Home

User Manual

Contents

1. EC DC 0 Set to DC Coupling Mou o dogm Wn lta ID lv i I TEENS NEN RID HR TTE Jg RI L i d b0pOE GR JG 1310 Figure 2 2 44g dr ee OR GOoB G3 HBOB8 G o BB o8 G3 M B3 mH B BoN B3 3 BM 3 H MM 3 3 M 3 M 3 BM 3 3 3 m m 3 m s s m m m s m s wi DC status Ey 10 Gm Protek Test amp Measurement 2 3 Press CH1 Coupling gt GND to set CH1 s coupling as GND In this setting it disconnects the input signal The screen displays as Figure 2 3 Set to GND Coupling i FF CAP EKER a RAE a 8 x rani n Pyd pde Shee Pay ETE 00M Volts Dis Figure 2 3 Y eee T A 2m ES PERR HESSE ee nid OC etd con GND status CHIL MEETS Time 100 0ns 2 Set up the channel bandwidth limit To use CH1 as an example input a signal which contains high frequency component Press CH1 gt BW Limit gt OFF to set up bandwidth limit to OFF status It will pass the high frequency component in the signal and the oscilloscope is set to full bandwidth The waveform is displayed as Figure 2 4 Set off bandwidth n 4 s E i 7 i i 1 i l S J We al s Figure 2 4 i nbi Cn f alts Ln Protek Test amp Measurement 2 4 Press CH1 gt BW Limit gt OFF to set up bandwidth limit to ON status It will reject the high frequency component above 20MHz The waveform is displayed as Figure 2 5 I En DAD Set bandwidth limit to 20M Figure 2 5
2. aa G amp Go 3 Gon 3 9 3 3 3 mB NW B H B 3 m 3 3 3 m mo 5 3 3 s s s m s s s s M I xssccEEIsc2ccc amp cEX G ee EES EIE DIE Time 100 0ns limit symbol a Protek Test amp Measurement 2 5 3 Volts Div settings You can set the Volts Div into Coarse or Fine resolution Coarse It is the default setting of Volts Div and it makes the vertical scaling in a 1 2 5 step sequence from 2 mV to 5 V Fine This setting changes the vertical scale to small steps between the coarse settings It will be helpful when you need to adjust the waveform s vertical size in smooth steps Note When the Volts Div is set to Fine there will appear a question mark in the status bar at the bottom of the screen For more details please see Figure 2 6 On TES EBIB d Volts Div Set Vernier toFine j L m B i J TUE 3 mv Time TEE Symbol for Fi gure 2 6 Fine setting Protek Test amp Measurement 2 6 4 Probe Attenuation Setting If you are using a probe the oscilloscope allows you to enter the attenuation factor for the probe The attenuation factor changes the vertical scaling of the oscilloscope so that the measurement results reflect the actual voltage levels at the probe tip To change or check the probe attenuation setting press the Or key according to which channel you are using Next toggle the Probe softkey to change the attenuation factor to match the probe y
3. e Press softkey to select Rising Slope e Press softkey to select Source as CH1 e Press softkey to select Mode as Single e Press softkey to select Coupling as DC e Turn the vertical and horizontal SCALE knobs to adjust the Volts Div and the Timebase in a proper range for the signal e Turn the LEVEL knob to adjust the trigger level 3 Press RUN STOP key to start capturing When the trigger conditions are met data appears on the display representing the data points that the oscilloscope obtained with one acquisition Pressing the RUN STOP key again rearms the trigger circuit and erases the display Protek Test amp Measurement 3 3 Example 4 To reduce the random noise on a signal If the signal you are applying to the oscilloscope is noisy Figure 3 2 you can set up the oscilloscope to reduce the noise on the waveform First stabilize the displayed waveform by removing the noise from the trigger path Second reduce the noise on the displayed waveform E E E 4 m Ll ui HI EXON Time 100 0us Figure 3 2 1 Connect a signal to the oscilloscope and obtain a stable display 2 Remove the noise from the trigger path by turning on HF Reject HF Reject High frequency reject adds a low pass filter with the 3 dB point at 150 kHz You use HF reject to remove high frequency noise such as AM or FM broadcast stations from the trigger path LF Reject Low frequency reject adds a high pass filter with the 3 dB point
4. E a a a LL LL d Lll ppl 4 00y Figure 2 14 Use cursor to measure magnitude Protek Test amp Measurement 2 15 Using REF Reference Waveforms are saved waveforms to be selected for display The reference function will be available after saving the selected waveform to nonvolatile memory Displaying a Reference Waveform e To display a waveform stored in nonvolatile memory do these steps e Push key to show the reference waveform menu e Select Storage section No 1 No 2 No 3 No 4 or No 5 associated with saved waveforms e Select Source CH1 or CH2 to display the channel you want When a reference waveform is selected it appears in white color Table2 6 Select stored waveform for REF display Valid Status Display reference status Invalid CH Select channel for REF inves ON Set ON to invert the REF waveform OFF Restore to original display of the waveform storage tatus Vahd Sree Figure 2 15 IC TAI Invert Time 1 00Gus Protek Test amp Measurement 2 16 Removing Reference Waveforms from the Display To remove a reference waveform from the display select that reference waveform and then push the waveform key Scaling and Positioning a Reference Waveform You can position and scale a reference waveform independently from all other displayed waveforms Select the reference waveform and then adjust it with a vertical POSITION Or knob You can do th
5. MEASURE Source CH1 or CH2 Select parameters page for measuring You could select voltage or time parameters pages by pressing softkey as follows MEASURE Type Voltage1 3 Voltage2 3 Acquire the measured value on the screen You could select the parameters you are interested in by pressing the softkey on the right of the menu You could read the data on the bottom of the screen after pressing the button If the data is displayed as that means the parameter cannot be measured Clear the measure value As the menu of the following figure shows set the None under the option of Source and then press the No 2 menu operation key to select Clear All Now all of the auto measure values disappear from the screen Figure 2 48 MEASURE Source Hone Press the Nol key to enter the status of clear measure Clear all lt 4 Clear the display measure parameter Protek Test amp Measurement 2 54 The automatic measurement of the voltage parameters The 6800 series oscilloscopes provide voltage measurements including Vpp Vmax Vmin Average Vrms Vtop and Vbase Figure 2 49 below shows pulse with some of the voltage measurement points Vmax Vmin Vpp Vmax Vmin Vtop Vbase Average Vrms Figure 2 49 Measured over the entire waveform The maximum amplitude The most positive peak voltage measured over the entire waveform The minimum amplitude The most negative peak voltag
6. REP a onion endesdiid sa di 2 16 IS fere tle oec ee Deseo E EE tennis 6 1 Roll Moderan 2 22 2 39 RUNS DO Pisuen 2 62 S sampling System ess 2 35 Protek Test amp Measurement Save and Recallsdssssontrietes 2 41 DOIGED TOS ois eoo de ais 2 48 SEIIS firesi 2 48 Sinole TrIg Set ainiin a 2 34 S FORA GB iioi tun ete Rs tesa 2 41 Syl PU SES ccce Deetee eto te be detis 2 3 T PHIM DIV der cocco cese terere cepe nne 1 13 Tittie Das sss out en oen Dui eno Prod 2 25 Trio ODSeLoetedateitedaestiodistestudim 1 14 bg s TM RT ET E 6 4 THe cer CON c een es 1 15 THOEGEL SVSICHTEs ui aid bodas 2 29 Troubleshooting 4 3 U VEZ OOo ostro oat imeedt 1 14 2 23 RB prr rH 2 43 V MOLIIGT A E AEE Eesti ned ANTEA 1 12 2 6 haie ec EE 6 2 Vertical Calibration 2 45 Vertical POSITION Knob 2 19 Vertical SCALE Knob 2 19 Verticals stent sehen toes 2 2 Vertical Window 1 11 Video Sipnal iu uie oce dentes 3 10 Video dg Ser scettr eet 2 3 X b ETA TE 2 22 2 28 3 8 D A EEE E E A A E A A PN 2 22 2
7. 2 39 How to Set Up the Display System Figure 2 27 shows the menu button for the display system on the front panel MENU C IRE STORAGE Figure 2 27 DISPLAY UTILITY C 06 O Display Setting Menu Press the DISPLAY key to pop up the menu for the settings of the screen Figure 2 28 Table 2 16 DISPLAY Vectors Vectors fills the space between MM adjacent sample points in the display Dots Dots displays only the sample points Infinite Set the sample point remains displayed Persist until turn the persistence OFF OFF Turn off the persistence Persist Grd Contrast OFF Turn off the grids p Sd nli Increase contrast of the screen M Lor Press the function key to decrease the Decrease contrast of the screen Contrast NOTE The vector display is available at the time base of 50ns div or slower Protek Test amp Measurement 2 40 How Save and Recall Waveforms or Setups Figure 2 29 shows the menu button for the storage system on the front panel Storage Setting Key MENU MEASURE Figure 2 29 RSOR DISPLAY UTILITY Press the STORAGE key to pop up the menu for the settings of the storage system Figure 2 30 Table 2 17 Waveforms Waveforms Set the operation to save or load the waveforms Setups Set the operation to save or load the instrument settings Sets the instrument controls to the default Storage factory settings and this item will appear after select Setups Specifies the mem
8. Controls Throughout this book the front panel keys are denoted by a box around the name of the key and softkeys are denoted by a drop shadow For example is a front panel key labeled CH1 under the vertical portion of the front panel and Coupling 1s a softkey The word Coupling is on the top of the menu directly on the left of an unlabeled softkey which is also gray Protek Test amp Measurement 1 3 The position of current Trigger position Trigger position in window in memory in memory current window Trigger source and trigger type Coupling symbol Execute status 5 a TINTE Pl 000 Channel 1 symbol P MES A IR CELL LIIS are es e ZI IC ETE 71 FE a re 000 Volts Lhv LEFLVETVEPFVTIYMFESESTYLWYATHTAVgPFIIHLSIE2ZZIgBgJZgSSFEFFBELmEVFFILFFEPFVFPEFIGLlN TAN Channel 2 symbol z Probe Waveform display CHI status CH2 status Timebase Trigger status position Figure 1 3 User Interface Protek Test amp Measurement 1 4 To inspect the instrument After you get a new 6800 series oscilloscope please inspect the instrument according to the following steps 1 Inspect the shipping container for damage Keep a damaged shipping container or cushioning material until the contents of the shipment have been checked for completeness and the instrument has been checked mechanically and electrically 2 Check the accessories Accessories supplied with the instrument are li
9. Range 10S s 100MS s Real Time 10GS s Equivalent Waveform Interpolation Sin x x Record Length 16K samples for each channel Fast Trigger OFF 2K samples for each channel Fast Trigger ON SEC DIV Range 5ns div 5s div 1n 1 2 5 steps UltraZoom to 2 5ns div sample Rate and 100ppm over any 21ms time interval Delay Time Accuracy Delta Time single shot 1 sample interval 100ppm reading 0 6 Measurement Accuracy ns Full Bandwidth gt 16 averages 1 sample interval 100ppmxreading 0 4 ns Protek Test amp Measurement 6 3 Same as DC at 50Hz and above same as the DC coupled limits for frequencies above 100 kHz attenuates signals below 8kHz HF REJ Same as the DC coupled limit from DC to 10 kHz attenuates signals above 150 kHz Trigger Level Range 8 divisions from center of screen 1 6V 8V Trigger Level Internal 0 3divx Volts div 4 divisions from center Accuracy typical of screen typical Video Trigger Sensitivity Video Trigger Type typical Signal Formats and Supports NTSC PAL and SECAM broadcast systems for Field Rates Video any field or any line Trigger Type Trigger Sensitivity DC CHI CH2 Idiv DC 10MH2 Edge Trigger Type EXT 100mV DC 10MH 200mV 10MHz Full EXT 5 500mV DC 100MHz LF REJ T Measurements Cursors Manual Voltage difference between cursors AV Measure Time difference between cursors AT Reciprocal of AT in Hertz 1 AT Trace Voltage value for Y
