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Tektronix 071-0130-00 User Manual Download Page 178

Triggering on Waveforms

TDS 500D, TDS 600B, & TDS 700D User Manual

3–117

Level lets you enter the trigger level using the general purpose knob or the
keypad.

Set to TTL fixes the trigger level at +1.4 V.

Set to ECL fixes the trigger level at –1.3 V.

Set to 50% fixes the trigger level to approximately 50% of the peak-to-peak
value of the trigger source signal. When AMI is selected, this selection measures
the peak-to-peak level and sets the upper threshold to 75% and the lower
threshold to 25%. If you select a DS0 mask the trigger level is set correctly, do
not press the front panel button SET LEVEL TO 50%.

Delayed Triggering

The TDS Oscilloscope provides a main time base and a delayed time base. The
delayed time base, like the main time base, requires a trigger signal and an input
source dedicated to that signal. You can only use delay with respect to the main
edge trigger and certain classes of main pulse triggers. This section describes
how to delay the acquisition of waveforms.

There are two different ways to delay the acquisition of waveforms: delayed runs
after main and delayed triggerable. Only delayed triggerable uses the delayed
trigger system. Delayed runs after main looks for a main trigger, then waits a
user-defined time, and then starts acquiring. (See Figure 3–54.)

Wait User-specified

Time

Acquire 

Data

Wait for

Main

Trigger

Figure 3–54: Delayed Runs After Main

Delayed triggerable looks for a main trigger and then, depending on the type of
delayed trigger selected, makes one of the three types of delayed triggerable mode
acquisitions: After Time, After Events, or After Events/Time. Study Figure 3–55 to
understand the sequence the oscilloscope goes through for each delayed mode.

Summary of Contents for 071-0130-00

Page 1: ...User Manual TDS 500D TDS 600B TDS 700D Digitizing Oscilloscopes 071 0130 00 This document applies for firmware version 1 0 and above ...

Page 2: ...lause at DFARS 252 227 7013 or subparagraphs c 1 and 2 of the Commercial Computer Software Restricted Rights clause at FAR 52 227 19 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 Printed in the U S A Tektronix Inc P O ...

Page 3: ...o any other locations 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 representatives to install repair or service the product b to repair damage resulting from improp...

Page 4: ......

Page 5: ...le 2 Displaying Multiple Waveforms 2 17 Example 3 Taking Automated Measurements 2 22 Example 4 Saving Setups 2 28 Reference Overview 3 1 Acquiring and Displaying Waveforms 3 5 Coupling Waveforms to the Oscilloscope 3 5 Setting up Automatically Autoset and Reset 3 9 Selecting Channels 3 12 Scaling and Positioning Waveforms 3 15 Choosing an Acquisition Mode 3 27 Customizing the Display 3 40 Customiz...

Page 6: ...ps 3 165 Saving and Recalling Waveforms and Acquisitions 3 168 Managing the File System 3 175 Printing a Hardcopy 3 180 Communicating with Remote Instruments 3 191 Determining Status and Accessing Help 3 197 Displaying Status 3 197 Displaying the Banner 3 199 Displaying Help 3 199 Using Features for Advanced Applications 3 201 Limit Testing 3 201 Waveform Math 3 206 Fast Fourier Transforms 3 209 W...

Page 7: ... 2 13 The Menus After Changing Channels 2 21 Figure 2 14 Measure Main Menu and Select Measurement Side Menu 2 23 Figure 2 15 Four Simultaneous Measurement Readouts 2 24 Figure 2 16 General Purpose Knob Indicators 2 26 Figure 2 17 Snapshot of Channel 1 2 28 Figure 2 18 Save Recall Setup Menu 2 30 Figure 3 1 How Probe Compensation Affects Signals 3 6 Figure 3 2 P6139A Probe Adjustment 3 7 Figure 3 3...

Page 8: ...3 62 Figure 3 31 DPO XY Display 3 65 Figure 3 32 Fast Frame 3 67 Figure 3 33 Horizontal Menu FastFrame Setup 3 68 Figure 3 34 Horizontal Menu FastFrame Snapshot 3 70 Figure 3 35 FastFrame TimeStamp 3 71 Figure 3 36 Triggered Versus Untriggered Displays 3 74 Figure 3 37 Trigger Holdoff Time Ensures Valid Triggering 3 77 Figure 3 38 Slope and Level Controls Help Define the Trigger 3 78 Figure 3 39 T...

Page 9: ... Modes 3 140 Figure 3 67 H Bars Cursor Menu and Readouts 3 141 Figure 3 68 Paired Cursor Menu and Readouts 3 142 Figure 3 69 Histogram Menu and Vertical Histogram 3 145 Figure 3 70 Mask menu 3 149 Figure 3 71 Creating a User Mask 3 154 Figure 3 72 Performing a Signal Path Compensation 3 157 Figure 3 73 Probe Cal Menu and Gain Compensation Display 3 160 Figure 3 74 Re use Probe Calibration Data Men...

Page 10: ...re 3 100 Waveform Record vs FFT Time Domain Record 3 217 Figure 3 101 FFT Time Domain Record vs FFT Frequency Domain Record 3 218 Figure 3 102 How Aliased Frequencies Appear in an FFT 3 222 Figure 3 103 Windowing the FFT Time Domain Record 3 225 Figure 3 104 FFT Windows and Bandpass Characteristics 3 228 Figure 3 105 Derivative Math Waveform 3 230 Figure 3 106 Peak Peak Amplitude Measurement of a ...

Page 11: ... Table 3 5 XY Format pairs 3 46 Table 3 6 DPO XY Format pairs 3 65 Table 3 7 Pattern and State Logic 3 88 Table 3 8 Pulse trigger definitions 3 100 Table 3 9 Comm triggers 3 113 Table 3 10 Communications pulse forms 3 116 Table 3 11 Measurement definitions 3 126 Table 3 12 Measurement definitions 3 147 Table 3 13 Standard masks 3 155 Table 3 14 Probe cal status 3 164 Table A 1 Options A 1 Table A ...

Page 12: ...Table of Contents viii TDS 500D TDS 600B TDS 700D User Manual ...

Page 13: ...ns 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 marking on the product Consult the product manual for further ratings information before making connections to the product The common terminal is at ground potential Do not connect the common terminal to elevated voltages...

Page 14: ... 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 Protective Ground Earth Terminal CAUTION Refer to Manual Double Insulated WARNING High Voltage Acquisition circuitry in the TDS 794D is very susceptible to damage from electrostatic discharge and fro...

Page 15: ...ing and other useful information Related Manuals The following documents are related to the use or service of the oscilloscope The TDS Family Digitizing Oscilloscopes Programmer Manual a diskette that is included with the user manual describes using a computer to control the oscilloscope through the GPIB interface The TDS 500D TDS 600B TDS 700D Reference gives you a quick overview of how to operat...

Page 16: ...documents the TDS 500D TDS 600B TDS 700D Digitizing Oscilloscopes Take note of the following conventions used when referencing these oscilloscopes The name TDS 500D is used when providing information common to the TDS 520D TDS 540D and TDS 580D model oscilloscopes The name TDS 600B is used when providing information common to the TDS 620B TDS 644B TDS 680B and TDS 684B model oscilloscopes The name...

Page 17: ...menus Also whether a name is a main menu or side menu item is clearly indicated Press VERTICAL MENU Coupling main DC side Bandwidth main 250 MHz side Using the convention just described results in instructions that are graphically intuitive and simplifies procedures For example the instruction just given replaces these five steps 1 Press the front panel button VERTICAL MENU 2 Press the main menu b...

Page 18: ...Preface xiv TDS 500D TDS 600B TDS 700D User Manual ...

Page 19: ...Getting Started ...

Page 20: ...e model see Table 1 1 on page 1 3 Records lengths up to 8 M depending on the model and options see Table 1 1 on page 1 3 Up to 29 automatic measurements and measurement statistics see Taking Automated Measurements on page 3 126 1 DC vertical gain accuracy see TDS 500D TDS600B TDS 700D Technical Reference manual DPO for high speed acquisition and analog oscilloscope emulation see Using DPO Acquisit...

Page 21: ...eskew for increased measurement accuracy see Channel Probe Deskew on page 3 158 Full GPIB programmability see Communicating with Remote Instruments on page 3 191 and the TDS Family Programmer Manual disk Wide array of probing solutions see Accessory Probes on page A 6 and Probe Selection on page D 1 CE FCC UL and CAN CSE compliant see TDS 500D TDS600B TDS 700D Technical Reference manual Four chann...

Page 22: ... DSP Math3 Opt 2F Std 4 Communication Signal Analyzer Opt 2C No Opt 2C Reference Receiver Opt 3C and 4C No Opt 3C and 4C No Storage Floppy Disk Std I 0 includes RS 232 and Centronics5 Opt 13 Std 4 iomega Zip Drive sup port Yes No Yes Input Impedance 50 and 1 M 50 only Display Mono Color Mono Color 1 Two plus Two channel operation allows two of four channels to be displayed simultaneously Channels ...

Page 23: ...User Manual Product Specification The product specification is found in the technical reference TDS 500D TDS 600B TDS 700D Technical Reference Performance Verification and Specifications that is shipped as a standard accessory with the TDS Oscillo scope ...

Page 24: ... the higher bandwidth of these oscilloscopes order the P6245 P6217 or P6158 probes The remaining TDS 500D TDS 600B and TDS 700D oscilloscopes ship with general purpose probes The probe model and quantities shipped are listed in Standard Accessories on page A 4 For a list of recommended optional accessory probes for all oscilloscope models see Accessory Probes on page A 5 Be sure you use the approp...

Page 25: ...iate operating environment Specifications for temperature relative humidity altitude vibrations and emissions are included in the TDS 500D TDS 600B TDS 700D Technical Reference Performance Verification and Specifications manual Tektronix part number 071 0135 xx 2 Leave space for cooling Do this by verifying that the air intake and exhaust holes on the sides and bottom of the cabinet are free of an...

Page 26: ...0 200 2264 00 5 mm 20 mm IEC 127 5 A T 250 V 159 0210 00 200 2265 00 To remove the front cover grasp the left and right edges and snap the cover off of the front subpanel To reinstall the cover align it to the front subpanel and snap it back on To power on the oscilloscope do the following steps 1 Check that the rear panel principal power switch is on see Figure 1 1 The principal power switch cont...

Page 27: ...the power switch The oscilloscope automatically performs power up tests each time it is turned on It will come up with a display screen that states whether or not it passed the self test To determine the self test results check the screen If the self test passed the status display screen will be removed after a few seconds If the self test fails call your local Tektronix Service Center Depending o...

Page 28: ...Operating Basics ...

Page 29: ...nel Map Display Map To Operate a Menu To Operate a Pop Up Menu The second section Tutorial contains example procedures that lead you through the fundamental tasks needed to display a waveform measurement It also includes an example procedure that teaches you how to store a setup of the oscilloscope controls for later use This section includes the following tuto rial examples Setting Up for the Exa...

Page 30: ...Overview 2 2 TDS 500D TDS 600B TDS 700D User Manual ...

Page 31: ...nels and the menu system of the TDS Oscilloscope These maps will help you understand and operate the oscilloscope This section also contains a visual guide to using the menu system Front Panel Map Left Side ON STBY Switch page 1 7 CLEAR MENU Removes Menus from the Display Main Menu Buttons page 2 7 Side Menu Buttons page 2 7 File System page 3 175 ...

Page 32: ...elay Triggering page 3 117 Edge Triggering page 3 82 Logic Triggering page 3 86 Pulse Triggering page 3 99 Comm Triggering page 3 113 Color page 3 47 Display Settings page 3 40 Remote Communication page 3 191 Vertical Controls page 3 16 Measurement System page 3 126 Masks page 3 148 Histograms page 3 145 Saving and Recalling Setups page 3 165 Saving and Recalling Waveforms page 3 168 File System p...

Page 33: ...ip Drive page 3 179 Principal Power Switch page 1 7 Serial Number SIGNAL OUTPUT Provides Analog Signal Output from CH3 or AX1 10 mV div AUX TRIGGER INPUT Provides Auxiliary Trigger Signal Input MAIN TRIGGER OUTPUT Provides Main Trigger TTL Output DELAYED TRIGGER OUTPUT Provides Delayed Trigger TTL Output RS 232 Connector page 3 180 Fuse page 1 6 Power Connector page 1 6 VGA Output ...

Page 34: ...ers page 3 81 Cursor measurements page 3 138 Trigger position T page 3 81 Shows what part of the waveform record is displayed page 3 20 Indicates position of vertical bar cursors in the waveform record page 3 142 The waveform record icon Trigger level on waveform may be an arrow at right side of screen instead of a bar When present the general purpose knob makes coarse adjustments when absent fine...

Page 35: ...t panel menu button Press SHIFT first if button label is blue 2 Press one of these buttons to select from main menu 3 Press one of these buttons to select from side menu if displayed 4 If side menu item has an adjustable value shown in reverse video adjust it with the general purpose knob or keypad ...

Page 36: ...Manual To Operate a Pop Up Menu Press to display pop up menus Press it again to make selection Alternatively press SHIFT first to make selection in the opposite direction A pop up selection changes the other main menu titles Press here to remove menus from screen ...

Page 37: ...DS Oscilloscope to reset it and to become acquainted with its display screen Once completed these tasks ready the oscilloscope for use in the examples that follow Remove all probes and signal inputs from the input BNC connectors along the lower right of the front panel Then using an appropriate probe such as the P6245 connect from the CH 1 connector of the oscilloscope to the PROBE COMPENSATION co...

Page 38: ...n Do the following steps to reset the oscilloscope to a known factory default state before doing the examples You can reset the oscilloscope anytime you begin a new task and need to start fresh with known default settings 1 Press the save recall SETUP button to display the Setup menu See Figure 2 2 Reset the Oscilloscope ...

Page 39: ...Figure 2 3 The Setup Menu 2 Press the button directly below the Recall Factory Setup menu item The display shows side menus along the right side of the screen The buttons to select these side menu items are to the right of the side menu Because an accidental instrument reset could destroy a setup that took a long time to create the oscilloscope asks you to verify the Recall Factory Setup selection...

Page 40: ...ormation to become familiar with the oscilloscope display before doing the examples Figure 2 5 shows the display that results from the oscilloscope reset There are several important points to observe The trigger level bar shows that the waveform is triggered at a level near 50 of its amplitude from step 4 The trigger position indicator shows that the trigger position of the waveform is located at ...

Page 41: ...et Time Base Readout Channel Reference Indicator Trigger Readout Trigger Position Indicator Trigger Level Bar Channel Readout Figure 2 5 The Display After Factory Initialization Right now the channel time base and trigger readouts appear in the graticule area because a menu is displayed You can press the CLEAR MENU button at any time to remove any menus and to move the readouts below the graticule...

Page 42: ...l SCALE knob clockwise Observe the change in the displayed waveform and the channel readout at the bottom of the display Figure 2 6 The VERTICAL and HORIZONTAL Controls 2 Turn the vertical POSITION knob first one direction and then the other Observe the change in the displayed waveform Then return the waveform to the center of the graticule 3 Turn the horizontal SCALE knob one click clockwise Obse...

Page 43: ...nob see Figure 2 7 first one direction and then the other Observe what happens when you move the trigger level above the highest part of the waveform Leave the trigger level in that untriggered state MAIN LEVEL Knob Figure 2 7 TRIGGER Controls 2 Press AUTOSET see Figure 2 8 and observe the stable waveform display NOTE The oscilloscope triggers on the input signal Sometimes the oscilloscope trigger...

Page 44: ...nual AUTOSETButton Figure 2 8 AUTOSET Button Location Figure 2 9 shows the display after pressing AUTOSET If necessary you can adjust the waveform now by using the knobs discussed earlier in this example Figure 2 9 The Display After Pressing Autoset ...

Page 45: ...nsation Example 2 Displaying Multiple Waveforms The TDS Oscilloscope can display up to four channels three math waveforms and four reference waveforms at one time Do the following tasks to learn how to display and control more than one waveform at a time The VERTICAL section of the front panel contains the channel selection buttons These buttons are CH 1 CH 2 CH 3 CH 4 and MORE See Fig ure 2 11 CH...

Page 46: ...you are not continuing from the previous example follow the instructions on page 2 9 under the heading Setting Up for the Examples 2 Press SETUP Recall Factory Setup main OK Confirm Factory Init side 3 Press AUTOSET 4 Press CH 2 The display shows a second waveform which represents the signal on channel 2 Since there is nothing connected to the CH 2 input connector this waveform is a flat line Ther...

