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Creating and Using Math Waveforms

3- 198

CSA7000B Series & TDS7000B Series Instruments User Manual

H

Hamming Window. This window is unique in that the time domain shape
does not taper all the way to zero at the ends (see Figure 3--57). This makes
it a good choice if you wanted to process the real and imaginary parts of the
spectrum off line and inverse transform it back to the time domain. Because
the data does not taper to zero you could then remove the effect of the
window function from the result.

1

0

Amplitude

Time

--43 dB side lobe

0

--80

dB

Frequency bins

--40

Figure 3- 57: Time and frequency graphs of the Hamming window

Содержание CSA7404B

Страница 1: ...er Manual CSA7404B Communications Signal Analyzers TDS7704B TDS7404B TDS7254B TDS7154B Digital Phosphor Oscilloscopes 071 1226 03 This document supports firmware version 4 0 3 and above www tektronix com ...

Страница 2: ...as applicable Tektronix products are covered by U S and foreign patents issued and pending Information in this publication supercedes that in all previously published material Specifications and price change privileges reserved TEKTRONIX and TEK are registered trademarks of Tektronix Inc TekConnect MyScope and VocalLink are registered trademarks of Tektronix Inc TekVISA FastFrame and MultiView Zoo...

Страница 3: ...eturn of the product to Customer Customer shall be responsible for paying any associated taxes or duties This warranty shall not apply to any defect failure or damage caused by improper use or improper or inadequate maintenance and care Tektronix shall not be obligated to furnish service under this warranty a to repair damage resulting from attempts by personnel other than Tektronix representative...

Страница 4: ......

Страница 5: ...Removing the Removable Hard Drive 1 11 Reinstalling the Removable Hard Drive 1 12 Installing Software 1 13 Enabling or Disabling Your LAN and Connecting to a Network 1 16 Setting up a Dual Display 1 17 Incoming Inspection 1 21 Assemble Equipment 1 21 Self Tests 1 22 Functional Tests 1 23 Check Vertical Operation 1 23 Check Horizontal Operation 1 26 Check Trigger Operation 1 28 Check File System 1 ...

Страница 6: ...t Roll Mode 3 33 Acquisition Control Background 3 34 Acquisition Hardware 3 34 Sampling Process 3 35 Acquisition Modes 3 35 Waveform Record 3 36 Real Time Sampling 3 37 Equivalent Time Sampling 3 37 Interpolation 3 39 Interleaving 3 40 Using Fast Acquisition Mode 3 40 Using Fast Acquisitions 3 41 To Turn Fast Acquisitions On and Off 3 44 To Set Display Format 3 47 Using FastFrame 3 48 Using FastFr...

Страница 7: ...h 3 83 To Trigger on a Runt Pulse 3 85 Trigger Based on Pulse Width 3 87 To Trigger Based on Transition Time 3 89 Triggering on a Window 3 92 Trigger Based on Pulse Timeout 3 94 Trigger on a Pattern 3 95 To Trigger on a State 3 98 To Trigger on Setup Hold Time Violations 3 99 Logic Qualify a Trigger 3 102 Sequential Triggering 3 103 Using Sequential Triggering 3 104 To Trigger on a Sequence 3 109 ...

Страница 8: ...Serial Mask Testing 3 165 Creating and Using Math Waveforms 3 167 Defining Math Waveforms 3 168 Using Math 3 169 To Define a Math Waveform 3 175 Operations on Math Waveforms 3 177 Using Math Waveforms 3 178 To Use Math Waveforms 3 179 Defining Spectral Math Waveforms 3 182 Using Spectral Math Controls 3 183 Recognizing Aliasing 3 204 To Select a Predefined Spectral Math Waveform 3 206 To Define a ...

Страница 9: ...nal Processing Features A 3 Display Features A 3 Measurement Features A 3 Trigger Features A 4 Convenience Features A 4 Specification Tables A 5 Appendix B Automatic Measurements Supported B 1 Levels Used in Taking Amplitude Timing and Area Measurements B 5 Levels Used in Taking Eye Measurements B 6 P Values B 7 T1 Values B 8 T2 Values B 8 DCD Values B 8 Measurements Annotations B 9 Appendix C Men...

Страница 10: ...Table of Contents vi CSA7000B Series TDS7000B Series Instruments User Manual Appendix D Cleaning D 1 Exterior Cleaning D 1 Flat Panel Display Cleaning D 2 Glossary Index ...

Страница 11: ...e file system test 1 30 Figure 3 1 Input and Acquisition Systems and Controls 3 8 Figure 3 2 Setting vertical range and position of input channels 3 19 Figure 3 3 Varying offset moves the vertical acquisition window on the waveform 3 20 Figure 3 4 Horizontal Acquisition window definition 3 21 Figure 3 5 Common trigger record length and acquisition rate for all channels 3 23 Figure 3 6 Roll mode 3 ...

Страница 12: ... Display elements 3 120 Figure 3 33 Horizontal Position includes time to Horizontal Reference 3 123 Figure 3 34 Graticule Cursor and Automatic measurements 3 140 Figure 3 35 Annotated display 3 141 Figure 3 36 High Low tracking methods 3 143 Figure 3 37 Reference level calculation methods 3 144 Figure 3 38 Horizontal cursors measure amplitudes 3 152 Figure 3 39 Components determining Time cursor r...

Страница 13: ...Time and frequency graphs for the Hanning window 3 199 Figure 3 59 Time and frequency graphs for the Kaiser Bessel window 3 200 Figure 3 60 Time and frequency graphs of the Blackman Harris window 3 201 Figure 3 61 Time and frequency domain graphs for the Flattop2 window 3 202 Figure 3 62 Tek Exponential window in the time and the frequency domains 3 203 Figure 3 63 How aliased frequencies appear i...

Страница 14: ...9 Cursor functions types 3 151 Table 3 10 Cursor units 3 154 Table 3 11 Math expressions and the math waveforms produced 3 170 Table 3 12 Spectral analyzer controls 3 183 Table 3 13 Window characteristics 3 194 Table A 1 Instrument models A 2 Table A 2 Channel input and vertical specifications A 5 Table A 3 Horizontal and acquisition system specifications A 11 Table A 4 Trigger specifications A 15...

Страница 15: ... 2 Edit menu commands C 3 Table C 3 Vertical menu commands C 4 Table C 4 Horiz Acq menu commands C 5 Table C 5 Trig menu commands C 7 Table C 6 Display menu commands C 9 Table C 7 Cursor menu commands C 11 Table C 8 Measure menu commands C 11 Table C 9 Masks menu commands C 13 Table C 10 Math menu commands C 14 Table C 11 Application menu commands C 14 Table C 12 Utilities menu commands C 15 Table...

Страница 16: ...Table of Contents xii CSA7000B Series TDS7000B Series Instruments User Manual ...

Страница 17: ...th ground Before making connections to the input or output terminals of the product ensure that the product is properly grounded Observe All Terminal Ratings To avoid fire or shock hazard observe all ratings and markings on the product Consult the product manual for further ratings information before making connections to the product Do Not Operate Without Covers Do not operate this product with c...

Страница 18: ... product or other property Terms on the Product These terms may appear on the product DANGER indicates an injury hazard immediately accessible as you read the marking WARNING indicates an injury hazard not immediately accessible as you read the marking CAUTION indicates a hazard to property including the product Symbols on the Product The following symbols may appear on the product CAUTION Refer t...

Страница 19: ...ing inspection procedure H Operating Basics uses maps to describe the various interfaces for controlling the instrument including the front panel and the software user interface These maps provide overviews of the product and its functions from several viewpoints H Reference comprises an encyclopedia of topics see Overview on page 3 1 that describe the instrument interface and features and gives b...

Страница 20: ...e instrument Reference A quick reference to major features of the instrument and how they operate Programmer Online Guide An alphabetical listing of the programming commands and other information related to controlling the instrument over the GPIB1 This document is available as both an online help program and as a PDF manual Service Manual Describes how to service the instrument to the module leve...

Страница 21: ...or Oscilloscope H TDS7404B Digital Phosphor Oscilloscope H TDS7254B Digital Phosphor Oscilloscope H TDS7154B Digital Phosphor Oscilloscope Differences between the instruments will be called out when necessary Otherwise the material applies to all instruments The word instrument refers to all products Key Features CSA7000B Series and TDS7000B Series instruments are high performance solutions for ve...

Страница 22: ...se and average acquisition modes H Full programmability with an extensive GPIB command set and a message based interface H Trigger modes include edge logic pulse may be logic qualified serial CSA7000B Series optional on TDS7000B Series communication CSA7000B Series and optional on TDS7000B Series and sequence at up to 4 GHz bandwidth depending on the model Window trigger mode triggers as the trigg...

Страница 23: ...tion H Support Software Not preinstalled on the instrument The compact discs included with the instrument contain additional software and files that may be useful to you H Readme file This file contains release notes and updates that could not be included in other product documentation H GPIB Programmer Online Help software This software in an online help format contains the information that you n...

Страница 24: ...Product Description 1 4 CSA7000B Series TDS7000B Series Instruments User Manual ...

Страница 25: ...wn the Instrument on page 1 10 H Backing Up User Files on page 1 11 H Installing Software on page 1 13 H Enabling or Disabling Your LAN and Connecting to a Network on page 1 16 H Setting up a Dual Display on page 1 17 Unpacking Verify that you have received all of the parts of your instrument The graphical packing list shows the standard accessories that you should find in the shipping carton prob...

Страница 26: ...nt H All the standard and optional accessories that you ordered Fill out and send in the customer registration card Checking the Environment Requirements Read this section before attempting any installation procedures This section describes site considerations power requirements and ground connections for your instrument The instrument is designed to operate on a bench or on a cart in the normal p...

Страница 27: ...ose you would make on a personal computer The connection points are shown in Figure 1 1 See Table 1 1 on page 1 9 for additional connection information CAUTION To avoid product damage either power off the instrument or place the instrument in Standby power mode before installing any accessories except a USB mouse or keyboard to the instrument connectors You can connect and disconnect USB devices w...

Страница 28: ...for dual display operation Printer RS 232 Network Keyboard Mouse USB Compact disk drive GPIB Instrument monitor large screen instrument display Description Icon Label Locations Audio line out Removable hard drive or floppy Audio line in Figure 1 1 Locations of peripheral connectors on rear panel ...

Страница 29: ...tructions for information on installing the rackmount kit Other Refer to the Readme file on the Product Software CD for possible additional accessory installation information not covered in this manual Powering On the Instrument Follow these steps to power on the instrument for the first time Either one of the following fuse sizes can be used each size requires a different fuse cap Both fuses must...

Страница 30: ...ss including a Windows shutdown to preserve settings and then removes power from most circuitry in the instrument Avoid using the rear panel power switch or disconnecting the line cord to power off the instrument NOTE If you do not use the On Standby switch to shut down the instrument before powering off the instrument the instrument will be in the factory Default Setup when powered on the next ti...

Страница 31: ...ackup tool You can back up to the floppy drive or to a third party storage device over the printer port rear panel Removing the Removable Hard Drive The removable hard drive is preinstalled at the factory You can secure data separate from the instrument with the removeable hard drive To remove the hard drive follow these steps 1 Verify that the instrument is powered off 2 Set the instrument so its...

Страница 32: ...e 1 4 on page 1 13 1 Verify that the instrument is powered off 2 Leaving the cover handle extended push the hard drive assembly into place until it stops ensuring that it is straight Push the hard drive assembly firmly to ensure that the connector is seated properly 3 Slide the cover handle in until it stops It will be almost flush with the back panel 4 Finger tighten the two thumb screws to ensur...

Страница 33: ...Ds that are shipped with the instrument If you need to restore the operating system you also need the Windows license information from the Certificate of Authenticity that is shipped with the instrument Read the software release notes README TXT ASCII file on the product soft ware CD before performing installation procedures This file contains additional installation and operation information that...

Страница 34: ... error messages H Programming examples The CD also contains a printable version of the programmer information in the form of a PDF file Manual Performance Verification Procedure This is a printable PDF file that describes how to verify the instrument performance using generic test equip ment User manual This is a PDF file of this user manual Serial Mask User Manual This is a PDF file that describe...

Страница 35: ... your keyboard and mouse 1 Connect a keyboard and mouse to the instrument 2 While holding down the CTRL and ALT keys press the DELETE key 3 Select Task Manager 4 In the Applications tab select TekScope exe and then select End Process to stop the instrument application The instrument application will restart after you restart the entire system following the installation of the desktop application s...

Страница 36: ... access to the instrument Power down Power on Rear panel Front panel Connect a keyboard and mouse 1 2 3 Figure 1 5 Enabling your LAN and connecting to a network 4 As the instrument begins to boot press the F2 key on the keyboard repeatedly until the message Entering SETUP Loading SETUP on some instruments appears 5 In the BIOS Setup Utility use the right arrow key on the keyboard to highlight the ...

Страница 37: ...gure it for your network You can find the network setup utility in the Windows Start menu if you select Settings Control Panel and then double click Network Consult your network administrator for specific instructions to make these settings NOTE If you want to disable network access for the instrument perform the above procedure except substitute Disabled for the command listed in step 8 The instr...

Страница 38: ...monitor was connected Follow the instructions if any on the instrument display to install new drivers for the monitor 7 Type a Control M to minimize the instrument application 8 In the Windows desktop right click the mouse and then select Properties to display the Display Properties dialog box 9 Select the Settings tab Click on the grayed out external monitor 2 in the display box and drag it to th...

Страница 39: ...new display area do these additional steps to move the Windows controls to the external monitor 1 Click and hold on the Windows task bar in the area shown in Figure 1 7 and then drag it upwards and toward the external monitor The task bar will first go to the side of the internal monitor then to the side of the external monitor and finally to the bottom of the external monitor Click here to drag t...

Страница 40: ...ser Manual 4 If you use the instrument help system you can drag the help windows to the external monitor so that you can read them while you operate the instrument 5 When you open any Windows application drag the windows from the application to the external monitor ...

Страница 41: ... the instrument fails any test within this section it may need service To contact Tektronix for service see Contacting Tektronix on the back of the title page Make sure you have put the instrument into service as detailed in Installation starting on page 1 5 Then assemble the following test equipment and proceed with the procedures that follow Assemble Equipment Self tests do not require any test ...

Страница 42: ...ostics control window b Run the System Diagnostics H First disconnect any input signals and probes from all four channels H Touch the Run button in the diagnostics control window c Wait The internal diagnostics do an exhaustive verification of proper instrument function This verification will take several minutes When the verification is finished the resulting status will appear in the diagnostics...

Страница 43: ...rth do not interpret the quantities given as limits NOTE Do not make changes to the front panel settings that are not called out in the procedures Each verification procedure will require you to set the instrument to certain default settings before verifying functions If you make changes to these settings other than those called out in the procedure you may obtain invalid results In this case redo...

Страница 44: ... display comes on NOTE If a probe is not available connect the probe compensation output to the channel input using a BNC cable and adapters CSA7404 TDS7404 TDS7254 TDS7154 Connect the probe tip to the short pin and the probe ground to the long pin as shown A BNC cable from PROBE COMPENSATION output to the A input of the Probe Calibration and Deskew Fixture Remove the jumper GAIN CAL connections T...

Страница 45: ...ts are true H Verify that the vertical scale readout and the waveform amplitude for the channel under test are as shown in Table 1 3 Table 1 3 Vertical settings CSA7404 TDS7704B TDS7404 TDS7254 TDS7154 Setting With P7240 or P7260 Without a probe Scale 200 mV 200 mV Waveform amplitude 5 2 divisions 2 5 divisions H The front panel vertical POSITION knob for the channel you are testing moves the sign...

Страница 46: ...Hi Res mode displays an actively acquiring waveform on screen with the noise that was present in Sample mode reduced H Average mode displays an actively acquiring waveform on screen with the noise reduced H Envelope mode displays an actively acquiring waveform on screen with the noise displayed H Waveform Database mode displays an actively acquiring waveform on screen that is the accumulation of s...

Страница 47: ...compensation signal is about five horizontal divisions on screen for the 200 s div horizontal scale setting H Rotating the horizontal SCALE knob clockwise expands the waveform on screen more horizontal divisions per waveform period counter clockwise rotation contracts it and returning the horizontal scale to 200 s div returns the period to about five divisions H The horizontal POSITION knob positi...

Страница 48: ... on e Verify the delay toggle function H Rotate the front panel horizontal POSITION knob to center the rising edge horizontally on the screen H Change the horizontal SCALE to 40 ns div The rising edge of the waveform should remain near the center graticule H Readjust the delay setting to position the rising edge 2 divisions to the right of the center graticule line H Push the front panel DELAY but...

Страница 49: ...ate it Leave the signal untriggered H Pushing the front panel trigger LEVEL knob sets the trigger level to the 50 amplitude point of the signal and triggers the signal that you just left untriggered Leave the signal triggered 7 Verify that the delayed trigger system operates a Set up the delayed trigger H From the Trig menu select A B Sequence This displays the A B Sequence tab of the trigger setu...

Страница 50: ...the channel input and the Probe Compensation output Equipment required One BNC cable One 1 44 Mbyte 3 5 inch DOS compatible formatted disk One TCA BNC TekConnect adapter Prerequisites None 1 Initialize the instrument Push the front panel DEFAULT SETUP button 2 Hook up the signal source Connect the equipment to the CH 1 input as shown in Figure 1 13 Instrument under test BNC cable from PROBE COMPEN...

Страница 51: ...h the Save button to save the setup to the default file name 9 Change the settings again Set the horizontal SCALE to 200 s div 10 Verify the file system works a Touch the Recall Setups tab in the control window b Touch the Recall button under Recall settings from file in the control window This displays a familiar Windows dialog box for locating the settings file that you want to recall c In the R...

Страница 52: ...strument Diagnostics tabs Results of the tests display on their property pages To check the hardware and Windows software underlying the instrument UI user interface run the CheckIt Utilities from the Windows Start menu 1 Minimize the instrument application before running the external diagnostics From the File menu select Minimize 2 Touch Start then touch Programs in the Start Menu Finally touch C...

Страница 53: ...el 8 Ms maximum n n n n n 3M Long record length 4 Ms per channel 16 Ms maximum n n n n n 4M Long record length 8 M per channel 32 Ms maximum n n n n n 5M Long record length 16 M per channel 64 Ms maximum n n n n n Power cords A0 North American 115 V 60 Hz power cord standard n n n n n A1 Universal European 230 V 50 Hz power cord n n n n n A2 United Kingdom 230 V 50 Hz power cord n n n n n A3 Austr...

Страница 54: ...s requires TDSUSBF USB test fixture n n n n n SM Serial Communications Mask Testing Standard on CSA7000B Series n n n n ST Serial Pattern Triggering Standard on CSA7000B Series n n n n TC1 Add one TCA 1MEG TekConnect high impedance buffer amplifier n n Field upgrades CSA7BUP Many are available Contact Tektronix see the back of the title page for a complete list of available CSA7UP options n TDS7BU...

