triple Track Test button to open the Standard Triple Track Test menu Figure 3 70 Triple Track Test Menu 3 Set Program Read Offset and Auto TAA Range check boxes Artisan Technology Group Quality Instrumentation ...

Page 128: ... set to the read write offset RW Offs value of this measurement Auto TAA Range Specifies the TAA range to auto mode If checked it will eliminate an overflow in TAA measurement The input range automatically adjusts itself to an appropriate range when an overflow occurs See hpe5022_isolatedPulseReferenceTaa Auto of the programming manual for details 4 Set the parameters click on each button to enter...

Page 129: ...en measure the parameter 2 Write Meas means to write a data then measure 3 Meas means to measure only NOTE The parameter values of Channel Bit Rate Write Current and Sense Current that have been set in the Configuration menu will automatically update similar parameters in this menu 5 Click the Interpolation Setup button to open the Interpolation Setup menu Figure 3 72 Interpolation Setup Menu Use ...

Page 130: ...alue for interpolation Low Specifies the minimum threshold value for interpolation Figure 3 73 Best Fit Window When best fit window is used the specified window size is shifted between the threshold high and threshold low The purpose is to find the best correlation between the limits in order to plot the interpolation lines As shown in the figure above variations in plotting the interpolation line...

Page 131: ...m from the track center Offset Step Specifies the step by which the head is moved while measuring TAA in order to build the track profile By setting this parameter with Offset Start and Offset Stop Offset NOP will be computed and updated automatically Offset NOP Specifies the number of offset points By setting this parameter with Offset Start and Offset Stop Offset Step will be computed and update...

Page 132: ...ase Range Specifies the range for band erase Band Erase Pitch Specifies the erase pitch for band erase Erase pitch is the distance between the centers of two adjacent tracks Figure 3 76 Parameter of Band Erase 8 Click on Adjacent Track Config button to set the data pattern of the adjacent track Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 133: ... button to start measurement Measurement Display The upper portion of the menu shows the measurement results of the WW Write Width RW Read Width RW Read Write offset Squash Squeeze and OTRC The lower left side of the graph shows the Track Profile Squeeze and OTRC waveform OTRC is expressed in terms µm 10 Click the Return button to return to Measure menu Artisan Technology Group Quality Instrumenta...

Page 134: ...riple Track Test Parameter Setup Buttons and Check Boxes Program Read Offset check box Specifies the auto setting of the read write offset after the SNR track profile is measured If checked the write offset and read offset of the Setup menu will be changed and updated automatically and this will be used in subsequent tests The write offset is set to zero while the read offset is set to the read wr...

Page 135: ...e Meas means to perform a band erase write a specified data then measure the parameter 2 Write Meas means to write a data then measure 3 Meas means to measure only NOTE You cannot change the Function parameter It is fixed to TAA in the SNA Triple Track Test The parameter values of Channel Bit Rate Write Current and Sense Current that have been set in the Configuration menu will automatically updat...

Page 136: ...ed window size is shifted between the threshold high and threshold low The purpose is to find the best correlation between the limits in order to plot the interpolation lines As shown in the figure above variations in plotting the interpolation lines will affect the accuracy in predicting write width read width and read write offsets 7 Click Profile Setup button to open the Profile Setup menu Figu...

Page 137: ... the number of offset points By setting this parameter with Offset Start and Offset Stop Offset Step will be computed and updated automatically 8 Click Band Erase button to open the Band Erase Configuration menu Figure 3 82 Band Erase Configuration menu Band Erase Range Specifies the range for band erase Band Erase Pitch Specifies the erase pitch for band erase Erase pitch is the distance between ...

Page 138: ... 85 SNR Profile Setup Dialog Box SNR Profile Threshold Specifies the SNR profile threshold Add Noise check box Selects to add noise or not Noise Constant Ng Specifies the Gaussian noise constant Ng Noise Constant Ni Specifies the interference noise constant Ni NOTE See OTRC SNR and Squeezed SNR Calculation and OTRC Unsqueezed OTRC and Squeezed OTRC Calculation on page 299 for the definition of eac...

Page 139: ...rt measurement Figure 3 87 Measurement Execution Measurement Display The upper portion of the menu shows the measurement results of the WW Write Width RW Read Width RW Read Write offset Squash Squeeze and OTRC The lower left side of the graph shows the Track Profile Squeeze and OTRC waveform OTRC is expressed in terms µm 13 To observe the signal track profile click Signal Profile button Artisan Te...

Page 140: ...ement 4 Chapter Title 5 Chapter Title Figure 3 88 Trace Display Buttons Figure 3 89 Signal Track Profile Display 14 To observe the normalized traces click Normalized Profile button see Figure 3 88 on page 139 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 141: ...rmalized Trace Display 15 To observe the SNR traces click SNR Profile button see Figure 3 88 on page 139 Figure 3 91 SNR Trace Display 16 Click Return button to return to Measure menu Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 142: ... on page 126 4 In the SNR Triple Track 747 test menu set each parameter using the parameter setup buttons and check boxes Figure 3 92 SNR Triple Track 747 Parameter Setup Buttons and Check Boxes Squeeze Pos Start Specifies the start squeeze position Squeeze Pos Stop Specifies the stop squeeze position NOP Specifies the number of measurement points between start and stop squeeze position NOTE Refer...

Page 143: ...142 Chapter3 VEE Measurement Program Operation Measurement Figure 3 93 SNR Triple Track 747 Measurement Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 144: ...t range or execute the Auto Configuration to set the input range automatically 2 Set the parameters click on each button to enter a new value Channel Bit Rate Specifies the speed at which data bits are written on the media per second bps Write Current Specifies the current applied to the write head Data Pattern Specifies the data pattern to be written on the test track To set the data pattern clic...

Page 145: ...r Stop Sense Curr Step will be computed and updated automatically Center Freq Specifies the measurement frequency for baseline popping test NOTE The parameter values of Channel Bit Rate Write Current and Sense Current that have been set in the Configuration menu will automatically update similar parameters in this menu 3 Click on the Measure button to start measurement Measurement Display The left...

Page 146: ...iate input range or execute the Auto Configuration to set the input range automatically 2 Set the parameters click on each button to enter a new value Channel Bit Rate Specifies the speed at which data bits are written on the media in bits per second bps Write Current Specifies the current applied to the write head Data Pattern Specifies the data pattern to be written on the test track To set the ...

Page 147: ...d Time Specifies the amount of time to read the data This parameter is expressed in msec NOTE The parameter values of Channel Bit Rate Write Current and Sense Current that have been set in the Configuration menu will automatically update similar parameters in this menu 3 Click on Sweep Config to set the sense current and off track position parameters Figure 3 96 Sweep Configuration Menu Sense Curr...

Page 148: ...tarting point of the off track position in measuring SHNR Off track Stop Specifies the stopping point of the off track position in measuring SHNR Off track Step Specifies the step by which the head is moved in measuring SHNR When you set this parameter Off track NOP will be computed and updated automatically Off track NOP Specifies the number of measurement points When you set this parameter Off t...

Page 149: ...asure button to start measurement Measurement Display The upper left portion of the window shows the calculated results of Max SHNR Sub Harmonic and Noise The plotted graph displays the raw data of the SHNR for a particular value of Sense Current selected from Select Trace Select Trace Selects the sense current whose raw data is to be plotted on the graph When you click this parameter a list box w...

Page 150: ...t you should set an appropriate input range or execute the Auto Configuration to set the input range automatically 2 Set the parameters click on each button to enter a new value Channel Bit Rate Specifies the speed at which data bits are written on the media per second bps Write Current Specifies the current applied to the write head Sense Current Specifies the current applied to the read head Ove...

Page 151: ...See NLTS Measurement on page 259 for AC SNR NOTE To observe the resulting waveform of the Averaged Waveform use the hpe5022_waveAverageData_Q function To observe the resulting waveform of the Dipulse Extraction use hpe5022_waveDipulseExtraction_Q function The results of NLTS HETS 2nd Adj and Echo are returned by the hpe5022_waveDipuseExtractionNlts_Q function using their echo locations Time Correl...

Page 152: ...ia per second bps Sense Current Specifies the current applied to the read head Track Specifies the track number to be tested Average Specifies the number of revolutions for measurement to be averaged See the hpe5022_wave Average function in the programming manual NOTE The parameter values of Channel Bit Rate Write Current and Sense Current that have been set in the Configuration menu will automati...

Page 153: ...TS 5th max and Std Dev See also See the NLTS 5th Harmonic measurement function section in Chapter 3 of the programming manual for the parameter range and its detailed descriptions Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 154: ...tion to set the input range automatically 2 Set the parameters click on each button to enter a new value Channel Bit Rate Specifies the speed at which data bits are written on the media per second bps Noise Reference Specifies the reference level to measure noise Input the estimated noise level Write Current Specifies the current applied to the write head Sense Current Specifies the current applie...

Page 155: ... start measurement 4 Click the Return button to return to Measure menu Measurement Display The mean minimum maximum and standard deviation of the SNR and Crest Factor are displayed on the upper portion of the menu The lower portion of the menu plots the measured SNR and Crest Factor The upper right side of the menu shows the measured signal and noise which are measured in terms of volt peak to pea...

Page 156: ...input range or execute the Auto Configuration to set the input range automatically 2 Set the parameters click on each button to enter a new value RBW Specifies the resolution band width Narrowing RBW will widen the dynamic range However depending on the frequency span the measurement speed may become very slow when you set this below 10kHz The values which can be set by vary by Spectrum analyzer t...

Page 157: ...y range is from 0Hz min to 500MHz max If the system has E4402B 3GHz spectrum analyzer with the E5040A the frequency range is 0Hz min to 3GHz max Data Pattern Specifies the data pattern to be written on the test track To set the data pattern click on the Configuration Setup Pattern Config buttons to open the data pattern menu Track Specifies the track number to be tested Meas Type Specifies the typ...

Page 158: ...n to set the input range automatically Unload Unloads the head from the media Head noise is measured Load Loads the head on the media Media noise is measured Abort Aborts unexpected long measurements 2 Set the parameters click on each button to enter a new value Detection Mode Specifies the detection mode of the signal analyzer Select sampling mode when measuring noise And select positive peak mod...

Page 159: ...to the value of RBW Start Freq Specifies the starting frequency of the spectrum analyzer for spectrum measurement If the system has 4395A the frequency range is from 0Hz min to 500MHz max If the system has E4402B 3GHz spectrum analyzer with the E5040A the frequency range is 0Hz min to 3GHz max Stop Freq Specifies the stopping frequency of the spectrum analyzer for spectrum measurement If the syste...

Page 160: ...to Scale is pressed the graph scale will adjust itself automatically to its maximum and minimum values 4 Click the Return button to return to Measure menu Measurement Display The measurement window shows the measured noise expressed in terms of rms volts The plotted spectrum shows the measured signal since positive peak is chosen as the detection mode Artisan Technology Group Quality Instrumentati...

Page 161: ...s unexpected long measurements 2 Set the parameters click on each button to enter a new value Channel Bit Rate Specifies the speed at which data bits are written on the media per second bps Write Current Specifies the current applied to the write head Sense Bias Specifies the current applied to the read head Test Counts Specifies the number of counts for popcorn noise This parameter can be set fro...

Page 162: ...t the beginning of each write operation is always the same On the other hand when Write Mode is set to continuous the write current direction is the same as the last current direction of the previous write operation Each time it alternates it allows you to check the polarity of the output pulse at the end of the previous write You must set the repetitive period of the data pattern T to 1T 2T 4T an...

Page 163: ... to select the different data patterns for write excitation from the standard data pattern independently This also allows you to select the erase patterns as a write pattern 3 Click on the Measure button to start measurement Measurement Display The upper left portion of the window shows the FAILCOUNT Fail count represents the number of times that popcorn noise has occurred 4 Click the Return butto...

Page 164: ...unter Menu Abort Aborts unexpected long measurements 2 Set the parameters click on each button to enter a new value Channel Bit Rate Specifies the speed at which data bits are written on the media per second bps Write Current Specifies the current applied to the write head Sense Bias Specifies the current applied to the read head Test Counts Specifies the number of test counts The setting range is...

Page 165: ...t to fixed the write current direction at the beginning of each write operation is always the same On the other hand when Write Mode is set to continuous the write current direction is the same as the last current direction of the previous write operation Each time the write current alternates it allows you to check the polarity of the output pulse at the end of the previous write You must set the...

Page 166: ...splayed when you set the Write Mode to Continuous NOTE The parameter values of Channel Bit Rate Write Current and Sense Current that have been set in the Configuration menu will automatically update similar parameters in this menu 3 Click on the Measure button to start measurement Measurement Display The upper left side of the window shows the total number of detected popcorn noise FAILCOUNT Total...

Page 167: ...tomer specified channel IC The parameters of the channel IC is programmable according to test requirements and measurement applications In general BER is used to measure what fraction of the total bits are in error Measurement Procedure Click on BER button from the measurement menu to open the Bit Error Measurement menu Figure 3 107 Bit Error Measurement Menu Artisan Technology Group Quality Instr...

Page 168: ...et the parameters click on each button to enter a new value Data Rate Specifies the number of data bits to be recorded per second BER Pattern Specifies the pattern number to be used to write the data pattern The data pattern of the selected pattern number must be specified in the Pattern Config menu in advance Track Specifies the track number to be tested Optimize Type Selects the sequence type Th...

Page 169: ...Delay Coarse Optimizes the precompensation delay to reduce magnetic non linearity effects This parameter precompensates one preceding bit of the data pattern Refer to Precompensation Setting Menu to set the parameters Low Pass Filter Optimizes the low pass filter If ON is selected the boost gain cut off frequency and group delay are operated at optimum performance Prec Delay Fine Optimizes the pre...

