TDS3AAM Advanced Analysis Application Module User Manual
Contents
1. access the XY cursor menu items The following figure shows XY cursors in Waveform mode with polar readouts 3 23 1 48 125 117 444n 84 0n 21 XY Cursor Menu Bottom Side Description Function Off Turns XY cursors off Waveform Turns waveform or graticule cursor modes on Use the front panel SELECT button to select which Graticule cursor to move the active cursor Use the general purpose knob to move the active cursor Mode Independent Sets cursors to move independently Tracking Sets cursors to move together when the reference cursor is selected Readout Rectangular Displays values at and between the cursor positions as X and Y read outs Polar Displays values at and between the cursor positions as radius and angle readouts Product Displays product values of the active cursor and the difference vector of the two cursors Ratio Displays ratio values of the active cursor and the difference vector of the two cursors 22 0 0 Origin The XY waveform origin is the 0 volt point of each source waveform Positioning both source wave form 0 volt points on the vertical center graticule places the origin in the center of the screen All actual measurements are referenced to the XY waveform s 0 0 origin and show the value of the active cursor Waveform Mode The Waveform mode uses cursors to measure the actual waveform data to determine X and Y values and2. active measurement readout nis the number of measurement values used to calculate the mean and standard deviation values and ranges from 2 to 1000 Use the general purpose knob to change the value in increments of 1 fine or 10 coarse The default value is 32 Waveform Polarity For area calculation the waveform area above ground is positive the waveform area below ground is negative Waveform Clipping For best results make sure that all input waveforms do not extend beyond the top or bottom graticules of the display referred to as clipping the waveform Using clipped waveforms with measure ment or math functions can result in incorrect values Area The following equation shows the algorithm for calculating the waveform area for the entire record or gated region If Start End then return the interpolated value at Start Otherwise End Area Waveform t dt Start Cycle Area The following equation shows the algorithm for calculating the waveform area for a single cycle in the record or gated region If StartCycle EndCycle then return the interpolated value at StartCycle Otherwise EndCycle CycleArea Waveform t dt StartCycle 10 Min Max Min Max displays a minimum and maximum measurement readout directly below each active mea surement The following is an example of a Min Max readout Ch1 Freq 15 98 MHz Min 15 81MHz Max 16 17MHz Mean Standard Deviation Mean Standard Devi
3. user defined unit labels These labels replace the unknown readout value 14 Advanced Math Menu cont Bottom Description Advanced Display Displays the current advanced Math cont Expression math expression on the grati cule Edit Expression Screen The Edit Expression screen lets you create arbitrary math expressions Refer to page 16 for a description of the Edit Expression controls Expression Expression Expression cursor field list l y Chi Ch2 Ch3 Ch4 Refl Ref2 Ref3 Ref4 Y FFT Intg Diff Period Freq Delay Rise Fall BurstWidth Phase PosDutyCcycle NegDutycycle Poswidth Negwidth PosOverShoot NegOverShoot PeakPeak Amplitude High Low Maxi Min Mean CycleMean Rms CycleRms Area CycleArea VARI VAR2 A xe 12340867890 15 Edit Expression Screen Menu item Description Expression Location in expression field where the next cursor expression element is entered Expression Area that displays the entered expression field elements up to a maximum of 127 characters Expression list The list of available elements Use the general purpose knob to select an element You can only select elements that are syntactically correct for the current math expression Non selectable elements are grayed out Refer to page 17 for more expression element information Edit Expression Controls The Edit Expression screen provides controls and menu items to cr
4. waveform intensity as well as how long the waveform data persists on the screen 12 Acquisition Modes Changes to the acquisition mode globally affect all input channel sources except for DPO math thereby modifying any math waveforms using them For example with the acquisition mode set to Envelope a Ch1 Ch2 math waveform will receive enveloped channel 1 and channel 2 data which results in an enveloped math waveform Clearing Data Clearing the data in a waveform source causes a null waveform to be delivered to any math waveform that includes that source until the source receives new data 13 Advanced Math Functions The TDS3AAM application module lets you create a custom math waveform expression that can incorporate active and reference waveforms measurements and or numeric constants To access the Advanced Math menu push the MATH front panel button and then push the Advanced Math bottom button Advanced Math Menu Bottom Side Advanced Edit Math Expression Description Displays a screen in which you can create or edit the expres sion that defines the math waveform See page 15 VAR1 VAR2 n nnnn Enn Assigns numeric values to two variables You can use these variables as part of an expres sion Push the side menu button to select between the base n nnn and the exponent nn field Use the general purpose knob to enter values Define Units Displays a screen in which you can enter