Страница 55: ...th OpenChoicet Solutions Kit 020 2513 xx Option SM and ST User Manual 071 1228 xx Online Help part of the application software Performance Verification a pdf file on the Product Software CD Programmer Online Guide files on the Product Software CD NIST Z540 1 and ISO9000 Calibration Certificate Four TekConnect to SMA adapters TDS7704B CSA7404B TDS7404B TCA SMA Four TekConnect to BNC adapters TDS725...

Страница 56: ...ry Part number Service Manual 071 1227 xx Transit Case 016 1522 xx Scope Cart K4000 Option 1K P6158 20x 1 kΩ low capacitance voltage divider probe1 P6158 P6245 1 5 GHz high speed active probe1 P6245 P6248 1 5 GHz differential probe1 P6248 P7240 active 4 GHz probe P7240 P7260 active 6 GHz probe TDS7704B P7260 P7330 differential 3 5 GHz probe P7330 P7350 differential 5 GHz probe P7350 P7380SMA 8 GHz...

Страница 57: ...ter 1100 to 1650 nm 1 P6703A B AFTDS Telecomm differential electrical interface adapter for line rates 8 Mb s requires TCA BNC adapter 1 AFTDS TDSUSBF USB test fixture used with Option USB TDSUBF AMT75 1 GHz 75 Ω ohm adapter1 AMT75 TekConnect to SMA adapter TCA SMA TekConnect to BNC adapter TCA BNC TekConnect to N adapter TCA N TekConnect high impedance buffer amplifier 500 MHz 1 MΩ BNC to TekConn...

Страница 58: ...5 00 FC PC SC PC 119 5115 00 119 5116 00 SC PC ST PC 119 5116 00 119 4513 00 ST PC 119 4513 00 DIN PC 47256 119 4546 00 Diamond 2 5 119 4556 00 Diamond 2 5 Diamond 3 5 119 4556 00 119 4558 00 Diamond 3 5 SMA 2 5 119 4558 00 119 4517 00 SMA 2 5 SMA 119 4517 00 119 4557 00 SMA 119 4557 00 Dust cap optical CSA7404B 200 4104 00 1 Requires TCA BNC TekConnect BNC adapter NOTE The P6339A probe is not sup...

Страница 59: ...s the elements of the User Interface UI application which provides complete control of the instru ment H Front Panel Map on page 2 7 describes the elements of the instrument front panel and cross references information relevant to each element H Display Map on page 2 8 describes elements and operation of single grati cule and multiple graticule displays H Front Panel I O Map on page 2 9 describes ...

Страница 60: ... UI Help Online Help System Access online help from the instrument for context sensitive information on virtually all controls and elements on screen Online help includes procedures for using instrument functions See Accessing Online Help on page 3 263 NR3 Space GPIB Commands Online Programmers Guide Quickly find the syntax of a command and copy the command if desired Read about communication erro...

Страница 61: ...tion Page 3 119 Optical to electrical converter CSA7000B Series Optical input Electrical output Recovered clock output Recovered data output The model comprises four high level subsystems or processes embodying a variety of hardware and software functions and the data that connects them H Digital Signal Acquisition System Acquires a waveform record from each signal that you input to each channel u...

Страница 62: ...mples H Optical to Electrical Converter CSA7000B Series Converts optical signals to electrical signals H DSP Transformation System Performs a variety of transformations or operations beginning with the most fundamental data element s in the system the Channel Waveform s Waveform math operations automatic measurements spectral waveforms and histogram generation are examples H Input Output Systems P...

Страница 63: ...he pretrigger points current until triggering criteria are met or a trigger is forced Auto trigger mode only and the instrument accepts a trigger Acquire posttrigger points 5 The instrument acquires samples until the posttrigger portion of the waveform record channel being acquired is filled Waveform record complete No Yes 6 If averaging enveloping or waveform database is on the record becomes par...

Страница 64: ... scale and parameters If a setup menu is displayed these readouts move to the graticule area Multipurpose Knob Readouts Adjust parameters controlled by multipurpose knobs Buttons Menu Touch to toggle between toolbar and menu bar modes Waveform Handle Touch and drag to change vertical position of waveform Touch the handle and change the position and scale using the multipurpose knobs For a shortcut...

Страница 65: ...n and off Vertically scale or position the waveform Page 3 8 Horizontally scale position delay and set record length resolution of selected waveform Page 3 20 Turn knob to adjust waveform intensity Page 3 46 Push to turn cursors on or off Page 3 151 Turn the multipurpose knobs to adjust parameters selected from the screen interface Push a Fine button to toggle between normal and fine adjustment wi...

Страница 66: ...cons to reposition a waveform Drag across the waveform area to zoom the boxed waveform segment Also enable disable histograms and measurement gating Drag cursors to measure waveforms on screen Click icon to assign multipurpose knobs to waveform vertical position and scale Drag icon to change the trigger level ...

Страница 67: ...output CH 3 SIGNAL OUTPUT scale and offset controlled by CH3 controls Probe compensation output Ground terminal Channel inputs TDS7000B Series Floppy disk drive Recovered clock output Optical input O E converter electrical output Probe compensation output Ground terminal Channel inputs Recovered data output CSA7000B Series ...

Страница 68: ...rial port Lower XGA port to connect a monitor for instrument display PS 2 connectors for mouse and keyboard Parallel port Centronics to connect printer or other device GPIB port to connect to controller CD RW drive accessible from Windows Press to open CSA7000B Series Auxiliary external trigger input Auxiliary trigger output signal Analog CH 3 signal output scale and offset controlled by CH3 contr...

Страница 69: ... in this chapter provides background information needed to operate your instrument effectively as well as the higher level procedures for accessing and using the features These procedures emphasize using the front panel when possible H Lower level detailed usage procedures are in the online help system The table that follows on page 3 2 lists operating tasks and the sections in this chapter that d...

Страница 70: ... Set Acquisition Modes Set up of the acquisition system 3 29 To Start and Stop Acquisition Starting and stopping acquisitions 3 32 To Set Roll Mode Setting up roll mode 3 33 Acquisition Control Background Background information on acquisition controls 3 34 Using Fast Acquisition Mode Overview and setup of Fast Acquisition mode 3 40 To Turn Fast Acquisitions On and Off Turning fast acquisitions on ...

Страница 71: ...Trigger on a Runt Pulse Setting up runt pulse triggering 3 85 Trigger Based on Pulse Width Setting up pulse width triggering 3 87 To Trigger Based on Transition Time Setting up transition time triggering 3 89 Trigger Based on Pulse Timeout Setting up pulse timeout triggering 3 94 Trigger on a Pattern Setting up pattern triggering 3 95 To Trigger on a State Setting up state triggering 3 98 To Trigg...

Страница 72: ...veforms Overview of graticule and waveform adjustments you can make 3 137 Data Processing C l l ti Taking Measurements Measuring Waveforms Setup for measuring parameters 3 139 Calculation Taking Automatic Measurements Overview and setup for taking automatic measurements 3 140 To Take Automatic Measurements Set for automatic measurements 3 144 To Localize a Measurement Setup to measure a segment of...

Страница 73: ...ew of performing math operation on waveforms 3 168 ASin ACos ATan Sinh Cosh Tanh Average Invert Sqrt Log 10 Log e Exp Magnitude Real To Define a Math Waveform Defining math waveforms 3 175 Exp Magnitude Real Phase and Imag Operations on Math Waveforms Overview of measuring and adjusting math waveforms 3 177 To Use Math Waveforms Example setups for measuring and adjusting math waveforms 3 179 Spect...

Страница 74: ...ar References Setup to clear references 3 233 Exporting and Copying Waveforms Background and setup for exporting waveforms and using exported waveforms 3 235 To Export Your Waveform Exporting a waveform to a file 3 236 To Use an Exported Waveform Using an exported waveform in Excel 3 244 To Copy Your Waveform Copying a waveform to the clipboard 3 246 Printing Waveforms Background and setup for pri...

Страница 75: ... H Setting Acquisition Controls How to choose the appropriate acquisition mode for acquiring your waveforms how to start and stop acquisition H Acquisition Control Background Background information on the data sampling and acquisition process H Using Fast Acquisition Mode Using Fast Acquisition mode to capture and display transient events such as glitches or runt pulses often missed during longer ...

Страница 76: ...g topics H How to turn on channels and adjust vertical scale position and offset H How to set horizontal scale position and access record length and trigger position controls H How to get a basic trigger on your waveform NOTE Terminology This manual uses the terms vertical acquisition window and horizontal acquisition window throughout this section and elsewhere These terms refer to the vertical a...

Страница 77: ...s based on the characteristics of the input signal Autoset is much faster and easier than a manual control by control setup The instrument can also be reset to its factory default settings Usage of some input conditioning controls or features may be limited when other control settings are in effect Voltage offset is incompatible with reference waveforms because offset is an acquisition control Rea...

Страница 78: ... as DC coupling and GND coupling The input resistance of each input channel is 50 Ω To properly terminate signals in other impedance environments use an adapter All probes expect a specific coupling and input termination Both coupling and input termination resistance are displayed on screen Scaling and Positioning These key controls determine the portion of the input signal presented to the acquis...

Страница 79: ...ximum boundaries of the vertical acquisition window This limiting causes inaccuracies in amplitude related measurements Note that the acquisition window also includes 1 division above and below the displayed graticule area See Vertical Acquisition Window Considerations on page 3 18 Trigger and Display Set basic trigger controls to gate waveform acquisition and use the display to interactively scal...

Страница 80: ...isites 1 The acquisition system should be set to run continuously See page 3 29 for acquisition setup and page 3 63 for trigger setup Connect input signal 2 Connect to the signal to be acquired using proper probing and connecting techniques Note For more details on control over input setup push the Vert button to display the Vertical control window and then touch the HELP button Select the input s...

Страница 81: ...input signal from the acquisition Touch Close to close the window Note CSA7000B Series If the O E Electrical Out to CH1 adapter is installed the Termination Coupling and Bandwidth selections are replaced with Wavelength and Dark Level selections Set vertical acquisition window 5 Use the vertical knobs to scale and position the waveform on screen Positioned vertically Scaled vertically 6 Touch Vert...

Страница 82: ...zontally The Resolution knob sets the record length See discussion on page 3 21 If required to stabilize the display push LEVEL to set the trigger level to 50 Dragging the reference icon also positions the waveform For help 8 For more information on the controls described in this procedure push the Vert or Horiz button Touch the HELP button in the toolbar Continue with acquisition setup 9 To finis...

Страница 83: ...ing All channels in use are individually vertically scaled If you use Autoset when no channels are displayed the instrument turns on channel one CH 1 and scales it Execute Autoset Undo 3 The Autoset Undo control window opens automatically after an Autoset operation Touch Undo if you want to undo the last Autoset Only the parameters that were set by the last Autoset are undone Parameters that you c...

Страница 84: ...t and SCALE to display the signal You may want to revert to the factory default setup if so reset the instrument Overview To reset the instrument Control elements and resources Prerequisites 1 The instrument is powered up and running See Powering On the Instrument on page 1 9 Execute 2 Push the DEFAULT SETUP button You can get help on the vertical and acquisition controls by accessing online help ...

Страница 85: ...d input protection and dynamic range CAUTION To prevent damage to the acquisition system do not overdrive the inputs and observe static safe procedures Autoset Considerations Autoset acquires samples from the input signal and attempts to take the following actions based on the input data H Evaluate the amplitude range of the input signals and set the size and vertical offset of the vertical acquis...

Страница 86: ...n that you set determines the vertical size of the acquisition window allowing you to scale it to contain all of a waveform amplitude or only part Figure 3 2 on page 3 19 shows two vertical acquisition windows that contain the entire waveform but only one window contains the entire waveform in the graticule on screen NOTE Amplitude related automatic measurements for example peak to peak and RMS wi...

Страница 87: ...ndow Channel reference Indicator Graticule 0 5 Volt 0 5 Volt 1 0 Volt 1 0 Volt 1 1 Figure 3 2 Setting vertical range and position of input channels The vertical offset control affects the vertical acquisition window and the displayed waveform as follows H The vertical range window is always centered around the offset value It is the voltage level at the middle of the vertical acquisition window Wi...

Страница 88: ...cquisition window on the waveform Horizontal Acquisition Window Considerations The instrument lets you define the horizontal acquisition window that is set several parameters that determine the segment of an incoming signal that becomes the waveform record when acquired For background read Waveform Record on page 3 36 These common parameters specify a horizontal acquisition window that is applied ...

Страница 89: ...ntal position Figure 3 4 Horizontal Acquisition window definition Horizontal Scale Versus Record Length Versus Sample Interval Versus Resolution These parameters all relate to each other and specify the horizontal acquisition window Because the horizontal acquisition window must fit in the 10 horizontal division display for most cases you just set the duration of the horizontal acquisition window ...

Страница 90: ...uration decreases you set faster scale settings or Time Duration must increase forcing slower scale settings if Record Length increases you set longer record lengths The equation becomes Maximum Record Length Time Duration Min Sample Interval For example at 200 ps div and 10 divisions the record length must be 500 points Max Rec Length 10 divs x 200 ps div 4 ps sample Max Rec Length 500 samples NO...

Страница 91: ...zontal acquisition window determines the waveform records extracted from all signals present at all active channels You can think of the horizontal acquisition window as cutting across any input signals present in the input channels to extract the same slice of time into waveform records See Figure 3 5 Ch4 record Ch3 record Ch2 record Ch1 record Common horizontal position and delay Common trigger ...

Страница 92: ...ely The following table indicates which acquisition features and modes are incompatible with other features or modes Control Feature Incompatible with Explanation Average Single acquisition Acquisitions continue until the specified number of wave forms have been acquired and averaged Envelope Single acquisition Acquisitions continue until the specified number of wave forms have been acquired for t...

Страница 93: ... 15 bits 1 sign bit Round off errors and internal noise limit the effective bits for Hi Res mode and signal averaging to about 13 bits You can calculate the theoretical number of bits of enhancement using the following formula where Nd is the number of points acquired during a sample interval Bits of enhancement 0 5 log2 Nd Table 3 1 Additional resolution bits Sample Rate S s Nd extra samples Theo...

Страница 94: ...ode unlike Peak Detect gathers peaks over many trigger events H Average The instrument processes the number of waveforms that you specify into the acquired waveform creating a running average of the input signal This mode reduces random noise Acquiring and displaying a noisy square wave signal illustrates the difference between the modes Note how Average reduces the noise while Envelope captures i...

Страница 95: ... to 4999 points one acquisition is required and 5000 points are acquired For Single Sequence and Mask Pass Fail Testing a sample is only counted if the sample would be displayed in the graticule area In Single Sequence all eligible samples in an acquisition are counted In Mask Test with infinite persistence on all acquisitions acquired in a batch are counted In nondisplay persistence the minimum n...

Страница 96: ...Math and measurements work after you push STOP Untriggered Roll with Single Sequence Untriggered roll mode with single sequence displays newly acquired data points at the right edge of the waveform record while moving older waveform data points to the left Acquisitions automatically stop after a complete waveform record is acquired see Figure 3 6 Use untriggered roll with single sequence to observ...

Страница 97: ... or becomes stable at a faster time base setting your waveform was probably aliased To avoid aliasing be sure to sample the input signal at a rate more than twice as fast as the highest frequency component For example a signal with frequency components of 500 MHz would need to be sampled at a rate faster than 1 Gigasamples second to represent it accurately and to avoid aliasing The following tips ...

Страница 98: ...indow Select the acquisition mode Set waveform count average and envelope only 3 Touch an Acquisition Mode button to set the acquisition mode choose from the following modes H Sample H Peak Detect H Hi Res H Envelope H Average H Waveform Database For Average and Envelope modes only select the number of acquisitions to average or envelope For Waveform Database mode select the number of samples desi...

Страница 99: ...ab 7 Select the sampling mode H Equivalent Time uses both the real time and equivalent time sampling as appropriate see Table 3 2 on page 3 38 H Real Time Only limits the instrument to real time sampling Real Time Only prevents the very fast horizontal scale settings from being selected H Interpolated Real Time limits the instrument to real time sampling If the instrument cannot accurately get eno...

Страница 100: ... sure all the channels to be acquired are turned on use channel buttons see To Set Up Signal Input on page 3 12 if needed Then push the RUN button to begin acquiring To stop acquiring 3 Push the RUN STOP button to stop acquisition Acquisition will also stop if triggering ceases while in Normal trigger mode To take a single acquisition 4 Push the SINGLE button to start acquiring and acquire enough ...

Страница 101: ...3 Select Roll Mode AUTO to enable roll mode When the horizontal scale is 100 ms per division at a record length of 500 points and the acquisition mode is Sample or Pk Detect roll mode turns on As the record length becomes larger the time per division required to enter roll mode becomes slower Note Envelope Average FastAcq and Waveform Database acquisition modes inhibit roll mode To single sequence...

Страница 102: ...d Waveform Database acquisition modes inhibit roll mode Acquisition Control Background This section contains background information on the data sampling and acquisition process that can help you more effectively set up the acquisition window of each channel This section describes the following H The acquisition hardware H The sampling process sampling modes and the waveform record H Both the norma...

Страница 103: ...gnal parts within the vertical range of the amplifier are digitized See Figure 3 9 Input signal Sampled points Digital values 5 0 V 5 0 V 5 0 V 5 0 V 0 V 0 V 0 V 0 V Figure 3 9 Digital acquisition sampling and digitizing The instrument acquisition system can process the data as it is acquired averaging or enveloping the waveform data to produce enhanced waveform records Once the waveform record ex...

Страница 104: ...igger point H Horizontal Position If horizontal delay is off the time lapse from the first sample taken first point in the waveform record to the trigger point in percent of samples before the trigger When horizontal delay is off the trigger point and the horizontal reference are at the same point in the waveform record Sample interval First sampled and digitized point in record Horizontal referen...

Страница 105: ...es with each trigger event and eventually obtains enough samples to construct a waveform record The instrument makes multiple acquisitions of a repetitive waveform to obtain the sample density required for a waveform record See Figure 3 12 Equiva lent time sampling should only be used on repetitive signals The sampling speeds and the number of channels that you choose affect the mode the instrumen...

Страница 106: ...uivalent Time or Interpolated Sampling 2 5 ns Real time sampling Equivalent Time or Interpolated Sampling Equivalent Time or Interpolated Sampling 1 25 ns Equivalent Time or Interpolated Sampling Equivalent Time or Interpolated Sampling Equivalent Time or Interpolated Sampling 1 This table assumes a 500 point record length Longer record lengths cause the switch to equivalent time to occur at slowe...

Страница 107: ...trument then interpolates to create the intervening points in the displayed waveform If the time per division is set fast enough to require equivalent time but equivalent time is disabled the instrument interpo lates points There are two options for interpolation linear or sin x x The instrument can also equivalent time sample to acquire more samples see Equivalent Time Sampling on page 3 37 Linea...

