Home

HP 54610 Oscilloscope - Agilent Technologies

Contents

1. 1 7 The Oscilloscope at a Glance To setup the time base To set up the time base The following exercise guides you through the time base keys knobs and status line Turn the Time Div knob and notice the change it makes to the status line The Time Div knob changes the sweep speed from 1 ns to 5s ina 1 2 5 step sequence and the value is displayed in the status line Change the horizontal setup and notice that each change affects the status line differently e Press Main Delayed A softkey menu appears on the display with six softkey choices e Toggle each of the softkeys and notice which keys cause the status line to change 1 8 The Oscilloscope at a Glance To setup the time base There is also a horizontal vernier softkey that allows the Time Div knob to change the sweep speed in smaller increments These smaller increments are calibrated which results in accurate measurements even with the vernier turned on Turn the Delay knob and notice that its value is displayed in the status line The Delay knob moves the main sweep horizontally and it pauses at 0 00 s mimicking a mechanical detent At the top of the graticule is a solid triangle symbol and an open triangle V symbol The v symbol indicates the trigger point and it moves in conjunction with the Delay knob The V symbol indicates the time reference point If the time reference softkey is set to left the V is located o
2. Equipment Required Equipment Critical specifications Recommended Model Part Pulse generator Rise time lt 175 ps PSPL1107B TD and PSPL 1110B Driver Adapter SMA f to BNC m HP 1250 1787 Connect the pulse generator to channel 1 Press Autoscale Change the time base to 10 ns div Press 1 then toggle the vernier softkey to On Adjust the Volt Div until there are about 6 divisions of vertical deflection 3 26 Service Adjusting the Oscilloscope 6 Adjust the channel 1 high frequency response for 1 5 minor division of overshoot 6 7 Repeat steps 1 through 6 for channel 2 Figure 3 2 High frequency pulse response adjustments 54600E 80 Table 3 11 Service Adjusting the Oscilloscope To adjust the display The display adjustments are optional and normally do not require adjustment You should use this procedure only for the few cases when the display is obviously out of adjustment Equipment Required Equipment Critical specifications Recommended Model Part Digital multimeter Accuracy 0 05 1 mV resolution HP 34401A Connect the digital multimeter to the end of R901 closest to the fuse See figure 3 3 Adjust B for 14 00 V Press Print Utility Press the Self Test softkey then press the Display softkey Adjust V HO vertical hold for vertical synchronization Set the in
3. eae a a a R A ce a es ee E DE of Go ea Ree a el a ae ae Be at Ae a ae ca Pou i 22 00ns te 59 60ns amp t 37 60ns 1 At 26 60MHe ti Cursors used to make channel to channel delay measurements E5009 10 057 4 STOP HoE TA E E A a eae ee rro 1 At 6 250MHz ti 16 05us t2 16 2ius t 160 0ns The cursors track delayed sweep Expand the display with delayed sweep then characterize the event of interest with the cursors 2 25 Figure 2 15 Figure 2 16 Operating Your Oscilloscope To make cursor measurements 5008 7 408 10 087 1 At 178 6kHz ti 200 0ns t2 5 800us t amp 600us Pressing t1 and t2 softkeys simultaneously causes the cursors to move together when the cursor knob is adjusted 1 At 176 6KHe ti 20 60us t2 26 20us t 5 600us By moving the cursors together you can check for pulse width variations in a pulse train as figures 2 15 and 2 16 show 2 26 Operating Your Oscilloscope To remove cabling errors from time interval measurements To remove cabling errors from time interval measurements When measuring time intervals in the nanosecond range small differences in cable length can totally obscure the measurement The following exercise shows how to remove errors that different cable lengths or characteristics introduce to your measurement The Skew control makes it possible
4. source is the grey front panel key labeled Source under the trigger portion of the front panel and Line isa softkey The word Line appears at the bottom of the display directly above its corresponding softkey The rear cover of this book is a fold out reference guide On this cover you will find a diagram of the front panel Inside the cover is another diagram showing which grey keys to press to bring up the various softkey menus Also included inside the rear cover of this book is a status line example The status line located at the top of of the display lets you quickly determine the setup of the oscilloscope In this chapter you will learn to read at a glance the setup of the oscilloscope from the status line 1 2 CAUTION A CAUTION The Oscilloscope at a Glance To connecta signal to the oscilloscope To connect a signal to the oscilloscope The HP 54610 is a two channel 500 MHz bandwidth oscilloscope with an external trigger input The input impedance of this oscilloscope is selectable either 50Q or 1 MQ The 50Q mode matches 50Q cables commonly used in making high frequency measurements This impedance matching gives you the most accurate measurements since reflections are minimized along the signal path The 1 MQ mode is for use with probes and for general purpose measurements The higher impedance minimizes the loading effect of the oscilloscope on the circuit under test In this exercise you
5. To seta long holdoff time go to a slower sweep speed The value used to increment the holdoff depends upon the sweep speed or time div selection However the actual holdoff value is a fixed number it is not a percentage of sweep speed For a time div setting of 5 ns div the holdoff increment is about 50 ns For a time div setting of 5 s div the holdoff increment is about 100 ms The Oscilloscope at a Glance To use roll mode To use roll mode Roll mode continuously moves data across the display from right to left Roll mode allows you to see dynamic changes on low frequency signals such as when you adjust a potentiometer Two frequently used applications of roll mode are transducer monitoring and power supply testing Press Mode Then press the Auto Lv1 or Auto softkey Press Main Delayed g Press the Ro11 softkey The oscilloscope is now untriggered and runs continuously Also notice that the time reference softkey selection changes to center and right Press mode Then press the Single softkey The oscilloscope fills either 1 2 of the display if Center is selected for the time reference or 9 10 of the display if Right is selected for the time reference then it searches for a trigger After a trigger is found the remainder of the display is filled Then the oscilloscope stops acquiring data You can also make automatic measurements in the roll mode Notice that the oscilloscope brie
6. User and ee Agilent Technologies Service Guide Publication number 54610 97009 March 1994 pdf version Dec 1998 This manual may contain references to HP or Hewlett Packard Please note that Hewlett Packard s former test and measurement semiconductor products and chemical analysis businesses are now part of Agilent Technologies To reduce potential confusion the only change to product numbers and names has been in the company name prefix where a product number name was HP XXXX the current name number is now Agilent XXXX For example model number HP 8648 is now model number Agilent 8648 For Safety Information Warranties and Regulatory information see the pages behind the index Copyright Hewlettt Packard Company 19938 1994 All Rights Reserved HP 54610 Oscilloscope A General Purpose Oscilloscope The HP 54610 oscilloscope offers exceptional waveform viewing and measurements in a small lightweight package This dual channel 500 MHz bandwidth oscilloscope is designed for use in labs where high speed analog and digital circuits are being tested This oscilloscope gives you e 500 MHz bandwidth and 1 ns div Main and Delayed time bases e Selectable input impedance e Protection of the internal 50 ohm load e Adjustable time nulling to remove the effects of cabling e Repetitive waveform sampling at up to 10 GSa sec 20 MSa sec single shot e Viewable external trigger input This oscilloscope is very easy to u
7. System board Service Replacing Parts in the Oscilloscope a Remove the front panel b Disconnect the ribbon cable and the calibration cable from the display c Using the T10 TORX driver remove the two screws that hold the display to the deck Make sure that when you reinstall these screws that you use the correct parts If longer screws are used they can short the system board to ground d As you lift the display rotate it off the two tabs on the side of the deck a Using the T10 TORX driver remove the eight screws that hold the system board to the deck two of the screws are in the attenuator covers b Remove the two screws from the rear panel interface connector and the nut from the rear panel BNC c Disconnect the three ribbon cables and the calibration cable d As you remove the system board rotate the system board so that the BNCs clear the front panel 3 42 Power supply Figure 3 6 Service Replacing Parts in the Oscilloscope a Remove the fan b Disconnect the ground wire green wire with the yellow stripe from the deck Disconnect the ribbon cable from the power supply board d Use a screw driver to gently unhook the latch that holds the white shaft to the power switch then disconnect the shaft from the power switch After you disconnect the shaft make sure you position it in the recess along the side of the display bracket A 54600E29 e Using the T10 TORX driver remove the screw h
8. the oscilloscope will recover the event and restore the oscilloscope settings e To clear the display press Erase e To exit the Autostore mode press either Run or Autostore Notice that RUN replaces STORE in the status line indicating that the oscilloscope has exited the Autostore mode Operating hint The single shot bandwidth is 2 MHz for single channel operation and 1 MHz for two channel operation There are twice as many sample points per waveform on the one channel acquisition than on the two channel acquisition Operating Your Oscilloscope To capture glitches or narrow pulses To capture glitches or narrow pulses A glitch is a rapid change in the waveform that is usually narrow as compared to the waveform This oscilloscope has two modes of operation that you can use for glitch capture peak detect and Autostore Connect a signal to the oscilloscope and obtain a stable display 2 Find the glitch Use peak detect for narrow pulses or glitches that require sweep speeds slower than 50 ps div e To select peak detect press Display Next press the Peak Det softkey Peak detect operates at sweep speeds from 5 s div to 50 us div When operating the initials Pk are displayed in the status line in inverse video At sweep speeds faster than 50 us div the Pk initials are displayed in normal video which indicates that peak detect is not operating 2 10 Operating Your Osci
9. vertical 3 25 channel signal connection 1 3 characteristics 4 2 to 4 9 Clear Cursors softkey 2 23 Clear Meas softkey 2 17 clear measurement 2 17 Clear softkey 2 38 color burst 2 37 compensation probe 1 4 complex waveforms 2 12 coupling ac 1 6 1 10 4 3 4 5 dc 1 6 1 10 4 3 4 5 cursor measurements 2 23 to 2 26 Cursors active 2 23 clear 2 23 Cursors key 2 23 custom measurements 2 23 D DAC softkey 3 6 DC Calibrator 3 6 3 24 dc coupling 1 6 1 10 4 5 delay 1 9 delay calibration 3 25 Delay knobs 2 3 Delayed softkey 2 3 delayed sweep characteristics 2 3 to 2 5 4 4 operation 2 3 to 2 5 2 11 delta t delta V See cursor measurements disassembly 3 40 display characteristics 4 6 to adjust 3 28 to 3 29 to erase 2 8 Display softkey 3 28 Duty Cy softkey 2 17 duty cycle 2 16 to 2 17 E EMI 4 9 environmental characteristics 4 8 Erase softkey 2 7 to 2 8 erasing the display 2 8 exploded view 3 47 external trigger 1 3 1 12 4 5 F fall time 2 16 2 18 Field 1 softkey 2 35 Field 2 softkey 2 35 firmware calibration 3 24 Freq softkey 2 14 frequency measurements 2 14 to 2 15 2 17 reject 2 31 to 2 32 2 35 4 5 front panel keys See keys listed by name G general characteristics 4 8 to 4 10 glitch capture 2 10 to 2 11 H half bright contrast 3 29 HF Rej softkey 2 35 high frequency pulse response 3 26 high frequency reject 2 31 2 35 4 5 holdoff 1 12 2 12
10. 500 MHz 100 mV Trigger View External trigger input is displayed along with channel 1 and channel 2 Trigger View Bandwidth gt 350 MHz Coupling ac dc LF reject HF reject and noise reject Input resistance 1 MQ or 50Q Input capacitance 12 pf Maximum input voltage 250 V dc peak ac 5 Tested see To verify trigger sensitivity on page 3 17 4 5 Performance Characteristics XY Operation XY Operation Operating mode X Ch 1 Y Ch 2 Z Ext Trigger Z Blanking TTL high blanks trace Bandwidths X axis and Y axis same as vertical system Z axis is dc to 100 MHz Phase difference 3 degrees at 100 kHz Display System Display 7 inch raster CRT Resolution 256 vertical by 500 horizontal points Controls Front panel intensity control Graticule 8 x 10 grid or frame Storage Scope Autostore saves previous sweeps in half bright display and the most recent sweep in full bright display This allows easy differentiation of current and historic information 4 6 Performance Characteristics Acquisition System Acquisition System Maximum sample rate 10 GSa s for repetitive signals 20 MSa s for single shot signals on a single channel and 10 MSa s for single shot signals on dual channels Resolution 8 bits Simultaneous channels Channels 1 and 2 Record length Vectors off 4 000 points Vectors on and or single shot 2 000 points Maximum update rate Vectors off 1 500 000 points sec Vectors
11. CALIBRATOR connector Press Print Utility Press the Self Test softkey then press the Dac softkey The multimeter should measure 0 00 V dc 500 uV If the result is not within the test limits see Troubleshooting the oscilloscope on page 3 30 Press any key to continue the test The multimeter should read 5 000 V 10 mV If the result is not within the test limits see Troubleshooting the oscilloscope on page 3 30 3 6 Table 3 3 Service Verifying Oscilloscope Performance To verify voltage measurement accuracy In this test you verify the voltage measurement accuracy by measuring the output of a power supply using dual cursors on the oscilloscope and comparing the results with a multimeter Test limits 2 of reading 0 4 of full scale Equipment Required Equipment Critical specifications Power supply 14 mV to 35 Vdc 0 1 mV resolution Digital multimeter Better than 0 1 accuracy Cable BNC Qty 2 Shorting cap BNC Adapter BNC f to banana m Adapter BNC tee m f f Recommended Model Part HP 6114A HP 34401A HP 10503A HP 1250 0774 HP 1251 2277 HP 1250 0781 3 7 Service Verifying Oscilloscope Performance Set up the oscilloscope a Press Setup then press the Default Setup softkey b Press Voltage then press the Vavg softkey c Set the Volts Div to the first line of table 3 4 d Adjust the channel 1 Position knob to place the baseline near but no
