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Appendix B: Algorithms

TLS 216 User Manual

B–3

Hysteresis 

is a band comprising 10% of the waveform amplitude. It is used in

MCross1

, 

MCross2

, and 

MCross3

 calculations.

For example, once a crossing has been measured in a negative direction, the
waveform data must fall below 10% of the amplitude from the 

MidRef

 point

before the measurement system is armed and ready for a positive crossing.
Similarly, after a positive 

MidRef

 crossing, waveform data must go above 10%

of the amplitude before a negative crossing can be measured. Hysteresis is useful
when you are measuring noisy signals, because it allows the logic scope to
ignore minor fluctuations in the signal.

MCross1, MCross2, and MCross3 

refer to the first, second, and third 

MidRef

 cross

times, respectively. See Figure B–1.

The polarity of the crossings does not matter for these variables, but the
crossings alternate in polarity; that is, 

MCross1

 could be a positive or negative

crossing, but if 

MCross1

 is a positive crossing, 

MCross2

 will be a negative

crossing.

The logic scope calculates these values as follows:

1. Find the first 

MidRefCrossing

 in the waveform record or the gated region.

This is 

MCross1

.

2. Continuing from 

MCross1

, find the next 

MidRefCrossing

 in the waveform

record (or the gated region) of the opposite polarity of 

MCross1

. This is

MCross2

.

3. Continuing from 

MCross2

, find the next 

MidRefCrossing

in the waveform

record (or the gated region of the same polarity as 

MCross1

. This is

MCross3

.

MCross1Polarity

 is the polarity of first crossing (no default). It can be rising or

falling.

StartCycle 

is the starting time for cycle measurements. It is a floating-point

number with values between 0.0 and (

RecordLength

 – 1.0), inclusive.

StartCycle

=

MCross1

EndCycle 

is the ending time for cycle measurements. It is a floating-point

number with values between 0.0 and (

RecordLength

 – 1.0), inclusive.

EndCycle

=

MCross3

MCross Calculations

Содержание P6240

Страница 1: ...furbished and purchasing new Financing options such as Financial Rental and Leasing are also available on application TMG will assist if you are unsure whether this model will suit your requirements C...

Страница 2: ...User Manual TLS 216 Logic Scope 070 8834 01 This document supports firmware version 1 0 2e and above...

Страница 3: ...4 98 9 3 9 9 9 8 7 88 3 9 4 9 15 4 94 39 9 4 397 4 2 3 9 7 47 5 3 47 43 43 47 87 1 9 09743 3 4 7943 7 39 3 45 7 9 E 09743 3 11 7 98 7 8 7 09743 574 98 7 4 7 3 47 3 5 9 398 88 3 5 3 3 4114 3 7 7 89 7 9...

Страница 4: ...RRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES P6240 WARRANTY THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THIS PRODUCT IN LIEU OF ANY OTHE...

Страница 5: ......

Страница 6: ...lity Compliance was demonstrated to the following specifications as listed in the Official Journal of the European Communities EN 50081 1 Emissions EN 55022 Class B Radiated and Conducted Emissions EN...

Страница 7: ......

Страница 8: ...ng Basics Overview 2 1 At a Glance 2 3 Triggering 2 13 Acquisition 2 19 Scaling and Positioning Waveforms 2 23 Measurements 2 27 Reference Overview 3 1 Adjusting the Horizontal Setup 3 3 Adjusting the...

Страница 9: ...nd Channels 3 117 Triggering After Delay 3 121 Triggering on Edges 3 127 Triggering on Patterns 3 131 Triggering on Pulses 3 141 Triggering on a Sequence 3 147 Triggering on Signals 3 159 Triggering o...

Страница 10: ...as a Timing Diagram 1 20 Figure 1 16 Binary Value of a Group 1 21 Figure 1 17 Measure Main Menu and Select Measurement Side Menu 1 24 Figure 1 18 Four Simultaneous Measurement Readouts 1 25 Figure 1 1...

Страница 11: ...splay Menu Color Settings 3 42 Figure 3 21 Display Menu Change Colors 3 44 Figure 3 22 Display Menu Map Group Colors 3 45 Figure 3 23 Display Menu Restore Colors 3 46 Figure 3 24 Probe Cal Menu and Pr...

Страница 12: ...igure 3 56 Delayed Runs After Main 3 121 Figure 3 57 Delayed Triggerable 3 122 Figure 3 58 How the Delayed Triggers Work 3 123 Figure 3 59 Delayed Trigger Menu 3 125 Figure 3 60 Snapshot of Trigger St...

Страница 13: ...em 3 173 Figure 3 78 Zoom Mode with Horizontal Lock Set to All 3 177 Figure B 1 MCross Calculations B 4 Figure B 2 Fall Time B 7 Figure B 3 Hold Time B 8 Figure B 4 Rise Time B 12 Figure B 5 Setup Tim...

Страница 14: ...5 Group Selection Priority 3 120 Table 3 6 Logic Qualifiers 3 131 Table 3 7 Time Qualifiers 3 132 Table 3 8 Pulse Trigger Definitions 3 142 Table 3 9 Logic Functions 3 148 Table 3 10 Time Qualifiers...

Страница 15: ...Table of Contents viii TLS 216 User Manual...

Страница 16: ...equipment or other property WARNING These statements identify conditions or practices that could result in personal injury or loss of life These two terms appear on equipment H CAUTION indicates a pe...

Страница 17: ...udes knobs and controls that may appear to be insulators Use only the power cord and connector specified for your product Use only a power cord that is in good condition To avoid fire hazard use only...

Страница 18: ...f front panel controls and menu labels appear in boldface print H Names also appear in the same case initial capitals all uppercase etc in the manual as is used on the logic scope front panel and menu...

Страница 19: ...d to the use or service of the logic scope H The TLS 216 Programmer Manual Tektronix part number 070 8835 XX describes using a computer to control the logic scope through the GPIB interface H The TLS...

Страница 20: ...Getting Started...

Страница 21: ...agrams H four threshold level presets based on four logic families TTL CMOS ECL and ECL for deriving digital levels for BusFormTM and timing diagram displays H five trigger types Edge Pulse Pattern St...

Страница 22: ...LS 216 User Manual Product Specification The product specification is found in the TLS 216 Performance Verification and Specifications Technical Reference which is shipped as a standard accessory with...

Страница 23: ...relative humidity altitude vibrations and emissions are included in the manual TLS 216 Performance Verification and Specification shipped with this logic scope 2 Leave space for cooling Do this task b...

Страница 24: ...sping its left and right edges and snapping it off of the front subpanel When reinstalling align and snap back on 1 Check that the rear panel principal power switch is on See Figure 1 1 The principal...

Страница 25: ...y a status screen that states whether or not it passed self test If the self test passed the logic scope removes the status display screen after a few seconds If the self test fails call your local Te...

Страница 26: ...Start Up 1 6 TLS 216 User Manual...

Страница 27: ...couple input signals to the logic scope for use in the examples 1 Remove all probes and signal inputs from the 16 input connectors along the lower right of the front panel 2 Connect a probe to each o...

Страница 28: ...The logic scope displays main menus along the bottom of the screen Figure 1 5 shows the Setup main menu Recall Factory Setup Menu Item and Button OK Confirm Factory Init Menu Item and Button Figure 1...

Страница 29: ...triggers on the input signal See Figure 1 6 SET LEVEL TO 50 Button Figure 1 6 Trigger Controls Examine the Display Elements Read the following information to become familiar with the logic scope disp...