Page 170: ...ck on the Exec Optimize button to execute optimization 8 Click the Return button to return to BER main menu The More Config Pattern Config Register Config BER Config and Ch Qual Config buttons are used for additional configuration settings Click on any of these buttons to set a new parameter value as required by measurement applications Measurement Results The upper left portion of the main menu s...

Page 171: ...mpensation Function on page 274 2 Set the parameters click on each button to enter a new value Sector Data Log Mode Specifies the logging mode of the sector data If ON is selected the number of error bytes for each sector is counted and displayed on the View Sector Data If OFF is selected the number of error counts for a particular sector is not counted and it deactivates the View Sector Data butt...

Page 172: ...Specifies the pattern number to be used for bit error rate measurement The data pattern of the selected pattern number must be specified in the Pattern Config menu in advance Average Specifies the number of tests to get the average result Average is equal to the number of times a measurement sequence is repeated Refer to hpe5022_BER_berMeas ByteCount function of the programming manual for details ...

Page 173: ...itten on the background adjacent track Position Specifies the position to write the background adjacent track The adjacent track position can be set from 0 µm min to 6 µm max See Figure 3 110 Foreground Adjacent Track Setting Adjacent Track Mode Specifies the type of foreground adjacent track Data Pattern Specifies the data pattern to be written on the foreground adjacent track Position Specifies ...

Page 174: ...le 5 Chapter Title Figure 3 110 Adjacent Track Position 4 Click the Drift Compensation Setup button to open the Track Offset Compensation window Figure 3 111 BER Menu Track Offset Compensation Setup Compensation Profile Setting Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 175: ...pensating a head position are performed at each revolution specified by this value 5 Click the Measure button to start measurement Measurement Display The upper left portion of the menu shows the Bit Error Rate of Error Symbols of Lost Sectors and Total Sectors The of Error Symbols counts the number of detected error bytes per sector The of Lost Sectors counts the sector where the synchronous patt...

Page 176: ...r the number of error symbols per sector i e the number of detected error bytes per sector as reported by Err graph line The Lost graph line on the other hand reports the lost sectors when the sync pattern is not detected 7 Click on View Err Log button to open the view error logging window BER View Err Log Window Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisan...

Page 177: ...ch sector where data error is detected 8 Click on Error Length button to open the error length window BER Error Length Window This window shows the length of the counted errors 9 Click the Return button to return to BER menu Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 178: ...the parameters set at Optimize menu for optimum measurement results Optimization is required whenever you change the User Data Rate and Endec parameters 2 Set the parameters click on each button to enter a new value Data Rate Specifies the number of data bits to be recorded on the media per second A user data is supplied to the encoder after encoding this user data is transformed into a channel da...

Page 179: ...onfig Pattern Config Register Config BER Config and Ch Qual Config buttons are used for additional configuration settings Click on any of these buttons to set a new parameter value as required by measurement The BER Config menu have the same setting and format as the Configuration of the BER Main menu 4 Click the Measure button to start measurement Measurement Display The upper left portion of the...

Page 180: ... for both bit error rate and channel quality measurements Measurement Procedure 1 To open the Data Rate Sweep menu click on the Data Rate Sweep button from the BER Main menu Figure 3 112 Data Rate Sweep Menu NOTE Before you execute this measurement you should set an appropriate input range or execute the Auto Configuration to set the input range automatically Artisan Technology Group Quality Instr...

Page 181: ...pecified in the Pattern Config menu in advance Average Specifies the number of tests to get the average result Average is equal to the number of times a measurement sequence is repeated Refer to hpe5022_BER_berMeas ByteCount function of the programming manual for details Track Specifies the track number to be tested Meas Type Specifies the type of measurement sequence 1 Erase Write Meas means to e...

Page 182: ...onfig Register Config and BER Config buttons are added for additional configurations Click on any of these buttons to set a new parameter value as required by measurement applications The BER Config menu have the same setting and format as the Configuration of the BER Main menu 4 Click the Measure button to start measurement When Auto Scale is pressed the graph scale will adjust itself automatical...

Page 183: ...rn Config menu in advance Track Specifies the track number to be tested Meas Type Specifies the type of measurement sequence 1 Erase Write Meas means to erase write data then measure 2 Write Meas means to write data then measure 3 Meas means to measure only Start Data Rate Specifies the starting point of the data rate Stop Data Rate Specifies the stopping point of the data rate NOP Specifies the n...

Page 184: ... set a new parameter value as required by measurement applications The BER Config menu have the same setting and format as the Configuration of the BER Main menu 4 Click the Measure button to start measurement When Auto Scale is pressed the graph scale will adjust itself automatically to its maximum and minimum values Measurement Display The upper left portion of the menu shows the computed Ch Qua...

Page 185: ... a new value OTC Threshold Specifies the off track capability threshold The threshold limit can be set from 0 min to 1 max Meas Bytes Specifies the number of bytes to be measured BER Pattern Specifies the pattern number to be used to write the data pattern The data pattern of the selected pattern number must be specified in the Pattern Config menu in advance Average Specifies the number of revolut...

Page 186: ...n the setup menu and select the type in the Erase Type parameter 3 The More Config Pattern Config Register Config and BER Config buttons are added for additional configurations Click on any of these buttons to set a new parameter value as required by measurement applications The BER Config menu have the same setting and format as the Configuration of the BER Main menu 4 Click on the Measure button...

Page 187: ...E Measurement Program Operation Measurement Figure 3 113 OTC Definitions 5 Click the Return button to return to BER Main menu Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 188: ...pecifies the off track capability threshold If an adjacent track is written close to the data track the off track capability of the system becomes limited Meas Byte Specifies the number of bytes to be measured BER Pattern Specifies the pattern number to be used to write the data pattern The data pattern of the selected pattern number must be specified in the Pattern Config menu in advance Track Sp...

Page 189: ...p will be computed and updated automatically The NOP can be set from 1 min to 201 max Adjacent Offs Step Specifies the step by which the adjacent track position is decremented to measure and plot the 747 curve If you set this parameter with Adjacent Offs Start and Adjacent Offs Stop Adjacent Offs NOP will be computed and updated automatically 3 Click on the 747 Setup button to set the parameters b...

Page 190: ...ttern number to be used to write the data pattern of the adjacent track The selected pattern number must be specified in the Pattern Config menu in advance 4 Return to the 747 measurement menu after setting the parameters 5 The More Config Pattern Config Register Config and BER Config buttons are added for additional configurations Click on any of these buttons to set a new parameter value as requ...

Page 191: ... Sweep Menu The measurement procedures for Register Sweep menu is provided in the Manual Supplement because it is channel IC dependent Refer to the Manual Supplement for details Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 192: ...R button for voltage bias to specify the DC resistance of the MR head This value is required when the current bias type in the setup menu is set at the voltage When Auto program is checked the measured read DC resistance is set automatically 4 Click Reference Write DCR button for write current to specify the DC resistance of the write head When Auto program is checked the measured write DC resista...

Page 193: ...election Menu click Overwrite from the Measure menu NOTE Before you execute this measurement you should set an appropriate input range or execute the Auto Configuration to set the input range automatically 2 Click Overwrite to open the Overwrite Menu Figure 3 115 Overwrite Selection Menu 3 Set the parameters Click each button to enter a new value Artisan Technology Group Quality Instrumentation Gu...

Page 194: ...eLF Specifies the repetitive period of the LF pattern for overwrite measurement Track Specifies the track number to be tested Average Specifies the number of revolutions to get the average results NOTE The parameter values of Channel Bit Rate Write Current and Sense Current that have been set in the Configuration menu will automatically update similar parameters in this menu 4 Click the Measure bu...

Page 195: ...Selection Menu click Overwrite in the Measure menu NOTE Before you execute this measurement you should set an appropriate input range or execute the Auto Configuration to set the input range automatically 2 Click Sectored Overwrite to open the Sectored Overwrite Menu Figure 3 117 Overwrite Selection Menu 3 Set the parameters Click each button to enter a new value Artisan Technology Group Quality I...

Page 196: ...rite measurement Track Specifies the track number to be tested Average Specifies the number of revolutions to get the average results of Sectors Specifies the number of sectors to divide of Sectors for Gap Specifies the number of sectors to skip after writing one sector NOTE The parameter values of Channel Bit Rate Write Current and Sense Bias that have been set in Configuration menu will automati...

Page 197: ...he parameters click on each button to enter a new value Channel Bit Rate Specifies the speed at which data bits are written on the media per second bps Write Current Specifies the current applied to the write head Sense Current Specifies the current applied to the read head Track Specifies the track number to be tested Average Specifies the number of revolutions to get the average results NOTE The...

Page 198: ...pter Title Measurement Display The menu shows the mean min max and std deviation of the measured Partial Erasure The graph displays the partial erasure result for every revolution 4 Click on the Return button to return to Measure menu Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 199: ...e input range automatically 2 Set the parameters click on each button to enter a new value Channel Bit Rate Specifies the speed at which data bits are written on the media per second bps Write Current Specifies the current applied to the write head Sense Current Specifies the current applied to the read head Data Pattern Selects the data pattern for this measurement Average Specifies the number of...

Page 200: ...Pos Specifies the write position for both side tracks NOTE The parameter values of Channel Bit Rate Write Current and Sense Current that have been set in the Configuration menu will automatically update similar parameters in this menu 3 Click on the Measure button to start measurement Measurement Display The menu shows the mean min max and std deviation of the measured side reading The graph displ...

Page 201: ...ut range automatically 2 Set the parameters click on each button to enter a new value Channel Bit Rate Specifies the speed at which data bits are written on the media per second bps Write Current Specifies the current applied to the write head Sense Current Specifies the current applied to the read head Data Pattern Selects the data pattern for this measurement Average Specifies the number of revo...

Page 202: ...os Specifies the erase position for both side of the track NOTE The parameter values of Channel Bit Rate Write Current and Sense Current that have been set in the Configuration menu will automatically update similar parameters in this menu 3 Click on the Measure button to start measurement Measurement Display The menu shows the mean min max and std deviation of the measured side erase The graph di...

Page 203: ... head and then read it by another head Measurement Procedure NOTE Before the track search is performed the toggle switch of Measure R W offset after head is moved must be not checked Figure 3 122 Setup Menu 1 To open the Track Search menu click on the Track Search button of the Measure menu Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 204: ...is Either track or radius skew should be specified Skew Specifies a skew of the start position Even after the track search is done this is not change Band Erase Range Specifies the range of erase Clicking Erase button erases a whole area between minus this value to plus this value from the start position specified in track or radius skew Band Erase Pitch Specifies a pitch of the erase The head is ...

Page 205: ...the Cassette Parameter Even when a head is unloaded the spindle is still running to avoid a media slipping 6 Click on the Search button to find a track After finding a track the head position is changed where it is by actuating X Y stages Then a track profile measurement is made Its result profile curve and read write offset is displayed on the left of the screen The setting of the track profile m...

Page 206: ... parameters in this menu 2 Set the parameters click on each button to enter a new value Channel Bit Rate Specifies the speed at which data bits are written on the media per second bps Data Pattern Specifies the data pattern to be written on the test track To set the data pattern click on the Configuration Setup Pattern Config buttons to open the data pattern menu Write Current Specifies the curren...

Page 207: ...written or erased for revolutions specified by this Band Erase Range Specifies the erase range for band erase Band Erase Pitch Specifies the erase pitch for band erase Figure 3 126 Parameter of Band Erase 3 When required by measurement applications click on the Erase Write BandErase WriteAlways and Write Burst Pattern buttons When Write Always is used click on Abort Write button when the user want...

Page 208: ...attern Write 1 Click the Burst Pattern Write button to open the Burst Pattern Write menu The bust pattern write is only to write a burst pattern When you want to compensate the position use the track offset compensation function such as Comp Always Figure 3 127 Erase Write Burst Pattern Write Menu 2 Set the parameters click on each button to enter a new value Frequency Specifies the frequency at w...

Page 209: ...ern See Figure 3 129 on page 208 Figure 3 128 Delay Aperture Figure 3 129 Write Timing of Burst Pattern NOTE Due to internal constraints of E5037A data generator module data writing is actually delayed by a value of 30 16T T 1 f where f is the frequency of the burst pattern Thus the user must compensate this value when setting the burst length Refer to hpe5022_burstPatternConfig function of the pr...

Page 210: ...s click on each button to enter a new value Track Offset Compensation Activates the track offset compensation function When it is not checked the position error is monitored without the position compensation Cal Write Executes the calibration for track offset compensation and writes the burst patterns Stop Count Specifies how many times the monitor compensation sequence s is repeated Meas Interval...

Page 211: ...versus time NOTE When the track offset compensation is turned off if the position error exceeds approximately one third of the write track width the hpe5022_ERROR_DATA_CORRUPT error may be displayed This is because the position error can monitor within the range that the Position Error Signal PES is linear If the error is displayed although the position error is within the one third of the write t...

Page 212: ...t using the VEE measurement program Test Environment or auto alignment functions of the hpe5022_32 dll the spinstand must have the initial alignment data in the non volatile memory because the spinstand cannot perform the erase and write operation in the auto alignment process without the alignment data If the alignment data is lost by some trouble you must first restore the data using the recover...

Page 213: ...rmed NOTE The positive and negative skew angles should be from 3 0 to 30 0 and from 60 0 to 3 0 respectively 3 Click Measure button to start the auto alignment In the Current State box in the auto alignment menu the auto alignment status is displayed See Auto Alignment on page 317 for the detailed auto alignment algorithm Disk Type Default Start Radius 1 8 inch 0 018 meter 2 5 inch 0 0255 meter 3 ...

