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258

Chapter 5

Measurement Definition

Measurement Parameter Definition

Equation 5-15

Absolute Polarity

Absolute polarity is computed from the given equation above. Analyzing Equation 5-15, in
simple terms if “Absolute Polarity” > 0, then the pinned layer is normal and the head is
considered good. If “Absolute Polarity” < 0, then the pinned layer is reversed and head is
assumed to be damaged.

NOTE

If the initial pulse of Figure 5-13 is isoTAA- (i.e, a negative pulse) then the pinned layer for
“Absolute Polarity” < 0 is normal. 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

and isoTAA- respectively.

3. Write the 1-3 bit pattern or user defined absolute polarity pattern

4. Measure (Tribit -TAA) by denoting TAA+ and TAA- of the 1-3 bit pattern as

and triTAA- respectively.

5. Iterate steps 1to 4 for averaging.

AbsPol

triTAA +

isoTAA +

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









triTAA Ð

isoTAA Ð

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









Ð

triTAA +

isoTAA +

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









triTAA Ð

isoTAA Ð

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









+

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

=

Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

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Содержание E5022A

Страница 1: ...service in house repair center WE BUY USED EQUIPMENT Sell your excess underutilized and idle used equipment We also offer credit for buy backs and trade ins www artisantg com WeBuyEquipment REMOTE IN...

Страница 2: ...ation 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 Qu...

Страница 3: ...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 Mic...

Страница 4: ...ition 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 Edi...

Страница 5: ...4 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Страница 6: ...djustments 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 remo...

Страница 7: ...our 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 personn...

Страница 8: ...ssential 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...

Страница 9: ...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 defi...

Страница 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...

Страница 11: ...10 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Страница 12: ...t 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 Cl...

Страница 13: ...c 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...

Страница 14: ...t 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 Trac...

Страница 15: ...n 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...

Страница 16: ...ion 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...

Страница 17: ...e 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...

Страница 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...

Страница 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...

Страница 20: ...talled 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...

Страница 21: ...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 Manu...

Страница 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...

Страница 23: ...36A 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 E50...

Страница 24: ...ork 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 Conventiona...

Страница 25: ...010B 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 par...

Страница 26: ...t 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...

Страница 27: ...erview 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 Guarant...

Страница 28: ...n 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...

Страница 29: ...n 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...

Страница 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...

Страница 31: ...mount 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 Fil...

Страница 32: ...l 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 t...

Страница 33: ...nto 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 E50...

Страница 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 instal...

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

Страница 36: ...hapter 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 artisan...

Страница 37: ...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 th...

Страница 38: ...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...

Страница 39: ...rmal 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 butt...

Страница 40: ...ill 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 Ste...

Страница 41: ...ontacts 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...

Страница 42: ...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 Instrumenta...

Страница 43: ...rement 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 orde...

Страница 44: ...er 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 Gro...

Страница 45: ...tware 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...

Страница 46: ...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...

Страница 47: ...ected 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 in...

Страница 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 cass...

Страница 49: ...an 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...

Страница 50: ...rigin 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...

Страница 51: ...ation 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...

Страница 52: ...5022 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 Agile...

Страница 53: ...recompensation 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 t...

Страница 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 s...

Страница 55: ...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 E...

Страница 56: ...E5023 system can not guarantee a track offset of 6 m 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...

Страница 57: ...ation 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...

Страница 58: ...fault 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...

Страница 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...

Страница 60: ...itle 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 Gro...

Страница 61: ...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 afte...

Страница 62: ...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 significantl...

Страница 63: ...n 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...

Страница 64: ...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...

Страница 65: ...figuration 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 Tec...

Страница 66: ...o 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 th...

Страница 67: ...o 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...

Страница 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 TA...

Страница 69: ...nt 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 th...

Страница 70: ...ays the measurement results for every 5 sec 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 mini...

Страница 71: ...nge 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 wr...

Страница 72: ...easure 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...

Страница 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 bit...

Страница 74: ...uto 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 Bas...

Страница 75: ...F 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...

Страница 76: ...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 o...

Страница 77: ...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...

Страница 78: ...is 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 devia...

Страница 79: ...ement 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 TA...

Страница 80: ...rent 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 pa...

Страница 81: ...easurement 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 wri...

Страница 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 programmi...

Страница 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 writte...

Страница 84: ...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...

Страница 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 wind...

Страница 86: ...e 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...

Страница 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...

Страница 88: ...ity 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 sta...

Страница 89: ...on 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 p...

Страница 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...

Страница 91: ...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 S...

Страница 92: ...peration 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 measure...

Страница 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 s...