10. capture the phase changes through the circuit To view the input and output of the circuit in an x y display do these steps LE 2 Set the probe menu attenuation to 10X Set the switch to 10X on the probes Connect the channel 1 probe to the input of the network and connect the channel 2 probe to the output If the channels are not displayed press the and CH2 keys Press the AUTO key Adjust the vertical SCALE knob to display approximately the same amplitude signals on each channel Press the MENU in horizontal control area to display the menu Press the Format softkey to select X Y The oscilloscope displays a Lissajous pattern representing the input and output characteristics of the circuit Adjust the vertical SCALE and POSITION knobs to display a desirable waveform Apply the Ellipse method to observe the phase difference between the two channels See Figure 3 6 Protek Test amp Measurement 3 8 Signal must be centered in X Figure 3 6 Sin6 A B or C D where O phase shift in degrees between the two signals From the formula above you could get that tarcsin A B or tarcsin C D If the main axis of the ellipse is at I and III quadrant 0 must be in the range of O 1 2 or 3 1 2 2 x If the main axis is at I and III quadrant 0 must be in the range of 2 3 or 1 3 x 2 Protek Test amp Measurement 3 9 Example 7 Triggering on a Video Signal You a
11. of Press RUN Key Three Times to Exit The Test gt gt to exit the test Protek Test amp Measurement 2 48 Probe comp frequency The voltage of signal for Probe Comp is about 5V and you can adjust its frequency to IKHz 2KHz and 6KHz according to the following steps Press UTILITY gt Probe Comp Frequency and press softkey to set the frequency p Freq Language The oscilloscopes have a user interface of two languages Simplified Chinese and English And the user could set it Press UTILITY gt Language to select the language NOTE The menus and the prompt messages will both be changed into the language you selected Protek Test amp Measurement 2 49 How to Measure Automatically The automatic measurement capability of the oscilloscope makes voltage and time measurements easy Figure 2 41 shows the menu key for automatic measurements on the front panel Menu for Auto Measure STORAGE Figure 2 41 DISPLAY UTILITY C C Press the MEASURE key to display the menu for the settings of the Automatic Measurements The oscilloscopes provide 15 parameters of auto measurement including Vpp Vmax Vmin Vtop Vbase Vaverage Vrms Frequency Period RiseTime FallTime Width Width delay 1 22 f and delay 1 52 t The selections for these parameters are divided into 6 pages to display You can press the softkey Type to select these pages Page 1 for voltage measurements Figure 2 42 Table 2
12. persistence to a specific time With persistence on you can simulate the function of an analog storage oscilloscope Average Acquisition Apply averaging to your signal to remove uncorrelated noise and improve measurement accuracy Reduces random or uncorrelated noise in the signal display The averaged waveform is a running average over a specified number of acquisitions from 2 to 128 This mode is only available when Fast trigger is ON Envelope Use envelope to capture and display the maximum variation of a signal Finds highest and lowest record points over many acquisitions Stopping the Acquisition While acquisition is running the waveform display is live Stopping the acquisition freezes the display In either mode the waveform display can be scaled or positioned with the vertical and horizontal controls Protek Test amp Measurement 2 36 The waveform displayed on the screen will change in conjunction with the setting of menu a CHi 5 i sampling e Rc RENE Fersistence VELETEFEEE TN OG GG GG g grgrrgrirgraegrag TRI r r E Mal CHI BENI Time 100 0ns Figure 2 24 Signal that contains noise and without average sampling TuS 75 sampling P T E EA Fersistence 1 311131 i PEPrrrrrrrrrrrrrmiirs F P Fie Averages TM CHI BESNBITI Time 100 0ps Figure 2 25 Display signal after average sampling Protek Test amp Measurement 2
13. position in the waveform windows 4 It is a status bar displays the horizontal time base main time base It is a status bar display the trigger s horizontal offset according to the center of the window Protek Test amp Measurement 2 2 Key Points Y T The conventional oscilloscope display format It shows the voltage of a waveform record on the vertical axis as it varies over time on the horizontal axis X Y XY format displays channel 1 in the horizontal axis and channel 2 in the vertical axis Time Div If the waveform acquisition is stopped using the key the Time Div control expands or compresses the waveform Roll Mode Display When the Time Div control is set to 100 ms div or slower and the trigger mode is set to Auto the instrument enters the rolling acquisition mode In this mode the waveform display updates from left to right There is no trigger or horizontal control of waveforms during rolling mode Ultrazoom Use the Ultrazoom to expand a segment of a waveform to see more detail The Ultrazoom time base setting cannot be set slower than the Main time base setting Protek Test amp Measurement 2 22 UltraZoom The Ultrazoom is a magnified portion of the main waveform window You can use Ultrazoom to locate and horizontally expand part of the main waveform window for a more detailed high resolution analysis of signals Waveform needs to be expanded TINE Ulta oori Format Main ti
14. scale of a waveform including MATH and REF The waveform display will contract or expand about the ground level If the Volts Div is set to Coarse the waveform scales in a 1 2 5 step sequence from 2 mV to 5 V If the Volts Div is set to Fine it scales to small steps between the coarse settings When scaling MATH waveform you can change the amplitude with the SCALE knob in a 1 2 5 step from 0 1 to 1000 You can set the vernier by pressing the vertical SCALE knob 3 Youcan adjust the vertical position and scale only when the waveform is selected 4 When you change the vertical position the position message is displayed on the bottom left of the screen Protek Test amp Measurement 2 19 Understand the Horizontal System The oscilloscope shows the time per division in the scale readout Since all active waveforms use the same time base the oscilloscope only displays one value for all the active channels except when you use Ultrazoom You can use the horizontal controls to change the horizontal scale and position of waveforms The horizontal center of the screen is the time reference for waveforms Changing the horizontal scale causes the waveform to expand or contract around the screen center Horizontal position changes the point relative to the trigger where the waveform appears on the center of the screen The Horizontal Knobs POSITION The horizontal POSITION knob adjusts the horizonta
15. signal has positive going sync pulses use the Inverted Polarity selection HF Reject Use HF Reject to block the high frequency components in the video signal Protek Test amp Measurement 2 31 The figure 2 20 and 2 21 display the waveforms with Line and Field synchronization vided TRIGGER y AALA BARPA RARAN Thi T oben TTT TE F NOM AUN tilia nma MES amy Time c00 Drs Figure 2 20 Line synchronization Tvi deo RIGGER Pil BENI I Vd NI ili MEC bey EE PED E wer Fr EG G9 OG 31g 0 E IE uc Figure 2 21 Field synchronization Protek Test amp Measurement 2 32 Trigger Key Points 1 Source You can derive your trigger from various sources Input channels CH1 or CH2 AC Line Ext Ext 5 CH1 or CH2 The most commonly used trigger source is any one of the input channels The channel you select as a trigger source will function whether it is displayed or not Ext and Ext 5 You can use this trigger source when you want to acquire data on two channels and trigger from a third For example you might want to trigger from an external clock or with a signal from another part of the test circuit The Ext and Ext 5 trigger sources both use the external trigger signal connected to the EXT TRIG connector Ext uses the signal directly you can use Ext on signals with a trigger level range of 1 6 V to 1 6 V The EXT 5 trigger source divides the signal by 5 which extends the trigge
16. signals Settings for Edge Trigger The Slope and Level controls help to define the trigger The Slope control determines whether the oscilloscope finds the trigger point on the rising or the falling edge of a signal To access the trigger slope control press the key select Edge and use the Slope button to select Rising or Falling Table 2 13 Rising Select to trigger on either the rising or falling edge of Slope Falling the signal Select the input source as the trigger signal Source Select the type of triggering Mode Selects the components of the trigger signal applied to the trigger circuitr Couple LF Reject i HF Reject Protek Test amp Measurement 2 30 Settings for Video Trigger Choose video triggering to trigger on fields or the lines of an NTSC PAL or SECAM standard video signal Table 2 14 Selects the input source as the trigger signal POM EXT and EXT 5 use the signal applied to the EXT TRIG connector as the source Normal Normal triggers on the negative edge of the Pobity polarity Lp sync pulse and Inverted triggers on the positive Inverted edge of the sync pulse polarity db Select to trigger on lines eyne Field 1 Field 2 Select to trigger on Field 1 or Field 2 ON Set to reject high frequency aaah OFF Close the high frequency reject function Key points Sync Pulses When you choose Normal Polarity the trigger always occurs on negative going sync pulses If your video
17. you need to measure is already displayed on screen Memory position at limit Prompting that the Mem Offset 1s at the full range of the memory No active cursor Prompting that you haven t set the cursor source while using the Track cursor measurements No signal found Prompting that there is no signal connected to the instrument or the signal is out of the AUTO range for detecting while pressing the key No zoom at this Time Div Prompting that under some timebases or X Y mode the Ultrazoom function is not available Position at limit Prompting that the channel offset is at limit while turning the vertical POSITION knob to adjust the vertical position of the channel Real TimeDiv at limit Prompting that the timebase is up to the highest horizontal resolution under the Real Time sampling mode Sampling at limit Prompting that the sampling rate is at limit under the X Y mode Save finished Prompting that the storage progress finished Time Div at limit Prompting that the Time Div is at limit while turning the horizontal SCALE knob to adjust timebase The storage is empty Prompting that current position of the memory is empty for waveforms or settings saved Protek Test amp Measurement 4 Trigger level at limit Prompting that the trigger level is at limit while turning the LEVE knob Trigger position at limit Prompting that the trigger position is at the start or the end point of the memory while turni
18. 1 BNC push to connect and twist to the right to lock the probe in place Attach the probe tip and reference lead to the PROBE COMP connectors Figure 1 5 Protek Test amp Measurement Probe comp Figure 1 6 2 Set the probe attenuation to 10X To do this push CH1 gt Probe gt 10X CHI Coupling BW Linut Biz 15880 Wo lts B i Probe 1X amp Probe attenuation Figure 1 7 3 Push the button Within a few seconds you should see a square wave in the display approximately 5 V at 1 kHz peak to peak Protek Test amp Measurement 1 7 rape uc CE E D E a D D Figure 1 8 4 Push the key to turnoff channel 1 push the key to turn on channel 2 repeat steps 2 and 3 Protek Test amp Measurement 1 8 To compensate probes Perform this adjustment to match your probe to the input channel This should be done whenever you attach a probe for the first time to any input channel 1 Set the Probe menu attenuation to 10X Set the switch to 10X on the probe and connect the probe to channel 1 on the oscilloscope If you use the probe hook tip ensure a proper connection by firmly inserting the tip onto the probe Attach the probe tip to the PROBE COMP connector and the reference lead to the PROBE COMP Ground connector turn on channel 1 and then press A
19. 2 EN as 300 2400 4800 9600 19200 or 38400 GPIB Address Set the GPIB address from 0 GPIB to 30 steps 1 Address NOTE e Before install or uninstall the extension module you must confirm that the oscilloscope powers off e You could find more details in the user manual for extension module Protek Test amp Measurement 2 47 Self test Press UTILITY Self Test to enter the following menu Figure 2 40 Table 2 22 Execute the screen test program SELF TEST SCHEEN Te st Screen Test Keyboard Test Execute the keyboard test program Feyooard Test 1 Screen Test Press softkey to select Screen Test and begin the screen test procedure Fellow the prompt message on the screen Press RUN Key to Continue the Test The screen turns red green and blue in sequence when pressing the RUN STOP key You could check the screen for color or other display failures 2 Keyboard Test Press softkey to select Keyboard Test and start the keyboard test routine The white boxes represent the buttons on the front panel the rectangular boxes with two arrows beside represent the knobs on the front panel the square boxes represent the pressing function for the knobs Test all keys and knobs and look the boxes on the screen response whether or not NOTE e The boxes will turn red while test the keys and knobs and they will turn green after tested e You could follow the prompting message