Страница 30: ...he time base readout shows that the main time base is set to a horizontal scale of 500 ms div The vertical readout indicates that Group 1 is displayed and that it includes Channel 1 as the first and a...

Страница 31: ...e waveform group containing one channel on screen Do the following steps to add additional groups with one channel for each group 1 If you have changed any control settings since resetting the logic s...

Страница 32: ...and Group 2 which contains Channel 2 H The logic scope created Group 2 containing only one channel the lowest numbered channel not belonging to any group H The group readout for each group indicates...

Страница 33: ...e waveform of the selected group highlighted on screen 2 Turn the vertical SCALE knob clockwise Observe the change in the selected waveform and the group readout at the bottom of the display 3 Turn th...

Страница 34: ...to the display if that group is not already defined Autoset the Waveforms When you first connect a signal to a channel and display it the logic scope may not scale and trigger that signal correctly Us...

Страница 35: ...ay AUTOSET Button Figure 1 12 AUTOSET Button Location Figure 1 13 shows the display after pressing AUTOSET If necessary you can adjust the waveform now by using the knobs discussed earlier in this exa...

Страница 36: ...2 Press GROUP OFF located below the vertical SCALE knob Since Group 2 was selected when you pressed the GROUP OFF button the logic scope ended display of the Group 2 waveform Note the vertical readou...

Страница 37: ...ctory Init side Press SET LEVEL TO 50 3 Use the vertical POSITION knob to move GROUP 1 to the top of the display 4 Press SHIFT and then press GROUP 6 There are several changes to the display H The ver...

Страница 38: ...nnel 7 Press First Channel in the side menu In the key pad press 3 and then press ENTER 8 Press Last Channel in the side menu In the key pad press 6 and then press ENTER Observe that Channels 3 throug...

Страница 39: ...50 ms div now and you should see two complete waveform cycles on the display Select a Single Channel The display of waveforms in an overlapping group sometimes makes it difficult to see an individual...

Страница 40: ...everal important points to observe here see Figure 1 15 H The logic scope vertically skews the waveforms relative to each other so you can compare and measure the time relation between any two wavefor...

Страница 41: ...can display the binary value of the selected group based on the levels of the waveforms the group contains Do the following steps to display the binary value of a group 1 Press CURSOR 2 Press Function...

Страница 42: ...ton corresponding to the group one of Group 1 through Group 8 that you want to delete 2 Press GROUP MENU Group Definition main Delete Group The logic scope removes the group which in turn removes all...

Страница 43: ...ss AUTOSET 4 Press MEASURE to display the Measure main menu See Figure 1 17 5 If it is not already selected press Select Measrmnt main The readout for that menu item indicates which channel or group t...

Страница 44: ...ET 8 Press Selected Channel side twice to select it and increment it to Channel 2 Note that for any group the logic scope intensifies the selected waveform in that group on screen to help you identify...

Страница 45: ...an remove them all at once Press MEASURE Remove Measrmnt main Measurement 1 Measure ment 2 and Measurement 4 side to remove those measurements Leave the rise time measurement displayed Changing the Me...

Страница 46: ...er H The upper right corner of the screen shows the readout High Ref 90 H 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...

Страница 47: ...en You can also pop up a display of almost all the automated measurements available in the Select Measrmnts side menus This snapshot of measurements is taken on the currently selected waveform in the...

Страница 48: ...1 20 Snapshot of Channel 2 2 Press Again side to do another snapshot and update the snapshot measure ments 3 Press Remove Measrmnt main to remove the snapshot display You can also press CLEAR MENU but...

Страница 49: ...that you might prefer not to go through all these steps each time you want that display 1 If you are not continuing from the previous example follow the instructions on page 1 7 under the heading Set...

Страница 50: ...l 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 Press GROUP OFF twice to turn both group...

Страница 51: ...Operating Basics...

Страница 52: ...lays from unstable jumbles or blank screens into meaningful waveforms See Triggering on page 2 13 H The acquisition system which converts analog data into digital form See Acquisition on page 2 19 H T...

Страница 53: ...Overview 2 2 TLS 216 User Manual...

Страница 54: ...r panels and the menu system These illustrations will help you understand and operate the logic scope This section also contains a visual guide to using the menu system Front Panel Map Left Side ON ST...

Страница 55: ...e 3 141 Doing a Probe Cal page 3 49 Measuring Waveforms with Cursors page 3 81 Adjusting the Vertical Setup page 3 7 Zooming on Waveforms page 3 175 Measuring Waveforms with Cursors page 3 81 Customiz...

Страница 56: ...ap Security Bracket GPIB Connector page 3 31 Centronics Connector Principal Power Switch page 1 3 Serial Number Auxiliary Trigger Input Main Trigger and Delayed Trigger Outputs TTL RS 232 Connector Fu...

Страница 57: ...and scale or display mode page 3 56 Time base type horizontal scale and trigger type page 3 3 and 3 159 Cursor measurements page 3 81 Trigger position T page 3 159 Shows what part of the waveform rec...

Страница 58: ...on 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 adjusta...

Страница 59: ...8 TLS 216 User Manual To Operate a Pop Up Menu Press to display pop ups Press it again to advance to the next selection Press here to remove menus from screen A pop up selection changes the other mai...

Страница 60: ...e 3 17 Application Menu see the Programmer manual for more details Cursor Menu see page 3 81 Delayed Trigger Menu Edge see pages 3 121 and 3 127 Delayed Trigger Menu Pulse see pages 3 121 and 3 141 De...

Страница 61: ...er Menu State see pages 3 121 and 3 165 Display Menu Settings Color see page 3 41 Display Menu Settings Display see page 3 35 Group Menu see pages 3 23 and 3 55 Hardcopy Menu see page 3 87 Horizontal...

Страница 62: ...Main Trigger Menu Pattern see page 3 131 Main Trigger Menu State see page 3 165 Main Trigger Menu Sequence see page 3 147 Measure Menu see page 3 67 More Menu see page 3 117 Save Recall Setup Menu se...

Страница 63: ...menus Press these buttons Utility Menu Calibration see page 3 53 Utility Menu Config see pages 3 108 and 3 89 Utility Menu Diagnostics see the Service manual Utility Menu I O GPIB see page 3 31 Utilit...

Страница 64: ...ord are located in time with respect to that point The logic scope continuously acquires and retains enough sample points to fill the pretrigger portion of the waveform record that part of the wavefor...

Страница 65: ...gger You can use it with both analog and digital test circuits An edge trigger event occurs when the trigger source the signal the trigger circuit is monitoring passes through a specified voltage leve...

Страница 66: ...erefore the waveform will appear to roll across the screen Of course if valid triggers occur the display will become stable on screen Since auto mode will force a trigger in the absence of one you can...

Страница 67: ...nes where on the 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...

Страница 68: ...gger The logic scope lets you set the main trigger level with the trigger THRESHOLD knob pulse and edge triggers only Delayed Trigger As mentioned earlier in this section there is also a delayed trigg...

Страница 69: ...ence on page 3 147 to learn how to trigger on a sequence of two patterns of logic levels See Triggering on Signals on page 3 159 to learn about the trigger controls and features that are common to sev...

Страница 70: ...oints and assembles them into a waveform record Sampling and Digitizing The trigger point marks time zero in a waveform record All record points before the trigger event make up the pretrigger portion...

Страница 71: ...cord There are two options for interpolation linear or sin x x Linear interpolation computes record points between the samples acquired by using a straight line fit It assumes all the interpolated poi...

Страница 72: ...an acquire and display accurately that is with less than 3 dB attenuation You can set different bandwidths with the logic scope Lower bandwidth settings let you eliminate the higher frequency componen...