Page 47: ...ce that the channel reference indicator for channel 2 moves with the waveform 6 Press VERTICAL MENU Coupling main The VERTICAL MENU button displays a menu that gives you control over many vertical channel parameters See Figure 2 12 Although there can be more than one channel displayed the vertical menu and buttons only adjust the selected channel Each menu item in the Vertical menu displays a side...

Page 48: ... already displayed To explore assigning controls to different channels do the following steps 1 Press CH 1 Observe that now the side menu title shows Ch1 see Figure 2 13 and that the light above CH 1 is lighted The highlighted menu item in the side menu has changed from the GND channel 2 setting to the DC coupling setting of channel 1 2 Press CH 2 DC side to toggle the selection to DC That returns...

Page 49: ...ready selected select that channel using the channel CH button 1 Press WAVEFORM OFF under the vertical SCALE knob Since the CH 2 light was on when you pressed the WAVEFORM OFF button the channel 2 waveform was removed The channel CH lights now indicate channel 1 Channel 1 has become the selected channel When you remove the last waveform all the CH lights are turned off 2 Press WAVEFORM OFF again t...

Page 50: ...ments do the following steps 1 If you are not continuing from the previous example follow the instructions on page 2 9 under the heading Setting Up for the Examples 2 Press SETUP Recall Factory Setup main OK Confirm Factory Init side 3 Press AUTOSET 4 Press MEASURE to display the Measure main menu See Figure 2 14 5 If it is not already selected press Select Measrmnt main The readout for that menu ...

Page 51: ...eform To take a measurement on another channel select that channel and then select the measurement Figure 2 14 Measure Main Menu and Select Measurement Side Menu 7 Press Positive Width side more side Rise Time side Positive Duty Cycle side All four measurements are displayed Right now they cover a part of the graticule area including the displayed waveforms 8 To move the measurement readouts outsi...

Page 52: ...t displayed 2 TDS 500D and TDS 700D models Press MEASURE Measure pop up Remove Measrmnt main Measurement 1 Measure ment 2 and Measurement 4 side to remove those measurements Leave the rise time measurement displayed Press to Remove Menus From Screen Figure 2 15 Four Simultaneous Measurement Readouts By default the measurement system will use the 10 and 90 levels of the waveform for taking the rise...

Page 53: ...ght corner of the screen shows the readout High Ref 90 The High Ref side menu item is highlighted and a box appears around the 90 readout in the High Ref menu item The box indicates that the general purpose knob is currently set to adjust that parameter Turn the general purpose knob left and right and then use it to adjust the high level to 80 That sets the high measurement reference to 80 Hint To...

Page 54: ...umeric Keypad Any time the general purpose knob is set to adjust a numeric parameter you can enter the value as a number using the keypad instead of using the knob Always end the entry of a number by pressing ENTER The numeric keypad also provides multipliers for engineering exponents such as m for milli M for mega and m for micro To enter these multiplier values press the SHIFT button and then pr...

Page 55: ...f your signal and that signal must have all the segments necessary for the measurement you want 1 Press Snapshot main to pop up a snapshot of all available single waveform measurements See Figure 2 17 The snapshot display includes the label Ch 1 meaning that the measure ments displayed are taken on the channel 1 waveform You take a snapshot of a waveform in another channel by first selecting that ...

Page 56: ... also provides a file system so that you can also save setups to a floppy disk an optional hard disk or an external Zip drive Do the following procedures to learn how to save and then recall a setup NOTE Besides being able to save several complete setups the oscilloscope remembers all the parameter settings when you power it off That feature lets you power on and continue where you left off withou...

Page 57: ... 3 Press AUTOSET 4 Press MEASURE Select Measrmnt main Frequency side Press the more side menu item if the Frequency selection does not appear in the side menu 5 Press CH 2 CLEAR MENU 6 Press SAVE RECALL SETUP Save Current Setup main to display the Setup main menu See Figure 2 18 CAUTION Setup locations in the side menu appear with the label user if they contain a stored setup or with the label fac...

Page 58: ...tup locations than can be listed at one time in the side menu The more side menu item gives you access to all the setup locations Once you have saved a particular setup you can change the settings as you wish knowing that you can come back to that setup at any time 8 TDS 600B models Press MEASURE Positive Width side to add that measurement to the display 9 TDS 500D and TDS 700D models Press MEASUR...

Page 59: ...e for the setup location you used in the last exercise The positive width measurement is now removed from the display because you selected it after you saved the setup The step just performed completes the examples You can restore the default settings by pressing SETUP Recall Factory Setup main OK Confirm Factory Init side Recall a Setup ...

Page 60: ...Tutorial 2 32 TDS 500D TDS 600B TDS 700D User Manual ...

Page 61: ...Reference ...

Page 62: ...op publishing system You may even want to digitally process them add multiply or divide them integrate differentiate or take an FFT of them The following two topics cover these tasks Saving Waveforms and Setups Using Features for Advanced Applications When performing any operation task you might want to display a comprehen sive listing of its current control settings on screen Or you may find it h...

Page 63: ...e 3 82 Triggering Based on Logic 3 86 Triggering on Pulses 3 99 Communications Triggering 3 113 Delayed Triggering 3 117 Taking Automated Measurements 3 126 Taking Cursor Measurements 3 138 Taking Graticule Measurements 3 144 Displaying Histograms TDS 500D and TDS 700D Models Only 3 145 Mask Testing Option 2C Only 3 148 Optimizing Measurement Accuracy SPC and Probe Cal 3 156 Saving and Recalling S...

Page 64: ...atus 3 197 Displaying the Banner 3 199 Displaying Help 3 199 Limit Testing 3 201 Waveform Math 3 206 Fast Fourier Transforms 3 209 Waveform Differentiation 3 228 Waveform Integration 3 233 Determining Status and Accessing Help Using Features for Advanced Applications ...

Page 65: ...Overview 3 4 TDS 500D TDS 600B TDS 700D User Manual ...

Page 66: ...uiring your waveform how to customize the display including selecting the color of the display elements and how to use the Zoom FastFrame and DPO features Coupling Waveforms to the Oscilloscope Tektronix produces a variety of probes and cables suitable for connecting various types of signals to the input channels of this product This subsection covers two topics important to coupling Probe Compens...

Page 67: ...e A 1 or your Tektronix Sales representative for the specific items offered for signal coupling NOTE A buffered passive probe such as the P6339A does not require com pensation When using a passive probe with any product compensate it to ensure maximum distortion free input to the oscilloscope and to avoid high frequency amplitude errors see Figure 3 1 To compensate your probe do the following step...

Page 68: ...get the correct impedance 5 TDS 500D and 700D models only Press SHIFT ACQUIRE MENU Mode main Hi Res side 6 TDS 600B models only Press SHIFT ACQUIRE MENU Mode main Average side Use the keypad to set Averages to 5 7 Adjust the probe until you see a square wave with a perfectly flat top on the display Figure 3 2 shows where the adjustment is located Figure 3 2 P6139A Probe Adjustment ...

Page 69: ...5 probe Such probes also reduce the maximum volts div to 10 V as just described This behavior results in 50 W nonAC coupling which is appropriate for active probes probes with a level 2 or 3 interface do not display W in the readout NOTE If you remove an active probe the oscilloscope does not switch coupling back to 1 M nor AC if it was previously selected Nor does the oscilloscope when you restor...

Page 70: ...ction button such as CH 1 corresponding to your input channel to make it active 2 Press AUTOSET If you use Autoset when one or more channels are displayed the oscilloscope selects the lowest numbered channel for horizontal scaling and triggering Vertically all channels in use are individually scaled If you use Autoset when no channels are displayed the oscilloscope will turn on channel one CH 1 an...

Page 71: ...ay Style Vectors Display Intensity Overall If less than 50 set to 75 Display Format YT FastFrame TDS 500D and 700D Models Only Off Horizontal Position Centered within the graticule window Horizontal Scale As determined by the signal frequency Horizontal Time Base Main Only Horizontal Record Length Unchanged Horizontal Lock Unchanged Horizontal Fit to Screen Unchanged DPO Acquisitions TDS 500D and ...

Page 72: ...itive Trigger Coupling DC Trigger Holdoff Default Holdoff Set equal to 5 horizontal divisions Adjustable Holdoff 250 ns Selection in Mode and Holdoff menu determines whether the default holdoff value or the adjustable hold value is used Vertical Scale As determined by the signal level Vertical Coupling DC unless AC was previously set AC remains unchanged Vertical Bandwidth Full Vertical Offset 0 v...

Page 73: ...Oscilloscope applies all actions based on a specific waveform such as taking measurements or applying any changes it receives to the vertical control settings to the selected waveform You can select a channel waveform a math waveform or a reference waveform This subsection describes how to select a waveform and how you can turn the display of a waveform off To determine which channel is currently ...

Page 74: ...channel selection buttons on the right of the display These buttons labeled CH 1 CH 2 CH 3 CH 4 and MORE select a channel and display it if its off The MORE button allows you to select internally stored Math and Ref waveforms for display and manipulation The selected channel is indicated by the lighting the LED above the button of the selected channel To Select and Remove Waveforms ...

Page 75: ...e waveform you have stored press MORE and select the waveform from the More menu Press WAVEFORM OFF while the MORE button is lit to remove the display of the waveform selected in the More menu When you turn off a waveform the oscilloscope automatically selects the next highest priority waveform Figure 3 4 shows the order of priority 1 CH1 2 CH2 3 CH3 or AX1 4 CH4 or AX2 1 MATH1 2 MATH2 3 MATH3 4 R...

Page 76: ...uisition View icons See figures 3 5 3 9 and 3 10 The Channel Reference icon at the left side of the display points to ground on the waveform record when offset is set to 0 V The oscilloscope contracts or expands the selected waveform around this point when you change the vertical scale The Record View at the top of the display indicates where the trigger occurs and what part of the waveform record...

Page 77: ...the front panel using dedicated control knobs To change the vertical scale and position 1 Turn the vertical SCALE knob Note only the scale of the selected wave form changes As you turn the vertical SCALE knob clockwise the value decreases resulting in higher resolution because you see a smaller part of the wave form As you turn it counterclockwise the scale increases allowing you to see more of th...

Page 78: ...f the selected waveform Adding divisions moves the waveform up and subtracting them moves the waveform down You also can adjust the waveform position using the offset option in the Vertical menu discussed later in this section Vertical Readout Figure 3 6 Vertical Readouts and Channel Menu By changing the vertical scale you can focus on a particular portion of a waveform By adjusting the vertical p...

Page 79: ...ling main DC AC GND or W side DC coupling shows both the AC and DC components of an input signal AC coupling shows only the alternating components of an input signal Ground GND coupling disconnects the input signal from the acquisition Input impedance lets you select either 1 M W or 50 W impedance NOTE If you select 50 impedance with AC coupling the digitizing oscillo scope will not accurately dis...

Page 80: ...reference point of the selected waveform to the center of the display Offset Use offset to subtract DC bias before examining a waveform For example you might want to display a small ripple for example 100 mV of ripple on a power supply output for example a 5 V output Adjust offset to keep the ripple on screen while setting the vertical scale sensitive enough to best display the ripple To adjust of...

Page 81: ... waveform record and the location of the trigger relative to the display See Figure 3 7 Check the Time Base readout at the lower right of the display to see the time division settings and the time base main or delayed being referred to See Figure 3 7 Also see Figure 3 5 on page 3 16 Since all live waveforms use the same time base the oscilloscope only displays one time base and time division setti...

Page 82: ...ne screen To change the horizontal scale and position 1 Turn the horizontal POSITION and horizontal SCALE knobs See Figure 3 8 2 If you want the POSITION knob to move faster press the SHIFT button When the light above the shift button is on and the display says Coarse Knobs in the upper right corner the POSITION knob positions waveforms more quickly Figure 3 8 Horizontal Controls When you select a...

Page 83: ...ttrigger portion All timing measurements in the record are made relative to the trigger event To define the trigger point position Press HORIZONTAL MENU Trigger Position main Set to 10 Set to 50 or Set to 90 side or use the general purpose knob or the keypad to change the value Record Length The number of points that make up the waveform record is defined by the record length To set the waveform r...

Page 84: ...until the waveform fits the screen To turn off this feature toggle Fit to Screen to OFF Horizontal Scale To change the horizontal scale time per division numerically in the menu instead of using the Horizontal SCALE knob Press HORIZONTAL MENU Horiz Scale main Main Scale or Delayed Scale side and use the keypad or the general purpose knob to change the scale values Horizontal Position To set the ho...

Page 85: ...de to acquire an extended length acquisition record After the data is acquired you can move to and display any portion of the data see Figure 3 9 NOTE To function properly Extended acquisition mode forces some oscilloscope modes and settings to new values Also measurements gating and cursors are restricted to the current waveform record Extended length Acquisition Record Waveform Record Display Mo...

Page 86: ...the length of the waveform record The settings for Record Length in the Horizontal menu and for Extended Acquisition mode on or off determine the length Acq Duration displays the time spanned by the acquisition data Waveform Record Start displays selects the percentage of the acquisition data that is before the waveform record of the selected channel and any locked live channels Fit To Screen dupl...

Page 87: ...ecord waveform Figure 3 10 Extended Acquisition Length and Zoom To perform tutorials that teach selecting scaling and positioning of waveforms see Example 1 Displaying a Waveform on page 2 13 and Example 2 Displaying Multiple Waveforms on page 2 17 To learn how to use delay with waveforms see Delayed Triggering on page 3 117 To learn how to magnify waveforms see Zooming on Waveforms on page 3 53 T...

Page 88: ...ng and acquisition modes beginning with Checking the Acquisition Readout on page 3 35 Acquisition is the process of sampling the analog input signal digitizing it to convert it into digital data and assembling it into a waveform record See Figure 3 11 The oscilloscope creates a digital representation of the input signal by sampling the voltage level of the signal at regular time intervals The samp...

Page 89: ...raging or looking for minimum and maximum values The methods of sampling and acquisition modes you choose determine how the oscilloscope assembles the sample points it acquires into the waveform record Samples for a record point Interval for one waveform record point Figure 3 12 Several Points May be Acquired for Each Point Used The two general methods of sampling are real time and equivalent time...

Page 90: ...titive waveform to obtain the sample density required for a waveform record See Figure 3 14 By doing so the oscilloscope lets you accurately acquire signals with frequencies much higher than its maximum real time bandwidth would allow Equivalent time sampling should only be used on repetitive signals 1st Acquisition Cycle 3rd Acquisition Cycle nth Acquisition Cycle 2nd Acquisition Cycle Record Poi...

Page 91: ...intervening points in the waveform record There are two options for interpolation linear or sin x x TDS 500D and TDS 700D models can also equivalent time sample to acquire more samples see Equivalent Time Sampling on page 3 29 Linear interpolation computes record points between actual acquired samples by using a straight line fit It assumes all the interpolated points fall in their appropriate poi...

Page 92: ...29 Table 3 2 How interleaving affects sample rate N Maximum digitizing rate1 No of channels on TDS 520D TDS 724D TDS 540D TDS 754D TDS 580D TDS 784D TDS 794D One 2 GS sec 2 GS sec 2 GS sec 4 GS sec Two 1 GS sec 2 GS sec 2 GS sec 2 GS sec Three or Four Not Available 1 GS sec 1 GS sec 1 GS sec 1 When real time sampling GS Gigasamples MS Megasamples All oscilloscopes in this manual support the follow...

Page 93: ...etect gathers peaks over many trigger events After each trigger event the oscilloscope acquires data and then compares the min max values from the current acquisition with those stored from previous acquisitions The final display shows the most extreme values for all the acquisitions for each point in the waveform record Average Mode Average mode lets you acquire and display a waveform record that...

Page 94: ...itions Calculates average of all samples in interval TDS 500D and TDS 700D Models Only Uses first sample in interval Calculates average value for each record point over many acquisitions Multiple Waveform Acquisitions Single Waveform Acquisition Peak Detect Sample Envelope Interval 1 2 3 4 Average Acquisition 1 2 3 Waveform Drawn on CRT Three Acquisitions from One Source Acquisition Mode Uses Peak...