20. 23 io t CHI Select CH1 or CH2 as source channel Source CH2 for measurement ype None Go to the page to clear measurements Voltage Select to measure voltage parameters Type 1 3 on page Vm Measure Vpp ofthe signal wa Measure Vmin of the signal Protek Test amp Measurement 2 50 Page 2 for voltage measurements Figure 2 43 Table 2 24 IER Settings Source CHI Select CH1 or CH2 as source channel Source CH2 for measurement pe None Go to the page to clear measurements TE Voltage Select to measure voltage parameters i 2 3 on page 2 Vtp Measure Vtop of the signal Vbae Measure Vbase of the signal Average Measure Vaverage of the signal Page 3 for voltage measurements Figure 2 44 Table 2 25 sida CHI Select CH1 or CH2 as source channel Source CH2 for measurement Mas None Go to the page to clear measurements Voltage Select to measure voltage parameters T Lype 3 3 on page 3 Vms Measure Vrms of the signal Protek Test amp Measurement 2 51 Page 1 for time measurements Figure 2 45 Table 2 26 MEASURE Source Menu Source Fall Tire Page 2 for time measurements Figure 2 46 Table 2 27 Settings CH1 CH2 None Time 1 3 Comments Select CH1 or CH2 as source channel for measurement Go to the page to clear measurements Select to measure time parameters on page 1 Measure Frequency of the signal Measure RiseTime of the signal
21. 3 Add source A to source B Subtract source B from source A Operation Multiply source B by source A Source A divided by source B Fast Fourier Transform 5 Define CH1 or CH2 as source A CHI source B CH2 Define CH1 or CH2 as source B invert ON Set ON to invert the MATH waveform OFF Restore to original display of the waveform You can change the amplitude with the SCALE knob in a 1 2 5 step from 0 1 to 1000 And the scale will be displayed on the status bar TRES eee Figure 2 10 MATH scale rarer Pit n Pereos oszze 1 CHi i tmwv ON Ti ime 1 000Qus me 400 6 Protek Test amp Measurement 2 9 Using the FFT The FFT process mathematically converts a time domain signal into its frequency components FFT waveforms are useful in the following applications e Testing impulse response of filters and systems e Measuring harmonic content and distortion in systems e Characterizing noise in DC power supplies e Analyzing vibration e Analyzing harmonics in 50 and 60 Hz power lines There are five steps to using the FFT 1 Set up the source time domain waveform 2 Display the FFT waveform 3 Select the FFT window type 4 Adjust the sample rate to display fundamental frequency and harmonics without aliasing 5 Use cursors to measure the FFT waveform Setting Up the Time Domain Waveform It is important to correctly set up the time domain YT waveform to produce a useable FFT waveform Follow these s
22. 37 Note e Choose Realtime acquisition to observe the single shot or pulse and select the Equ Time to observe high frequency periodic signal e To reduce the display of the random noise please choose the Averages Acquisition And this mode would make the screen refresh rate slow e To reduce the signal confusion select Envelope Acquisition T P m pid Pl NEN ls i LL iM Ll l D Figure 2 26 Signal with Envelope Acquisition The envelope is shown as the figure above and the signal is displayed with the diagonal between the envelopes Protek Test amp Measurement 2 38 To use roll mode Roll mode continuously moves data across the display from left to right It allows you to see dynamic changes like adjusting a potentiometer on low frequency signals Two frequently used applications are transducer monitoring and power supply testing The oscilloscope is now untriggered and runs continuously You can also make automatic measurements in the roll mode Notice that the oscilloscope briefly interrupts the moving data while it makes the measurement The acquisition system does not miss any data during the measurement The slight shift in the display after the measurement is complete is that of the display catching up to the acquisition system Roll mode operating hints Roll mode operates on channels and 2 only Roll mode is available at time base up to 100 ms div Protek Test amp Measurement
23. A Turn the horizontal POSITION knob to move Cursor B Protek Test amp Measurement 2 60 3 Auto Measure mode Figure 2 54 Table 2 33 Display the cursors applied by Tylode Auto the current automatic measuring Measure See the following figure CURSOR IvInde Hi Oa Figure 2 55 Auto Measure Mode of Cursor Measurement 4 Clear Cursors You could press softkey as CURSOR Mode gt OFF to erase the cursor readings and removes the cursors from the display Protek Test amp Measurement 2 61 How to use instant execute keys The action keys include AUTO autosetting and RUN STOP run stop The feature automatically adjusts the controls to produce a usable display of the input signal Pushing AUTO adjusts or sets each of the following items listed Table 2 34 Function Settings sampling mode Equ sampling Vere caleoupling a to AC or DC according to the Horizontal position Trigger type Edge Measure the channel with input signal Trigger source automatically Trigger voltage Midpoint setting IPOS knob Memory offset RUN STOP Start or stop the waveform acquiring Protek Test amp Measurement 2 62 Chapter 3 Application amp Examples Example 1 Taking Simple Measurements You need to see a signal in a circuit but you do not know the amplitude or frequency of the signal You want to quickly display the signal and measure the frequency period and peak to peak am
24. Hanning Window 2 14 HE RejeCt noa cose Pret 2 31 2 34 HOtIzOollfalkc nes eoe bobine 6 3 Horizontal Calibration 2 46 Horizontal Knobs 2 20 Horizontal Menu 2 20 Horizontal System 1 13 2 20 I DO Se BUD oes potio p eb es 2 47 HDULS esteem sata EE ENE come 6 Instant Execute Key 2 62 eE a E E pea eds 1 12 Invert a wave Toii sioe mb 2 8 K Keyboard Test enero hotte 2 48 3 IA SUAS aa A EE 2 49 EEN Th Pm 2 29 ERREG CO ast tance eese bool bodie 2 34 TOA e Meaalecccncetes Maelreccunettee 2 42 M huir nS 2 0 MEASURE rage sceau seit 2 50 IVICASUtCTHe DIS o hoe desteettdeutele biu duriuuE 6 4 Mem OPES oesoem eda T 1 14 N Normal Trigger 43s oci e bns 2 34 Nyquist Frequency 2 13 O 6 oh cl udis Ui ore nee 2 18 OPON Sicana Sur du ru atu Su AUN esters III F Persisto ll O ocssscudutiecub sanat niuDAsEA 2 36 LONG dettes ete ueniet iie AE 6 5 Pret BED stolis tute bed asbestos 2 34 BROODS Coscedtecoc cootra eu term cbe Eae Cu Per cb ed 6 3 Probe Attenuation suus 2 7 Probe Compensation 1 9 2 49 Probe Compensator 6 5 Prompting messages sssus 4 R Rando NOISe e cos e tet es ed 3 4 Realtime Sampling 2 36 Rectangle Window 2 14
25. Measure FallTime of the signal Psi Settings oree Source Select CH1 or CH2 as source channel for measurement Go to the page to clear measurements Type Time Select to measure time parameters on YP 2 3 page 2 Period Width Width Protek Test amp Measurement Measure Period of the signal Measure Width of the signal did L Measure Width of the signal 2 52 Page 3 for time measurements Figure 2 47 Table 2 28 ndn Settings d Select CH1 or CH2 as source CHI channel for measurement Source CH2 wpe Go to the page to clear None measurements Type Time Select to measure time parameters Jp 3 3 on page 3 Delayl gt 2 Measure the signals delay between two channels at the rising edge Measure the signals delay between ia Sai ra two channels at the falling edge NOTE The results of the automatic measurements will be displayed on the bottom of the screen and the oscilloscope can display 3 results at the same time The oscilloscopes use rolling mode to display the results If there are 3 results on the screen the next measurement will make previous results moving left so that the leftmost data on the screen will be cleared Protek Test amp Measurement 2 53 Using Automatic Measurement as the following steps demonstrate k Select the signal channel for measuring You could select CH1 or CH2 according to the signal channel you interest Press softkeys as follows
26. Pressing the AUTO key 2 Adjust the vertical and the horizontal scale by turning the SCALH knobs to appropriate ranges for display 3 Press the key to select CHI and turn the vertical POSITION knob to adjust the vertical position of CH1 s waveform 4 Press the key to select CH2 and turn the vertical POSITION knob to adjust the vertical position of CH2 s waveform 2 Measure the delay after the signal through the circuit Auto measuring the delay Pressing MEASURE gt Source gt CH1 to set measurement source Pressing Type gt Time 1 3 to select measurement page Pressing Delayl gt 2 to display the result on the screen Coupling JEW Limit E eens Pee 3 ESSE d uL uu h i N p L NE i EI BW 1 GG Vo lta ID lv Eragaaaggrgraggrrragrrrrr i J L LLALL LLL LLL CHi1 Somy LH zo oom Time 100 Gus Figure 3 1 Delay of the signals Protek Test amp Measurement 3 2 Example 3 Capturing a Single Shot Signal To capture a single event you need previous knowledge of the signal in order to set up the trigger level and slope For example if the event is derived from TTL logic a trigger level of 2 volts should work on a rising edge The following steps show you how to use the oscilloscope to capture a single event 1 Connect a signal to the oscilloscope 2 Set up the trigger e Press the key in the Trigger control area to display the menu e Press softkey to select Edge
27. UTO 2 Check the shape of the displayed waveform iB RN No i W Pa oS Lz Overcompensated Compensated correctly Undercompensated Figure 1 9 3 Ifnecessary use a nonmetallic tool to adjust the trimmer capacitor on the probe for the flattest pulse possible as displayed on the oscilloscope 4 Repeat as necessary Protek Test amp Measurement 1 9 To display a signal automatically The oscilloscope has an Auto feature that automatically sets up the oscilloscope to best display the input signal Using Auto requires signals with a frequency greater than or equal to 50 Hz and a duty cycle greater than 1 When you press the AUTO key the oscilloscope turns on and scales all channels that have signals applied and it selects a time base range based on the trigger source The trigger source selected is the lowest numbered input that has a signal applied The 6800 series are two channel oscilloscopes with an external trigger input In this exercise you connect a signal to the channel 1 input To avoid damage to your new oscilloscope make sure that the voltage level of the signal you are using 1s less than or equal to 400 V dc plus peak ac For a complete list of the characteristics see chapter 6 Performance Characteristics 1 Connect a signal to the oscilloscope 2 Press AUTO When you press the AUTO key the oscilloscope changes the front panel setup to display the signal It automatically a
28. User Manual March 2005 6800 Series Digital Storage Oscilloscope 6810 6806 6804 O Copyright Protek Test amp Measurement 2005 All Rights Reserved Copyright Protek Test amp Measurement 2005 All Rights Reserved Protek products are covered by P R China and foreign patents issued and pending Information in this publication supercedes that in all previously published material Specification and price change privileges reserved Protek Test amp Measurement General Purpose Oscilloscopes The Protek 6800 Series Digital Storage Oscilloscopes offer exceptional waveform viewing and measurements in a small lightweight package The 6810 6806 and 6804 are suited for production field service research and design labs applications involving digital circuit test and troubleshooting and education applications Each of these oscilloscopes gives you e 100 MHz bandwidth 6810 60 MHz bandwidth 6806 40 MHz bandwidth 6804 e 16K Channel Memory Depth e 100MS s Real time Sample Rate on all Channels e 10GS s equivalent Sample Rate e Automatic setup of the front panel e Automatic and cursor measurements of frequency time and voltage e Auto Calibration e Waveform storage e Save and recall of 5 front panel setups e XY PLOT e Built in FFT function e Dual Language User Interface English Chinese These oscilloscopes are easy to use with familiar controls and high display update rate but with none of the viewing problems that a