Страница 73: ...Acquisition 2 22 TLS 216 User Manual...

Страница 74: ...record view help you quickly see the position of the waveform in the display See Figure 2 6 The ground reference icon points to the ground level for all waveforms in the group display mode must be set...

Страница 75: ...dicator is shown with respect to the graticule Offset adds a voltage to the reference indicator without changing the scale That feature allows you to move the waveform group up and down over a large a...

Страница 76: ...e as fast as the highest frequency component For example a signal with frequency components of 500 MHz would need to be sampled at a rate faster than 1 Gigasamples second There are various ways to pre...

Страница 77: ...ile using the fastest time per division and want to further expand it horizontal ly Autoset Autoset lets you quickly obtain a stable waveform display It automatically adjusts a wide variety of setting...

Страница 78: ...classes or tools can measure individual waveforms in any waveform group you select Graticule measurements provide you with quick visual estimates For example you might look at a waveform amplitude an...

Страница 79: ...ton There are three kinds of cursors available in that menu H Horizontal bar cursors measure vertical parameters typically volts H Vertical bar cursors measure horizontal parameters typically time or...

Страница 80: ...in seconds or hertz and area in volt seconds measurements Although the logic scope scales and positions waveforms in groups it takes automated measurements on or between individual waveforms You can s...

Страница 81: ...TLS 216 User Manual See Measuring Waveforms Automatically on page 3 67 to learn more detail about taking automatic measurements See Measuring Waveforms with Cursors on page 3 81 to learn how to take c...

Страница 82: ...Reference...

Страница 83: ...up H Adjusting the Vertical Setup H Autosetting the Logic Scope H Choosing an Acquisition Mode H Choosing a Group Display Mode H Communicating with Remote Instruments H Customizing the Display H Custo...

Страница 84: ...ence H Triggering on Signals H Triggering on States H Viewing Help H Viewing Status H Zooming on Waveforms NOTE Many of these operating tasks list steps you perform to accomplish the task You should r...

Страница 85: ...make other horizontal settings To Scale and Position You can adjust the horizontal scale and position of waveform groups in the display from the front panel without accessing menus To horizontally sca...

Страница 86: ...knobs you will affect all the waveform records in all groups displayed including those that have their display mode set to off To Check Horizontal Settings To quickly determine the horizontal scale c...

Страница 87: ...items see Triggering After Delay on page 3 121 To define how much of the record will be pretrigger and how much will be posttrigger information press HORIZONTAL MENU Trigger Position main Set to 20 Se...

Страница 88: ...mines which waveforms the horizontal position knob adjusts whether zoom is on or not Specifically it acts as follows Group only the waveform group currently selected can be zoomed and positioned horiz...

Страница 89: ...tion hardware regardless of the group display mode H A group displayed in either BusForm or Timing Diagram mode has its vertical display size set independently of the vertical scale You set it directl...

Страница 90: ...lay mode is Analog See Figure 3 3 Changing the vertical scale changes the volts per division setting By changing the vertical scale of a group displayed in analog format you vertically expand or contr...

Страница 91: ...ay based on the logic scope setup See To Check Group Settings on page 3 56 for a complete description of the Vertical Readout To check on overall vertical setup press SHIFT STATUS Waveform main Groups...

Страница 92: ...DC Bias you can ignore it and set the vertical scale to properly size the AC components For example you might be trying to measure a small AC ripple on a power supply output It may be a 100 mV ripple...

Страница 93: ...Adjusting the Vertical Setup TLS 216 User Manual 3 11 See Selecting Groups and Channels on page 3 117 See Scaling and Positioning Waveforms on page 2 23 See Zooming on Waveforms on page 3 175...

Страница 94: ...Adjusting the Vertical Setup 3 12 TLS 216 User Manual...

Страница 95: ...ximum voltage levels it finds for the channel 3 Autoset then sets the vertical scale height position and offset and the display thresholds Vhigh min and Vlow max for all groups currently defined to ma...

Страница 96: ...r the selected group 4 Press AUTOSET Autoset always uses the selected channel in its selected group no matter how many other groups are displayed If you use Autoset when none of groups 1 through 8 are...

Страница 97: ...Display Format YT Group Display Format Timing Diagram Group Display Height in Divs 8 0 2 No of Channels Displayed divided by the No of Channels Displayed Group Display Thresholds Determined based on t...

Страница 98: ...hanged by Autoset to Vertical Offset Determined based on the currently selected channel in the currently selected group Zoom Off To Find More Information See Adjusting the Vertical Scale on page 3 7 S...

Страница 99: ...mode works helps you apply them properly to specific applications In Sample mode the logic scope creates a record point by saving the first sample of perhaps many during each acquisition interval An...

Страница 100: ...Acquisition per Trigger Acquisition Mode Use to reveal variations in the signal across time Use to reduce apparent noise in a repetitive signal Finds highest and lowest record points over many acquis...

Страница 101: ...change To check on the overall horizontal setup press SHIFT STATUS System main System side Acquisition Readout Figure 3 6 Acquisition Menu and Readout To Choose an Acquisition Mode To bring up the acq...

Страница 102: ...After H Press RUN STOP button only side to use the RUN STOP button to start and stop acquiring Pressing the RUN STOP button once will stop the acquisitions The upper left hand corner in the display w...

Страница 103: ...without displaying the Acquire and Stop After menus press SHIFT and then FORCE TRIG Now the RUN STOP button operates as just described You still must display the Acquire menu and then the Stop After m...

Страница 104: ...Choosing an Acquisition Mode 3 22 TLS 216 User Manual...

Страница 105: ...e Analog mode to measure the actual response of a group of waveforms Analog mode is the only group display mode that can be switched between a display of all the channels in a group and display of a s...

Страница 106: ...ng the group Timing Diagram Mode Indicator Points To Midlevel Last Channel Analog Mode Indicator Points To Ground BusForm Mode Indicator Points To Midlevel Figure 3 8 Display Modes In Figure 3 8 the l...

Страница 107: ...up readouts for one of two pages of groups at a time where page one displays Group1 through Group 4 and page two displays Group 5 through Group 8 To force the readout to display a certain page select...

Страница 108: ...hen press any of group selection buttons GROUP 5 through GROUP 8 The MORE button allows you to select internally stored Ref waveform groups for display and manipulation The selected group is indicated...

Страница 109: ...ay of only the selected channel do the following steps 1 Press GROUP MENU Display main Analog side 2 Press Analog side again to toggle between the All and Select settings Figure 3 11 Group Display Mod...

Страница 110: ...e and use the keypad to set the height of all waveforms in the currently selected group NOTE Although the Vertical Scale knob does not size BusForm and Timing Diagram mode groups on screen you should...

Страница 111: ...et to recall the stored user defined display threshold presets for the currently selected group To Remove a Group from the Display To remove the display of a group select the group and press the GROUP...

Страница 112: ...Choosing a Group Display Mode 3 30 TLS 216 User Manual...

Страница 113: ...lity H 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 f...

Страница 114: ...connect the logic scope 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 sta...

Страница 115: ...ss To set those parameters Press SHIFT UTILITY System main I O pop up Port main GPIB pop up Configure main Talk Listen Address Hardcopy Talk Only or Off Bus side See Figure 3 15 Talk Listen Address co...

Страница 116: ...emote Instruments 3 34 TLS 216 User Manual GPIB Configuration Menu Figure 3 15 Utility Menu To Find More Information See Saving a Hardcopy on page 3 87 See the TLS 216 Programmer Manual Tektronix part...