Page 214: ...d for both up face and down face HGAs Rough tune Finding the skew 0 position by searching the written track Fine tune first step Searching the skew 0 3 3 positions on the track and calculating the spindle center position Fine tune at skew 0 step 1 positive step 1 negative Searching the skew 0 step 1 positive and step 1 negative positions on the track and calculating the spindle center position The...

Page 215: ...peration Measurement Service Overview The service menu allows you to evaluate the spinstand performance Contact Agilent Technologies for information Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 216: ...n the Configuration menu will be saved This newly saved parameters will be the default parameters in the configuration menu the next time the user runs the program NOTE To end the program make sure that you click the Quit button If you click the VEE stop button i e the x mark on the upper right corner of the menu to end the program it could cause an initialization failure of the VEE program the ne...

Page 217: ...E Measurement Program Operation Exit the VEE measurement program 2 Click Yes to end the program Figure 3 134 End the Program Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 218: ...hapter Title Configuration 5 Chapter Title 4 Configuration This chapter provides the information about the measurement configurations of E5022 E5023 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 219: ...e is running the spinstand related settings can not be changed Advance Configuration View Spinstand 1 Click on Configuration Spinstand to view the set parameters of the spinstand Figure 4 1 Spinstand 2 The parameters specified in the Spinstand menu will automatically update similar parameters in this menu 3 Click Advanced to set the spindle speed for head loading unloading 4 Click Return to return...

Page 220: ... selected for precompensation delay from the Precomp Status frame Click on Delay1 Delay2 and or Delay3 to set the delay time Each corresponding Add Pattern is used to select the type of precompensation pattern as shown in Figure 4 3 When you click on Add Pattern a dialog box Precomp Pattern Select will pop up Select the type of precompensation pattern for the specified data pattern of Precomp Stat...

Page 221: ...ration Figure 4 3 Precomp Pattern Select Menu 2 Click on OK to set the precompensation pattern 3 Click the Return button to return to setup menu Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 222: ...e input range can be set manually by the user Consequently this will activate the Input Range and PW Reference buttons Reference Isolated Pulse TAA Specifies the reference TAA of the isolated pulse Ref Isolated Pulse PW Length Specifies the reference PW Length of the isolated pulse Input Range Sets the input range manually when Measurement Mode is set to Manual Mode PW Reference Sets the pulse wid...

Page 223: ...anual Frequency Mode Specifies the type of measurement frequency Two frequency modes can be selected namely auto and manual modes If Auto Mode is selected the measurement frequency is set automatically with relative to the channel bit rate and data pattern If Manual Mode is selected the frequency set by the Center Frequency is used RBW Specifies the resolution band width when spectrum analyzer is ...

Page 224: ...nformation in the EEPROM in the head amplifier and reads the corresponding information file under the system software directory This function allows you to use the head amplifiers without the EEPROM in itself The system reads the specified information file The assistance from Agilent is required when users develop the information files Figure 4 6 Head Amp Info File Menu Head Amp Info File Specifie...

Page 225: ...currently installed head amplifier Example E5022 66507 In VEE program the RIN LF Pole HF Gain Boost and Writer Bias parameters can be configured when TDA 5360 type amplifier is used The parameters that can be set in the Head Amp Setup depends on the property of each head amplifier being used Figure 4 7 Example of Head Amp Config Menu using E5022 66507 RIN Specifies the type of reader input resista...

Page 226: ... head amplifier is not supported by the DLL only the parts number and serial number will be displayed Figure 4 8 Head Amp Config Menu E5035A When the system has the E5035B 1 Click on Configuration Setup Head Amp Config to open the head amplifier configuration menu The head amplifier configuration menu allows you to set the data at any register oin the head amplifier IC Artisan Technology Group Qua...

Page 227: ...226 Chapter4 Configuration Configuration Figure 4 9 Head Amp Config Menu E5035B Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 228: ...analyzer NOTE The LCD display of the spectrum analyzer is usually in the off state when measurement is in progress NOTE This function can be activated when the system has the 4395A spectrum analyzer When the system has E4402B 3GHz spectrum analyzer the waveform is always displayed on the analyzer s display Figure 4 10 Spectrum Analyzer Display Menu 2 Click the Return button to return to Setup menu...

Page 229: ...vement is not changed Settling Time Specifies a additional wait time after the fine positioning piezo movement before the next step start Normally the piezo is moved during one or two spindle revolutions then the write read sequences is done at the next revolution If you wait one or two more revolution before the write read sequences start the piezo position might be more stable So that this might...

Page 230: ...pter Title Configuration 5 Chapter Title Figure 4 12 Configuration Menu Spinstand Configuration Menu 1 Click on Configuration Spinstand to open the Spinstand menu Figure 4 13 Spinstand Menu Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 231: ...The outermost track number starts at 0 The number of tracks is equal to the number of specified tracks plus 1 Track Pitch Specifies the distance between the centers of two adjacent tracks Disk Size Shows the size of the disk This parameter is specified at the factory In Spindle Frame the speed and acceleration of the spindle rotation can be specified RPM Specifies the speed of spindle rotation Acc...

Page 232: ... as the radius of the head at initial loading This is no the same as initial radius Load Mode Specifies the type of loading as either Dynamic or Static Loading Dynamic is a type of loading where the spindle rotation is continuous when the head is loaded and or unloaded Static is a type of loading where the spindle rotation stops during loading and unloading of the head thus resetting the rotation ...

Page 233: ...hpe5022_ERROR_INV_PARAMETER When the skew angle is set below 30 degrees the user may need to uncheck the Measure R W offset parameter in the Setup menu or set the range of the background track offset to a value lower than 6µm to avoid generating an error Refer to hpe5022_headLoadConfigEx function of the programming manual for details Load Mode Specifies the type of head loading Select either Dynam...

Page 234: ...ide of the media When On is selected the head position and loading unloading position must be inside of the disk size When Off is selected the head position and loading unloading position can be set outside of the disk size Initial Radius Specifies the initial radius after loading the head i e after load radius Initial Skew Specifies the initial skew angle after loading the head i e after loading ...

Page 235: ...t to Center Specifies the distance between the pivot and the center of the spindle Pivot Gap Specifies the distance between the pivot and the reference point of the HGA Figure 4 17 Skew and Radius setting display Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 236: ...the head speed between the ramp load position and the media load position Click on Advanced button on the Ramp Load frame to set the initial radius initial skew and disk size restriction Figure 4 18 Advanced Ramp Load Config Menu Init Radius Specifies the radius that the head is moved to after the head is loaded Init Skew Specifies the skew angle that the head is moved to after the head is loaded ...

Page 237: ...236 Chapter4 Configuration Configuration Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 238: ...23 measurements The Agilent E5022 E5023 is provided with a set of Windows Dynamic Link Libraries DLLs and a demo program written in VEE that calls these DLLs The DLL syntax is in the Programming Manual This chapter also contains the detailed information on how measurements are performed Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 239: ...ametric measurement in the Agilent E5022 E5023 is defined as a measurement that includes TAA PW Baseline and resolution as a group Also Agilent E5022 E5023 allows you to observe a measurement parameter versus a swept parameter such as a read offset and a write sense current That is called a parametric sweep measurement Table also shows you which measurement parameters can be measured by a sweep me...

Page 240: ...ce module measures this parameter NLTS by Time Correlation OS NLTS by Dipulse Extraction OS SNR PM Spectral SNR SA Spectrum SA Overwrite SA Partial Erasure SA Baseline Popping SA Popcorn PM Bit Error BET Channel Quality BET 1 Abbreviations PM Parametric Module SA Spectrum Analyzer OS Oscilloscope BET Bit Error Test Module Supported Measurement Parameter versus Sweep Parameter Meas Parameter Inst 1...

Page 241: ...ic module is used for TAA measurement it is measured as the average peak to peak amplitude for a number of disk revolutions The number of revolutions for averaging is specified by the ave parameter TAA positive TAA is the average amplitude between the baseline reference specified by the hpe5022_baselineReference function and the positive peaks TAA negative TAA is measured between the baseline refe...

Page 242: ...ason is as follows The sensitivity of the peak detector in the module is changed depending on the pulse width As the pulse width becomes narrower the gain of the peak detector becomes lower So that the module can compensate the measured amplitude level for pulse width The pulse width value is calculated from the PW reference value which is specified by the hpe5022_pwReference function See Input Ra...

Page 243: ..._wavePw_Q Parametric Module When the parametric module is used for PW measurement it is measured as the average pulse width for a number of revolutions The number of revolutions is specified by the ave parameter The threshold voltage is given as a percentage level between the baseline reference specified by the hpe5022_baselineReference function and the TAA levels PW positive PW is the average of ...

Page 244: ...tle 4 Chapter Title Measurement Definition Figure 5 3 Fixed mode PW Measurement Definition The PW Asymmetry is defined as follows Equation 5 5 PW Asymmetry Definition PWAsymmetry PWpositive PWnegative Ð PWpositive PWnegative Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 245: ...ric module is used to measure a baseline it has a specified threshold level which is defined as a percentage of TAA or TAA The threshold level is defined by hpe5022_baselinePllThreshold The default is a threshold level of 50 In general it is not necessary to change this The module observes points on the positive slopes at the threshold level Points A and B in the Figure 5 5 Baseline is defined as ...

Page 246: ...Definition 1 Chapter Title 2 Chapter Title 3 Chapter Title 4 Chapter Title Measurement Definition Figure 5 5 Baseline Measurement Definition using the Parametric Module Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 247: ... Sampling Phase Definition Resolution Measurement Resolution is defined as the ratio of the TAA resulting from two frequencies HF and LF written on the same track with the same write current Resolution is measured by a parametric module Both TAAHF and TAALF are expressed in volts V Resolution is an old test method which is used to measure the effect of how close together transitions occur The HF T...

Page 248: ...symmetry is defined as 1 4 the difference between the adjacent pulse pair spacings Tl and Ts averaged over many pulse pair spacings This method is considered as traditional since it requires more complex measurement equipment and longer measurement time In time asymmetry if the transition time from positive pulse to negative pulse is less than the transition time from negative pulse to positive pu...

Page 249: ...5 MHz and the spectrum analyzer measures the amplitude at this frequency Stability Measurement Stability measurement is used to observe the amplitude variation of signals during the write read iterations of the head in individual sectors segments on a track A write data pattern is written for one revolution After that the previously written track is divided into segments by controlling the write o...

Page 250: ...ite and read in each sector can be specified by the write ratio and read ratio parameters The portion named I is defined as an idle section or delay time Figure 5 9 Write Read Ratios The illustration above shows the partition of the write ratio read ratio and idle in a single sector See the Stability Functions in the Programming Manual Artisan Technology Group Quality Instrumentation Guaranteed 88...

Page 251: ... operation is set in terms of ratio relative to the segment sector length This method does not provide sufficient test results to evaluate the head instability Measurement sequence of this test is similar to Stability Measurement on page 248 except for gate time setting Figure 5 10 Segment Setting by Absolute Time With this newly incorporated function in measuring stability the user should decide ...

Page 252: ...cally set the spindle speed to 2400 rpm When RPM is set 2400 rpm the system will execute the spindle speed specified by the user Table 5 1 Restrictions in Setting the Gate Time RPM spindle speed when spindle speed 2400 rpm RPM 2400 rpm when spindle speed 2400 TrackTime 60 RPM SegmentTime writeTime delay readTime TrackTime writeTime 100 µsec TrackTime SegmentTime 30 µsec For TAA PW TrackTime Segmen...

Page 253: ...etry Definition As shown in Figure 5 11 TAAp p is measured as the average peak to peak amplitude for several waveform periods TAA positive is defined as the average amplitude measured between the baseline reference and the positive peak value While TAA negative is defined as the average amplitude measured between the baseline reference and the negative peak value With TAA Asymmetry defined as the ...

Page 254: ...aseline is the amplitude measured half way between the negative and positive peaks i e n to p order Baseline is the average amplitude level measured between the Baseline and Baseline While Separation is defined as the amount of baseline shift between Baseline and Baseline Separation occurs due to track edge effect during write operation Head geometry such as untrimmed write heads unequal write pol...

Page 255: ... basis in determining the condition of the head to be tested If the result is positive then a positive value of Absolute Polarity must be followed for normal pinned layer of the head If the result is negative then a negative value of Absolute Polarity must be followed for normal pinned layer of the tested head Consequently if the tested head yields a value i e absolute polarity whose sign is oppos...

Page 256: ...ayer if the output pulse satisfies the condition in Figure 5 13 then pinned layer is normal Equation 5 13 Condition for Normal Pinned Layer As shown in Equation 5 13 TAA of tribit TriTAA is smaller than the TAA of Isolated Pulse IsoTAA Since three consecutive transitions tribit are written the resulting pulse will be affected by ISI intersymbol interference resulting in a smaller and compressed Tr...

Page 257: ...is reversed when the output pulse becomes opposite to the direction of the media s magnetization From the illustration above if the output pulse of triTAA is smaller than isoTAA and assuming that triTAA is the same as isoTAA then the pinned layer is reversed satisfying the condition above triTAA isoTAA triTAA Ð isoTAA Ð Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www ...

Page 258: ...Layer Reversal with Asymmetrical TAA In another case similar to Equation 5 14 even if TAA is asymmetrical the inequality of pinned layer reversal never changes since triTAA is always the same as isoTAA and triTAA is always smaller than isoTAA This condition also satisfies Equation 5 14 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 259: ... And when Absolute Polarity 0 then the pinned layer is reversed Read second paragraph of Absolute Polarity Test on page 254 The measurement sequence of Absolute Polarity Test is as follows 1 Write the isolated pulse pattern 2 Measure TAA of isolated pulse by denoting TAA and TAA of the isolated pulse as isoTAA and isoTAA respectively 3 Write the 1 3 bit pattern or user defined absolute polarity pa...