Страница 108: ...t time sampling to obtain additional samples See Equivalent Time Sampling on page 3 37 Table 3 3 How interleaving affects sample rate Number of channels Maximum digitizing rate when real time sampling Number of channels in use CSA7404B TDS7704B TDS7404B TDS7254B TDS7154B One 20 GS sec 20 GS sec 20 GS sec 20 GS sec 20 GS sec Two 10 GS sec 10 GS sec 10 GS sec 10 GS sec 10 GS sec Three or Four 5 GS s...

Страница 109: ...mporarily turn off Fast Acquisitions mode Consider the mode that you want to use to acquire data Automatic Selection Fast Acquisitions automatically selects record length and sample rate to optimize the displayed image by optimizing live time and minimizing dead time Fast Acquisitions selects the sample rates and record lengths and compresses them to 500 pixels to produce the maximum display conte...

Страница 110: ...ensity on page 3 46 for more information Fast Acquisitions mode adds intensity or gray scale information like an analog instrument to each point in the waveform array The waveform array is a three dimensional array two dimensions of display pixels and a third dimension of pixel values Display pixel values are incremented each time they are written by a waveform acquisition ...

Страница 111: ...ions display Fast acquisitions display Fast acquisitions display Dead time Dead time Dead time Normal DSO mode Fast Acquisition mode 1st acquired waveform record Waveform memory bit maps Waveform memory Waveform memory Waveform memory Waveform memory bit maps Waveform memory bit maps Intensity controls Intensity controls Intensity controls Figure 3 13 Normal DSO Acquisition and Display mode versus...

Страница 112: ...and Fast Acquisition displays Use the procedure that follows to set up Fast Acquisitions mode Overview To turn Fast Acquisitions on and off Control elements and resources Prerequisites 1 The horizontal and vertical controls must be set up Triggering should also be set up See page page 3 29 for acquisition setup To Turn Fast Acquisitions On and Off ...

Страница 113: ...ouch the DISP button and select the Appearance tab 5 Select between Vectors Dots or Inten Samp display styles Dots is the default setting when in Equivalent Time ET acquisition mode Vectors is the default when not in ET acquisition mode 6 Select between Off Variable and Infinite Display Persistence Off is the factory default setting Variable persistence is explained on page 3 134 No Persistence er...

Страница 114: ...ess depend on the trigger rate creating a display like an analog instrument 11 To change the intensity setting for fast acquisition and waveform database waveforms touch FastAcq WfmDB and enter the intensity value with the keypad or the multipurpose knob To select the color palette 12 Touch the DISP button and select the Colors tab Normal Green and Gray give the appearance of an intensity graded d...

Страница 115: ...is mode is particularly useful for studying phase relationships When you set the VERTICAL POSITION and Vertical Offset to center the display in YT mode the XY display is at center screen and each division of display in YT mode produces a division of display in XY mode When you choose the XY format channels are assigned to the axis indicated in Table 3 4 and displayed as part of an XY pair If only ...

Страница 116: ...ignments X Axis source Y Axis source Intensity source CSA7000B Series and TDS7000B Series XY Ch 1 Ch 3 Ref1 Ref3 Ch 2 Ch 4 Ref2 Ref4 In fast acquisition XY Ch 1 Ch 2 q XYZ Ch 1 Ch 2 Ch 3 Using FastFrame FastFrame is an acquisition mode that lets you capture many records in a larger record and then view and measure each record individually FastFrame lets you quickly capture multiple acquisitions in...

Страница 117: ...rame sequence If any frames were acquired they are displayed If no frames were acquired the previous FastFrame waveform is displayed H Because FastFrame introduces additional processing time into the operation cycle of acquire process and display it is best to use Single Sequence Acquisition see Acquire menu Stop After menu With Single Sequence selected you will see the current acquisition sequenc...

Страница 118: ...ode Control elements and resources Prerequisites 1 The horizontal and vertical controls must be set up Triggering should also be set up See page 3 29 for acquisition setup and page 3 63 for trigger setup To set FastFrame mode 2 Touch the Horiz button Select the Acquisition tab from the Horiz Acq control window Touch FastFrame Setup to display the FastFrame Setup control window 3 Touch FastFrame to...

Страница 119: ...r the number of the specific frame you want to view The frame that you select appears on the display To view multiple frames 8 In the Frame Viewing controls touch Multiple Frames to toggle it to On 9 In the Frame Viewing control touch Start Frame and use the multipurpose knob or keypad to enter the number of the starting frame you want to view Touch of Frames and use the multipurpose knob or keypa...

Страница 120: ...eadouts on or off 3 In the Time Stamps controls touch Readouts to toggle time stamp readouts on or off H On displays time stamp readouts see Figure 3 17 on page 3 54 Time stamps are always acquired H Off turns off the display of time stamp readouts The displayed time uses the following format Sel Ch F xxx DD MMM YYYY HH MM SS mmm nnn ppp Ref Ch F xxx DD MMM YYYY HH MM SS mmm nnn ppp DD MMM YYYY HH...

Страница 121: ...ed Frame and Reference Frame as previously shown or you can set them from the Selection Controls window 6 Touch Selection Controls from the Time Stamps control window to display the FastFrame controls 7 In the FastFrame controls window touch Selected Frame Source and select the source of the frame you want to view 8 Touch Selected Frame Frame and use the multipurpose knob or keypad to enter the nu...

Страница 122: ...ontrols window 11 Touch either Frame Tracking Live or All to lock the reference and position frames together When the frames are locked they maintain the same relative distance from each other when either frame is adjusted H Live locks together the channel and math waveforms All reference waveforms are locked together but they are separate from the channel and math waveforms H All locks together a...

Страница 123: ...grity of optical connectors by keeping them free of contamination For cleaning information see Cleaning Optical Connectors on page 3 57 The instrument can couple to multimode fibers with a core diameter of 62 5 50 m or singlemode fiber with a core diameter of 9 m Alternate types can be coupled by use of UCI universal connector interface series adapters Refer to a current Tektronix catalog for deta...

Страница 124: ...ic female connector styles Some of the standard UCI interfaces supported are FC ST SC and DIN Refer to a current Tektronix catalog for details Clock and data recovery circuitry provides recovered clock and data outputs The signals are also available internally for use by the instrument Circuitry also provides electrical output from the O E optical to electrical converter RECOVERED DATA This output...

Страница 125: ...00B Series instruments while still allowing calibrated reference receiver mode Figure 3 19 Using the O E Electrical Out to Ch1 Input adapter Use the O E to SMA adapter if you need to connect the Electrical Out of the optical to electrical converter to input channels other than CH1 or if you need to connect the output to other equipment Store the O E to SMA adapter on the front of the O E Electrica...

Страница 126: ...ve a residue on optical connectors after drying Cleaning kits for optical connectors such as the Tektronix Optical Connector Cleaner kit number 020 2357 00 are available from a number of suppliers To clean optical connectors follow these steps 1 Remove the UCI adapter 2 Hold the can of compressed air upright and spray the can into the air to purge any propellant 3 Spray the clean compressed air on...

Страница 127: ...command For more information see Optimizing Measurement Accuracy on page 3 160 Compensation of the instrument also performs an optical dark level compensa tion Wavelength Filter and Bandwidth Selection CSA7000B Series To select the optical wavelength use the Vertical Setup menu This menu is shown in Figure 3 20 on page 3 59 Wavelength and Dark Level menus are not available unless the O E Electrica...

Страница 128: ...ative to a reference is defined as dB 10 logᏋ value reference Ꮠ For electrical bandwidths the reference of a system is commonly the response of the system to a sinusoidal frequency at or near DC The point at which the system response is one half would therefore be dB 10 logᏋ 0 5 response at DC Ꮠ 3dB In terms of frequency voltage and resistance the bandwidth is expressed as 3dB 10 logᏋV f 2 R V DC ...

Страница 129: ...ditional electrical bandwidth of 6 dB During testing of optical systems by impulse testing the resulting impulse waveform is converted to frequency by Fourier transform and the bandwidth is defined as 3 dB 10 log vertical swing at frequency vertical swing at DC During reference receiver curve calculation however the definition is changed to match the industry standard definition which assumes elec...

Страница 130: ...Acquiring Waveforms 3 62 CSA7000B Series TDS7000B Series Instruments User Manual ...

Страница 131: ...ring from the Front Panel which describes how to use the front panel triggering controls each of which is common to most of the trigger types the instrument provides H Additional Trigger Parameters which describes how to access common trigger functions in the Trigger control window H Advanced Triggering which describes trigger types that you can use to isolate specific signal phenomena H Sequentia...

Страница 132: ...ther trigger until the acquisition is complete and the holdoff time has expired The trigger source provides the signal that triggers acquisition Use a trigger source that is synchronized with the signal you are acquiring and displaying You can derive your trigger from the following sources H Input channels are the most commonly used trigger sources You can select any one of the four input channels...

Страница 133: ...sk testing You can trigger on the clock recovered from optical CSA7000B Series only or electrical communication signals H Serial optional on TDS7000B Series is a special trigger used on signals with serial data patterns You can trigger on the clock recovered from optical CSA7000B Series only or electrical communication signals The trigger mode determines how the instrument behaves in the absence o...

Страница 134: ...od that follows each acquisition You adjust holdoff to obtain stable triggering when the instrument is triggering on undesired trigger events as shown in Figure 3 23 A digital pulse train is a good example of a complex waveform See Figure 3 23 Each pulse looks like any other so many possible trigger points exist Not all of these will result in the same display The holdoff period allows the instrum...

Страница 135: ...ch coupling type Horizontal position is adjustable and defines where on the waveform record the trigger occurs It lets you choose how much the instrument acquires before and after the trigger event The part of the record that occurs before the trigger is the pretrigger portion The part that occurs after the trigger is the posttrigger portion When horizontal delay is off the reference marker shows ...

Страница 136: ...quential events When using sequential triggering the A trigger event arms the trigger system and then the B trigger event triggers the instrument when the B trigger condi tions are met A and B triggers can and typically do have separate sources The B trigger condition can be based on a time delay or a specified number of counted events See Sequential Triggering on page 3 103 to learn how to use th...

Страница 137: ... Push the TRIGGER SLOPE button to toggle between POS and NEG H POS triggers on a rising edge positive going signal H NEG triggers on a falling edge negative going signal You can also set the slope in the Trigger setup window H Either triggers on both the rising edge and falling edge of the signal select Either in the setup window To set level 4 To manually change the trigger level when edge trigge...

Страница 138: ...isrupted removed or heavily distorted the instrument may not acquire lock or may lose lock If the recovered clock is not locked to the incoming data the waveform display will not be stable Once the input data is available press the PUSH SET TO 50 knob to force the instrument to reacquire lock When using Comm triggering pushing the trigger PUSH SET TO 50 knob sets the levels for the selected code T...

Страница 139: ...ly the AC components of an input signal H HF REJ attenuates signals above 30 kHz H LF REJ attenuates signals below 80 kHz H NOISE REJ provides lower sensitivity reducing the chance of falsely triggering on noise To select the trigger mode 8 Push the TRIGGER MODE button to toggle between NORMAL and AUTO trigger modes H NORMAL trigger mode requires a trigger to acquire a waveform H AUTO trigger mode...

Страница 140: ...rm H READY on the instrument can accept and is waiting for a valid trigger to occur H ARM on the trigger circuitry is filling the pretrigger portion of the waveform record H TRIG D and READY on valid A trigger recognized waiting for a delayed trigger When a delayed trigger is recognized the posttrigger portion of the delayed waveform will fill H ARM TRIG D and READY off the digitizer is stopped Tr...

Страница 141: ...dicator shows only the trigger level It remains on screen regardless of the horizontal position as long as the channel providing the trigger source is displayed You can choose between two types of trigger level indicators a horizontal bar or an arrow at the right side of the graticule Trigger point indicator shows the trigger position on the waveform record Trigger level indicator shows the trigge...

Страница 142: ...e or Random H The Auto holdoff varies with the horizontal scale and is equal to 5 divisions times the current time division setting Auto maintains a good value for multipurpose triggering H Time lets you enter a holdoff that may allow more stable triggering than the Auto holdoff This time is used at all horizontal scale settings H Random selects a new random holdoff time for each acquisition cycle...

Страница 143: ... keyboard icon to display the keyboard Select either TTL ECL or USER H TTL fixes the trigger level at 1 4 V H ECL fixes the trigger level at 1 3 V H USER fixes the trigger level at the USER preset voltage When you set the volts div smaller than 200 mV the instrument reduces the TTL or ECL trigger levels below standard TTL and ECL levels This reduction occurs because the trigger level range is fixe...

Страница 144: ...he ADVANCED front panel button to display the trigger control window 2 Select the A Event or B Event tab and select the Edge trigger type 3 To force the instrument to immediately acquire one waveform record even without a trigger event touch the Force Trigger button Forcing a trigger is useful when in normal trigger mode and the input signal is not supplying a valid trigger By touching Force Trigg...

Страница 145: ...ggering The instrument can trigger on glitch or runt pulses or it can trigger based on the width slew rate or timeout period of a pulse These capabilities make the instrument suitable for such tasks as unattended monitoring for and capturing of a power supply glitch or GO NO GO slew rate testing of operational amplifiers This subsection describes how to use advanced triggers glitch runt width tran...

Страница 146: ...ut Read the following topics they provide details that can help prevent false steps in setting up to trigger on your waveforms Glitch Trigger A glitch trigger occurs when the trigger source detects a pulse narrower or wider than some specified time It can trigger on glitches of either polarity Or you can set the glitch trigger to reject glitches of either polarity Runt Trigger A runt trigger occur...

Страница 147: ...eout Trigger A timeout trigger occurs when the trigger source does not detect an expected pulse transition If the pulse transition occurs prior to a specified timeout time the expected case then no trigger results Pattern Trigger A pattern trigger occurs when the logic inputs to the logic function that you select cause the function to become TRUE or at your option FALSE When you use a pattern trig...

Страница 148: ...rn and state types 3 The logic inputs are channels 1 2 3 and 4 when using Pattern triggers For State triggers channel 4 becomes the clock input leaving the remaining channels as logic inputs State Trigger A state trigger occurs when the logic inputs to the logic function cause the function to be TRUE or at your option FALSE at the time the clock input changes state When you use a state trigger you...

Страница 149: ...r transitions occurring within the setup hold violation zone If any occur the instrument triggers with the trigger point located at the clock edge Positive settings for both setup and hold times the most common application locate the setup hold violation zone so it spans the clocking edge See the top waveform in Figure 3 26 The instrument detects and triggers on data that does not become stable lo...

Страница 150: ...TH Hold time Setup Hold violation zone TS TH TS TH must be 500 ps Clock signal Clock level Clock signal Clock level Negative TS Positive TH Positive TS Negative TH TH TH TS TH TS TS Setup Hold violation zone Setup Hold violation zone Setup Hold violation zone Figure 3 26 Violation zones for Setup Hold triggering ...

Страница 151: ...y for the signal to be acquired See page 3 23 for acquisition setup Select glitch triggering 2 From the toolbar touch Trig select the A Event tab of the Trigger control window and touch Select 3 Touch Glitch Select the source 4 To specify which channel becomes the trigger source touch Source and select the source from the list Select the polarity and width 5 To specify the glitch polarity touch Po...

Страница 152: ...ch Glitch Trigger Level and use the multipurpose knobs keypad or front panel LEVEL knob to set the glitch trigger level Note You can set the level to a value appropriate to either TTL or ECL logic families To do so touch Level and select the keypad touch either TTL or ECL Logic qualify the trigger 9 To logic qualify the trigger see Logic Qualify a Trigger on page 3 102 To set mode and holdoff 10 M...

Страница 153: ... from the list The source selected becomes the trigger source for Glitch Runt Width and Transition Select the polarity 4 To specify the direction of the runt pulse touch Polarity and select Pos positive Neg negative or Either from the window H Pos looks at positive going pulses H Neg looks at negative going pulses H Either looks at both positive and negative pulses Set to trigger when To determine...

Страница 154: ... the threshold must be crossed for a runt trigger to occur H Positive requires that the lower threshold must be first crossed going positive then recrossed going negative without the upper threshold being crossed at all H Negative requires that the upper threshold must be first crossed going negative then recrossed going positive without the lower threshold being crossed at all H Either requires o...

Страница 155: ...on a pulse narrower or wider than some specified range of time defined by the upper limit and lower limit To set up for width triggering do the following procedures Overview Trigger based on pulse width Control elements and resources Select width triggering 1 From the toolbar touch Trig select the A Event tab of the Trigger control window and touch Select 2 Touch Width Select the source 3 To speci...

Страница 156: ...Upper or Lower Limit and enter the values with the multipurpose knob or keypad H Upper Limit is the maximum valid pulse width the trigger source will look for H Lower Limit is the minimum valid pulse width The instrument will always force the Lower Limit to be less than or equal to the Upper Limit Set the level 7 Touch Level and use the multipurpose knob or keypad to set the trigger level Logic qu...

Страница 157: ...on Select the source 3 To specify which channel becomes the trigger source touch Source and select the source from the list Select slope 4 To specify the direction of the pulse edge touch Slope and select Pos positive Neg negative or Either from the window H Pos monitors the transition time slew rate of the positive going edges of pulses The edge must first cross the lower threshold and then cross...

Страница 158: ...lues for the upper and lower levels Note You can set the level to a value appropriate to either TTL or ECL logic families To do so touch Level and select the keypad touch either TTL or ECL To use the Trigger Bar to set the threshold levels touch the Disp button select the Objects tab and then touch Long to display the long trigger bar The level settings determine the voltage component of slew rate...

Страница 159: ...be because the pulse edge is too fast rather than too slow To check the edge speed switch to edge triggering Then trigger on the pulse edge and determine the time the edge takes to travel between the levels set in the slew rate Thresholds menu The instrument cannot transition trigger on pulse edges that traverse between threshold levels in 600 ps or less Also to reliably transition trigger a pulse...

Страница 160: ...ggering 1 Push the front panel ADVANCED button 2 On the Trigger Setup control window select the A Event tab and touch Select 3 Touch Window Select the source 4 To specify which channel becomes the trigger source touch Source and select the source from the list Set the thresholds 5 The upper and lower threshold levels define the voltage limits of the window To set the threshold levels touch Upper L...

Страница 161: ...e signal enters or leaves the window defined by the threshold levels for the time specified by Time H Window Event and Trigger if Window Logic When the instrument detects a signal entering or leaving the window defined by the threshold levels it checks the logic state of up to two other available channels and triggers only if their conditions are met For more information on qualifying triggers see...

Страница 162: ... tab of the Trigger control window and touch Select 2 Touch Timeout Select the source 3 To specify which channel becomes the trigger source touch Source and select the source from the list Set to trigger when 4 Touch Stays High Stays Low or Either from the Trigger When window H Stays High causes a trigger if the signal stays higher than the trigger level for longer than the timeout value H Stays L...

Страница 163: ...tandard trigger types See To set holdoff on page 3 74 and To select the trigger mode on page 3 71 for mode and holdoff setup To learn more about trigger mode and holdoff see Trigger Modes on page 3 65 and Trigger Holdoff on page 3 66 When you select the type Pattern the instrument will trigger when the inputs to the logic function that you select cause the function to become TRUE or at your option...