12. Hz 253 5 Us 5 2 Vp p If the signals are good replace the display assembly If not replace the system board 6 Disconnect the LVPS ribbon cable from the display board Service Troubleshooting the Oscilloscope Measure the power supply voltages again steps 1 3 If the voltages are within the test limits replace the display assembly If not do the steps below a Disconnect the power cord b Disconnect the ribbon cable from the power supply c Connect the dummy load to the power supply connector d Connect the power cord then measure the power supply voltages again see new tolerances below 5 1 V 4 95 V to 5 25 V 15 75 V 15 V to 16 5 V 15 75 V 15 V to 16 5 V If the voltages are now within the test limits replace the system board If not replace the power supply Is the fan running If yes go to To run the internal self tests on page 3 36 If not do the steps below The LVPS has a thermal cut out circuit If the fan is defective the LVPS shuts down when it gets too hot for safe operation a Disconnect the fan cable from the power supply b Measure the fan voltage at the connector on the power supply If the fan voltage is 8 3 Vdc replace the fan If not replace the power supply 3 34 1 2 3 Service Troubleshooting the Oscilloscope To check the LVPS Low Voltage Power Supply Disconnect the power cord then set the oscilloscope on its side Connect the negative
13. Press Time A softkey menu appears with six softkey choices Three of the softkeys are time measurement functions Source Selects a channel for the time measurement Time Measurements Three time measurement choices are available Freq frequency Period and Duty Cy duty cycle These measurements are made at the 50 levels Refer to figure 2 6 Clear Meas clear measurement Erases the measurement results and removes the cursors from the display Next Menu Replaces the softkey menu with six additional softkey choices 3 Press the Next Menu softkey Another time measurement softkey menu appears with six additional choices Four of the softkeys are time measurement functions Show Meas show measurement Displays the horizontal and vertical cursors where the measurement was taken 2 17 Operating Your Oscilloscope To make time measurements automatically Time Measurements Four additional time measurement choices are available Width Pulse Width Width Rise Time and Fall Time Width measurements are made at the 50 levels whereas rise time and fall time measurements are made at the 10 to 90 levels Previous Menu Returns to the previous softkey menu 4 Press the Rise Time softkey The oscilloscope automatically measures the rise time of the signal and displays the result on the display The oscilloscope makes automatic measurements on the first displayed event Figure 2 7 shows how to use delayed sweep to i
14. RSO2 Part 2 Part I RS02 Part 2 Part II exceptioned RSO3 Part 2 limited to 1 V meter from 14 kHz to 1 GHz with option 001 installed Slight trace shift from 80 MHz to 200 MHz 4 9 Performance Characteristics General Vibration Operating 15 minutes along each of the 3 major axes 0 025 inch p p displacement 10 Hz to 55 Hz in one minute cycles Held for 10 minutes at 55 Hz 4 g at 55 Hz Shock Operating 30 g 1 2 sine 11 ms duration 3 shocks per axis along major axis Total of 18 shocks Physical characteristics Size excluding handle Height 172 mm 6 8 in Width 322 mm 12 7 in Depth 317 mm 12 5 in Weight 6 8 kg 15 lbs Product Regulations Safety IEC 348 CSA C22 2 N 0 231 Series M 89 EMC This Product meets the requirement of the European Communities EC EMC Directive 89 336 EEC Emissions EN55011 CISPR 11 ISM Group 1 Class A equipment SABS RAA Act No 24 1990 Immunity EN 50082 1 Code Notes IEC 801 2 ESD 8kV AD 2 IEC 801 3 Rad 3 V m 2 IEC 801 4 EFT 1kV 2 1P erformance Codes 1 PASS Normal operation no effect 2 PASS Temporary degradation self recoverable 3 PASS Temporary degradation operator intervention required 4 FAIL Notrecoverable component damage 2 Notes None Sound Less than 60 dBA Pressure Level 4 10 Glossary 50Q Input Protection This only functions when the scope is powered on The 50 load will typically dis connect if g
15. Troubleshooting the Oscilloscope To check out the oscilloscope Is there an interface module connected to the oscilloscope If yes do the following steps If not go to step 2 a Turn off the oscilloscope b Remove the module c Turn on the oscilloscope then check for the failing symptom If the failing symptom disappears replace the module If not go to step 2 Disconnect any external cables from the front panel Disconnect the power cord then remove the cover Connect the power cord then turn on the oscilloscope If the display comes on after a few seconds HP logo and copyright text followed by a graticule with text at top of the display go to To check the LVPS on page 3 35 If after checking the LVPS the voltages are within the test limits go to step 8 If not go to step 6 If the display did not come on do the steps below a Check the intensity knob to see setting to see if its set too low b Ifthere is still no display disconnect the power cord ce Check all cable connections d Goto To check the LVPS on page 3 35 If the voltages are within the limits go to step 5 If not go to step 6 3 32 Table 3 13 Service Troubleshooting the Oscilloscope 5 Disconnect the display cable then check the following signals on the system board Signals at U56 Signal Frequency Pulse width Voltage U16 Pin 7 DE 19 72 kHz 38 0 us 2 6 Vp p U16Pin 24 Hsync 19 72 kHz 3 0 us 5 0 Vp p U9 Pin 2 Vsync 60 00
16. 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 is less than or equal to 250 V dc plus the peak ac For a complete list of the characteristics see chapter 4 Performance Characteristics Do not exceed 5Vrms in 50Q mode When input protection is enabled in 50Q mode the 50Q load will disconnect if greater than 5 Vrms is detected However the inputs could still be damaged depending on the time constant of the signal The 50Q input protection mode only functions when the oscilloscope is powered on Use a cable or a probe to connect a signal to channel 1 The oscilloscope has automatic probe sensing If you are using the probes supplied with the oscilloscope or other probes with probe sensing then the input impedance and probe attenuation factors will be automatically set up by the oscilloscope when automatic probe sensing is turned on The default setting is to have automatic probe sensing on This is indicated by the selection of Auto n under the Probe softkey where n is 1 10 or 100 If you are not using automatic probe sensing then follow these next two steps To set the input impedance press 2 Select the desired Input impedance of 50Q or 1MQ To set the probe attenuation factor press 2 Select the Next Menu softkey Next toggle the Probe softkey to change the attenuation factor to match the probe you are using
17. level to the center of the signal If ac coupled the oscilloscope resets the trigger level to halfway between the minimum and maximum amplitudes as displayed on the screen In addition every time you press the Auto Level softkey the oscilloscope resets the trigger level If Auto is the trigger mode Auto flashes in the status line and the oscilloscope free runs If either Normal or TV is the trigger mode the trigger setup flashes in the status line The Oscilloscope at a Glance To trigger the oscilloscope e Press Slope Coupling A softkey menu appears on the display If you selected Auto level Auto Normal or Single as a trigger mode six softkey choices are displayed If you selected TV as a trigger source five other softkey choices are available e Toggle each of the softkeys and notice which keys affect the status line e On the HP 54610 the external trigger input is selectable as ac or dc coupled or ground 3 Adjust the Holdoff knob and observe how it changes the display Holdoff keeps the trigger from rearming for an amount of time that you set Holdoff is often used to stabilize the display of complex waveforms The Holdoff range is from 200 0 ns to about 13 5 s When you adjust the Holdoff knob the current holdoff time is briefly displayed in inverse video near the bottom of the display For an example of using Holdoff refer to the section To trigger on a complex waveform on page 2 12
18. to slide the oscilloscope out of the cabinet Remove the faulty assembly You can remove any of the following six assemblies fan front panel display system board power supply and keyboard a b Disconnect the fan cable from the power supply board Using the T15 TORX driver remove the three screws that hold the fan to the deck Remove the intensity knob by pulling straight out Disconnect the keyboard ribbon cable from the system board Remove the probe sense nuts 3 40 Service Replacing Parts in the Oscilloscope d Use a screwdriver to release retainer tab A and your finger to release retainer tab B See figure 3 5 Releasing front panel from deck of intrument When tab B is released be careful that the sheet metal tab of front panel ground input clears the softkey circuit board The circuit board may be depressed slightly with a screwdriver to avoid damage to the circuit board e Rotate the front panel out until the bottom clears the rear of the assembly then lift the front panel to free the hooks on top Hint When installing the front panel make sure that the power switch shaft is aligned with its mating hole in the front panel Hint The front panel swings in to engage the two retainer tabs Before attempting to engage the retainer tabs make sure that the six hooks on top of the front panel are fully engaged with their mating holes in the sheet metal Figure 3 5 54600E 31 Display
19. waveform Run The oscilloscope acquires data and displays the most recent trace Save Saves the current front panel setup to one of the possible 16 memory locations Memory selec tion is with either a softkey or the knob closest to the Cursors front panel key Setup Allows access to front panel setup keys Glossary Single single shot The oscillo scope triggers once when the trigger conditions are met The oscilloscope must be rearmed before the oscillo scope retriggers by pressing either the Run or Autostore front panel keys Skew Time offset between two sig nals typically due to differences in either cable lengths or characteristics Slope Coupling Allows access to the trigger slope and input coupling menus Slope Selects either the rising or falling edge of the signal to trigger the oscilloscope Source Allows you to select a trig ger source Stop Freezes the display Time Allows access to the automat ic time measurement keys Time Div Changes the time base in a 1 2 5 step sequence from 1 ns to 5S Time Null The removal of time of fset errors between two signals The error is typically due to differences in either cable lengths or charac Glossary 3 Glossary teristics Also called deskewing Time Ref Lft Cntr time refer ence left or center Sets the time reference to either one graticule in from the left edge of the display or to center of the display Trace Allows acc
20. 1 3 Figure 1 1 The Oscilloscope at a Glance To connecta signal to the oscilloscope You should compensate 10 1 probes to match their characteristics to the oscilloscope A poorly compensated probe can introduce measurement errors To compensate a probe follow these steps 1 Connect the 10 1 probe from channel 1 to the front panel probe adjust signal on the oscilloscope 2 Press Autoscale 3 Use a nonmetallic tool to adjust the trimmer capacitor on the probe for the flattest pulse possible as displayed on the oscilloscope Overcompensation causes pulse peaking Figure 1 2 Correct compensation with a flat pulse top Figure 1 3 Undercompensation causes pulse rolloff The Oscilloscope at a Glance To display a signal automatically To display a signal automatically The oscilloscope has an Autoscale feature that automatically sets up the oscilloscope to best display the input signal Using Autoscale requires signals with a frequency greater than or equal to 50 Hz and a duty cycle greater than 1 When you press the Autoscale 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 highest numbered input that has a signal applied If a signal is connected to the external trigger input on the HP 54610 then it is selected as the trigger source Autoscale will in both 50Q and 1M im
21. 1 Lock washer MP1 1251 2485 1 Connector dust cover MP2 1400 1581 1 Cable clamp MP3 54610 41901 1 Large keypad MP4 54610 94305 1 Front panel label MP5 54610 94304 1 Handle Label MP6 54601 00101 1 Deck MP7 54601 07101 I EMI gasket MP8 54601 41902 1 Small rubber keypad MP9 54601 42201 1 Front panel MP10 54601 43701 1 Power switch shaft MP11 54601 64401 1 Cabinet comes with handle and feet installed MP12 54601 44901 1 Handle 3 48 Service Replacing Parts in the Oscilloscope Reference HP Part Qty Description Designator Number MP13 54601 47401 8 Small knob MP14 54601 47402 3 Large knob MP15 54601 47403 1 Intensity knob w1 8120 1521 1 Standard power cord w1 8120 1703 Power cord option 900 United Kingdom Wi 8120 0696 Power cord option 901 Australia w1 8120 1692 Power cord option 902 Europe w1 8120 0698 Power cord option 904 250 V USA Canada w1 8120 2296 Power cord option 906 Switzerland Wi 8120 2957 Power cord option 912 Denmark Wi 8120 4600 Power cord option 917 Africa w1 8120 4754 Power cord option 918 J apan 10073A 2 Passive probes 10X Option 101 Accessory pouch and front panel cover 5041 9411 Pouch 54601 44101 Front panel cover Accessory replacement boards 54650 66502 HP IB interface module 54651 66502 RS 232 C interface module 54652 66501 Parallel output interface module 54654 66501 Training signal board 3 50 Performance Characteristics Performance Characteristics The performan
22. 2 7 sub bright 3 28 subtract waveforms 4 2 Index 2 Index sweep delayed 1 8 to 1 9 4 4 main 1 8 to 1 9 4 4 roll 1 13 speed 1 8 to 1 9 4 4 T temperature characteristics 4 8 warm up 3 5 3 21 test record 3 20 time negative 1 9 time base accuracy 4 4 range 1 8 4 4 setup 1 8 to 1 9 Time key 2 14 time measurements duty cycle 2 16 to 2 18 fall time 2 16 to 2 18 frequency 2 16 to 2 18 period 2 16 to 2 18 rise time 2 16 to 2 18 width 2 16 to 2 18 time reference 2 4 Time Div 2 3 trace memory 2 38 recall 2 38 softkey 2 38 to save 2 38 Trace Mem softkey 2 38 trigger characteristics 4 5 complex waveforms 2 12 external 1 12 4 5 holdoff 1 12 2 12 internal 4 5 level 1 10 2 8 loss of 1 11 maximum input voltage 4 5 mode 1 11 to 1 12 point 1 9 posttrigger information 1 9 pretrigger information 1 9 rearming 2 8 roll 1 13 single 2 8 to 2 9 slope 2 8 source 1 10 1 12 2 8 to verify 3 17 TV 1 11 2 34 2 37 TV mode 2 35 troubleshooting the oscilloscope 3 9 TV trigger 1 11 2 34 2 37 trigger mode 2 35 trigger both fields 2 37 vertical sync 2 37 TV softkeys 1 11 two channel acquisition 2 9 v vernier accuracy 4 3 to 4 4 horizontal 1 9 4 4 vertical 1 7 Vernier softkey 1 7 1 9 vertical calibration 3 25 characteristics 4 2 to 4 3 linearity 3 29 scaling 1 7 sensitivity 1 7 size 3 29 step size 1 7 sync 2 37 window 1 6 to 1
23. 3 24 To adjust the high frequency pulse response 3 26 To adjust the display 3 28 Troubleshooting the Oscilloscope 3 30 To construct your own dummy load 3 31 To check out the oscilloscope 3 32 To check the LVPS Low Voltage Power Supply 3 35 To run the internal self tests 3 36 Replacing Parts in the Oscilloscope 3 39 To replace an assembly 3 40 To remove the handle 3 45 To order areplacement part 3 45 Performance Characteristics Vertical System 4 2 Horizontal System 4 4 Trigger System 4 5 XY Operation 4 6 Display System 4 6 Acquisition System 4 6 Advanced Functions 4 7 Power Requirements 4 7 General 4 8 Glossary Index Contents 2 The Oscilloscope at a Glance The Oscilloscope at a Glance 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 the controls you will use most often The front panel has knobs grey keys and white keys The knobs are used most often and are similar to the knobs on other oscilloscopes The grey keys bring up softkey menus on the display that allow you access to many of the oscilloscope features The white keys are instant action keys and menus are not associated with them Throughout this book the front panel keys are denoted by a box around the name of the key and softkeys are denoted by a change in the text type For example