Page 260: ...nsisting of isolated transitions separated by 15T repetition period of this sequence is 30T and measures the amplitude of the same harmonics of this new pattern X 5f0 NLTS is defined as Equation 5 16 NLTS 5th Harmonic method Definition Where f0 1 30T Dipulse Extraction Method Dipulse extraction is a method used for quantifying the amount of nonlinear distortion present in the recording and playbac...

Page 261: ...la Where N The length of Pseudo Random Bit Sequence m averaging factor Specified by the hpe5022_waveAverage function the formula of r is shown in Correlation Definition NLTS Definition NLTS is defined as Equation 5 19 NLTS Calculation Formula Where D is the specified Delay echo location N The length of Pseudo Random Bit Sequence m averaging factor Specified by the hpe5022_waveAverage function the ...

Page 262: ...rement is performed by the parametric module Equation 5 21 SNR SNR is measured from the equation given above where Equation 5 22 Crest Factor VppTAA defined as the peak to peak voltage of the TAA VMaxNoise is defined as the maximum voltage for one revolution of the erased track r V t V t NT 1 NT V t V t NT t d 0 NT V t V t NT Ð V t 2 V t 2 Ð V t NT 2 V t NT 2 Ð Þ V t 1 NT V t t d 0 NT V t 2 1 NT V...

Page 263: ...en after write Since thermal noise causes the occurrence of popcorn noise a longer delay time from write to read could affect the accuracy of popcorn noise detection When using the E5022 E5023 to measure popcorn noise you might wonder why the head remains unloaded from the media when you re measure This is because this type of test has nothing to do with the media noise i e it s not concerned with...

Page 264: ...shold level at point c As shown in Figure 5 16 left a narrow hysteresis window translates to high sensitivity in detecting popcorn noise particularly at low amplitudes Count specifies the number of times to count popcorn noise As shown in the figure above for each count the detected popcorn noise for both positive and negative amplitudes are counted as failcount and failcount by their respective t...

Page 265: ... the user data is supplied to an encoder An encoder adds additional spacings between transitions in order to limit distortions caused by intersymbol interference ISI After encoding the user data is transformed into a channel data The channel data is the actual data written on the media but needs to be transformed into some means of magnetization such as NRZ non return to zero The rate at which enc...

Page 266: ...digitized data is then equalized for partial response The Detector is used to detect the entire sequence bits at a time as it receives data sample it doesn t decode immediately whether the sample is 1 or 0 in the original write data Instead it compares sequences of samples with sequences of possible samples It then uses a comparator to determine what an entire sequence of data bits should be After...

Page 267: ...meter must be specified in the BER Configuration menu This parameter specifies the number of error bits to be counted per byte Total Sector counts to the total number of sectors including lost sector in a track Lost Sector counts the number of sectors where the synchronous pattern is not detected Error Symbol counts the number of detected error bytes per sector Figure 5 19 DataBytePer Sector speci...

Page 268: ...nter to the right and left sides of the bathtub curve As the head is shifted off the track center the bit error rate becomes poorer and gets better when the head is closer to the track center When performing the bathtub test first write the test track The read head which is centered on the test track reads the written data pattern The read data pattern is evaluated and compared with the original d...

Page 269: ...h in order optimize the number of tracks per inch TPI of a magnetic recording system When a head is shifted off the track center it picks up some part of the readback signal from the data track and some noise signal from the media When an adjacent track is written close to the data track it limits the off track capability OTC of the recording system as it picks up interference signal from the adja...

Page 270: ...sed strip on the media This erase strip decreases the interference signal of the adjacent track and as a result it increases the OTC required to reach a specified level as shown in Figure 5 23 Figure 5 24 The data track is overwritten by the adjacent track 3 When the adjacent track is written close enough to overwrite the data track The read head starts to pick up the interference signal from this...

Page 271: ...inch At the peak of the 747 hump you are at the closest distance from the track center with the widest OTC i e the optimum point The measurement procedure of the 747 test is as follows 1 Write an old data with a fix position from the data track 2 Overwrite the old data track with a new data track 3 Write an adjacent track with a particular distance offset from the data track 4 Measure the off trac...

Page 272: ...5 26 This inconsistency results in the distortion of the output signal that affects the signal to noise ratio overtime One of the factors that causes distortion of the output signal is Barkhausen Noise Barkhausen noise are noise spikes that occur due to discontinuous irreversible domain wall motion of the head Figure 5 26 MR Response Curve It is also important to realize that even when optimum bia...

Page 273: ...s noise reference is measured at the frequency specified by hpe5022_shnrConfig function 5 Next sense current go to step 3 6 Write data at the track center specified by hpe5022_write function 7 For read offset offtrk_pos 0 readOffset to offtrk_pos offtrk_pos_points 1 readOffset 8 For sense current ib 0 to ib_points 1 9 Let Sum TAA 0 10 For average 1 to n 11 Perform write excitation during wrTime wr...

Page 274: ... Next read offset go to step 7 19 For ib_index 0 to ib_points 1 20 Calculate the SHNR data as SHNR_DATA ib_index 20log Max Aver_TAA ib_index Noise_Ref ib_index Equation 5 25 Calculation of SHNR 21 Next sense current go to step 19 22 Denote SHNR as the maximum SHNR from the data array i e SHNR Max SHNR_DATA SHNRdata 20 MaxAverTAA NoiseRef log Artisan Technology Group Quality Instrumentation Guarant...

Page 275: ...nctions in the UDS function if the track offset function is turned on the gate of read write is delayed in the period of burst pattern as if the index pulse is located at the imaginary index position Figure 5 28 The burst pattern area is used for the Track Offset Compensation function The Track Offset Compensation can be divided into four sequences Calibration Write Burst Pattern Read Burst Patter...

Page 276: ...ackOffsetCompPattern function Figure 5 29 Calibration Sequence Write Burst Pattern Write Burst Pattern sequence writes the burst patterns in the first portion of the track The data pattern will be written after the burst pattern later during the measurement sequence such as hpe5022_measureTAA Both the calibration and the write burst pattern sequences Artisan Technology Group Quality Instrumentatio...

Page 277: ...in the programming manual in detail Figure 5 30 Write Burst Pattern Sequence The burst pattern position is able to have a offset from the track center The hpe5022_trackOffsetCompPatternPosition function defines the offset position This function allows you that the head position stays at not only the track center but also a certain offset position from the track center Figure 5 31 Burst Pattern Pos...

Page 278: ... is zero the read head located at the center of track When the PES is not zero the value determines how far from the center of track by using a PES line Both the read burst pattern and the Position compensation sequences are performed by the hpe5022_executeTrackOffsetComp function See the function in the programming manual in detail Figure 5 32 Read Burst Pattern Sequence Position Compensation A d...

Page 279: ...m to 4µm The maximum offset range is 6µm The value of the position compensation is reset at 0 when the calibration sequence is executed Both the read burst pattern and the position compensation sequences are performed by the hpe5022_executeTrackOffsetComp function See the programming manual in detail Figure 5 33 Track Offset Compensation Sample Track Offset Compensation Sequence Flow Although the ...

Page 280: ...nt program the head position is compensated just once before the sequences of writing and reading a data pattern In the sample program shown in the programming manual the sequences of reading burst pattern and setting the head offset compensation are performed each 10 revolution during measuring TAA parameters Off course you can create your own flow for the other measurements in your programming A...

Page 281: ...ck and the bit error test take a quite long time to measure and a head position is inclined to drift during a measurement sequence Therefore the track offset compensation function allows you to compensate the position automatically without executing the hpe5022_executeTrackProfileComp function during one measurement Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www arti...

Page 282: ...ng manual for detailed sequence In the bit error test the position is compensated at each revolution specified by the hpe5022_BER_trackOffsetCompInterval function when the track offset compensation state is turned on The E5022A reads the data several revolutions in this test in order to make a small bit error rate measurement In this case this function reads the burst data and compensates the head...

Page 283: ...h track rotation Thus in order to write multi burst pattern the user must set the gate parameters for each track rotation Procedure in writing Multi Bursts Pattern is as follows 1 Set the number of segments per track 2 Set the write track offset 3 Set the gate delay and gate aperture parameters See Figure 5 35 on page 282 Figure 5 35 Write Gate Timing 4 Set the burst start and burst length paramet...

Page 284: ...5 Set the frequency at which burst pattern is written using hpe5022_burstFrequencyConfig function 6 Write the burst pattern by executing hpe5022_writeBurst function 7 Repeat steps 2 to 6 and change the parameters i e burst start gate delay etc for multi burst pattern Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 285: ...aterial such as media and low coercivity for soft magnetic material such as magnetic head 2 Head geometry 3 Degree of asymmetry in the head read write response Building the Track Profile Measurement procedure in building the track profile is as follows 1 DC erase the track and its vicinity in order to provide a noise free medium background 2 Write the test track 3 Read the test track when the head...

Page 286: ... any track misregistration of this magnitude also called guard bands In practice in general it is the irregular output of the track profile that gives the most useful information for this helps the user to evaluate the performance of the read head As shown in Figure 5 37 Linear interpolation is applied at each point to determine the Track Profile Figure 5 38 Read Write Offset Definition Read write...

Page 287: ...th of the written track plus 50 percent of the erase band As data is written along the track the write head produces a fringe field that re magnetizes the media on each side of the track However this field has a different magnetic orientation and gradient such that it shouldn t interfere with the read signal output The fringe field is an inherent characteristic of the write head due to the head s ...

Page 288: ...f the micro track Create Micro Track Micro track is created by erasing both sides of the track as shown in Figure 5 40 resulting to a narrowed track Refer to the programming manual hpe5022_configMicroTrack for details Figure 5 40 Micro Track In order to create a micro track the erase start offset erase step width and its ratio how much of the original TAA of a track is to be transformed to a micro...

Page 289: ...pter5 Measurement Definition Parametric Sweep Measurement Definitions Figure 5 41 Parameters to create a Micro Track Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 290: ...ement Fast Micro Track Profile Measurement The fast micro track profile measurement is another method to make a micro track profile measurement The measurement speed is faster than one described in previous section This method creates a micro track by erasing side s of track at the specified width There is no level monitoring during erase This method includes a sequence to create micro track and t...

Page 291: ... should be large enough to saturate the media during write process 2 As erasure of previously written data is necessary to reduce error rates The write current should be large enough to achieve an acceptable overwrite 3 The write current influences the erase bands on the sides of the track width An increase in the write current will increase the fringe field this increases the width of the erase b...

Page 292: ...it Rate Sweep Measurement Channel bit rate sweep is a measurement to observe the special characteristics of TAA narrow band TAA PW Baseline Overwrite or NLTS by 5th harmonic method with respect to channel bit rate In addition it has the function to calculate bit density The detailed measurement sequence is described in Chapter 3 of the programming manual Roll off Measurement Roll off is a kind of ...

Page 293: ...ce is described in Chapter 3 of the programming manual Precompensation Sweep Measurement Precompensation Sweep is a measurement to observe the special characteristics of NLTS by 5th harmonic method for sweep values of write precompensation The write precompensation value data is set as a delay time from the original transition The detailed measurement sequence is described in Chapter 3 of the prog...

Page 294: ... more complex and expensive hardware The triple track test is a good alternative solution in determining the off track performance of the head Measurement procedure of the Triple Track Test is as follows 1 Perform band erase to eliminate noise from the media 2 Write the data at the track center 3 Measure the track profile of the TAA from the written test track 4 Specify the interpolation range whi...

Page 295: ...ot the original track profile at Squeeze position as an imaginary track profile as shown in Figure 5 47 9 Calculate the distance between the two interpolation lines at 0 threshold Squeezed OTRC is calculated as one half the difference between the right and left interpolation lines at floor level Figure 5 47 Computation of Squeeze OTRC 10 Write adjacent track data pattern specified by hpe5022_tripl...

Page 296: ... allows you to measure the effect on track profile amplitude when an adjacent erased signal is written close to the test track Figure 5 48 Calculation of Squash 12 Write the data track on both sides of the previously written test track as specified by OTRC Write Position OTRC Write Position is written at a distance from the test track relative to the write width ratio 13 Write the adjacent track d...

Page 297: ...ure 5 49 the the allowable OTRC is affected on how close the data tracks are written closer to the adjacent track It should also be noted that since the adjacent track is to overwrite the previous written signal it must be written at optimum write current Otherwise a poor overwrite could result in residual signal that could affect or degrade the OTRC performance of the head Artisan Technology Grou...

Page 298: ...for sector normalization and all profile data are normalized 3 Noise Floor Calculation Calculate Noise Floor using both Data and Squashed Data See Noise Floor Calculation Method on page 302 for the calculation algorithm 4 OTRC Signal and Normalized OTRC Signal Trace Calculation a Remove Noise Floor from Data using the following equation Data1 b Perform smoothing for Data1 The derived trace is call...

Page 299: ...Noise OD1 The result is called Side Noise OD2 e Compose SideNoiseID2 and Side Noise OD2 using the following equation the composite data is called Side Noise2 If Side Noise ID2 Side Noise OD2 Side Noise 2 Side Noise ID2 Else Side Noise2 Side Noise OD2 f OTRC Noise is derived from the following equation OTRC Noise g Normalize OTRC Noise as the maximum and minimum values of OTRC Signal are converted ...