29. at 8 kHz Use LF Reject to remove low frequency signals such as power line noise from the trigger path Protek Test amp Measurement 3 4 3 Use averaging to reduce noise on the displayed waveform To use averaging follow these steps e Press softkey as ACQUIRE gt Acquisition gt Average e Toggle the Averages softkey to select the number of averages that best eliminates the noise from the displayed waveform The higher the number of averages the more noise that is removed from the display However the higher the number of averages the slower the displayed waveform responds to waveform changes You need to choose between how quickly the waveform responds to changes and how much noise there is on the signal See Figure 3 3 a io 4 Persistence PEPPPrrrrriigea f p n TENET ee er LILI E eel et A a m a a a a Ar Ea raa a a E T 2010 mY Time 100 0us Figure 3 3 Protek Test amp Measurement 3 5 Example 5 Taking Cursor Measurements You could measure 15 parameters automatically with the oscilloscope These parameters also can be measured using cursors You could use the cursors to quickly take time and voltage measurements on a waveform Measuring Ring Frequency To measure the ring frequency at the rising edge of a signal do these steps 1 Press key to see the Cursor menu 2 Press softkey to select Cursor Mode as Manual 3 Press softkey to select Cursor Type as Time 4 Use th
30. ations of Cursor Measurements 1 Manual Mode Figure 2 52 Table 2 29 CURSOR tk Settings Comments wode Set to Manual mode in cursor measurement Voltage Use cursors to measure the voltage Type parameters of the signal Time Use cursors to measure the time parameters of the signal CHI Select the measurement source of the Source CH2 signal MATH In this mode the oscilloscope measures the cursors coordinate values for voltage or time and the increment between the two cursors Measuring to do these steps as follows 1 Select the Manual mode for cursor measurement by pressing softkey as CURSOR Mode gt Manual 2 Select channel Source for measurements by pressing softkey as CURSOR gt Source gt CH1 CH2 or MATH NOTE While measuring the channel of MATH the results are valued with d division as units 3 Select the cursors type by pressing softkey as CURSOR Type gt Voltage or Time 4 Move the cursors to adjust the increment between the cursors Details in Table 2 28 Table 2 30 Cursor Increment Operation Ciccone Voltage Turn the vertical POSITION knob to move Time cursor A ea Voltage Turn the horizontal POSITION knob to Time move cursor B Protek Test amp Measurement 2 58 Key Points Voltage Cursors Voltage cursors appear as horizontal lines on the display and measure the vertical parameters Time Cursors Time cursors appear as vertical
31. axis waveform Time value for Y axis waveform AutoMeasure Cursors are visible for Automatic Measurement AutoMeasure Vpp Vmax Vmin Vtop Vbase Vavg Vrms Freq Period Rise Time FallTime Width Width Delay1 gt 2 Delay1 gt 2 t Protek Test amp Measurement 6 4 General Specifications Display Display Type 5 7 in 145 mm diagonal liquid crystal Display Resolution Display Color Display Contras Backlight Intensity typical Probe Compensator Output Output Voltage typical 5 V into gt 1 MQ load Frequency typical IKHz 2KHz 6KHz Source Voltage 100 240 Vrms 10 from 45Hz through 440Hz CATII Less than SOW ZA T rating 250 V Environmental Operating 10 C 40 C Nonoperating 20 C 60 C Convection 40 C 50 C lt 60 relative humidity Altitude Operating 3 000 m Nonoperating 15 000 m Mechanical Size E 350 mm 145 mm 4 5 kg approximate 5 6 kg Adjustment Interval The recommended calibration interval is one year Protek Test amp Measurement 6 5 Appendix B 6800 Series Accessories Standard Accessories Probex2 1 5m 1X 10X Passive Probes The passive probes have a 6MHz bandwidth with a rating of 150V CAT II when the switch is in the 1X position and a 1OOMHz 60MHz 40MHz bandwidth with a rating of 300 V CAT II when the switch is in the 10X position Power Cable that fits the standard of destination country This User Manual User Registration F
32. de if the source signal contains frequencies of interest that are not synchronized with the trigger rate e Do not use Envelope mode with FFT Envelope mode can add significant distortion to the FFT results e For transient impulse one shot signals set the oscilloscope to trigger on the transient pulse in order to center the pulse information in the waveform record e To display FFT waveforms with a large dynamic range use the dBVrms scale The dBVrms scale displays component magnitudes using a log scale expressed in dB relative to 1 Vrms where 0 dB 1 Vrms or in source waveform units such as amps for current measurements e To display FFT waveforms with a small dynamic range use the Vrms scale The Vrms scale lets you display and directly compare components with similar magnitude values Nyquist Frequency The highest frequency that any real time digitizing oscilloscope can measure without errors is one half the sample rate This frequency 1s called the Nyquist frequency Frequency information above the Nyquist frequency is undersampled causing a situation known as aliasing Protek Test amp Measurement 2 13 Selecting an FFT Window The 6800 series oscilloscopes provide four FFT windows Each window is a trade off between frequency resolution and amplitude accuracy What you want to measure and your source signal characteristics help determine which window to use Use the following guidelines to select the be
33. djusts the vertical and horizontal scaling as well as the trigger coupling type position slope level and mode settings Protek Test amp Measurement 1 10 To set up the vertical window Figure 1 10 shows the channels math ref off keys and vertical position scale knobs The following exercise guides you through the vertical keys knobs and status bar It will help you be familiar with the setting of the vertical parameters VERTICAL Figure 1 10 1 Center the signal on the display with the POSITION knob The knob moves the signal vertically and it is calibrated Notice that as you turn the knob a voltage value is displayed for a short time indicating how far the ground reference is located from the center of the screen Also notice that the ground symbol on the left side of the display moves in conjunction with the knob Measurement hints If the channel 1s dc coupled you can quickly measure the dc component of the signal by simply noting its distance from the ground symbol If the channel is ac coupled the dc component of the signal is removed allowing you to use greater sensitivity to display the ac component of the signal Protek Test amp Measurement 1 11 2 Change the vertical setup and notice that each change affects the status bar differently You can quickly determine the vertical setup from the status bar in the display e Change the vertical sensitivity with the knob and notice that it causes t
34. e 2 31 shows the menu button for the Utility on the front panel MENU MEASURE STORAGE Fi gure 2 3 1 DISPLAY UT ILITY Utlity function setting Press the UTILITY key to pop up the menu for the settings of the Utility system Figure 2 32 Table 2 18 E EIE Vertical System Calibrate the Vertical System Calibration automatically Horizontal System Calibrate the Horizontal System Li Setup Calibration automatically n GPIB Address Set the GPIB address KHz 1 KHz Set the frequency of Probe oU Rie Comp at 1 KHz 2 KHz or 6 Self Test Frequency 6 KHz KHz Dem Self Test Screen Test Execute the screen test BE Keyboard Test Execute the keyboard test Simplified Set the system displays in T Chinese simplified Chinese Set the system displays in English English Protek Test amp Measurement 2 43 Auto Calibration The Auto Calibration adjusts the oscilloscope to get the best accuracy Use these functions to calibrate the oscilloscope s vertical and horizontal systems For maximum accuracy at any time run the routine if the ambient temperature changes by 5 C or more Before you run the procedure do these steps 1 Disconnect any probes or cables from the channel inputs otherwise failure or damage to the oscilloscope may occur 2 Push the UTILITY key to select Self Cal The self calibration menu is displayed as Figure 2 33 Figure 2 33 Table 2 19 A Ve rhcal Vertical System Select to run the vertical s
35. e knobs are used most often and are similar to the knobs on other oscilloscopes The keys bring up softkey menus on the display that allow you access to many of the oscilloscope features and menus associated with channels math and reference or instant action features Figure 1 1 6800 Series Oscilloscope s Front Panel 6800 series oscilloscopes provide an easy to use front panel the definitions of the keys and the knobs are listed as follows Menu keys Associate with MEASURE CURSOR ACQUIRE DISPLAY STORAGE and UTILITY menus Vertical keys Associate with CHI CH2 MATH and REF menus the OFF key can set waveform which currently active off Horizontal key Associate with horizontal menu Trigger keys Associate with trigger menu instant action to set 50 trigger level and force trigger Action keys Include Instant action keys for AUTO and RUN STOP Protek Test amp Measurement 2 Function keys Five gray keys from top to bottom on the right to the screen which set choice of operation in the currently active menu Knobs For the adjustment of vertical or horizontal position scale and trigger level Menu keys MENU MEASURE A IRE STORAGE L RUN STOP CURSOR DISPLAY UTILITY m Instant action keys Trigger control Function Horizontal control Vertical control EXT trigger input Signal input channel ProbeCompensator Figure 1 2 Front Panel
36. e measured over the entire waveform The value used as 100 Calculated using either the min max or the histogram method Measured over the entire waveform The value used as 096 Calculated using either the min max or the histogram method Measured over the entire waveform The arithmetic mean over the entire waveform The true Root Mean Square voltage over the entire waveform Protek Test amp Measurement 2 55 The automatic measurement of the time parameters The 6800 series oscilloscopes provide time measurements including Frequency Period RiseTime FallTime Width Width Delay 1 22 and Delay 1 22 t Figure 2 50 shows a pulse with some of the time measurement points RiseTime FallTime 90 50 10 4 Width p Width 4 l Figure 2 50 RiseTime Time that the leading edge of the first pulse in the waveform takes to rise from 10 to 90 of its amplitude FallTime Time that the falling edge of the first pulse in the waveform takes to fall from 90 to 10 of its amplitude Width Measurement of the first positive pulse in the waveform The time between the 50 amplitude points Width Measurement of the first negative pulse in the waveform The time between the 50 amplitude points Delay1 gt 2 f Measurement of the delay between the two channels at the rising edge Delay1 gt 2 t Measurement of the delay bet
37. e shot BandWidth Bandwidth Limit typical Rise Time at BNC typical lt 3 5ns 6810 lt 5 8ns 6806 lt 8 8ns 6804 DC Gain Accuracy 2mV div SmV div 4 Sample or Average acquisition mode gt 10mV div 3 Sample or Average acquisition mode DC Measurement Accuracy Average of 216 Waveforms with vertical position at Average Acquisition Mode Zero 4 xreading 0 1div lmV at 2mV div or 5mV div Xx 3Voxreading 0 1 div 1 mV at settings 210mV div n 2 Average of 216 Waveforms with vertical position not at zero t 39ox reading vertical position 1 of vertical position 0 2div Add 2mV for settings from 2mV div to 200 mV div Add 50mV for settings from 500mV div to 5V div Delta Volts Measurement Delta Volts between any two averages of 216 Accuracy waveforms acquired under same setup and ambient Average Acquisition Mode conditions 3 xreading 0 05 div Protek Test amp Measurement 6 2 Probe 1X position 10X position Bandwidth DC to 6 MHz DC to 100MHz 60MHz 40MHz Attenuation ratio Compensation 1Opf 35pf Oscilloscope with 1M 9 input Range Input resistance IM 9 3294 10M 9 229 DOE Input voltage 150V RMS CAT I or 300V RMS CAT I or 300V DC 150V DC CAT I CAT I 150V RMS CAT II or 300V RMS CAT II or 300V DC 150V DC CAT II CAT II 100V RMS CAT III or 100V RMS CAT III or 100V DC 100V DC CAT III CAT III The probe index of different models is following its attached specification sample Rate