24. 5A and HP 54656A Test Automation Modules HP 54657A and HP 54678A Measurement Storage Modules HP 5041 9409 Carrying Case HP 5062 7345 Rackmount Kit HP 10079A Camera HP 10070A 1 5 meter 1 1 Probe HP 10020A Resistive Divider Probe Kit HP 10444A 10 1 500 MHz Low Capacitance Miniature Probe 1 6 m iii Options available Option 001 RS 03 Magnetic Interference Shielding Added to CRT Option 002 RE 02 Display Shield Added to CRT Option 005 Enhanced TV Video Trigger Option 101 Accessory Pouch and Front Panel Cover Option 103 Operator s Training Kit HP 54654A Option 104 Carrying Case HP 5041 9409 Option 105 ScopeLink Software HP 54653A Option 106 BenchLink Software HP 34810A Option 090 Deletes Probes Option 908 Rackmount Kit HP 5062 7345 Power Cords see the table of Replaceable Parts in chapter 3 Service iv In This Book This book is the operating and service manual for the HP 54610 oscilloscope and contains four chapters First Time Users Chapter 1 is a quick start guide that gives you a brief overview of the oscilloscope Advanced users Chapter 2 is a series of exercises that guide you through the operation of the oscilloscope Service technicians Chapter 3 contains the service information for the oscilloscope There are procedures for verifying performance adjusting troubleshooting and replacing assemblies in the oscilloscope Reference information Chapter 4 lists the characteristics of
25. 6 V to 16 54 V 15 75 V 787 mV 14 96 V to 16 54 V If the 5 1 V measurement is out of tolerance adjust the 5 1 V adjustment on the power supply The 15 75 V supplies are not adjustable and are dependent upon the 5 1 V supply If adjusting the power supply does not bring all the voltages within tolerance see Troubleshooting the Oscilloscope on page 3 30 in this chapter 15 75V J6 JS 15 75V 45 4 LZ eS Meal 54600E79 3 23 Table 3 9 Service Adjusting the Oscilloscope To perform the self calibration In this procedure you load the default calibration factors to give a known starting point for the firmware calibration However once the default calibration factors are loaded you must perform the remainder of the Sirmware calibration to maintain the accuracy of the oscilloscope Equipment Required Equipment Critical specifications Recommended Model Part Pulse generator 100 kHz 1V p p rise time lt 5 ns HP 8112A Cable BNC 3 feet HP 10503A Cable BNC 9 inches Qty 2 HP 10502A Adapter BNC tee m f f HP 1250 0781 Adapter BNC f f HP 1250 0080 Check the rear panel DC CALIBRATOR output level If you are not sure how to check the DC CALIBRATOR see To check the output of the DC CALIBRATOR on page 3 6 Load the default calibration factors a Set the rear panel CALIBRATION switch to UNPROTECTED u
26. 7 Vertical softkey 3 25 video trigger 2 34 2 37 waveforms 2 34 to 2 37 VITS 2 34 voltage adjustment 3 22 maximum input 1 3 4 2 4 5 measurement accuracy 3 7 measurements 2 19 to 2 22 peak to peak 2 20 Vavg 2 20 Vbase 2 22 vernier 1 7 Vmax 2 22 Vmin 2 22 Vrms 2 20 to 2 21 Vtop 2 22 volts versus time 2 40 volts versus volts 2 40 Volts Div knob 1 7 Ww waveform complex 2 12 saving 2 38 width 2 16 2 18 x XY characteristics 4 6 cursors 2 40 to 2 44 display mode 2 40 to 2 44 measurements 2 42 XY softkey 2 40 Z Z blanking 2 39 Index 3 Index 4 DECLARATION OF CONFORMITY according to ISO IEC Guide 22 and EN 45014 Manufacturer s Name Hewlett Packard Company Manufacturer s Address 1900 Garden of the Gods Road Colorado Springs CO 80901 U S A Declares That the product Product Name Digitizing Oscilloscope Model Number s HP 54610 Product Options All Conforms to the following Product Specifications Safety IEC 348 HD 401 UL 1244 CSA C22 2 No 231 Series M 89 CISPR 11 1990 EN 55011 1991 Group 1 Class A IEC 801 2 1991 EN 50082 1 1992 4 kV CD 8 kV AD IEC 801 3 1984 EN 50082 1 1992 3 V m IEC 801 4 1988 EN 50082 1 1992 1 kV Supplementary Information The product herewith complies with the requirements of the Low Voltage Directive 73 23 EEC and the EMC Directive 89 336 EEC Colorado Springs July 5 1993 John Strathman Quality Mana
27. AC softkey b Connect a multimeter to the rear panel DC CALIBRATOR connector The multimeter should read 0 V 500 uV c Press any key to continue The multimeter should read 5 V 10 mV d Are the DAC voltages correct If yes press any key to continue If not replace the system board 3 Perform the ROM test a Press the ROM softkey b Does the display message say Test Passed If yes press any key to continue If not the display message says Test Failed replace the system board Service Troubleshooting the Oscilloscope Perform the RAM test a b Press the RAM softkey Does the display message say Test Passed If yes press any key to continue If not the display message says Test Failed replace the system board Perform the display test a b c Press Print Utility Press the Self Tst softkey then press the Display softkey Do the half bright and full bright squares appear If yes continue with the steps below If not replace the display d Press any key to continue e Do squares appear in the four corners If yes the display is good If not replace the display Press any key to end the test If you still have the failing symptom replace the system board 3 38 WARNING CAUTION Replacing Parts in the Oscilloscope This section contains instructions for removing and ordering replaceable assemblies Also in this section is a parts list for the assemblies and h
28. Holdoff knob 1 12 horizontal accuracy 4 4 characteristics 4 4 hold 3 29 vernier 1 9 horizontal system 1 9 humidity characteristics 4 8 I input capacitance 4 2 4 5 coupling 1 6 1 10 4 3 4 5 maximum voltage 1 3 4 2 4 5 resistance 4 2 4 5 internal self tests 3 36 internal trigger 4 5 invert 1 7 4 3 Index 1 Index L LF reject 2 32 line trigger 1 10 4 5 trigger TV 4 5 Line softkey Source 1 10 TV 2 35 Load Defaults softkey 3 24 low frequency reject 2 32 2 35 4 5 M main sweep 2 3 Main Delayed key 2 3 marker See cursor measurements math functions 4 2 maximum input voltage trigger 4 5 vertical 4 2 measurement automatic 2 16 to 2 22 clear 2 17 custom 2 23 duty cycle 2 16 to 2 17 fall time 2 16 2 18 frequency 2 14 to 2 15 2 17 period 2 16 to 2 17 phase 2 40 to 2 42 rise time 2 16 2 18 show 2 15 2 17 time 2 16 to 2 18 width 2 16 Mode key 1 11 N narrow pulses 2 10 to 2 11 negative time 1 9 Next Menu softkey 2 15 2 17 2 20 noise asynchronous signal 2 29 to 2 30 reject 2 31 noise reject 4 5 noisy signals to remove from display 2 31 to 2 33 to view 2 29 2 31 to 2 33 nonvolatile memory 2 38 Normal softkey 1 11 o one channel acquisition 2 9 oscilloscope maintenance 3 5 to 3 19 P Peak Det softkey 2 10 peak detect 2 10 peak to peak voltage 2 20 performance tests 3 5 to 3 19 verification 3 5 to 3 19 performance
29. Hz and adjust the output amplitude to achieve a power meter reading of 0 05 mW This corresponds to 100 mV p p Set Time div to 1 ns div Disconnect power meter from divider and connect divider output to External Trigger Input Check for stable triggering adjusting trigger level if necessary Change the signal generator frequency to 25 MHz at output amplitude of 50 mV p p as measured with the HP 54610 Press Voltage then the softkey Vp p Set Time div to 10 ns div Check for stable triggering adjusting trigger level if necessary Record results in Performance Test Record If test fails refer to Troubleshooting the Oscilloscope on page 3 30 HEWLETT PACKARD L Serial No Output of dc calibrator Voltage measurement accuracy HP 54610 Performance Test Record Temperature Result 4 990 V to 5 010 V Test Limits Channel 2 34 14 V to 35 86 V 13 656 V to 14 344 V 6 828 V to 7 172 V 3 414 V to 3 586 V 1 3656 V to 1 4344 V 682 8 mV to 717 2 mV 341 4 mV to 358 6 mV 136 56 mV to 143 44 mV 68 28 mV to 71 72 mV 33 98 mV to 36 02 mV 13 4 mV to 14 6 mV Test Limits lt 3 dB Test Limits Range Reading 5 V Div 35V 2V Div 14V 1V Div 7V 500 mV Div 3 5 V 200 mV Div 1 4V 100 mV Div 700 mV 50 mV Div 350 mV 20 mV Div 140 mV 10 mV Div 70 mV 5 mV Div 35 mV 2 mV Div 14 mV Bandw idth Horizontal At and 1 At accuracy Reading Frequency 10 kHz Period 100 us Frequency 1MHz Period lus Frequency 50 M Hz Perio
30. When Z is low lt 1 3 V Y versus X is displayed when Z is high gt 1 3 V the trace is turned off 2 44 Verifying Oscilloscope Performance 3 5 Adjusting the Oscilloscope 3 21 Troubleshooting the Oscilloscope 3 30 Replacing Parts in the Oscilloscope 3 39 Service Service If the oscilloscope is under warranty you must return it to Hewlett Packard for all service work covered by the warranty See To return the oscilloscope to Hewlett Packard on page 3 4 If the warranty period has expired you can still return the oscilloscope to Hewlett Packard for all service work Contact your nearest Hewlett Packard Sales Office for additional details on service work If the warranty period has expired and you decide to service the oscilloscope yourself the instructions in this chapter can help you keep the oscilloscope operating at optimum performance This chapter is divided into the following four sections e Verifying Oscilloscope Performance on page 3 5 e Adjusting the Oscilloscope on page 3 21 e Troubleshooting the Oscilloscope on page 3 30 e Replacing Parts in the Oscilloscope on page 3 39 Service should be performed by trained service personnel only Some knowledge of the operating controls is helpful and you may find it helpful to read chapter 1 The Oscilloscope at a Glance 3 2 Table 3 1 Service Recommended list of test equipment to service the oscilloscope Equipment Signal gen
31. a faulty assembly with one that has been repaired and performance verified by Hewlett Packard After you receive the exchange assembly return the defective assembly to Hewlett Packard A United States customer has 30 days to return the defective assembly If you do not return the faulty assembly within the 30 days Hewlett Packard will charge you an additional amount This amount is the difference in price between a new assembly and that of the exchange assembly For orders not originating in the United States contact your nearest Hewlett Packard Sales Office for information Service Replacing Parts in the Oscilloscope To order a part in the material list quote the Hewlett Packard part number indicate the quantity desired and address the order to your nearest Hewlett Packard Sales Office To order a part not listed in the material list include the model number and serial number of the oscilloscope a description of the part including its function and the number of parts required Address the order to your nearest Hewlett Packard Sales Office To order using the direct mail order system contact your nearest Hewlett Packard Sales office Within the USA Hewlett Packard can supply parts through a direct mail order system The advantages to the system are direct ordering and shipment from the HP Parts Center in Mountain View California There is no maximum or minimum on any mail order There is a minimum amount for parts orde
32. and vertical cursors from the display Next Menu Replaces the softkey menu with six additional softkey choices 2 20 Operating Your Oscilloscope To make voltage measurements automatically 3 Press the Vrms softkey The oscilloscope automatically measures the rms voltage and displays the result on the display The oscilloscope makes automatic measurements on the first pulse or period in the display Figure 2 10 shows how to use delayed sweep to isolate a pulse for an rms measurement Figure 2 10 1 200 Bzg 2 0087 1 tdu tad a e pee di aas Yrma t 1I 219 im Delayed sweep isolates an area of interest for an rms voltage measurement 2 21 Operating Your Oscilloscope To make voltage measurements automatically Press the Next Menu softkey Another voltage measurement softkey menu appears with six additional choices Four of the softkeys are voltage measurement functions Show Meas show measurement Displays the horizontal and vertical cursors that show where the measurement was taken on the signal Voltage Measurements Four additional voltage measurement choices are available Vmax Vmin Vtop Vbase Previous Menu Returns to the previous softkey menu 2 22 Operating Your Oscilloscope To make cursor measurements To make cursor measurements The following steps guide you through the front panel Cursors key You can use the cursors to make custom voltage or time measurements on the
33. ardware of the oscilloscope that you can order from Hewlett Packard Before working on the oscilloscope read the safety summary at the front of this book Hazardous voltages are on the CRT power supply and display sweep board To avoid electrical shock disconnect the power cord from the oscilloscope Wait at least three minutes for the capacitors in the oscilloscope to discharge before you begin disassembling the oscilloscope Do not replace assemblies with the oscilloscope turned on or damage to the components can occur Fan Front panel Service Replacing Parts in the Oscilloscope To replace an assembly Refer to the exploded view of the oscilloscope figure 3 8 for details on how the oscilloscope fits together To install an assembly follow the instructions in reverse order You will need the following tools to disassemble the oscilloscope T15 TORX driver to remove the oscilloscope from the cabinet and to remove the fan T10 TORX driver to remove the assemblies from the deck Flat blade screwdriver to remove the optional modules and the pouch 9 16 inch nut driver or wrench to remove BNC nut Remove the oscilloscope from the cabinet a b c Turn off the oscilloscope and disconnect the power cable If a module is installed remove it from the oscilloscope Using the T15 TORX driver remove the two screws from the rear of the cabinet Using your thumbs gently push on the two rear panel connectors
34. arest Hewlett Packard Sales Office for additional details Write the following information on a tag and attach it to the oscilloscope e Name and address of owner e Model number e Serial number e Description of service required or failure indications Remove all accessories from the oscilloscope The accessories include the power cord probes cables and any modules attached to the rear of the oscilloscope Do not ship accessories back to Hewlett Packard unless they are associated with the failure symptoms Protect the control panel with cardboard Pack the oscilloscope in styrofoam or other shock absorbing material and place it in a strong shipping container You can use either the original shipping containers or order materials from an HP Sales Office Otherwise pack the oscilloscope in 3 to 4 inches of shock absorbing material to prevent movement inside the shipping container Seal the shipping container securely Mark the shipping container as FRAGILE 3 4 Verifying Oscilloscope Performance This section shows you how to verify the electrical performance of the oscilloscope using the performance characteristics in chapter 4 as the standard The characteristics checked are dc calibrator voltage measurement accuracy bandwidth horizontal accuracy and trigger sensitivity You should verify the performance of the oscilloscope when you first receive it and every 12 months or after 2 000 hours of operation Also mak