Page 300: ...el Calculation Method on page 302 addNoise 1 or 0 user defined b Calculate Squeezed SNR profile from Squeezed Signal and Squeezed Noise If Squeezed Signal Squeezed Noise and Squeezed Noise Ng 0 and Ng Ni 0 then Squeezed SNR Else Squeezed SNR 0 where Squeezed Signal Squeezed Noise Ng Gaussian noise constant user defined Ni Interference constant user defined SNg Gaussian noise of Squeezed Signal pro...

Page 301: ...ange which includes the threshold and window size settings Refer to Figure 3 80 Best Fit Window on page 135 for details b Calculate the distance between the interpolation lines at 50 threshold and denote the measured distance as the Write Track Width WW c Calculate the distance between the interpolation lines at 0 threshold i e floor level Subtract the write track width from this result and denote...

Page 302: ...n the center of the track i e at zero offset and the center of the write track width And denote the measured distance as Read Write Offset RW offset Figure 5 53 Evaluation of Read Write Offset e Calculate Squash using the following equation Squash where TAAmax OTRC Signal value at maximum TAA position TAAsquash Squeezed Signal value at TAAmax position TAAsquash TAAmax Artisan Technology Group Qual...

Page 303: ...eLevel where count number of elements whose values are below noiseThrLevel sum sum of element s values below noiseThrLevel Noise Floor Calculation Method Noise Floor is calculated as follows 1 Calculate noise level noiseLevelD from Data and noise threshold ratio noiseThr in accordance with Gaussian Noise Level Calculation Method on page 302 2 Calculate noise level noiseLevelS from SquashedData and...

Page 304: ...cified from the read current list when the track has been dc erased Vrms is defined as the voltage level measured by changing the read current from the list From this two quantities Baseline Popping can be computed by the equation below The detailed measurement sequence is described in Chapter 3 of the programming manual Equation 5 26 Baseline Popping BaselinePopping Vrms Verase Artisan Technology...

Page 305: ...write HF and overwrite LF data patterns Agilent E5022 E5023 measures the RMS signal amplitudes of the original LF signal and the residual LF signal after overwriting it by an HF data pattern They are measured by a spectrum analyzer at the LF fundamental frequency In general high frequency pattern is characterized by having more 111 11 bits than 0 s And low frequency is characterized by having more...

Page 306: ... s magnetization This demagnetization field is largest at the transitions tips and closest to the previously written data Since the separation between transitions 2 and 3 is too narrow The zigzag tips of transitions 2 and 3 will cause the demagnetization field to reverse the magnetization between the tips resulting to a partial erasure of transitions 2 and 3 splitting it into isolated granules of ...

Page 307: ...ther Measurement Definitions transition shifts or NLTS It cannot be precompensated i e partial error is severe limitation of the magnetic recording Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 308: ...o be used The table below shows the type of data patterns that can be used for the following measurements Write Precompensation A write precompensation can be performed for Agilent E5022 E5023 it is a three bit off the target bit this could either be pre target bit or post target bit This function actually delays the time to write the data There are three types of timing delay for precompensation ...

Page 309: ...under test and spindle speed When typical TAA and PW length values for an isolated pulse measurement are known the approximate value of the input signal and pulse width can be calculated from to the principle of superposition Typical TAA and PW length values can be set by the hpe5022_isolatedPulseReference function Also the Agilent E5022 E5023 has an auto configuration function that sets an isolat...

Page 310: ... Configuration 1 Chapter Title 2 Chapter Title 3 Chapter Title 4 Chapter Title Measurement Definition Figure 5 55 Relation between Input Range Auto Configuration Functions Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 311: ...opts an X Y stage the Agilent E5022 E5023 simulates the real drive by changing the head position and head skew angle depending on the specified track number Parameters are required to achieve this simulation and Agilent E5022 E5023 provides two ways to achieve this 1 The first way is to specify the dimensions of the spindle center pivot and reference point Refer to Figure 5 59 on page 313 for the ...

Page 312: ...ese parameters in determining skew angle with respect to radius r The radius between spindle center and reference point skew The skew angle created relative to the reference point It is also defined as the angle formed when the head is not perpendicular to the spindle Pivot point Rotating axis of the pivot arm PC Pivot to Center is the distance from pivot point to spindle center PG Pivot to Gap is...

Page 313: ...blish the following equations Equation 5 29 Using the Law of Cosine From the given illustration we can see that radius r is perpendicular to tanget line a b Thus solving for skew angle we can subtract angle A from the right angle Equation 5 30 By substituting equation 4 16 to 4 17 we can prove equation 4 18 Equation 5 31 PC2 PG2 r2 2rPG A cos Ð skew 90 A Ð skew 90 r2 PG2 PC2 Ð 2rPG acos Ð Artisan ...

Page 314: ...HGA Dimension To prevent contact with the spindle and other objects A proper configuration of the HGA dimension and its reference head position reference point has to be established When the write track offset is set at zero 0 the reference point will be located at the center of the track during a write sequence When the read track offset is set at zero 0 the reference point will be located at the...

Page 315: ... will occur In this case the DLL Dynamic Link Library for the cassette must be installed Inhibit Area Margin An inhibit area or marginal distance has to be specified to keep the head and cassette from bumping into the spindle Parameters are set by the hpe5022_inhibitMargin function This value is set at 1mm in the VEE Demo program Figure 5 60 Inhibit Area Margin Data Area The number of tracks and t...

Page 316: ...eter setting can be done by the hpe5022_headLoadConfig programming function The advanced head loading configuration is also available This function allows you to set the spindle rotation speed and head load position where the head is loaded or unloaded Parameters such as load rpm load radius load skew initial radius initial skew unload rpm unload radius and unload skew are specified in this functi...

Page 317: ...he measurement sequence in order to read the data To read the data the head should move automatically to its reading position as specified by the read track offset Read track offset can be set either before or after the drive on state To set the parameter use the hpe5022_readTrackOffset programming function Track No The head is moved to the specified track number and sets the skew angle automatica...

Page 318: ...ching the written track 3 Fine tune first step see Figure 5 62 Using the skew 0 coordinates obtained by the rough tune and start radius data move the head to the three positions skew 0 3 3 on the track determine the accurate coordinates of the three positions by searching the trace and calculate spindle center coordinates 4 Fine tune step 1 see Figure 5 62 Using the spindle center coordinates obta...

Page 319: ...m NOTE Available setup ranges for positive skew angles step 1 positive and step 2 positive and negative skew angles step 1 negative and step 2 negative are 3 0 to 30 0 and 3 0 to 60 0 respectively Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 320: ...t data 1 Determine the P1 X1 Y1 coordinates at Skew q1 2 Determine the P2 X2 Y2 coordinates at Skew q2 3 Determine the P3 X3 Y3 coordinates at Skew 0 The X Y coordinates of the spindle center can be computed mathematically relative to points P1 P2 and P3 As an example it is important that we determine points P1 P2 and P3 coordinates at the track center of radius R as accurately as possible since t...

Page 321: ...320 Chapter5 Measurement Definition Auto Alignment Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 322: ...r Title 3 Chapter Title 4 Chapter Title 5 Chapter Title 6 Specifications This chapter describes the specifications of Agilent E5022 E5023 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 323: ...bps 750 Mbps Opt 002 E5037B 50 Mbps to 1 Gbps Data Pattern HF LF Isolated Pulses ISOL Overwrite HF Overwrite LF User Defined Repetitive Pattern nT Pseudo Random Patterns 2x 1 x 3 to 10 NLTS Test Pattern 5th harmonic method 100000011000000 Reference Pattern for NLTS 15T User Defined Patterns 128 Kbits max repetitive Table 6 2 Compensation Level 3 level Pattern Selection 3 bits preceding following M...

Page 324: ...p p isolated pulse Reference Clock 1M to 100 MHz TTL Level Measurement Data 128 kByte max Segment 8 Segment max Bit Error Rate 1 109 Number of Sectors track 1 024 Sectors Number of Symbol Error Count 65 536 Symbols max Error Memory Record the error codes and offset address values for up to 65 536 symbols Symbol Error Length Histogram 65 536 counts for the length 1 to 10 Table 6 5 Temperature 23 5C...

Page 325: ...0 mm H Necessary working space about 2 m 1 5 m Table 6 8 Parameters TAA TAA TAAp p TAA asymmetry Modulation TAA Raw data Amplitude Level at every 5µsec Data Pattern HF LF ISOL Absolute Measurement Accuracy For sinusoidal wave Agilent E5038A input 6 3 Typical For any waveform Agilent E5038A input 5 Typical Table 6 9 Parameters Amplitude of the basic frequency contents of the read back signal rms Da...

Page 326: ...racy 10 of reading 150 psec 5 150 psec typical Table 6 10 Table 6 11 Parameters Baseline Baseline Average Baseline separation Data Pattern Isolated Pulse Measurement Accuracy 5 of TAAp p Input Range Signal Level Table 6 12 Parameters Resolution TAAHF TAALF 100 Accuracy 10 Typical Table 6 13 Parameters NLTS Leveltest Levelreference 100 Accuracy 2 Table 6 14 Parameters Overwrite dB LevelLF LevelOW d...

Page 327: ...A NB TAA PW BL Overwrite NLTS Sense Current Sweep MR Bias Saturation TAA NB TAA PW BL Overwrite NLTS Write Frequency Sweep Roll off Channel Bit Rate Sweep Roll Off TAA NB TAA Channel Bit Rate Sweep TAA NB TAA PW Overwrite NLTS Write Pre compensation Sweep only 1 level NLTS Head Position Sweep Track Profile TAA NB TAA Table 6 20 Parameters TAA TAA TAAp p TAA asymmetry HF TAA TAA TAAp p TAA asymmetr...

Page 328: ...h segment Table 6 23 Number of Segment per one track 1 to 100 segments Maximum number of segment s per one track depends on Write Read time settings and spindle rotation speed Total Segments 1 to 10 000 segments Parameters E5038A Histogram by 20 MHz sampling E5041A Error Counts Table 6 24 Parameters Write track width Read track width Read Write offset Maximum TAA Squash Ratio OTRC Squeezed OTRC Ta...

Page 329: ...rror Test Module OTC Measurement 747 Measurement Channel Resister Sweep Measurement Channel Quality Monitor Function Automatic Channel Optimization Function S N ratio by auto correlation method Table 6 25 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 330: ... 50 Mbps to 1 5 Gbps Arbitrary patterns 1 kbps resolution Edge Accuracy 10 ps typical 1 5 Gbps E5043A 15 ps typical 1 5 Gbps E5043B E5023A 426 2 6 Gbps Data Rate Option Channel Bit Rate 50 Mbps to 2 6 Gbps Arbitrary patterns 1 kbps resolution Edge Accuracy 10 ps typical 2 6 Gbps E5043C Data Pattern HF LF Isolated Pulses ISOL Overwrite HF Overwrite LF User Defined Repetitive Pattern nT Pseudo Rando...

Page 331: ...65 536 symbols Symbol Error Length Histogram 65 536 counts for the length 1 to 10 Table 6 29 E5039C Bit Error Rate Measurement Module Optional Data Rate 50 Mbps to 2 6 Gbps depends on the Data Rate of a PRML chip Data Pattern Arbitrary 4 kBytes 4 segments Input Signal Level 400 mVp p isolated pulse Bit Error Rate Range 1 10 9 Number of Sectors track 1 024 Sectors Number of Symbol Error Count 65 53...

Page 332: ...ude Measurement Table 6 30 Warm up Time 30 min Table 6 31 Temperature 23 5 C Humidity 15 to 80 RH Non condensation Table 6 32 Number of plugs 2 in case the system is rack mounted Voltage 100 120 220 230 240 V 10 Frequency 50 60 Hz Table 6 33 Measurement Bay 600 mm W 905 mm D 2020 mm H Necessary Working Space About 2 m 1 5 m Table 6 34 Parameters TAA TAA TAAp p TAA asymmetry Modulation TAA Raw data...

Page 333: ...rms Data Pattern HF LF Isolated Pulse Repetitive NLTS 5th User defined pattern Dynamic Range 70 dB Table 6 36 Parameters PW PW Average PW asymmetry Measurement Range 1 5 nsec to 35 nsec Data Pattern Isolated Pulse Range of PW PWxx PW20 to PW80 Absolute Measurement Accuracy 10 of reading 50 psec 5 50 psec typical Table 6 37 Parameters Baseline Baseline Average Baseline separation Data Pattern Isola...

Page 334: ...uracy 10 Typical Table 6 38 Table 6 39 Parameters NLTS Leveltest Levelreference 100 Accuracy 2 Table 6 40 Parameters Overwrite dB LevelLF LevelOW dB Accuracy 0 2 dB Table 6 41 Parameters S N dB Peak Detected TAA rms Noise dB or Signal rms Noise dB Table 6 42 Parameters S N dB Signal rms Noise dB Table 6 43 Parameters Power dBm Table 6 44 Parameters SHNR dB Table 6 45 Write Current Sweep Write Curr...

Page 335: ...p Track Profile TAA NB TAA Table 6 45 Table 6 46 Parameters TAA TAA TAAp p TAA asymmetry HF TAA TAA TAAp p TAA asymmetry LF Resolution TAA TAA TAAp p TAA asymmetry Isolated Pulse PW PW PW average PW asymmetry Resolution Table 6 47 Measurement Parameters Read track width Write track width Table 6 48 Number of Segment per one track 1 to 80 segments Maximum number of segment s per one track depends o...

Page 336: ...ds on Write Read time settings and spindle rotation speed Total Segments 1 to 10 000 segments Parameters E5038A Histogram by 20 MHz sampling E5041A Error Counts Table 6 50 Parameters Write track width Read track width Read Write offset Maximum TAA Squash Ratio OTRC Squeezed OTRC Table 6 51 Analysis Average the data over the repetitive cycle of data pattern For HF LF and Isolated Pulse patterns TAA...