5. waveform origin to the active selected cursor At The time from the reference cursor to the delta Waveform cursor A negative value means that the delta Mode cursor is earlier in the waveform record than the reference cursor t The time from the trigger point to the active cursor Waveform A negative value means that the active cursor is Mode earlier in the waveform record than the trigger point The following is an example of Polar readouts in Wave form mode Ar 2 90V r 1 27V A0 32 6 6 179 At 4 20us t 8 36us 26 The following figure shows an example of how the oscilloscope calculates the difference vector from the radius and angle values of the two cursors The following figure shows how the oscilloscope determines polar angle values XY origin or reference cursor for A measurements 180 180 27 Product Readouts The Product readouts displays the following information AXx AY The product of the difference vector s X component multiplied by the difference vector s Y component XX Y The product of the active cursor s X value multiplied by the active cursor s Y value At The time from the reference cursor to the delta Waveform cursor A negative value means that the delta Mode cursor is earlier in the waveform record than the reference cursor t The time from the trigger point to the active cursor Waveform A negative value means that the a
6. Edit Math Units Controls Control Description General pur Selects highlights a character in the label list pose knob Up Arrow Selects the Vertical or Horizontal label in the Down Arrow unit label field OK Accept Closes the Edit Math Units screen and button displays the math menu Enter Charac Adds the selected character at the cursor ter button position in the unit field Left Arrow Moves the unit label field cursor to the left or Right Arrow right 19 Edit Math Units Controls cont Control Back Space button Description Erases the character to the left of the cursor position Delete button Deletes the character at the cursor position in the unit label field Clear button Clears erases all characters in the current unit field Horizontal or Vertical MENU OFF Closes the Edit Math Units screen and returns button to the previous menu without applying the user defined units Math Expression Example The following expression calculates the energy in a waveform where Ch1 is in volts and Ch2 is in amps Intg Ch1xCh2 Taking an Area measurement on the resulting waveform displays the waveform power value 20 XY Cursors The TDS3AAM application module adds XY and XYZ waveform measurement cursors These cursor functions are part of the Cursor menu You must display an XY waveform DISPLAY gt XY Display gt Triggered XY or Gated XYZ in order to
7. User Manual TDS3AAM Advanced Analysis Application Module 071 0946 01 INTO AAA T 071094601 Copyright Tektronix All rights reserved Licensed software products are owned by Tektronix or its subsidiaries or suppliers and are protected by national copyright laws and international treaty provisions 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 TEK TEKPROBE and TekSecure are registered trademarks of Tektronix Inc DPX WaveAlert and e Scope are trademarks of Tektronix Inc Contacting Tektronix Tektronix Inc 14200 SW Karl Braun Drive P O Box 500 Beaverton OR 97077 USA For product information sales service and technical support In North America call 1 800 833 9200 m Worldwide visit www tektronix com to find contacts in your area Contents Safety Summary 0 0 0 cece eee neces 2 TDS3AAM Overview 00c cece eee en eens 5 Installing the TDS3AAM Application Module 6 Accessing Advanced Analysis Menus 6 Measurement Functions 22 00000 8 DPO Math Functions 000ceseeeeeaee 12 Advanced Math Functions 2 05 14 XY CUTSOTS oiin kaen aa aa iaaa Bee cael ee ia 21 Safety Summary To avoid potential hazards use this product only as specified While us
8. ation displays a mean u and standard deviation 0 readout directly below each active measurement The mean and standard deviation values are running calculations which means that the current calculation incorporates the results of previous calculations The following is an example of a Mean Standard Deviation readout Chl Freq 15 98 MHz u 15 99MHz o 82 92kHz Screen Readouts The Min Max and Mean Standard Deviation readouts display directly below the waveform measurements in an area normally used for measure ment qualifier text such as Low resolution If you suspect the measurement turn off statistics to see if the oscilloscope displays any qualifier text 11 DPO Math Functions The TDS3AAM application module adds the ability to perform dual waveform math on DPO waveforms The resulting DPO math waveform contains intensity or gray scale information that like an analog oscilloscope increases waveform intensity where the signal trace occurs most often This gives you more information about signal behavior To access the DPO math menu push the MATH front panel button and then push the DPO Math bottom button DPO Math Menu Bottom Side Description DPO Math Set 1st Source Selects the first source wave to form Set Operator Selects the math operator to 0r X Set 2nd Selects the second source Source to waveform Intensity Use the WAVEFORM INTENSITY front panel knob to control the overall