35. as ac coupling or low frequency reject are not selected Change the trigger setup and notice that each change affects the status line differently e Press Source Asoftkey menu appears on the display showing the trigger source choices e Toggle each of the softkeys and notice that each key causes the status line to change The HP 54610 has a viewable external trigger which is useful for making timing measurements It is also useful for ensuring that the trigger level is not set to a value that results in trigger instability which causes display to appear unstable One example of this measurement challenge is the ringing on a fast signal e Press External Trigger R A softkey menu appears on the display showing the external trigger choices Toggle each of the softkeys turn the knob and notice how the display changes 1 10 The Oscilloscope at a Glance To trigger the oscilloscope e Press Mode A softkey menu appears on the display with five trigger mode choices e Toggle the Single and TV softkeys and notice that they affect the status line differently You can only select TV if the trigger source is either channel 1 or 2 When the oscilloscope is triggering properly the trigger mode portion of the status line is blank What happens if the oscilloscope loses trigger If Auto Level is the trigger mode Auto flashes in the status line If dc coupled the oscilloscope resets the trigger
36. ce characteristics describe the typical performance of the new HP 54610 oscilloscope You will notice that some of the characteristics are marked as tested these are values that you can verify with the performance tests under Verifying Oscilloscope Performance on page 3 5 Vertical System Channels 1 and 2 Bandwidth dc to 500 MHz 3 dB ac coupled 10 Hz to 500 MHz 3 dB Rise time 700 ps calculated Dynamic range 12 divisions Math functions Channel 1 or Channel 2 Input resistance 1 MQ or 50Q selectable Input capacitance 8 pf Maximum input voltage 250 V dc peak ac 1 Tested see To verify bandwidth on page 3 10 Upper bandwidth reduced 2 MHz per degree C above 35 C 4 2 Performance Characteristics Vertical System Channels 1 and 2 continued Range 2 mV div to 5 V div Accuracy 2 0 of reading Verniers Fully calibrated accuracy 2 0 of reading Cursor accuracy Single cursor accuracy vertical accuracy 1 2 of full scale 0 5 of position value Dual cursor accuracy vertical accuracy 0 4 of full scale Bandwidth limit 30 MHz Coupling Ground ac and dc Inversion Channel 1 and channel 2 CMRR common mode rejection ratio 20 dB at 50 MHz Probe Sense Automatic readout of 1X 10X and 100X probes 1 When the temperature is within 10 C from the calibration range 2 Use a full scale of 80 mV for 2 mV div and 5 mV div ranges 3 Tested see To verify voltage measuremen
37. 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 1 6 The Oscilloscope at a Glance To set up the vertical window 2 Change the vertical setup and notice that each change affects the status line differently You can quickly determine the vertical setup from the status line in the display e Change the vertical sensitivity with the Volts Div knob and notice that it causes the status line to change e Press Ear A softkey menu appears on the display and the channel turns on or remains on if it was already turned on e Toggle each of the softkeys and notice which keys cause the status line to change Channels 1 and 2 have a vernier softkey that allows the Volt Div knob to change the vertical step size in smaller increments These smaller increments are calibrated which results in accurate measurements even with the vernier turned on e To turn the channel off either press 1 a second time or press the left most softkey 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 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
38. characteristics horizontal 4 4 posttrigger 4 4 pretrigger delay 4 4 vertical 4 2 to 4 3 period measurements 2 16 to 2 17 phase measurement 2 40 to 2 42 physical characteristics 4 9 Plot See User s Guide for optional interface module Polarity softkey 2 35 Position knob 1 6 Power requirements 4 7 power supply to adjust 3 22 to 3 23 voltage measurements 3 23 Previous Menu softkey 2 18 Print See User s Guide for optional interface module probe automatic sensing 1 3 compensation 1 4 connection 1 3 trimmer capacitor 1 4 Probe softkey 1 3 pulse measurements 2 16 to 2 18 pulse parameters See time measurements R rearming trigger 2 8 Recall Setup softkey 2 38 recall waveforms 2 38 reject noise 4 5 replacement list 3 48 parts 3 45 rise time measurement 2 16 2 18 Rise Time softkey 2 18 Roll mode 1 13 softkey 1 13 Run 2 7 to 2 8 S sample rate 4 6 save setups 2 39 waveforms 2 38 Save to softkey 2 38 self calibrations 3 24 to 3 25 self tests 3 36 setup saving 2 39 Show Meas softkey 2 15 2 17 signal automatic display 1 5 dc component 1 6 noise 2 29 2 33 single event 2 8 to 2 9 trigger 2 8 to 2 9 single shot bandwidth 2 9 event 2 9 Single softkey 2 8 Slope Coupling key 2 8 softkey 1 2 See keys listed by name Source softkey 1 11 2 14 2 17 2 20 specifications See characteristics status line 1 2 Stop key 2 7 2 9 storage operation 2 6 to
39. d 20 ns Frequency 50 M Hz Period 2ns Trigger sensitivity Internal trigger External trigger 9 899 kHz to 10 10 kHz 98 98 us to 101 01 us 989 8 kHz to 1 0104 M Hz 989 7 ns to 1 010 us 48 43 M Hz to 51 68 M Hz 19 35 ns to 20 65 ns 475 29 M Hz to 527 426 M Hz 1 896 ns to 2 104 ns Test Limits 25 M Hz at 0 35 divisions 500 M Hz at 1 division 500 M Hz at 100 mV p p 25M Hzat50mV p p Channel 2 3 20 WARNING CAUTION Adjusting the Oscilloscope This section explains how to adjust the oscilloscope so that it is at optimum operating performance You should perform the hardware adjustments periodically as indicated below e Hardware at 12 months or 2 000 hours of operation e Firmware at 6 months or 1000 hours of operation or if ambient temperature is greater than 10 C from the calibration temperature or if the user desires to maximize the measurement accuracy The amount of use environmental conditions and your past experience with other instruments can help you to determine if you need a shorter adjustment interval Make sure you allow the oscilloscope to warm up for at least 30 minutes before you start the adjustments The maintenance described in this section is performed with power supplied to the oscilloscope and with the protective covers removed Only trained service personnel who are aware of the hazards involved should perform the maintenance Whenever possible p
40. e To use delayed sweep To use delayed sweep Delayed sweep is a magnified portion of the main sweep You can use delayed sweep to locate and horizontally expand part of the main sweep for a more detailed high resolution analysis of signals The following steps show you how to use delayed sweep Notice that the steps are very similar to operating the delayed sweep in analog oscilloscopes 2 Press Main Delayed Press the Delayed softkey The screen divides in half The top half displays the main sweep and the bottom half displays an expanded portion of the main sweep This expanded portion of the main sweep is called the delayed sweep The top half also has two solid vertical lines called markers These markers show what portion of the main sweep is expanded in the lower half The size and position of the delayed sweep are controlled by the Time Div and Delay knobs The Time Div next to the symbol is the delayed sweep sec div The delay value is displayed for a short time at the bottom of the display e To display the delay value of the delayed time base either press Main Delayed or turn the Delay knob e To change the main sweep Time Div you must turn off the delayed sweep 2 3 Figure 2 1 Operating Your Oscilloscope To use delayed sweep Since both the main and delayed sweeps are displayed there are half as many vertical divisions so the vertical scaling is doubled Notice
41. e sure you allow the oscilloscope to operate for at least 30 minutes before you begin the following procedures SSS wT Perform self calibration first For the oscilloscope to meet all of the verifications tests in the ambient temperature where it will be used the self calibration tests described on page 3 24 should first be performed Allow the unit to operate for at least 30 minutes before performing the self calibration Each procedure lists the recommended equipment for the test You can use any equipment that meets the critical specifications However the procedures are based on the recommended model or part number On page 3 20 of this chapter is a test record for recording the test results of each procedure Use the test results to gauge the performance of the oscilloscope over time 3 5 Table 3 2 Service Verifying Oscilloscope Performance To check the output of the DC CALIBRATOR In this test you measure the output of the DC CALIBRATOR with a multimeter The DC CALIBRATOR is used for self calibration of the oscilloscope The accuracy is not specified but it must be within the test limits to provide for accurate self calibration Test limits 5 000 V 10 mV and 0 000 V 500 LV Equipment Required Equipment Critical specifications Recommended Model Part Digital M ultimeter 0 1 mV revolution better than 0 01 HP 34401A accuracy Cable BNC HP 10503A Connect a multimeter to the rear panel DC
42. e trigger level makes the triggering stable the test still passes If adjusting the trigger does not help see Troubleshooting the Oscilloscope on page 3 30 Verify the trigger sensitivity at 1 division for the frequency shown below a b c Change the output of the signal generator to 500 MHz and set amplitude to about 100 mV Press Autoscale Decrease the output of the signal generator until there is 1 vertical division of the signal displayed The trigger should be stable If the triggering is not stable try adjusting the trigger level If adjusting the trigger level makes the triggering stable the test still passes If adjusting the trigger does not help see Troubleshooting the Oscilloscope on page 3 30 5 Repeat steps 1 through 4 for channel 2 3 18 External Trig Sensitivity Service Verifying Oscilloscope Performance 6 Verify the external trigger sensitivity at 500 MHz at 100 mV p p and at 25 MHz at 50 mV p p a Press Source then press the Ext softkey b Press External Trigger then select external trigger with input coupling of 50Q Press 1 then select signal input coupling of 50 Q d Using the power splitter connect one signal generator output to the channel 1 input and the other signal generator output to the power sensor Set the power meter Cal Factor to the 500 MHz value from the chart on the power sensor Set signal generator frequency to 500 M
43. erator Digital multimeter Oscilloscope Power meter and Power sensor Power supply Pulse generator Pulse generator Power Splitter Shorting cap Time M ark Generator Adapter Adapter Adapter Adapter Adapter Adapter Cable Cable Cable Critical specifications 1 to 500 M Hz at 200 mV high stability timebase 0 1 mV resolution better than 0 01 accuracy 100 M Hz 1 to 500 M Hz 3 accuracy 14 mV to 35 Vdc 0 1 mV resolution Rise time lt 175 ps 10 kHz 500 mV p p rise time lt 5 ns Outputs differ lt 0 15 dB BNC Stability 5 ppm after 30 minutes SMA f to BNC m BNC f f BNC tee m f f N m to BNC f Qty 3 BNC f to dual banana m Type N m to BNC m BNC Qty 3 BNC 9 inches Qty 2 Type N m 24 inch P Use for Performance Verification A Use for Adjustments T Use for Troubleshooting Recommended M odel Part HP 8656B Option 001 HP 34401A HP 54600A HP 436A and HP 8482A HP 6114A PSPL1107B TD and PSPL 1110B Driver HP 8112A HP 11667B HP 1250 0774 Tektronix TG501A and TM 503B HP 1250 1787 HP 1250 0080 HP 1250 0781 HP 1250 0780 HP 1251 2277 HP 1251 0082 HP 10503A HP 10502A HP 11500B Use P A T o o o o od gt o oo n o gt D gt Dy gt D gt 3 3 Service To return the oscilloscope to Hewlett Packard To return the oscilloscope to Hewlett Packard Before shipping the oscilloscope to Hewlett Packard contact your ne
44. erform the procedures with the power cord removed from the oscilloscope Read the safety summary at the back of this book before proceeding Do not disconnect any cables or remove any assemblies with the power applied to the oscilloscope or damage to the oscilloscope can occur Table 3 8 Service Adjusting the Oscilloscope To adjust the power supply On the power supply there is only one adjustment and that is for the 5 1 V The other voltages are based on the 5 1 V adjustment In this procedure you use a multimeter to measure the 5 1 V and if necessary you adjust the supply to within tolerance Equipment Required Equipment Critical specifications Recommended Model Part Digital multimeter 0 1 mV resolution accuracy 0 05 HP 34401A Set up the oscilloscope for the voltage adjustment a Turn off the oscilloscope and disconnect power cable b Remove the cover from the oscilloscope as described in To replace an assembly on page 3 40 of this chapter c Place the oscilloscope on its side d Connect the negative lead of the digital multimeter to a ground point on the oscilloscope e Reconnect power cable f Turn on the oscilloscope 3 22 Figure 3 1 Service Adjusting the Oscilloscope 2 Measure the power supply voltages at L1 L2 and L3 on the system board Make sure that the voltage measurements are within the following tolerances 5 1 V 150 mV 4 95 V to 5 25 V 15 75 V 787 mV 14 9
45. ess to the trace storage keys Trace Mem trace memory One of two pixel memory locations used for storing traces TV Allows access to the TV or video trigger keys Vernier Vernier allows a calibrated fine adjustment with the channel 1 and 2 Volts Div knob and the time base Time Div knob Voltage Allows access to the auto matic voltage measurement keys Volts Div Changes the vertical scaling in a 1 2 5 step sequence from 2 mV to5 V XY Changes the display to a volts versus volts display Glossary 4 Index A ac coupling 1 6 1 10 4 3 4 5 accuracy cursors 4 3 to 4 4 horizontal 4 4 vertical 4 3 acquisition characteristics 4 6 Active Cursor 2 23 adjustments display 3 28 to 3 29 high frequency 3 21 to 3 29 low frequency 3 21 to 3 29 power supply 3 22 to 3 23 advance functions 4 7 altitude characteristics 4 8 ambient temperature 3 21 4 8 assembly replacement 3 40 attenuation factor of probe 1 3 Auto 1 11 auto level 1 11 Auto Level softkey 1 11 Auto softkey 1 11 automatic measurements time 2 16 to 2 18 voltage 2 19 to 2 22 automatic probe sensing 1 3 autoscale characteristics 4 7 to autoscale 1 5 Undo 1 5 autostore 2 6 to 2 7 2 9 to 2 10 Av 2 33 Average softkey 2 33 averaging 2 33 4 6 B bandwidth characteristics 4 2 limit 4 3 single shot 2 9 4 6 to verify 3 10 XY 4 6 Cc calibration adjustments 3 21 to 3 29 delay 3 25 self 3 24 to 3 25
46. fly 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 k a a a Roll mode operating hints M ath functions averaging and peak detect are not available Holdoff and horizontal delay are not active Both a free running nontriggered display and a triggered display available in the single mode only are available Itis available at sweep speeds of 200 ms div and slower Operating Your Oscilloscope Operating Your Oscilloscope By now you are familiar 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 looking at the status line If you are unfamiliar with this information we recommend you read chapter 1 The Oscilloscope at a Glance This chapter takes you through two new groups of front panel keys STORAGE and the group of keys that contains the Measure Save Recall and Display keys You will also add to your knowledge of the HORIZONTAL keys by using delayed sweep We recommend you perform all of the following exercises so you become familiar with the powerful measurement capabilities of your oscilloscope 2 2 1 Connect a signal to the oscilloscope and obtain a stable display Operating Your Oscilloscop
