tektronix. tds820. u..
Contents
1. Example 3 Automated Measurements If it is not already selected press Select Measrmnt main The readout for that menu item indicates which channel the measurement will be taken from All automated measurements are made on the selected channel The right side of the display shows the Select Measurement side menu That menu lists some of the possible waveform measurements There are many different measurements available You can select up to four measurements to be taken and displayed at any one time Pressing the button next to the more menu item brings up the other measure ment selections Press Frequency side If the Frequency menu item is not visible press the more side repeatedly until the Frequency item appears Then press Frequency side Observe that the frequency measurement appears within the right side of the graticule area The measurement readout includes the notation Ch1 meaning that that measurement is taken on the channel 1 waveform To take a measurement on another channel you would select that channel and then select the measurement Press Positive Width side more side Rise time side gt Positive Duty Cycle side NOTE If the instrument displays the words Low Resolution under the rise time readout it cannot take enough samples on the leading edge of the waveform to ensure accuracy Use a faster time per division setting to correct the pro2. either will repair the defective product without charge for parts and labor or will provide a replacement in exchange for the defective product In order to obtain service under this warranty Customer must notify Tektronix of the defect before the expiration of the warranty period and make suitable arrangements for the performance of service Customer shall be responsible for packaging and shipping the defective product to the service center designated by Tektronix with shipping charges prepaid Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located Customer shall be responsible for paying all shipping charges duties taxes and any other charges for products returned to 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 improper use or connection to incompatible equipment or c to service a product that has been modified or integrated with other products when the effect of such modification or integration increases the time or difficulty of servicing the product THIS WARRANTY IS GIVEN BY TEKTRONIX W
3. plug the power cord into a properly wired receptacle where earth ground has been verified by a qualified service person Do this before making connections to the input or output terminals of the digitizing oscillo scope Without the protective ground connection all parts of the digitizing oscillo scope are potential shock hazards This includes knobs and controls that may appear to be insulators Use the Proper Power Cord Use only the power cord and connector specified for your product Use only a power cord that is in good condition Use the Proper Fuse To avoid fire hazard use only the fuse specified in the parts list for your product matched by type voltage rating and current rating Do Not Remove Covers or Panels To avoid personal injury do not operate the digitizing oscilloscope without the panels or covers Take Antistatic Precautions Wear an antistatic grounding wrist strap when working with the input connec tors on the digitizing oscilloscope Electric Overload Never apply to a connector on the digitizing oscilloscope a voltage that is outside the range specified for that connector Safety Nm Man Safety Do Not Operate in Explosive Atmospheres The digitizing oscilloscope provides no explosion protection from static dis charges or arcing components Do not operate the digitizing oscilloscope in an atmosphere of explosive gases vii Safety viii Safety Islip UNIV UU LU LLL Contents Getting Sta
4. Knob Setting and Readout General Purpose Knob Icon Highlighted Menu Item with Boxed Readout Value Example 3 Automated Measurements Running Normal High Ref 90 Set Levels in units Low resolution ME 50 OmV M Sogns d 312 00ns Zany fi fini faina Sedile nr DON O O EN O E A E 50 Select i High Low 3 Remove Gating Reference Measrmnt Setup Snapshot for Chi Measrmnt OFF Histegram Levels Figure 1 18 General Purpose Knob Indicators There are several important things to observe on the screen m The knob icon appears at the top of the screen That indicates that the general purpose knob can adjust a parameter m The upper right corner of the screen shows the readout High Ref 90 m The High Ref side menu item is highlighted and a box drawn around the 90 readout in the High Ref menu item The box indicates that the general purpose knob can 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 make large changes quickly with the general purpose knob press the SHIFT button before turning the knob When the light above the SHIFT button is illuminated and the display says Coarse Knobs in the upper right corner the general purpose knob speeds up significantly The Numeric Keypad Any time the general purpose knob can adjust a parameter instead of usin