Page 337: ...y 15 µm 600 µ Skew Range 30o max 60o min Table 6 53 Stage Type Piezo translator operated flexure substage Stage Travel 15 µm 600 µ Travel Resolution 2 5 nm 0 1 µ Position Accuracy 50 nm 2 µ Position Repeatability 5 nm 0 2 µ 1 σ Table 6 54 RPM 1 000 to 15 000 rpm RPM Accuracy 0 1 3 000 rpm RPM Jitters 0 01 3 000 rpm Asynchronous Rotational Error 1 µ axial radial 3 000 rpm Asynchronous Position Jitt...

Page 338: ...Supply Requirements Vacuum Requirements Motor Brushless DC programmable Table 6 54 Table 6 55 Pressure 724 kPa min 827kPa max 105psi min 120psi max Flow 0 00048 1 02scfm min m 3 s Table 6 56 Pressure 70 kPa min 20 5 inHg Flow 0 00022 0 47 scfm min m 3 s Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 339: ...1 C Skew Range 30 to 30 Table 6 58 Stage Type Piezo translator operated flexure substage Stage Travel 15 µm 600 µ Travel Resolution 1 7 nm 0 07 µ Positioning Repeatability 1 7 nm 0 07 µ 1 σ 1 µm Asynchronous Positioning Jitter 1 7 nm 0 07 µ 1 σ 15 000 rpm Table 6 59 RPM 1 000 to 20 000 rpm RPM Accuracy 0 0005 15 000 rpm typical RPM Jitters 0 0025 15 000 rpm typical Asynchronous Rotational Error 1 ...

Page 340: ...nstand and Fan on the Cover Voltage 100 120 220 230 240 V 10 Frequency 50 60 Hz Table 6 62 Pressure 724 kPa min 827kPa max 105psi min 120psi max Flow 0 00048 1 02scfm min m 3 s Table 6 63 Pressure 70 kPa min 20 5 inHg Flow 0 00022 0 47 scfm min m 3 s Table 6 64 Spinstand Size and Weight w o Cover 600 mm W 760mm D 1020 mm H approximately 300 kg Spinstand Size and Weight with Cover 700 mm W 850mm D ...

Page 341: ...340 Chapter6 Specifications E5010C Spinstand Specifications Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 342: ...ated firmware versions or configurations of the Agilent Technologies E5022A B and E5023A The information in this manual applies directly to an Agilent Technologies E5022A B or E5023A whose firmware software revision is listed on the title page of this manual Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 343: ...m Revision B 03 10 Changes in Revision B 04 00 from Revision B 03 10 Add 3 GHz spectrum measurement capability option E5023A 300 s information Update products information Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 344: ... 02 50 1 Chapter Title Manual Changes 3 Chapter Title 4 Chapter Title 5 Chapter Title Changes in Revision B xx xx from Revision B 02 50 See the readme htm and readme_config htm files Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 345: ...lt as the head load type The ramp load function is supported which is available only in the E5010C E5013A spinstand with the ramp loading mechanism In the VEE measurement program it is available to set the Ramp as the head load type and to set the ramp load related parameters In addition the ramp load positioning utility is added in the Agilent Hard Disk ReadWrite Test System group which is a tool...

Page 346: ...02 00 1 Chapter Title Manual Changes 3 Chapter Title 4 Chapter Title 5 Chapter Title Changes in Revision B 02 20 from Revision B 02 00 The SNR Triple Track Test function has been added Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 347: ...Revision B 01 10 Changes in Revision B 02 00 from Revision B 01 10 See the readme htm file Select windows start menu Programs Agilent Hard Disk ReadWrite Test System README Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 348: ... is stored into PC at the factory shipment The value is the same for all systems as far as the provided cables are used Generally user don t care about this 2 Supports E5029K head amplifier The method to set the head amplifier control has been changed In case of the E5029H J the head amplifier property method is adapted In case of the E5029K users can set the values at any register in the head amp...

Page 349: ...on B 01 00 01 1 The function stops the spindle rotation with clamping the media has been added hpe5022_motorStateEx 2 The TMR and Randomize Track Profile measurements have been added in the VEE measurement program as a service function Bug Fixes 1 When the hpe5022_headPosition function was executed while spindle was not rotating the cassette face was not detected properly 2 In case of the E5010C a...

Page 350: ... is stored into PC at the factory shipment The value is the same for all systems as far as the provided cables are used Generally user don t care about this 2 Supports E5029K head amplifier The method to set the head amplifier control has been changed In case of the E5029H J the head amplifier property method is adapted In case of the E5029K users can set the values at any register in the head amp...

Page 351: ...Opt H36 E5022 66536 Bug Fixes 1 When the hpe5022_headPosition function was executed while spindle was not rotating the cassette face was not detected properly 2 In case of Amplifier On Cassettes the head could not be located at the area over radius 45mm Changes at Revision A 04 30 04 1 The following cassette is supported E5029D Opt 012 E5010 61321 61322 VM8020 FIC 2 The following cassette s DLL is...

Page 352: ...uto alignment might fail Unknown Error 0xbffc0d12 was displayed 3 The setting menus of the following head amplifiers were not displayed in the VEE measurement program E5029H Opt H33 E5022 66533 VM8020 E5029H Opt H34 E5022 66534 CXA3541N 4 The hpe5022_idn_Q function did not return the system serial number 5 The spectrum SNR measurement result at 1MHz RBW on the E5040A was not correct Changes at Rev...

Page 353: ...u can move it even if the drive is turned off This mean you can move the piezo even if the head is at the home position Bug Fixes 1 The dll file for the E5029J Opt 107 head amplifier was not installed at revision A 04 30 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 354: ...sation function has been added This function allow you to stay the read head at a positon which has offset from the track center 2 A capability to locate a head and load unload at the outside of a media has been added 3 A capability to change the head movement speed has been added 4 The channel optimization without an erase and or a write has been added 5 Supports the E5029J Opt 190 E5022 66109 E5...

Page 355: ...head due to a spike current However this function sometimes causes the trouble of the write current shutdown The property of hpe5022_HAP_PROP_xxxxx_ACCMD has been added Changes at Revision A 04 20 03 1 Supports the following head amplifiers E5029H Opt H32 E5022 66532 VM8020 E5029J Opt 627 E5022 66627 E5022 66628 Mercury 2 Supports the following cassettes E5029C Opt C21 E5010 61168 E5029C Opt 009 E...

Page 356: ... values of hpe5022_BER_CIC_MS452A_PROP_FIR property has been modified 4 In the Option P22 the property of hpe5022_BER_CIC_88C5200_PROP_FIR_COEF_MODE has been added Bug Fixes 1 The hpe5022_trackOffsetCompPatternAuto function This function determines the frequency the offset and aperture time of the burst pattern automatically Until the previous revision a narrow band TAA roll off measurement was us...

Page 357: ...J Opt 217 E5022 66217 E5022 66218 VM8020 Note VM802010BXD1 is supported and VM802010BXB1 is not supported Bug Fixes 1 Symptom In the cassette of E5029D Opt 009 E5010 61291 E5010 61292 the cassette might contact with the shroud Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 358: ... erase for several revolutions 2 The sense current polarity functions has been added This function allows you to change the sense current polarity on write sequence Some head amplifiers does not have this capability 3 The track offset compensation function has been added The function allows you to compensate the head position by reading the burst pattern In VEE program only the track profile measu...

Page 359: ...07 E5022 66108 SR1759 2 Changes at Revision A 04 10 02 1 The following bug is fixed Symptom When click on Head Amp Config under Setup Configuration on the VEE program only installed head amplifier s part number and its serial number are displayed and you can not set the control parameters such as gain bias and overshoot This is happen on head amplifiers which has a property function except E5029J ...

Page 360: ...owing Cassettes E5029C Opt 019 E5022 61163 E5022 61164 E5029C Opt 020 E5022 61165 E5022 61166 2 Supports the E5011A small profile spinstand 3 The following measurements are added Side Erase Side Reading 4 In stability measurements the Skip Erase Write sequence can be selectable 5 In a micro track the minimum step is changed from 50 nm to 1 nm Artisan Technology Group Quality Instrumentation Guaran...

Page 361: ...219 E5022 66210 VM8030 E5029J Opt 221 E5022 66221 E5022 66222 VM8030 E5029J Opt 607 E5022 66607 E5022 66608 SR1760 2 E5029J 002 E5022 66002 Buffer Board for Amp on Cassette has the serial number JP1KI00157 and below are not supported Contact to Agilent if you have the Buffer Board 3 In Bit Error Measurement the Adjacent Track Pattern can be determined hpe5022_BER_adjacentTrackPattern hpe5022_BER_a...

Page 362: ...measure a Squeeze OTRC a Measure one track profile b Plot the imaginary track profiles at both side of the measured track profile In other words the both side of track profiles are copies of the measured track profile c Calculate Squeeze OTRC by two imaginary track profiles The following things have been changed in the calculation of Squeeze OTRC and plotting imaginary track profiles Squeeze OTRC ...

Page 363: ... AppendixA Manual Changes Changes in Revision A 04 00 from Revision A 03 81 04 Figure A 1 Changes on Squeeze OTRC Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 364: ...ounded to the step of track profile measurement as shown in Figure A 2 On revision A 03 81 04 and below the right imaginary track profile position is rounded at Equation A 2 Right Imaginary Track Profile Position in Revision A 03 81 04 and below On revision A 04 00 and above the right imaginary track profile position is rounded at Equation A 3 Right Imaginary Track Profile Position in Revision A 0...

Page 365: ...ppendixA Manual Changes Changes in Revision A 04 00 from Revision A 03 81 04 Figure A 2 Changes on Squeeze Profile Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 366: ...l number JP1KI00158 and above must use this revision or above 2 For E5029H Opt H30 E5022 66530 a capability to measure a write DCR is added Changes in Revision A 03 81 02 from Revision A 03 81 01 1 Supports the following Head Amplifiers E5029H Opt 024 E5022 66524 M61871BFP E5029H Opt 029 E5022 66529 HDL6D002 E5029H Opt 030 E5022 66530 S3146 47 2 Supports E5039A option P22 3 When the hpe5022_setupX...

Page 367: ... result is not good After one bad measurement result the result becomes good if the interval is less than about 1 minute Cause At the revision 3 81 and below the SR1750 was set at IDLE mode at unload position This causes the problem At this service release the SR1750 was set at SLEEP mode at unload position Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Page 368: ...VEE program the following parameters have been added and or modified The following spindle speed limitations must be taken into account when the user specifies the RPM parameter in the Setup menu When RPM is set below 2400 the system will automatically set the spindle speed to 2400 rpm When RPM is set above 2400 then the user s specified spindle speed will be used Refer to the hpe5022_measureStabi...

Page 369: ...Endec has been removed from the Ch Quality Measurement menu of BER The parameter Ch Qual Config has been added in the Ch Quality Measurement menu of BER This parameter depends on each read channel IC The parameter Ch Qual Config has been added in the Optimize menu of BER This parameter depends on each read channel IC The parameter Save Trace has been added in the CBR Sweep RollOff and Track Profil...

Page 370: ...s The parts number and serial number of the installed head amplifier can be shown in the Head Amp Config menu When you click on About Agilent Technologies E5022A the parts number and serial number of the head amplifier board will be reported If the BER module is installed in the system the name of its read channel IC will also be reported Artisan Technology Group Quality Instrumentation Guaranteed...

Page 371: ...ogram the following parameters have been added and or modified The parameter Acceleration has been added in the Spinstand menu This parameter allows the user to change the acceleration of the spindle rotation in order to avoid disk slip The minimum skew angle setting in the Setup and Advanced Head Load Configuration menu has been increased from 30 to 60 degrees The maximum and minimum number of re...

Page 372: ...are Rev 3 50 supports this new popcorn noise test when you install E5041A The Absolute Polarity measurement has been modified The user can specify his own data pattern by setting the Pattern Mode parameter to User Mode Fast Auto Alignment Program the auto alignment program has been modified for faster alignment It takes approximately 5 minutes to complete the alignment compared to its previous ver...

Page 373: ...erns are displayed in MHz except for PRBS and User Define in the Pattern Config menu For Stability Measurement of TAA PW the number of sectors segments per track has been increased from 5 to 80 sectors More user defined write patterns were added three additional patterns for each Repetitive and User Defined pattern Refer to the programming manual for details Shroud Interlock the spindle stops when...

Page 374: ...ade software Rev3 21 to Rev3 30 Importing the library and including declaration file for software Rev3 30 and later revisions When you update the system software the new destination directory for Rev 3 30 will be C Program Files Agilent E5022 In line with this the set PATH of the autoexec bat will be changed In addition the path name of the import library of E5022A VEE will also be changed Before ...

Page 375: ...m Files Agilent E5022 lib should be linked You need to change the path setting of the include LIB files in the development environment for software Rev3 30 When downgrading Rev3 30 to software Rev3 21 and earlier revisions Since you can not use both Rev3 30 and Rev3 21 at the same time i e it can not co exist When you downgrade software Rev3 30 to software Rev3 21 and earlier revisions you need to...

Page 376: ...ulation has been added as a measurement result For Spectrum Measurement and Spectral SNR Measurement the video band width VBW is added as a parameter The customer designed cassettes can be used by setting the dimension of the cassette The format of store restore is changed so that all parameters can be saved As file format is retrievable you can restore files saved from the previous revision It is...

Page 377: ...For Triple Track Measurement the data pattern for adjacent track can be selected Also DC and AC data patterns can be selected as erase pattern For the spectrum analyzer the display can be turned on which allows you to observe the measurement waveform The function of the read write offset is set automatically after the head movement This has been added in the setup menu When this function is turned...