38. e vertical knob to place a cursor on the first peak of the ring 5 Use the horizontal knob to place a cursor on the second peak of the ring You can see the delta time and frequency the measured ring frequency in the Cursor menu CURSOR Mlode a E ee AI a rirararairarioarainairrnaad T b0prL EG GR MN gg 1 Lg opis ppOpopoppE EE E ER ERR ERE EE ERE E ES Pg gj 9 9 pu MEN 1636 Orv Time 100 Qus Figure 3 4 Protek Test amp Measurement 3 6 Measuring Ring Amplitude You measured the ring frequency in the previous example Now you want to measure the amplitude of the ringing To measure the amplitude do these steps 1 Press key to see the Cursor menu 2 Press softkey to select Cursor Mode as Manual 3 Press softkey to select Cursor Type as Voltage 4 Use the vertical knob to place a cursor on the highest peak of the ring 5 Use the horizontal POSITION knob to place a cursor on the lowest point of the ring You can see the following measurements in the cursor menu See Figure 3 5 M The delta voltage peak to peak voltage of the ringing M The voltage at Cursor A M The voltage at Cursor B CURSOR Iode a E b0prLgE GG 311 Figure 3 5 Protek Test amp Measurement 3 7 Example 6 The application of the X Y function Viewing Phase Changes through a Network Connect the oscilloscope to monitor the input and output of the circuit and
39. eeees 2 1 Understand the Vertical Syse aranna ces ede meteo tto E cU cars NU Le UM 2 2 Understand the Horizontal SysteM acs especie apo o porci atero he oett atero iasadan rbi as 2 20 Understand the Trigger Syste seo etri Er PECORE EE EC CEPEDOE EE EPOR XEPEDUE RE EPOR CERE CO REUS 2 29 How to Set Up the Sampling System ssssssseee III 2 35 How to Set Up the Display System ccccccccccccccecccececeeetecececetecececeteceenceteeseeeetecseneeees 2 40 How Save and Recall Waveforms or Setups cccccccccccccccccceeeeeeeeeeeeeeeeeeeseeeeeeeeeeeeeeeeeess 2 41 Howto Se Upe Cy asad NS 2 43 Howto Measure Automatically s e aa IE te UM EM MEE es 2 50 Howto Measure will C UPSOES tietara ean te tede ua bousbainabade een bonnvamesantetuvebunavaels 2 57 How to se Instant Execute Keys uie cioe eor he rto o ERES Pto ERRORES b RRi 2 62 CHAPTER 3 APPLICATION amp EXAMPLES noie diens 3 1 Example 1 Taking Simple Measurements sssss 3 Example 2 Viewing a signal delay through a circuit eeeeeeeeeeeeeeeeeeesese 3 2 Example 3 Capturing a Single Shot Signal esee 3 3 Example 4 To reduce the random noise on a signal s 3 4 Example 5 Taking Cursor Measurements sssssssse I rrr 3 6 Example 6 The application of the X Y function sss 3 8 Example 7 Triggering ona Video Signal ciation E PEE aie lee es 3 10 Protek Tes
40. en on the display First the trigger level 1s displayed at the bottom left of the screen If the trigger is dc coupled it is displayed as a voltage If the trigger is ac coupled or if LF reject was selected it is displayed as a percentage of the trigger range Second a line is displayed showing the location of the trigger level as long as ac coupling or low frequency reject are not selected Protek Test amp Measurement 1 15 2 Change the trigger setup and notice these changes affects the status bar differently Press MENU key in the trigger control area A softkey menu appears on the display showing the trigger setting choices Figure 1 13 displays this trigger menu Press the trigger type key to notice the differences between Edge and Video TEM Press the trigger Slope key to notice the differences between Rising Edge and e Falling Edge Rising Press the trigger Source key to select these five trigger source choices Press the trigger Mode key to select these three trigger mode choices ource Set the Coupling and notice that they affect the waveform display differently NOTE The trigger type slope and source change in conjunction with the SEM status bar on the top right of the screen Figure 1 13 3 Press This key is an action key Every time you press the key the oscilloscope resets the trigger level to the center of the signal 4 Press Press this key starts an acquisition regardless of a
41. ger Source and notice if it 1s set to the channel you use 2 Check the Trigger Type You should use Edge for normal signals and use Video for TV signals 5 After pressing the RUN STOP button the oscilloscope does not display a waveform on screen Check whether the Trigger Mode is set to Normal or Single and the trigger level is out of the signal range or not If yes you should set the trigger level in proper range by turning the knob or pressing the key You could also set the Trigger Mode as AUTO Moreover you could push key to display the waveform on screen Protek Test amp Measurement 4 3 6 After the Acquisition is set to Averages or longer Persistence the waveform refreshes slowly It is normal in these settings 7 The signal is displayed as ladderlike waveform The timebase maybe too slow You should turn the horizontal knob to increase horizontal resolution to improve the display Maybe the display Type is set to Vectors You should set to Dots mode to improve the display Protek Test amp Measurement 4 4 Chapter 5 Support amp Service Warranty Protek warrants that the products that it manufactures and sells will be free from defects in materials and workmanship for a period of three 3 years from the date of shipment from an authorized Protek distributor If a product or LCD proves defective within the respective period Protek will provide repair or replace
42. ger is set up properly it can convert unstable displays or blank screens into meaningful waveforms When the oscilloscope starts to acquire a waveform it collects enough data so that it can draw the waveform to the left of the trigger point The oscilloscope continues to acquire data while waiting for the trigger condition to occur After it detects a trigger the oscilloscope continues to acquire enough data so that it can draw the waveform to the right of the trigger point The trigger control area on the front panel includes a knob and three keys r EVE The knob that set the trigger level The instant executes key setting the trigger level to the vertical midpoint between the peaks of the trigger signal FORCE Starts an acquisition regardless of an adequate trigger signal This button has no effect 1f the acquisition 1s already stopped Nn B 5 El MENU The key that shows the trigger controls menu TEPER Dede Video Slope ore TEE EEES TEUER PET TON j a J EE i Time 100 0ns TL Figure 2 19 Trigger controls Protek Test amp Measurement 2 29 Trigger Types The oscilloscope provides two types of triggers Edge and Video Edge You can use the edge trigger with analog and digital test circuits An edge trigger occurs when the trigger input passes through a specified voltage level in the specified direction Video You can use the video trigger on fields or lines of standard video
43. he status bar to change e Press CHI A softkey menu appears on the display and the channel turns on or remains on 1f it was already turned on e Toggle each of the softkeys and notice which keys cause the status bar to change Channels 1 and 2 have a vernier softkey that allows the knob to change the vertical step size in smaller increments To press Volts Div softkey you can change the step size into Fine or Coarse status e To turn the channel off press key Vernier Shortcut key You can set the vernier not only on the Volts Div item in the or CH2 menus but also by pressing the vertical SCALE knob Invert operating hint When you are triggered on the signal you are inverting the inversion also applies to the trigger signal what was a rising edge now is seemed as a falling edge If the signal has a 50 duty cycle square wave or sine wave the displayed waveform appears not to invert However for signals with a duty cycle other than 50 the displayed waveform does invert as you would expect Protek Test amp Measurement 1 12 To set up the horizontal system Figure 1 11 shows the menu key position and scale knobs of horizontal system The following exercise guides you through these keys knobs and status bar HORIZONTAL POSITIO Posttion gt Figure 1 11 1 Turn the Time Div knob and notice the change it makes to the status bar The horizontal SCALE knob changes the sweep speed in a 1 2 5 step seque
44. ing 1s doubled Notice the changes in the status bar Protek Test amp Measurement 2 24 The 6800 series oscilloscopes have two sampling mode Realtime and Equivalent The realtime sampling will be available at 50 ns div or slower and the equivalent sampling is effective at 200ns div or faster For the time base from 200 ns div to 50 ns div according to different sampling mode the same main time base will get different Ultrazoom resolution In another words the realtime and the equivalent sampling mode have different horizontal resolutions Moreover the Fast trigger status may also results different Ultrazoom resolutions under the same main time base Table 2 9 2 10 2 11 and 2 12 in details Table 2 9 Under the state of the Fast trigger OFF Main time base UltraZoom time base UltraZoom time base Realtime sampling Equivalent sampling Mum je SwiAm OO Sons Ulrazoomnotavalable e 12 5ns 6 25ns Table 2 10 Under the state of the Fast trigger ON Main time base UltraZoom time base UltraZoom time base m BN n sampling 5 0ns INN um 5ns Protek Test amp Measurement 2 25 For the main time base at 500 ns div or slower the oscilloscopes only have Realtime sampling mode Therefore there are only differences between the status Fast trigger ON and OFF And for the main time base at 100 ms div or slower the system enters the Roll Mode Under this mode the Ultrazoom function 1s not available Tab
45. is whether acquisition 1s running or is stopped If a reference waveform is selected scaling and repositioning of the reference waveform operates the same way whether Ultrazoom is turned on or off Note 1 The reference function will not be available in X Y mode 2 You cannot adjust the horizontal position and scale of the reference waveform Protek Test amp Measurement 2 17 Remove Waveforms from the Display The CHI CH2 are channels to input signals The operations for MATH and REF are also regarded as independent channels Press MATH and keys to select these channels to press key to remove the selected waveform from the screen Table2 7 Channel Symbol Selected CH1 Channel 1 CH1 ON OFF No status symbol Selected CH2 Channel 2 CH2 ON CH2 OFF No status symbol Mathematic Selected Math operation ON Math MATH OFF o status symbol Reference Selected Ref waveforms ON REF OFF No status symbol Protek Test amp Measurement 2 18 Using Vertical POSITION and SCALE You can use the vertical controls to display waveforms adjust vertical scale and position and set input parameters 1 Using vertical POSITION knob You can change the vertical position of waveforms including MATH and REF by moving them up or down on the display To compare data you can align a waveform above another or you can align waveforms in superposition 2 Using vertical SCALE knob You can change the vertical
46. l alcohol for more efficient cleaning CAUTION To avoid damage to the surface of the instrument or probes do not use any abrasive or chemical cleaning agents Protek Test amp Measurement 6 7 Index Number D D accusatione ma Meese teeta 1 16 2 29 A AC Couple cesta udo 2 3 AC T MIO se tete eO Peste en sneer 2 33 JACCOSSOPIGS an ossa hu ca dose de oaa de IIL 6 6 AC WIRE get c nein au mds 2 35 ACQUISINION iiie tenis 6 1 AUTO tard sateen tone 1 10 2 62 Auto Calibration usse 2 44 AO TERE c p RERUM 2 33 Automatic Measurement 2 50 Average Acquisition sesss 2 36 B Bandwidth Limiteen 2 4 Blackman Window 2 14 C Channel Coupling 2 3 CIC AMIN gras bins estas eb ud inm 6 7 CURSOR essi o tee 2 57 Cursor Measurements 2 57 3 6 D IE C OUI en enenerenet eee ent er ere 2 3 Display osoaren 6 5 Display System ees 2 40 E Edge THO Cr tox Opa 2 30 ENVElONG adodbeno edu i Reds 2 36 Equivalent sampling 2 36 Protek Test amp Measurement PAG UO eet Eun 2 33 Dd DaetOEV SOLD coca Geo b bo teo m 2 42 Fast WIS Ch eurer eeds 2 36 DEM cues REIN ME UE 2 10 POR CB aet does 1 16 2 29 Font patte kanran 1 2 Functional check 1 6 G GND Coulping sess 2 4 H Hamming Window 2 14