5. above the SHIFT button is illuminated and the display says Coarse Knobs in the upper right corner the knob speeds up significantly Turn the horizontal SCALE knob one click clockwise Observe the time base readout at the bottom of the display The time base should be set to 200 ns div now and you should see two complete waveform cycles on the display Getting Started inlp y IN Example 2 Multiple Waveforms Uniti Adding a Waveform Nm Man In this example you learn how to display and control more than one waveform at a time 1 If you are not continuing from the previous example follow the instruc tions on page 1 6 under the heading Setting Up for the Examples 2 Reset the digitizing oscilloscope Press SETUP Recall Factory Setup main OK Confirm Factory Init side 3 Press the AUTOSET button The VERTICAL section of the front panel contains the channel selection buttons On the TDS 820 these are CH 1 CH 2 and MORE Figure 1 12 AO EE VERTICAL ad 2 Y N Vv En MORE bid Y a A Figure 1 12 The Channel Buttons and Lights Each of the channel CH buttons has a light above its label Right now the CH 1 light is on That indicates that the vertical controls are set to adjust channel 1 4 Press CH 2 1 15 Example 2 Multiple Waveforms The display shows a second waveform which represents the signal on channel 2 superimposed on the first waveform
6. eee Pees an 3 a 3 64 Remote Communication eee eee 3 71 Saving and Recalling Setups 3 75 Saving and Recalling Waveforms 3 77 Selecting Channels Li 3 80 Status a o o Teese ae pies ee sd i 3 84 Triggering 2 ali See Se eae fas 3 85 Vertical Control si mata ia arata Daca Te a n heehee E 3 3 93 Waveform Math Lr 3 97 ZOOM eee een 3 100 Appendices Appendix A Options and Accessories A 1 Appendix B Specifications B 1 Appendix C Algorithms 0000 C 1 Appendix D Packaging for Shipment D 1 Appendix E Factory Initialization Settings E 1 Glossary Index x Contents Y UUUUU ULUI LL Preface Related Manuals Nm Man This is the User Manual for the TDS 820 Digitizing Oscilloscope The Getting Started section familiarizes you with the operation of your digitiz ing oscilloscope Operating Basics covers basic principles of the operation of the oscilloscope These articles help you understand why your instrument works the way it does The Reference section teaches you how to perform specific tasks See page 3 1 for a complete list of tasks covered in that section The Appendices provide an option and accessories listing product specifica tions and other useful information The
7. following documents are related to the use or service of the digitizing oscilloscope m The TDS 820 Programmer Manual describes using a computer to control the digitizing oscilloscope through the GPIB interface The TDS TDS 820 Reference gives you a quick overview of how to operate your digitizing oscilloscope The TDS 820 Service Manual provides information for maintaining and servicing your digitizing oscilloscope Preface Conventions In the Getting Started and Reference sections you will find various proce dures which contain steps of instructions for you to perform To keep those instructions clear and consistent this manual uses the following conventions Names of front panel controls and menu labels appear in boldface print Names also appear in the same case initial capitals all uppercase etc in the manual as is used on the oscilloscope front panel and menus Front panel names are all upper case letters for example VERTICAL MENU CH 1 etc Instruction steps are numbered The number is omitted if there is only one step When steps require that you make a sequence of selections using front panel controls and menu buttons an arrow marks each transition between a front panel button and a menu or between menus Also when a name is a main menu or side menu item it is clearly indicated Press VERTICAL MENU gt Offset main gt Set to 0 V side gt Posi tion main Set to 0 V side Using the con
8. the digitizing oscilloscope to a known factory Digitizing default state That is useful when you begin a new task and need to start Oscilloscope fresh with known default settings 1 Press the save recall SETUP button to display the Setup menu Fig ure 1 4 SAVE RECALL WAVEFORM APPLICATION MENU ACQUIRE MENU MEASURE HARDCOPY CRUN STOP SETUP Button UTILITY SHIFT CURSOR DISPLAY a AR VERTICAL 4 HORIZONTAL A TRIGGER a Figure 1 4 Menu Button Locations Gray Buttons The digitizing oscilloscope displays main menus along the bottom of the screen Figure 1 5 shows the Setup main menu Recall Factory Setup Menu ltem and Button M 500ns d 1 940ns 16mV OK 5 x A DAL confirm Factory Init Figure 1 5 The Displayed Setup Menu 1 8 Getting Started Example 1 Displaying a Waveform To select menu items from a displayed main menu you press the button below the desired menu item For example the third menu item from the left is Recall Factory Setup which is the default factory setup that you what for this example 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 screen Because an accidental instrument reset could destroy a setup that took a long time to create the digitizing oscilloscope asks you to verif