9. ctive cursor is Mode earlier in the waveform record than the trigger point The following is an example of Product readouts in Waveform mode AXX AY 7 16VV X x Y 1 72VV At 4 68us t 8 84us 28 Ratio Readouts The Ratio readouts displays the follow ing information AX AY The ratio of the difference vector s Y component divided by the difference vector s X component X Y The ratio of the active cursor s Y value divided by the active cursor s X value At The time from the reference cursor to the delta Waveform cursor A negative value means that the delta Mode cursor is earlier in the waveform record than the reference cursor t The time from the trigger point to the active cursor Waveform A negative value means that the active cursor is Mode earlier in the waveform record than the trigger point The following is an example of Ratio readouts in Wave form mode AY AX 1 22VV Y X 1 10VV At 4 68ms t 8 84ms 29
10. eate math expres sions The following table describes the Edit Expression controls Edit Expression Controls Control Description General pur Selects highlights an element in the expres pose knob sion list Enter Selec Adds the selected element to the expression tion button field You can also use the front panel SELECT button 16 Edit Expression Controls cont Control Description Back Space Erases the last entered element from the button expression field Clear button Clears erases the entire expression field OK Accept Closes the Edit Expression screen and button displays the math expression waveform MENU OFF Closes the Edit Expression screen and returns button to the previous menu without changing the math expression Expression List The following gives more information on the expression list items Expression List Menu item Description Ch1 Ch4 Specifies a waveform data source Ref1 Ref4 FFT Intg Executes a Fast Fourier Transform integra Diff tion or differentiation operation on the expression that follows The FFT operator must be the first left most operator in an expression All these operations must end with a right parenthesis 17 Expression List cont Menu item Period CycleArea Description Executes the selected measurement operation on the waveform active or reference that follows All these operations must end with a rig
11. ht parenthesis Var1 Var2 Adds the user defined variable to the expres sion Ty 9X Executes an addition subtraction multiplica tion or division operation on the following expression and are also unary use to negate the expression that follows Parentheses provide a way to control evaluation order in an expression The comma is used to separate the from and to waveforms in Delay and Phase measurement operations 1 0 E Specifies a numeric value in optional scientific notation User Defined Variables This feature lets you define two variables such as math constants that you can then use as part of a math expression The side menu button toggles between selecting the numeric field and selecting the scientific notation field E Use the general purpose knob to enter values in either field Push the COARSE front panel button to quickly enter larger numbers in the numeric field 18 Edit Math Units Controls The Edit Math Units screen provides controls and menu items to create custom units for math waveforms Whenever the oscilloscope cannot determine the horizontal or vertical units for a measure ment it displays the undefined unit character The user defined units function replaces the undefined horizontal or vertical unit character with the user defined vertical or horizontal unit for math waveforms only The following table describes the Edit Math Units controls
12. ication module DPO Math Arbitrary math expressions Allow you to create waveforms using math operations on active and reference waveforms waveform measurements up to 2 user definable variables and arithmetic expressions Waveform area and cycle area measurements Measurement statistics Adds min max or mean standard deviation readouts to displayed measurements XY waveform cursors Installing the TDS3AAM Application Module Refer to the TDS3000 TDS3000B and TDS3000C Series Application Module Installation manual for instructions on installing and testing the application module Accessing Advanced Analysis Menus The TDS3AAM Advanced Analysis module adds Area Cycle Area and statistical measurement functions to the Measure menu and DPO math and Advanced Math functions to the Math menu and XY cursors to the Cursor menu To access the Advanced Analysis func tions use the following table Accessing TDS3AAM Functions Push Push front bottom panel menu Push side menu Function button button button Area MEASURE Select More button until Cycle Area Measrmnt you display Area and measurement Cycle Area buttons See page 8 Measurement MEASURE Statistics To select Min Max or Statistics Mean Standard Devi ation See page 9 Accessing TDS3AAM Functions cont Push Push front bottom panel menu Push side menu Function button button button DPO Math MATH DPO Math To select waveform s