Страница 117: ...To Check Display Status To quickly check the current display settings press the SHIFT STATUS System main Display side See Figure 3 16 Figure 3 16 Snapshot of Display Status To Access Display Settings...

Страница 118: ...s lines between the record points Dots style displays waveform record points as dots Intensified Samples style also displays waveform record points as dots However the points actually sampled are disp...

Страница 119: ...e and time appear on the display The options also control the style of trigger level bar long or short the logic scope displays To set the readout options 1 Press DISPLAY Readout main 2 Press Display...

Страница 120: ...ear interpolation For information on both types of interpolation see Interpolation on page 2 20 To change the filter type press DISPLAY Filter main Sin x x Interpola tion or Linear Interpolation side...

Страница 121: ...SPLAY Graticule main Full Grid Cross Hair or Frame Full displays a grid cross hairs and a frame Grid displays a frame and a grid Cross Hair displays cross hairs and a frame Frame displays just a frame...

Страница 122: ...Customizing the Display 3 40 TLS 216 User Manual...

Страница 123: ...isplay menu to choose the colors in which the various display objects appear To Check Display Status To quickly check the current display settings press the SHIFT STATUS System main Display side See F...

Страница 124: ...isplay on page 3 35 To Choose a Palette To select a palette of 12 colors from a menu of pre set palettes 1 Press Palette in the main menu 2 Select one of the palettes in the side menu Choose from Norm...

Страница 125: ...f light reflected from the surface It varies continuously along the color spectrum as produced by a rainbow Lightness which is the amount of light reflected from the surface It varies from black to th...

Страница 126: ...n menu See Figure 3 22 2 Press repeatedly Group in the side menu to cycle to any one of Group 1 through Group 8 A scrolling box cursor moves to enclose the selected color currently assigned to the gro...

Страница 127: ...Groups To define the color of reference groups of waveforms 1 Press Map Reference Colors in the main menu 2 Press repeatedly Ref in the side menu to cycle to any one of reference groups Ref 1 through...

Страница 128: ...n waveform intersections points where they overlap appear in the color assigned to collisions in the currently selected color palette To Restore Default Colors To restore colors to their factory defau...

Страница 129: ...Reset All Palettes To Factory restores all customized colors in all palettes to their factory settings The hue lightness and saturation of every color in all palettes are reset whether selected or not...

Страница 130: ...Customizing the Display Colors 3 48 TLS 216 User Manual...

Страница 131: ...teps 1 Install each probe to be calibrated on the input channel on which it is to be used 2 Power on the logic scope and allow a 20 minute warm up before doing this procedure 3 Press SHIFT UTILITY Sys...

Страница 132: ...be Cal completes the following actions occur H The clock icon will disappear H If every probe in the selected group compensates successfully the word Pass appears under Cal Probes in the main menu H I...

Страница 133: ...s for which you intend to erase probe calibration Press SHIFT if selecting any of one of Group 5 through Group 8 2 Press GROUP MENU Cal Probes main 3 Press OK Initialize Probes side Once erased probe...

Страница 134: ...ever been performed on an input channel or if its stored Probe Cal data is erased using the Probe Cal menu see To Initialize Probes in this article the logic scope displays Initialized status in its G...

Страница 135: ...he logic scope and allow a 20 minute warm up before doing this procedure 2 Disconnect any input signals you may have connected from all input channels CAUTION When doing steps 3 and 4 do not turn off...

Страница 136: ...Doing a Signal Path Compensation 3 54 TLS 216 User Manual Figure 3 25 Performing a Signal Path Compensation...

Страница 137: ...and adjust that group Groups can be displayed in any of three display modes Analog BusForm or Timing Diagram Groups allow you to control channels and display the signals they acquire as a single obje...

Страница 138: ...Figure 3 26 Groups Valid and Invalid To Check Group Settings To determine the composition first and last channel of any group displayed check the Vertical Readout at the bottom of the display See Figu...

Страница 139: ...nts of the group by listing the first and last channel it contains H displays only one of the two pages of live groups at a time Group 1 through Group 4 or Group 5 through Group 8 whichever page conta...

Страница 140: ...r press SHIFT and then press any of group selection buttons GROUP 5 through GROUP 8 The MORE selection button allows you to select internally stored Ref groups of saved waveforms for display 2 Press G...

Страница 141: ...he first and last channels to the lower numbered channel This operation results in a single channel group You can also increment the first last and selected channels by repeatedly pressing their menu...

Страница 142: ...More Information See Adjusting the Vertical Scale on page 3 7 See Choosing a Group Display Mode on page 3 23 See Selecting Groups and Channels on page 3 117 See Example 1 Displaying Waveforms on page...

Страница 143: ...roup See Figure 3 29 FILENAME FMT contains a saved hardcopy In this case the suffix FMT is replaced by a suffix representing the currently selected hardcopy format For example TJ appears for ThinkJet...

Страница 144: ...wild card file Figure 3 29 File Utilities Menu and Listing To Use the File Utilities The File Utilities allow you to delete rename copy or print files lock out or allow overwriting or deleting of tho...

Страница 145: ...th the directory and its contents 2 To delete the directory and its contents press OK Delete FileName side To return to the File Utilities menu without deleting the directory press the front panel but...

Страница 146: ...which you want to copy the file and press Copy name to Selected Directory side The logic scope copies all directories recursively Copies recursively means it copies both the directory and its contents...

Страница 147: ...te option is off the logic scope will allow you to immediately delete files or directories When the confirm option is on the logic scope warns you before it deletes files and gives you a chance to rec...

Страница 148: ...aging the File System 3 66 TLS 216 User Manual To Find More Information See Printing a Hardcopy on page 3 87 See Saving and Recalling Setups on page 3 105 See Saving and Recalling Waveforms on page 3...

Страница 149: ...learn how to use Measure consider some of its operating characteristics H The logic scope displays up to four measurements at one time See Fig ure 3 31 There is also a way to display all the single wa...

Страница 150: ...region in volt seconds Area measured above ground is positive area below ground is negative Burst Width Timing measurement The duration of a burst Measured over the entire waveform or gated region Cy...

Страница 151: ...ly the most positive peak voltage Measured over the entire waveform or gated region Mean Voltage measurement The arithmetic mean over the entire waveform or gated region Minimum Voltage measurement Th...

Страница 152: ...and Low Ref Skew Timing measurement The time between the first transition to an illegal state for all waveforms in a group and last transition to a legal state for the same waveforms Logic levels are...

Страница 153: ...the noise when you want that of the waveform Switching to Average acquisition mode may help by reducing the noise H To avoid measurement errors due to improper display adjust the scale of the measure...

Страница 154: ...wards when you remove any readouts above it To limit all automated measurements to a specific part of the waveform record do the following steps 1 Press MEASURE Gating main Gate with V Bar Cursors sid...

Страница 155: ...below Histogram sets the values statistically It selects the most common value either above or below the mid point depending on whether it is defining the high or low reference level Since this statis...

Страница 156: ...ypad to enter the values High Ref sets the high reference level The default is 90 Mid Ref sets the middle reference level The default is 50 Low Ref sets the low reference level The default is 10 Mid R...

Страница 157: ...e edges on the two waveforms To do these tasks do the following steps 1 Press MEASURE Select Measrmnt main Delay side This sequence brings up the Measure Delay main menu See Figure 3 35 2 Press Delay...

Страница 158: ...To main OK Create Measurement side to take the measurement you have specified To exit the Measure Delay menu without creating a delay measurement press CLEAR MENU which returns you to the Measure menu...