9. ITH RESPECT TO THIS PRODUCT IN LIEU OF ANY OTHER WARRANTIES EXPRESSED OR IMPLIED TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE TEKTRONIX RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES EC Declaration of Conformity Tektronix Holland N V Marktweg 73A 8444 AB Heerenveen The Netherlands declare under sole responsibility that the TDS 820 Digitizing Oscilloscope meets the intent of Directive 89 336 EEC for Electromagnetic Compatibility Compliance was demonstrated to the following specifications as listed in the Official Journal of the European Communities EN 55011 Class A Radiated and Conducted Emissions EN 50081 1 Emissions EN 60555 2 AC Power Line Harmonic Emissions EN 50082 1 Immunity IEC 801 2 Electrostatic Discharge Immunity IEC 801 3 RF Electromagnetic Field Immunity IEC 801 4 Electrical Fast Transient Burst Immunity IEC 801 5 Power Line Surge Immunity Y UUUUU LU U UL Safety Symbols and Terms Nm Man Please take a moment to review these safety precautions They are provided for your protection and to prevent damage to the digitizing oscillosco
10. There are several other important things to observe The channel readout on the display now shows the settings for both Ch1 and Ch2 There are two channel indicators at the left edge of the graticule Right now they overlap The light next to the CH 2 button is now on and the CH 1 light is off Because the knobs control only one channel at a time the vertical con trols are now set to adjust channel 2 The trigger is still detecting trigger events from the external TRIGGER INPUT This has not changed by your adding a channel You can change the trigger source by using the TRIGGER MENU button to display the trigger menu Turn the vertical POSITION knob clockwise to move the channel 2 wave form up on the graticule You will notice that the channel ground reference indicator for channel 2 moves with the waveform Now press AUTOSET again You will see the two waveforms channel 2 below channel 1 sized appropriately so that they are both entirely visible on the display Channel 1 becomes the selected waveform Press the VERTICAL MENU button The VERTICAL MENU button displays a menu that gives you control over many vertical channel parameters Figure 1 13 Although you can display more than one channel the vertical menu and buttons only adjust the selected channel Each menu item in the Vertical menu displays a side menu Right now the Offset item in the main menu is highlighted which means that the side menu shows the vertical o
11. User Manual Tektronix Y TDS 820 Digitizing Oscilloscope 070 8512 02 Instrument Serial Numbers Each instrument manufactured by Tektronix has a serial number on a panel insert or tag or stamped on the chassis The first letter in the serial number designates the country of manufacture The last five digits of the serial number are assigned sequentially and are unique to each instrument Those manufactured in the United States have six unique digits The country of manufacture is identified as follows B010000 Tektronix Inc Beaverton Oregon USA E200000 Tektronix United Kingdom Ltd London 4300000 Sony Tektronix Japan H700000 Tektronix Holland NV Heerenveen The Netherlands Instruments manufactured for Tektronix by external vendors outside the United States are assigned a two digit alpha code to identify the country of manufacture e g JP for Japan HK for Hong Kong IL for Israel etc Tektronix Inc P O Box 500 Beaverton OR 97077 Printed in U S A Copyright O Tektronix Inc 1993 All rights reserved Tektronix products are covered by U S and foreign patents issued and pending The following are registered trademarks TEKTRONIX TEK TEKPROBE and SCOPE MOBILE WARRANTY Tektronix warrants that this product will be free from defects in materials and workmanship for a period of three 3 years from the date of shipment If any such product proves defective during this warranty period Tektronix at its option