Page 95: ...nternal hardware and computation limitations Si Sampling Interval for TDS 754D 1 ns t Sample Interval Time Div Number Of Points Div 5 ms Div 50 Points Div 100 ns Nd Number of points per decimation interval Dt Si 100 Resolution Enhancement bits 0 5 LOG2 Nd 3 extra bits Bits of Resolution Resolution Enhancement 3 bits 8 bits 11 bits Hi Res mode only works with real time noninterpolated sampling If y...

Page 96: ...change Acquisition Readout Figure 3 16 Acquisition Menu and Readout The oscilloscope provides several modes see The Acquisition Modes on page 3 31 for acquiring and converting analog data into digital form To choose how the oscilloscope will create points in the waveform record 1 Press SHIFT ACQUIRE MENU Mode main See Figure 3 16 2 TDS 600B Press Sample Envelope Average or Peak Detect side or TDS ...

Page 97: ...me sampling Press SHIFT ACQUIRE MENU Repetitive Signal main ON or OFF side ON Enable ET uses both the real time and the equivalent time sampling as appropriate see Table 3 4 OFF Real Time Only limits the oscilloscope to real time sampling If the oscilloscope cannot accurately get enough samples for a complete waveform it will interpolate NOTE The oscilloscope will use the interpolation method sele...

Page 98: ...or 2 3 or 4 1 2 3 or 4 Time base2 u50 ns RT3 RT RT RT RT RT RT 50 ns RT RT RT RT RT RT RT 25 ns RT ETI4 RT ETI RT RT ETI 12 5 ns ETI ETI ETI ETI RT ETI ETI t12 5 ns ETI ETI ETI ETI ETI ETI ETI 1 Note that the TDS 520D and TDS 724D can have no more that two channels on at a time 2 u means slower than t means faster than 3 RT abbreviates Real Time Sampling throughout this table 4 ETI abbreviates Equ...

Page 99: ... Sequence side That selection lets you run a single sequence of acquisitions by pressing the RUN STOP button In Sample Peak Detect or Hi Res mode the oscilloscope will acquire a waveform record with the first valid trigger event and stop Hi Res is available only on TDS 500D and TDS 700D models In Envelope or Average mode the oscilloscope will make the specified number of acquisitions to complete t...

Page 100: ...in menu NOTE For the oscilloscope to stop an acquisition when limit test conditions have been met limit testing must be turned ON using the Limit Test Setup main menu Setting up limit testing requires several more steps See Limit Testing on page 3 201 Under certain conditions a waveform may be aliased on screen Read the following description about aliasing and the suggestions for preventing it Abo...

Page 101: ...acquisition menu to Envelope or Peak Detect Envelope searches for samples with the highest and lowest values over multiple acquisitions Peak Detect mode does the same but in a single acquisition Either can detect faster signal components over time Try pressing the DPO acquisition button TDS 500D and TDS 700D models only DPO mode results in waveform displays similar to those obtained using an analo...

Page 102: ...ays waveform record points as dots Intensified Samples style also displays waveform record points as dots However the points actually sampled are displayed in the color labeled Zone in the Display Colors menus In addition to choosing Intensified Samples in the side menu the oscilloscope must be interpolating equivalent time must be off for TDS 500D and TDS 700D models or Zoom must be on with its h...

Page 103: ...s To set the intensity Press DISPLAY Settings main Display pop up Intensity main Text Grat or Waveform side Enter the intensity percentage values with the keypad or the general purpose knob All intensity adjustments operate over a range from 20 close to fully off to 100 fully bright Readout options control whether the trigger indicator trigger level bar and current date and time appear on the disp...

Page 104: ...the waveform record 3 Press Trigger Bar Style side to select either the short or the long trigger bar or to turn the trigger bar off See Figure 3 20 Note that both styles are shown for illustrating purposes but you can only display one style at a time The trigger bar is only displayed if the trigger source is an active displayed waveform Also two trigger bars are displayed when delay triggerable a...

Page 105: ...S 600B Press DISPLAY Settings main Display pop up Filter main Sin x x Interpolation or Linear Interpolation side TDS 500D and TDS 700D Models Press DISPLAY Settings main Display pop up Normal pop up Filter main Sin x x Interpola tion or Linear Interpolation side NOTE When the horizontal scale is set to the faster rates 10 ns div for the TDS 600B see Table 3 4 on page 3 37 for rates specific to the...

Page 106: ... either NTSC or PAL graticules automatically changes the vertical scale position settings coupling and sets to zero any vertical offset of any channel displayed These settings are not restored after switching to other graticule types Therefore you might want to recall the factory setup or other stored setup after selecting a different graticule The oscilloscope displays waveforms in either of two ...

Page 107: ...e pair on pressing WAVEFORM OFF for either source in the pair removes both sources from the display Table 3 5 XY Format pairs XY Pair X Axis source Y Axis source Ch 1 and Ch 2 Ch 1 Ch 2 Ch 3 and Ch 4 Ax1 and Ax2 Ch 3 Ax1 Ch 4 Ax2 Ref 1 and Ref 2 Ref 1 Ref 2 Ref 3 and Ref 4 Ref 3 Ref 4 Since selecting YT or XY affects only the display the horizontal and vertical scale and position knobs and menus c...

Page 108: ...the monochrome TDS 500D Oscilloscopes To bring up the Color menu 1 Press DISPLAY to show the Display menu 2 Press Settings in the main menu until you select Color from the pop up menu See Figure 3 21 The Color menu allows you to alter color settings for various display compo nents such as waveforms and text The Display menu allows you to adjust the style intensity level graticule and format featur...

Page 109: ...sing certain color hardcopy formats The default colors in the this palette comprise a white background and fully saturated primary colors which generally produce the best result To change the color of the current palette select a color and vary these attributes Hue which is the wavelength of light reflected from the surface It varies continuously along the color spectrum as produced by a rainbow H...

Page 110: ... and use the general purpose knob or keypad to select the desired hue Values range from 0 to 359 Sample values are 0 blue 60 magenta 120 red 180 yellow 240 green and 300 cyan 5 Choose Lightness from the side menu and use the general purpose knob or keypad to select the lightness you desire A value of 0 results in black A value of 50 provides the nominal color A value of 100 results in white 6 Choo...

Page 111: ...ents If the math waveform is based on dual waveforms the math waveform will use the color of the first constituent waveform To return to the factory defaults select Reset to Factory Color To define reference waveform colors 1 Press Map Reference in the main menu See Figure 3 23 2 Select one of the four reference waveforms by pressing Ref in the side menu 3 To assign the selected reference waveform...

Page 112: ...le Collision Contrast to ON in the side menu to mark collision zones with a special color To restore colors to their factory default settings 1 TDS 600B models Press the main menu Restore Colors item See Figure 3 24 TDS 500D and TDS 700D models Press the main menu Options Restore item 2 Select the object s you want to restore by pressing Reset Current Palette To Factory Reset All Palettes To Facto...

Page 113: ...tensity using the DPO Brightness and Contrast menu items see page 3 63 Percentages allows you to set the Color Mapping percentages in the Map Colors menu To set the percentages that map the acquisition database values to display indices TDS 500D and 700D models only do the following steps 1 Press the Percentage Color Mapping main menu item 2 Toggle Color Index side to the color index range to be a...

Page 114: ...u button Zoom is also handy if you have acquired a waveform at the fastest time per division and want to further expand the waveform horizontally To help you use zoom effectively consider how it operates on waveforms When zooming vertically the oscilloscope expands or contracts the selected waveform only Also the oscilloscope only positions the selected waveform when in Zoom When zooming horizonta...

Page 115: ...izontal and vertical expansion factors The Zoom readout appears at the top of the display when zoom is on See Figure 3 25 on page 3 56 Dual window preview mode does not display the Zoom readout To use Zoom select a waveform turn Zoom on and magnify that waveform using the vertical and horizontal scale knobs 1 Press any of waveform selection buttons CH 1 through CH 4 on the right side of the displa...

Page 116: ... at the same time If a reference or math waveform is selected and Horizontal Lock set to Live only the selected reference or math waveform is magnified and positioned All all waveforms displayed live math and reference can be magnified and positioned horizontally at the same time 5 Press ZOOM Lock main All Live or None side NOTE Although Zoom must be turned on to control which waveforms Zoom affec...

Page 117: ...e Factors resets only for live waveforms as opposed to reference waveforms Reset All Factors resets for all waveforms The oscilloscope can display and control a waveform that is both zoomed and unzoomed magnified and unmagnified To do so it creates two 1 2 height graticules or windows and displays the magnified waveform in the upper and the unmagnified waveform in the lower graticule To use Dual W...

Page 118: ...ied waveform press Selected Grati cule main Upper side Use the vertical and horizontal knobs to scale and position the magnified waveform Note that as you scale or move the magnified waveform the oscilloscope scales or moves the box relative to the unmagnified waveform so the box encloses only the waveform portion magnified in the upper graticule In Dual Window Zoom mode the oscilloscope does not ...

Page 119: ... the first by a time equal to one box Doubling the zoom factor halves the time enclosed by either box and therefore halves the minimum offset time The oscilloscope retains any value input that is less than the minimum time available as a request if you enter that value using the keypad Increasing the zoom factor or decreasing the horizontal scale to a setting that allows the requested value sets o...

Page 120: ... reduction enables DPO mode to capture and display transient deviations such as glitches or runt pulses often missed during longer dead times that accompany normal DSO operation DPO mode can also display waveform phenomena at an intensity that reflects their rate of occurrence DPO XY and XYZ modes also provide intensity information by accepting continuous non triggered data from the input channels...

Page 121: ... setting a decay constant To display only the most recent acquisition select No Persistence DPO adds intensity or gray scale information like an analog oscilloscope to each point in the waveform array The waveform array is a two dimensional array of display pixels Display pixel values are incremented each time they are written by a waveform acquisition Pixels may saturate or overflow if the databa...

Page 122: ...dated Display Updated Display Variable Persistence Display Updated Variable Persistence Display Updated Variable Persistence Display Dead Time Dead Time Dead Time Normal DSO Mode DPO 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 Fig...

Page 123: ...Acquiring and Displaying Waveforms 3 62 TDS 500D TDS 600B TDS 700D User Manual Figure 3 29 DPO Display Figure 3 30 Normal DSO Display ...

Page 124: ...lay T Trigger Point Trigger Bar Style and Display Date Time in the side menu to the settings desired DPO adds three intensity settings that set the brightness and contrast of displayed images To set the intensity do the following steps 1 Press DISPLAY Settings main Display pop up Intensi ty main DPO Brightness or DPO Contrast side Enter the intensity and contrast values with the keypad or the gene...

Page 125: ...Press DISPLAY Settings main Display pop up Mode main DPO pop up Format RO main XY YT or XYZ side YT is the conventional oscilloscope display format It shows a signal voltage the vertical axis as it varies over time the horizontal axis XY format compares the voltage levels of two waveform records point by point see Figure 3 31 That is the oscilloscope displays a graph of the voltage of one waveform...

Page 126: ... and Ref 4 Ref 3 Ref 4 XYZ format compares the voltage levels of the CH 1 X and CH 2 Y waveform records point by point as in XY format The displayed waveform intensity is modulated by the CH 3 Z waveform record XYZ format is not triggered XYZ format is not available on 2 2 channel oscilloscopes A 5 division signal including position and offset on CH 3 produces a blank screen a 5 division signal pr...

Page 127: ...d Single Acquisition Sequence acquisition modes and Autosave mode Intensified time base Record lengths longer than 500 samples Interpolation equivalent time sampling is used instead Vectors when in equivalent time mode waveforms are displayed as Dots instead To determine under what conditions the oscilloscope normally interpolates or uses equivalent time see Selecting Repetitive Sampling on page 3...

Page 128: ...he math waveform or select a channel waveform and continue using DPO mode DPO displays using a persistence display style see display menu If you select Intensified time base the intensified zone is controlled by Horizontal Scale and Delay time settings as when DPO is off but the zone is masked by the persis tence display mode and cannot be seen Turn off DPO to display the intensified zone Using Fa...

Page 129: ...e Length or Frame Count side and use the general purpose knob to enter FastFrame parameters Frame Length refers to the number of samples in each acquisition Frame count refers to the number of acquisitions to store in the acquisition memory of the channel The oscilloscope will set the record length to a value greater than or equal to the product of the frame count and the frame length If the produ...

Page 130: ... Then use the general purpose knob or the keypad to select the reference frame This value sets the starting frame when measuring the relative time between two frames 3 To select the Position Frame press HORIZONTAL FastFrame Setup main Position Frame side Then use the general purpose knob or the keypad to select the position frame This value sets the ending frame when measuring the relative time be...

Page 131: ...TAL FastFrame Setup main Snapshot side The first column shows the delta time between the reference frame frame 6 in the figure and every other frame The second column shows the delta time between each frame and its predecessor To take another measurement press Again side As you scroll the list the position frame will track the scroll bar location Figure 3 34 Horizontal Menu FastFrame Snapshot View...

Page 132: ...le or Hi Res frames and frame 11 will show the average of frames 1 through 10 If there is not room for one additional frame the envelope or average of the frames replaces the display of the last acquired frame Average and envelope counts have no affect in FastFrame You can press RUN STOP to terminate a FastFrame sequence If any frames were acquired they are displayed If no frames were acquired the...

Page 133: ...ngle Sequence Acquisition see Acquire menu Stop After menu With Single Sequence selected you will see the current acquisition sequence otherwise the display lags the current sequence by one sequence You can also see the current sequence by pressing the RUN STOP button to stop the acquisition TimeStamp uses the measurement readouts therefore turning on FastFrame TimeStamp turns off Measurements and...

Page 134: ...rpose trigger type edge see Triggering on a Waveform Edge on page 3 82 To logic trigger based on an input pattern state or setup hold violation see Triggering Based on Logic on page 3 86 To pulse trigger based on various pulse types glitch runt or their parame ters width slew rate see Triggering on Pulses on page 3 99 To trigger on communication signals TDS 500D and 700D Option 2C models only see ...

Page 135: ...cept another trigger until the acquisition is complete You can derive your trigger from the following sources Input channels provide the most commonly used trigger source You can select any one of the four input channels The channel you select as a trigger source will function whether it is displayed or not AC Line Voltage is the trigger source most often used when you are looking at signals relat...

Page 136: ...rces Triggering occurs when the Boolean conditions are satisfied A third class setup hold triggers when data in one trigger source changes state within the setup and hold times that you specify relative to a clock in another trigger source Logic triggers are available on the main trigger system only Comm available as option 2C is a special trigger used on communication signals See tables 3 9 and 3...

Page 137: ...onitoring of a power supply output is an example of such an application When the oscilloscope recognizes a trigger event it disables the trigger system until acquisition is complete In addition the trigger system remains disabled during the holdoff period that follows each acquisition You can set holdoff time to help ensure a stable display For example the trigger signal can be a complex waveform ...

Page 138: ...he waveform record the trigger occurs It lets you properly align and measure data within records 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 To help you visualize the trigger position setting the top part of the display has an icon indicating where the trigger occurs in the waveform record You sel...

Page 139: ...yed trigger system that provides an edge trigger no pulse or logic triggers When using the delayed time base you can also delay the acquisition of a waveform for a user specified time or a user specified number of delayed trigger events or both after a main trigger event See Delayed Triggering on page 3 117 to learn how to use delay Triggering from the Front Panel The trigger buttons and knob let ...

Page 140: ...main trigger level To modify the delayed trigger level use the Level item in the Delayed Trigger menu To force the oscilloscope to immediately start acquiring a waveform record even without a trigger event press the FORCE TRIG front panel button Forcing a trigger is useful when in normal trigger mode and the input signal is not supplying a valid trigger By pressing FORCE TRIG you can quickly confi...

Page 141: ...ADY and ARM in the Trigger control area See Fig ure 3 39 When TRIG D is lighted it means the oscilloscope has recognized a valid trigger and is filling the posttrigger portion of the waveform When READY is lighted it means the oscilloscope can accept a valid trigger event and the oscilloscope is waiting for that event to occur When ARM is lighted it means the trigger circuitry is filling the pretr...

Page 142: ...sition and Level Indicators To see the trigger point and level on the waveform display check the graphic indicators Trigger Position and Trigger Bar Figure 3 41 shows the trigger point indicator and trigger level bar Both the trigger point indicator and level bar are displayed from the Display menu See Set Display Readout Options on page 3 42 for more information The trigger point indicator shows ...