Страница 164: ...el threshold and use the multipurpose knobs keypad or threshold presets to set each threshold To define the logic 6 To choose the logic pattern type you want applied to the input channels touch an available type from the Pattern Type window See Table 3 5 on page 3 80 for definitions of the logic functions for both pattern and state triggers To set trigger when 7 To choose to trigger when the logic...

Страница 165: ...than the time you specify Conversely the TRUE for More Than item requires the boolean function to be TRUE for longer than the time that you specify Note the position of the trigger indicator Triggering occurs at the point that the instrument determines that the logic function that you specify is TRUE within the time that you specify The instrument determines the trigger point in the following mann...

Страница 166: ...ouch Select 2 Touch State Define inputs 3 To set the logic state for each of the input channels Ch1 Ch2 Ch3 and Ch4 touch each Input Threshold and select either High H Low L or don t care X from the menu The choices for Ch4 are rising POS edge and falling NEG edge Set thresholds 4 To set the logic threshold for each channel select the channel threshold and use the multipurpose knob or keypad to se...

Страница 167: ...o select the trigger mode on page 3 71 for mode and holdoff setup To learn more about trigger mode and holdoff see the descriptions Trigger Modes on page 3 65 and Trigger Holdoff on page 3 66 When you select the type Setup Hold the instrument uses one channel as a data channel the factory default setting is Ch1 another channel as a clock channel default is Ch2 and triggers if the data transitions ...

Страница 168: ... sources 5 To select the edge to use to clock select either Pos or Neg from the Clock Edge window Set the data and clock levels To set the transition levels that the clock and data must cross to be recognized by the instrument 6 Touch Data Level and use the multipurpose knobs or keypad to set the data level 7 Touch Clock Level and use the multipurpose knobs or keypad to set the clock level Note Yo...

Страница 169: ...duce the 2 ns limit adjusts the other time to maintain the limit In most cases you will enter positive values for both setup and hold time Positive values set the instrument to trigger if the data source is still settling inside the setup time before the clock or if it switches inside the hold time after the clock You can skew this setup hold violation zone that the setup and hold times form by en...

Страница 170: ...se the function to become TRUE or at your option FALSE To logic qualify a trigger do the following proce dures Overview Trigger on a pattern Control elements and resources Prerequisites 1 The instrument must be installed and operating The acquisition system should be set to Run and the vertical and horizontal controls should be set appropriately for the signal to be acquired See page 3 23 for acqu...

Страница 171: ...for each channel select the channel threshold and use the multipurpose knob or keypad to set each threshold To define the logic 7 To choose the logic pattern type you want applied to the input channels touch an available type from the Pattern type window See Table 3 5 on page 3 80 for definitions of the logic functions For further assistance 8 Touch the Help button while in the Trigger setup windo...

Страница 172: ...e details that can help prevent false steps in setting up to trigger on your waveforms Trigger Sources In most cases it makes sense to set separate trigger sources for the A Main and B Delayed triggers Line is not available as a source for the B trigger Trigger Types When using sequential triggering both the A trigger and B trigger systems can be set independently to any one the following types Ed...

Страница 173: ...ent A trigger source B trigger source B trigger point Start posttrigger acquisition on first B trigger after delay Waveform record A trigger source B trigger source Trig After Time A Main Only Pretrigger record Posttrigger record Waveform record Waveform record A trigger point A trigger point B trigger point Start posttrigger acquisition on nth B event Figure 3 28 Triggering with Horizontal Delay ...

Страница 174: ...g on nth Event when horizontal delay is on Each illustration shows where pretrigger and posttrigger data is acquired relative to the trigger event Horizontal delay Horizontal delay A trigger point Start posttrigger acquisition A trigger source Waveform record A Main Only with Horizontal Delay Pretrigger record Posttrigger record Waiting for nth event where n 4 Trig on nth Event with Horizontal Del...

Страница 175: ... input signal that you specify enters a state that you specify H before an input signal that you specify transitions in a direction that you specify NOTE A minimum of 100 ns must exist between the B Event that triggers the oscilloscope and any B Event occurring after Reset becomes TRUE Since any number of intervening B Events may occur the 100 ns limit is usually not a problem except when the B Ev...

Страница 176: ... the user specified number of B trigger events1 B trigger on events with horizontal delay off B trigger on events with horizontal delay on Wait user specified horizontal delay time B trigger after delay with horizontal delay on Wait for B trigger event1 Wait user specified horizontal delay time Trigger on A Only with horizontal delay on Trigger on A Only with horizontal delay off Reset1 1If Reset ...

Страница 177: ...occurs before the B trigger event occurs Use the procedure that follows when setting up the instrument to trigger on a sequence For more information display online help while performing the procedure Overview To trigger on a sequence Control elements and resources Prerequisites 1 The instrument must be installed with a signal connected to an input channel Acquisition system should be set to Run an...

Страница 178: ...g Level and use the multipurpose knob or keypad to set the level 5 If using any other trigger type see To set up B triggering on page 3 115 To trigger on B events 1 To set the time base to trigger after an A trigger and a specified number of B trigger events from the toolbar touch Trig and select the A B Seq tab of the Trigger control window 2 Touch A Then B Trig on nth Event 3 To set the number o...

Страница 179: ... long as the state is true To reset sequential triggers Cont 2 If the Timeout Type of Trigger Reset is selected touch Time and use the multipurpose knobs or keypad to set the reset time The reset time is the time from the A trigger that you want to reset the sequential triggers if the B trigger has not occurred If the reset occurs the instrument does not trigger If the reset occurs the instrument ...

Страница 180: ...ion from the list Touch Level and use the multipurpose knobs or keypad to set the level that the source must pass through to reset the triggers In the example the runt trigger A event occurs on the falling edge of the pulse on Ch1 The trigger delay expires 1 s after the falling edge of the pulse on Ch1 Ch2 provides the B events and Ch3 provides the reset event The reset event window is from the A ...

Страница 181: ...nd use the multipurpose knobs or keypad to set the threshold that the source must be in to reset the triggers In the example the runt trigger A event occurs on the falling edge of the pulse on Ch1 The trigger delay expires 1 s after the falling edge of the pulse on Ch1 Ch2 provides the B events and Ch3 provides the reset event The reset event window is from the A event to the reset event at the ri...

Страница 182: ...ring 3 114 CSA7000B Series TDS7000B Series Instruments User Manual Overview Control elements and resources To trigger on a sequence Cont Reset event start B event End of trigger delay A event Reset event end ...

Страница 183: ...opriate settings in the controls that displayed from step 2 For assistance click Help from the toolbar to display help on the controls You can also read about setting up the various trigger types in the procedures that follow Just remember to select the B Event tab not the A when setting up B trigger types H To Trigger on a Glitch on page 3 83 H To Trigger on a Runt Pulse on page 3 85 H Trigger Ba...

Страница 184: ...ect the A B Seq tab of the Trigger control window 2 Set the Trigger Reset Type in the pulldown menu The controls that are appropriate to your selection appear Note Selections for Reset vary with the B trigger type you select 3 Set the time or specify the state or transition that forces reset To not reset set to None For further assistance 4 Touch the Help button in the Trigger control window to ac...

Страница 185: ...anced by combining serial trigger and signal averaging to reduce random noise You can specify patterns with up to 64 bits including don t care bits The serial trigger system can be clocked from an external source or from internal clock recovery Serial pattern trigger operates on NRZ encoded signals at data rates up to 1 25 Gb s For detailed information on using serial pattern triggering to trigger...

Страница 186: ...Triggering 3 118 CSA7000B Series TDS7000B Series Instruments User Manual ...

Страница 187: ...Waveform Display H Setting MultiView Zoom Controls H Customizing the Display Acquisition system Input Display Storage Waveform transform system Horizontal timebase Trigger Using the Waveform Display The waveform shown below is displayed as part of the User Interface UI application The UI application takes up the entire screen of the instrument and the graticule takes up most of the UI application ...

Страница 188: ...Displays the scale or magnified and unmagnified waveforms 4 Horizontal reference A control that you can position to set the point around which channel waveforms expand and contract horizontally on screen as you change the Horizontal Scale control or push the MultiView Zoom button The reference is also the trigger point when the horizontal delay is 0 Touch Screen not shown A feature that lets you t...

Страница 189: ... you set up the instrument display so that it best supports your data analysis tasks Waveform Display In general the method of displaying a waveform is to define the waveform if necessary math and reference waveforms and then turn it on Table 3 6 summarizes this process as it applies to the different waveforms Table 3 6 Defining and displaying waveforms Waveform To define To turn on Channel Ch1 Ch...

Страница 190: ...n fast acquisitions mode or waveform database mode cannot be repositioned or rescaled Graticules Select a graticule size from the Graticule Size drop down list in the Zoom Setup window to change the size of the acquisition waveform and zoomed waveform windows The 50 50 selection allocates half of the available display for the zoomed graticule and half of the available display for the acquisition w...

Страница 191: ...ollowing descriptions for more information H Vertical Acquisition Window Considerations on page 3 18 H Horizontal Acquisition Window Considerations on page 3 20 Horizontal Position and the Horizontal Reference The time values that you set for horizontal position are from the trigger point to the horizontal reference point This is not the time from the trigger point to the start of the waveform rec...

Страница 192: ...hannel button lights when its channel is on Note For information on math waveforms see To Define a Math Waveform on page 3 175 For information on reference waveforms see Saving and Recalling Waveforms on page 3 227 4 Use the Vertical knobs to achieve a good display of each waveform that you select Set horizontal display parameters 5 To make sure the main graticule is selected push the MultiView Zo...

Страница 193: ...xpands to fill the 10 divisions on screen touch and drag across the segment of the waveform that you want to see in greater detail Then select Zoom 1 On Zoom 2 On Zoom 3 On or Zoom 4 On from the list to magnify the highlighted waveform segment Note The instrument displays the box enclosed area on the waveform magnified in the graticule Both vertical and horizontal zoom functions are available Zoom...

Страница 194: ...or contracts one waveform at a time unless zoom lock is on Also the instrument only vertically positions one waveform at a time when in MultiView Zoom When zooming horizontally MultiView Zoom expands all waveforms at the same time When zooming horizontally or vertically MultiView Zoom expands or contracts the waveform by the zoom scale factor Use the procedure that follows to zoom a waveform For m...

Страница 195: ...r Zoom 4 On to magnify the highlighted waveform segment in one of the 4 zoom areas Note The instrument displays the box enclosed area on the waveform magnified in the graticule If two graticules are shown the magnified waveform is shown in the bottom graticule H Push the MultiView Zoom button to split the screen and add a zoom graticule If the instrument creates two graticules the magnified wavefo...

Страница 196: ... zoom factor or move the unmagnified waveform relative to the box the instrument alters the magnified display accordingly to include only the waveform portion within the box As you change the zoom factor or move the magnified waveform the instrument scales or moves the box relative to the unmagnified waveform so that the box encloses only the magnified portion of the waveform If multiple waveforms...

Страница 197: ...and Zoom windows H 50 50 allocates half of the available display for the zoomed graticule and half of the available display for the acquisition window H 80 20 allocates 80 of the available display for the zoomed graticule and 20 for the acquisition window H 100 uses the entire display for the zoomed graticule Note The instrument displays the box enclosed area on the waveform magnified in the grati...

Страница 198: ...actor of the selected zoom area H From the Zoom Setup window touch the Vertical or Horizontal Position or Factor controls to assign the multipurpose knobs to the factor and position controls H Use the multipurpose knobs or keypad to change the zoom position and factor The knob readout also displays the zoom position and factor You can also use the up and down arrows to change the zoom factor Reset...

Страница 199: ...rd H Fast forward H Reverse H Fast reverse H Stop 16 To change the scrolling speed touch Scroll Speed and use the multipurpose knobs or keypad to change the scrolling speed For further assistance 17 Touch the Help button while in the Zoom setup window to access a context sensitive overview of the MultiView Zoom controls and their setup See Accessing Online Help on page 3 263 for an overview of the...

Страница 200: ... between the dots Choose Intensified Samples to display actual samples as bright dots Screen Text Display Screen Text Enter text that you can display and position on screen Also see Disp Screen Text Enter text that you can display and position on screen Also see Label The Waveform on page 3 229 Color Palette Record View and Waveform Data base Display Colors Choose Normal to use system colors for b...

Страница 201: ...veforms Display format Display Appearance Choose YT XY or XYZ display formats For additional information see To Set Display Format on page 3 47 Display format Display Appearance Choose YT XY or XYZ display formats For additional information see To Set Display Format on page 3 47 Waveform Display Disp Appearance Toggle the waveform display on and off Some processes are faster if waveforms are not d...

Страница 202: ...Interpolation When due to preview zoom or Real Time mode with limited samples the available sample density falls to less than 1 sample per display column the instrument calculates intermediate points by either the linear or sine algorithms and uses them to produce points There are two options for interpola tion H Sin x x interpolation computes record points using a curve fit between the actual val...

Страница 203: ...istence choose a persistence mode H Off displays Waveforms with new data replacing the data from previous waveform acquisitions no persistence H Infinite persistence continuously accumulates record points until you change an acquisition setting H Variable persistence accumulates record points for a specified time Each point decays in a set time interval 4 From display Style select an available sty...

Страница 204: ...re resulting in a build up of data in the displayed waveforms H Variable Persistence to make data persist momentarily but also decay New waveform displays accumulate data as new waveform records acquire but with continuous replacement of the oldest data If you select Variable Persistence set a time at which the oldest data fades away H Off to make data display for the current acquisition only H Re...

Страница 205: ...e 3 63 for trigger setup Change waveform colors 2 From the Display setup control window select the Colors tab 3 Choose a color palette from the Color Palette list Normal Green and Gray give the appearance of an intensity graded display similar to an analog instrument Spectral and Temp use hue to indicate the frequency of occurrence and to highlight events User and User Palette let you create a cus...

Страница 206: ...lect the Objects tab 7 Touch Display Date Time to toggle between On and Off On displays the date and time 8 Touch Display Trigger T to toggle between On and Off On displays the trigger T at the trigger location For further assistance 9 Touch the Help button in the toolbar to access a context sensitive overview of the display controls and their setup See Accessing Online Help on page 3 263 for over...

Страница 207: ...e Figure 3 34 H Taking Cursor Measurements on page 3 151 describes using cursors to make measurements on waveforms See Figure 3 34 H Taking Histograms on page 3 157 describes how to take histograms to view the horizontal or vertical distribution of data on your waveforms H Optimizing Measurement Accuracy on page 3 160 tells you how to run compensation routines and how to deskew channels to optimiz...

Страница 208: ...waveform record points and Fast Ac quisitions mode and Waveform Database mode measurements use a multidimen sional array of points automatic measurements are usually more accurate than cursor and graticule measurements And the instrument does the work continu ously taking updating and displaying these measurements Some features of automatic measurements follow Annotate Waveforms On Screen You can ...

Страница 209: ...n of the measurement results See Display measurement statistics on page 3 146 for more information Select Measurement Parameters You can select from an extensive range of parameters to measure for a list see Appendix B Automatic Measurements Supported Measure Part of a Waveform You can feed the entire waveform to a measurement or limit the measurement to a segment of the waveform By default the in...

Страница 210: ...on Ch1 Ch4 Math1 Math4 Ref1 Ref4 or a histogram Measurement Sources All channel reference and math waveforms can serve as sources for automatic measurements Some measurements such as delay and phase require two sources For example delay would be used to measure an input from one measurement source for example C1 with respect to an output in another source C2 High Low Method The levels that the aut...

Страница 211: ...setting is best for examining eye patterns and optical signals See Figure 3 36 H Noise Optional on TDS7000B Series Tells the instrument if the noise measurement is at the top or the bottom of the eye diagram H Signal Type Optional on TDS7000B Series Lets the instrument know if the signal to be measured is a pulse waveform or an eye diagram Reference Levels Method A second set of levels affect the ...

Страница 212: ...the reference levels are calculated are the levels established using the selected Hi Low method described on page 3 142 Use the procedure that follows to quickly take a measurement based on the default settings for High Low and for reference levels Overview To take automatic measurements Related control elements and resources Prerequisites 1 Obtain a stable display of the waveform to be measured S...

Страница 213: ... this instrument can take see Appendix B Automatic Measurements Supported The readout for the measurement is automatically displayed and the measurement is added to the measurement list in the setup window Measurements are displayed below the graticule area as shown here If the area is occupied or there are too many measurements to fit in that area measurements are displayed in the lower graticule...

Страница 214: ...ents included in the measurement statistics touch Weight n and use the multipurpose knobs or keypad to set the weighting Annotate measurements Measurement annotation graphically shows the position on the waveform of the elements from which the measurement result is derived Horizontal bars vertical bars horizontal arrows and vertical arrows indicate the elements used by the measurement See Measurem...

Страница 215: ...ct the Measurement tab to display the Annotation Type setup window 15 From the window select either the Standard or Detailed annotation type Selecting Detailed displays more annotations than selecting standard Set measurement reference levels 16 From the Measurements control window touch Setup Ref Levs to display the Reference Levels setup control window 17 To use these settings for all measuremen...

Страница 216: ...H Histogram Selects the most common values above or below the midpoint Since this approach ignores short term aberrations overshoot ringing and so on Histogram is the best setting for examining pulses See Figure 3 36 on page 3 143 H Histogram mean Calculates the mean value using all values either above or below the midpoint depending on whether it is defining the high or low reference level Histog...

Страница 217: ...in button To select the type of snapshot measurements touch one of the Snapshot Type buttons H Comm Selects snapshots of Comm measurements optional on TDS7000B Series H General Selects all single waveform measure ments Phase Delay and Histogram measurements are not included in a snapshot For further assistance 23 Touch the Help button in the Measurements setup control window to access the online a...

Страница 218: ...gated area touch Measurement Gating Cursor Zoom 1 Zoom 2 Zoom 3 Zoom 4 or Off H Cursor Sets the gated area to the area between the cursors Use the multipurpose knobs to adjust the cursors on screen such that the area to measure is between the cursors H Zoom 1 4 Sets the gated area to the waveform area contained in the Zoom graticule H Off Turns off measurement gating Turning V Bar cursors off will...

Страница 219: ...spect to H V1 Level Cursor 1 with respect to its source ground level H V2 Level Cursor 2 with respect to its source ground level H ΔV Level Cursor 2 Level at Cursor 1 Level is cursor displacement from the source ground times the source volts div Note that the two cursors may have different sources and therefore can have different volts div settings Vertical cursors T Vertical cursors measure dista...

Страница 220: ... 1 and Cursor 2 You can move cursors with the multipurpose knobs or the cursor position controls in the Cursor Setup control window 2 divisions at 20 mv div Figure 3 38 Horizontal cursors measure amplitudes Cursors are Display Limited You cannot move a cursor off screen Also if you resize waveforms the cursors do not track That is a cursor stays at its screen position ignoring changes to horizonta...

Страница 221: ... div or about 60 mV H Note that the value of each graticule division is not readily apparent relative to the delta readout because the delta amplitude readout Δv must account for the different amplitude scale settings of the sources To do so the Δv readout displays the results of v2 v1 60 mV 300 mV 240 mV automatically accounting for the different scales of the cursor sources NOTE If a cursor read...