Страница 94: ...s 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...

Страница 95: ...ts 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 Measur...

Страница 96: ...e 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 appl...

Страница 97: ...rameters 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 windo...

Страница 98: ...n 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 C...

Страница 99: ...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 Dis...

Страница 100: ...rack 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 Meas...

Страница 101: ...nate 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 Off...

Страница 102: ...u 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...

Страница 103: ...rase 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...

Страница 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...

Страница 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 Compensa...

Страница 106: ...ment 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 reach...

Страница 107: ...nse 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 Conf...

Страница 108: ...and 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...

Страница 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...

Страница 110: ...er 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...

Страница 111: ...rn 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 E...

Страница 112: ...ase 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...

Страница 113: ...nd 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 Swe...

Страница 114: ...t 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 ch...

Страница 115: ...ck 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 p...

Страница 116: ...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 ad...

Страница 117: ...rn 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 Har...

Страница 118: ...cedure 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...

Страница 119: ...f 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 parame...

Страница 120: ...easurement 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...

Страница 121: ...cedure 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...

Страница 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...

Страница 123: ...ies 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 ste...

Страница 124: ...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 automati...

Страница 125: ...o 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...

Страница 126: ...l 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 automatic...

Страница 127: ...us 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 Trac...

Страница 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 automatic...

Страница 129: ...n 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...

Страница 130: ...lue 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 hi...

Страница 131: ...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 Offs...

Страница 132: ...se 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 Ba...

Страница 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...

Страница 134: ...iple 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 o...

Страница 135: ...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 p...

Страница 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 ab...

Страница 137: ...he 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 Configura...

Страница 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 Noi...

Страница 139: ...t 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...

Страница 140: ...ment 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 p...

Страница 141: ...malized 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 Technolog...

Страница 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 Squeez...

Страница 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...

Страница 144: ...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...

Страница 145: ...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 a...

Страница 146: ...ate 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...

Страница 147: ...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 Configur...

Страница 148: ...arting 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...

Страница 149: ...sure 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...

Страница 150: ...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 Specif...

Страница 151: ...ee 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 E...

Страница 152: ...a 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 S...

Страница 153: ...S 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 Gr...

Страница 154: ...ion 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...

Страница 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...

Страница 156: ...nput 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 w...

Страница 157: ...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...

Страница 158: ...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...

Страница 159: ...o 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...

Страница 160: ...o 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 sho...

Страница 161: ...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 Curre...

Страница 162: ...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 wr...

Страница 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 butt...

Страница 164: ...nter 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...

Страница 165: ...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 l...

Страница 166: ...played 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 si...

Страница 167: ...omer 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...

Страница 168: ...t 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 p...

Страница 169: ...elay 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 se...

Страница 170: ...k 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...

Страница 171: ...pensation 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 b...

Страница 172: ...pecifies 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 numb...

Страница 173: ...ritten on the background adjacent track Position Specifies the position to write the background adjacent track The adjacent track position can be set from 0 m min to 6 m max See Figure 3 110 Foregroun...

Страница 174: ...e 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 Co...

Страница 175: ...ensating 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 E...

Страница 176: ...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 pat...

Страница 177: ...h 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 butto...

Страница 178: ...he 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 ent...

Страница 179: ...nfig 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 measu...

Страница 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 Swee...

Страница 181: ...ecified 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 hpe502...

Страница 182: ...nfig 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 me...

Страница 183: ...n 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...

Страница 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 mea...

Страница 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...

Страница 186: ...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 but...

Страница 187: ...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 w...

Страница 188: ...ecifies 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...

Страница 189: ...ill 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...

Страница 190: ...ern 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 set...

Страница 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 Grou...

Страница 192: ...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...

Страница 193: ...lection 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 automatic...

Страница 194: ...LF 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...

Страница 195: ...election 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 automatica...

Страница 196: ...ite 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...

Страница 197: ...e 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 th...

Страница 198: ...ter 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...

Страница 199: ...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...

Страница 200: ...os 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 updat...

Страница 201: ...t 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 Speci...

Страница 202: ...s 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...

Страница 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...

Страница 204: ...s 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 Click...

Страница 205: ...he 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 change...

Страница 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 Spec...

Страница 207: ...ritten 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 Er...

Страница 208: ...ttern 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 o...

Страница 209: ...rn 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...

Страница 210: ...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 compen...

Страница 211: ...ersus 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 Th...

Страница 212: ...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 spinstan...

Страница 213: ...med 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 alig...

Страница 214: ...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 spin...

Страница 215: ...eration Measurement Service Overview The service menu allows you to evaluate the spinstand performance Contact Agilent Technologies for information Artisan Technology Group Quality Instrumentation Gua...