Page 143: ...r Pulse pop up Triggering on a Waveform Edge The TDS Oscilloscope can trigger on an edge of a waveform An edge trigger event occurs when the trigger source passes through a specified voltage level in a specified direction the trigger slope You will likely use edge triggering for most of your measurements This subsection describes how to use edge triggering how to select edge type source coupling s...

Page 144: ...e Main Trigger Level Figure 3 42 Edge Trigger Readouts Use the edge trigger menu to select edge triggering and to perform the proce dures for source coupling slope trigger level mode and holdoff that follow To bring up the Edge Trigger menu press TRIGGER MENU Type main Edge pop up See Figure 3 43 Figure 3 43 Main Trigger Menu Edge Type To Select Edge Triggering ...

Page 145: ...tes signals above 30 kHz LF Rej removes the low frequency portion of the triggering signal Low frequency rejection attenuates signals below 80 kHz Noise Rej provides lower sensitivity Noise Rej requires additional signal amplitude for stable triggering reducing the chance of falsely triggering on noise NOTE When you select Line as the trigger source the oscilloscope uses AC coupling to couple a sa...

Page 146: ...ob press the SHIFT button before turning the knob When the light above the SHIFT button is on and the display says Coarse Knobs in the upper right corner the general purpose knob speeds up significantly You can set holdoff from 250 ns minimum holdoff available to 12 seconds maximum available See Holdoff Variable Main Trigger in the TDS 500D TDS 600B TDS 700D Oscilloscopes Performance Verification ...

Page 147: ...smaller setting after 200 mV the trigger range is 1 2 V which is smaller than the typical TTL 1 4 V or ECL 1 3 V level Set to 50 fixes the trigger level to approximately 50 of the peak to peak value of the trigger source signal Triggering Based on Logic The TDS Oscilloscope can trigger on a logic or binary pattern and on the state of a logic pattern at the time it is clocked It can also trigger on...

Page 148: ...p hold trigger occurs when a logic input changes state inside of the setup and hold times relative to the clock When you use setup hold triggering you define The channel containing the logic input the data source and the channel containing the clock the clock source The direction of the clock edge to use The clocking level and data level that the oscilloscope uses to determine if a clock or data t...

Page 149: ...illoscope triggers NOR Clocked NOR If none of the preconditions selected for the logic inputs3 are TRUE then the oscilloscope triggers 1 Note that for state class triggers the definition must be met at the time the clock input changes state 2 The definitions given here are correct for the Goes TRUE setting in the Trigger When menu If that menu is set to Goes False swap the definition for AND with ...

Page 150: ...d triggers on data that does not become stable long enough before the clock setup time violation or that does not stay stable long enough after the clock hold time violation Negative settings for setup or hold times skew the setup hold violation zone to locate it before or after the clocking edge See the bottom and center waveforms of Figure 3 44 The oscilloscope can then detect and trigger on vio...

Page 151: ...H Hold Time Setup Hold Violation Zone TS TH TS TH must be 2 ns 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 44 Violation Zones for Setup Hold Triggering ...

Page 152: ...es or the Levels setup hold class menu Therefore the Trigger Level readout will disappear on the display and the Trigger Level knob can be used to set the selected level while the Main Trigger menu is set to Logic When you select the logic class Pattern the oscilloscope will trigger on a specified logic combination of the four input channels Pages 3 86 through 3 88 describe how pattern triggers wo...

Page 153: ... pop up Define Inputs main Ch1 Ch2 Ch3 or Ch4 side 2 Repeatedly press each input selected in step 1 to choose either High H Low L or Don t Care X for each channel see Figure 3 46 To Set Thresholds To set the logic threshold for each channel 1 Press TRIGGER MENU Type main Logic pop up Class main Pattern pop up Set Thresholds main Ch1 Ch2 Ch3 or Ch4 side 2 Use the MAIN TRIGGER LEVEL knob the general...

Page 154: ...an be set for all standard trigger types and classes To set mode and holdoff refer to To Set Mode Holdoff on page 3 85 To learn more about trigger mode and holdoff see the descriptions Trigger Modes and Trigger Holdoff on page 3 75 You can also time qualify a pattern logic trigger That is you specify a time that the boolean logic function AND NAND OR or NOR must be TRUE logic high To specify the t...

Page 155: ...re than or shorter for TRUE for less than then it triggers a waveform display at the point the logic condition became FALSE This time can be and usually is different from the time set for TRUE for more than or TRUE for less than In Figure 3 47 the delay between the vertical bar cursors is the time the logic function is TRUE Since this time is more 216 ms than that set in the TRUE for more than men...

Page 156: ... Care X side for the first three channels The choices for Ch4 are rising edge and falling edge Set Thresholds To set the logic threshold for each channel 1 Press TRIGGER MENU Type main Logic pop up Class main State pop up Set Thresholds main Ch1 Ch2 Ch3 or Ch4 side 2 Use the MAIN TRIGGER LEVEL knob the general purpose knob or the keypad to set each threshold Define Logic To choose the type of logi...

Page 157: ...ld triggering do the following procedures Select Setup Hold Triggering Press TRIGGER MENU Type main Logic pop up Class main Setup Hold pop up Define the Data Source To select the channel that is to contain the data signal 1 Press TRIGGER MENU Type main Logic pop up Class main Setup Hold pop up Data Source main 2 Press any one of Ch1 Ch2 Ch3 or Ch4 side Do not select the same channel for both the d...

Page 158: ...falling depending on which you select occurs The oscilloscope uses the point the clock crosses the clock level as the reference point from which it measures setup and hold time settings Set the Setup and Hold Times To set the setup time and the hold time relative to the clock 1 Press TRIGGER MENU Type main Logic pop up Class main Setup Hold pop up Set Hold Times main Setup Time or Hold Time side S...

Page 159: ...both setup and hold time Positive values set the oscilloscope 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 entering negative values See Figure 3 44 on page 3 90 To Set Mode and Holdoff Mode and holdoff can be set for all ...

Page 160: ... the trigger source detects a short pulse that crosses one threshold but fails to cross a second threshold before recrossing the first You can set the oscilloscope to detect positive or negative runt pulses A width trigger occurs when the trigger source detects a pulse that is inside or optionally outside some specified time range defined by the upper limit and lower limit The oscilloscope can tri...

Page 161: ...e threshold going positive but fails to cross a second threshold before recrossing the first going negative Runt negative Triggering occurs if the oscilloscope detects a negative going pulse that crosses one threshold going negative but fails to cross a second threshold before recrossing the first going positive Runt either Triggering occurs if the oscilloscope detects a positive or negative going...

Page 162: ...ering occurs if the oscilloscope detects a positive or negative pulse edge that first crosses one threshold and then crosses the other threshold The pulse must travel between the two levels at a rate faster or slower than user specifies the user specified slew rate for triggering to occur Timeout stays high Triggering occurs if the signal stays higher than the trigger level for longer than the tim...

Page 163: ...becomes the trigger source for all four trigger classes Select the Polarity Width To specify polarity positive negative or either and width of the glitch do the following steps 1 Press TRIGGER MENU Type main Pulse pop up Polarity Width main Positive Negative or Either side Positive looks at positive going pulses Negative looks at negative going pulses Either looks at both positive and negative pul...

Page 164: ...f you select Set to TTL the oscilloscope sets the trigger level to the TTL switching threshold If you select Set to ECL the oscilloscope sets the trigger level to the ECL switching threshold If you select Set to 50 the oscilloscope searches for the point halfway between the peaks of the trigger source signal and sets the trigger level to that point To Set Mode and Holdoff Mode and holdoff can be s...

Page 165: ...ses Set to Trig When To determine how wide a runt pulse the oscilloscope will trigger on 1 Press TRIGGER MENU Type main Pulse pop up Class main Runt pop up Trig When main 2 Press Occurs to trigger on all runt pulses regardless of width 3 Press Runt is Wider Than side to trigger only on runt pulses that exceed the width you set Enter the width using the general purpose knob or keypad Set the Thresh...

Page 166: ...larity side menu determines the order that the threshold must be crossed for a runt trigger to occur Positive requires that the lower threshold must be first crossed going positive then recrossed going negative without the upper threshold being crossed at all Negative requires that the upper threshold must be first crossed going negative then recrossed going positive without the lower threshold be...

Page 167: ...dth pop up Select the Source Press TRIGGER MENU Type main Pulse pop up Source main Ch1 Ch2 Ch3 or Ch4 side The source selected becomes the trigger source for all four trigger classes Select the Polarity Press TRIGGER MENU Type main Pulse pop up Class main Width pop up Polarity main Positive or Negative side Set to Trig When To set the range of widths in units of time the trigger source will search...

Page 168: ...mode and holdoff see Trigger Modes and Trigger Holdoff on page 3 75 When you select the pulse class Slew Rate the oscilloscope will trigger on a pulse edge that traverses between an upper and lower threshold faster or slower than a slew rate you specify To set up for slew rate triggering do the following procedures Select Slew Rate Triggering Press TRIGGER MENU Type main Pulse pop up Class main Sl...

Page 169: ...e the general purpose knob or keypad to set the values for the high and low thresholds Hint To use the Trigger Bar feature to set the threshold levels on the pulse edge press DISPLAY Readout Options main Trigger Bar Style side until Long appears in that menu item The threshold settings determine the voltage component of slew rate Volts Se cond To finish specifying the slew rate set the time compon...

Page 170: ...gering 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 oscilloscope cannot slew rate trigger on pulse edges that traverse between threshold levels in 600 ps or less Also to reliably slew rate trigger a pulse must have a width of 7 5 ns or more A pulse of less width may trigger on the wrong slope or not trigg...

Page 171: ...w rate of the pulse instead it is the slew rate against which the oscilloscope compares the slew rate of pulse see above You set the slew rate setting indirectly by setting the ratio of delta voltage to delta time as Substituting the threshold and delta time settings for the setup in Fig ure 3 52 ń The trigger bar indicators long horizontal bars point to the upper and lower thresholds The pair cur...

Page 172: ...select the pulse class Timeout the TDS oscilloscope will trigger on a pulse change that does NOT occur within the specified limits That is the trigger will occur when depending on the polarity you select the signal stays higher or stays lower than the trigger level for the timeout value To set up for timeout triggering do the following procedures Select Timeout Triggering Press TRIGGER MENU Type m...

Page 173: ...o 50 side If you select Level you set the trigger level by entering a value with the general purpose knob or the keypad If you select Set to TTL the oscilloscope sets the trigger level to the TTL switching threshold If you select Set to ECL the oscilloscope sets the trigger level to the ECL switching threshold If you select Set to 50 the oscilloscope searches for the point halfway between the peak...

Page 174: ...TE To function properly Comm triggers force some oscilloscope modes and settings to new values Also selecting a mask from the MEASURE menu selects the Comm trigger settings for that mask However selecting a Comm trigger does not select a mask Table 3 9 Comm triggers Standard Name Code1 Bit Rate OC1 STM0 NRZ 51 84 Mb s OC3 STM1 NRZ 155 52 Mb s OC12 STM4 NRZ 622 08 Mb s DS0 Sgl Masks2 64 kb s DS0 Db...

Page 175: ...RZ 125 Mb s 4 2 2 SMPTE 259M D NRZ 360 Mb s 10Base T Ethernet NRZ 10 Mb s 100Base T Ethernet NRZ 125 Mb s Gigabit Ethernet NRZ 1 25 Gb s 1 AMI Alternate Mark Inversion CMI Code Mark Inversion NRZ Non return to Zero 2 These Telecom DS0 standards are automatically selected from the Mask Menu The trigger uses Pulse Width trigger Use the Comm trigger menu to select communications triggering and to per...

Page 176: ...he code press TRIGGER MENU Type main Comm pop up Code main AMI CMI or NRZ pop up You can set mode and holdoff for all standard trigger types and classes To set mode and holdoff refer to Set Mode Holdoff on page 3 85 To learn more about trigger mode and holdoff see Trigger Modes and Trigger Holdoff on page 3 75 Figure 3 53 Main Trigger Menu Comm Type To Select a Source To Specify Code To Set Mode H...

Page 177: ...ulse Form main 2 Select an Pulse Form from the side menu Only pulse forms for the selected Code are displayed See Table 3 10 for a list of pulse forms Table 3 10 Communications pulse forms AMI CMI NRZ Isolated 1 Plus One Eye Diagram Isolated 1 Minus One Rise Eye Diagram Zero Fall Eye Diagram Pattern 0 7 Press the TRIGGER MENU Type main Comm pop up Level or Threshold main High Low Level Set to TTL ...

Page 178: ...es a trigger signal and an input source dedicated to that signal You can only use delay with respect to the main edge trigger and certain classes of main pulse triggers This section describes how to delay the acquisition of waveforms There are two different ways to delay the acquisition of waveforms delayed runs after main and delayed triggerable Only delayed triggerable uses the delayed trigger s...

Page 179: ...veform record and then displays it Refer to Figure 3 56 for a more detailed look at how delayed records are placed in time relative to the main trigger NOTE Due to hardware limitations the delayed time base cannot be made triggerable when the main trigger type is Logic any class or when the main trigger type is Pulse with Runt or Slew Rate classes selected For these settings the oscilloscope will ...

Page 180: ...ne corresponds to the end of the delayed record NOTE The intensified zone is not visible when in DPO mode TDS 500D and TDS 700D models only see Incompatible Modes on page 3 66 To make sure that the Main Trigger menu settings are compatible with Delayed Triggerable and to select that mode do the following steps 1 Press TRIGGER MENU 2 If Type is set to Logic press Type main to change it to either Ed...

Page 181: ... Delayed Trigger Source Start Posttrigger Acquisition First Trigger After Delay Delayed Trigger Waveform Record Main Trigger Source Delayed Trigger Source Delayed Triggerable By Time Delayed Runs After Main Pretrigger Record Posttrigger Record Waiting for nth Event Where n 4 Delayed Triggerable By Events Time Main Trigger Source Delayed Trigger Source Delayed Trigger Waveform Record Delayed Trigge...

Page 182: ...sible start point of the delayed time base record The end of the zone continues to the end of main time base since a delayed time base record may be triggered at any point after the delay time elapses To learn how to define the intensity level of the normal and intensified waveform see Adjust Intensity on page 3 42 Now you need to bring up the Delayed Trigger menu so that you can define the delaye...

Page 183: ... Trigger DC or Noise Rej side to define how the input signal will be coupled to the delayed trigger Main Trigger sets delayed trigger coupling to match the main trigger coupling setting For descriptions of the DC and Noise Rej coupling types see To Specify Coupling on page 3 84 10 Press Slope main to select the slope that the delayed trigger will occur on Choose between the rising edge and falling...

Page 184: ...to ECL fixes the trigger level at 1 3 V Set to 50 fixes the delayed trigger level to 50 of the peak to peak value of the delayed trigger source signal NOTE Trigger level range is always 12 divisions from the center of the vertical range Some combinations of vertical scale offset and position result in a trigger range that prevents Set to TTL or Set to ECL from achieving their desired settings In t...

Page 185: ...Triggering on Waveforms 3 124 TDS 500D TDS 600B TDS 700D User Manual ...

Page 186: ...r voltage between two locations in a waveform record Graticule for making quick estimates by counting graticule divisions on screens Histogram for displaying and automatically measuring how your vertical and horizontal units vary in the histogram box Masks for mask counting selecting a mask or editing a mask This section also tells you how to use Probe Cal Channel Probe Deskew and Signal Path Comp...

Page 187: ... Snapshot of Measurements on page 3 135 The TDS Oscilloscope provides you with automatic measurements Table 3 11 lists brief definitions of the automated measurements in the oscilloscope for more details see Appendix B Algorithms page B 1 Table 3 11 Measurement definitions Name Definition Amplitude Voltage measurement The high value less the low value measured over the entire waveform or gated reg...

Page 188: ...ef and Low Ref values are needed as in fall time and rise time measurements May be calculated using either the min max or the histogram method With the min max method it is the minimum value found With the histogram method it refers to the most common value found below the midpoint Measured over the entire waveform or gated region Maximum Voltage measurement The maximum amplitude Typically the mos...

Page 189: ...in the waveform or gated region to rise from a Low Ref value default 10 to a High Ref value default 90 of its final value RMS Voltage measurement The true Root Mean Square voltage over the entire waveform or gated region Extinction Ratio Optical measurement TDS 500D and TDS 700D only The value High Low Extinction Optical measurement TDS 500D and TDS 700D only The value 100 Extinction Ratio Extinct...