Страница 159: ...r negative clock in the side menu 5 To complete the measurement you have specified press Clock Source main OK Create Measurement side To exit the Measure Setup menu without creating a setup measuremen...

Страница 160: ...rm properly before taking a snapshot Snapshot does not warn you if a waveform is improperly scaled clipped low signal amplitude low resolution and so on H To vary the source for taking a snapshot simp...

Страница 161: ...n one waveform in a snapshot H To display a snapshot of a channel saved in a reference group select the reference group and channel before executing snapshot H To remove the snapshot display press any...

Страница 162: ...Measuring Waveforms Automatically 3 80 TLS 216 User Manual...

Страница 163: ...urpose knob You move one cursor independently or both cursors in tandem depending on the cursor mode As you position the cursors readouts on the display report measurement information To help you effe...

Страница 164: ...ode you move only one cursor at a time using the general purpose knob The active or selected cursor is a solid line Press SELECT to change which cursor is selected In tracking mode you normally move b...

Страница 165: ...splay Figure 3 40 Vertical Bar Cursor Readout With Binary Readout The value appearing after the upper D shows the voltage difference between the the two short horizontal bars the value appearing after...

Страница 166: ...hich it belongs Channels not belonging to a group are not displayed H displays for all grouped channels whether the group is displayed or not To Take Cursor Measurements To take cursor measurements do...

Страница 167: ...ting To adjust both cursors in Tracking mode use the general purpose knob to move both cursors To adjust the distance between cursors in Tracking mode press SELECT to temporarily suspend cursor tracki...

Страница 168: ...Measuring Waveforms with Cursors 3 86 TLS 216 User Manual...

Страница 169: ...for you to place logic scope screen copies into a desktop publishing system The logic scope supports the following formats H HP Thinkjet inkjet printer H HP Deskjet inkjet printer H HP Laserjet laser...

Страница 170: ...of those desktop publishing systems EPS Mono and Color formats are compatible with Tektronix Phaser Color Printers HPGL is compatible with the Tektronix HC100 Plotter and Epson is compatible with the...

Страница 171: ...py palette Current uses the current palette settings to create the hardcopy while Hardcopy sets the hardcopy palette to an optimal setting for hardcopy devices 5 Press SHIFT HARDCOPY MENU Port main to...

Страница 172: ...d Time Display You might need to set the date and time of the logic scope To set those parameters do the following steps 1 Press SHIFT UTILITY Config pop up Set Date Time main Year Day Month Hour or M...

Страница 173: ...ronix HC100 Plotter use the GPIB interface Many printers such as the Tektronix HC200 use Centronics interfaces Many hardcopy devices including the HC100 and HC200 with option 03 provide RS 232 support...

Страница 174: ...o pies that can be spooled depends on three variables H the amount of unused RAM H the hardcopy format chosen H the complexity of the display Although not guaranteed usually about 2 5 hardcopies can b...

Страница 175: ...ecall them using another logic scope at the remote sight You might also load the into your desktop publishing software that runs on a PC compatible To Print Using a Controller To make your hardcopies...

Страница 176: ...c scope Utility menu typically use 1 4 Type IBWRT HARDCOPY START NOTE Be sure the logic scope Utility menu is set to Talk Listen and not Hardcopy Talk Only or you will get an error message at this ste...

Страница 177: ...a Hardcopy TLS 216 User Manual 3 95 NOTE If you transmit hardcopy files across a computer network use a binary 8 bit data path To Find More Information See Communicating with Remote Instruments on pa...

Страница 178: ...Printing a Hardcopy 3 96 TLS 216 User Manual...

Страница 179: ...tall the Logic Probe The P6240 probe connects to two adjacent pins one signal and one ground The pins if round pins must be at least 0 020 inch 0 051 cm and if square pins can be as large as 0 025 inc...

Страница 180: ...n To Use Accessories with the Probe The logic scope provides a variety of accessories intended for use with the P6240 probe To learn how to use these accessories do the following tasks H To see what e...

Страница 181: ...o the probe and each other All accessories not labeled optional are standard accessories See Table 3 4 Y LeadSet SMT KlipChip One to Two Adapter Hand Held Adapter Ground Lead FlexLead Adapter Optional...

Страница 182: ...ad the Y LeadSet configuration adds inductance that should be taken into to account when probing frequencies over 30 MHz Also the length of the signal lead makes this configuration more susceptible to...

Страница 183: ...nnect probes to a 16 pin IC Use the Y LeadSet to connect between the ground pin and any signal pin on the SOIC adapter If you need to make room for additional connections to the SOIC adapter pin such...

Страница 184: ...bered tags that correspond to the channel on which the probe is installed Press one of the sticky back tags to the top of the probe cable where it enters the probe base press the other to the probe ca...

Страница 185: ...nnection Figure 3 50 Signal Variation Introduced by Probe Ground Lead 1 ns division Ringing and rise time degradation may be hidden if the frequency of the induced ringing is beyond the bandwidth of t...

Страница 186: ...Probing of Circuits 3 104 TLS 216 User Manual...

Страница 187: ...as the experiment progresses wish to return to it later This article describes how to save and recall a setup To Save a Setup To save setups in either internal memory or on the file system floppy disk...

Страница 188: ...ries in which you might want to store setup files 2 Press Save Recall SETUP Save Current Setup main To File side to display the file list and its scrollable cursor 3 Turn the general purpose knob to s...

Страница 189: ...all Setup 10 side Recalling 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 convention...

Страница 190: ...hem Press SHIFT UTILITY System main Config pop up Tek Secure Erase Memory main OK Erase Ref Panel Memory side Executing Tek Secure accomplishes the following tasks H Replaces all waveforms in referenc...

Страница 191: ...orms without loosing the data from those waveforms H Save waveform data while the logic scope is powered off H Collect waveform data in a media floppy disk that once stored you can archive transport a...

Страница 192: ...ms into reference memories remember the logic scope can display 16 waveforms total in those four memories To Save a Group To save a group to an internal reference memory do the following steps 1 Selec...

Страница 193: ...l NOTE To format disks delete group files you save to disk and otherwise manage the disk storage see Managing the File System on page 3 61 It also describes how to create and change to different direc...

Страница 194: ...scope saves the first group you save to the file TEK00001 GRP the second to TEK00002 GRP and so on To save a waveform group over an existing waveform file select the existing filename in step 3 above...

Страница 195: ...r more information on file system operation To Display a Stored Group To display a waveform group stored in an internal reference memory press MORE Reference Group main Ref1 Ref2 Ref3 or Ref4 side See...

Страница 196: ...e logic scope does not display stored reference groups from the disk Recall the reference group from disk to a reference memory as described below in To Recall a Group from Disk and then display it fr...

Страница 197: ...k Secure See Deleting All Setups and Waveforms on page 3 108 To delete waveform groups from the floppy disk rename disk files format disks create directories and otherwise manage the disk file system...

Страница 198: ...Saving and Recalling Waveforms 3 116 TLS 216 User Manual...

Страница 199: ...with groups see To Find More Information on page 3 120 To Check Which Group is Selected To quickly determine which group is selected always look at the Vertical Readout It always displays the selecte...

Страница 200: ...ideo See Figure 3 55 H The logic scope creates the group automatically if you select a group not yet defined It creates it using the first channel not allocated to another group It displays it using A...

Страница 201: ...To Display a Stored Group on page 3 113 covers using reference groups If a reference group is turned off its Display Mode menu selecting it switches its display mode to Analog so it is automatically...