12. blem Observe that all four measurements are displayed Right now they cover a part of the graticule area including the displayed waveforms To move the measurement readouts outside the graticule press CLEAR MENU Figure 1 17 Nm Man 1 21 Example 3 Automated Measurements Removing Measurement Readouts Changing the Measurement Reference Levels Sal 1 22 Running Normal Ch1 Freq 999 84kH2 chi Width 499ns chi Rise sns Low resolution chi Duty 50 0 ST sdons7d 512 005 ajejejejojaljo Figure 1 17 Four Simultaneous Measurement Readouts The Measure menu lets you remove measurements you no longer want displayed You can remove any one measurement or you can remove them all with a single menu item Press MEASURE Remove Measrmnt main gt Measurement 1 Mea surement 2 and Measurement 4 side to remove those measurements Leave the rise time measurement displayed By default the measurement system will use the 10 and 90 levels of the waveform for taking the rise time measurement You can change these values to other percentages or change them to absolute voltage levels To examine the current values press the Reference Levels main gt High Ref side The General Purpose Knob The general purpose knob the large knob with the indentation is now set to adjust the high reference level Figure 1 18 Getting Started Nm Man General Purpose
13. ffset choices Press the Offset main button if it is not At the top of the side menu the menu title shows the channel affected by the menu choices It always matches the lighted channel button Getting Started Example 2 Multiple Waveforms Running Normal Vertical Offset 14 10mY chi Offset Side Menu Title i 14 70mV Channel Reference Bers pu E sa Da Ls aS oe si Set to 0 g Indicator i i A i _ a 0 100mv ch2 30 0mV M 500ns d 312 00ns zeny eam Po pur Figure 1 13 The Vertical Main Menu and Offset Side Menu 8 Press the side menu item that sets the vertical offset to 0 V This changes the vertical offset for channel 1 Changing Controls Pressing a channel CH button sets the vertical controls to that channel It to Another Channel also adds the channel to the display if that waveform is not already displayed 1 Press the CH 2 button in the vertical section of the front panel Observe that now the side menu title shows Ch2 and that the light above CH 2 is lighted Figure 1 14 The highlighted menu item in the side menu has changed from the vertical offset channel 1 setting to the vertical offset setting of channel 2 Because channel 2 has no signal AUTOSET may have chosen an inap propriately sensitive vertical scale setting and you may see random noise To reduce this random noise turn the vertical scale knob counter clockwise until channe
14. g the knob you can enter the value as a number using the keypad Always end the entry of a number by pressing the ENTER 4 button The numeric keypad also provides multipliers for engineering exponents such as m for milli M for mega and u for micro To enter these multiplier values press the SHIFT button then press the multiplier 1 Press Low Ref side 1 23 Example 3 Automated Measurements 2 On the numeric keypad press the 2 button the 0 button and the ENTER lt 4 button This step sets the low measurement reference to 20 Observe that the rise time value has changed Now you want to return the display to its original state 3 Press Remove Measrmnt main All Measurements side 1 24 Getting Started M1111 1 Egip W NUM Example 4 Saving Setups Saving a Setup Nm Man This example shows you how to save all the settings of the digitizing oscillo scope and how to recall the setup later to quickly reestablish the previously saved state The oscilloscope provides 10 storage locations where you can save the setups Besides being able to save several complete setups the digitizing oscillo scope saves all the parameter settings when you power off That feature lets you power on and continue where you stopped without having to reconstruct the state of the digitizing oscilloscope 1 If you are not continuing from the previous example follow the instruc tions on page 1 6 under the headi
15. ied with the digitizing oscilloscope 5 Connect the front panel external TRIGGER INPUT SMA connector to the other short SMA cable supplied with the digitizing oscilloscope 6 Connect the SMA female to female adapter to the male connection in the center of the SMA T supplied with the digitizing oscilloscope 7 Connect the other end of the SMA cable attached to CH 1 to one end of the SMA T 8 Connect the other end of the SMA cable attached to the external TRIG GER INPUT to the other end of the SMA T NOTE Splitting the signal using the SMA T does not preserve the 50 Q environment As a result you will see aberrations of the signal due to this impedance mismatch The aberrations are of no conse quence for the examples However to obtain accurate measure ments be sure you split signals using a 50 Q power divider to match the impedance of the test setup 9 Connect the other end of the long cable attached to the rear panel 1 MHz TEST SIGNAL OUTPUT connector to the SMA female to female adapt er To prevent damage to the inputs do not attempt to measure any signals greater than 3 V peak to peak with the TDS 820 with Option 1D 6 V peak to peak with the standard TDS 820 Nm Man 1 7 Inip y Example 1 Displaying a Waveform BRA In this first example you learn about resetting the digitizing oscilloscope using the autoset function and displaying and adjusting a waveform Resetting the All examples begin by resetting