Page 190: ... up Select Measrmnt main 3 Select a measurement from the side menu Note the following rules for taking automatic measurements You can only take a maximum of four measurements at a time To add a fifth you must remove one or more of the existing measurements To vary the source for measurements simply select the other channel and then choose the measurements you want Be careful when taking automatic ...

Page 191: ...from the display according to their readout position To remove measurements do the following steps 1 TDS 600B Press MEASURE Remove Measrmnt main 2 TDS 500D and TDS 700D Press MEASURE Measure pop up Remove Measrmnt main 3 Select the measurement to remove from the side menu If you want to remove all the measurements at one time press All Measurements side The gating feature lets you limit measuremen...

Page 192: ...ing main Gate with V Bar Cursors side See Figure 3 61 2 TDS 500D and TDS 700D Press MEASURE Measure pop up Gating main Gate with V Bar Cursors side See Figure 3 61 Figure 3 61 Measure Menu Gating 3 Using the general purpose knob move the selected the active cursor Press SELECT to change which cursor is active Displaying the cursor menu and turning V Bar cursors off will not turn gating off Gating ...

Page 193: ... TDS 700D models Press MEASURE Measure pop up Level Setup main Histogram or Min Max side If you select Min Max you may also want to check and or revise reference levels using this side menu Histogram sets the values statistically It selects the most common value either above or below the midpoint depending on whether it is defining the high or low reference level Since this statistical approach ig...

Page 194: ... values For example if your are measuring specifications on an RS 232 C circuit set the levels precisely to RS 232 C specification voltage values by defining the high and low references in units Figure 3 62 Measure Menu Reference Levels 3 Press High Ref Mid Ref Low Ref or Mid2 Ref side High Ref Sets the high reference level The default is 90 Mid Ref Sets the middle reference level The default is 5...

Page 195: ...ure Delay to 2 TDS 500D and TDS 700D Press MEASURE Measure pop up Select Measrmnt main Delay side Delay To main Measure Delay to 3 Press Measure Delay to side repeatedly to choose the delay to waveform The choices are Ch1 Ch2 Ch3 Ch4 Math1 Math2 Math3 Ref1 Ref2 Ref3 and Ref4 Figure 3 63 Measure Delay Menu Delay To The steps just performed select the waveform you want to measure to note that the wa...

Page 196: ...ecific pair of edges out of a stream 6 To take the measurement you just specified press Delay To main OK Create Measurement side To exit the Measure Delay menu rather than creating a delay measurement press CLEAR MENU which returns you to the Measure menu Sometimes you may want to see all of the automated measurements on screen at the same time To do so use Snapshot Snapshot executes all of the si...

Page 197: ... Then do the following steps 1 TDS 600B Press MEASURE SNAPSHOT main 2 TDS 500D and TDS 700D Press MEASURE Measure pop up SNAPSHOT main 3 Press either SNAPSHOT main or AGAIN side to take another snapshot NOTE The Snapshot display tells you the channel that the snapshot is being made on 4 Push Remove Measrmnt Snapshot Display Figure 3 64 Snapshot Menu and Readout ...

Page 198: ... You might measure the frequency of the noise and not the desired waveform Note that pushing any button in the main menu except for Snapshot or any front panel button that displays a new menu removes the snapshot from display Use High Low Setup page 3 132 Reference Levels page 3 132 and Gated Measurements page 3 130 with Snapshot exactly as you would when you display individual measurements from t...

Page 199: ...t statistics press MEASURE Measure pop up Statistics main Statistics Off side To perform a tutorial that shows you how to take automatic measurements see Example 3 Taking Automated Measurements on page 2 22 To learn how the oscilloscope calculates each automatic measurement see Appendix B Algorithms on page B 1 Taking Cursor Measurements The TDS Oscilloscope provides cursors that measure the diffe...

Page 200: ...rsors has a long vertical bar paired with an X The Xs measures vertical parameters typically volts the long vertical bars measure horizontal parameters typically time or frequency See Cursor Readouts on page 3 140 for more information NOTE When cursors measure certain math waveforms the measurement may not be of time frequency or voltage Cursor measurement of those math waveforms that are not of t...

Page 201: ...lected cursor The readouts differ depending on the cursor type you select H Bars V Bars or Paired H Bars The value after D shows the voltage difference between the cursors The value after shows the voltage of the selected cursor relative to ground See Figure 3 67 With the video trigger option you can also display the voltage in IRE units V Bars The value after D shows the time or frequency differe...

Page 202: ...oth cursors are in the same frame Non selected Cursor Dashed Line SelectedCursor Solid Line Cursor Readout H Bars Figure 3 67 H Bars Cursor Menu and Readouts Paired cursors can only show voltage differences when they remain on screen If the paired cursors are moved off screen horizontally the word Edge will replace the voltage values in the cursor readout This procedure and those that follow detai...

Page 203: ...ndent or Track side Independent makes each cursor positionable without regard to the position of the other cursor Track makes both cursors positionable in tandem that is both cursors move in unison and maintain a fixed horizontal or vertical distance between each other 2 Adjust the cursors according to the mode you have selected To adjust either cursor in independent mode use the general purpose k...

Page 204: ...oose vertical bar cursor units do the following step Press CURSOR Time Units main seconds or 1 seconds Hz or with Option 5 Video Line Number side If you are measuring NTSC signals you can choose to display vertical readings in IRE units If you are trying to measure such a signal you should have Option 05 Video Trigger installed as it would be difficult to trigger on composite video waveforms witho...

Page 205: ...e following steps 1 Press the channel selection button of the channel you wish to measure Note the vertical scale factor for the channel in the channel readout on screen 2 Count the graticule divisions between two features to be measured and multiply by the vertical scale factor For example if you count five major vertical graticule divisions between the minimum and maximum values of a waveform at...

Page 206: ...ms TDS 500D and TDS 700D Models Only The TDS Oscilloscope can display histograms constructed from the selected trace waveform data You can display either a vertical or horizontal histogram You can display only one type of histogram at a time See Figure 3 69 Vertical histogram Figure 3 69 Histogram Menu and Vertical Histogram To start histogram counting press MEASURE Histogram pop up Histogram Opti...

Page 207: ...and measurements can continue The histogram box is not turned off If you select Log you display the log of the count in each bin Log scaling provides better visual detail for bins with low count If you select Linear you display the count in each bin To select which waveform is compared against the histogram box press MEASURE Histogram pop up Histogram Options main Histogram Source side Ch1 Ch2 Ch3...

Page 208: ...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 histogram Pk Pk Displays the peak to peak value of the histogram Vertical histograms display the voltage of the highest nonzero bin minus the voltage of the lowest nonzero bin Horizo...

Page 209: ...able 3 12 on page 3 147 The Remove Measrmnt selection provides the same functions as in the Measure menu See Remove Measurements on page 3 130 Mask Testing Option 2C Only The digitizing oscilloscope can perform mask testing You can select a standard mask or create and select a user mask NOTE To function properly masks force some oscilloscope modes and settings to new values To select a mask do the...

Page 210: ...oggle Mask Source side to Ch1 Ch2 Ch3 or Ch4 Mask Source is not available in DPO because all on channels contribute to the mask To turn defined masks on or off press MEASURE Measure main Masks pop up Mask Options main Then toggle Mask Display side ON or OFF To invert a DS1 DS1A DS1C DS2 DS3 E1 Sym E1 Coax E2 E3 STS 1 STM1E or E4 mask press MEASURE Measure main Masks pop up Mask Options main Then t...

Page 211: ...le Std Mask Offset Adj side to ON or OFF To enable the optical reference receiver option 3C and 4C which is required by some optical standards that require a Bessel Thompson response press MEA SURE Measure main Masks pop up Mask Options main Then toggle Filter side to Enable The Filter menu is not available on a TDS 794D To determine the calibration status of the communication filter press SHIFT U...

Page 212: ...s press MEASURE Measure main Masks pop up Mask Counting main Reset Mask Counting side If on mask pass fail testing displays the results of pass fail testing in the Pass Fail Testing side menu To start mask pass fail testing press MEA SURE Measure main Masks pop up Mask Counting main Then toggle Pass Fail Test side to On The Pass Fail Test side menu displays the testing status Passing is displayed ...

Page 213: ... Masks pop up Mask Counting main Then toggle Pass Fail Bell side to Off On Failed or On Completion Off does not ring a bell On Completion rings the bell when the test is complete On Failed rings the bell when a failure is detected and when the test is complete Use the HORIZONTAL POSITION control or the Time Base Position menu to manually align the waveform to a mask Adjusting the HORIZONTAL POSI T...

Page 214: ...play and adding or deleting points as required To move the cursor turn the general purpose knob To change the cursor direction press SELECT 4 To add a point to the mask move the cursor to the location and press Add Point side 5 To delete a point from the mask move the cursor to the point and press Delete Point side 6 To delete all points from the mask press Delete All Points side 7 When you are fi...

Page 215: ...t These points form the bottom of the mask These points form the top of the mask Left mostpoint Right most point Top bottom dividing line not displayed Figure 3 71 Creating a User Mask To create a mask with a concave side create several masks to cover the same area Masks are saved with setups so you can save sets of masks by defining them and then storing the instrument setup Displayed masks are o...

Page 216: ...s DS2 6 312 Mb s FC1063 Optical 1 0625 Gb s 10 Base T Idle IDL Time Details 10 Mb s DS 1 Rate 1 544 Mb s DS3 Full Mask 44 736 Mb s FC133E Electrical 132 7 Mb s 10 Base T Idle IDL Volt Details 10 Mb s DS 3 Rate 44 736 Mb s DS3 Time Details 44 736 Mb s FC266E Electrical 265 6 Mb s 10 Base T Idle IDL Full Mask 10 Mb s E1 Sym Sym Pair 2 048 Mb s DS4NA 139 26 Mb s FC531E Electrical 531 2 Mb s 10 Base T...

Page 217: ...ts you compensate the internal signal path used to acquire the waveforms you measure SPC optimizes the oscilloscope capability to make accurate measurements based on the ambient temperature You should run an SPC if the temperature has changed more than 5 C since the last SPC was performed NOTE When making measurements at volts division settings less than or equal to 5 mV you should run SPC at leas...

Page 218: ...g If such a case occurs rerun signal path compensation 3 Press SHIFT UTILITY System main Cal pop up Signal Path main OK Compensate Signal Paths side 4 Wait for signal path compensation to complete up to 15 minutes While it progresses a clock icon shown at left is displayed on screen When compensation completes the status message will be updated to Pass or Fail in the main menu 5 Verify the word Pa...

Page 219: ...ts probe installed you can optimize the oscillo scope capability to make accurate measurements using that channel and probe Run a Probe Cal anytime you wish to ensure that the measurements you make are made with the most accuracy possible You should also run a Probe Cal if you have changed to a different probe since the last Probe Cal was performed Some Probes Cannot Be Compensated Some types of p...

Page 220: ...e you must first compensate the low frequency response of the probe First do steps 1 and 2 below and then compensate the probe by following the instructions that came with your probe Or see To Compensate Passive Probes on page 3 6 Then continue with step 3 of this procedure 1 Install the probe on the input channel on which it is to be used 2 Power on the digitizing oscilloscope and allow a 20 minu...

Page 221: ...n is Probe Offset Compensation rather than Probe Gain Compensation skip to step 16 9 Connect the probe tip to PROBE COMPENSATION SIGNAL connect the probe ground lead to PROBE COMPENSATION GND 10 Press OK Compensate Gain side 11 Wait for gain compensation to complete one to three minutes When gain compensation completes the following actions occur The clock icon will disappear If offset compensatio...

Page 222: ...ntinue with step 14 otherwise continue with step 19 14 Press SHIFT UTILITY System main Diag Err pop up Error Log main If there are too many error messages to be seen on screen rotate the general purpose knob clockwise to scroll to the last message 15 Note the compensation error amount Skip to step 20 16 Disconnect the probe from any signal you may have connected it to Leave the probe installed on ...

Page 223: ...m an input If you execute a successful Probe Cal on an input channel the oscilloscope stores the compensation data it derived in nonvolatile memory Therefore this data is available when you turn the oscilloscope off and back on and when you change probes When you install a probe or power on the oscilloscope with probes installed the oscilloscope tests the probe at each input Depending on the probe...

Page 224: ...e Calibration data menu See Figure 3 74 If the Re use Probe Calibration data menu is displayed you can choose one of the following options Press OK Use Existing Data side to use the Probe Cal data last stored to compensate the probe Press OK Erase Probe Cal Data side to erase the Probe Cal data last stored and use the probe uncompensated Press CLEAR MENU on the front panel to retain the Probe Cal ...

Page 225: ...zed probe data is retained Yes Power on Can not detect differ ent probe Display Re use Probe Calibration Data menu Cal d Probe Pass Different probe Initialized Different probe Initialized Yes Disconnect Probe Initialized Initialized Yes Connect Probe Can not detect differ ent probe Display Re use Probe Calibration Data menu Cal d Probe Pass Different probe Initialized Different probe Initialized 1...

Page 226: ...pies can be incorporated into documents using desk top publishing software File Utilities for managing copying organizing into directories and so on the setups waveforms and display screens that you save to disk This section ends with details on how to connect your oscilloscope into a system environment so that it can communicate with remote instruments NOTE TDS Oscilloscopes do not come equipped ...

Page 227: ...e setups in setup locations labeled factory without disturbing previously stored setups 2 To store to a setup internally choose one of the ten internal storage locations from the side menu To Setup 1 To Setup 2 see Figure 3 75 Now the current setup is stored in that location Figure 3 75 Save Recall Setup Menu 3 To store a setup to disk press To File side Then use the general purpose knob to select...

Page 228: ...a setup will not change the menu that is currently displayed If you recall a setup that is labeled factory in the side menu you will recall the factory setup The conventional method for recalling the factory setup is described below To reset your oscilloscope to the factory defaults Press SAVE RECALL SETUP Recall Factory Setup main OK Confirm Factory Init side To reset your oscilloscope to the fac...

Page 229: ...general purpose knob to select the exact file from the resulting scrollbar list Only files with APP extensions are displayed Finally press Activate Application side to complete the operation To run file utilities see the Managing the File System on page 3 175 See Example 4 Saving Setups on page 2 28 Saving and Recalling Waveforms and Acquisitions TDS Oscilloscope provides four internal reference m...

Page 230: ...play another waveform without losing the first one To save a waveform do the following steps 1 Select the channel that has the waveform you want to save STOP Before doing step 2 that follows note that if you choose a reference memory location labeled active see Figure 3 76 you will overwrite the waveform that was previously stored there You can store waveforms in reference locations labeled empty ...

Page 231: ...n use the general purpose knob to select the exact file from the resulting scrollbar list Finally press Save To Selected File side to complete the operation NOTE Upon power on the oscilloscope creates the wild card file marked in the file utilities menu by the name TEK WFM and by a wild card icon shown left for storing waveforms Selecting this file in step 3 stores a waveform in a uniquely named s...

Page 232: ...recalling an acquisition stops acquisitions in process To save an image histogram do the following steps 1 Enter a mode where an image data base is generated DPO Histograms and Mask counting you want to save Image Hist is grayed out if DPO is not active 2 To store an image histogram press SAVE RECALL WAVEFORM Image Hist pop up Save Image Histogram main 3 Press To File side Then use the general pur...

Page 233: ...dsheets Excel Lotus 1 2 3 and Quattro Pro If you are writing a MathCad program note that the TDS MathCad file is an ASCII file the first four values of which contain header information The first header value holds the TDS record length The second header value holds time in seconds between samples The third header value holds the trigger position expressed as an index in the data position The fourt...

Page 234: ...e that in Figure 3 77 the main menu items Ref2 Ref3 and Ref4 appear shaded while Ref1 does not References that are empty appear shaded in the More main menu Figure 3 77 More Menu To recall a waveform from disk to an internal reference memory TDS 600B Press SAVE RECALL WAVEFORM Recall Wfm To Ref main Recall From File side TDS 500D or TDS 700D Press SAVE RECALL WAVEFORM Normal pop up Recall Wfm To R...

Page 235: ...n use the general purpose knob to select the exact file from the resulting scrollbar list Only files with IMH extensions are displayed Finally press Recall Image Histo from Selected File side to complete the operation Recalling an image histogram stops acquisitions in process After recalling an image histogram the STATUS menu Recalled Image Histogram displays the vertical and horizontal status whe...