Страница 222: ...t measures amplitude or time will read out in the units of its source as indicated in Table 3 10 Note mixed sources require Delta Cursor readouts to follow units of the cursor 1 source Table 3 10 Cursor units Cursors Standard units1 Readout names Horizontal volts watts V1 V2 ΔV Vertical seconds bits T1 Τ2 ΔT F1 F2 ΔF Waveform Screen volts watts seconds bits V1 V2 ΔV T1 T2 ΔT 1 If the V1 and V2 uni...

Страница 223: ...URSORS front panel button or from the toolbar touch Cursors Select the cursor sources 3 From the Cursor Source menu select the channel math or reference tab and then select the waveform to take cursor measurements on If you are using Waveform or Screen cursors your must select a source for both cursors by first touching a cursor button before selecting a source Note If a waveform is not available ...

Страница 224: ... fixed horizontal or vertical distance between each other 8 To return to the Cursor controls window touch the Controls button 9 To toggle the display of cursors on or off touch the Cursor button Note All adjustments that you can make in the Cursor controls window can also be made in this window Set cursor style 10 To change the waveform and screen cursor marker style from the Cursor controls windo...

Страница 225: ...structed from the selected waveform data You can display both vertical voltage and horizontal time histograms but only one at a time Use histogram measurements to get statistical measure ment data for a section of a waveform along one axis Horizontal histogram Histogram measurements Figure 3 40 Horizontal histogram view and measurement data ...

Страница 226: ...ng and data accumulation A sample histogram display is shown in Figure 3 40 Histogram data is continuously accumulated until you explicitly turn off histograms This allows you to continue collecting histogram data even when you turn off the histogram display Use the procedure that follows to quickly take a measurement based on the default settings for histograms Overview To start and reset histogr...

Страница 227: ...histogram box H Off Turns off histogram counting and display Note This control turns on histogram counting and data display You can only display one type of histogram at a time 5 Touch Reset to reset the histogram count Histograms track numbers of counts Touching Reset resets those counts to zero and begins counting from zero Set histogram display options 6 Touch Display to toggle the display of t...

Страница 228: ...s given here will increase the accuracy of the measurements that you take This instrument can compensate itself and the attached probes optimizing the internal signal path used to acquire the waveforms you measure Compensation optimizes the capability of the instrument to take accurate measurements based on the ambient temperature If you are using optical signals CSA7000B Series only see Optical D...

Страница 229: ...g steps to calibrate the instrument Note Signal Path Compensation is the only calibration that is accessible to users Calibrate the instrument 4 Touch Calibrate to start the calibration Calibration may take several minutes Calibration is complete after Working is no longer displayed in the Calibrate button and Running is no longer displayed in the Status readout Check the calibration status 5 The ...

Страница 230: ...ou can adjust a relative time delay for each channel This lets you align the signals to compensate for signals that may come in from cables of differing lengths The instrument applies deskew values after it completes each acquisi tion therefore the deskew values do not affect logic triggering Also deskew has no affect on fast acquisition XY and XYZ display formats To deskew channels use the proced...

Страница 231: ...arm up See page 3 29 for acquisition setup and Power on the Instrument on page 1 9 Use adapter 2 If your probe is a 1 M Ohm probe without a TCA interface connect it to the instrument using a TCA 1MEG adapter Low frequency compensation 3 Connect fixture to the instrument see To Connect Probe Calibration Fixture on page 3 162 4 Connect one probe to the fixture 5 Push the AUTOSET button on the instru...

Страница 232: ...S7000B Series Instruments User Manual Overview Related control elements and resources To compensate passive probes Cont For further assistance 8 Touch the Help button to access the online assistance See page 3 263 to learn about using online help ...

Страница 233: ...ults are reported live providing real time feedback Mask hits are highlighted on the display and accompanied by readouts indicating the number of waveforms tested pass fail results and hit counts Figure 3 42 Pass Fail mask testing If the Bessel Thompson filter is on the instrument is an optical reference receiver For detailed information on using Serial Mask Testing to test your signals for compli...

Страница 234: ...Measuring Waveforms 3 166 CSA7000B Series TDS7000B Series Instruments User Manual ...

Страница 235: ... your original waveform note that the background noise you subtract must be identical to the noise in your signal Or you can integrate a single waveform into an integral math waveform as shown below Source waveform Math waveform With spectral analysis you can analyze waveforms in the frequency domain The interface is similar to a dedicated spectrum analyzer relieving you of the burden of knowing t...

Страница 236: ...s that result from H Mathematical operations on one or several waveforms add subtract multiply and divide H Logical operations greater than less than less than or equal greater than or equal not equal or equal H Variables that you set H Regular scalars such as 3 14 H Function transforms of waveforms such as integrating differentiating and so on H Spectral analysis of waveforms such as an impulse H...

Страница 237: ...ror because a circular definition is not allowed H Measurements Meas1 Meas8 are allowed in a math definition but not measurement functions such as rise Ch1 CSA7000B Series TDS7000B Series H Fast Acquisition Math is not allowed in Fast Acquisition mode H Roll Mode Math is updated when acquisition is stopped The following topics provide details that can help you create the math waveform that best su...

Страница 238: ...rms can incorporate the following sources H Channel waveforms H Reference waveforms H Measurements automated measurements that measure channel reference histogram or math waveforms H Math waveforms Source Dependencies Math waveforms that include sources as operands are affected by updates to those sources H Shifts in amplitude or DC level of input sources that cause the source to clip also clips t...

Страница 239: ...ryOperator Term Term BinaryOperator Scalar Term Waveform Expression Scalar Integer Float Meas Result Variable Waveform ChannelWaveform ReferenceWaveform MathWaveform ChannelWaveform Ch1 Ch2 Ch3 Ch4 ReferenceWaveform Ref1 Ref2 Ref3 Ref4 MathWaveform Math1 Math2 Math3 Math4 UnaryOperator Average Integral Derivative Invert Sqrt Exp log 10 log e Fabs Sin Min Max Ceil Cos Tan ASin Sinh ACos Cosh ATan T...

Страница 240: ...tiated The math waveform derived from the sampled waveform is computed based on the following equation Yn X n 1 Xn 1 T Where X is the source waveform Y is the derivative math waveform T is the time between samples Since the resultant math waveform is a derivative waveform See Figure 3 45 its vertical scale is in volts second its horizontal scale is in seconds The source signal is differentiated ov...

Страница 241: ...cale The settings that you make for offset scale and position affect the math waveform that you obtain Note the following tips for obtaining a good display H You should scale and position the source waveform so that it is contained on screen Off screen waveforms may be clipped resulting in errors in the derivative waveform H You can use vertical position and vertical offset to position your source...

Страница 242: ...s entire record length therefore the math waveform record length equals that of the source waveform Offset and Position When creating integrated math waveforms from live channel waveforms consider the following topics H You should scale and position the source waveform so that it is contained on screen Off screen waveforms may be clipped which will result in errors in the integral waveform H You c...

Страница 243: ...ences contain data measurement scalars are defined and so on See page page 3 29 for acquisition setup and page 3 63 for trigger setup Display the math control window 2 From the toolbar touch the Math button to display the Define Math control window Select a math waveform 3 Select the Math x tab for the math waveform that you want to define Be sure to touch Display to toggle it on so that the wavef...

Страница 244: ...s defined H Math definitions are not implemented if sources or other elements of the definition are not valid H Use the backspace button to remove the last entry use the clear key to remove the entire expression and start over H Use parentheses to group terms in the expression to control execution order for example 5 Ch1 Ch2 Select a function 6 Select the Time Freq Meas or Var tabs to display the ...

Страница 245: ... or touch Spect to open the Spectral control window Finished 13 Once you have defined the math expression to your satisfaction Touch the the apply button Then touch the OK button to dismiss the dialog box See To Use Math Waveforms on page 3 179 for more procedures For further assistance 14 Touch the Help button in the toolbar to access context sensitive help on math waveforms See Accessing Online ...

Страница 246: ...an also magnify all waveforms including math waveforms using zoom Basically you use the same techniques to work with math waveforms that work with channel waveforms Consider the Source Changes to source waveforms that you include as math ex pression operands are reflected in the math waveform However if Ch1 is 4 divisions high at 100 mV per division then at 50 mV per division Ch1 is 8 divisions hi...

Страница 247: ...aveform must be defined and displayed See the reference listed at right See To Define a Math Waveform on page 3 175 Select and display 2 Touch the Math button to display the Math control window 3 Touch any Math x tab to make that math waveform the selected waveform H If the waveform that you select is not defined use the To Define a Math Waveform procedure starting on page 3 175 to define the math...

Страница 248: ...he waveform handle and then using the multipurpose knobs to adjust the scale and position You cannot adjust the offset of a math waveform You cannot adjust horizontal scale position and sample density resolution of math waveforms different length source waveforms result in a math waveform of the shortest source record length If you adjust these settings for sources for a math waveform the adjustme...

Страница 249: ...her the H Bars V Bars Waveform or Screen buttons for more information see Taking Cursor Measurements starting on page 3 151 12 Turn the multipurpose knobs to position each cursor on the math waveform to measure the feature that interests you 13 Read the results in the cursor readout The cursor readout is displayed under the multipurpose readouts or in the upper right corner of the graticule area N...

Страница 250: ...ime Domain Controls The spectral analyzer has time domain controls for the acquired waveform These controls set the time duration and the resolution time between samples You can easily set the required sample rate and record length H Gating Controls These controls are the bridge that connect the time domain to the frequency domain You can perform spectral analysis on a gated region of the input wa...

Страница 251: ...ntrols Magnitude controls Phase controls Source Position Center dB dBm linear real imaginary degrees radians group delay Duration record length Duration Span Ref level Zero threshold Duration sample rate Window Resolution bandwidth Ref level offset Phase Unwrap Resolution Using the time controls The operation of the time domain controls for the spectral analyzer is summarized by the following rule...

Страница 252: ... Adjust Duration via sample rate Adjust Duration via record length Adjust Resolution Duration remains constant Figure 3 47 Duration and resolution control effects Using the gate controls Gating determines what portion of the acquired waveform is transformed into the frequency domain The gate has a position and a width control The gate position is the time in seconds from the trigger location to th...

Страница 253: ...the Frequency Domain controls The gated region of the source waveform is transformed by the spectral analyzer to a spectral waveform This may be a phase or magnitude waveform The horizontal units are always Hz The vertical units depend on whether phase or magnitude is selected The frequency domain controls for the spectral waveform are span center and resolution bandwidth The spectrum normally app...

Страница 254: ...Bandwidth RBW This is the 3 dB down bandwidth of the spectral analyzer frequency response to a sine wave input The resolution bandwidth is affected by two parameters H Different window functions produce different filter response shapes in the spectrum and result in different resolution bandwidths H The gate width of the input data affects the resolution bandwidth RBW Gate width has units of second...

Страница 255: ...th 200 Increase the center frequency Decrease the center frequency Set center frequency back to 1 and decrease the Span Decrease the Span again Increase resolution by reducing Resolution BW increasing the gate length Increase resolution again by reducing the Resolution BW doubling the gate length Start Stop Figure 3 49 Effects of frequency domain control adjustments ...

Страница 256: ...Level Offset to set what vertical position in the magnitude spectrum will be zero dB The following equation applies dB 20 logᏋ X Ref Ꮠ H If the input units are watts the the following equation applies dB 10 logᏋ X Ref Ꮠ Where X is a complex data point in the spectrum and Ref is the Reference Level Offset value H dBm This selects dB as described in the above equation but it also sets the Reference ...

Страница 257: ...g the Reference Level control setting Sometimes it is beneficial to adjust this control so that the peak of a fundamental is at zero dB Then you can measure other harmonics in terms of how many dB they are down from the fundamental Touch the dBm button to preset this level to the equivalent of 1 mW into 50 Ω 0 dB 20 dB 20 dB 20 dB Figure 3 51 Effects of adjusting the reference level offset control...

Страница 258: ...hase values from π to π radians or 180 to 180 degrees However when you perform impulse response testing and the phase is continuous then phase values outside these ranges may occur The spectral analyzer then wraps the data with disconti nuities in the display from 180 to 180 degrees Phase unwrap will display the correct result by unwrapping the phase Phase unwrap is only valid when the phase spect...

Страница 259: ...ion Group delay is the negative derivative of the phase with respect to frequency This feature is not useful for analysis of harmonic content of signals where the phase response is not continuous H Impulse Response Testing When performing impulse response testing of a system place the impulse at the zero phase reference position of the acquisition This produces a correct phase display Because the ...

Страница 260: ... In the time domain a window is a bell shaped function equal in length to the gate duration For most windows this function tapers to zero at both ends of the gate region Before computation of the spectral transform the window is multiplied sample by sample times the input data in the gate region The window function affects the shape of the spectral analyzer response in the frequency domain The win...

Страница 261: ...that is input to the spectral analyzer Also the gate width must be greater than or equal to the period of the start frequency of the span of the spectral analyzer that is there must be at least one cycle of the harmonic being measured within the gate region H Choice of a window Your choice of window function will depend on the input source characteristics which you want to observe and the characte...

Страница 262: ...l samples when the interpolation ratio due to FFT zero fill is one The bandwidth is measured between the points on the lobe that are 3 dB down from the peak of the lobe The bandwidth in Hz may be computed by dividing the BW in bins by the gate duration in seconds This is also referred to as resolution bandwidth RBW H Coherent gain The gain factor normally associated with different window functions...

Страница 263: ...e spectrum H Zero Phase Reference This is the position in the time domain gate that is the reference point for phase in the output spectrum That is if a sine wave input has its peak at the zero phase reference position then it reads out as zero phase in the spectrum If the phase is to be correct when doing impulse response testing the impulse in the time domain must be located at this position in ...

Страница 264: ...time domain shape of an exponential Gaussian function transforms into a Gaussian exponential shape in the frequency domain This window provides optimal localization in both the time and the frequency domain This is the filter shape most commonly used in spectrum analyzers 1 0 Amplitude Time 79 dB side lobe 0 80 dB Frequency bins Figure 3 55 Time and frequency graphs for the Gaussian window ...

Страница 265: ...is means the data samples in the gate are not modified before input to the spectral analyzer This window has the narrowest resolution bandwidth of any of the windows but it also has the most spectral leakage and the highest side lobes 1 0 Amplitude Time 13 dB side lobe 0 80 dB Frequency bins 40 Figure 3 56 Time and frequency domain graphs for the Rectangular window ...

Страница 266: ...ends see Figure 3 57 This makes it a good choice if you wanted to process the real and imaginary parts of the spectrum off line and inverse transform it back to the time domain Because the data does not taper to zero you could then remove the effect of the window function from the result 1 0 Amplitude Time 43 dB side lobe 0 80 dB Frequency bins 40 Figure 3 57 Time and frequency graphs of the Hammi...

Страница 267: ...sses see figures 3 58 3 59 and 3 60 Choose the one that best allows you to view the signal characteristics that you are interested in The Blackman Harris has a low amount of energy leakage compared to the other windows The Hanning has the narrowest resolution bandwidth but higher side lobes 1 0 Amplitude Time 32 dB side lobe 0 80 dB Frequency bins 40 Figure 3 58 Time and frequency graphs for the H...

Страница 268: ...d Using Math Waveforms 3 200 CSA7000B Series TDS7000B Series Instruments User Manual 1 0 Amplitude Time 67 dB side lobe 0 80 dB Frequency bins 40 Figure 3 59 Time and frequency graphs for the Kaiser Bessel window ...

Страница 269: ... 0 80 dB Frequency bins 40 Figure 3 60 Time and frequency graphs of the Blackman Harris window H Flattop2 Window This window has the lowest scallop loss of any of the windows see Figure 3 61 It also has a wider resolution bandwidth but lower side lobe attenuation Also it is unique because the time domain shape has negative values ...

Страница 270: ...SA7000B Series TDS7000B Series Instruments User Manual 1 0 Amplitude Time 90 dB side lobe 0 80 dB Frequency bins 40 120 0 dB 0 05 0 1 Scallop loss is 0 0065 dB Frequency bins Figure 3 61 Time and frequency domain graphs for the Flattop2 window ...

Страница 271: ...of the acquired data record length is used to capture the impulse response Exact details of how to compute its values were published in the article Impulse response testing lets a single test do the work of thousands by John Pickerd in EDN magazine April 27 1995 page 95 1 0 Amplitude Time 67 dB side lobe 0 80 dB Frequency bins 40 Figure 3 62 Tek Exponential window in the time and the frequency dom...

Страница 272: ...mple rate This is true regardless of the real time sample rate setting H Frequency Domain Averaging You may turn on average for a math waveform by editing the math expression Sometimes it is more desirable to average in the spectrum than in the time domain For example consider a signal that has time domain components that are asynchronous to the trigger If you turn on averaging in the time domain ...

Страница 273: ...cy sample rate Actual frequencies Figure 3 63 How aliased frequencies appear in a spectral waveform Another way to observe aliasing if you have a variable frequency signal source is to adjust the frequency slowly while watching the spectral display If some of the harmonics are aliased you will see the harmonics decreasing in frequency when they should be increasing or vice versa Using averaging in...

Страница 274: ... source must be acquiring or have acquired data This source does not have to be displayed to be used Overview To select a predefined spectral math waveform Related control elements and resources Prerequisites 1 All channel and reference Waveforms and automatic measurement scalars that you will use in your math waveform must be available channels and references contain data measurement scalars are ...

Страница 275: ...isition setup and page 3 63 for trigger setup Display the math control window 2 From the toolbar touch the Math button to display the Define Math control window Select spectral analysis setup 3 Touch Spectral Analysis Setup and then select the Create tab to display the Spectral Analysis Setup control window Select a spectral waveform 4 Touch Math x and select the math waveform that you want to cre...

Страница 276: ...000B Series TDS7000B Series Instruments User Manual Overview Related control elements and resources To define a spectral math waveform Cont Display the spectral waveform 8 To display your spectral waveform touch either the Apply or the OK button ...

Страница 277: ...t the scale and position by first touching the waveform handle and then using the multipurpose knobs to adjust the scale and position 11 To set the reference level touch Level and use the multipurpose knobs or keypad to set the reference level Note Reference level is the value at the top of the display screen It only applies to magnitude waveforms Adjusting the reference level positions the wavefo...

Страница 278: ...ay unwraps the phase spectrum and displays its negative derivative The topic Using the Phase Controls on page 3 190 provides in depth information on the setup for phase displays 15 To specify whether to unwrap phase in a spectral analysis phase waveform touch Unwrap to toggle it on or off 16 To set the level in dB that a magnitude in the spectrum must exceed to have its phase computed to reduce th...

Страница 279: ...ble FFT windows H Rectangular Best type of window for resolving frequencies that are very close to the same value Best type for measuring the frequency spectrum of nonrepetitive signals and measuring frequency components near DC H Hamming Hanning Blackman Harris Kaiser Bessel and Flattop2 These window are based on cosine series Each has a different RBW and spectral leakage characteristics Use the ...