47. l position of all channels and math waveforms The resolution of this control varies with the time base The oscilloscope digitizes waveforms by acquiring the value of an input signal at discrete points The time base allows you to control how often the values are digitized SCALE To adjust the time base to a horizontal scale that suits your purpose use the horizontal SCALE knob The SCALE selects the horizontal time div scale factor for the main or the Ultrazoom time base When Ultrazoom is enabled it changes the width of the window zone by changing the Ultrazoom time base Horizontal Menu Push the horizontal key to display the horizontal menu The settings of this menu are listed in the following table Protek Test amp Measurement 2 20 Table2 8 Enter Ultrazoom mode when set ON Foma 0 Foma 0 Y T Select to enter Y T mode X Y Select to enter X Y mode IPOS Knob Mem Offset Set the horizontal POSITION knob to adjust the trigger s position in memory Trig Offset Set the horizontal POSITION knob to adjust the current window s position in memory a CH Hia TTTTTTTTTTTTTTT ITltraZoam B Seley Ti ime XE i ns Figure 2 16 Status bar and mark for Horizontal control Marks and status bar 1 The mark T represent the current waveform window s position in the memory 2 This mark displays the trigger s horizontal position in the memory 3 This mark displays the trigger s horizontal
48. le 2 11 Under the state of the Fast trigger OFF Main time base 5 0ms 2 5ms 1 25ms 625us 312 5us 156 3us 10 0ms 5 0ms 2 5ms 1 25ms 625us 312 5us 156 3us 20 0ms 10ms 5 0ms 2 5ms 1 25ms 625us 312 5us 50 0ms 25ms 12 5ms 6 25ms 3 125ms 1 563ms 781 3us Protek Test amp Measurement 2 26 Table 2 12 Under the state of the Fast trigger ON Protek Test amp Measurement 2 27 X Y Format This format compares the voltage level of two waveform records point by point It is useful for studying phase relationships between two waveforms This format only applies to channels 1 and 2 Choose X Y display format to display channel 1 in the horizontal axis and channel 2 in the vertical axis The oscilloscope uses the untriggered sample acquisition mode and data displays as dots The sampling rate is from 4 KS s to 100 MS s and the default sampling rate is 1 MS s AUTO Ea Ultra Zoom E P ovp aotiog Preece eee ett uel cada nin 111g 6 3 31g Sa 10 G0MHz Figure 2 18 X Y display format The following modes or functions will do not work in X Y format B The Automatic Measurements B The Cursor Measurements REF and MATH Operations The Ultrazoom Mode The Vector Display Mode Horizontal POSITION knob Trigger Controls Protek Test amp Measurement 2 28 Understand the Trigger System The trigger determines when the oscilloscope starts to acquire data and display a waveform When a trig
49. lines on the display and measure the horizontal parameters NOTE Cursors will remain displayed unless turned off after leaving the cursor menu but are not adjustable Protek Test amp Measurement 2 59 2 Track Mode Figure 2 53 Table 2 31 CURSOR E s MALI dines Set to Track mode in cursor measurement CHI Fre Set Cursor A in conjunction with CHI _ Ursor A iso d CH2 or turn off Cursor A Cinsor B Cursor B gt Set Cursor B in conjunction with CH1 None CH2 or turn off Cursor B Cur Ax Display X or Y axes You can switch the Cur Ay values of Cursor A values display of Cursor A and B by pressing the key Cur B Display X or Y Uur bx a Md e beside the values Cur By values of Cursor B Display the X axis AX increment and its You can switch the 1 AX reciprocal between values of X axis the cursors and Y axis by Display the Y axis pressing the key AY increment between beside the values the cursors In cursor track mode the cursors move together with the waveform selected Measuring to do these steps as follows 1 Select the Track mode for cursor measurement by pressing softkey as ICURSOR gt Mode gt Track 2 Select channel Source for Cursor A and Cursor B by pressing softkey as CURSOR gt Cursor A or Cursor B gt CH1 CH2 or None 3 Move the cursors to adjust the positions of the cursors Details in Table 2 30 Table 2 32 Turn the vertical POSITION knob to move Cursor
50. lloscope Chapter 2 Operating your oscilloscope This chapter introduces how to operate 6800 Series oscilloscope in detail Chapter 3 Application amp Examples This chapter is a series of exercises and examples that guide you through the operation of the oscilloscope Chapter 4 Prompting messages and Troubleshooting This chapter gives solutions to frequently encountered problems or failures when testing And it lists all the system prompting messages and their meanings Chapter 5 Support amp Service This chapter contains the service information for the oscilloscope Chapter 6 Reference This chapter lists the characteristics of the oscilloscope Protek Test amp Measurement IV General Purpose Oscilloscope Sinnani aue uU ADF E M E M MEME II MOI MEME D RM OMM RM URN RR M CET IV CHAPTER 1 gt THE OSCILLOSCOPE AT A GLANCE 2 intent 1 1 The front panel and the user interface utei ost a 1 2 TO APS POC tied ris CRIN CIN oes ot eese eee eri ELE tc REI e REI e ELS e RE I e us 1 5 Tocotipensdte DEODGS queis dim m a RR IRURE URN SAURAUR DURS UN OUR UN DNURG A 1 9 Toeisplay a sienal automaticaly eenas eb Giese aac erage 1 10 To setup the vertical wind wn ai n ot ot Pet te tia 1 11 iLosetup ahe horizontal systethiz eee be eer heb o eee re Eh Rb ote b tno eon Ew Gerber Eh Eon Corta 1 13 To tte Or the OSCINIOS CONG si oun i panama panama DM M mE E E KL 1 15 CHAPTER 2 OPERATING YOUR OSCILLOSCOPE c cccccccsssssescceeeese
51. me base 20 lus PRrPPrrrrprrrrrrrrrrrrrRerrerertLCMprrrrrrrrrrrrrrrrerdtds E H E S E ERR m Jc TRS Ultrazoom time base aS El dl J PSE ee ee E e at a ee N E E O E A E E O E E A CHi 20 mY Time z0 ELTE Waveform expanded after zoom Figure 2 17 Ultrazoom window The following steps show you how to use Ultrazoom 1 Connect a signal to the oscilloscope and obtain a stable display 2 Press horizontal MENU Ultrazoom ON or press horizontal SCALE knob to enter Ultrazoom mode The screen divides in half The top half displays the main waveform window and the bottom half displays an expanded portion of the main waveform window This expanded portion of the main window is called the Ultrazoom window Two transparent blue blocks shadow the top half the portion unshadowed is expanded in the lower half The horizontal and SCALE knobs control the size and position of the Ultrazoom The symbol in the middle of the screen is the main time base and the symbol on the center bottom is the Ultrazoom time base Protek Test amp Measurement 2 23 e You can use the horizontal POSITION knob to change the position of the expanded portion e You can turn the horizontal SCALE knob to increase the Ultrazoom s resolution e To change the main time base you must turn off the Ultrazoom mode e Since both the main and Ultrazoom are displayed there are half as many vertical divisions so the vertical scal
52. ment as described in the complete warranty statement To arrange for service or obtain a copy of the complete warranty statement please contact your nearest Protek sales and service office Contact Protek Product Support For questions about using Protek measurement products contact Tel 201 760 9898 Fax 201 760 9888 9 00 AM 5 00 PM EST Or contact us by e mail support protektest com For a listing of Protek Distributors visit our web site Web site www protektest com Protek Test amp Measurement 5 1 Chapter 6 Reference Appendix A Specifications All specifications apply to the 6800 Series Digital Oscilloscopes and a probe with the Attenuation switch set to 10X unless noted otherwise To meet specifications two conditions must first be met The instrument must have been operating continuously for twenty minutes within the specified operating temperature You must perform the Self Cal operation accessible through the Utility menu if the operating temperature changes by more than 5 C All specifications are guaranteed unless noted typical Specifications Acquisition Rate 100 MS s 10GS s Averages N acquisition all channels simultaneously N is selectable from 2 4 8 16 32 64 and 128 Time delay between channel typical Protek Test amp Measurement 6 1 Digitizers VOLTS DIV Range Position Range Analog BandWidth 100MHz 6810 60MHz 6806 40MHz 6804 Singl
53. n adequate trigger signal This button has no effect if the acquisition is already stopped Protek Test amp Measurement 1 16 Chapter 2 Operating your oscilloscope By now you get a brief understanding with the VERTICAL HORIZONTAL and TRIGGER groups of the front panel keys You should also know how to determine the setup of the oscilloscope by viewing the status bar This chapter takes you through all groups of front panel keys knobs and menus You will also add to your knowledge of the operation hints by reading this guide We recommend you perform all of the following exercises so you become familiar with the powerful measurement capabilities of the oscilloscope This chapter covers the following topics B Understand the vertical system B Understand the horizontal system B Understand the trigger system B How to set up the sampling system B How to set up the display system B How to save and recall waveforms or setups B How to set up utility B How to measure automatically B How to measure with cursors B How to use instant execute keys Protek Test amp Measurement 2 Understand the vertical system settings of the channels Each channel of 6800 has an operation menu and it will pop up after pressing CH or CH2 key The settings of all items in the menu are shown in the table below Table2 1 AC Coupling pas ON Coarse Volts Div rang IX Protek Test amp Measurement AC blocks the DC compone
54. nce and the value 1s displayed in the status bar The time base ranges of the 6800 series are listed as follows 6810 6806 6804 from 5 ns div to 5 s div and it can reach 2 5ns div in Ultrazoom mode 2 Press the MENU key to display the TIME menu In this menu you can enter or exit the Ultrazoom mode set the display to Y T or X Y format and set the horizontal POSITION knob to Mem Offset or Trig Offset mode Protek Test amp Measurement 1 13 Horizontal position control Trig Offset In this setting the trigger s position will be changed horizontally when you turn the POSITION knob Mem Offset In this setting the position of current waveform window will be changed horizontally in the memory when you turn the POSITIO knob UltraZoom Shortcut key To press the SCALE knob in the horizontal control area on the front panel is another way to enter or exit Ultrazoom mode and it is equal to the following menu operations IMENU gt Ultrazoom Protek Test amp Measurement 1 14 To trigger the oscilloscope Figure 1 12 is the trigger control area on the front panel it have a trigger level knob and three softkeys The following exercise guides you through these trigger keys knobs and status bar TRIGGER Figure 1 12 1 Turn the trigger Level knob and notice the changes it makes to the display On the 6800 series oscilloscopes as you turn the knob or press the menu key for a short time two things happ
55. ng the horizontal POSITION knob to adjust the trigger offset Volts Div at limit Prompting that the Volts Div 1s at full range while turning the vertical SCALE knob Zoom factor at limit Prompting that it is at the full range of horizontal resolution under the Ultrazoom mode while turning the horizontal SCALE knob Zoom position at limit Prompting that the horizontal position of the zoom window is at limit under the Ultrazoom mode while turning the horizontal POSITION knob Protek Test amp Measurement 4 2 Troubleshooting 1 After the oscilloscope is powered on the screen remains black please inspect the instrument according to the following steps 1 Check the power cable s connection 2 Check the power switch turned on 3 After the inspections above restart the oscilloscope 4 If the problem still remains please contact Protek for help 2 After the signal acquisition the waveform does not appear please check according to the following steps 1 Check the probes connected with the signals 2 Check the probes connected to the channels firmly 3 Check the circuit generates signal on the test point 4 Repeat the acquisition 3 The measurement result is 10 times higher or lower than the value expected Check if the probe attenuation is the same as the channel attenuation 4 If the oscilloscope does not get a stable waveform display please check according to the following steps 1 Check the Trig