Page 236: ...ion sequence Autosave is not available in DPO mode or if Extended Acquisition is On To run file utilities see the Managing the File System on page 3 175 Managing the File System The TDS Oscilloscope provides file utilities and a floppy disk drive and optional hard disk for saving hardcopies setups and waveforms This section describes how to manage delete rename etc these files using the file syste...

Page 237: ...bring up the Hardcopy menu 3 Press File Utilities in the main menu to bring up the File Utilities side menu See Figure 3 78 NOTE The amount of free space on the active disk is shown in the upper right corner of the display The oscilloscope shows the amount in Kbytes or in Mbytes if the free space is 1 Mbyte or more To convert the amount to bytes you simply multiply the Kbytes amount times 1024 Thu...

Page 238: ...ecursively That means it deletes both the directories and all their contents To rename a file or directory turn the general purpose knob until it scrolls the cursor over the name of the file or directory to delete For example to rename the target file whose default name is set the cursor over its name Then press the side menu Rename button See Figure 3 79 The labeling menu should appear Turn the g...

Page 239: ... is not allowed The Print to side menu should appear Select the port to print to from GPIB RS 232 or Centronics Then the oscilloscope will send the file in its raw form out the port The device printer receiving the file must be capable or printing the particular file format To create a new directory press the side menu Create Directory button The labeling menu should appear Turn the general purpos...

Page 240: ... floppy disk or the optional hard disk turn the general purpose knob until it scrolls the cursor over the line marked with both the name of the drive to format fd0 or hd0 and the disk drive icon pictured at left Then press the side menu Format button To format a Zip drive attach it to a compatible PC and use Iomega tools You can use an Iomega Zip drive to save and recall waveforms and hardcopies W...

Page 241: ...g and Recalling Waveforms and Acquisitions on page 3 168 See Printing a Hardcopy on page 3 180 Printing a Hardcopy The TDS Oscilloscope can provide you with hardcopies of its display To obtain a hardcopy you need to know how to configure the communication and hardcopy parameters of the oscilloscope how to connect it to one of the many hardcopy devices it supports and how to print the hardcopy This...

Page 242: ...ushR H PCX Color PC PaintbrushR H TIFFR Tag Image File Format H BMPR Mono Microsoft Windows file format H BMPR Color Microsoft Windows file format H RLE Color Microsoft Windows color image file format compressed H EPS Mono Image Encapsulated Postscript mono image H EPS Color Image Encapsulated Postscript color image H EPS Mono Plot Encapsulated Postscript mono plot H EPS Color Plot Encapsulated Po...

Page 243: ...haser Color Printers HPGL is compatible with the Tektronix HC100 Plotter and Epson is compatible with the Tektronix HC200 Printer Before you make a hardcopy you need to set up communications and hardcopy parameters Do the following procedures to set up for making hardcopies Set Communications Parameters To set up the communication parameters for a printer attached directly to the oscilloscope GPIB...

Page 244: ...minutes to process and print the screen When using these formats be careful not to inadvertently abort the print by pressing the Hardcopy button for a second print before the oscilloscope has finished processing and transmitting the first one 3 Press SHIFT HARDCOPY MENU Layout main Landscape or Portrait side See Figure 3 81 Landscape Format Portrait Format Figure 3 81 Hardcopy Formats 4 Press SHIF...

Page 245: ...ar on the hardcopies you print To date and time stamp your hardcopy do the following steps 1 Press DISPLAY Settings main Display pop up Readout Options main Display Date and Time side to toggle the setting to On 2 If you want to set the date and time skip steps 3 and 4 and continue with step 1 of Set the Date and Time below Then redo this procedure 3 Press Clear Menu to remove the menu from the di...

Page 246: ...owing steps 1 Press SHIFT UTILITY Config pop up Set Date Time main Year Day Month Hour or Minute side 2 Use the general purpose knob or the keypad to set the parameter you have chosen to the value desired The format when using the keypad is day month For example use 23 6 for the 23rd of June 3 Repeat steps 1 and 2 to set other parameters as desired 4 Press OK Enter Date Time side to put the new se...

Page 247: ...rdcopy device determine which interface and cable the device uses and connect accordingly See Figure 3 83 Oscilloscope GPIB RS 232 or Centronics Cable Hardcopy Device Figure 3 83 Connecting the Oscilloscope Directly to the Hardcopy Device Some devices such as the Tektronix HC100 Plotter use the GPIB interface Many printers such as the Tektronix HC200 use Centronics interfaces Many hardcopy devices...

Page 248: ...n adding a hardcopy fills the spool the message Hardcopy in Process Press HARDCOPY to abort remains displayed You can abort only the last hardcopy sent by pressing the button while the message is still displayed When the printer empties enough of the spool to finish adding the last hardcopy it does so and then removes the message Clear the Spool To remove all hardcopies from the spool press SHIFT ...

Page 249: ...ny hardcopy be output to a disk file The file list and its scrollbar will appear 4 Turn the general purpose knob to place the scroll bar over the file in which to store the hardcopy NOTE Upon power on the oscilloscope creates the wild card file TEK FMT for storing hardcopies where FMT is replaced by the hardcopy format you select Selecting this file and pressing Hardcopy stores a hardcopy in a uni...

Page 250: ...onics port on the controller to print output Oscilloscope GPIB Cable Centronics or RS 232 Cable PC Compatible Hardcopy Device Figure 3 84 Print If your controller is PC compatible and it uses the Tektronix GURU or S3FG210 National Instruments GPIB PCII IIA GPIB package do the following steps to print a hardcopy 1 Use the MS DOS cd command to move to the directory that holds the software that came ...

Page 251: ...ype IBRDF Filename where Filename is a valid DOS file name with which you want to label your hardcopy file It should be 8 characters long and up to a 3 character extension For example you could type ibrdf screen1 6 Exit the IBIC program by typing EXIT 7 Copy the data from your file to your hardcopy device Type COPY Filename Output port B where Filename is the name you defined in step 5 and Output ...

Page 252: ...ote instrument control Bidirectional data transfer Device compatibility Status and event reporting To simplify the development of GPIB systems include instruments that use Tektronix defined codes and formats for messages that travel over the GPIB Each device that follows these codes and formats such as this oscilloscope supports standard commands Use of instruments that support these commands can ...

Page 253: ... GPIB Device Figure 3 85 Typical GPIB Network Configuration Obtain the Proper Interconnect Cabling To connect the oscilloscope to a GPIB network obtain at least one GPIB cable Connecting two GPIB devices requires an IEEE Std 488 1 1987 GPIB cable available from Tektronix part number 012 0991 00 The standard GPIB cable connects to a 24 pin GPIB connector located on the rear panel of the oscilloscop...

Page 254: ...ments just described Then do the following procedures Connect the Oscilloscope to the GPIB To connect the oscilloscope plug an IEEE Std 488 2 1987 GPIB cable into the GPIB connector on the oscilloscope rear panel and into the GPIB port on your controller See Figure 3 87 Oscilloscope Rear Panel Controller GPIB Connector Figure 3 87 Connecting the Oscilloscope to a Controller To Set Up for Remote Op...

Page 255: ...us side See Figure 3 88 Talk Listen Address configures the port for controller based system operation Use the general purpose knob or the keypad to define the address Hardcopy Talk Only configures the port for the hardcopy output without controller supervision Once so configured the oscilloscope will send the hardcopy data to any listeners on the bus when the HARDCOPY button is pressed Pressing HA...

Page 256: ...veforms and Setups TDS 500D TDS 600B TDS 700D User Manual 3 195 GPIB Configuration Menu Figure 3 88 Utility Menu See Printing a Hardcopy on page 3 180 See the TDS Programmer Manual disk To Find More Information ...

Page 257: ...Saving Waveforms and Setups 3 196 TDS 500D TDS 600B TDS 700D User Manual ...

Page 258: ...S Status main 2 Select a status snapshot from the side menu System displays information about the Horizontal Zoom Acquisition Measure and Hardcopy systems See Figure 3 89 This display also tells you the firmware version Display provides parameter information about the display and color systems Trigger displays parameter information about the triggers Waveforms displays information about waveforms ...

Page 259: ...Determining Status and Accessing Help 3 198 TDS 500D TDS 600B TDS 700D User Manual Firmware Version Figure 3 89 Status Menu System ...

Page 260: ...ner To display the banner lists firmware version options copyright and patents Press SHIFT STATUS Banner main See Figure 3 90 Figure 3 90 Banner Display Displaying Help To use the on line help system Press HELP to provide on screen information on any front panel button knob or menu item See Figure 3 91 ...

Page 261: ...xcept HELP or SHIFT turning any knob or pressing any menu item displays help text on the screen that discusses that control The menu selections that were displayed when HELP was first pressed remain on the screen On line help is available for each menu selection displayed at the time the HELP button was first pressed If you are in help mode and want to see help on selections from menus not display...

Page 262: ...displaying the integral of a waveform see page 3 233 NOTE If DPO Extended Acquisition or Masks mode is on the features listed above are not available Limit Testing The TDS Oscilloscope provides limit testing which can automatically compare each incoming or math waveform against a template waveform You set an envelope of limits around a waveform and the oscilloscope finds waveforms that fall outsid...

Page 263: ...m template you will tolerate To do these tasks perform the following steps 1 Press SHIFT ACQUIRE MENU to bring up the Acquire menu 2 Press Create Limit Test Template main Template Source side Ch1 Ch2 Math1 Math2 Math3 Ref1 Ref2 Ref3 or Ref4 side See Figure 3 93 NOTE The template will be smoother if you acquire the template waveform using Average acquisition mode If you are unsure how to select Ave...

Page 264: ...amount by which incoming waveform data can deviate without having exceeded the limits set in the limit test The range is from 0 the incoming waveform must be exactly like the template source to 5 major divisions of tolerance 6 When you have finished specifying the limit test template press OK Store Template side This action stores the specified waveform in the specified destination using the speci...

Page 265: ...e you have selected one of the four channels or a math waveform as a waveform source from the side menu press the same side menu button to select one of the reference memories in which you have stored a template Valid selections are any of the four reference waveforms Ref1 through Ref4 or None Choosing None turns limit testing off for the specified channel or math waveform NOTE Specify the same re...

Page 266: ...o the Limit Test Condition Met menu item in the Stop After main menu You can turn this button on in the Limit Test Setup menu but you cannot turn it off To turn it off press Stop After and specify one of the other choices in the Stop After side menu 3 Ensure that Limit Test side reads ON If it reads OFF press Limit Test side once to toggle it to ON When you set Limit Test to ON the oscilloscope co...

Page 267: ...eform to its own template the position of each waveform template will track that of its waveform If you are comparing two or more waveforms to a common template that template will track the position of the failed waveform If more than one waveform fails during the same acquisition the template will track the position of the waveform in the highest numbered channel For example CH 2 is higher than C...

Page 268: ...s MORE Math1 Math2 or Math3 main Change Math waveform definition side Single Wfm Math main 2 To define the source waveform press Set Single Source to side repeatedly to cycle it to the desired channel or reference waveform Figure 3 94 More Menu 3 Press Set Function to side repeatedly to cycle it to inv invert intg or diff Waveform integration intg is described on page 3 233 and waveform differenti...

Page 269: ...eated ly to cycle it to the desired channel or reference waveform 3 To define the second source waveform press Set 2nd Source to side repeatedly to cycle it to the desired channel or reference waveform 4 To enter the math operator press Set operator to side repeatedly to cycle it through the choices Supported operators are and NOTE If you select for multiply in step 4 the cursor feature will measu...

Page 270: ... performed on only one acquisition Fast Fourier Transforms The Advanced DSP Math capabilities of the TDS Oscilloscope include taking the Fast Fourier Transform FFT of a waveform This section describes FFTs and how to set up the oscilloscope to display and measure FFTs The FFT allows you to transform a waveform from a display of its amplitude against time to one that plots the amplitudes of the var...

Page 271: ...quencies the waveform contains with respect to those frequencies For example Figure 3 96 shows the untransformed impulse response of a system in channel 2 at the top of the screen The FFT transformed magnitude and phase appear in the two math waveforms below the impulse The horizontal scale for FFT math waveforms is always expressed in frequency per division with the beginning left most point of t...

Page 272: ...l 2 Adjust the vertical and horizontal scales and trigger the display or press AUTOSET The topic Offset Position and Scale on page 3 219 provides in depth information about optimizing your setup for FFT displays 3 Press MORE to access the menu for turning on math waveforms 4 Select a math waveform Your choices are Math1 Math2 and Math3 main 5 If the selected math waveform is not FFT press Change M...

Page 273: ... is displayed using log scale expressed in dB relative to 1 VRMS where 0 dB 1 VRMS Linear RMS Magnitude is displayed using voltage as the scale Phase deg Phase is displayed using degrees as the scale where degrees wrap from 180 to 180 Phase rad Phase is displayed using radians as the scale where radians wrap from p to p The topic Considerations for Phase Displays on page 3 222 provides in depth in...

Page 274: ...de accuracy but degraded for resolving frequencies Blackman Harris Best window for measuring the amplitude of frequencies but worst at resolving frequencies The topic Selecting a Window on page 3 225 provides in depth information on choosing the right window for your application 9 If you did not select Phase deg or Phase rad in step 7 skip to step 12 Phase suppression is only used to reduce noise ...

Page 275: ...purpose knob to align the selected cursor solid line to the top or to any amplitude on the waveform you choose 4 Press SELECT to select the other cursor Use the general purpose knob to align the selected cursor to the bottom or to any amplitude on the waveform you choose 5 Read the amplitude between the two cursors from the readout Read the amplitude of the selected cursor relative to either 1 VRM...

Page 276: ... display The cursor units will be in dB or volts for FFTs measuring magnitude and in degrees or radians for those FFTs measuring phase The cursor unit depends on the selection made for Set FFT Vert Scale to side See step 7 on page 3 212 for more information Figure 3 99 Cursor Measurement of an FFT Waveform 6 Press V Bars side Use the general purpose knob to align one of the two vertical cursors to...

Page 277: ...between the long horizontal bars of both paired cursors from the bottom readout You can use automated measurements to measure FFT math waveforms Use the procedure To Take Automated Measurements found in Waveform Differentiation on page 3 230 There are several characteristics of FFTs that affect how they are displayed and should be interpreted Read this topic to learn about the FFT frequency domain...

Page 278: ...tal signal processing converts data from the FFT time domain record into a frequency domain record Figure 3 100 compares the waveform record to the FFT time domain record Note the following relationships For waveform records 10 K points in length the FFT uses all of the waveform record as input For waveform records 10 K points the first 10 K points of the waveform record becomes the FFT time domai...

Page 279: ...n on an FFT waveform the oscilloscope displays either the magnitude or phase angle of the FFT frequency domain record The resolution between the discrete frequencies displayed in this waveform is determined by the following equation F Sample Rate FFT Length Where DF is the frequency resolution Sample Rate is the sample rate of the source waveform FFT Length is the length of the FFT Time Domain wav...

Page 280: ...rm except at DC DC correction is discussed below Adjust Offset and Position to Zero for DC Correction Normally the output of a standard FFT computation yields a DC value that is twice as large as it should be with respect to the other frequencies Also the selection of window type introduces errors in the DC value of an FFT The displayed output of the FFT on TDS oscilloscopes is corrected for these...

Page 281: ...veraging does affect the frequency response of the source waveform For TDS 500D and TDS 700D models only after the FFT is set up and displayed you can to turn on Hi Res mode to reduce the effect of noise in the signal Hi Res operates on both repetitive and nonrepetitive waveforms however it does affect the frequency response of the source waveform Peak Detect and Envelope Add Distortion Peak Detec...

Page 282: ...nterpolation by switching between sin x x and linear interpolation and observing the difference in measurement results on the display If significant differences occur use linear interpolation Aliasing occurs when the oscilloscope acquires a source waveform with frequency components outside of the frequency range for the current sample rate In the FFT waveform the actual higher frequency components...

Page 283: ...Point Frequency Amplitude Actual Frequencies Aliased Frequencies Figure 3 102 How Aliased Frequencies Appear in an FFT When you set up an FFT math waveform to display the phase angle of the frequencies contained in a waveform you should take into account the reference point the phase is measured against You may also need to use phase suppression to reduce noise in your FFTs Establish a Zero Phase ...