Страница 280: ...hich the spectral analysis is performed touch Freq Span and use the multipurpose knobs or keypad to set the frequency range Higher sample rates allow you to set greater frequency spans To set the frequency span to the maximum allowed by the current sample rate touch the Full button 21 To set the center frequency of the spectral analysis touch Center Freq and use the multipurpose knobs or keypad to...

Страница 281: ...orm Note Resolution is the inverse of Sample rate Adjust resolution to adjust sample rate Resolution will also cause a change in record length such that the duration is kept constant at the value selected by the Duration control 24 To adjust the number of seconds over the duration of the acquired waveform record length touch Duration and use the multipurpose knobs or keypad to adjust the duration ...

Страница 282: ...e bottom of the graticule area The figure shows the cursor measurement of a frequency magnitude on an FFT The readout reads about 0 dB 4 0 mdB because it is aligned with the reference level offset The other readout reads 10 08 dB indicating the magnitude of the frequency it is measuring is 10 08 dB relative to reference level offset Display of the source waveform is turned off The cursor units wil...

Страница 283: ...ble on the front panel of the instrument Overview Spectral math example Control elements and resources Install the test hookup 1 Connect the probe compensation signal to CH 1 through a suitable cable and adapter 2 Press DEFAULT SETUP 3 Press AUTOSET Display the waveform 4 From the toolbar touch Vert and select the Chan 1 tab 5 Touch Offset and using the multipurpose knobs or keypad set the offset ...

Страница 284: ...tings touch the Spectral Analysis Setup button H Scale sets the vertical scale factor and lets you set the vertical scale H Reference sets the value at the top of the display and offset sets the waveform position with respect to its ground reference H Rec Length sets the number of samples in the waveform acquisition H Sample rate sets the sample rate H Duration sets the time over the acquired wave...

Страница 285: ...ctral analyzer The gate position is the time from the trigger to the zero phase reference position in the gate H Gate Duration sets the width of the gate in seconds and it is inversely proportional to the resolution bandwidth For narrow band frequency resolution use a wide gate H Gate Length displays the number of samples over the specified gate duration H Resolution BW sets the bandwidth in hertz...

Страница 286: ...ssign the cursors to the spectral analysis math waveform touch the Cursor Source Math tab and touch the Math 1 button 12 Use the multipurpose knobs or keypad to set the Curs1 Pos to 0 0 Hz and the Curs2 Pos to 125 kHz The cursor readout now indicates the frequency span set in step 9 13 Use the multipurpose knobs or keypad to set the Curs2 Pos to 62 5 kHz The cursor readout now indicates the center...

Страница 287: ...h harmonic of the probe compensation signal Read the frequencies from the cursor readouts 15 Touch the Cursor Type Waveform button Touch the Cursor 2 button and then the Math 1 button Now in addition to the frequency at the cursor locations the cursor readout displays the amplitude at the cursor locations The readout also displays the difference in frequency and amplitude between the cursor locati...

Страница 288: ...Creating and Using Math Waveforms 3 220 CSA7000B Series TDS7000B Series Instruments User Manual ...

Страница 289: ...trument for displaying and analyzing a certain signal H Save a series of setups to help automate a procedure through recall of a sequence of saved setups as part of performing the procedure H Export a setup for sharing with a second instrument The Save Setup and the Recall Setup control windows provide for including and viewing comments with your saved setups You can store information readable upo...

Страница 290: ... few things to remember when saving and recalling setups All Settings are Retained The instrument includes almost all instrument settings with a few exceptions such as user options in the saved setup Retaining Current Settings Recalling a setup replaces the current setup with the recalled setup If you do not want to lose your current setup save it to its own setup file for later recall before you ...

Страница 291: ...ext and so on If Count reaches 999 it is suggested that you change the base file name to Basefilename1 for example Risetime1 on the next save Your next file will then be saved as Risetime1000 ext Use the procedure that follows to save a setup to one of ten internal locations the instrument hard disk a floppy disk or third party storage device Overview To save your setup Control elements and resour...

Страница 292: ... Name your setup 5 Name your setup file by either H Accepting the name that appears in the name field H Double clicking in the name field and using the keyboard window to enter a new name replacing the default file name Note You can use the mouse or touch screen with the virtual keyboard to type entries in the name field H Clicking the existing name and using an attached keyboard to enter a new na...

Страница 293: ...ay a virtual keyboard You can use the mouse or touch screen with the virtual keyboard to type entries in the name fields and comments fields Select the Auto increment file name check box to save a series of files without typing in a new name each time For more information see Using Auto Increment File name on page 3 222 9 If not selected select set in the Save as type field as the type of file to ...

Страница 294: ... Display the setups control window 2 From the toolbar touch Setups and select the Recall Setups tab of the Setups control window Recall the setup 3 Touch the number of the setup that you want to recall The current instrument setup is overwritten Recall setup from a file 4 To display the Recall Instrument Setup dialog from the Recall Setup control window touch Recall The Recall Instrument Setup dia...

Страница 295: ...as indicated right to display a virtual keyboard You can use the mouse or touch screen with the virtual keyboard to type entries in the name fields and comments fields Access to virtual keyboard Recall your setup 8 Touch the Recall button to recall the setup file To cancel without recalling a setup touch the Cancel button For further assistance 9 For more help on recalling setups touch the Help bu...

Страница 296: ... math waveform The instru ment recalls each waveform into one of the reference waveform locations Ref1 Ref4 Use the procedure that follows to save a waveform or waveforms to a reference location the instrument hard disk CD RW disk a floppy disk or third party storage device Overview To save a waveform Control elements and resources Prerequisites 1 The instrument must be powered up 2 Make sure the ...

Страница 297: ...he vertical position of the waveform using the Label control window H Using the menu bar select Vertical and then Label H From the Label control window select the waveform that you want to label using the Source buttons H From the Label control window touch Label and use your keyboard or the pop up keyboard to create a label for your waveform H Position the label relative to the waveform using the...

Страница 298: ...saving to file and allows you to name the waveform file Select a destination 8 Use the Save in drop down list and buttons to navigate to the directory in which to save your waveform Select directory and name file 9 To specify the file name in which to save your waveform you can H Use the default name and directory appearing in the File Path field H Rename the file by typing a new name into the Fil...

Страница 299: ...nce waveforms do not recall because they are already reside in the instrument You can copy a reference waveform to another reference first display the reference to be copied and then use the Save Waveform procedure to save it to another reference Ref1 Ref4 Overview To recall your waveform Control elements and resources Prerequisites 1 The instrument must be powered up You must have access to a wav...

Страница 300: ...ry which contains a waveform that you want to recall Select your waveform 6 If not selected select wfm in the Files of type field to force the file listing to only include these types Use wfm for waveforms Note Only change the type if you want to temporarily see any other types of files in the current directory Otherwise leave it set to wfm 7 Choose your waveform file by either H Clicking an exist...

Страница 301: ... 263 to learn about using online help You can clear individual references of data or delete waveform files If you are sure you do not want the data a reference waveform contains use the procedures that follow to clear it To clear all references and setups use Tek Secure Overview To clear references Control elements and resources Prerequisites 1 The instrument must be powered up You must have acces...

Страница 302: ...own list and buttons to navigate to the directory of the file to delete Find your file 6 Select the file type in the Files of type drop down list to force the file listing to only include these types Use wfm for waveforms Note Only change the type if you want to temporarily see any other types of files in the current directory Otherwise leave it set to wfm for waveforms 7 Choose your waveform file...

Страница 303: ... export as a series of comma separated values CSV which are amplitudes without units There is no timing information but data is placed in the file in sequence from the first sample in the waveform record to the last Because the waveforms are exported as CSV without timing and scaling information the instrument does not import these waveforms directly If you intend to recall a waveform later save i...

Страница 304: ... header value holds time in seconds between samples H The third header value holds the trigger position expressed as an index in the data position H The fourth header value refers to the fractional trigger position Also note that the delimiters are carriage returns Use the procedure that follows to export a waveform or waveforms to the instrument hard disk a floppy disk or third party storage devi...

Страница 305: ... for Export The menu lists all available waveform image and measurement types available for export H Full Screen to export a bitmap of all screen contents H Graticule to export a bitmap of only the graticule area H Waveform to export waveform data H Measurements to export measurement data Select setup for export 4 From the menu bar select File and then select Export Setup to display the Export Set...

Страница 306: ...e color palette of your exported images 7 In the View window select whether you want to export the Full Screen or Graticules Only 8 In the Image window select whether you want to export using Normal or InkSaver with Enhanced Waveform Color Mode H Normal exports the image exactly as it appears on screen H InkSaver with Enhanced Waveform Color exports the image with colors designed to print with the...

Страница 307: ...ur exported waveform file see File Formats on page 3 235 for information on the available formats 12 Touch Source Waveform and select the source of the waveform a channel math or reference waveform to export from the list 13 If you want waveform scale factors and time values included in your MathCad Mathlab files touch Include waveform scale factors if not checked only voltage vertical values are ...

Страница 308: ...e data to include in the exported files H Save Samples between Cursors to include data between the cursors in the exported files H Save Samples in Zoom Area to include data in zoom area 1 2 3 or 4 in the exported files H All to include all data in the exported files 16 If using FastFrame select the frame range to include in the exported files H All Frames to include all frames in the exported file...

Страница 309: ... window 18 Touch Data Format and select the data format text or numeric from the list 19 Select the Measurements that you want to export H Displayed Measurements exports measurements that are displayed on screen H Measurements Snapshot exports a snapshot of all measurements H Histogram Data exports current histogram data 20 Touch OK to accept your changes Cancel to close the window without making ...

Страница 310: ... button will export your file Do the following to attach the PRINT button to Export H From the menu bar select File and then select Export Setup to display the Export Setup control window H Touch Set Print button to Export 22 The Export window lists all available waveforms allows for browsing to the destination directory naming the file and selecting the file format Select a destination 23 Use the...

Страница 311: ... field H Rename the file by typing a new name into the File name field H Select the Auto increment file name check box to save a series of files without typing in a new name each time For more information see Using Auto Increment File Name on page 3 222 Note If your instrument lacks a keyboard touch or click the keyboard icon buttons to display a virtual keyboard You can use the mouse or touch scr...

Страница 312: ... 3 228 Import the waveform data 3 In Excel select Open from the File menu Use the window that pops up to navigate to the directory containing the file Note If using MS Excel 2000 or 2002 skip the next step 4 In the dialog that displays make the selections as shown at the right as you navigate through the Text Import Wizard You must select delimiter as your data type comma as the delimiter type and...

Страница 313: ...n is selected Then select either of the following H Lines in the Standards Types tab H Smooth lines in the Custom Types tab Finish the chart 8 Click Next to step through the next two steps accepting the defaults setting at each step Click the Finish button in step 4 You should have a waveform display similar to that shown at the right Note This procedure assumes MS Excel 97 You can likely specify ...

Страница 314: ...copied exists that is your source must be a channel an active math waveform an active reference and so forth H See Powering On the Instrument on page 1 9 H See page 3 29 for acquisition setup H See page 3 63 for trigger setup Select for copy 2 From the menu bar select Edit and then select Select for Copy The menu lists all available waveform image and measurement types available for export H Full ...

Страница 315: ... display the Images control window 5 In the Palette window select Color or Black White for the color palette of your copied images 6 In the View window select whether you want to copy the Full Screen or Graticules Only 7 In the Image window select whether you want to copy using Normal or InkSaver Mode Setup to copy waveforms 8 Select the Waveforms tab to display the Waveforms control window ...

Страница 316: ...Include waveform scale factors 11 Touch Data Ordering and select the data order top first bottom first top first rotate 90 degrees or bottom first rotate 90 degrees from the list 12 In the Waveform data range window select the data to include in the exported files H Samples to enter the data range of the data to include in the exported files H Save Samples between Cursors to include data between t...

Страница 317: ...ow 15 Select Displayed Measurements to copy measurements that are displayed on screen select Measurements Snapshot to copy a snapshot of all measurements or select Histogram Data to copy histogram data in comma separated values format 16 Touch Data Format and select the data format text or numeric from the list Copy your file 17 Touch OK to accept your changes and copy the file to the clipboard Ca...

Страница 318: ...ows help and access its section on printers To print a waveform from the front panel push the front panel PRINT button The display screen will print on the default printer For additional print options see the topics that follow To print a waveform from the application menu bar select the File menu and then select Print The instrument displays the standard Microsoft Windows XP Print window shown in...

Страница 319: ...u want for your page Landscape format Portrait format Figure 3 66 Hardcopy formats H Palette select either Color or Black White H View select either Full Screen or Graticule s Only H Full Screen displays both the graticule and menu areas of the screen H Graticule s displays only the graticule area of the display H Image select either Normal or InkSaver with Enhanced Waveform Color Mode H Normal ex...

Страница 320: ...ure 3 67 Page setup window To preview your printout from the menu bar select the File menu and then select Print Preview The instrument displays the standard MS Windows XP Print Preview window shown in Figure 3 68 Access the Windows help system for more information To Preview the Page ...

Страница 321: ...a weather map The instrument uses a blank dark gray image that is electronical ly replaced by the graticule and the waveforms that are currently being displayed If you load the bitmap into a program such as Paint the graticule and waveforms are not part of the bitmap and although they are visible on Paint s window they will not be saved or printed To capture the instrument screen with its graticul...

Страница 322: ...ime 2 From the toolbar touch Disp and select the Objects tab 3 Touch Display Date Time to toggle it on To set the date and time 4 From the menu bar touch Utilities and select Set Time Date to display the Set Time and Date control window 5 Touch Hour Minute or Second and use the multipur pose knobs keypad or arrow buttons to enter the time 6 Touch Year Month or Day and use the multipurpose knobs ke...

Страница 323: ... locate the Product Software CD that was shipped with the instrument Install the CD in the personal computer that you want to use typically your instrument controller Follow the directions in the CD booklet You can install the guide in the instrument but that may not be convenient because it will cover the instrument screen For information on connecting the instrument to a network to enable printi...

Страница 324: ...Data Input Output 3 256 CSA7000B Series TDS7000B Series Instruments User Manual ...

Страница 325: ... This section contains procedures for creating MyScope control windows Detailed information is available in the online help Overview To create a new MyScope control window Control elements and resources Select from menu 1 Select MyScope New Control Window 2 Click to expand a category Controls that can be added to your MyScope control window are contained within each category The categories match t...

Страница 326: ...omized further 5 Clear the check boxes to remove any components that you do not want included in the control Create a control window 6 Click and drag the control to your MyScope control window The control will snap to the nearest grid location when you release the mouse You can change the placement of the control in your MyScope control window by clicking and dragging To reconfigure a control clic...

Страница 327: ...lick and drag a tab to a new location Set user preferences 10 Click User Pref to specify user preferences that are loaded with your MyScope control window Delete controls 11 To delete controls do one of the following H Select a tab and then click Delete The tab and all of the controls are deleted H Select a control and then click Delete Just the selected control is deleted H Click and drag the con...

Страница 328: ... them Use the following procedure to open an existing MyScope control window Overview To open a MyScope control window Control elements and resources Select from menu 1 Select MyScope Open Control Window or one of the five most recently used MyScope windows Select a control window 2 Select the MyScope control window that you want to use and then click Open To Open a MyScope Control Window ...

Страница 329: ...llowing procedure to edit a MyScope control window Overview To edit a MyScope control window Control elements and resources Select from menu 1 Select MyScope Edit Control Window Select a control window 2 Select the control window that you want to edit and then click Open Quick Tips H Some controls function differently in a MyScope control window than they do in the standard control window For deta...

Страница 330: ...MyScope 3 262 CSA7000B Series TDS7000B Series Instruments User Manual ...

Страница 331: ...perating information A few keys to remember when using online help follow H Use online help when you want to minimize interruption to your work flow Help Topics are there when you need more details about a feature H Use the manuals for instructions on putting the instrument into service for procedures on reinstalling its product software for listings of specifications and for overviews of features...

Страница 332: ...layed 3 Some windows have a help button as shown at the right Touch the button to open the help system with an overview of the dialog box that is currently displayed See right Click or touch here Touch an outlined control shown in the help window to receive more specific information about the control Touch a tab in a help window to navigate between the Overview and specific topics Touch the Minimi...

Страница 333: ...o dig deeper 4 You can search for help using the usual methods available for help on a PC From the menu bar select Help and then select Contents and Index 5 From the online help finder see below choose from the three tabs 6 Touch to explore the topic titles and to highlight one for display Touch the Display button to open the topic in a help window ...

Страница 334: ...in the Contents or Index tabs of the online finder you may want to enable full text search From the application menu bar select Help and then select Contents and Index 8 From the online help finder see below choose the Find tab 9 Choose the method for word list generation and select next or finish Once the word list generation finishes touching the Find tab will access a pane for searching with fu...

Страница 335: ...meet specifica tions the following conditions must be met H The instrument must have been calibrated in an ambient temperature between 20 C and 30 C 68 F and 86 F H The instrument must be operating within the environmental limits listed in Table A 12 on page A 27 H The instrument must be powered from a source that meets the specifications listed in Table A 10 on page A 25 H The instrument must hav...

Страница 336: ...ignals or intermittent signal irregularities Long Record Lengths Choose record lengths from 500 points up to 500 000 points per channel up 2 000 000 points on a single channel Extend the maximum record length up to a maximum of 64 000 000 points with memory options Peak Detect Acquisition Mode See pulses as narrow as 400 ps even at the slower time base settings Peak detect helps you see noise and ...

Страница 337: ...rum analyzer controls such as span and center frequency Color LCD Display Identify and differentiate waveforms easily with color coding Waveforms readouts and inputs are color matched to increase productivity and reduce operating errors Enhance visualization of waveforms with color grading Digital Phosphor The instrument can clearly display intensity modulation in your signals The instrument autom...

Страница 338: ...on Comm Triggers Optional on TDS7000B Series Use comm triggers to trigger on communication signals Serial Triggers Optional on TDS7000B Series Use serial triggers to trigger on serial pattern data Recovered Clock and Data Triggers Use recovered clock and data internally to trigger your waveforms They are also available externally CSA7000B Series only Autoset Use Autoset to quickly set up the verti...

Страница 339: ... for storage and retrieval of data The instrument has GPIB USB Centronics and Ethernet ports for input and output to other devices Online Help The instrument has a complete online help system that covers all features The help system is context sensitive help for the displayed control window is automatically shown if you touch the help button Graphical aids in the help windows assist you in getting...

Страница 340: ... temperatrues 45 C 6 0 VRMS for 100 mV settings for temperatrues 45 C Number of digitized bits 8 bits Sensitivity range Fine adjustment available with 1 resolution 2 mV div to 1 V division in a 1 2 5 sequence nDC gain accuracy Net offset is the nominal voltage that must be applied to the channel to bring the trace to center screen Net offset offset position volts division and is expressed in volts...