Страница 202: ...er the logic scope leaves the group you turned off selected There are two orders of priority shown in Table 3 5 The one the logic scope uses depends on the type of group you turn off first If you turn...

Страница 203: ...layed triggerable mode uses the delayed trigger system Delayed runs after main looks for a main trigger then waits a user specified time and then begins acquiring See Figure 3 56 Wait User Specified T...

Страница 204: ...t to use delayed triggerable mode You define these events by setting one or both trigger systems to trigger using one of the five trigger types edge pulse pattern state or sequence That way you can sp...

Страница 205: ...r Source 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 R...

Страница 206: ...h the two probes See page 3 100 for instructions To Acquire After Delay To begin acquiring immediately after a time you set from the main trigger event expires do the following steps 1 Press TRIGGER M...

Страница 207: ...ly side Delayed Triggerable side NOTE If you press Intensified in the side menu the logic scope displays an intensified zone that shows where the delayed time base record might occur the logic scope m...

Страница 208: ...types available See Trigger Sources and Thresholds on page 3 122 for special considerations when sharing trigger sources between trigger systems NOTE When using Delayed Triggerable mode with edge or p...

Страница 209: ...h Ch 16 the Auxiliary Trigger input or the AC Line frequency 2 The logic scope compares this amplitude with the threshold level you set for triggering 3 If the trigger source amplitude transitions thr...

Страница 210: ...igure 3 61 To select which source you want for the trigger press TRIGGER MENU Type main Edge pop up Source main Channel AC Line or Auxiliary side If specifying a channel as the trigger source use the...

Страница 211: ...turn the trigger bar on or off from the Display Settings menu To set a trigger threshold and quickly copy it to a group of input channels or to all input channels refer to the general procedure To Se...

Страница 212: ...he indicator Coarse Knobs appears in the upper right corner to indicate that the general purpose knob will make larger changes to settings when turned You can set holdoff from 0 minimum holdoff availa...

Страница 213: ...ts Ch 1 through Ch 16 and Aux iliary Trigger input from the rear panel 2 As it monitors it compares ANDs NANDs ORs or NORs as you specify its inputs with the pattern of logic levels HIGH H LOW L or Do...

Страница 214: ...scope triggers at the point that the inputs go FALSE Out of Range The inputs must stay TRUE for a period that ends before a user specified minimum time or after a user specified maximum time expires...

Страница 215: ...o provide triggering on a TRUE pattern Figure 3 64 on page 3 137 locates the trigger point for this type of time qualified pattern trigger To Trigger on a Time Limit Qualified Pattern which begins on...

Страница 216: ...W L or Don t Care X that corresponds to one logic scope input The inputs are channels 1 through 16 and the Auxiliary trigger Define the Boolean Requirement by specifying that the comparison logic be A...

Страница 217: ...nu 3 Use the side buttons to set the logic level expected for the channel just selected Choose from Set to High Set to Low and Set to Don t Care Note that setting the logic level of a channel decremen...

Страница 218: ...to a group of inputs or to all inputs with one operation To set the thresholds refer the general procedure To Set Trigger Thresholds on page 3 162 NOTE See Trigger Sources and Thresholds on page 3 12...

Страница 219: ...se the general purpose knob or the keypad to set the time limit to its minimum value NOTE The minimum time qualification of 2 ns is a value the logic scope can typically achieve For warranted values c...

Страница 220: ...al purpose knob or the keypad to set the time limit from when the pattern becomes TRUE in the side menu 5 Press Time Time or Time Out side See Table 3 7 on page 3 132 to select the time qualifier that...

Страница 221: ...a Time Range Qualified Pattern To trigger on a pattern that becomes TRUE as defined by the logic selected and stays TRUE for a time that falls inside or outside a time range window that you specify d...

Страница 222: ...Triggering on Patterns 3 140 TLS 216 User Manual...

Страница 223: ...en the trigger source detects a pulse narrower or optionally wider than some specified time The logic scope can trigger on positive or negative glitches A width trigger occurs when the trigger source...

Страница 224: ...finds a positive pulse with a width between or optionally outside the user specified lower and upper time limits Width negative Triggering occurs if the logic scope finds a negative pulse with a widt...

Страница 225: ...To specify which channel becomes the pulse trigger source do the following steps 1 Press TRIGGER MENU Type main Pulse pop up Source main 2 Press Channel or Auxiliary side If specifying a channel as a...

Страница 226: ...bar that moves vertically on screen to indicate the threshold level you set press DISPLAY SETTINGS main DISPLAY pop up READOUT OPTION main Repeatedly press Trigger Bar Style side to cycle among the L...

Страница 227: ...ignore glitches that are narrower than a time you specify press Time instead of Time in step 3 above Any glitch narrow enough to trigger the logic scope triggers it at the trailing edge of the glitch...

Страница 228: ...b or use the keypad to enter the upper limit for the range of pulses to be ignored 4 Press Out of Limits side Pulses must have pulse widths that are less than the lower limit set in step 2 or that exc...

Страница 229: ...ation affects the actual point at which triggering occurs The logic scope executes the following steps when sequence triggering 1 After hold off ends the logic scope monitors its inputs Ch 1 through C...

Страница 230: ...RUE with the end pattern after a user specified time expires The logic scope triggers at the point the end pattern becomes TRUE Time Out The inputs must first compare TRUE1 2 with the start pattern Th...

Страница 231: ...which triggering occurs read the procedures in the following list To Trigger on a Sequence which begins on page 3 150 lists the basic procedure to set up the logic scope to do a sequence trigger To T...

Страница 232: ...out To Trigger on a Sequence If you want to trigger on a sequence of two TRUE as defined by the logic selected patterns you must do the following tasks Define the Start and End Patterns by specifying...

Страница 233: ...keypad or repeatedly press Ch Index to enter the channel you want to set The channel selected appears in the Source menu item 3 Press Set to High Set to Low and Set to Don t Care side to set the logi...

Страница 234: ...l you want to set The channel selected appears in the Source menu item 3 Press Set to High Set to Low and Set to Don t Care side to set the logic level you want applied to the channel just selected No...

Страница 235: ...d NOR independently for the start and end patterns they must share the same trigger threshold levels For example the threshold level you set for Ch1 is used for both patterns Also when using sequence...

Страница 236: ...up Time Qual main Limit pop up 3 Press Sequence Trigger When main Time side 4 Press Time side Use the general purpose knob or the keypad to set the time limit to its minimum value NOTE The minimum ti...

Страница 237: ...tions thresholds and the trigger mode and holdoff using the methods outlined in To Trigger on a Sequence on page 3 150 2 Press TRIGGER MENU Type main Sequence pop up Time Qual main Limit pop up 3 Pres...

Страница 238: ...alification the trigger event occurs when the time specified expires H If using any other time limit or range qualification the trigger event occurs at the time the end pattern becomes TRUE Reference...

Страница 239: ...ger on a sequence of two TRUE patterns where the second end pattern becomes TRUE relative to the first pattern at a time that falls inside or outside a time range window you specify do the following s...

Страница 240: ...Triggering on a Sequence 3 158 TLS 216 User Manual To Find More Information See Triggering on page 2 13 See Triggering on Signals on page 3 159...

Страница 241: ...e Information on page 3 164 To Trigger from the Front Panel Several trigger functions can be operated from the front panel without accessing the trigger menu To use those controls do the following pro...

Страница 242: ...want to initiate a single sequence of acquisitions Use SINGLE TRIG with any of the five trigger types To leave Single Trig mode press SHIFT ACQUIRE MENU Stop After main RUN STOP Button Only side Read...