16. l 2 appears as you would like Nm Man 1 17 Example 2 Multiple Waveforms Running Normal Vertical Offset 14 10mY chi Offset ertical Offset 14 10mV Side Menu Title n SOS 1 Settoov 100mv Ch2 50 0mY M 500ns d 512 00ns 2mY x S E i 5 A position 2 00 Divs Probe Functions Figure 1 14 The Menus After Changing Channels 2 Press Fine Scale main to adjust the channel 2 vertical scale 3 Use the numeric keypad to set the vertical scale to 125 mV per division Enter 125 then SHIFT then m the shifted 9 key Then press ENTER Removing a You use a two step process to remove waveforms from the display First select the channel using the channel CH button Second press the WAVE Waveform FORM OFF button 4 Press the WAVEFORM OFF button see Figure 1 15 1 18 Getting Started Nm Man Example 2 Multiple Waveforms MS VERTICAL A HORIZONTAL ZA POSITION lt posirion gt O O VERTICAL ooN HORIZONTAL e gt e A SCALE lt SCALE gt Wa WAVEFORM OFF Button WAVEFORM OFF Figure 1 15 WAVEFORM OFF Button Location Because the CH 2 light was on when you pressed the WAVEFORM OFF button the oscilloscope removed the channel 2 waveform The channel CH lights now indicate channel 1 Channel 1 has become the selected channel 5 Press the WAVEFORM OFF button again to remove channel 1 s
17. lay Main Menu and Style Side Menu Each menu item in the Display menu shows a side menu Right now the Style item in the main menu is highlighted which means that the side menu shows the style choices If it is not press the Style menu button to display them 2 Press the Vectors button on the side menu Observe that the display switches from dots the factory default setting to vectors Adjusting the The display shows the rear panel test signal It is a 1 MHz square wave of approximately 300 mV amplitude To adjust the size and placement of the Waveform Display waveform use the front panel knobs Figure 1 11 shows the main VERTICAL and HORIZONTAL sections of the front panel Each section has SCALE and POSITION knobs Nm Man 1 13 Example 1 Displaying a Waveform E VERTICAL 4 HORIZONTAL ZA POSITION Position O VERTICAL FRI HORIZONTAL ZA SCALE lt SCALE gt Wa WAVEFORM OFF Figure 1 11 The VERTICAL and HORIZONTAL Controls Turn the vertical SCALE knob a few clicks in first one direction then the other Observe the change in the displayed waveform and the channel readout at the bottom of the display Turn the vertical POSITION knob in first one direction then the other Observe the change in the displayed waveform Then return the wave form to the center of the graticule Hint To make large changes quickly with the position knob press the SHIFT button before turning the knob When the light
18. n Location Getting Started Example 1 Displaying a Waveform Running Normal Recall Factory H 50 0mv CM 500ns d 512 00ns amv OK j T Confirm Sa peer Pre eee Factory Init ave Teal HE Current Saved Factory Setup Setup Setu ajojejejojaljo Figure 1 8 The Display After Pressing Factory Initialization and Autoset Figure 1 8 shows the display after pressing AUTOSET for an instrument with delay lines NOTE If you have an instrument without delay lines TDS 820 Option 1D your display may appear slightly different but the following steps will still function as described 2 To remove a menu from the display press the CLEAR MENU button below the side menu buttons Display Elements There are several important points to observe about the digitizing oscilloscope display m The channel reference indicator shows the vertical position of channel 1 ground when offset is to 0 V Otherwise it shows ground plus offset m The trigger readout shows that the digitizing oscilloscope is triggering on a rising edge It also indicates the trigger level m The time base position readout shows the value of the main time base position the time from the trigger to the first sample Nm Man 1 11 Example 1 Displaying a Waveform Adjusting the Display m The time base readout shows that the time base is showing a horizontal scale of 500 ns div The M indicates tha