Страница 216: ...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 tha...

Страница 217: ...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 ww...

Страница 218: ...apter Title Configuration 5 Chapter Title 4 Configuration This chapter provides the information about the measurement configurations of E5022 E5023 Artisan Technology Group Quality Instrumentation Gua...

Страница 219: ...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...

Страница 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...

Страница 221: ...ation 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 Guarant...

Страница 222: ...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...

Страница 223: ...nual 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...

Страница 224: ...formation 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...

Страница 225: ...urrently 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...

Страница 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 Setu...

Страница 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...

Страница 228: ...nalyzer 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 Wh...

Страница 229: ...ement 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 revolutio...

Страница 230: ...ter 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 Tec...

Страница 231: ...he 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 Sho...

Страница 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 sp...

Страница 233: ...pe5022_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 t...

Страница 234: ...de 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 ou...

Страница 235: ...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 sett...

Страница 236: ...he 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 Ad...

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

Страница 238: ...3 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...

Страница 239: ...metric 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...

Страница 240: ...e 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 B...

Страница 241: ...ric 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 T...

Страница 242: ...eason 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 t...

Страница 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...

Страница 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...

Страница 245: ...ic 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...

Страница 246: ...efinition 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...

Страница 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...

Страница 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 comp...

Страница 249: ...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 iteratio...

Страница 250: ...te 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 a...

Страница 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 simi...

Страница 252: ...ically 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...

Страница 253: ...metry 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 bas...

Страница 254: ...seline 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 i...

Страница 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 n...

Страница 256: ...layer 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 t...

Страница 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 tri...

Страница 258: ...ayer 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...

Страница 259: ...rmal 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...

Страница 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...

Страница 261: ...n Formula 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...

Страница 262: ...asurement 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 V...

Страница 263: ...n 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 measu...

Страница 264: ...hold 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 tim...

Страница 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 tra...

Страница 266: ...igitized 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...

Страница 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...

Страница 268: ...ter 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 perf...

Страница 269: ...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 som...

Страница 270: ...ed 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...

Страница 271: ...nch 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 d...

Страница 272: ...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...

Страница 273: ...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...

Страница 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...

Страница 275: ...ctions 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 F...

Страница 276: ...ckOffsetCompPattern 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 writ...

Страница 277: ...n 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 functio...

Страница 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 com...

Страница 279: ...to 4 m The maximum offset range is 6 m 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 sequenc...

Страница 280: ...t 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 pat...

Страница 281: ...k 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 compens...

Страница 282: ...g 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 sta...

Страница 283: ...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 seg...

Страница 284: ...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...

Страница 285: ...terial 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 pr...

Страница 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 use...

Страница 287: ...h 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 f...

Страница 288: ...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_configMicroT...

Страница 289: ...ter5 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 artisa...

Страница 290: ...ment 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 pre...

Страница 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 acce...

Страница 292: ...t 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 chan...

Страница 293: ...e 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...

Страница 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 follo...

Страница 295: ...t 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 calc...

Страница 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...

Страница 297: ...re 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 writ...

Страница 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 ca...

Страница 299: ...de 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 N...

Страница 300: ...Level 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...

Страница 301: ...nge 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 deno...

Страница 302: ...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 Calcul...

Страница 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 Calcula...

Страница 304: ...ified 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 ca...

Страница 305: ...rite 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 m...

Страница 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...

Страница 307: ...her 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 Guar...

Страница 308: ...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...

Страница 309: ...nder 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 pr...

Страница 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 Qual...

Страница 311: ...pts 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 simu...

Страница 312: ...se 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...

Страница 313: ...stablish 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 subtr...

Страница 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 tra...

Страница 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...

Страница 316: ...ter 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...

Страница 317: ...e 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 b...

Страница 318: ...hing 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...

Страница 319: ...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 Arti...

Страница 320: ...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 co...

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

Страница 322: ...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...

Страница 323: ...ps 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 Patter...

Страница 324: ...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 6...

Страница 325: ...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 5 sec Data Pattern HF LF ISOL Absolute Measurement Accu...

Страница 326: ...acy 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 Si...

Страница 327: ...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...

Страница 328: ...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 00...

Страница 329: ...ror 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...

Страница 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...

Страница 331: ...5 536 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...

Страница 332: ...de 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 23...

Страница 333: ...ms 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 Is...

Страница 334: ...racy 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 De...

Страница 335: ...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 as...

Страница 336: ...s 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...