Страница 243: ...play menu to appear at all The trigger level bar shows only the trigger level and it remains on screen regardless of the horizontal position as long as the channel providing the trigger source is disp...

Страница 244: ...t Trigger Thresholds Examine the following procedures to see the four different methods you can use to set up your trigger thresholds These procedures cover all five trigger types To set the trigger t...

Страница 245: ...he same threshold voltage and set its threshold using the appropriate procedure as described in Set Thresholds Independently on page 3 162 2 Press Copy to Group side The logic scope sets the trigger t...

Страница 246: ...ge is fixed at 12 divisions from the center screen At 100 mV the next 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 To Find Mor...

Страница 247: ...edge of the clock input you define changes state in the direction you define 2 At the clock transition it compares ANDs NANDs ORs or NORs as you specify its inputs with the pattern of logic levels HI...

Страница 248: ...pattern definition at the time the clock changes state To Check Trigger Status To tell if the currently selected trigger type is set to State check the trigger readout displayed in the lower left corn...

Страница 249: ...nds to one logic scope input The inputs are channels 1 through 16 and the Auxiliary trigger Define the Boolean Requirement by specifying that the comparison logic be AND NAND OR or NOR See Table 3 11...

Страница 250: ...re set to Don t Care The logic scope only recognizes patterns that have at least one input set to HIGH or LOW To define the Boolean requirement for a TRUE pattern select the logic function AND NAND OR...

Страница 251: ...uates the pattern Figure 3 75 on page 3 167 shows state triggering on a three waveform pattern bottom three waveforms at the time the clock changes state going positive top waveform To change trigger...

Страница 252: ...Triggering on States 3 170 TLS 216 User Manual...

Страница 253: ...his article describes how to display help on screen To Access On Line Help To enter help mode press HELP See Figure 3 76 While in help mode pressing any button except HELP or SHIFT or turning any knob...

Страница 254: ...p text referring to a menu it displays when pressed with help off To see help text on the undisplayed menu do the following steps 1 Press HELP to exit help mode Note the menu is still displayed 2 Pres...

Страница 255: ...Banner main System displays information about the Display I O Horizontal Zoom Acquisi tion Measure and Hardcopy systems Figure 3 77 This display also tells you the firmware version Waveform displays...

Страница 256: ...Viewing Status 3 174 TLS 216 User Manual...

Страница 257: ...ally zoom expands either the selected group all live groups or all live and reference groups depending on the setting for Horizontal Lock in the Zoom menu Zoom expands on screen for all three group di...

Страница 258: ...he zoom menu The ZOOM front panel button should light up 5 Adjust the vertical zoom factor using the vertical SCALE knob Adjust the vertical position of the zoomed group using the vertical POSITION kn...

Страница 259: ...orizontal Lock affects which waveforms the horizontal control positions whether zoom is on or off The rules for the three settings are as is listed in step 6 Only the selected group will zoom vertical...

Страница 260: ...actors side Table 3 12 Zoom Defaults Parameter Setting Zoom Vertical Position 0 Zoom Vertical Gain 1X Zoom Horizontal Position Tracking Horizontal Position Zoom Horizontal Gain 1X To return to normal...

Страница 261: ...Appendices...

Страница 262: ...Hz A5 Switzerland 220 V 50 Hz When Option B1 is ordered Tektronix ships a service manual with the logic scope With this option Tektronix ships a set of 16 coaxial adapters These adapters provide a 50...

Страница 263: ...the Logic Scope are shipped with the option 1R With this option Tektronix ships a Tektronix Phaser 140 360 dpi inkjet color printer Order option 3I for 220V use or option 3P for 110 V use With this o...

Страница 264: ...013 0281 00 Marker Tags Qty 3 Used with probe 334 8632 00 Eight Cable Loom Qty 6 Used with probe 352 1039 01 Logic Scope to Coax Adapter Qty 2 013 0282 00 You can also order the following optional ac...

Страница 265: ...ucts recom mended for use with your logic scope Table A 4 Accessory Software Software Part Number EZ Test Program Generator S45F030 Wavewriter AWG and waveform creation S3FT400 TekTMS Test management...

Страница 266: ...in max and Histogram Min Max Method defines the 0 and the 100 waveform levels as the lowest amplitude most negative and the highest amplitude most positive samples The min max method is useful for mea...

Страница 267: ...eform middle reference level Typically set to 50 You can set it from 0 to 100 LowRef defines the waveform low reference level Used in fall and rise time calculations Typically set to 10 You can set it...

Страница 268: ...ut the crossings alternate in polarity that is MCross1 could be a positive or negative crossing but if MCross1 is a positive crossing MCross2 will be a negative crossing The logic scope calculates the...

Страница 269: ...between 0 0 and 1 0 samples This value is determined by the instrument when it receives a trigger The actual zero reference trigger location in the measurement record is at TPOS TSOFF The automated m...

Страница 270: ...is MCrossStart 2 Find the last MCross begin the search at EndCycle and search toward StartCycle This crossing is MCrossStop MCrossStop could be a different value from MCross1 3 Compute BurstWidth MCro...

Страница 271: ...ing on the second waveform Delay is not available in the Snapshot display Timing measurement The time taken for the falling edge of a pulse to drop from a HighRef value default 90 to a LowRef value de...

Страница 272: ...urement The time between the first transition to an illegal state for all waveforms in a group except the clock and the clocking edge of the waveform in the channel specified as the clock The clock ca...

Страница 273: ...MCrossClock Positive hold times indicate that the clock edge occurred before the first transition in the waveform group Negative hold times indicate that the clock edge occurred after the first trans...

Страница 274: ...rm samples from Start to End inclusive and set Min equal to the smallest magnitude Waveform value found Timing measurement The ratio of the negative pulse width to the signal period expressed as a per...

Страница 275: ...get a specific phase measurement you must specify the target and reference sources Phase is determined in the following manner 1 The first MidRefCrossing MCross1Target and third MCross3 in the source...

Страница 276: ...m a LowRef value default 10 to a HighRef value default 90 Figure B 4 shows a rising edge with the two crossings necessary to calculate a Rise Time measurement 1 Searching from Start to End find the fi...

Страница 277: ...t Waveform Start Otherwise RMS End Start Waveform t 2dt End Start SampleInterval For details of the integration algorithm see below The integration algorithm used by the logic scope is as follows B A...

Страница 278: ...ge of the waveform specified as the clock The clock can be any channel It does not have to be included in the measured group Setup measurements define legal state as a level either below the low refer...

Страница 279: ...eference level or above the high reference level that is set in the Measure menu They define an illegal state as a level between the the low and high reference levels Setup is determined in the follow...

Страница 280: ...elope waveforms must be treated differently from time measurements on other waveforms because envelope waveforms contain so many apparent crossings Unless otherwise noted envelope waveforms use either...

Страница 281: ...sing or off scale the measurements will linearly interpolate between known samples to make an appropriate guess as to the sample value Missing samples at the ends of the measurement record will be ass...

Страница 282: ...choice from the Set Levels in Units selection of the Measure menu then could give a CLIPPING warning NOTE When measurements are displayed using Snapshot out of range warnings are NOT available However...

Страница 283: ...Appendix B Algorithms B 18 TLS 216 User Manual...

Страница 284: ...tag to the logic scope 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 logic scope with polyethyle...

Страница 285: ...Appendix C Packaging for Shipment C 2 TLS 216 User Manual...

Страница 286: ...V Bar 1 position 10 of the record length Cursor V Bar 2 position 90 of the record length Cursor mode Independent Cursor function Off Cursor time units Seconds Delayed edge trigger level 0 V Delayed ed...