Страница 341: ...on Delta voltage measurement between any two averages of 16 waveforms acquired under the same setup and bi t diti 2 mV div to 3 98 mV div 2 5 6 net offset 1V reading 0 16 division V division setting ambient conditions 4 mV div to 99 5 mV div 2 2 net offset 1V reading 0 16 division V division setting 100 mV div to 1 V div 2 2 net offset 10V reading 0 16 division V division setting Net offset is the...

Страница 342: ...n level DL differential 2 DL integral independently based Nonlinearity typical 1 digitization level DL differential 2 DL integral independently based n Analog bandwidth DC 50 Ω coupling Full bandwidth TCA SMA or TCA N adapter operating ambient 15 C 0 C for TDS7154B and TDS7254B to 50 C 59 F to 122 F derated by 15 C 0 C for TDS7154B and TDS7254B to 50 C 59 F to 122 F derated by 30 MHz C below 15 C ...

Страница 343: ...0 mV div DC to 3 5 GHz Analog bandwidth with P7260 active probe or TCA BNC adapter typical TDS7704B Operating ambient 15 C to 30 C 59 F to 86 F at V div 10 mV div derated by 20 MHz C above 30 C 86 F TDS7704B SCALE range Bandwidth 2 mV div to 3 9 mV div DC to 1 GHz 4 mV div to 9 9 mV div DC to 1 25 GHz 10 mV div DC to 6 GHz Calculated rise time typical1 TDS7704B 62 ps CSA7404B TDS7404B 100 ps TDS72...

Страница 344: ... nominal voltage that must be applied to the channel to bring the trace to center screen Net offset offset position volts division Offset accuracy is the accuracy of this voltage level CSA7404B TDS7404B TDS7254B TDS7154B SCALE range Offset accuracy TDS7154B 2 mV div to 9 95 mV div 0 2 net offset 1 5 mV 0 1 div V div setting 10 mV div to 99 5 mV div 0 35 net offset 1 5 mV 0 1 div V div setting 100 ...

Страница 345: ...nly 4 9 bits 5 GHz TDS7704B only 4 5 bits 6 GHz TDS7704B only 3 5 bits 7 GHz TDS7704B only 3 0 bits n Delay between channels 30 ps between any two channels with the same scale and coupling settings n Channel to channel crosstalk 15 1 at rated bandwidth CSA7404B TDS7704B TDS7404B TDS7254B only and 80 1 at 1 5 GHz or the rated bandwidth whichever is less Assumes two channels with the same scale sett...

Страница 346: ...r of active channels and the record length options installed Maximum record length is less in serial trigger mode Standard 500 000 points 3 or 4 channels 1 000 000 points 1 or 2 channels only 1 000 000 points 1 or 2 channels only 2 000 000 points 1 channel only Option 2M installed 2 000 000 points 3 or 4 channels 4 000 000 points 1 or 2 channels only 8 000 000 points 1 channel only Option 3M insta...

Страница 347: ...k Detect acquisition mode depending on memory option installed depending on memory option installed Frame length Maximum number of frames 50 points Standard 648 5872 Option 2M 2660 24088 Option 3M 5321 48192 Option 4M 5321 48192 Option 5M 10644 96408 500 points Standard 580 3560 Option 2M 2381 14632 Option 3M 4765 29272 Option 4M 4765 29272 Option 5M 9531 58552 5000 points Standard 163 720 Option ...

Страница 348: ...cal Short term 2 ps rms records having duration 100 ms 800 fs rms records having duration 10 s Long term 15 parts per trillion rms records having duration 1 minute Time base delay time range 5 ns to 250 s n Delta time measurement accuracy For a single channel with signal amplitude 5 divisions reference level set at 50 interpolation set to sin x x with risetime 1 4 Ts and 4 Ts or 150 ps whichever i...

Страница 349: ...iv at 2 5 GHz TDS7154B 1 div at 1 5 GHz Delayed trigger DC coupled 0 5 div from DC to 50 MHz CSA7404B TDS7704B TDS7404B 1 5 div at 3 GHz TDS7254B 1 div at 2 5 GHz TDS7154B 1 div at 1 5 GHz Auxiliary input DC coupled 150 mV from DC to 50 MHz increas ing to 500 mV at 2 5 GHz typical between 2 and 2 5 GHz Edge Trigger Sensitivity either slope DC l d t i l All sources for vertical scale settings 10 mV...

Страница 350: ...nuates signals 20 kHz LF REJ Same as DC coupled limits for frequen cies 200 kHz attenuates signals 200 kHz Auxiliary trigger input characteristics typical 50 Ω 10 5 V DC peak AC Lowest frequency for Set Level to 50 typical 50 Hz Advanced trigger sensitivity typical For vertical scale settings 10 mV div and 1 V div Advanced triggers 1 0 div from DC to 1 GHz at the TekConnect connector Advanced trig...

Страница 351: ...er ranges Limits Glitch type 340 ps to 1 s Runt type time qualified 340 ps to 1 s Width type 340 ps to 10 s Timeout type 340 ps to 1 s Transition type 340 ps to 1 s Pattern type 340 ps to 1 s Window type 340 ps to 1 s Setup Hold type Setup and Hold timers Limits Setup time time from data transition to clock edge 100 ns to 100 ns Hold time time from clock edge to data transition 1 ns to 102 ns Setu...

Страница 352: ...Trigger Source Accuracy Any channel 2 setting net offset 0 35 div volts div setting offset accuracy 10 mV div only Auxiliary Not specified where net offset offset position volts division B Event Delayed trigger Trigger After Time Trigger on nth Event Range Delay time 5 ns to 250 s Event count 1 to 107 Minimum pulse width typical 250 ps Minimum time between events typical 1 ns Trigger position erro...

Страница 353: ...ut along with regenerated data CSA7000B Series only Clock recovery jitter typical 0 25 bit period 2 ps rms for PRBS data patterns 0 25 bit period 1 2 ps rms for repeating 01 data patterns Clock recovery tracking acquisition range typical 2 of requested baud Minimum signal amplitude needed for clock recovery typical 1 division p p up to 1 25 GBd 1 5 divisions p p above 1 25 GBd Table A 6 Display sp...

Страница 354: ... connector supports the following modes standard output only bidirectional PS 2 compatible bidirectional enhanced parallel port IEEE 1284 standard mode 1 or mode 2 v 1 7 bidirectional high speed extended capabilities port ECP Serial port DB 9 COM1 port uses NS16C550 compatible UARTS transfer speeds up to 115 2 kb s Keyboard port PS 2 compatible instrument must be powered down to make connection Mo...

Страница 355: ...50 Ω load Vol 500 mV Voh 0 V typical 1 kHz 5 1 V from base to top 20 into a 1 ΜΩ load Vol 1 0 V Voh 0 V typical n Analog Signal Output amplitude BNC connector provides a buffered version of the signal that is attached to the channel 3 input when channel 3 is the trigger source 20 mV div 20 into a 1 MΩ load 20 mV div 20 into a 1 MΩ load 10 mV div 20 into a 50 Ω load Offset between 100 mV and 170 mV...

Страница 356: ...to 50 Ω load 0 7 V with 4 ma sink 0 25 V into 50 Ω load Serial data output baud rate range CSA7000B Series only Fbaud 1250 MBd Output swing of 1010 repeating pattern at this baud will be at least 200 mV into 50 Ω Serial clock output frequency range CSA7000B Series only Peak to peak output swing at 625 MHz is at least 200 mV p p into 50 Ω Higher frequencies are further attenuated by approximately 6...

Страница 357: ...e same setup and ambient conditions 2 2 net offset 1 mW reading 0 16 div W div Excludes normal variations due to fiber connection to the front of the instrument nOptical Channel Bandwidth includes O E O E to TekConnect adaptor and instrument 5 _C to 25 _C 2 4 GHz DC conversion gain linearity 4 mV div 4 5 6 net offset 4 mV div to 99 5 mV div 4 2 net offset 100 mV div to 1 0 V div 4 2 net offset 10 ...

Страница 358: ...to CH1 input adapter and instrument Maximum falling edge 10 to 2 settling time ORR disabled typical The step response to a fast optical square OFF edge reaches toc within 2 of the final 0 level within 2 ns after the 10 transition point Smallest average power for mask test sensitivity typical 1310 nm and 1550 nm 40 W peak to peak 20 W 17 dBm average power assuming 50 average duty cycle 780 nm and 8...

Страница 359: ...Characteristic Description Power consumption 600 Watts 900 VA Source voltage and frequency 100 to 240 V 10 50 Hz to 60 Hz 115 V 10 400 Hz CAT II Fuse rating Either one of the following sizes can be used each size requires a different fuse cap Both fuses must be the same type Line and Neutral are fused 0 25 in 1 25 in size UL198G and CSA C22 2 No 59 fast acting 8 A 250 V Tektronix part number 159 0...

Страница 360: ...m 10 9 in height 330 mm 13 in with feet extended 455 mm 17 9 in width 426 mm 16 75 in depth Rackmount configuration Option 1R With rack handles Without rack handles 267 mm 10 5 in height 502 mm 19 75 in width 486 mm 19 13 in depth 267 mm 10 5 in height 482 mm 19 in width 435 mm 17 13 in depth Cooling Fan forced air circulation with no air filter Required clearances Top 0 mm 0 in Bottom 19 mm 0 75 ...

Страница 361: ...re of 29 C 84 F at or below 50 C 122 F noncondensing Upper limit derates to 25 relative humidity at 50 C 122 F Nonoperating With no diskette in floppy disk drive 20 to 90 relative humidity with a maximum wet bulb temperature of 29 C 84 F at or below 60 C 140 F noncondensing Upper limit derates to 20 relative humidity at 60 C 140 F Altitude operating 3 048 m 10 000 ft Nonoperating 12 190 m 40 000 f...

Страница 362: ...00 4 11 AC Mains Voltage Dips and Interruption Immunity 100 reduction for one cycle EN 61000 3 2 Power Harmonic Current Emissions EN 61000 3 3 Voltage Changes Fluctuations and Flicker 1 If interconnect cables are used they must be low EMI shielded cables such as the following Tektronix part numbers or their equivalents 012 0991 00 012 0991 01 012 0991 02 or 012 0991 03 GPIB Cable 012 1213 00 or CA...

Страница 363: ...ations The installation categories are CAT III Distribution level mains usually permanently connected Equipment at this level is typically in a fixed industrial location CAT II Local level mains wall sockets Equipment at this level includes appliances portable tools and similar products Equipment is usually cord connected CAT I Secondary signal level or battery operated circuits of electronic equi...

Страница 364: ...Appendix A Specifications A 30 CSA7000B Series TDS7000B Series Instruments User Manual ...

Страница 365: ...er the entire waveform or gated region Cycle Mean Voltage measurement The arithmetic mean over the first cycle in the waveform or the first cycle in the gated region Cycle RMS Voltage measurement The true Root Mean Square voltage over the first cycle in the waveform or the first cycle in the gated region Delay Timing measurement The time between the MidRef crossings of two different traces or the ...

Страница 366: ...ming measurement of the first cycle in the waveform or gated region The ratio of the negative pulse width to the signal period expressed as a percentage NegativeDutyCycle NegativeWidth Period 100 Negative Overshoot Voltage measurement Measured over the entire waveform or gated region NegativeOvershoot Low Min Amplitude 100 Negative Width Timing measurement of the first pulse in the waveform or gat...

Страница 367: ...an and half are greater than this value StdDev The standard deviation Root Mean Square RMS deviation of all acquired points within or on the histogram box Hits in Box Displays the number of points in the histogram box or on the box boundary Waveform Count Displays the number of waveforms that have contributed to the histogram Peak Hits Displays the number of points in the largest bin of the histog...

Страница 368: ...th The eye width in seconds y y Eye Width TCross2mean 3 TCross2sigma TCross1mean 3 TCross1sigma Crossing The eye crossing point as a percentage of eye height Crossing 100 PCross1mean PBasemean PTopmean PBasemean Eye Top The top of the eye Eye Base The base of the eye Jitter Pk Pk The peak to peak value for the edge jitter in the current horizontal units p p g j Jitter PP TCross1PP Jitter RMS The R...

Страница 369: ...s a percent of the eye period percent of the eye period DCD 100 x TDCDp p TCross2mean TCross1mean Quality Factor Ratio of eye size to noise y y Quality Factor PTopmean PBasemean PTopsigma PBasesigma Levels Used in Taking Amplitude Timing and Area Measurements Refer to Figure B 1 and the descriptions that follow to interpret the definitions of waveforms in categories Amplitude Timing and Area Low r...

Страница 370: ... in such measurements as Period and Duty Cycle Typically set to 50 You can choose how this level is set see Reference Levels Method on page 3 143 LowRef The waveform low reference level Used in fall and rise time calcula tions Typically set to 10 You can choose how this level is set see Reference Levels Method on page 3 143 Mid2Ref The middle reference level for a second waveform or the second mid...

Страница 371: ...areas are used with a specified sample size to statisti cally measure the following values H PTopmean the mean value of PTop H PTopsigma the standard deviation of PTop H PToppk pk The vertical peak to peak deviation of PTop H PBasemean the mean value of PBase within the Eye Aperture1 H PBasesigma the standard deviation of PBase within the Eye Aperture1 H PBasepk pk the vertical peak to peak deviat...

Страница 372: ...f the left crossing point at PCross1 The T2 values are vertical and horizontal values associated with the rightmost crossing point These areas are used to establish the following directions H TCross2mean the horizontal mean of the right crossing point at TCross2 H TCross2sigma the horizontal standard deviation of the right crossing point at TCross2 H TCross2p p the horizontal peak to peak deviatio...

Страница 373: ...me of the Max Min 1 horizontal bar indicating the Min value 1 vertical arrow indicating the time of the Min Pk Pk 2 horizontal bars indicating the Max and Min 2 vertical arrows indicating the time of the Max and Min Cycle RMS 3 horizontal bars indicating the High the Low and the RMS value 2 horizontal arrows facing each other at the mid ref indicating the cycle time Overshoot 3 horizontal bars ind...

Страница 374: ...l bars indicating the high and low Pos Width 2 horizontal arrows facing each other at the mid ref indicating the start and end time In detailed mode there are 2 horizontal bars indicating the high and low Neg Width 2 horizontal arrows facing each other at the mid ref indicating the start and end time In detailed mode there are 2 horizontal bars indicating the high and low Period 2 horizontal arrow...

Страница 375: ...an bin Max 1 vertical or horizontal bar indicating the max bin Min 1 vertical or horizontal bar indicating the min bin Pk Pk 2 vertical or horizontal bars indicating the min and max bins Mean 1 vertical or horizontal bar indicating the mean bin Std Dev 3 vertical or horizontal bars indicating the mean and mean 1 standard deviation U 1 3 vertical or horizontal bars indicating the mean and mean 1 st...

Страница 376: ...cal bars indicating the crossing times Crossing In Detailed mode 4 horizontal arrows and 2 horizontal bars indicating the eye window left right top and base 1 horizontal arrow indicating the crossing position In standard mode 1 horizontal arrow indicating the crossing position Eye Top 2 horizontal arrows and 1 horizontal bar indicating the eye window left the eye window right and the eye top Eye B...

Страница 377: ...orizontal bars indicating the eye window left right top and base S N Ratio 1 box indicating the histogram boundaries In detailed mode 4 horizontal arrows and 2 horizontal bars indicating the eye window left right top and base Cyc Distortion 2 horizontal arrows indicating the time of the rise time of the fall and the reference level In detailed mode 4 horizontal arrows and 2 horizontal bars indicat...

Страница 378: ...Appendix B Automatic Measurements Supported B 14 CSA7000B Series TDS7000B Series Instruments User Manual ...

Страница 379: ...ays the Reference Setup window that you use to set up and control reference waveforms Displays the Waveform Display control window that you can use to turn the display of waveforms on and off Displays the control window that you use to position the waveform and set the vertical scale Displays a control window that you use to label your waveforms Displays the Reference Setup window that you use to ...

Страница 380: ...or Graticules Only Image Normal or InkSaver Mode or Data Format used when exporting images Waveforms Select the Data Destination channel Source data range Waveform Detail and Data Ordering used when exporting waveforms Measurements Select the Data Format and type of Measurements used when exporting measurements Select for Export Full Screen bitmap Graticule bitmap Waveform data Measurements data S...

Страница 381: ...een bitmap Graticule bitmap Waveform data Measurement data Select from the list what you want to copy to the clipboard Copy Setup Displays the Copy Setup window that you use to set up and copy images waveforms and measurements Images Select the Palette Color GrayScale or Black White View Full Screen or Graticules Only Image Normal or InkSaver Mode or Data Format used when copying images Waveforms ...

Страница 382: ...ale Label Displays a control window that you use to label your waveforms Vertical labels move if the waveform position changes also see display screen text on page C 9 Offset Displays the Vertical Offset control window you use to set the vertical offset and scale of a waveform Termination Displays the Termination control window you use to select input termination for a channel Coupling Displays th...

Страница 383: ...ands Menu Submenu Function Horizontal Acquisition Setup Displays the Horizontal and Acquisition Setup window you use to set up the Horizontal and Vertical subsystems Horizontal You can set the record length scale resolution sample rate duration delay reference point and zoom Acquisition You can set the acquisition mode enable fast acquisitions roll mode equivalent time interpolated real time equiv...

Страница 384: ...instrument automatically uses equivalent time sampling when the sample rate is too fast to acquire enough samples using real time sampling Position Scale Displays the Horizontal control window that you use to turn on and off delay mode position the waveform and set the horizontal scale Resolution Displays the Resolution control window that you use to set the record length and view the duration sam...

Страница 385: ... split mode to 100 Displays the Zoom Display Area control window that you use to set the zoom graticule size Trigger Commands Table C 5 lists the commands available from the Trig menu on the menu bar Table C 5 Trig menu commands Menu Submenu Function A Event Main Trigger Setup Displays the Trigger Setup window you use to set up the A Event triggers Quick Select Edge Glitch Width Runt Window Timeou...

Страница 386: ...up Logic State Setup Comm Setup optional on TDS7000B Series Serial Pattern Setup optional on TDS7000B Series A B Trigger Sequence B Event Delayed Trig ger Setup Holdoff Displays the trigger Holdoff control window you use to set trigger holdoff Mode Displays the Trigger Mode control window you can use to select the trigger mode force a trigger and set the trigger level to 50 Run Stop Displays the R...

Страница 387: ...e trigger level marker and date and time display Colors Displays the Colors tab of the Display Setup window select the color of screen objects Display Style Dots Vectors Intensified Samples Choose Dots to display each waveform as a series of dots Choose Vectors to display vectors or lines between the dots Chose Intensified Samples to display actual samples as bright dots interpolated dots are blac...

Страница 388: ...des of green Choose Gray to display fast acquisition and waveform database waveforms in shades of gray Choose Temp temperature to display fast acquisition and waveform database waveforms with the highest sample density points appearing in warmer colors reds Choose Spectral to display fast acquisition and waveform database waveforms with the highest sample density points appearing in blue shades Ch...