47. ger European Contact Your local Hewlett Packard Sales and Service Office or Hewlett Packard GmbH Department ZQ Standards Europe Herrenberger Strasse 130 71034 B blingen Germany FAX 49 7031 143143 Copyright Hewlett Packard Company 1993 1994 All Rights Reserved Reproduction adaptation or translation without prior written permission is prohibited except as allowed under the copyright laws Document Warranty The information contained in this document is subject to change without notice Hewlett Packard makes no warranty of any kind with regard to this material including but not limited to the implied warranties or merchantability and fitness for a particular purpose Hewlett Packard shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing performance or use of this material Complete product warranty information is given at the end of this manual Safety This apparatus has been designed and tested in accordance with IEC Publication 348 Safety Requirements for Measuring Apparatus and has been supplied in a safe condition This is a Safety Class I instrument provided with terminal for protective earthing Before applying power verify that the correct safety precautions are taken see the following warnings In addition note the external markings on the instrument that are described under Safety Symbols Wa
48. he vertical sync pulse in both TV fields at the same time This allows you to view noninterlaced video signals which are common in computer monitors To trigger on both sync pulses press Field 1 and Field 2 at the same time TV trigger operating hints The color burst changes phase between odd Fields 1 and 3 and even Fields 2 and 4 It looks double triggered Increase the holdoff to greater than the frame width to finetune your trigger stability For example use a holdoff value of around 63 ms for NTSC and around 76 ms for PAL When looking at live video usually a field use peak detect to improve the appearance of the display When making cursor measurements use Autostore since you are usually looking for pulse flatness and extremes When using line trigger use minimum holdoff to display all the lines Due to the relationship between the horizontal and vertical sync frequencies the display looks like itis untriggered but itis very useful for TV waveform analysis and adjustment because all of the lines are displayed N A w oo Operating Your Oscilloscope To save or recall traces To save or recall traces The oscilloscope has two pixel memories for storing waveforms The following exercise guides you through how to store and recall waveforms from pixel memories Connect a signal to the oscilloscope and obtain a stable display Press Trace A softkey menu appears with five softkey select
49. igger sensitivity In this test you verify the trigger sensitivity by applying 25 MHz to the oscilloscope The amplitude of the signal is decreased to the specified levels then you check to see if the oscilloscope is still triggered You then repeat the process at the upper bandwidth limit Test limits Internal trigger dc to 25 MHz 0 35 div or 3 5 mV p p dc to 500 MHz 1 div or 10 mV p p External trigger dc to 25 MHz 50 mV p p dc to 500 MHz gt 100 mV p p Equipment Required Equipment Critical specifications Signal generator 25 MHz and 500 M Hz sine waves Power splitter Outputs differ lt 0 15 dB Cable BNC Qty 3 Adapter N m to BNC f Qty 3 Power meter and 1 to 500 M Hz 3 Power sensor Recommended Model Part HP 8656B Option 001 HP 11667B HP 10503A HP 1250 0780 HP 436A and HP 8482A Internal Trig Sensitivity 1 Service Verifying Oscilloscope Performance Press setup then press the Default Setup softkey Connect the signal generator to channel 1 Verify the trigger sensitivity at 25 MHz and 0 35 divisions a b c d Set the signal generator to 25 MHz and about 50 mV Press Autoscale Press 1 to select channel 1 then select 50Q input impedance Decrease the output of the signal generator until there is 0 35 vertical divisions of the signal displayed The trigger should be stable If the triggering is not stable try adjusting the trigger level If adjusting th
50. ions Four of the softkeys are trace memory functions Trace Selects memory 1 or memory 2 Trace Mem Turns on or off the selected memory Save to Saves the waveform to the selected memory The front panel setup is saved to a separate memory location Clear Erases the selected memory Recall Setup Recalls the front panel setup that was saved with the waveform Toggle the Trace softkey to select memory 1 or memory 2 Press the Save to softkey The current display is copied to the selected memory Turn on the Trace Memsoftkey to view the stored waveform The trace is copied from the selected trace memory and is displayed in half bright video 2 38 Operating Your Oscilloscope To save or recall front panel setups The automatic measurement functions do not operate on stored traces Remember the stored waveforms are pictorial information rather than stored data e Ifyou have not changed the oscilloscope setup use the cursors to make the measurements e If you have changed the oscilloscope setup press the Recall Setup softkey Then use the cursors to make the measurements Trace memory operating hint The standard oscilloscope has volatile trace memories When you add an interface module to the oscilloscope the trace memories become nonvolatile To save or recall front panel setups There are 16 memories for storing front panel setups Saving front panel setups can save you time in situations where se
51. lead of the multimeter to a ground point on the oscilloscope Connect the power cord and turn on the oscilloscope Measure the power supply voltages at L3 L4 and L5 on the system board See LVPS figure on page 3 23 5 1 V 150 mV 4 95 V to 5 25 V 15 75 V 787 mV 414 96 V to 16 54 V 15 75 V 787 mV 14 96 V to 16 54 V If the 5 1 V measurement is out of the test limits adjust the 5 1 V adjustment on the power supply The 15 V supplies are not adjustable and are dependent upon the 5 1 V supply Blown fuse If the fuse is blown in the power supply the power supply is defective Replace the power supply Service Troubleshooting the Oscilloscope To run the internal self tests Perform the keyboard test a Press Print Utility b Press the Self Tst softkey then press the Keyboard softkey A pictorial diagram of the front panel will appear on the display c Press each key and notice that when you press a key a corresponding block on the display fills in d Rotate the knobs except the intensity and notice that an arrow appears on the display that points in the direction you rotate the knob e Doall the keys and knobs work If yes Press the St op softkey two or three times the display indicates how many times then go to step 2 If not replace the keyboard and keyboard assembly 3 36 Service Troubleshooting the Oscilloscope 2 Check the output level of the DAC a Press the D
52. lloscope To capture glitches or narrow pulses Use Autostore for the following cases waveforms that are changing waveforms that you want to view and compare with stored waveforms and narrow pulses or glitches that occur infrequently but require the use of sweep speeds outside the range of peak detect e Press Autostore You can use peak detect and Autostore together Peak detect captures the glitch while Autostore retains the glitch on the display in half bright video 3 Characterize the glitch with delayed sweep Peak detect functions in the main sweep only not in the delayed sweep To characterize the glitch with delayed sweep follow these steps e Press Main Delayed ls Next press the Delayed softkey e To obtain a better resolution of the glitch expand the time base e To set the expanded portion of the main sweep over the glitch use the Delay knob e To characterize the glitch use the cursors or the automatic measurement capabilities of the oscilloscope 2 11 Operating Your Oscilloscope To trigger on a complex waveform To trigger on a complex waveform The difficulty in viewing a complex waveform is triggering on the signal Figure 2 3 shows a complex waveform that is not synchronized with the trigger The simplest trigger method is to trigger the oscilloscope on a sync pulse that is associated with the waveform See To trigger the oscilloscope on page 1 10 If there is no sync pulse
53. mark generator to 1 us and change the time base to 200 ns div Adjust the trigger level to obtain a stable display Press Time then press the Freq and Period softkeys You should measure the following Frequency 1 MHz test limits are 989 8 kHz to 1 0104 MHz Period 1 us test limits are 989 7 ns to 1 010 us If the measurements are not within the test limits see Troubleshooting the Oscilloscope on page 3 30 Change the time mark generator to 20 ns and change the time base to 5 ns div Adjust the trigger level to obtain a stable display Press Time then press the Freq and Period softkeys You should measure the following Frequency 50 MHz test limits are 48 43 MHz to 51 68 MHz Period 20 ns test limits are 19 35 ns to 20 65 ns If the measurements are not within the test limits see Troubleshooting the Oscilloscope on page 3 30 Service Verifying Oscilloscope Performance 8 Change the time mark generator to 2 ns and change the time base to 1 ns div Adjust the trigger level to obtain a stable display 9 Press Time then press the Freq and Period softkeys You should measure the following Frequency 500 MHz test limits are 475 29 MHz to 527 426 MHz Period 2 ns test limits are 1 896 ns to 2 104 ns If the measurements are not within the test limits see Troubleshooting the Oscilloscope on page 3 30 3 16 Table 3 7 Service Verifying Oscilloscope Performance To verify tr
54. ne graticule in from the left side of the display If the time reference softkey is set to center the V is located at the center of the display The delay number tells you how far the reference point V is located from the trigger point V All events displayed left of the trigger point Y happened before the trigger occurred and these events are called pretrigger information or negative time 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 is dependent on the sweep speed selected See Horizontal System in chapter 4 for more details The Oscilloscope at a Glance To trigger the oscilloscope To trigger the oscilloscope The following exercise guides you through the trigger keys knobs and status line Turn the trigger Level knob and notice the changes it makes to the display As you turn the Level knob or press a trigger menu key for a short time two things happen on the display First the trigger level is displayed in inverse video 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 if the trigger source is turned on a line is displayed showing the location of the trigger level as long
55. ns of the manual Update packages which are issued between editions contain additional and replacement pages to be merged into the manual by you The dates on the title page change only when a new edition is published A software or firmware code may be printed before the date This code indicates the version level of the software or firmware of this product at the time the manual or update was issued Many product updates do not require manual changes and conversely manual corrections may be done without accompanying product changes Therefore do not expect a one to one correspondence between product updates and manual updates
56. of the main sweep to be expanded by the delayed sweep Delayed Gives an expanded view of the main sweep Deskewing The removal of time offset errors between two signals The error is typically due to differen ces in either cable lengths or characteristics Also called Time Null Display Allows selection of either normal peak detect or averaged dis play modes Erase Clears the display Glossary 1 Glossary External Trigger Extra input to the oscilloscope normally used for triggering The external trigger is viewable on the HP 54610 allowing it to be used as an additional channel Field 1 Triggers on the field 1 por tion of the video signal Field 2 Triggers on the field 2 por tion of the video signal HF Reject high frequency reject Adds a low pass filter with a 3 dB point at 50 KHz to the trigger path Holdoff Keeps the trigger from rearming for an amount of time set by the holdoff knob Internal Trigger The oscilloscope triggers from a channel input that you choose Invert Invert changes the polarity of the waveform and is available for channels 1 and 2 When the oscillo scope is triggered on the signal to be inverted the trigger is also inverted Level Front panel knob that chan ges the trigger level LF Reject ow frequency reject Adds a high pass filter with a 3 dB point at 50 KHz to the trigger path Line In TV trigger mode the oscil loscope triggers on the TV line sync
57. olding the power supply board to the deck f Slide the power supply board towards the front panel about a half an inch Slip the keyhole slots on the power supply board off of the pins on the deck Keyboard Figure 3 7 Service Replacing Parts in the Oscilloscope a Remove the front panel b Remove all the knobs by pulling straight out c Flex the bezel of the front panel to unsnap the small keyboard under the display opening d Using the T10 TORX driver remove the three screws from the large keyboard Make sure that when you reinstall these screws that you use the correct parts If longer screws are used they can damage the front panel label e Press down on the top of the keyboard and rotate the bottom of the keyboard out When installing the keyboard make sure that the probe calibration cable is kept away from the keyboard cable or noise can occur in the probe adjust signal See figure 3 7 for positioning the keyboard cable Probe calibration cable Keyboard cable 54600E34 3 44 Service Replacing Parts in the Oscilloscope To remove the handle e Rotate the handle down until it is just past the last detent position about 1 2 inch before the handle touches the bottom of the oscilloscope then pull the sides of the handle out of the cabinet To order a replacement part The system board is part of an exchange program with Hewlett Packard The exchange program allows you to exchange
58. on 60 full screens sec independant of the number of waveforms being displayed Single shot bandwidth 2 MHz single channel 1 MHz dual channel Acquisition modes Normal Peak Detect and Average Peak detect 50 ns glitch capture 100 ns dual channel Operates at sweep speeds of 50 us div and slower Average Number of averages selectable at 8 64 and 256 Roll Mode At sweep speeds of 200 ms div and slower waveform data moves across the display from right to left with no dead time Display can be either free running non triggered or triggered to stop on a trigger event 4 7 Performance Characteristics Advanced Functions Advanced Functions Automatic measurements measurements are continuously updated Voltage Vavg Vrms Vp p Vtop Vbase Vmin Vmax Time Frequency period width width duty cycle rise time and fall time Cursor Measurements Four cursors can be positioned on the display to make time voltage measurements The cursors will track changes in position and delay controls Readout in V T Setup functions Autoscale Sets vertical and horizontal deflections and trigger level Requires a signal with a frequency 250 Hz duty cycle gt 1 and voltage level channels 1 and 2 gt 20 mVp p external trigger gt 100 mVp p Save Recall 16 front panel setups can be stored and recalled from nonvolatile memory Trace memory Two volatile pixel memories allow storage of multi valued waveforms Power Requirement