19. ng Setting Up for the Examples 2 Reset the digitizing oscilloscope Press SETUP Recall Factory Setup main OK Confirm Factory Init side 3 Press the AUTOSET button In this example you first need to create an instrument setup you want to save The next several steps establish a display with a measurement on one wave form That setup is complex enough that you would prefer not to go through all these steps each time you want that display 1 Press MEASURE gt Select Measrmnt main gt Frequency side Press the more side menu item if the Frequency selection does not appear in the side menu 2 Press the CLEAR MENU button Once you have established an instrument setup you can save it in any of several setup locations NOTE The next step asks you to save a setup in a setup location of your choice If you work in a laboratory environment where several people share the digitizing oscilloscope check with the other users to be certain the setup location you are using is not already being used by someone else 3 Press the SETUP button to display the Setup main menu see Fig ure 1 19 Press the Save Current Setup main menu button 1 25 Example 4 Saving Setups Recalling a Setup 1 26 Running Normal save Current Setup Chi Freq To Setup1 1 00056MHz user To Setup 2 factory To Setup factory To Setup4
20. olola factory 1of3 100mY M 500ns d 512 00ns 2mY more i di de Setu Setup Setup GD Figure 1 19 Save Recall Setup Menu 4 Tostore the current instrument settings into that setup location press one of the To Setup side menu buttons There are more setup 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 5 Press the MEASURE button to display the Measure main menu Select the Positive Width side menu item to add that measurement to the display To recall the setup press SETUP Recall Saved Setup main Recall Setup side for the setup location you used in Step 4 The oscilloscope returns to the setup you saved in Step 4 The positive width measurement is now removed from the display because you selected it after you saved the setup This completes the examples You can restore the default settings by press ing SETUP Recall Factory Setup main OK Confirm Factory Init side Getting Started
21. pe This safety information applies to all operators and service personnel These two terms appear in manuals statements identify conditions or practices that could result in damage to the equipment or other property n statements identify conditions or practices that could result in personal injury or loss of life These two terms appear on equipment CAUTION indicates a personal injury hazard not immediately accessible as one reads the marking or a hazard to property including the equip ment itself DANGER indicates a personal injury hazard immediately accessible as one reads the marking This symbol appears in manuals Static Sensitive Devices These symbols appear on equipment Y A DANGER Protective ATTENTION High Voltage ground earth Refer to terminal manual Safety Specific Precautions vi Observe all of these precautions to ensure your personal safety and to pre vent damage to either the digitizing oscilloscope or equipment connected to it Power Source The digitizing oscilloscope is intended to operate from a power source that will not apply more than 250 V rms between the supply conductors or between either supply conductor and ground A protective ground connection through the grounding conductor in the power cord is essential for safe system operation Grounding the Digitizing Oscilloscope The digitizing oscilloscope is grounded through the power cord To avoid electric shock
22. rted Operating Basics Reference TDS 820 User Manual Preface cee coa A ties aaa Ra ala xi Overview nale la Da Dl a it 1 1 Product Description eee eee eens 1 2 Start Up i sectiei a eta aaa are okey 1 3 Setting Up for the Examples eens 1 6 Example 1 Displaying a Waveform 1 8 Example 2 Multiple Waveforms 1 15 Example 3 Automated Measurements 1 20 Example 4 Saving Setups eee ees 1 25 Overview ie ap zica ata ee ge A Ata ale A cae 2 1 At a Glance iiss siete cee Sines it eases Hea ta Mien ate 2 3 Taggen A ok Sas ataca eae Sie e sata i Saas ede ee Gan ee chee 2 13 Acquisition liano lalla e ee tay 2 17 Scaling and Positioning Waveforms 2 21 Measurements 000 2 25 Overview a zza rsa alli 3 1 Acquisition Modes Le eee ee eens 3 2 AUTOS catas ida arc 3 6 Cursor Measurements eens 3 8 Display Modes 222 0200 eee ee eee eee ee cee eee ee a 3 14 Graphics 2c Seri AA LILLE ae 3 21 CLA 0x0 iva aia td 37 SO ee a a 3 26 ix Contents Help iii iaa 3 34 Horizontal COMtrol asirans annsan aae a Ca a 3 35 Limit Testing io ii Sede Denese a N 3 41 Measurement System 000 3 47 Probe Interface ica Soke Heil it denise eu 3 60 Probe Selection acer eee
23. sed in Start Up Table 1 1 Fuse and Fuse Cap Part Numbers Fuse Fuse Part Fuse Cap Part Number Number 25 inch x 1 25 inch UL 198 6 3AG 159 0013 00 200 2264 00 6 A FAST 250 V 5 mm x 20 mm IEC 127 5 A T 159 0210 00 200 2265 00 250 V Power On 1 Checkthatthe rear panel principal power switch is on Figure 1 1 The principal power switch controls all AC power to the instrument 2 If the oscilloscope is not powered on the screen is blank push the front panel ON STBY button to toggle it on Figure 1 2 The ON STBY button controls power to most of the instrument circuits Power continues to go to certain parts even when this switch is set to STBY Once the digitizing oscilloscope is installed it is typical to leave the princi pal power switch on and use the ON STBY button as the power switch 1 4 Getting Started Start Up Running Autoing Tektronix Committed to Excellence TDS 820 Digitizing Oscilloscope FV v2 00 e c Copyright Tektronix Inc 1991 1992 All rights reserved Power On self check PASSED Push CLEAR MENU to proceed ON STBY Button WN 20 0mY M 200ps d 21 000ns Meme elelelelslele Figure 1 2 ON STBY Button Self Test Check the self test results The digitizing 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 self tes