Страница 337: ...Accuracy 15 m 600 Skew Range 30o max 60o min Table 6 53 Stage Type Piezo translator operated flexure substage Stage Travel 15 m 600 Travel Resolution 2 5 nm 0 1 Position Accuracy 50 nm 2 Position Repe...

Страница 338: ...upply 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 7...

Страница 339: ...23 1 C Skew Range 30 to 30 Table 6 58 Stage Type Piezo translator operated flexure substage Stage Travel 15 m 600 Travel Resolution 1 7 nm 0 07 Positioning Repeatability 1 7 nm 0 07 1 1 m Asynchronous...

Страница 340: ...stand 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 k...

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

Страница 342: ...ted 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 sof...

Страница 343: ...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 Quali...

Страница 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...

Страница 345: ...t 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...

Страница 346: ...2 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 Technolo...

Страница 347: ...evision 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 Qua...

Страница 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...

Страница 349: ...n 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 measure...

Страница 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...

Страница 351: ...pt 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 he...

Страница 352: ...to 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...

Страница 353: ...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...

Страница 354: ...ation 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 medi...

Страница 355: ...ead 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...

Страница 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_trackOffsetCo...

Страница 357: ...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 migh...

Страница 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 t...

Страница 359: ...7 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 pa...

Страница 360: ...wing 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 Readin...

Страница 361: ...19 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 JP1KI0...

Страница 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 meas...

Страница 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...

Страница 364: ...unded 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 Profi...

Страница 365: ...pendixA 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 artisant...

Страница 366: ...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 Sup...

Страница 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 p...

Страница 368: ...EE 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...

Страница 369: ...ndec 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 T...

Страница 370: ...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 t...

Страница 371: ...gram 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 r...

Страница 372: ...re 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 param...

Страница 373: ...rns 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...

Страница 374: ...de 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...

Страница 375: ...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...

Страница 376: ...lation 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 sett...

Страница 377: ...or 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 whi...

Страница 378: ...proves 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 max...

Страница 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 adde...

Страница 380: ...hapter 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 Gro...

Страница 381: ...r 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 c...

Страница 382: ...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...

Страница 383: ...g 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...

Страница 384: ...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 f...

Страница 385: ...2 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 spe...

Страница 386: ...cquisition 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...

Страница 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 t...

Страница 388: ...k 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 numbe...

Страница 389: ...ult 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...

Страница 390: ...ages 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 o...

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

Страница 392: ...nd 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 Qu...

Страница 393: ...ool 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...

Страница 394: ...en 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...

Страница 395: ...efer 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 o...

Страница 396: ...In case 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 cassett...

Страница 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 Fig...

Страница 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 torq...

Страница 399: ...ure 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 Screwdriv...

Страница 400: ...y 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 hei...

Страница 401: ...t 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 ro...

Страница 402: ...assette 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 sh...

Страница 403: ...endixC 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 artisa...

Страница 404: ...anged 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 u...

Страница 405: ...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...

Страница 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 fr...

Страница 407: ...oll 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...

Страница 408: ...able 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 E5...

Страница 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 measur...

Страница 410: ...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 Q...

Страница 411: ...ement 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 P2...

Страница 412: ...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 0...

Страница 413: ...3 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 6...

Страница 414: ...n 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...

Страница 415: ...irmware 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...

Страница 416: ...bove 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 a...

Страница 417: ...lifiers 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 dr...

Страница 418: ...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...

Страница 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 66...

Страница 420: ...ists 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 h...

Страница 421: ...er 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 2...

Страница 422: ...6 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...

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

Страница 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...

Страница 425: ...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 Su...

Страница 426: ...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 Instrumenta...

Страница 427: ...onnection 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 th...

Страница 428: ...mately 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...

Страница 429: ...wo 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...

Страница 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...

Страница 431: ...nnection 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 SO...

Страница 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...

Страница 433: ...on 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 l...

Страница 434: ...n 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 mechan...

Страница 435: ...t 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...

Страница 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 stop...

Страница 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 Desc...

Страница 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 St...

Страница 439: ...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 me...

Страница 440: ...ollows 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 show...

Страница 441: ...nt 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 Cutt...

Страница 442: ...n 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 com...

Страница 443: ...t 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...

Страница 444: ...oning 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...

Страница 445: ...he 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 clic...

Страница 446: ...he 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...

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

Страница 448: ...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...

Страница 449: ...l 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...

Страница 450: ...or 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...

Страница 451: ...lated 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 28...

Страница 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 squ...

Страница 453: ...service in house repair center WE BUY USED EQUIPMENT Sell your excess underutilized and idle used equipment We also offer credit for buy backs and trade ins www artisantg com WeBuyEquipment REMOTE IN...

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