59. onstitutes a definite safety hazard e Do not install substitute parts or perform any unauthorized modification to the instrument e Capacitors inside the instrument may retain a charge even if the instrument is disconnected from its source of supply e Use caution when exposing or handling the CRT Handling or replacing the CRT shall be done only by qualified maintenance personnel Safety Symbols A Instruction manual symbol the product is marked with this symbol when it is necessary for you to refer to the instruction manual in order to protect against damage to the product Hazardous voltage symbol Earth terminal symbol Used to indicate a circuit common connected to grounded chassis WARNING The Warning sign denotes a hazard It calls attention to a procedure practice or the like which if not correctly performed or adhered to could result in personal injury Do not proceed beyond a Warning sign until the indicated conditions are fully understood and met CAUTION The Caution sign denotes a hazard It calls attention to an operating procedure practice or the like which if not correctly performed or adhered to could result in damage to or destruction of part or all of the product Do not proceed beyond a Caution symbol until the indicated conditions are fully understood or met Hewlett Packard P O Box 2197 1900 Garden of the Gods Road Colorado Springs CO 80901 P
60. orm is displayed in half bright and the most recent trace is displayed in full bright Autostore is useful in a number of applications e Displaying the worst case extremes of varying waveforms e Capturing and storing a waveform e Measuring noise and jitter e Capturing events that occur infrequently 2 6 Operating Your Oscilloscope To use storage oscilloscope operation 3 Using the position knob in the Vertical section of the front panel move the trace up and down about one division Notice that the last acquired waveform is in full bright and the previously acquired waveforms are displayed in half bright e To characterize the waveforms use the cursors See To make cursor measurements on page 2 23 e To clear the display press Erase e To exit the Autostore mode press either Run or Autostore Summary of storage keys Run The oscilloscope acquires data and displays the most recent trace Stop The display is frozen Autostore The oscilloscope acquires data displaying the most recent trace in full bright and previously acquired waveforms in half bright Erase Clears the display 2 7 Operating Your Oscilloscope To capture a single event To capture a single event To capture a single event you need some 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
61. p position b Press Print Utility then press the Self Cal Menu softkey c Pressthe Load Defaults softkey 3 24 Vertical self cal Delay self cal 3 6 Service Adjusting the Oscilloscope After the message Default calibration factors loaded is displayed on the lower left side of the display press the Vertical softkey Follow the instructions on the display then press the Continue softkey The display prompts instruct you to connect the rear panel DC CALIBRATOR output first to external trigger then to channel 1 then to channel 2 When the message Press Continue to return to calibration menu appears on the display press the continue softkey Connect a pulse generator set to 100 kHz and 1 V p p and with a rise time less than 5 ns to channels 1 and 2 Set the oscilloscope s input impedance to 50Q Make sure you use the HP 10502A cables to ensure equal cable lengths Press the Delay softkey then follow the instructions on the display The display will instruct you to connect the signal simultaneously to channels 1 and 2 then to channel 1 and external trigger and finally to channel 2 and and external trigger Set the rear panel CALIBRATION Switch to PROTECTED Table 3 10 ao Fw N Service Adjusting the Oscilloscope To adjust the high frequency pulse response In this procedure you adjust the high frequency pulse response for each channel
62. pedance modes reset the Coupling to DC the Bandwidth Limit BW Lim to Off all Verniers to Off and Signal Inversion Invert to Off Input protection in 50Q mode is not affected by Autoscale Connect a signal to the oscilloscope Press Autoscale When you press the Autoscale key the oscilloscope changes the front panel setup to display the signal However if you pressed the Autoscale key unintentionally you can use the Undo Autoscale feature To use this feature perform the following step e Press Setup Next press the Undo Autoscale softkey The oscilloscope returns to the configuration in effect before you pressed the Autoscale key The Oscilloscope at a Glance To set up the vertical window To set up the vertical window The following exercise guides you through the vertical keys knobs and status line Center the signal on the display with the Position knob The Position knob moves the signal vertically and it is calibrated Notice that as you turn the Position 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 right side of the display moves in conjunction with the Position knob e a vo dcodaotTdNYrT M easurement hints If the channel is dc coupled you can quickly measure the dc component of the signal by simply noting its distance from the ground symbol If the
63. ple the flip flop is clocked on the rising edge 1 Set time skew to remove errors introduced by different cables for this time interval measurement 2 Connect the D input of the flip flop to the External Trigger on your oscilloscope Set the scope to trigger on the rising edge 3 Connect the flip flop s clock signal to channel 1 4 Connect the Q output to channel 2 of the oscilloscope 5 Press Autoscale then turn on the External Trigger so that it is viewable 6 Use the time cursors to measure the difference between the rising edge of the clock and the D input to determine setup and hold time 1 Q 1 00V 2 Q 2 00 E Q 2Y p2 002 50 037 E STOP a a a E E E a O S E D O E E S E r r O O ti 27 00ns te 5 000ns t 32 00ns iz t 31 25MH2 Setup time measurement channel 1 clock channel 2 Q output and External Trigger D input 2 28 Operating Your Oscilloscope To view asynchronous noise ona signal To view asynchronous noise on a signal The following exercise shows how to use the oscilloscope to view asynchronous noise on a signal that is not synchronous to the period of the waveform 1 Connect a noisy signal to the oscilloscope and obtain a stable display Figure 2 18 shows a waveform with asynchronous noise at the top of the pulse Figure 2 18 1 50 07 50 02 Asynchronous noise at the top of the pulse Figure 2 19 Operating Your Oscilloscope To view a
64. pulses As a trigger source the oscil loscope triggers off of the power line frequency Main Sets the oscilloscope to a volts vs time display that displays the main time base sweep Mode Allows you to select one of five trigger modes Auto level Auto Normal Single TV Noise Rej noise reject Decreases the trigger sensitivity to reduce the triggering on signal noise Normal Ifa trigger signal is present and the trigger conditions are met a waveform is displayed If there is no trigger signal the oscillo scope does not trigger and the display is not updated Peak Det peak detect Allows detection of signal extremes as the sample rate is decreased in the 5 s to 50 ms div time base settings Polarity Selects either positive or negative TV sync pulses Position Knob that moves the sig nal vertically on the display Glossary 2 Print Utility Allows access to the module menus and service menus Probe Allows selection of 1 10 or 100 to match a probe s division ratio so that the vertical scaling and volt age measurements reflect the actual voltage levels at the tip of the probe Probe Sense Automatically detects the division ratio of the probe Recall Recalls a selected front panel setup that you saved to one of 16 memory locations Memory selec tion is with either a softkey or the knob closest to the Cursors front panel key Recall Setup Recalls the front panel setup that was saved with a
65. quency reject LF Reject adds a high pass filter with the 3 dB point at 50 kHz see figure 2 21 Use LF reject to remove low frequency signals such as power line noise from the trigger path 3 dB down point Figure 2 22 dc 54600W03 LF reject Noise reject increases the trigger hysteresis band By increasing the trigger hysteresis band you reduce the possibility of triggering on noise However this also decreases the trigger sensitivity so that a slightly larger signal is required to trigger the oscilloscope 1 20 00 g o 00s 2008 1 RUN a BPR 4 L Prd Ta a p Ba F E F L e F s i 4 L i 4 ae 4 x Je f r f ra ab 4 cre He oil ias a Random noise on the displayed waveform 2 32 Figure 2 23 Operating Your Oscilloscope To reduce the random noise on a signal 3 Use averaging to reduce noise on the displayed waveform To use averaging follow these steps e Press Display the press the Average softkey Notice that Av appears in the status line e Toggle the Average softkey to select the number of averages that best eliminates the noise from the displayed waveform The Av letters in the status line indicate how much of the averaging process is finished by turning to inverse video as the oscilloscope performs averaging The higher the number of averages the more noise that is removed from the display However the higher the number of averages the slower
66. r channel 2 Full scale is defined as 80 mV on the 5 mV div and 2 mV div ranges 3 9 Table 3 5 Service Verifying Oscilloscope Performance To verify bandwidth In this test you verify bandwidth by using a power meter and power sensor to set output of a signal generator at 1 MHz and the upper bandwidth limit You use the peak to peak voltage at 1 MHz and the upper bandwidth limit to calculate the bandwidth response of the oscilloscope Test limits HP 54610 all channels 3 dB dc to 500 MHz ac coupled 10 Hz to 500 MHz Equipment Required Equipment Critical specifications Signal generator 1 to 500 M Hz at 200 mV Power meter and 1 to 500 M Hz 3 accuracy Power Sensor Power Splitter Outputs differ by lt 0 15 dB Cable Type N m 24 inch Adapter Type N m to BNC m Recommended M odel Part HP 8656B opt 001 HP 436A and HP 8482A HP 116678 HP 115008 HP 1251 0082 3 10 Service Verifying Oscilloscope Performance 1 Connect the equipment a Connect the signal generator to the input of the power splitter b Connect the power sensor to one output of the power splitter and connect channel 1 of the oscilloscope to the other power splitter output Set the oscilloscope input impedance to 500 2 Set up the oscilloscope a Press b Set th c Press d Press Setup then press the Default Setup softkey e time base to 500 ns div 1 to select channel 1 then select 50Q input and 100 mV div Di
67. reater than 5 Vrms is detected However the inputs could still be damaged depending on the time constant of the signal Auto A trigger mode that produces a baseline display if the trigger conditions are not met If the trigger frequency is less than 25 Hz a free running display will result even if the level and slope conditions are met Auto Level The oscilloscope sets the trigger point to the 50 amplitude point on the displayed waveform If there is no signal present a baseline is displayed Autoscale Front panel key that automatically sets up the oscillo scope to display a signal Autostore displays the stored waveforms in half bright and the most recent trace is displayed in full bright Baseline Free running trace on the display when no signal is applied and the trigger mode is set to auto or auto level BW Lim Bandwidth Limit Limits the displayed bandwidth of the selected channel to 30 MHz and is available for channels 1 and 2 only This feature is useful for viewing noisy signals CoupIng Coupling This changes the input coupling Channels 1 and 2 and the External Trigger allow dc ac or ground Cursors Horizontal and vertical markers used for making custom volt age and time measurements Delay In main sweep the delay knob moves the sweep horizontally and indicates how far the time refer ence is from the trigger point In delayed sweep the delay knob moves the starting point of the portion
68. red through a local Hewlett Packard Sales Office when the orders require billing and invoicing Transportation costs are prepaid there is a small handling charge for each order and no invoices In order for Hewlett Packard to provide these advantages a check or money order must accompany each order Mail order forms and specific ordering information are available through your local Hewlett Packard Sales Office Addresses and telephone numbers are located in a separate document shipped with the instrument 3 46 Service Replacing Parts in the Oscilloscope Figure 3 8 MP9 MP4 FRONT PANEL LABELS 1 A2 CS ql x amp Sk Doe oO e INS re OA 5 WUA VG Fas r H2 2 54600E 87 Exploded view of oscilloscope show ing reference designators 3 47 Table 3 14 Service Replacing Parts in the Oscilloscope Replaceable Parts Reference HP Part Qty Description Designator Number Al 0950 2125 1 Power supply assembly A2 2090 0316 1 Display assembly A3 54610 66508 1 System board includes A D but not attenuators A3 54610 69508 Exchange system board includes A D but not attenuators A4 54610 66504 1 Keyboard A5 54610 63401 1 Attenuator assembly A5 54610 69401 1 Attenuator assembly exchange Bl 3160 0619 1 Fan H1 0515 0372 11 Machine screw M3X 8 H2 0515 0380 5 Machine screw M4 X 10 H3 0515 0430 5 Machine screw M3X 6 H4 1250 2075 1 RF connector nut 0 5 inch H5 2190 0068
69. rning e Before turning on the instrument you must connect the protective earth terminal of the instrument to the protective conductor of the mains power cord The mains plug shall only be inserted in a socket outlet provided with a protective earth contact You must not negate the protective action by using an extension cord power cable without a protective conductor grounding Grounding one conductor of a two conductor outlet is not sufficient protection e Only fuses with the required rated current voltage and specified type normal blow time delay etc should be used Do not use repaired fuses or short circuited fuseholders To do so could cause a shock of fire hazard e Service instructions are for trained service personnel To avoid dangerous electric shock do not perform any service unless qualified to do so Do not attempt internal service or adjustment unless another person capable of rendering first aid and resuscitation is present e Ifyou energize this instrument by an auto transformer for voltage reduction make sure the common terminal is connected to the earth terminal of the power source e Whenever it is likely that the ground protection is impaired you must make the instrument inoperative and secure it against any unintended operation e Do not operate the instrument in the presence of flammable gasses or fumes Operation of any electrical instrument in such an environment c