Page 284: ...if the phase reference waveform has slow enough edges When impulse testing and measuring phase align the impulse input into the system to the zero reference point of the FFT time domain waveform Set the trigger position to 50 and horizontal position to 50 for all record lengths less than 15 K For records with a 100 K length set the trigger position to 5 Use the horizontal position knob to move the...

Page 285: ...Mode main Independent side Func tion main H Bars side Use the general purpose knob to align the selected cursor to a level that places the tops of the magnitudes of frequen cies of interest above the cursor but places other magnitudes completely below the cursor 3 Read the level in dB from the readout Note the level for use in step 5 4 Press MORE main Change Waveform Definition menu side Press Set...

Page 286: ...he amplitude of those frequencies FFT Time Domain Record FFT Time Domain Record After Windowing FFT Window FFT Frequency Domain Record FFT Xs Figure 3 103 Windowing the FFT Time Domain Record Selecting a Window You can select your window to provide better frequency resolution at the expense of better amplitude measurement accuracy in your FFT better amplitude accuracy over frequency resolution or ...

Page 287: ...til the frequencies merge Use the window just before the window that lets the frequencies merge for best compro mise between resolution and amplitude accuracy NOTE If the Hanning window merges the frequencies try the Hamming window before settling on the rectangular window Depending on the distance of the frequencies you are trying to measure from the fundamental the Hamming window sometimes resol...

Page 288: ...ts it generally gives the best frequency resolution because it results in the most narrow lobe width in the FFT output record If the time domain records you measured always had an integer number of cycles you would only need this window Hamming Hanning and Blackman Harris are all somewhat bell shaped widows that taper the waveform record at the record ends The Hanning and Blackman Harris windows t...

Page 289: ...Math capabilities of the TDS Oscilloscope include waveform differentiation This capability allows you to display a derivative math waveform that indicates the instantaneous rate of change of the waveform acquired This section describes how to setup the oscilloscope to display and measure derivative math waveforms Derivative waveforms are used in the measurement of slew rate of amplifiers and in ed...

Page 290: ...rm to the desired channel input and select that channel 2 Adjust the vertical and horizontal scales and trigger the display or press AUTOSET 3 Press MORE Math1 Math2 or Math3 main Change Math Definition side Single Wfm Math main See Figure 3 105 4 Press Set Single Source to side Repeatedly press the same button or use the general purpose knob until the channel source selected in step 1 appears in ...

Page 291: ...ated math waveform is selected in the More main menu 2 TDS 600B Press MEASURE Select Measrmnt main 3 TDS 500D and TDS 700D Press MEASURE Measure pop up Select Measrmnt main 4 Select up to four measurements in the side menu See Figure 3 106 You can also use cursors to measure derivative waveforms Use the same procedure as is found under To Take Cursor Measurements on page 3 235 When using that proc...

Page 292: ...nd position the source waveform so it is contained on screen Off screen waveforms may be clipped resulting in errors in the derivative waveform You can use vertical position and vertical offset to position your source waveform The vertical position and vertical offset will not affect your derivative waveform unless you position the source waveform off screen so it is clipped When using the vertica...

Page 293: ...either of the following methods to eliminate clipping Reduce the size of the source waveform on screen Select the source channel and use the vertical SCALE knob Expand the waveform horizontally on screen Select the source channel and increase the horizontal scale using the horizontal SCALE knob For instance if you display the source waveform illustrated in Figure 3 105 on page 3 230 so its rising ...

Page 294: ...tegral waveforms find use in the following applications Measuring of power and energy such as in switching power supplies Characterizing mechanical transducers as when integrating the output of an accelerometer to obtain velocity The integral math waveform derived from the sampled waveform is computed based on the following equation y n scale n i 1 x i x i 1 2 T Where x i is the source waveform y ...

Page 295: ...waveform definition side Single Wfm Math main 4 Press Set Single Source to side Repeatedly press the same button until the channel source selected in step 1 appears in the menu label 5 Press Set Function to side Repeatedly press the same button until intg appears in the menu label 6 Press OK Create Math Waveform side to turn on the integral math waveform You should now have your integral math wave...

Page 296: ...Press CURSOR Mode main Independent side Func tion main H Bars side 3 Use the general purpose knob to align the selected cursor solid to the top or to any amplitude level you choose 4 Press SELECT to select the other cursor 5 Use the general purpose knob to align the selected cursor to the bottom or to any amplitude level you choose 6 Read the integrated voltage over time between the cursors in vol...

Page 297: ... horizon tal axis of the waveform 8 Press SELECT to select the alternate cursor 9 Align the alternate cursor to another point of interest on the math waveform 10 Read the time difference between the cursors from the readout Read the time difference between the selected cursor and the trigger point for the source waveform from the readout 11 Press Function main Paired side 12 Use the technique just...

Page 298: ... integrated math waveforms from live channel waveforms consider the following topics Note the following requirements for obtaining a good display You should scale and position the source waveform so it is contained on screen Off screen waveforms may be clipped which will result in errors in the integral waveform You can use vertical position and vertical offset to position your source waveform The...

Page 299: ...scope input Once you have your waveform optimally displayed you may magnify or reduce it vertically and horizontally to inspect any feature you desire Just be sure the integrated waveform is the selected waveform Press MORE then select the integrated waveform in the More main menu Then use the Vertical and Horizontal SCALE knobs to adjust the math waveform size If you want to see the zoom factor 2...

Page 300: ...Appendices ...

Page 301: ...occur when a video signal generates a horizontal or vertical sync pulse These tools allow investigation of a range of NTSC PAL SECAM and high definition TV signals Option is not available on the TDS 794D 13 RS 232 Centronics Hard copy Interface Ports Add RS 232 C and Centronics interface ports Option applies to TDS 500D only 1G 1 GS s maximum Limit sample rate to 1 GS s maximum Option applies to T...

Page 302: ...DS 784D TDS 794D To 2 M samples on three or four channels 4 M on two channels and 8 M samples on one channel Option includes a hard disk and is only available for the models listed above 1R Rackmount Oscilloscope comes configured for installation in a 19 inch wide instrument rack For later field conversions order kit 016 1236 00 2C Communication Signal Analyzer Oscilloscope comes configured for co...

Page 303: ...5 GHz P6245 active probe Option applies only to TDS 784D and TDS 580D 2D Two probes Delete two standard probes normally shipped with the oscilloscope Option applies only to TDS 520D and TDS 620B models 2F Advanced DSP math Add advanced DSP math features such as FFT integration and differentiation Option applies only to TDS 500D models 4D Four probes Delete the four standard probes shipped with the...

Page 304: ...ference Performance Verification and Specifications 071 0135 XX Probes TDS 754D Four P6139A 10X 500 MHz Passive probes TDS 644B Four P6243 probes TDS 620B Two P6139A probes TDS 540D Four P6139A 10X 500 MHz Passive probes TDS 520D and TDS 724D Two P6139A 10X 500 MHz Passive probes TDS 580D TDS 680B TDS 684B TDS 784D TDS 794D No probes standard P6139A P6243 P6139A P6139A P6139A Front Cover 200 3696 ...

Page 305: ... Optional accessories Accessory Part number Service Manual 071 0136 XX Oscilloscope Cart K420 Rack Mount Kit for field conversion 016 1236 00 Accessory Pouch TDS 500D TDS 620B TDS 680B 016 1268 00 Soft Sided Carrying Case 016 0909 01 Transit Case 016 1135 00 GPIB Cable 1 meter 012 0991 01 GPIB Cable 2 meter 012 0991 00 Centronics Cable 012 1214 00 RS 232 Cable 012 1298 00 ...

Page 306: ...3 P6245 P6243 P6245 P6243 P6245 P6245 All Technology P6245 P6217 P6245 P6217 P6245 P6217 P6245 P6217 P6245 P6217 P6245 P6217 P6245 P6217 Logic P6408 P6408 P6408 P6408 P6408 P6408 Differential Digital Telecom P6246 P6247 P6247 P6246 P6247 P6247 P6246 P6247 P6247 P6247 Micro Volt ADA400A ADA400A ADA400A ADA400A ADA400A ADA400A High Voltage P5205 P5210 P5205 P5210 P5205 P5210 P5205 P5210 P5205 P5210 ...

Page 307: ...oltage probe FET DC to 1 0 GHz P6245 Active high speed digital voltage probe FET DC to 1 5 GHz P6246 Active high bandwidth differential probe FET DC to 400 MHz P6247 Active high bandwidth differential probe FET DC to 1 GHz P6101B 1X 15 MHz Passive probe P6158 3 0 GHz 20x 1 KW low capacitance probe P6139A 10X 500 MHz Passive probe P6339A 500 MHz buffered passive AC DC coupling 20 150 MHz bandwidth ...

Page 308: ...100 A Current measurement system AC DC Supplied with A6303 Current Probe AM 503S Option 05 DC AC 100 MHz Current measurement system Supplied with A6312 Current Probe TCP 202 Current Probe DC to 50 Mhz 15 A DC P6021 AC Current probe 120 Hz to 60 MHz P6022 AC Current probe 935 kHz to 120 MHz CT 1 Current probe designed for permanent or semi permanent in circuit installation 25 kHz to 1 GHz 50 W inpu...

Page 309: ...oftware Part number Wavewriter AWG and waveform creation S3FT400 WaveStar Waveform capture and documentation WSTR31 WaveStar 98 Waveform capture and documentation Windows 95 version WSTR98 Telecommunication Package and i Pattern Software TTiP Check for the full warranty statements for this product and the products listed above on the first page after the title page of each product manual Accessory...

Page 310: ...Appendix A Options and Accessories A 10 TDS 500D TDS 600B TDS 700D User Manual ...

Page 311: ...s percentages with representing 100 is the value used as the 0 level in measurements such as fall time and rise time The exact meaning of and depends on which of two calculation methods you choose from the High Low Setup item of the Measure menu These are Min max and Histogram Min Max Method defines the 0 and the 100 waveform levels as the lowest amplitude most negative and the highest amplitude m...

Page 312: ...he most points in the lower histogram is the value Choose the levels where the histograms peak for and If gives the largest peak value within the upper or lower histogram then return the value for both and this is probably a very low amplitude waveform If more than one histogram level bin has the maximum value choose the bin farthest from This algorithm does not work well for two level waveforms w...

Page 313: ... samples unless you are making a gated measurement When you use gated measurements it is the location of the left vertical cursor End is the location of the end of the measurement zone X value It is 1 0 samples unless you are making a gated measurement When you use gated measurements it is the location of the right vertical cursor Hysteresis The hysteresis band is 10 of the waveform amplitude It i...

Page 314: ...dRef Hysteresis x Amplitude MidRef Hysteresis x Amplitude MidRef MCross1 StartCycle MCross2 MCross3 EndCycle Figure B 1 MCross Calculations The oscilloscope calculates these values as follows 1 Find the first in the waveform record or the gated region This is 2 Continuing from find the next in the waveform record or the gated region of the opposite polarity of This is 3 Continuing from find the ne...

Page 315: ...orm 0 0 RecordLength 1 0 holds the acquired data TPOS is the location of the sample just before the trigger point the time reference zero sample In other terms it contains the domain reference location This location is where time 0 TSOFF is the offset between and the actual trigger point In other words it is the trigger sample offset Values range between 0 0 and 1 0 samples This value is determine...

Page 316: ...le For cyclical data you may prefer to use the cycle area rather than the arithmetic area if then return the interpolated value at Otherwise dt For details of the integration algorithm see page B 15 Amplitude voltage measurement The area over one waveform cycle For data not cyclical you might prefer to use the Area measurement If then return the interpolated value at dt For details of the integrat...

Page 317: ...ferent value from 3 Compute Amplitude voltage measurement The mean over one waveform cycle For non cyclical data you might prefer to use the Mean measurement If then return the interpolated value at ŕ dt For details of the integration algorithm see page B 15 The true Root Mean Square voltage over one cycle If then Otherwise ŕ 2dt Ǹ For details of the integration algorithm see page B 15 Burst Width...

Page 318: ...lem exists The optical probe and the oscilloscope must be calibrated All inputs are micro watts and are not negative Extinction ratio is dimensionless Extinction Ratio High Low Low 1 mW Optical measurement Extinction 100 0 Extinction Ratio Optical measurement Extinction dB is typically 8 to 12 db To exceed this range the input may be from nonoptical probes or noncommunication lasers Extinction dB ...

Page 319: ... of Update if subsequent crossings are found When a crossing is found it becomes Use linear interpolation if necessary 4 Timing measurement The reciprocal of the period Measured in Hertz Hz where 1 Hz 1 cycle per second If 0 or is otherwise bad return an error 1 100 highest voltage reference value See High Low on page B 1 Using the min max measurement technique Frequency High ...

Page 320: ...hat one waveform is not necessarily equal to one cycle For cyclical data you may prefer to use the cycle mean rather than the arithmetic mean If then return the interpolated value at Otherwise ŕ dt For details of the integration algorithm see page B 15 The normalized mean If the waveform source is from an optical probe this can give average optical power Mean dBm Amplitude voltage measurement The ...

Page 321: ...gativeOvershoot Low Min Amplitude 100 Note that this value should never be negative unless High or Low are set out of range Timing measurement The distance time between MidRef default 50 amplitude points of a negative pulse If MCross1Polarity then NegativeWidth MCross2 MCross1 else NegativeWidth MCross3 MCross2 Waveform Start See Mean dBm on page B 10 Amplitude measurement The absolute difference ...

Page 322: ...ement that is it is measured from a target waveform to a reference waveform To get a specific phase measurement you must specify the target and reference sources Phase is determined in the following manner 1 The first and third in the source target waveform are found 2 The period of the target waveform is calculated see Period above 3 The first in the reference waveform crossing in the same direct...

Page 323: ... amplitude points of a positive pulse If MCross1Polarity then PositiveWidth MCross2 MCross1 else PositiveWidth MCross3 MCross2 Timing measurement Time taken for the leading edge of a pulse to rise from a LowRef value default 10 to a HighRef value default 90 Figure B 3 shows a rising edge with the two crossings necessary to calculate a Rise Time measurement 1 Searching from Start to End find the fi...

Page 324: ...ings are found If a crossing is found it becomes the high rise time or Use linear interpolation if necessary 4 High HighRef LowRef Low THR TLR Rise Time Figure B 3 Rise Time Amplitude voltage measurement The true Root Mean Square voltage If then the interpolated value at Otherwise ŕ Ă 2dt Ǹ For details of the integration algorithm see below RMS ...

Page 325: ... A and B are numbers between 0 0 and 1 0 If A and B are integers then ŕ B A W t dt s ȍ B 1 i A W i W i 1 2 where s is the sample interval Similarly ŕ B A W t 2 dt is approximated by ŕ B A ǒW t Ǔ 2 dt where W t is the sampled waveform is the continuous function obtained by linear interpolation of W t A and B are numbers between 0 0 and 1 0 If A and B are integers then ŕ B A ǒW t Ǔ 2 dt s ȍ B 1 i A ...

Page 326: ...ontain so many apparent crossings Unless otherwise noted envelope waveforms use either the minima or the maxima but not both determined in the following manner 1 Step through the waveform from to until the sample min and max pair DO NOT straddle MidRef Both min and max samples are above MidRef so use minima MidRef Both min and max samples are below MidRef so use maxima Figure B 4 Choosing Minima o...

Page 327: ...wn sample When samples are out of range the measurement will give a warning to that effect for example CLIPPING if the measurement could change by extending the measurement range slightly The algorithms assume the samples recover from an overdrive condition instantaneously For example if is set directly then would not change even if samples were out of range However if was chosen using the choice ...

Page 328: ...Appendix B Algorithms B 18 TDS 500D TDS 600B TDS 700D User Manual ...

Page 329: ...office for repair attach a tag to the oscilloscope showing the instrument owner and address the name of the person to contact about the instrument the instrument type and the serial number 3 Wrap the oscilloscope with polyethylene sheeting or equivalent material to protect the finish 4 Cushion the oscilloscope in the shipping carton by tightly packing dunnage or urethane foam on all sides between ...

Page 330: ...Appendix C Packaging for Shipment C 2 TDS 500D TDS 600B TDS 700D User Manual ...

Page 331: ...0B TDS 684B TDS 784D and TDS 794D oscilloscopes ship without probes Tektronix recommends you order and use the P6245 P6217 or P6158 probes These probes take advantage of the higher bandwidth of these these models Passive Voltage Probes Passive voltage probes measure voltage They employ passive circuit compo nents such as resistors capacitors and inductors There are three common classes of passive ...