Page 378: ...mproves the accuracy of the auto alignment For VEE program the following measurements have been added BER Measurement Functions Spectrum Measurement Functions Spectral SNR Measurement Functions The maximum value of Max Track in the spinstand menu is changed from 20 000 to 1 000 000 The maximum value of segment in the popcorn measurement menu is changed from 5 to 10 Artisan Technology Group Quality...

Page 379: ... and Triple Track Profile measurement This function is in VEE Demo Program only Auto TAA Range function is added on the TAA Track Profile and Triple Track Profile measurement Meas Type function is added for TAA PW Baseline Waveform Analysis Narrow band TAA and SNR measurements The triple track profile measurement is changed as follows Performing the three track erase process is selectable The valu...

Page 380: ...Chapter Title B Error Messages This appendix describes possible error messages that will appear on the PC monitor and LCD display of the spinstand when you operate Agilent E5022A Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 381: ...er board was corrupt Need to perform the calibration again hpe5022_ERROR_CAL_FAILED Calibration is failed Check the configuration and cabling then re try the calibration hpe5022_ERROR_CLOSE Unable to close some components instruments and the spinstand hpe5022_ERROR_CONFLICT_PREC_PATTERN The precompensation pattern has conflict hpe5022_ERROR_D50_NOT_FOUND Can t find the D50 parameter point Check th...

Page 382: ...r HGA cassette is missing or the selected hardware is not installed Check if they are placed properly hpe5022_ERROR_INACCURATE_BER Too many Bit Error Rate happens and measurement result is not correct Need to optimize the measurement hpe5022_ERROR_INTERNAL Unexpected internal error occurred hpe5022_ERROR_INTERLOCK The spinstand is out of air or vacuum or emergency switch has been turned on Check i...

Page 383: ...ng is invalid in the BER measurement Check your program hpe5022_ERROR_INV_ID The handle ID is invalid Check if the handle ID in your program is correct hpe5022_ERROR_INV_PARAMETER The parameter is out of range hpe5022_ERROR_INV_POSITION The specified head position is in the inhibit area Check the HP part number of cassette the inhibit area the HGA dimension the data area and the specified track nu...

Page 384: ...k sum error occurred in the calibration data or user data hpe5022_ERROR_MICRO_TRACK_FAILED Failed to create a micro track The measured TAA level did not reach the specified level Check the parameters for micro track measurement hpe5022_ERROR_MOTOR_FAULT An error is detected in the motor or servo of the spinstand Check the spinstand and restart the system hpe5022_ERROR_NO_OPTION An option is not in...

Page 385: ...22 bin If there is no the DLL file update the E5023A software or contact Agilent Technologies for DLL file hpe5022_ERROR_NSUP_HGA_CASSETTE The specified HGA cassette type is not supported Check the specified Agilent Parts number If it is correct check if the DLL file named Agilent cassette s part number is in the directory of c Program Files Agilent E5022 bin If there is no the DLL file update the...

Page 386: ...acquisition parameters are invalid for an oscilloscope Reduce the value of the over sampling rate the wave averaging factor or the channel bit rate hpe5022_ERROR_PEAK_NOT_FOUND The peak can t be found in the track profile result Check if the track profile is performed properly hpe5022_ERROR_PES_DATA Effective position error signal data can not be measured hpe5022_ERROR_PLL_UNLOCK The PLL is unlock...

Page 387: ... is not completed in UDS Check your program hpe5022_ERROR_SEQ_NOT_SETUP Sequence is not set up in UDS Check your program hpe5022_ERROR_SHROUD_OPEN The shroud cover is open Close the shroud cover when the drive is on hpe5022_ERROR_SPINSTAND_SPECIFIC Detected the spinstand specific errors hpe5022_ERROR_STAGE_INHIBIT_POS The target position of a head is set in the inhibit area on the media hpe5022_ER...

Page 388: ...ck offset compensation is failed Check if the all measurement conditions are correct hpe5022_ERROR_UNAVAILABLE_PINNO Unavailable pin number is assigned for the S S TTL I O Check the available pin number hpe5022_ERROR_UNDERFLOW An underflow is detected in the parametric module Perform the auto configuration input range or check if the setting parameter is correct Error Messages on PC Monitor Displa...

Page 389: ...ault Axis 1 3 The encoder of X or Y stage is over the limit Reset the spinstand Amp Fault Axis 1 3 or 5 Amplifier could be in malfunction Contact the Agilent Technologies office Encoder error Axis 1 3 or 5 The encoder might be in malfunction Contact the Agilent Technologies office Air Interlock Fault The spinstand is out of air or vacuum or emergency switch has been turned on Check if air or drawn...

Page 390: ...sages that could appear when Auto Disk Alignment is performed Table B 1 Error Message at Auto Disk Alignment Error Message Description Can t converge the track position The starting position is wrong or the X Y positioning could be inaccurate Retry the auto disk alignment If it fails again contact the Agilent Technologies service center Artisan Technology Group Quality Instrumentation Guaranteed 8...

Page 391: ...390 AppendixB Error Messages Error Messages of the Auto Disk Alignment Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 392: ...and Z Height 5 Chapter Title Adjustment C Cassette and Z Height Adjustment This appendix provides the information about the cassette and its Z Height Adjustment for E5022A B Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 393: ...tool The Z height Adjustment tool is included in the Agilent E5029C Option Zxx xx represents a two digit number Figure C 1 Z height adjustment tool 2 Select one of the three pin holes that will be used to measure the cassette s Z height as shown in Figure C 2 and Figure C 3 NOTE The location of the needle pin of the Z height tool i e short medium or long should match the length of the HGA Mount bl...

Page 394: ...hen select the pin hole to be used for measurement as shown in Figure C 3 Figure C 3 Needle Pin Position 4 Rotate the micrometer knob downwards to keep needle pin away 5 Attach the zero gauge cassette shown in Figure C 4 on the Z height adjustment tool completely The user can use either sides i e down face or up face of the tool as long as the locking pin of the cassette is compatible with the doc...

Page 395: ...Refer to Figure 3 3 Cassette Parameter Setup Menu 6 Rotate the micrometer knob upwards until the needle pin touches the contact block of the zero gauge cassette as shown in Figure C 5 7 Check the LED of the Z height tool When the needle pin touches the contact block the LED will turn on At this stage stop rotating the micrometer knob 8 Push the ZERO ABS button to set the zero height value to zero ...

Page 396: ...se of inch R Read setting inch Z Z height inch T disk thickness inch 11 Before attaching the cassette to be adjusted slightly loosen the pin and the hexagonal screws located on top of the cassette as shown in Figure C 6 i e magnified view To adjust the pin screw use a 0 89 mm or 0 035 hex screwdriver to adjust the hexagonal screw use a 1 5 mm hex screwdriver NOTE When working on step 10 DO NOT ATT...

Page 397: ... of the cassette as shown in Figure C 6 until the Z height is almost at its highest position Use a slotted screw driver 13 Attach the cassette to the Z height adjustment tool as shown in Figure C 7 Figure C 7 Attaching the Cassette 14 Slowly tighten the flat screw until the LED turns on Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 398: ... Figure C 8 Measuring the Z height of the Cassette 15 Carefully tighten up the pin screw and the hexagonal screw to fix the Z height position NOTE When you tighten up the hexagonal screw upper the torque of the driver must be 0 1N m 1 Kgf cm 16 Remove the cassette from the Z height adjustment tool Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 399: ...gure C 9 use a 2 5 mm hex screwdriver to loosen the hexagonal screw that locks the micrometer Figure C 9 Removing the micrometer Table C 3 Required Tools Tools Size Hex Screwdriver 2 5 mm Hex Screwdriver 2 0 mm Cutting Pliers Slotted Screwdriver Coin Table C 4 Required Parts Parts Part Number Qty Button type battery 1 55V commercially available SR44 LR44 1 Lithium battery 3V 1420 0338 1 Cable tie ...

Page 400: ...ry SR44 or LR44 This battery is commercially available Typically this battery lasts for one year 4 Replace the battery cover by turning it clockwise using a slotted screwdriver or coin 5 Turn the Z height tool down face and remove 6 hexagonal flat screws from the bottom cover of the Z height tool using 2 mm hex screwdriver as shown in Figure C 10 Figure C 10 Removing the bottom cover 6 Unscrew 3 h...

Page 401: ...ct polarities when you replace the battery 9 Wrap the battery with a cable tie cable tie part number 1400 0249 10 Replace the pc board to its original location as in Figure C 11 11 Screw 3 hexagonal round screws using 2 mm hex screwdriver 12 Replace the bottom cover into the Z height tool housing 13 Screw 6 hexagonal flat screws using 2 mm hex screwdriver 14 Replace the micrometer into the slot of...

Page 402: ...cassette you must set the length of the HGA mount block assembly This length can be adjusted into three different settings i e short medium or long as shown in Figure C 12 2 Remove the two screws as shown in Figure C 12 using a 1 5 mm hex screwdriver 3 Slowly tighten up the screws after setting the desired length of the FIC block NOTE The location of the needle pin of the Z height tool i e short m...

Page 403: ...pendixC Cassette and Z Height Adjustment Adjusting the FIC length Figure C 12 Adjusting the HGA Mount block assembly Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 404: ...hanged on some cassettes This procedure shows the E5029C option C11 type Other cassettes have the same replacement procedure 1 Set the stopper of the block assembly relative to the type of head to be used for measurement Figure C 13 FIC block disassembly Table C 6 Required Tools Tools Size Hex Screwdriver 1 5 mm Hex Screwdriver 0 71 mm Long Nose Pliers Artisan Technology Group Quality Instrumentat...

Page 405: ...m the block assembly 3 Loosen the lock pin screw using a 0 71 mm 0 028 hex screwdriver 4 Loosen the stopper screw using a 0 71 mm 0 028 hex screwdriver 5 Remove the lock pin using a long nose pliers 6 Attach the type of stopper to be used either QM QS or Q30 type 7 Insert the lock pin The lock pin is slightly protruded outside the assembly 8 Slowly tighten up the lock pin screw and stopper screw u...

Page 406: ... 4396B D Measurement Using 4396B This appendix provides the information when you make a measurement using high frequency spectrum analyzer 4396B Users can use their own 4396B in order to make a high frequency spectrum measurements Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 407: ...Roll Off Measurement for Narrow Band TAA NOTE When the system has the optional E4402B 3GHz spectrum analyzer the 4396B can not be used on the system 4396B Connection Figure D 1 shows the connection of 4396B When your system does not have E5039A B C connect the Out 2 port on E5036A with the S port on 4396B However when your system has E5039A B C the port is used In this case you have to swap one of...

Page 408: ...Cable E5035A Trig Out 2 4396B ExtTrigger E5022 61613 BNC m BNC m Cable 4395A Ext Ref Output 4396B Ext Ref Input E5022 61613 SMA m SMA m Cable E5036A Filtrd Out 2 or E5036A Filtrd Out 1 4396A Input S E5022 61623 SMA m N m Adapter 4396A Input S 1250 1250 BNC Tee m f f Adapter E5035A Trig Out 2 1250 0781 1 1 When your system has E5039A B C the adapter Part Number 21900 made by Amphenol Corpo ration i...

Page 409: ... Spectrum CBR Sweep Roll Off When you create a program by yourself the resource name of 4396B must be added in hpe5022_init function See the programming manual for detail The functions for 4396B measurement are described in the chapter 5 of the programming manual NOTE Once you change the setting of 4396B after pressing local button on its front panel in order to observe your desired measurement th...

Page 410: ...Z Height E Module Head Amp Cassette Filter Lists E Module Head Amplifier Cassette Filter Lists This appendix provides the information of head amplifiers cassettes and filters Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 411: ...rement Module B 01 00 and above E5039A 1 P10 Bit Error Test Module A 03 30 and above P11 A 03 30 and above P12 A 03 40 and above P13 P14 A 04 20 and above P20 A 03 30 and above P21 A 03 30 and above P22 A 03 81 02 and above P30 A 03 30 and above E5039B 1 All Bit Error Test Module B 01 00 and above E5039C All Bit Error Test Module B 02 50 and above E5040A Spectrum Measurement Module A 04 10 and abo...

Page 412: ...p Cassette Filter Lists E5010B 1 Spinstand A 01 00 and above E5011A 1 Small Profile Spinstand A 04 10 and above E5010C 1 High TPI Spinstand B 01 00 and above E5013A High TPI Small Profile Spinstand B 01 00 and above 1 Obsolete Table E 1 Supported Revision for Each Module Module Opt Description Supported Revision Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisant...

Page 413: ...03 10 and above C06 E5010 61151 E5010 61152 A 03 10 and above C07 E5010 61133 E5010 61134 All Revision C08 E5010 61153 E5010 61154 A 03 10 and above C09 E5010 61141 E5010 61142 All Revision C11 E5010 61145 E5010 61146 A 03 30 and above C15 E5010 61157 E5010 61158 A 03 30 and above C16 E5010 61159 E5010 61160 A 03 60 and above C18 E5010 61161 E5010 61162 A 03 60 and above C19 E5010 61163 E5010 6116...

Page 414: ...on Number Z Height Tool Part Number SupportFirmware Revision 001 E5010 61211 E5010 61212 Z01 E5010 61531 A 03 70 and above 002 E5010 61221 E5010 61221 Z02 E5010 61532 A 03 70 and above 003 E5010 61231 E5010 61232 Z03 E5010 61531 A 03 81 and above 006 E5010 61261 E5010 61262 Z06 E5010 61533 A 03 81 and above 008 E5010 61281 E5010 61282 Z08 E5010 61532 A 04 00 and above 009 E5010 61291 E5010 61292 Z...