Страница 287: ...Delayed Channel 1 Group definition First last and selected channel Channel 1 Group selection Group 1 containing Channel 1 only is on all other groups off Group display mode Analog Group display thresh...

Страница 288: ...ge qualified Main and Delayed 2 0 ns Pattern and Sequence trigger lower limit time time range qualified Main and Delayed 2 0 ns Pattern and Sequence trigger qualifier time range qualified Main and Del...

Страница 289: ...d waveforms No change Vertical bandwidth all groups Full Vertical offset all groups 0 V Vertical position all groups 0 divs Vertical volts div all groups 100 mV div Zoom horizontal all groups 1 0X Zoo...

Страница 290: ...Glossary...

Страница 291: ...uencies or fast transitions A condition that occurs when a logic scope digitizes at an effective sampling rate that is too slow to reproduce the input signal The waveform displayed on the logic scope...

Страница 292: ...ire with no more than 3 dB 707 attenuation of the original reference signal Burst width A timing measurement of the duration of a burst BusForm Mode A logic scope display mode that displays each wavef...

Страница 293: ...tude voltage measurement of the arithmetic mean over one cycle Cycle RMS The true Root Mean Square voltage over one cycle DC coupling The coupling mode used by the logic scope to couple both AC and DC...

Страница 294: ...logic scope detects positive spike widths less than the specified glitch time Glitch negative trigger Triggering occurs if the logic scope detects negative spike widths less than the specified glitch...

Страница 295: ...respect to ground and the voltage value between the bars Interpolation The way the logic scope calculates values for record points when the logic scope cannot acquire all the points for a complete rec...

Страница 296: ...thmetic mean over the entire waveform Minimum Amplitude voltage measurement of the minimum amplitude Typically the most negative peak voltage NAND A logic Boolean function in which the output of the A...

Страница 297: ...ons The combination logic functions are AND OR NAND NOR the conditions are time limit and time range The inputs compared are channels 1 through 16 and the auxiliary input Peak to Peak Amplitude voltag...

Страница 298: ...ocess of converting an analog input that has been sampled such as a voltage to a digital value Probe Calibration A logic scope routine you can run to optimize a probe for the channel it is connected t...

Страница 299: ...it can be quantized Selected group The group to which the logic scope applies changes to the vertical controls such as vertical position and scale adjustments The group reference indicator for the se...

Страница 300: ...are time limit and time range The inputs compared are channels 1 through 16 and the auxiliary input Tek Secure This feature erases all waveform and setup memory locations setup memories are replaced w...

Страница 301: ...bars you position to measure the time parameter of a waveform record The logic scope displays the value of the active move able cursor with respect to trigger and the time value between the bars Wave...

Страница 302: ...Glossary Glossary 12 TLS 216 User Manual...

Страница 303: ...Index...

Страница 304: ...18 Amplitude B 4 Area B 4 Burst Width B 5 Cycle Area B 5 Cycle Mean B 5 Cycle RMS B 5 Delay B 6 Fall Time B 6 Frequency B 7 High B 7 Hold B 7 Integration B 12 Low B 8 Maximum B 8 Mean B 9 Minimum B 9...

Страница 305: ...111 Select 3 85 SET LEVEL TO 50 3 159 SHIFT 3 8 Side menu 2 3 SINGLE TRIG 3 21 3 160 STATUS 3 173 TOGGLE 2 28 Glossary 10 TRIGGER MENU 3 128 3 134 3 143 3 151 3 162 3 167 UTILITY 3 33 3 88 WAVEFORM OF...

Страница 306: ...ay settings menu 3 39 Cursor 2 28 3 81 3 86 Glossary 3 Binary readout with 3 83 Description of 3 81 Faster positioning 3 85 Horizontal bar 2 28 3 81 Measurements 2 28 Measuring Waveforms with Cursors...

Страница 307: ...Adjust 3 41 Display menu 3 35 Contrast 3 37 Display 3 35 Display T Trigger Point 3 37 Intensity 3 37 3 40 Overall 3 37 Procedure to access 3 35 Readout 3 37 Settings 3 35 Text Grat 3 37 Trigger Bar 3...

Страница 308: ...3 173 Fit to screen Horizontal menu 3 5 Flex adapter 3 101 FORCE TRIG button 3 160 Format Floppy disk 3 65 Format File Utilities menu 3 65 Format Hardcopy menu 3 89 Frame Display settings menu 3 39 Fr...

Страница 309: ...3 29 Store User2 Preset 3 29 Timing Diagram 3 26 TTL 3 28 Vertical Controls 3 9 Vhigh min 3 28 Vlow max 3 28 Group mode OFF 3 29 Group Modes Description of 3 23 GROUP OFF button 3 29 3 119 Group refer...

Страница 310: ...to 10 3 6 Set to 20 3 5 Set to 50 3 5 3 6 Set to 80 3 5 Set to 90 3 6 Time Base 3 5 3 124 Trigger Position 3 5 HORIZONTAL MENU button 2 17 3 124 Horizontal POSITION knob 3 3 3 176 Horizontal Readouts...

Страница 311: ...136 3 168 Define Pattern 3 135 3 151 3 152 3 168 Edge 3 128 3 162 Either 3 144 3 145 End Pattern Logic Func 3 152 Glitch 3 143 Holdoff 3 136 3 143 3 153 3 169 Level 3 144 3 162 3 163 Mode Holdoff 3 12...

Страница 312: ...9 Positive width 3 70 Propagation delay 3 68 Readout 3 67 3 71 Reference levels 1 25 Rise time 1 24 3 70 Glossary 9 RMS 3 70 Glossary 9 Setup 3 70 Skew 3 70 Undershoot Glossary 6 Width 1 24 Glossary 6...

Страница 313: ...ttern trigger 3 131 3 140 3 147 3 158 Definitions 3 131 3 132 Determining Setup 3 133 3 142 3 150 Pattern Main Trigger menu 3 134 3 151 Patterns Triggering on a Sequence of 3 147 PCX 3 87 PCX Color Ha...

Страница 314: ...ecalling Waveforms 3 109 Record length 1 1 2 19 3 5 Glossary 8 Record Length Horizontal menu 3 5 Record View 2 6 2 23 3 4 3 9 3 161 RecordLength Measurement variable B 2 Ref Color menu 3 45 Ref1 Ref2...

Страница 315: ...cted group Glossary 9 How to check for 3 117 How to select 3 119 Selected waveform Glossary 9 Selecting Groups and Channels Reference Article 3 117 Self test 1 5 Sequence Triggering on 3 147 Sequence...

Страница 316: ...Tutorial Example 1 23 Talk Listen Address Utility menu 3 33 Tek Secure 3 108 Glossary 10 Tek Secure Erase Memory Utility menu 3 108 Temperature compensation 3 53 3 54 Temperature Color menu 3 42 Text...

Страница 317: ...8 GPIB 3 33 Hardcopy 3 33 Hardcopy Talk Only 3 88 I O 3 88 Off Bus 3 33 OK Erase Ref Panel Memory 3 108 Port 3 33 System 3 88 Talk Listen Address 3 33 Tek Secure Erase Memory 3 108 V Variable Persiste...

Страница 318: ...Width 1 24 Glossary 6 Glossary 8 Width trigger 3 141 3 145 Width Main Trigger menu 3 145 Y Y lead adapter 3 100 YT format Glossary 11 Z Zoom 3 175 3 178 And groups 3 175 And interpolation 3 175 Descr...

Страница 319: ...Index Index 16 TLS 216 User Manual...

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