Страница 389: ...Cursor Position control window that you use to position the cursors Cursor Setup Displays the Cursor Setup control window that you use to set up and control cursors Measure Commands Table C 8 lists the commands available from the Measure menu Table C 8 Measure menu commands Menu Submenu Function Measurement Setup Displays the Math Setup control window you use to display measurements setup measurem...

Страница 390: ...ak to Peak Mean Standard Deviation Mean 1 StdDev Mean 2 StdDev Mean 3 StdDev Displays the selected measurement of the histogram Statistics Reset Statistics Off Mean All Statistics Controls Resets measurement statistics Displays the selected measurement statistics of current measurements Displays the Statistics Controls window Reference Levels Displays the Reference Levels setup window you use to s...

Страница 391: ...ndow that you use to select the source of mask Tolerance Setup Displays the Tolerance Setup tab of the Mask Setup window that you use to set up the mask margin tolerance Pass Fail Setup Displays the Pass Fail Setup tab of the Mask Setup window that you use to set up pass fail testing Pass Fail Results Displays the Pass Fail Results tab of the Mask Setup window that you use to view test results Mas...

Страница 392: ... Setup Displays the Spectral Math Setup control window that you use to create spectral math waveforms Magnitude Spectrum Creates a predefined magnitude spectral math waveform Phase Spectrum Creates a predefined phase spectral math waveform Spectral Controls Displays the Spectral Math controls window that you can use to control your spectral math waveform Set Math Averages Displays the Math Averagi...

Страница 393: ...ys a window that you use to run instrument diagnostics and view the diagnostic status and error log If errors are displayed refer the instrument to qualified service personnel1 Multipurpose Knobs Deassign Multipurpose Knobs Momentary Readouts Always Show Readouts Never Show Readouts Readout Setup Deassigns the multipurpose knobs from their current function Set the multipurpose knob readouts to dis...

Страница 394: ...ts and Index Displays the contents and index dialog of the online help Restore Help If the help window is minimized help is redisplayed Specifications Displays the instrument specifications Technical Support Displays how to obtain technical support Customer Feedback Displays how to supply customer feedback About TekScope Displays the instrument version number serial number instrument id copyright ...

Страница 395: ...ft bristle brush If any dirt remains use a cloth or swab dipped in a 75 isopropyl alcohol solution Use a swab to clean narrow spaces around controls and connectors Do not use abrasive compounds on any part of the chassis Clean the On Standby switch using a dampened cleaning towel Do not spray or wet the switch directly CAUTION Do not use chemical cleaning agents which might damage the plastics use...

Страница 396: ...s cleaners to clean the display Do not spray liquids directly on the display surface Do not scrub the display with excessive force Clean the flat panel display surface by gently rubbing the display with a clean room wipe such as Wypall Medium Duty Wipes 05701 available from Kimberly Clark Corporation If the display is very dirty moisten the wipe with distilled water or a 75 isopropyl alcohol solut...

Страница 397: ...d by the record length Except in equivalent time the instrument acquires one data point for every acquisition interval Aliasing A false representation of a signal due to insufficient sampling of high frequencies or fast transitions A condition that occurs when an instrument digitizes at an effective sampling rate that is too slow to reproduce the input signal The waveform displayed on the instrume...

Страница 398: ...ified time period Autoset A function of the instrument that automatically produces a stable waveform of usable size Autoset sets up front panel controls based on the characteristics of the active waveform A successful autoset will set the volts div time div and trigger level to produce a coherent and stable waveform display Average acquisition mode In this mode the instrument acquires and displays...

Страница 399: ...ted controls for a major instrument function that the instrument displays at the right of the screen Coupling The association of two or more circuits or systems in such a way that power or information can be transferred from one to the other You can couple the input signal to the trigger and vertical systems several different ways Cursors Paired markers that you can use to make measurements betwee...

Страница 400: ...he power out Pi is the power in and log is the decimal based logarithmic function See Optical Bandwidth on page 3 60 dBm A logarithmic measure of power referenced to 1 milliwatt 1 mW optical power 0 0 dBm dBm 10 log Ꮛoptical power 1 mW Ꮠ DC coupling A mode that passes both AC and DC signal components to the circuit Available for both the trigger system and the vertical system Delay measurement A m...

Страница 401: ... normal display rate using variable or infinite persistence This display mode emulates the display of an analog instrument Edge Trigger Triggering occurs when the instrument detects the source passing through a specified voltage level in a specified direction the trigger slope Envelope acquisition mode A mode in which the instrument acquires and displays a waveform that shows the variation extreme...

Страница 402: ... You define the area of interest using the vertical cursors Glitch positive trigger Triggering occurs if the instrument detects positive spike widths less than the specified glitch time Glitch negative trigger Triggering occurs if the instrument detects negative spike widths less than the specified glitch time Glitch either trigger Triggering occurs if the instrument detects either positive or neg...

Страница 403: ...m method With the min max method most useful for general waveforms it is the maximum value found With the histogram method most useful for pulses it refers to the most common value found above the mid point Holdoff trigger The time after a trigger signal that elapses before the trigger circuit will accept another trigger signal Trigger holdoff helps ensure a stable display Horizontal acquisition w...

Страница 404: ... Sin x x computes record points in a curve fit between the actual values acquired It assumes all the interpolated points fall in their appropriate point in time on that curve Intensity Display brightness Interleaving A method by which instruments attain higher digitizing speeds The instrument applies the digitizing resources of unused channels that is channels that are turned off to sample those t...

Страница 405: ...d using either the min max or the histogram method With the min max method most useful for general waveforms it is the minimum value found With the histogram method most useful for pulses it refers to the most common value found below the mid point Maximum Amplitude voltage measurement of the maximum amplitude Typically the most positive peak voltage Mean Amplitude voltage measurement of the arith...

Страница 406: ...f oscillation in a laser A laser can operate in one mode single mode or in many modes multimode Multimode Cable A thick cored optical fiber compared to single mode cable that can propagate light of multiple modes Multipurpose knobs Front panel knobs you can use to change the value of the assigned parameter NAND A logic Boolean function in which the output of the AND function is complemented true b...

Страница 407: ...ction Optical to Electrical converter A device that converts an optical signal to an electrical signal OR A logic Boolean function in which the output is true if any of the inputs are true Otherwise the output is false On the instrument a trigger logic pattern and state function Peak Detect acquisition mode A mode in which the instrument saves the minimum and maximum samples over two adjacent acqu...

Страница 408: ...The instrument display is 640 pixels wide by 480 pixels high Positive duty cycle A timing measurement of the ratio of the positive pulse width to the signal period expressed as a percentage Positive overshoot Amplitude voltage measurement PositiveOvershoot Max High Amplitude 100 Positive width A timing measurement of the distance time between two amplitude points rising edge MidRef default 50 and ...

Страница 409: ... such as a voltage to a digital value Real time sampling A sampling mode where the instrument samples fast enough to completely fill a waveform record from a single trigger event Use real time sampling to capture single shot or transient events Record length The specified number of samples in a waveform Recovered Clock A clock signal derived from and synchronous with a received data sequence Refer...

Страница 410: ...tion Sample interval The time interval between successive samples in a time base For real time digitizers the sample interval is the reciprocal of the sample rate For equivalent time digitizers the time interval between successive samples represents equivalent time not real time Sampling The process of capturing an analog input such as a voltage at a discrete point in time and holding it constant ...

Страница 411: ...e is propagated Slew Rate trigger A mode in which the instrument triggers based on how fast a pulse edge traverses slews between an upper and lower threshold The edge of the pulse may be positive negative or either The instrument can trigger on slew rates faster or slower than a user specified rate Slope The direction at a point on a waveform You can calculate the direction by computing the sign o...

Страница 412: ...ion of what the trace displays It can include one or more channels combined arithmetically and modified by functions Trigger An event that marks time zero in the waveform record It results in acquisi tion and display of the waveform Trigger level The vertical level the trigger signal must cross to generate a trigger on edge trigger mode Vertical acquisition window The vertical range of the segment...

Страница 413: ... has been acquired Waveform interval The time interval between record points as displayed XY format A display format that compares the voltage level of two waveform records point by point It is useful for studying phase relationships between two waveforms XYZ format A display format that compares the voltage level of two waveform records point by point as in XY format The displayed waveform intens...

Страница 414: ...Glossary Glossary 18 CSA7000B Series TDS7000B Series Instruments User Manual ...

Страница 415: ...egative 3 83 3 85 3 87 3 89 NOR 3 96 3 98 3 103 OR 3 96 3 98 3 103 pattern 3 96 polarity and width 3 83 3 85 3 87 positive 3 83 3 85 3 87 3 89 pulse 3 83 3 85 3 87 3 89 3 94 rising edge 3 98 3 100 runt 3 85 3 102 set thresholds 3 96 3 98 3 103 set to ECL 3 90 set to TTL 3 90 setup hold 3 99 3 102 slew rate 3 89 source 3 83 3 85 3 87 3 89 3 92 3 94 state 3 98 thresholds 3 86 3 90 timeout 3 94 3 102...

Страница 416: ...l mode 3 33 to start acquiring 3 32 to start and stop acquisition 3 32 to stop acquiring 3 32 to take a single acquisition 3 32 to turn off roll mode acquisitions 3 33 trigger point 3 36 untriggered roll 3 28 untriggered roll with single sequence 3 28 using 3 24 using fast acquisition mode 3 40 using FastFrame 3 48 waveform database 3 26 3 30 waveform record 3 36 Acquisition mode C 6 spectral math...

Страница 417: ... Glossary 8 Glossary 13 configuration 3 35 readout 3 130 reference indicator Glossary 3 trigger input 3 64 3 70 Channel probe deskew 3 162 Glossary 3 Channels deskew 3 162 digitizer configuration 3 34 shared horizontal window 3 23 shared parameters illustrated 3 23 Circuit loading Glossary 3 Cleaning exterior D 1 flat panel display D 2 optical connectors 3 57 Clear all references and setups 3 233 ...

Страница 418: ...y 3 Cycle RMS B 1 C 11 Glossary 3 D DATA 3 56 Data controlling input and output 3 221 Data Clear 3 133 Data input output 3 221 all settings are retained 3 222 avoiding setup waveform mismatches 3 222 begin your chart 3 245 bitmap file format 3 235 copy your file 3 249 copying waveforms 3 235 delete a reference waveform file 3 234 delete the file 3 235 delete the reference 3 233 display the referen...

Страница 419: ...e to a file 3 224 to save your setup 3 223 to save your waveform 3 228 to set the date and time 3 254 to set up the page 3 251 to use an exported waveform 3 244 using auto increment filename 3 222 view 3 251 Data Source A Trigger control window 3 100 Date and time display 3 133 C 10 displaying 3 254 on hardcopies 3 254 setting 3 133 3 254 dB 3 209 Glossary 4 dBm Glossary 4 DC coupling Glossary 4 D...

Страница 420: ...le 3 137 change waveforms colors 3 137 checking the zoom scale and position 3 130 color palette 3 132 customizable display elements 3 132 customize graticule waveforms 3 137 customizing the display 3 131 date and time 3 133 defining and displaying waveforms 3 121 display and acquisition controls 3 123 display control 3 120 display elements 3 120 display format 3 133 display persistence 3 132 displ...

Страница 421: ...zoom position 3 130 zoom reset 3 130 3 131 zoom scale 3 130 Dots 3 132 3 134 3 135 C 9 display control window 3 134 DPO Glossary 5 Dragging Glossary 5 Dual display setup 1 17 Dual graticule Glossary 5 Duration 3 183 Duty cycle Glossary 10 Glossary 12 distortion B 5 E ECL 3 84 3 90 3 95 3 100 A Trigger level 3 75 3 76 Edge setup C 8 trigger 3 65 C 7 Glossary 5 Edit menu copy C 3 copy setup C 3 full...

Страница 422: ...ength 3 50 setup C 6 time stamping frames 3 52 to lock the reference position frames 3 54 to set FastFrame mode 3 50 turn readouts on or off time stamps 3 52 using FastFrame acquisitions 3 49 view multiple frames 3 51 FastFrame mode using 3 50 FastFrame setup horizontal menu 3 50 3 54 FFT math waveform automated measurements of 3 205 phase suppression 3 210 procedure for displaying 3 207 procedure...

Страница 423: ...g deeper 3 265 to enable full text search 3 266 Help menu C 16 about TekScope C 16 contents and index C 16 customer feedback C 16 help on window C 16 restore help C 16 specifications C 16 technical support C 16 Hi Res 3 25 acquisition mode Glossary 7 incompatible with fast acquisitions 3 41 High B 1 Glossary 7 High level C 11 High low method 3 142 Histogram 3 148 limit controls 3 160 mean 3 148 me...

Страница 424: ...edure 1 21 option C 15 software installation 1 13 1 15 Instrument diagnostics C 15 id C 16 setup C 1 Integral math waveform 3 174 applications 3 174 derivation of 3 174 record length of 3 174 Integration waveform 3 173 Inten samp 3 135 Intensified samples 3 135 C 9 Intensity 3 46 Glossary 8 display menu 3 46 Waveform 3 133 Interleaving 3 40 Glossary 8 Internal reference 2 10 C 15 Interpolated real...

Страница 425: ...eforms 3 182 See also Spectral Math derivative See Derivative math waveform derivative math waveform illustration 3 172 differentiation 3 171 disallowed in DPO 3 41 display the math control window 3 175 expression syntax 3 171 FastFrame 3 169 functional transformation of an acquired waveform illustration 3 168 how to create 3 169 how to manage displaying 3 178 incompatible with fast acquisitions 3...

Страница 426: ...atistics C 12 rise time C 12 RMS C 11 s n ratio C 12 snapshot C 11 standard deviation C 12 statistics C 12 statistics controls C 12 time C 12 value count C 12 value mean C 12 Vert C 12 waveform histograms C 12 Measurement C 3 Glossary 9 amplitude B 1 Glossary 1 annotation 3 146 area B 1 Glossary 2 burst width B 1 Glossary 2 crossing B 4 cycle area B 1 Glossary 3 cycle mean B 1 Glossary 3 cycle RMS...

Страница 427: ...53 customize measurements 3 141 display measurement statistics 3 146 display the calibration instructions 3 161 display the cursor controls window 3 155 enable position the gates 3 150 FastFrame 3 142 gates 3 141 gating 3 150 graticule cursor and automatic measurements 3 140 high low method 3 142 histogram 3 142 3 148 histogram counting 3 158 histogram counting stays on 3 158 histogram mean 3 143 ...

Страница 428: ...138 See also Zoom feature 3 125 MyScope using 3 260 MyScope control window 3 257 N NAND Glossary 10 NAND A Trigger control window 3 96 3 98 3 103 Neg duty cycle C 12 Neg overshoot C 11 Negative duty cycle B 2 Negative overshoot B 2 Negative width B 2 C 12 Negative A Trigger control window 3 83 3 85 3 87 3 89 Net offset A 6 A 7 Network connection 1 16 No persistence C 9 Noise pk pk C 12 pk pk measu...

Страница 429: ...sttrigger 3 64 Glossary 12 Powering off 1 10 Powering on 1 9 Preferences C 15 Pretrigger 3 64 Glossary 12 Principal power switch Glossary 12 Print C 2 Print preview 3 253 C 2 Printing 3 250 waveforms 3 250 Probe accessories 1 36 cal C 4 calibrate 3 162 calibration fixture 3 162 compensation Glossary 13 definition Glossary 13 low frequency compensation 3 163 Probe channel deskew 3 162 Glossary 3 Pr...

Страница 430: ...ggered 3 28 untriggered with single sequence 3 28 using 3 33 Run application C 14 RUN STOP 3 30 3 49 Run stop C 6 C 8 Run Stop button only 3 27 Runt setup C 8 Runt trigger 3 78 C 7 Glossary 14 A Trigger control window 3 85 how to set up 3 85 3 118 how to setup 3 102 S S N ratio B 5 C 12 Sample 3 24 3 30 Sample acquisition mode Glossary 14 Sample interval 3 21 Glossary 14 defined 3 36 Sample rate m...

Страница 431: ...allation 1 13 1 15 Source A Trigger control window 3 83 3 85 3 87 3 89 3 94 Sources 3 141 3 142 Span 3 185 Specifications A 1 help menu C 16 Spectral analysis displaying phase 3 210 Spectral analyzer controls 3 212 Spectral averaging 3 182 Spectral controls C 14 Spectral grading C 10 Spectral Math reference level 3 188 Spectral math 3 dB BW in bins 3 194 acquisition mode 3 204 affects of frequency...

Страница 432: ...y domains illustration 3 203 time and frequency domain graphs for the Flattop2 window illustration 3 202 time and frequency domain graphs for the Rectangu lar window illustration 3 197 time and frequency graphs for the Gaussian Window illustration 3 196 time and frequency graphs for the Hanning window illustration 3 199 time and frequency graphs for the Kaiser Bessel window illustration 3 200 time...

Страница 433: ... 110 Trigger 3 64 Glossary 16 A Only 3 109 AC line voltage 3 64 3 70 auxiliary 3 64 3 70 coupling 3 67 delay 3 68 edge 3 65 Glossary 5 glitch 3 78 3 83 3 102 Glossary 6 holdoff 3 66 independent level 3 69 level 3 67 3 69 Glossary 16 level marker 3 133 line 3 64 3 70 logic 3 77 3 80 marker 3 133 mode 3 65 overview 3 63 pattern 3 79 3 96 position 3 67 pulse 3 77 readout 3 72 runt 3 78 3 85 3 102 Glo...

Страница 434: ... width triggering 3 87 sequential trigger reset 3 109 sequential triggering 3 103 serial pattern triggering 3 65 3 117 set the data and clock levels 3 100 set the level 3 84 3 88 3 95 set the setup and hold times 3 101 set the thresholds 3 86 set the timer 3 94 set the transition time 3 90 set thresholds 3 98 set to trigger if width 3 84 set to trigger when 3 85 3 88 3 91 3 94 set trigger when 3 9...

Страница 435: ...ls 3 24 Using the waveform display 3 119 Utilities menu AUX Out configuration C 15 external signals C 15 GPIB configuration C 15 instrument calibration C 15 instrument diagnostics C 15 multipurpose knobs C 15 option installation C 15 reference selection C 15 set time and date C 15 Tek Secure C 15 user preferences C 15 V Value count C 12 Value mean C 12 Variable persistence 3 135 3 136 C 9 display ...

Страница 436: ...ary 12 setup C 8 trigger C 7 Width trigger 3 78 3 87 A Trigger control window 3 87 how to set up 3 87 3 118 how to setup 3 102 main trigger menu 3 83 3 85 Window 3 192 Blackman Harris 3 211 characteristics 3 192 3 194 Flattop2 3 211 functions 3 182 Gaussian 3 211 Hamming 3 211 Hanning 3 211 Kaiser Bessel 3 211 rectangular 3 211 rectangular vs bell shaped 3 197 selecting 3 193 setup C 8 Tek Exponen...

Страница 437: ...Index CSA7000B Series TDS7000B Series Instruments User Manual Index 23 setup 3 122 C 5 C 6 Size C 5 ...

Страница 438: ...Index Index 24 CSA7000B Series TDS7000B Series Instruments User Manual ...

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