24. t If the self test passes the status display screen will be removed after a few seconds If the self test fails call your local Tektronix Service Center Depending on the type of failure you may still be able to use the oscilloscope before it is serv iced Power Off Toggle the ON STBY switch to turn off the oscilloscope Nm Man 1 5 inlp y WU UU Setting Up for the Examples All the examples use the same setup Once you perform this setup you do not have to change the signal connections for any of the other examples When you finish the setup should appear as shown in Figure 1 3 To 1 MHz TEST SIGNAL OUTPUT on Rear Panel Figure 1 3 The Example Setup 1 Puton the antistatic grounding wrist strap provided Be sure to wear the antistatic wrist strap when making connections to the front panel The front panel input connectors are highly susceptible to damage from electrostatic discharge Getting Started Setting Up for the Examples 2 Remove all probes cables short circuit terminations and signal inputs from the input SMA connectors along the lower part of the front panel 3 Connect the long SMA cable supplied with the digitizing oscilloscope to the 1 MHz TEST SIGNAL OUTPUT connector on the rear panel 4 Connect the front panel CH 1 SMA connector to one of the two short SMA cables suppl
25. t it is properly installed and powered on Operation Nm Man To properly install and power on the digitizing oscilloscope do the following Installation 1 Be sure you have the appropriate operating environment Specifications for temperature relative humidity altitude vibrations and emissions are included in Appendix B Specification at the rear of this manual Leave space for cooling Do this by verifying that the air intake and ex haust holes on the sides of the cabinet where the fan operates are free of any airflow obstructions Leave at least 2 inches 5 1 cm free on each side To avoid electrical shock be sure that the power cord is discon nected before checking the fuse Check the fuse to be sure it is the proper type and rating Figure 1 1 You can use either of two fuses Each fuse requires its own cap see Table 1 1 The digitizing oscilloscope is shipped with the UL approved fuse installed Check that you have the proper electrical connections The digitizing oscilloscope requires 90 to 250 VAC rms continuous range 47 Hz to 63 Hz and may require up to 300 W Connect the proper power cord from the rear panel power connector Figure 1 1 to the power system 1 3 Start Up Power Connector Principal Power Switch LL LL MUNIN ese B000000 Fuse Figure 1 1 Rear Panel Controls U
26. t it is the main time base A D indicates a delayed time base m The channel readout indicates that channel 1 Ch1 is selected lts verti cal scale is also displayed The digitizing oscilloscope always displays channel 1 at reset Running Normal Recall Factory Channel Reference Indicator Trigger Readout Time Base Readout Channel Readout GER S0 0mv M 500ns d 512 00ns 2my OK a i Dog Confirm feci freni Pri ei Factory Init sae Recall Reca 3 Current Saved Setup Setup Setu n Il Il Il Il n QQ PF Figure 1 9 Display Elements When a menu is displayed the channel time base and trigger readouts appear in the graticule area After you press the CLEAR MENU button the readouts move below the graticule After factory initialization the display is in dots mode You can adjust various display parameters using the DISPLAY button which brings up the display menu Figure 1 10 1 Press the DISPLAY button Getting Started Example 1 Displaying a Waveform Running Normal Vectors Side Menu Title Intensified Samples Infinite oe E i ee ila Sa Persistence 100my M Sdonszd 512 00 2my pariable Bey SARI eR e E pe e SE spans Style e n T Readout i Filter Graticule i Format intensity Options Sin x x Full VT n Il Il Il ini IL OU Figure 1 10 The Disp