70. roduct Warranty This Hewlett Packard product has a warranty against defects in material and workmanship for a period of three years from date of shipment During the warranty period Hewlett Packard Company will at its option either repair or replace products that prove to be defective For warranty service or repair this product must be returned to a service facility designated by Hewlett Packard For products returned to Hewlett Packard for warranty service the Buyer shall prepay shipping charges to Hewlett Packard and Hewlett Packard shall pay shipping charges to return the product to the Buyer However the Buyer shall pay all shipping charges duties and taxes for products returned to Hewlett Packard from another country Hewlett Packard warrants that its software and firmware designated by Hewlett Packard for use with an instrument will execute its programming instructions when properly installed on that instrument Hewlett Packard does not warrant that the operation of the instrument software or firmware will be uninterrupted or error free Limitation of Warranty The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by the Buyer Buyer supplied software or interfacing unauthorized modification or misuse operation outside of the environmental specifications for the product or improper site preparation or maintenance No other warranty is expres
71. rsor to the top of the signal and set Y1 to the bottom of the signal Note the AY value at the bottom of the display In this example we are using the Y cursors but you could have used the X cursors instead If you use the X cursors make sure you center the signal in the Y axis 1 41 07 YII 126 2m Operating Your Oscilloscope To use the XY display mode 6 Move the Y1 and Y2 cursors to the center of the signal Again note the AY value Figure 2 29 1 41 07 2 40 560 a Es toe a e a YiC2a 58 75m Yec2 53 lem AYCI 111 9m 7 Calculate the phase difference using formula below second AY 111 9 first AY 244 4 sin 0 27 25 degrees of phase shift 2 42 Operating Your Oscilloscope To use the XY display mode Figure 2 30 41 09 24o YR Signals are 90 out of phase Figure 2 31 141 09 2 40 50 xy RUN Signals are in phase Operating Your Oscilloscope To use the XY display mode XY display mode operating hint When you select the XY display mode the time base is turned off Channel 1 is the X axis input channel 2 is the Y axis input and the external trigger in the HP 54610 is the Z axis input If you only want to see portions of the Y versus X display use the Z axis input Z axis turns on and off the trace analog oscilloscopes called this Z blanking because it turned the beam on and off
72. s Line voltage range 100 Vac to 250 Vac Line voltage selection Automatic Line frequency 45 Hz to 440 Hz Maximum power consumption 220 VA 4 8 Performance Characteristics General General Environmental characteristics The instrument meets or exceeds the environmental requirements of MIL T 28800D for Type III Class 3 Style D equipment as described below Ambient temperature Tested to MIL T 28800D paragraphs 4 5 5 13 option 2 and 4 5 5 14 Operating 10 C to 55 C 14 F to 131 F Nonoperating 51 C to 71 C 60 F to 160 F Humidity tested to Hewlett Packard environmental specification section 758 paragraphs 4 0 4 1 and 4 2 for class B 1 products Operating 95 relative humidity at 40 C 104 F for 24 hours Nonoperating 90 relative humidity at 65 C 149 F for 24 hours Altitude Tested to MIL T 28800E paragraph 4 5 5 2 Operating to 4 500 m 15 000 ft Nonoperating to 15 000 m 50 000 ft EMI EMI commercial FTZ class B EMI Meets the requirements in accordance with MIL T 28800D CEO1 Part 2 narrow band requirements up to 15 kHz CEO03 Part 4 CSO1 Part 2 CS02 Part 2 CS06 Part 5 limited to 300 V REO1 Parts 5 and 6 measured at 12 inches 15 dB relaxation to 20 kHz and exceptioned from 20kHz to 50 kHz REO2 Part 2 limited to 1 GHz Full limits of class A1C and A1F with option 002 installed without option 002 installed 10 dB relaxation 14 kHz to 1 GHz
73. s either positive or negative sync pulses Field 1 Triggers on the field 1 portion of the video signal Field 2 Triggers on the field 2 portion of the video signal Line Triggers on all the TV line sync pulses HF Rej Controls a 500 kHz low pass filter in the trigger path 5 Set the time base to 200 us div then center the signal on the display with the delay knob delay about 800 us 6 Press Main Delayed then press the Delayed softkey 7 Set the delayed sweep to 20 us div then set the expanded portion over the VITS delay about 988 8 us Figure 2 24 Frame 2 window ed on the VITS in Line 18 Figure 2 25 Operating Your Oscilloscope To analyze video waveforms Press Main Delayed then press the Main softkey Use the horizontal vernier to change the time base to 7 us div then center the signal on the display with the delay knob delay about 989 us prao 7 002 Pk TVF2 1 RUN 1 5007 Full screen display of the IRE 2 36 Operating Your Oscilloscope To analyze video waveforms Delay in TV line units hint The HP 54610 oscilloscope has the ability to display delay in TV line units Using the TV field trigger mode activates this line counting feature When Field 1 or Field 2 is selected as the trigger source delay can be setin terms of time or line number Both fields triggering in the HP 54610 hint The HP 54610 can trigger on t
74. se because of its familiar controls and real time display You can discard your viewing hood as this oscilloscope has none of the viewing problems that are associated with analog oscilloscopes A bright crisp display is obtained at all sweep speeds and delayed sweep magnifications Storage is as simple as pressing a button View events ahead of the trigger using negative time Cursors and automatic measurements greatly simplify your analysis tasks You can upgrade this oscilloscope for hardcopy or remote control with the addition of an interface module Built in pass fail testing can be added with the addition of one of the Test Automation modules Unattended waveform monitoring and additional waveform math such as FFT can be added with the addition of one of the Measurement Storage modules Bring your scope and PC together with either BenchLink or ScopeLink software Both BenchLink which runs under Windows and ScopeLink which runs under DOS allow the easy transfer of scope traces and waveform data to your PC for incorporation into documents or storage ii Accessories supplied Two 1 5 meter 10 1 Rugged 500 MHz Probes HP 10073A Power cord for country of destination This User and Service Guide Accessories available HP 34810A BenchLink Software HP 54650A HP IB Interface Module HP 54651A RS 232 Interface Module HP 54652A Parallel Interface Module HP 54653A ScopeLink Software HP 54654A Operator s Training Kit HP 5465
75. sed or implied Hewlett Packard specifically disclaims the implied warranties or merchantability and fitness for a particular purpose Exclusive Remedies The remedies provided herein are the buyer s sole and exclusive remedies Hewlett Packard shall not be liable for any direct indirect special incidental or consequential damages whether based on contract tort or any other legal theory Assistance Product maintenance agreements and other customer assistance agreements are available for Hewlett Packard products For any assistance contact your nearest Hewlett Packard Sales Office Certification Hewlett Packard Company certifies that this product met its published specifications at the time of shipment from the factory Hewlett Packard further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology to the extent allowed by the Institute s calibration facility and to the calibration facilities of other International Standards Organization members About this edition This is the first edition of the HP 54610 Oscilloscope User The following list of pages gives the date of the current edition and of any changed and Service Guide pages to that edition Publication number All pages original edition 54610 97009 Printed in USA Edition dates are as follows First edition March 1994 New editions are complete revisio
76. signal Examples of custom measurements include rise time measurements from reference levels other than 10 90 frequency and width measurements from levels other than 50 channel to channel delay measurements and voltage measurements See figures 2 11 through 2 16 for examples of custom measurements Connect a signal to the oscilloscope and obtain a stable display Press cursors A softkey menu appears with six softkey choices Four of the softkeys are cursor functions Source Selects a channel for the voltage cursor measurements Active Cursor There are four cursor choices V1 and V2 are voltage cursors while t1 and t2 are time cursors Use the knob below the Cursors key to move the cursors When you press the V1 and v2 softkeys simultaneously or the t1 and t2 softkeys simultaneously the cursors move together Clear Cursors Erases the cursor readings and removes the cursors from the display 2 23 Figure 2 11 Figure 2 12 Operating Your Oscilloscope To make cursor measurements 0 005 10 087 ti G 200ns t2 62 60ns At 53 40ns Cursors used to measure pulse width at levels other then the 50 points 0 005 50 087 ti 14 00us t2 59 00us t 46 00us 1 At 22 22kKHe Cursors used to measure the frequency of the ringing on a pulse 2 24 Figure 2 13 Figure 2 14 Operating Your Oscilloscope To make cursor measurements 1 00 2 5009 0 008 20 0R
77. solate an edge fora rise time measurement Figure 2 7 42 00 0B ooa _ Risec1ij 4 625ns Delayed sweep isolates a leading edge for a rise time measurement Operating Your Oscilloscope To make voltage measurements automatically To make voltage measurements automatically You can measure the following voltage parameters automatically with the oscilloscope peak to peak average rms maximum minimum top and base The following exercise guides you through the Voltage keys by making an rms voltage measurement Figures 2 8 and 2 9 show pulses with some of the voltage measurement points Figure 2 8 amas VTOP Vp p VMIN Y 54600W2 1 Pulse w here the top and bottom are w ell defined VTOP VMAX Figure 2 9 VBASE VMIN 54600W22 Pulse w here the top and bottom are not well defined Operating Your Oscilloscope To make voltage measurements automatically Connect a signal to the oscilloscope and obtain a stable display Press Volt age A softkey menu appears with six softkey choices Three of the softkeys are voltage measurement functions Source Selects a channel for the voltage measurement Voltage Measurements Three voltage measurement choices are available Vp p Vavg and Vrms The measurements are determined by voltage histograms of the signal Clear Meas clear measurement Erases any measurement results from the display and removes the horizontal
78. splay then press the Average softkey e Toggle the Average softkey to select 8 averages 3 Set the signal generator for 1 MHz at about 5 6 dBm Notice that the signal on the display is about 5 cycles and six divisions of amplitude Service Verifying Oscilloscope Performance Press Voltage then press the Vp p softkey Wait a few seconds for the measurement to settle averaging is complete then note the Vp p reading from the bottom of the display Vp p mV Set the calibration factor percent of the power meter to the 1 MHz value from the calibration chart on the probe then press dB REF on the power meter to set a 0 dB reference Change the frequency of the signal generator to 500 MHz Set the calibration factor of the power meter to 500 MHz percent value from the chart on the probe Adjust the amplitude of the signal generator for a power reading as close as possible to 0 0 dB REL Power meter reading dB 3 12 Service Verifying Oscilloscope Performance 8 Change the time base to 5 ns div Wait a few seconds for the measurement to settle averaging is complete then note the Vp p reading from the bottom of the display Vp p mV 9 Calculate the response using the following formula step 8 result step 4 result 10 Correct the result from step 9 with any difference in the power meter reading from step 7 Make sure you observe all number signs For example Result from step 9 2 3 dB Po
79. surements on the first displayed event Figure 2 5 shows how to use delayed sweep to isolate an event for a frequency measurement If the measurement is not possible in the delayed time base mode then the main time base is used If the waveform is clipped it may not be possible to make the measurement Sqeo 0 10087 i As Freqe 13 6 Delayed time base isolates an event for a frequency measurement 2 15 Figure 2 6 Operating Your Oscilloscope To make time measurements automatically To make time measurements automatically You can measure the following time parameters with the oscilloscope frequency period duty cycle width rise time and fall time The following exercise guides you through the Time keys by making a rise time measurement Figure 2 6 shows a pulse with some of the time measurement points Connect a signal to the oscilloscope and obtain a stable display When the signal has a well defined top and bottom the rise time and fall time measurements are made at the 10 and 90 levels If the oscilloscope cannot find a well defined top or bottom the maximum and minimum levels are used to calculate the 10 and 90 points These levels are shown on page 2 19 in figures 2 8 and 2 9 RISETIME FALLT IME l l l l l 90 50 10 H WIDTH P lt WIDTH a 54600W20 2 16 Operating Your Oscilloscope To make time measurements automatically 2
80. synchronous noise ona signal Press Autostore Notice that STORE is displayed in the status line Set the Trigger Mode to Normal then adjust the trigger level into the noise region of the signal Decrease the sweep speed for better resolution of the asynchronous noise e To characterize the asynchronous noise signal use the cursors 1 50 09 0 00s 20 one This is a triggered view of the asynchronous noise show n in figure 2 18 2 30 Figure 2 20 1 Connect a signal to the oscilloscope and obtain a stable display 2 Remove the noise from the trigger path by turning on either high Operating Your Oscilloscope To reduce the random noise on a signal To reduce the random noise on a signal If the signal you are applying to the oscilloscope is noisy figure 2 22 you can set up the oscilloscope to reduce the noise on the waveform figure 2 23 First you stabilize the displayed waveform by removing the noise from the trigger path Second you reduce the noise on the displayed waveform frequency reject or noise reject High frequency reject HF Reject adds a low pass filter with the 3 dB point at 50 kHz see figure 2 20 You use HF reject to remove high 3 dB down point 54600W02 50 kHz frequency noise such as AM or FM broadcast stations from the trigger path HF reject Figure 2 21 0 dB Operating Your Oscilloscope To reduce the random noise on a signal Low fre
81. t accuracy on page 3 7 4 3 Performance Characteristics Horizontal System Horizontal System Sweep speeds 5 s div to 1 ns div main and delayed Accuracy 0 01 of reading Vernier Both main and delayed sweep Accuracy 0 05 of reading Horizontal resolution 25 ps Cursor accuracy At and 1 At 0 01 0 2 of full scale 200 ps Delay jitter 10 ppm Pretrigger delay negative time 210 divisions Posttrigger delay from trigger point to start of sweep The greater of 2560 divisions or 50 ms but not to exceed 100 s Delayed sweep operation From 2 times up to 200 times main sweep Delayed sweep can be as fast as 1 ns div but must be at least 2 times main sweep Horizontal modes Main Delayed Alt X Y and Roll l Tested see To verify horizontal At and 1 At accuracy on page 3 14 4 4 Performance Characteristics Trigger System Trigger System Sources Channels 1 2 line and external Internal trigger Sensitivity dc to 25 MHz 0 35 div or 3 5 mV dc to 500 MHz 1 div or 10 mV Coupling ac dc LF reject HF reject and noise reject LF reject attenuates signals below 50 kHz and HF reject attenuates signals above 50 kHz Modes Auto Autolevel Normal Single and TV TV triggering Available on channels 1 and 2 TV line and field 0 5 division of composite sync for stable display Holdoff Adjustable from 200 ns to 13 s External trigger Range 18 V Sensitivity dc to 25 MHz 50mV dc to