56. nt of the input Signal DC passes both AC and DC components of the input signal GND disconnects the input signal Limits the bandwidth to reduce display noise To set OFF will get full bandwidth Selects the resolution of the Volts Div knob Coarse defines a 1 2 5 sequence Fine changes the resolution to small steps between the coarse settings Set this to match your probe attenuation factor to make the vertical scale readout correct Set ON to invert the waveform Restore to original display of the waveform 2 2 1 Channel coupling To use CHI as an example input a signal which 1s a sinewave signal with DC shift Press CH1 gt Coupling gt AC to set CHI s coupling as AC In this setting it blocks the DC component of the input signal The waveform is displayed as Figure 2 1 CHI Coupling Rs E M da NE IVA a e bn Set to AC Coupling E ui pos TEE etaa po jo verra BW Limit ERE CELE S EE o E e ETE 0a Figure 2 1 p Y I EEG YIN UD d Volte 000 ZU NE Ao j Probe moa Bo B 0 c OOB o3 BGB oG B o 3 Boa on Bo B o BOB U Mm OU B8 M 3 BH UN BM s M m 3 3 m s s m m m s m s wi AC status cnl lE mY Time 100 LIES Press CH1 gt Coupling gt DC to set CH1 s coupling as DC In this setting it passes both AC and DC components of the input signal The waveform is displayed as Figure 2 2 CHI Couplinz iet j Ton IN f i 3 Veg tee IN CELL TN iig
57. op up the menu as follows Table 2 15 Menu Figure 2 23 ACQUIRE sampling Real Time i Equ Time O Fast trigger OFF Persistence I Averages Normal Average Envelope Acquisition 16 32 64 128 Averages Protek Test amp Measurement Set to Realtime sampling mode Set to Equivalent sampling mode Set fast trigger ON Set fast trigger OFF The waveform will be kept on the screen for the time you set The Persistence time is from 10ms to 500ms Set to Normal Acquisition mode Set to Average Acquisition mode Set to Envelope Acquisition mode Only after you set the average acquisition mode this item will be available Select Number of Averages from 2 to 128 with the step of 2 2 35 Key Points Realtime Sampling The sampling rate for Realtime is up to 100MS s At the timebase 200 ns div or faster the oscilloscopes use the sine interpolation to expand the horizontal timebase Equivalent sampling Also be known as Repetitive sampling In this mode you can get up to 100 ps of horizontal resolution This mode is good for observing periodic signal and it will not be available for single shot or pulse Fast Trigger Acquisition In this mode the memory depth is set to 2K so that the waveform refreshes rapidly You could see rapidly changing signals or intermittent signal irregularities Persistence Turn on waveform persistence to slow the decay of waveform points You can set the
58. orm Optional Accessories Communications Extension Module RS 232 The Communications module plugs directly into the rear panel of any 6800 Series Oscilloscope The module provides RS 232 compatible interface Communications Extension Module GPIB amp RS 232 The Communications module plugs directly into the rear panel of any 6800 Series Oscilloscope The module provides full GPIB and RS 232 compatible interface UltraScope for WIN95 98 NT 2000 XP software Accessories case All accessories standard and optional are available by contacting your local Protek office Protek Test amp Measurement 6 6 Appendix C General Care and Cleaning General Care Do not store or leave in the instrument where the LCD display will be exposed to direct sunlight for long periods of time CAUTION To avoid damage to the instrument or probes do not expose them to sprays liquids or solvents Cleaning If this instrument requires cleaning disconnect it from all power sources and clean it with a mild detergent and water Make sure the instrument is completely dry before reconnecting it to a power source To clean the exterior surface perform the following steps 1 Remove loose dust on the outside of the instrument and probes with a lint free cloth Take care to avoid scratching the clear plastic display filter 2 Use a soft cloth dampened with water to clean the instrument Use an aqueous solution of 75 isopropy
59. ory location in which to save the current instrument settings or Storage waveforms and from which to recall the settings No 5 Load Recalls the settings or waveforms stored in the location chosen in the Storage field swe AA Completes the save action Protek Test amp Measurement 2 41 Key Points for Storage System Factory Setup The oscilloscope is set up for normal operation when it is shipped from the factory You can recall the factory default setup any time you want to operate the oscilloscope using or starting from the factory default settings Save You can save five waveforms with two channels or five settings in the nonvolatile memory of the oscilloscope and overwrite setups as needed By default the oscilloscope saves the setup each time it is powered off The oscilloscope automatically recalls this setup the next time it is powered on Load The oscilloscope can recall any of the saved waveforms setups or the factory default setup The recalled waveform can be measured with Cursor or Automatic Measurement NOTE e When you save the waveforms the current settings of the oscilloscope will be saved at the same time e You should wait at least five seconds after your last change to the setup before you turn off the power This ensures that the setup is saved properly e The waveform can be saved in memory except that in the X Y mode Protek Test amp Measurement 2 42 How to Set Up the Utility Figur
60. ou are using This setting remains in effect until changed again Figure 2 7 gives an example for using a 1000 1 probe and it s attenuation factor NEN oF MEM EwW 100M 1 Wi alts Mov Probe attenuation factor s T3 Status changes with the probe attenuation Figure 2 7 Table 2 2 Probe attenuation factors ME settings Protek Test amp Measurement 2 7 5 To invert a waveform Invert turns the displayed waveform 180 degree as respect to the ground level and is available for channels 1 and 2 only When the oscilloscope is triggered on the inverted signal the trigger 1s also inverted Push the Or key and then press the Invert menu box button to invert the signal on this activated channel Figure 2 8 and 2 9 show the changes after inversion Figure 2 8 pilicciifieeien FEL Eg 6 30311 iti PATS Bem v Figure 2 9 plici Protek Test amp Measurement Time 100 0ns The waveform after inversion FF MES LSU Wn lta IL iy Set invert OFF Coupling BY Limit FF BW 100M Vo lta Ii iy Set invert ON Math functions The 6800 series oscilloscopes have the mathematic functions of add subtract multiply and divide for the two channels The oscilloscopes also provide FFT Fast Fourier Transform function without extension module installed Press MATH key to display the MATH menu the settings of this menu are shown in the table below Table2
61. pe to acquire one waveform each time you press the RUN STOP key and the trigger condition is detected 3 Coupling Trigger coupling determines what part of the signal passes on to the trigger circuit Coupling types include AC DC LF Reject and HF Reject AC AC coupling blocks DC components DC DC coupling passes both AC and DC components LF Reject LF Reject coupling does the opposite of high frequency rejection HF Reject HF Reject coupling blocks the high frequency portion and passes on only the low frequency components 4 Pretrigger All events displayed left of the trigger point happened before the trigger occurred and these events are called pretrigger information The trigger position is typically set at the horizontal center of the screen Adjusting the horizontal POSITION of the waveform allows you to see more or less pretrigger information You will find this feature very useful because you can now see the events that led up to the trigger point Everything to the right of the trigger point is called posttrigger information The amount of delay range pretrigger and posttrigger information available 1s dependent on the sweep speed selected Protek Test amp Measurement 2 34 How to Set Up the Sampling System As Figure 2 22 displays the ACQUIRE button at the MENU control area is the function key for sampling system Acquire Menu Key Figure 2 22 STORAGE UTILITY Using ACQUIRE key to p
62. plitude To quickly display a signal do these steps as follows 1 Set the probe and the channel attenuations to 10X 2 Connect signal to CH1 with the probe 3 Press the AUTO key The oscilloscope sets the vertical horizontal and trigger controls automatically If you need to optimize the display of the waveform you could adjust these controls manually Selecting Automatic Measurements The oscilloscope could take automatic measurements of most displayed signals To measure the frequency and peak to peak amplitude do these steps as follows 1 Measure peak to peak amplitude Pressing gt Source gt CH1 to set measurement source Pressing Type gt Voltage 1 3 to select measurement page Pressing Vpp to select peak to peak measurements and the result will be displayed on the screen 2 Measure frequency Pressing Type gt Time 1 3 to select measurement page Pressing Freq to select frequency measurements NOTE The frequency period and peak to peak measurements are shown on the screen and are updated periodically Protek Test amp Measurement 3 Example 2 Viewing a signal delay through a circuit You need to test the input and the output signals of a circuit with the oscilloscope Before the test you should set the probe and the channel attenuation to 10X and connect the CHI to the input CH2 to the output of circuit with the probes Do these steps as follows 1 Display the signals CH1 and CH2 1
63. r level range from 8 V to 8 V This allows the oscilloscope to trigger on a larger signal AC Line You can use this trigger source when you want to look at signals related to the power line frequency such as lighting equipment and power supply devices The oscilloscope generates the trigger so you do not have to input a trigger signal 2 Mode The trigger mode determines how the oscilloscope behaves in the absence of a trigger event The oscilloscope provides three trigger modes Auto Normal and Single Auto This trigger mode allows the oscilloscope to acquire a waveform even when it does not detect a trigger condition If no trigger condition occurs while the oscilloscope waits for a specific period as determined by the time base setting it will force itself to trigger When forcing invalid triggers the oscilloscope cannot synchronize the waveform and the waveform seems to roll across the display If valid triggers occur the display becomes stable on the screen You can use Auto mode to monitor an amplitude level such as a power supply output which may cause the waveform to roll across the display Protek Test amp Measurement 2 33 Normal The Normal mode allows the oscilloscope to acquire a waveform only when it is triggered If no trigger occurs the oscilloscope will not acquire a new waveform and the previous waveform if any will remain on the display Single The Single mode allows the oscillosco
64. re associated with analog oscilloscopes A Color LCD or a Mono LCD is used for bright and clear display Storage is as simple as pressing a button Negative time allows the viewing of events that occur before the trigger event Cursors and automatic measurements greatly simplify the analysis of these events You can upgrade this oscilloscope for communication with PC or remote control with the addition of an interface module The FFT math function is built in the 6810 oscilloscopes Bring your scope and PC together with Ultrascope software Ultrascope which runs under Windows allows easy transfer of scope traces and waveform data to your PC for incorporation into documents or storage enables remote control with PC through RS 232 or GPIB IEEE 488 port Protek Test amp Measurement II Accessories already included in the package e Two 1 5 meter 10 1 probes e Power cable for country of destination e This User Manual e Warranty and Registration Form Options available e UltraScope Software for Win95 98 NT 2000 XP e Communications Extension Module RS 232 e Communications Extension Module GPIB amp RS 232 e Accessories Case already included in 6810 Protek Test amp Measurement IH Contents This manual is the user guide for the 6810 series Digital Storage Oscilloscopes and contains six chapters Chapter 1 The Oscilloscope at a glance This chapter is a quick start guide that gives you a brief overview of the osci