Page 332: ...tance is much lower than high Z passive probes typically 1 pF but input resistance is also lower 500 to 5000 typically Although that DC loading degrades amplitude accuracy the lower input capacitance reduces high frequency loading to the circuit under test That makes ZO probes ideal for timing and phase measurements when amplitude accuracy is not a major concern ZO probes are useful for measuremen...

Page 333: ...process signals from the circuit under test All active probes require a source of power for their operation Power is obtained either from an external power supply or from the oscilloscope itself NOTE When you connect an active probe to the oscilloscope such as the P6245 the input impedance of the oscilloscope automatically becomes 50 If you then connect a passive probe you need to set the input im...

Page 334: ...s SMD a hand held probe is too big to be practical You can instead use fixtured or probe card mounted active probes or buffered amplifiers to precisely connect your instrument to your device under test These probes have the same electrical characteristics as high speed active probes but use a smaller mechanical design Current Probes Current probes enable you to directly observe and measure current...

Page 335: ...rential measurements by measuring the results of two opposing currents in two conductors in the jaws of the probe Figure D 2 A6303 Current Probe Used in the AM 503S Opt 03 NOTE Attempting to measure more than 40 amperes of total in phase current DC peak AC using three or more TCP202 current probes installed on the input channels can result in measurement or display errors Optical Probes Optical pr...

Page 336: ...s LANs fiber based systems based on the FDDI SONET and Fiber Channel standards optical disk devices digital video and high speed fiber optic communications systems NOTE When you connect any probe with a TEKPROBE level 2 interface to the oscilloscope the input impedance of the oscilloscope automatically becomes 50 If you then connect a high input impedance passive probe you need to set the input im...

Page 337: ...g or transporting the oscilloscope Inspect and clean the oscilloscope exterior as often as operating conditions require Send the oscilloscope in for service if it requires an interior cleaning The collection of dirt on components inside can cause them to overheat and breakdown Dirt acts as an insulating blanket preventing efficient heat dissipa tion Dirt also provides an electrical conduction path...

Page 338: ...ssing damaged or loose knobs Send in for service Carrying handle bail cabinet feet Correct operation Send in for service Cleaning Procedure Exterior To clean the oscilloscope exterior do the following steps 1 Remove loose dust on the outside of the oscilloscope with a lint free cloth 2 Remove remaining dirt with a lint free cloth dampened in a general purpose detergent and water solution Do not us...

Page 339: ...ws TDS Family Programmer Figure F 1 Equipment Needed to Run the Example Programs Loading the Programs For instructions on installing the programmer manual and the other software on the TDS Family Programmer Manual disk read the readme file on the disk Running the Help Program To run the programmer manual help file using Windows 3 1 perform the following 1 Double click on the TDS Family Programmer ...

Page 340: ...Appendix F Programmer Disk F 2 TDS 500D TDS 600B TDS 700D User Manual ...

Page 341: ...Glossary ...

Page 342: ...nto a waveform record The waveform record is stored in memory The trigger marks time zero in that process Acquisition interval The time duration of the waveform record divided by the record length The oscilloscope displays one data point for every acquisition interval Active cursor The cursor that moves when you turn the general purpose knob It is represented in the display by a solid line The rea...

Page 343: ...cally acquire if triggerable events are not detected within a specified time period Autoset A function of the oscilloscope 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 Averag...

Page 344: ... vertical systems several different ways Cursors Paired markers that you can use to make measurements between two waveform locations The oscilloscope displays the values expressed in volts or time of the position of the active cursor and the distance between the two cursors Cycle area A measurement of waveform area taken over one cycle Expressed in volt seconds Area above ground is positive area b...

Page 345: ...the source passing through a specified voltage level in a specified direction the trigger slope Envelope acquisition mode A mode in which the oscilloscope acquires and displays a waveform that shows the variation extremes of several acquisitions Equivalent time sampling ET TDS 500D and TDS 700D Models Only A sampling mode in which the oscilloscope acquires signals over many repetitions of the even...

Page 346: ...curs if the oscilloscope detects negative spike widths less than the specified glitch time Glitch either trigger Triggering occurs if the oscilloscope detects either positive or negative spike widths less than the specified glitch time GPIB General Purpose Interface Bus An interconnection bus and protocol that allows you to connect multiple instruments in a network under the control of a controlle...

Page 347: ...al that elapses before the trigger circuit will accept another trigger signal Trigger holdoff helps ensure a stable display Horizontal bar cursors The two horizontal bars that you position to measure the voltage parameters of a waveform The oscilloscope displays the value of the active moveable cursor with respect to ground and the voltage value between the bars Interpolation The way the oscillosc...

Page 348: ...cope triggers depending on the combinatorial logic condition of channels 1 2 3 and 4 Allowable conditions are AND OR NAND and NOR Low The value used as 0 in automated measurements whenever high ref mid ref and low ref values are needed as in fall time and rise time measure ments May be calculated using either the min max or the histogram method With the min max method most useful for general wavef...

Page 349: ... Amplitude voltage measurement NegativeOvershoot Low Min Amplitude 100 Negative width A timing measurement of the distance time between two amplitude points falling edge MidRef default 50 and rising edge MidRef default 50 on a negative pulse Normal trigger mode A mode on which the oscilloscope does not acquire a waveform record unless a valid trigger event occurs It waits for a valid trigger event...

Page 350: ...A timing measurement between two waveforms of the amount one leads or lags the other in time Phase is expressed in degrees where 360 comprise one complete cycle of one of the waveforms Waveforms measured should be of the same frequency or one waveform should be a harmonic of the other Pixel A visible point on the display The oscilloscope display is 640 pixels wide by 480 pixels high Pop up Menu A ...

Page 351: ... digital value Probe compensation Adjustment that improves low frequency response of a probe Pulse trigger A trigger mode in which triggering occurs if the oscilloscope finds a pulse of the specified polarity with a width between or optionally outside the user specified lower and upper time limits Real time sampling A sampling mode where the oscilloscope samples fast enough to completely fill a wa...

Page 352: ... 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 so that it can be quantized Two general methods of sampling are real time sampling and equivalent time sampli...

Page 353: ... horizontal quantity The two values are rising and falling Tek Secure This feature erases all waveform and setup memory locations setup memories are replaced with the factory setup Then it checks each location to verify erasure This feature finds use where this oscilloscope is used to gather security sensitive data such as is done for research or development projects Time base The set of parameter...

Page 354: ...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 intensity is modulated by the CH 3 Z waveform record YT format The conventional oscilloscope display format It shows the voltage of a wav...

Page 355: ...Glossary Glossary 14 TDS 500D TDS 600B TDS 700D User Manual ...

Page 356: ...Index ...

Page 357: ...fter 3 37 3 205 Stop After Limit Test Condition Met 3 205 Template Source 3 202 V Limit 3 203 ACQUIRE MENU button 3 35 3 202 Acquiring and Displaying Waveforms 3 5 Acquisition 3 27 Glossary 1 Interval Glossary 1 Mode envelope 3 32 Modes Average 3 32 3 71 Envelope 3 71 Hi Res 3 34 HiRes 3 71 Peak detect 3 32 Sample 3 32 Readout 3 35 Acquisition length Option 2M 3 2 Acquisition mode Choosing an 3 27...

Page 358: ... 3 173 3 207 FB ON STBY F 2 3 ON STBY 1 7 Save Recall SETUP 2 10 3 12 3 166 3 175 3 176 Save Recall WAVEFORM 3 169 3 175 3 176 SELECT 3 142 Glossary 11 SET LEVEL TO 50 3 79 SINGLE TRIG 3 39 3 80 STATUS 3 197 TRIGGER MENU 3 82 3 83 3 91 3 95 3 96 3 101 3 103 3 107 UTILITY 3 157 3 182 3 194 VERTICAL MENU 2 19 WAVEFORM OFF 2 21 3 14 3 46 3 64 ZOOM 3 53 3 54 Buttons CH1 CH2 3 13 Channel selection 2 17...

Page 359: ...1 to Acquire menu 3 204 Compare Ch2 to Acquire menu 3 204 Compare Ch3 to Acquire menu 3 204 Compare Ch4 to Acquire menu 3 204 Compare Math1 to Acquire menu 3 204 Compare Math2 to Acquire menu 3 204 Compare Math3 to Acquire menu 3 204 Compensation of passive probes 3 6 Configure Utility menu 3 182 3 194 Confirm Delete File Utilities menu 3 178 Connector FB AUX TRIGGER INPUT F 2 5 Centronics 2 5 FB ...

Page 360: ...3 117 3 124 How to set up 3 118 Delayed Trigger menu 3 119 3 124 Ch1 Ch2 3 122 Coupling 3 122 Delay by 3 121 Delay by Events 3 121 Delay by Time 3 121 Falling edge 3 122 Level 3 123 Rising edge 3 122 Set to 50 3 123 Set to ECL 3 123 Set to TTL 3 123 Slope 3 122 Source 3 122 FB DELAYED TRIGGER OUTPUT F BNC 2 5 Delayed Triggerable 3 78 Delayed Triggerable Horizontal menu 3 24 3 121 Delete Refs Save ...

Page 361: ...ope Incompatible with DPO 3 66 Envelope acquisition mode 3 32 3 71 Glossary 4 Envelope Acquire menu 3 35 EPS Color Img Hardcopy menu 3 183 EPS Color Plt Hardcopy menu 3 183 EPS Mono Img Hardcopy menu 3 183 EPS Mono Plt Hardcopy menu 3 183 Epson 3 181 Epson Hardcopy menu 3 183 Equivalent time sampling 3 29 3 71 Equivalent time sampling random Glossary 4 Extended acquisition length 3 24 Displaying a...

Page 362: ...ce probes C 1 General purpose knob 2 7 2 25 Glossary 5 Glitch trigger 3 99 3 100 Glossary 5 How to set up 3 101 Glitch Main Trigger menu 3 103 Goes FALSE Main Trigger menu 3 93 3 95 Goes TRUE Main Trigger menu 3 93 3 95 GPIB 2 5 3 191 3 196 Glossary 5 Connecting to 3 193 Interconnect cabling 3 192 Interface requirements 3 191 Procedures for using 3 193 Protocols 3 191 Selecting and configuring the...

Page 363: ...ontal menu 3 118 Delayed Only 3 118 Delayed Runs After Main 3 24 3 118 Delayed Scale 3 23 Delayed Triggerable 3 24 3 121 Extended acquisition length 3 24 FastFrame 3 68 FastFrame Setup 3 68 Fit to screen 3 23 Frame Count 3 68 Frame Length 3 68 Frame 3 69 Horiz Pos 3 23 Horiz Scale 3 23 Intensified 3 119 3 121 Main Scale 3 23 Record Length 3 22 Set to 10 3 23 Set to 50 3 23 Set to 90 3 23 Time Base...

Page 364: ...erpolation Display menu 3 44 Logic trigger 3 75 3 88 Definitions 3 88 Pattern 3 87 Glossary 7 Readout 3 89 State 3 88 Glossary 7 Logic triggering 3 86 Logic Main Trigger menu 3 82 Low 3 127 Glossary 7 Low impedance Zo probes C 2 Low Ref Measure menu 3 133 Lubrication D 2 M Main menu Glossary 7 Main menu buttons 2 3 Glossary 7 Main Scale Horizontal menu 3 23 Main Trigger Menu Falling edge 3 86 Risi...

Page 365: ...52 Maximum 3 127 Glossary 7 Mean 3 127 3 147 Glossary 8 Mean 1 StdDev 3 147 Mean 2 StdDev 3 147 Mean 3 StdDev 3 147 Mean dBm 3 128 A 10 MEASURE button 3 129 3 148 Measure Delay menu Create Measrmnt 3 135 Delay To 3 134 Edges 3 135 Measure Delay To 3 134 OK Create Measurement 3 135 Measure Delay To Measure Delay menu 3 134 Measure menu 3 129 3 136 Gating 3 131 High Ref 3 133 High Low Setup 3 132 Hi...

Page 366: ...p 2 8 Glossary 9 Save Recall 3 166 Save Recall Acquisition 3 171 3 174 Save Recall Image Histogram 3 171 Save Recall Waveform 3 169 Setup 2 10 3 12 Status 3 197 Utility 3 182 Mid Ref Measure menu 3 133 Mid2 Ref Measure menu 3 133 Min Max Measure menu 3 132 Minimum 3 127 Glossary 8 Mode Holdoff Main Trigger menu 3 85 Model number location 2 3 Models Manual references to xii Models key features and ...

Page 367: ...05 Active Probe 1 5 P6701A B with calibration 3 2 P6703A B with calibration 3 2 Packaging B 1 Paired cursor 3 139 PAL Display menu 3 45 Palette Color menu 3 48 Palette Hardcopy menu 3 183 Pass Fail Testing Masks 3 151 Passive voltage probes C 1 Pattern trigger 3 86 How to setup 3 91 PCX 3 181 PCX Color Hardcopy menu 3 183 PCX Hardcopy menu 3 183 Peak detect acquisition mode 3 32 Glossary 9 Peak De...

Page 368: ... 3 82 General purpose knob 2 6 Logic trigger 3 89 Measurement 3 128 3 129 Record view 2 6 Snapshot 3 135 Time base 2 6 Trigger 2 6 3 81 Trigger Level Bar 3 42 Trigger Point 3 42 Readout Cursor Paired 3 230 Readout cursor H Bars 3 214 3 230 3 235 Paired cursors 3 216 3 237 V Bars 3 216 3 230 3 236 Readout Display menu 3 43 3 45 Real time sampling 3 28 Real time sampling Glossary 10 Rear panel 2 5 R...

Page 369: ... menu 3 171 Save Current Setup Save Recall Setup menu 3 166 Save Format Save Recall Waveform menu 3 172 Save Image Histogram Save Recall Waveform menu 3 171 Save Waveform Save Recall Waveform menu 3 169 Save Recall Acquisition menu 3 171 3 174 Save Recall Image Histogram menu 3 171 Save Recall SETUP button 2 10 3 12 3 166 3 175 3 176 Save Recall Setup menu 3 166 factory status 3 166 File Utilities...

Page 370: ... 3 99 Glossary 11 Glossary 12 600 ps limitation 3 109 3 124 7 5 ns limitation 3 109 3 124 How to set up 3 107 3 124 Slope Glossary 12 Slope Delayed Trigger menu 3 122 Slope Main Trigger menu 3 85 Slope Trigger 3 78 Snapshot Readout 3 135 Snapshot of Measurements 2 27 3 135 Snapshot Measure menu 3 136 Software version 3 197 Source Delayed Trigger menu 3 122 Source Main Trigger menu 3 84 3 102 3 104...

Page 371: ...rigger menu 3 109 Trigger if Slower Than Main Trigger menu 3 109 Trigger Level Bar Readout 3 42 3 71 Trigger MAIN LEVEL knob 2 15 3 78 TRIGGER MENU button 3 82 3 83 3 91 3 95 3 96 3 101 3 103 3 107 Trigger Point Readout 3 42 3 71 Trigger Position Horizontal menu 3 22 Trigger Status Lights 3 80 Trigger When Main Trigger menu 3 93 3 95 3 108 Trigger delayed How to set up 3 118 Trigger edge How to se...

Page 372: ...aving 3 165 Triggering on 3 73 Waveform clipping See Clipping Waveform Count 3 147 Waveform differentiation 3 228 Waveform FFTs 3 209 Waveform integration 3 233 Waveform memory 3 172 WAVEFORM OFF button 2 21 3 14 3 46 3 64 Waveform record FFT 3 216 FFT frequency domain 3 217 length of 3 217 FFT source 3 216 acquisition mode 3 220 defined 3 217 long versus short 3 219 FFT time domain 3 217 Waveform...

Page 373: ...lossary 13 Zoom 3 53 3 72 And interpolation 3 53 And waveforms 3 53 derivative math waveforms 3 232 Dual Window mode 3 56 Dual Zoom 3 58 Dual Zoom Offset 3 58 Incompatible with DPO 3 66 on FFT math waveforms 3 220 on integral math waveforms 3 238 ZOOM button 3 54 Zoom feature 3 53 Zoom menu Dual Zoom 3 58 Dual Zoom Offset 3 58 Preview 3 56 Reset Zoom Factors 3 56 ...

Page 374: ...Index Index 18 TDS 500D TDS 600B TDS 700D User Manual ...

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