27. unctions nlp y VA TA LI U L Product Description Your Tektronix TDS 800 Digitizing Oscilloscope is a superb tool for acquiring displaying and measuring waveforms lts performance addresses the needs of both benchtop lab and portable applications with The Appendices list the options and accessories and the product specifications 8 GHz maximum repetitive analog bandwidth in TDS 820 Option 1D 6 GHZ in the standard TDS 820 Pretrigger view not available with Option 1D Acquisition channels The TDS 820 has two You may use and display all channels simultaneously Two14 bit digitizers Up to 15 000 point record length per channel Waveform Math Invert a single waveform and add subtract and multiply two waveforms On option 2F equipped instruments integrate or differenti ate a single waveform or perform an FFT fast fourier transform on a waveform to display its frequency spectra Full GPIB software programmability GPIB hardcopy output On instru ments equipped with option 13 hardcopy output using the RS 232 or Centronics ports Complete measurement and documentation ability Intuitive graphical icon operation blended with the familiarity of traditional horizontal and vertical knobs On line help at the touch of a button Getting Started Y UU UUUUUUTL U Start Up Before you use the digitizing oscilloscope ensure tha
28. vention just described results in instructions that are graphi cally 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 button Offset 3 Press the side menu button Set to 0 V 4 Press the main menu button Position 5 Press the side menu button Set to 0 divs Sometimes you may have to make a selection from a popup menu Press SHIFT gt UTILITY System main Config popup In this example you repeatedly press the main menu button System until Config is highlighted in the pop up menu Preface IN WU rrr Overview Overview Nm Man This section presents a product description start up information and four examples discussing the digitizing oscilloscope s basic functions Use the At a Glance section starting on page 2 3 to help you locate the correct knobs buttons and menus m Example 1 teaches you how to reset the digitizing oscilloscope use the autoset function and display and adjust waveforms m Example 2 explains how to add control and delete multiple waveforms m Example 3 introduces you to the automated measurement system m Example 4 discusses saving and recalling the digitizing oscilloscope s setups If you do not perform the examples use the Operating Basics and Reference sections to learn about the digitizing oscilloscope s front panel and menu arrangement and specific f
29. wave form When you remove the last waveform all the CH lights turn off 1 19 nlp ip Example 3 Automated Measurements Displaying Automated Measurements 1 20 In this example you learn how to use the automated measurement system to get numeric readouts of important waveform characteristics 1 If you are not continuing from the previous example follow the instruc tions on page 1 6 under the heading Setting Up for the Examples Reset the digitizing oscilloscope Press the SETUP Recall Factory Setup main OK Confirm Factory Init side Press the AUTOSET button To use the automated measurement system you must have a stable display of your signal Also the waveform must have all the segments necessary for the measurement you want For example a rise time measurement requires at least one rising edge and a frequency measurement needs at least one complete cycle 1 Press MEASURE to display the Measure main menu see Figure 1 16 Running Normal Select Measurement Frequency Positi Width Negative Width H 50 0my M S00ns d 512 00n8 4mv more i i i i i dl i i E 10f8 n MER TEET aaa Remove Gating FT Reference Measrmnt Setup Snapshot for Ch Measrmnt OFF Histegram Levels ajejejejojaljo Figure 1 16 Measure Main Menu and Select Measurement Side Menu Getting Started
30. y the Recall Factory Setup main menu selection see Figure 1 6 Recall Factory OK Confirm Factory Init Menu Item and Button OK Confirm Factory Init Figure 1 6 The Recall Factory Side Menu 3 Press the button to the right of the OK Confirm Factory Init side menu item NOTE This manual uses the following notation to represent the sequence of selections you made in steps 1 2 and 3 Press save recall SET UP Recall Factory Setup main OK Confirm Factory Init side Nm Man 1 9 Example 1 Displaying a Waveform Using Autoset When you first connect a signal to a channel and display it the signal dis played may not be usable Use the digitizing oscilloscope s autoset function when that happens and you will quickly get a meaningful display For example the factory default settings are useful for many of the signals you will be viewing with your digitizing oscilloscope However they are not appropriate for the rear panel test signal output You therefore do not have a particularly usable display Now use the AUTOSET button to quickly get a clear stable display 1 Press the AUTOSET button see Figure 1 7 and observe the stable waveform display AUTOSET Button SAVE RECALL APPLICATION O MENU ACQUIRE MENU WAVEFORM MEASURE HARDCOPY RUN STOP STATUS UTILITY SHIFT HELP CURSOR DISPLAY faa AR VERTICAL A HORIZONTAL a L Figure 1 7 AUTOSET Butto
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