65. re testing the video circuit and need to display the video output signal Use the video trigger to obtain a stable display Triggering on Video Fields To trigger on the video fields do these steps Ky pn Press the key in the Trigger control area to see the Trigger menu Press softkey to select Video Press softkey to select Source as CH1 Press softkey to select Polarity as u Press softkey to select Sync as Field 1 or Field 2 Turn the horizontal SCALE knob to see a complete field on the screen Jede Polanty LI LI LI ee gia Priprtiidid i uu INED M ec n ie ance DEBES 200m Figure 3 7 Protek Test amp Measurement 3 10 Triggering on Video Lines To Triggering on Video Lines do these steps 2 3 4 Press the key 1n the Trigger control area to see the Trigger menu Press softkey to select Video Press softkey to select Source as CH1 Press softkey to select Polarity as u Press softkey to select Sync as Line Turn the horizontal SCALE knob to see a complete field on the screen widen TRIGGER Edge Figure 3 8 Protek Test amp Measurement 3 11 Chapter 4 Prompting messages and Troubleshooting Prompting messages Dot display only Prompting that you could only use Dots type for display under this setting Function not used Prompting that this function 1s not available under current setting Measurement already selected Prompting that the parameter
66. st window Table2 5 Characteristics Best for measuring Rectangle Hanning Hamming Blackman Best frequency worst Magnitude resolution This 1s essentially the same as no window Better frequency poorer magnitude accuracy than Rectangular Hamming has slightly better frequency resolution than Hanning Best magnitude worst at resolving frequencies Protek Test amp Measurement Transients or bursts where the signal levels before and after the event are nearly equal Equal amplitude sine waves with frequencies that are very close Broad band random noise with a relatively slow varying spectrum Sine periodic and narrow band random noise Transients or bursts where the signal levels before and after the events are significantly different Predominantly single frequency waveforms to look for higher order harmonics 2 14 Measuring FFT Waveforms Using Cursors You can take two measurements on FFT waveforms magnitude in dB or Vrms and frequency in Hz Press CURSOR Mode gt Manual and select Source as FFT Then choose measurement Type to Time or Voltage Use the vertical IPOSITION knob to move cursors A and use horizontal POSITION knob to move cursor B The menu boxes display the delta between the two cursors the value at cursor A position and the value at cursor B position Delta is the absolute value of cursor 1 minus cursor 2 TENUES USO Iviode 4 BB CURSOR lode
67. sted in Accessories available in the front of this manual e If the contents are incomplete or damaged notify your Protek sales office 3 Inspect the instrument e If there is mechanical damage or defect or if the instrument does not operate properly or pass performance tests notify your Protek sales office e If the shipping container is damaged or the cushioning materials show signs of stress notify the carrier as well as your Protek sales office Keep the shipping materials for the carrier s inspection The Protek office will arrange for repair or replacement at Protek s option without waiting for claim settlement Protek Test amp Measurement 1 5 To take a functional check Perform this quick functional check to verify that your instrument is operating correctly 1 Turn on the instrument Wait until the display shows that all self tests passed Push the STORAGE button select Setups in the top menu box and push the Factory menu box STORAGE EN o f z e m z f T m Ra 7 A if s A N i po ON OFF JM Figure 1 4 2 Input a signal to a channel of the oscilloscope 1 Set the switch to 10X on the probe and connect the probe to channel 1 on the oscilloscope To do this align the slot in the probe connector with the key on the CH
68. t amp Measurement V CHAPTER 4 PROMPTING MESSAGES AND TROUBLESHOOTING 4 Prompts NICSSOge S ataca iita eed ea otn tea ee ise a Lies ea heen eee ane 4 Troupes HOON acer isdem atest eis ae seed ates ace ses piace Ente tus nat omui sten pu E Eee omes vto ta Rea umeS ctetu d 4 3 CHAPTER 5 SUPPORT amp SERVICE ideiceiodedi beige ind Das iude bas diues 5 CHAPTER 6 Addon qii PP 6 1 Appendix A Specifications ceo e eec eor E o oie e bera n Sau Do oe DU tu GU Do oe DU DN Gua ONU 6 1 Appendix B 6800 Series Accessories sss eene eene eene eene enne enne 6 6 Appendix C General Care and C leantife soos oot obo Perche a Sono epa fos besa tono rato EEvsale 6 7 lu qd Index 1 Protek Test amp Measurement VI Chapter 1 The Oscilloscope at a glance This chapter covers the following topics The front panel and user interface To inspect the instrument To take a functional check To compensate probes To display a signal automatically To set up the vertical window To set up the horizontal system To trigger the oscilloscope Protek Test amp Measurement l 1 The front panel and the user interface One of the first things you will want to do with your new oscilloscope is to become acquainted with its front panel Therefore we have written the exercises in this chapter to familiarize you with some of its controls The front panel has knobs and keys Th
69. t sure that there s No Signal connected to the input terminals Calibration Progress Fress RUN to Abort Figure 2 35 Interface while vertical calibrating Protek Test amp Measurement 2 45 Horizontal Calibration Before the horizontal calibration begins you must confirm that you have finished the vertical calibration first Press the softkey to select Horizontal System Calibration and start the calibration procedure The operation and the prompting message are similar with the vertical system calibration Please make it sure that there s No Signal connected to the input terminals Run Vertical Calibration First Calibration Progress RUH key to Start AUTO key to Exit Figure 2 36 Interface before the start of horizontal calibration it sure that there s gnal connected to the input terminals Run Vertical Calibration First Calibration Progress Fress RUN to Abort Figure 2 37 Interface while horizontal calibrating Protek Test amp Measurement 2 46 The I O setup Press UTILITY I O Setup to enter the following menu Figure 2 38 Table 2 20 LO SETUP T Settings Baud The oscilloscope doesn t link RS 232 rene to a extension module that has Baud the RS 232 communication function Cr IB GPIB The oscilloscope doesn t link Address Addes SOROR to a extend module that has the E GPIB communication function Figure 2 39 Table2 21 vs Settings hs 23z Baud Set the baud rate of RS 23
70. teps to set up the YT waveform 1 Press to display a YT waveform 2 Position the YT waveform horizontally so that the waveform area of interest 1s contained in the display The 6800 series use 1024 points of the time domain waveform to transform into an FFT waveform 4 Use the vertical key to set the YT waveform Volts Div so that the signal does not go off screen Off screen waveform peaks can result in FFT waveform errors 5 Use the horizontal to set the resolution you want in the FFT waveform It is important to show a number of signal cycles 1f possible Setting the time division to a faster setting means the FFT waveform shows a larger frequency range has less frequency resolution and reduces aliasing In many cases you can produce a useful FFT waveform even if the YT waveform is not triggered This is especially true if your signal is periodic or random noisy However transient or burst waveforms should be triggered and positioned as close as possible to center screen Protek Test amp Measurement 2 10 Displaying the FFT Waveform You can get the FFT menu below by pressing MATH gt Operation gt FFT FFT Operator SuurceFF Figure 2 11 SCALE Table2 4 CHI Source FFT CH2 Define CH1 or CH2 as FFT source Rectangle Hanning Hamming Blackman Vrms Set Vrms as vertical unit diui Set dBVrms as vertical unit Select window for FFT Protek Test amp Measurement 2 11 TINTE FFT Opera
71. tion 3 1 SourceFF i Rectangle i i zj k P ESSA ta bel tid CHi w 4 00 Time 250 Qus Figure 2 12 The Figure 2 12 shows the FFT operation interface The speciation of the numbered area are listed below 1 This block with transparent blue color displays the 1024 points for FFT and it s position in the whole memory The symbol represents the current YT window displayed Operation menu for FFT The vertical scale for FFT The horizontal scale for FFT The channels mark for YT display 2 3 4 5 6 Current sampling rate 7 8 The MATH channel s mark for FFT 9 The vertical scale for YT display 10 The horizontal scale for YT display Protek Test amp Measurement 2 12 Key points for FFT e Using FFT slows down the oscilloscope s response time in Normal acquisition mode 16k record length e A waveform acquired in Normal acquisition mode has a lower noise floor and better frequency resolution than a waveform acquired in Fast Trigger mode e Signals that have a DC component or offset can cause incorrect FFT waveform component magnitude values To minimize the DC component choose AC Coupling on the source signal e To reduce random noise and aliased components in repetitive or single shot events set the oscilloscope acquisition mode to average over 16 or more samples Average mode attenuates signals not synchronized with the trigger e Do not use the Average acquisition mo
72. ween the two channels at the falling edge Protek Test amp Measurement 2 56 How to measure with cursors The oscilloscopes provide cursors to measure the signals on the screen Figure 2 51 displays the CURSOR key on the front panel for this menu MENU MEASURE C IRE STORAGE Am Figure 2 51 DISPLAY Cursor Measurement The cursor measurements are divided into three modes Manual Track and Auto Measure l Manual In this mode the screen displays two parallel cursors You can move the cursors to make custom voltage or time measurements on the signal The values are displayed on the black boxes below the menu Before using cursors you should make sure that you have set the Signal Source as the channel for measuring 2 Track In this mode the screen displays two cross cursors The cross cursor sets the position on the waveform automatically You could adjust cursor s horizontal position on the waveform by turning the POSITION knob in conjunction with the cursor The oscilloscope displays the values of the coordinates on the black boxes below the menu 3 AutoMeasure This mode will take effect with Automatic Measurements The instruments will display cursors while measuring parameters automatically These cursors demonstrate the physical meanings of these measurements NOTE The AutoMeasure mode for Cursor measuring will be invalid without automatic measurements Protek Test amp Measurement 2 57 Menus and oper
73. ystem Calibration calibration procedure Systeri Calibration Horizontal System Select to run the horizontal system Calibration calibration procedure Horizontal Syste rr Cahbraton NOTE e The instrument is self calibrated at the factory However it should be self calibrated again in its working environment after a 30 minute warm up to obtain the best accuracy e When you calibrate the instrument you must follow the steps below Step 1 Vertical System Calibration Step 2 Horizontal System Calibration e The routine takes several minutes to complete Protek Test amp Measurement 2 44 Vertical Calibration Press the softkey to select Vertical System Calibration and start the calibration procedure Please pay attention to unplug the cables or probes connected with the channels and make sure that there is no signal input to the oscilloscope before calibration Press RUN STOP key to begin the routine The white blocks in the progress bar will be going while calibrating You can cancel the progress by pressing the key After the progress bar is full the system will pop up a message Mission Accomplished and then press the RUN STOP key to finish the calibration routine CAUTION Please make it sure that there s No Signal connected to the input terminals Calibration Progress Fress RUN to Start Fress AUTO to Exit Figure 2 34 Interface before the start of vertical calibration Please make i

Download Pdf Manuals

Related Search

Related Contents

aw_1500_1995_english 885KB May 04 2006 11:24:57 AM    RCA RP3536 User's Manual    SCENA 1000 S User manual rel 1.0  PRoFI aMX IT  Edimax WK-1068 Wi-Fi Black, White router  Compréhension de textes et documents autres que narratifs  LEG12010  Edimax EW-7612PIN V2  

Copyright © All rights reserved. Failed to retrieve file