Page 415: ...Firmware Revision 001 E5012 60011 E5012 60012 500 B 01 00 and above 002 E5012 60021 E5012 60022 501 B 01 01 and above 003 E5012 60031 E5012 60032 500 B 01 01 and above 004 E5012 60041 E5012 60042 500 B 01 00 and above 005 E5012 60051 E5012 60052 500 B 01 00 and above 006 E5012 60061 E5012 60062 500 B 01 10 and above 007 E5012 60071 E5012 60072 500 B 01 10 and above Artisan Technology Group Quality...

Page 416: ...above H16 E5022 66516 A 03 60 and above H18 E5022 66518 A 03 60 and above H19 E5022 66519 A 03 50 and above H20 E5022 66520 A 03 60 and above H21 E5022 66521 A 03 50 and above H23 E5022 66523 A 03 60 and above H24 E5022 66524 A 03 81 02 and above H25 E5022 66525 A 03 60 and above H26 E5022 66526 A 04 00 and above H28 E5022 66528 A 03 70 02 and above H29 E5022 66529 A 03 81 02 and above H30 E5022 6...

Page 417: ...plifiers 002 E5022 66002 For commercial head amplifiers 003 E5022 66003 For SSI 833 004 E5022 66004 For commercial head amplifiers for the thermal drift performance improved cassette 1 1 The thermal drift performance improved cassette has the head think and the spacers between board and its base See the picture below Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www art...

Page 418: ...2 213 DN E5022 66213 E5010 61707 UP E5022 66214 E5010 61708 223 DN E5022 66223 E5010 61701 UP E5022 66224 E5010 61702 401 DN E5022 66401 E5010 61707 UP E5022 66402 E5010 61708 403 DN E5022 66403 E5010 61707 UP E5022 66404 E5010 61708 301 DN E5022 66101 UP E5022 66102 601 DN E5022 66601 UP E5022 66602 611 DN E5022 66611 E5010 61731 UP E5022 66612 E5010 61732 617 DN E5022 66617 E5010 61733 UP E5022 ...

Page 419: ... above UP E5022 66210 E5010 61702 103 DN E5022 66103 N A A 03 81 and above UP E5022 66104 105 DN E5022 66105 N A A 03 81 04 and above UP E5022 66106 109 DN E5022 66109 N A A 04 30 and above UP E5022 66110 107 DN E5022 66107 N A A 04 10 02 and above UP E5022 66108 627 DN E5022 66127 E5010 61715 A 04 20 03 and above UP E5022 66128 E5010 61716 Table E 8 E5029J Head Amplifiers List Opt Board P N Up Do...

Page 420: ...Lists E5029K Buffer Board Table E 9 E5029K Buffer Boards List Option Number Part Number for Onstage Buffer Board Part Number for Connection Board Description 001 E5023 66504 E5023 66505 For universal head amplifiers 002 1 1 Obsolete E5023 66506 E5023 66507 For commercial head amplifiers 004 E5023 xxxx E5023 xxxx For commercial head amplifiers Artisan Technology Group Quality Instrumentation Guaran...

Page 421: ...ver P N Up Lever P N Support Firmware Revision 101 E5023 66101 B 01 00 02 and above 201 E5023 66201 E5012 60701 E5012 60702 B 01 00 and above 202 E5023 66202 E5012 60703 E5012 60704 B 01 00 and above 203 E5023 66203 B 01 10 and above 207 E5023 66207 B 01 20 and above 209 E5023 66209 E5012 60701 E5012 60702 B 01 20 and above Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE ...

Page 422: ...36 66572 Low Pass 200 MHz F06 E5036 66577 Low Pass 250 MHz F07 E5036 66573 Low Pass 300 MHz F08 E5036 66574 Low Pass 400 MHz F09 E5036 66578 Band Pass 15 MHz F10 E5036 66579 Band Pass 30 MHz F11 E5036 66511 Low Pass 350 MHz F12 E5036 66512 Low Pass 450 MHz F13 E5036 66513 Low Pass 500 MHz F14 E5036 66514 Low Pass 160 MHz F30 E5036 66531 Band Pass 0 5 to 2 MHz F31 E5036 66532 Band Pass 3 to 80MHz F...

Page 423: ...422 AppendixE Module Head Amplifier Cassette Filter Lists E5029F Filter Board Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 424: ... Title 5 Chapter Title Compensation for E5023A F Cable Loss Compensation for E5023A This appendix provides the information about the cable loss compensation for E5023A Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 425: ...l this value Installation of the Compensation Factor Execute the program named caltool exe in order to install the calibration loss factor into the PC You can download it from the website of Service Support at the URL http dst tm agilent com 1 Execute the caltool exe program on the PC 2 The Figure F 1 is displayed The current stored value is displayed in the text box Figure F 1 Caltool Dialogue 3 ...

Page 426: ...n Board 4 Chapter Title 5 Chapter Title Maintenance G E5029K Connection Board Maintenance This appendix describes how to maintenance of the connection board Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 427: ...connection board Figure G 1 Connection Pads Cleaning the Pads To clean contamination use a cotton swab with alcohol Wipe them from the inside out as shown in Figure G 2 CAUTION Do not wipe them from the outside in This causes damage on the pads Figure G 2 Direction of Cleaning the Pads Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 428: ...imately 100 000 contacts However improper operation might damage the wire on the pad as shown in Figure G 3 This causes the short circuit between the terminals on the connection board Four sets of this are furnished with the system as spares When you need them more order PN E5029 65001 10 sets of pads Figure G 3 Damaged Connection Pad Artisan Technology Group Quality Instrumentation Guaranteed 888...

Page 429: ...two length of the connection pads as shown in Figure G 4 Figure G 4 Pad Length Step 2 Remove the connection pads from the connection board with tweezers First remove the long pads then remove the short one Figure G 5 Removing Pads Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 430: ... them with tweezers Because the pads might have been damaged by tweezers Step 3 Clean the ditchs and confirm there is no dust Step 4 Mount the new short pad on the board with fingers Do ware gloves Do not use tweezers The orientation of the pad is shown in Figure G 7 Figure G 6 Mounting the Short Pad Figure G 7 Pads Orientation Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOU...

Page 431: ...onnection Board Maintenance Connection Pad Replacement Step 5 Mount the new long pads with fingers Figure G 8 Mounting the Long Pad Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 432: ...431 H Ramp Load H Ramp Load This appendix describes how to perform a ramp load Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 433: ...ion has the a lift tab The ramp loading mechanism is installed to the media support assembly as shown in Figure H 1 NOTE At the E5022 E5023 system software revision B 02 50 and above support the ramp load Figure H 1 Ramp Loading Mechanism Picture is E5013A Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 434: ...on the media support of the E5013A spinstand If you have the E5011A spinstand you need to upgrade the E5011A to E5013A before installing it The E5013V 320 is the upgrade kit for the ramp loading mechanism which can be installed at on site In addition to install both a power supply unit and a head loading Aux controller are necessary which are ramp loading mechanism related products Artisan Technol...

Page 435: ...nt thickness one you can use the same ramp by changing the ramp plate The thickness of the ramp plate X4 as shown in Figure H 4 is defined the following equation CAUTION If the media surface is higher than tip of the ramp X1 0 the ramp hits the media CAUTION If the dimension of the ramp you made is out of standard pattern the ramp hits to the head HGA cassette or the HLM Table H 1 Ramp Plate Thick...

Page 436: ... illuminated Figure H 5 Set Switch to Ramp Plug the air fitting of TILT AIR Down Load and TILT AIR Up Load on the Aux controller as sown in Figure H 6 using an air stopper assembly WARNING The air stopper assembly and two plugs as shown in Figure H 6 are included in the Aux controller Usually plug the air fitting of TILT AIR Down Load and TILT AIR Up Load using the air stopper assembly Because the...

Page 437: ... as shown in Figure H 7 For DOWN face tighten the two screws with 2 0 mm hex key to install the ramp cylinder assembly to the ramp rail assembly as shown in Figure H 8 Table H 2 LED Assignment LED Description Power When DC 24V is supplied from the power supply unit LED is illuminated Tilt When switch is set to Tilt LED is illuminated Ramp When switch is set to Ramp LED is illuminated Error This LE...

Page 438: ... Place the media onto the disk clamp CAUTION If the media size and the ramp type is mismatched the ramp hits to the media For example the ramp for 2 5 is attached in spite of the 3 5 media is placed Step 2 Place the HGA cassette on the HLM CAUTION If the media size and the ramp type is mismatched the ramp hits the media For example the ramp for 2 5 is attached in spite of the 3 5 media is placed S...

Page 439: ...n as shown in Figure H 10 2 The head moves to the ramp load position from the home position which is specified by using the ramp load positioning utility 3 The head is loaded 4 The head moves to the media load position with the specified speed which is specified by using the ramp load positioning utility 5 The ramp moves to the Ramp Out position from the Ramp In position 6 The head moves to initia...

Page 440: ...follows Ramp In A position where the ramp onto the media as shown in Figure H 10 The head is loadable when the ramp is in Ramp In position Ramp Out A position where the ramp is out of the media as shown in Figure H 10 Usually the ramp is in Ramp Out position during the measurement to avoid the collision with the HLM Figure H 10 Ramp In and Ramp Out Position Picture is UP Face Artisan Technology Gr...

Page 441: ...int The air cylinder on the ramp loading mechanism has life span due to fatigue and it requires replacement every 1 000 000 head down action Tools Required 2 0 mm Hex Key Miniature Driver Diagonal Cutting Plier Silicon Grease Lint Free Cloth Parts Required Cleaning Procedure For details refer to the E5013A service manual Replacement Procedure For details refer to the E5013A service manual Table 6 ...

Page 442: ...on A load position where the head onto the media The ramp load positioning utility is a tool used in determining the ramp load position and the media load position Once the ramp load positioning is completed the positioning data will be saved in the E5023 system CAUTION When the media size media thickness or a kind of the heads is changed re positioning is required Perform the ramp load positionin...

Page 443: ...ht or left side of the media HGA up Perform the unload HGA down Perform the load Ramp In Move the ramp to the Ramp In position Ramp Out Move the ramp to the Ramp Out position Goto Ramp Position Unload the head and move it to the ramp load position Goto Media Position Unload the head and move it to the media load position Goto Home Position Unload the head and move it to the home position Ramp to M...

Page 444: ...ioning data contains each individual data of the UP face and the DOWN face cassette Perform the ramp load positioning each individual HGA face UP face and DOWN face cassette Step 1 Launch the ramp load positioning utility by the following mouse procedure then the window as shown in Figure H 12 is displayed Start Agilent Hard Disk Read Write Test System Ramp Positioning Utility Step 2 Place the HGA...

Page 445: ...the distance between the ramp load position to the media load position into the Ramp to Media Position text box Figure H 15 Distance between Ramp Load Position and Media Load Position Step 7 If ok click on the Store Ramp Media Position button then the box such as Figure H 16 is displayed If ok click on the OK button then ramp load position and the media load position are stored into the spinstand ...

Page 446: ...the ramp load test click the Test button then Ramp Load Test menu as shown in Figure H 13 is displayed Click the Load Test button then the head is moved in order Click the Close button to return to the main menu CAUTION Remove the media from the disk clamp before ramp load test because the media does not rotate during this test Step 9 Click the Close button of the main menu then the ramp load posi...

Page 447: ...446 AppendixH Ramp Load Ramp Load Positioning Utility Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 448: ...P Popcorn Noise Popcorn Noise are random noise spikes that occur when the head changes its operation from write to read PW reference A rough PW value to make measurements on a parametric module See TAA Measurement on page 240 R Resolution This is an old test method that is used to measure the effect on how close transitions occur S Sense Current Current that is supplied to the head to read the dat...

Page 449: ...al noise spikes distorts the readback signal of the read head U User defined Data pattern A pattern where the user can specify his own data pattern W Write Current Current that is supplied to the head to write the data is called write current Typical value of write current is 40 mA for modern MR and GMR head Waveform Analysis A type of measurement which uses an oscilloscope This includes parametri...

Page 450: ...tor 265 Dipulse Extraction NLTS 149 dll 33 Documentation Warranty 7 drive configuration 310 drive control 310 drive setup 310 E E5023A option 415 specifications 329 E5023A option 426 specifications 329 E5039B specifications 330 E5039C specifications 330 E5041A 262 emergency switch 29 encoder 264 Erase Write 205 erase band 286 erase strip 269 F fast micro track profile 289 Filter Equalization 265 f...

Page 451: ...olated pulse reference 308 L Load Type Normal 231 Ramp 231 Tilt 231 M manuals 18 measurement mode 308 measurement speed 32 Membrane Air Dryer Assembly 440 micro track 105 109 286 micro track profile 286 289 fast 289 N Narrow Band TAA 92 Narrow Band TAA Measurement 248 NLTS 259 NRZ non return to zero 264 O off track capability OTC 268 On Track BER Measurement 170 266 operating system 32 optimize BE...

Page 452: ... 153 260 261 SNR Triple Track Measurement 133 SNR Triple Track Test 297 software 32 Spectral SNR 155 Spectrum Analyzer Display 227 Spectrum Measurement 157 spindle speed 230 spinstand 31 squash 295 squeeze position 295 Squeezed OTRC 294 Stability Measurement 78 248 Standard Triple Track Measurement 126 Standard Triple Track Test 293 Sub Harmonic Noise Ratio 271 system block diagram 30 system softw...

Page 453: ...quipment Have surplus equipment taking up shelf space We ll give it a new home Learn more Visit us at artisantg com for more info on price quotes drivers technical specifications manuals and documentation Artisan Scientific Corporation dba Artisan Technology Group is not an affiliate representative or authorized distributor for any manufacturer listed herein We re here to make your life easier How...

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