13. ing this product you may need to access other parts of the system Read the General Safety Summary in other system manuals for warnings and cautions related to operating the system Preventing Electrostatic Damage CAUTION Electrostatic discharge ESD can damage components in the oscilloscope and its accessories To prevent ESD observe these precautions when directed to do so Use a Ground Strap Wear a grounded antistatic wrist strap to discharge the static voltage from your body while installing or removing sensitive components Use a Safe Work Area Do not use any devices capable of generating or holding a static charge in the work area where you install or remove sensitive components Avoid handling sensitive components in areas that have a floor or benchtop surface capable of generating a static charge Handle Components Carefully Do not slide sensitive components over any surface Do not touch exposed connector pins Handle sensitive components as little as possible Transport and Store Carefully Transport and store sensitive components in a static protected bag or container Manual Storage The oscilloscope front cover has a convenient place to store this manual SS aoe LZ TDS3AAM Overview This section provides an overview of the TDS3AAM Advanced Analysis application module features and describes how to access the advanced analysis functions You can do the following analysis tasks with the TDS3AAM appl
14. ources and operator See page 12 Math MATH Advanced To create a math ex waveform Math pression define a expressions variable value define units and display the math expression See page 14 XY Cursors CURSOR Function To select Waveform XY cursor you must be in XY display mode to see this menu See page 21 Measurement Functions The TDS3AAM application module adds Area and Cycle Area measurements to the Select Measurement side menu list and adds a Statistics bottom button to the Measurement menu To access these measurement menu items push the MEASURE front panel button Area and Cycle Area Measurements Bottom Side Description Select Area Voltage over time measurement Measurmnt The arithmetic area over the entire waveform or gated region mea sured in vertical unit seconds for example volt seconds or amp se conds Cycle Area Voltage over time measurement The arithmetic area over the first cycle in the waveform or the first cycle in the gated region mea sured in vertical unit seconds for example volt seconds or amp se conds Area and Cycle Area Measurements cont Bottom Side Statistics OFF Description Disables displaying statistical information with active measure ments Min Max Displays minimum and maximum readouts for each active measure ment readout Mean Standard Deviation n Displays Mean and Standard Deviation readouts for each
15. rsor positions of the Waveform cursors in the waveform record Waveform Sources You can use XY cursors on active acquisitions single sequence acquisitions and reference waveforms You must store both XY source waveforms in order to recreate an XY waveform The X axis wave form must be stored in Ref1 24 Rectangular Readouts The Rectangular readouts display the following information The X and Y difference from the reference cursor to AX AY j the delta cursor A negative X value means that the delta cursor is to the left of the reference cursor on the X axis A negative Y value means that the delta cursor is below the reference cursor on the Y axis X Y The actual X and Y values of the active selected cursor At The time from the reference cursor to the delta Waveform cursor A negative value means that the delta Mode cursor is earlier in the waveform record than the reference cursor t The time from the trigger point to the active cursor Waveform A negative value means that the active cursor is Mode earlier in the waveform record than the trigger point The following is an example of Rectangular readouts in Waveform mode AX 1 43V AY 2 14V At 660ns X 140mV Y 480mV t 1 61us 25 Polar Readouts The Polar readout displays the following information Ar A The radius and angle from the reference cursor to the delta cursor r 0 The radius and angle from the XY
16. units While in Waveform mode the XY cursors always lock onto the XY waveform and cannot be positioned off the XY waveform Graticule Mode The Graticule function does not connect screen cursor position to waveform data Instead the display is like a piece of graph paper where the values of the divisions are set by each channel s vertical scale The graticule cursor readouts display the XY value of the screen not the waveform data Because graticule cursors are not associated with waveform data the cursors are not locked to the XY waveform and can be positioned anywhere on the graticule All readout types Polar Rectangular Product and Ratio are available in both Waveform and Graticule cursor modes However no time readouts are displayed in Graticule mode because the cursors are not measuring the waveform record 23 Turning XY Cursors Off To turn off the XY cursors push the front panel CURSOR button and then push the Cursor Function Off side menu button Reference and Delta Cursors Both Waveform and Grati cule modes use two XY cursors a reference cursor H and a delta cursor All difference A measurements are measured from the reference cursor to the delta cursor Switching Between XY and YT Display You can switch between XY and YT display mode to see the location of the Waveform cursors in the YT waveform The wave form record icon at the top of the graticule also shows the relative cu
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