82. t at the bottom of the display Press cursors then press the V1 softkey Using the cursors knob set the V1 cursor on the baseline If you are in an electrically noisy environment it can help to place a shorting cap on the input BNC connector when positioning V1 Connect the power supply to the oscilloscope and to the multimeter using the BNC tee and cables Set the power supply output to the first line in table 3 4 3 8 Table 3 4 Service Verifying Oscilloscope Performance 6 Press the V2 softkey then position the V2 cursor to the baseline The AV value at the bottom of the display should be within the test limits of table 3 4 If a result is not within the test limits see Troubleshooting the Oscilloscope on page 30 7 Continue checking the voltage measurement accuracy with the remaining lines in table 3 4 Equipment Required Volts Div setting 5V Div 2 V Div 1 V Div 0 5 V Div 0 2 V Div 0 1 V Div 50 mV Div 20 mV Div 10 mV Div 5 mV Div 2 mV Div Pow er supply setting 35V 14V 1V 3 5 V 14V 700 mV 350 mV 140 mV 70 mV 35 mV 14mV Test limits 34 14V 13 656 V 6 828 V 3 414V 1 3656 V 682 8 mV 341 4 mV 136 56 mV 68 28 mV 33 98 mV 13 4 mV to to to to to to to to to to to 35 86 V 14 344 V 7 172 V 3 586 V 1 4344 V 717 2 mV 358 6 mV 143 44 mV 71 72 mV 36 02 mV 14 6 mV 8 Disconnect the power supply from the oscilloscope then repeat steps 1 to 7 fo
83. tensity control on the front panel to mid range Adjust Sub Bri sub bright to the lowest setting so that the half bright blocks on the display are visible Increase the intensity control to a comfortable viewing level This is usually about 3 4 of its maximum range 3 28 10 11 12 Figure 3 3 Service Adjusting the Oscilloscope Adjust HB Cont half bright contrast for the best contrast between the half bright and full bright blocks You can readjust Sub Bri intensity control and HB Cont to suit your individual preference Press any key to continue to the next test pattern Then adjust H Hold horizontal hold to center the display horizontally Adjust Focus for the best focus Press any key to continue to the normal display pattern Then adjust V Lin vertical linearity for equal sizing of all four corner squares Adjust V Size vertical size to center the display vertically at the maximum allowable size without losing the text Adjustments V Lin and V Size interact so you may need to readjust sizing and vertical centering of the display FOCUS SUB BRI H HOLD HB CONT B ADJ 54600E32 WARNING CAUTION Table 3 12 Troubleshooting the Oscilloscope The service policy for this instrument is replacement of defective assemblies The following procedures can help isolate problems to the defective assembly The maintenance described in this section is performed
84. the oscilloscope Contents In This Book v The Oscilloscope at a Glance To connect a signal to the oscilloscope 1 3 To display a signal automatically 1 5 To set up the vertical window 1 6 To set up the time base 1 8 To trigger the oscilloscope 1 10 To use roll mode 1 13 Operating Your Oscilloscope To use delayed sweep 2 3 To use storage oscilloscope operation 2 6 To capture a single event 2 8 To capture glitches or narrow pulses 2 10 To trigger on a complex waveform 2 12 To make frequency measurements automatically 2 14 To make time measurements automatically 2 16 To make voltage measurements automatically 2 19 To make cursor measurements 2 23 To remove cabling errors from time interval measurements 2 27 To make setup and hold time measurements 2 28 To view asynchronous noise on a signal 2 29 To reduce the random noise on a signal 2 31 To analyze video waveforms 2 34 To save or recall traces 2 38 To save or recall front panel setups 2 39 To use the XY display mode 2 40 Service To return the oscilloscope to Hewlett Packard 3 4 Verifying Oscilloscope Performance 3 5 To check the output of the DC CALIBRATOR 3 6 To verify voltage measurement accuracy 3 7 Contents 1 gt Po Contents To verify bandwidth 3 10 To verify horizontal At and 1 At accuracy 3 14 To verify trigger sensitivity 3 17 Adjusting the Oscilloscope 3 21 To adjust the power supply 3 22 To perform the self calibration
85. the changes in the status line e To display the delay time of the delayed sweep either press Main Delayed or turn the delay knob The delay value is displayed near the bottom of the display 4 Set the time reference Time Ref to either left Lft or center Cntr Figure 2 1 shows the time reference set to left The operation is like the delayed sweep of an analog oscilloscope where the delay time defines the start of the delayed sweep 2009 Delayed sweep markers Time reference set to left Figure 2 2 Operating Your Oscilloscope To use delayed sweep Figure 2 2 shows the time reference set to center Notice that the markers expand around the area of interest You can place the markers over the area of interest with the delay knob then expand the delayed sweep with the time base knob to increase the resolution 2008 Bito 50097 Delayed sweep markers Time reference setto center Operating Your Oscilloscope To use storage oscilloscope operation To use storage oscilloscope operation There are four front panel storage keys They are white instant action keys that change the operating mode of the oscilloscope The following steps demonstrate how to use these storage keys Connect a signal to the oscilloscope and obtain a stable display 2 Press Autostore Notice that STORE replaces RUN in the status line For easy viewing the stored wavef
86. 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 1 20 09 fo 00s 2008y 1 RUN T mee On this waveform 256 averages were used to reduce the noise 2 33 Operating Your Oscilloscope To analyze video waveforms To analyze video waveforms The TV sync separator in the oscilloscope has an internal clamp circuit This removes the need for external clamping when you are viewing unclamped video signals TV triggering requires two vertical divisions of display either channel 1 or channel 2 as the trigger source and the selection of internal trigger Turning the trigger level knob in TV trigger does not change the trigger level because the trigger level is automatically set to the sync pulse tips For this exercise connect the oscilloscope to the video output terminals on a television Then set up the oscilloscope to trigger on the start of Frame 2 Use the delayed sweep to window in on the vertical interval test signals VITS which are in Line 18 for most video standards NTSC PAL SECAM 1 Connect a TV signal to channel 1 then press Autoscale 2 Press Display then press the Peak Det softkey 3 Press Mode then press the TV softkey 4 Press Slope Coupling then press the Field 2 softkey 2 34 Operating Your Oscilloscope To analyze video waveforms Polarity Select
87. to remove this offset error from your measurement This process is also referred to as deskewing Select Time Reference to Center with the Graticule turned on Connect the channels to be nulled to a common test point and obtain a stable display A fast edge is a good choice Press print utility then select the Self Cal menu This gives you access to the calibration and skew adjustments Select Skew 1 gt 2 to adjust channel 2 with respect to channel 1 Rotate the knob to bring the channels into time alignment This nullifies the cable delay Select Skew 1 gt Eto adjust the External Trigger with respect to Channel 1 Rotate the knob to bring these channels into time alignment Note This adjustment is not affected by pressing Autoscale Only the default setup will return the skew values to zero seconds Figure 2 17 Operating Your Oscilloscope To make setup and hold time measurements To make setup and hold time measurements One method of testing a device for its setup and hold times limits uses a variable pulse generator to provide the time varying pulses and an oscilloscope to monitor when the setup and hold times are violated Selecting the trigger for this measurement is important The clock is not a good choice for a trigger because it is not unique Triggering on the Q output results in loss of trigger when the setup and hold time is violated Triggering on the D input is the best choice In this exam
88. trigger 1 5000 0 00s 5 008 i STOP Saal Holdoff synchronizes the waveform with the trigger Operating Your Oscilloscope To make frequency measurements automatically To make frequency measurements automatically The automatic measurement capability of the oscilloscope makes frequency measurements easy as the following steps demonstrate Connect a signal to the oscilloscope and obtain a stable display Press Time A softkey menu appears with six softkey choices Toggle the Source softkey to select a channel for the frequency measurement Press the Freq softkey The oscilloscope automatically measures the frequency and displays the result on the lower line of the display The number in parentheses after the word Freq is the number of the channel that the oscilloscope used for the measurement The oscilloscope retains in memory and displays the three most current measurement results If you make a fourth measurement the left most result is dropped 2 14 Figure 2 5 Operating Your Oscilloscope To make frequency measurements automatically Ifthe Show Meas softkey is turned on cursors are displayed on the waveform that show the measurement points for the right most measurement result If you select more than one measurement you can show a previous measurement by reselecting the measurement e To find the Show Meas softkey press the Next Menu softkey The oscilloscope makes automatic mea
89. use the following procedure to trigger on a periodic complex waveform Connect a signal to the oscilloscope 2 Set the trigger level to the middle of the waveform Adjust the Holdoff knob to synchronize the trigger of the oscilloscope with the complex waveform By setting the Holdoff to synchronize the trigger the oscilloscope ignores the trigger that results in figure 2 3 and waits for the trigger that results in figure 2 4 Also notice in figure 2 3 that the trigger is stable but the waveform is not synchronized with the trigger TE Holdoff operating hints 1 The advantage of digital holdoff is that it is a fixed number As a result changing the time base settings does not affect the holdoff number so the oscilloscope remains triggered In contrast the holdoff in analog oscilloscopes is a function of the time base setting making it necessary to readjust the holdoff each time you change the time base setting 2 The rate of change of the holdoff adjustment knob depends on the time base setting you have selected If you need a lengthy holdoff setting increase the time div setting on the time base then make your coarse holdoff adjustment Now switch back to the original time div setting and make the fine adjustment to reach the exact amount you want Figure 2 3 Figure 2 4 Operating Your Oscilloscope To trigger on a complex waveform Stable trigger but the waveform is not synchronized with the
90. veral setups are repeated many times Press Setup To change the selected memory location press either the left most softkey or turn the knob closest to the Cursors key Press the Save softkey to save a front panel setup then press the Recall softkey to recall a front panel setup Figure 2 26 Operating Your Oscilloscope To use the XY display mode To use the XY display mode The XY display mode converts the oscilloscope from a volts versus time display to a volts versus volts display You can use various transducers so the display could show strain versus displacement flow versus pressure volts versus current or voltage versus frequency This exercise shows a common use of the XY display mode by measuring the phase shift between two signals of the same frequency with the Lissajous method Connect a signal to channel 1 and a signal of the same frequency but out of phase to channel 2 Press Autoscale press Main Delayed then press the xy softkey Center the signal on the display with the Position knobs and use the Volts Div knobs and the vertical Vernier softkeys to expand the signal for convenient viewing C anon gee BO D SIGNAL MUST BE CENTERED gt IN xX 54600401 2 40 Figure 2 27 Figure 2 28 Operating Your Oscilloscope To use the XY display mode 1 41 07 2 40 560 x RUN 4 Press cursors 5 Set the Y2 cu
91. wer meter reading from step 7 0 2 dB REL True response 2 3 0 2 2 1 dB The true response should be lt 3 dB If the result is not lt 3 dB see Troubleshooting the Oscilloscope on page 3 30 11 Repeat steps 1 to 10 for channel 2 20 logio Table 3 6 Service Verifying Oscilloscope Performance To verify horizontal At and 1 At accuracy In this test you verify the horizontal At and 1 At accuracy by measuring the output of a time mark generator with the oscilloscope Test limits 0 01 0 2 of full scale 100 ps same channel Equipment Required Equipment Critical specifications Recommended M odel Part Time marker generator Stability 5 ppm after 1 2 hour TG 501A and TM 503B Cable BNC 3 feet HP 10503A Connect the time mark generator to channel 1 Then set the time mark generator for 0 1 ms markers Setup the oscilloscope a Press Setup then press the Default Setup softkey b Press Autoscale c Set the time base to 20 us div d Adjust the trigger level to obtain a stable display 3 14 Service Verifying Oscilloscope Performance Press Time then press the Freq and Period softkeys You should measure the following Frequency 10 kHz test limits are 9 899 kHz to 10 10 kHz Period 100 us test limits are 98 98 us to 101 01 us If the measurements are not within the test limits see Troubleshooting the Oscilloscope on page 3 30 Change the time
92. with power supplied to the oscilloscope and with the protective covers removed Only trained service personnel who are aware of the hazards involved should perform the maintenance Whenever possible perform the procedures with the power cord removed from the oscilloscope Read the safety summary at the back of this book before proceeding Do not disconnect any cables or remove any assemblies with the power applied to the oscilloscope or damage to the oscilloscope can occur The following equipment is needed for troubleshooting the oscilloscope Equipment Required Equipment Critical specifications Recommended model part Digital multimeter Accuracy 0 05 1 mV resolution HP 34401A Oscilloscope 100 M Hz HP 54600A Dummy load Compatible with power supply HP 54600 66504 l See page 3 31 to construct your own dummy load 3 30 Service Troubleshooting the Oscilloscope To construct your own dummy load Obtain a connector compatible with the connector on the LVPS Connect the following load resistors to the connector 5 1 V requires a 3 A load 1 7 Q and 15 W on pin 15 17 or 19 15 75 V requires a 1 3 A load 12 2 Q and 20 5 W on pin 11 or 13 With the fan operating 15 75 V requires a 0 6 A load 26 25 Q and 9 5 W on pin 5 or 7 Without the fan operating 15 75 V requires a 0 8 A load 26 25 Q and 13 W on pin 5 or 7 Connect the other end of the resistors to ground pins 2 4 6 and 8 wo Service
93. work on a rising edge The following steps show you how to use the oscilloscope to capture a single event Connect a signal to the oscilloscope 2 Set up the trigger e Press Source Select a trigger source with the softkeys e Press Slope Coupling Select a trigger slope with the softkeys e Turn the Level knob to a point where you think the trigger should work Press Mode then press the Single softkey Press Erase to clear previous measurements from the display Press Run Pressing the Run key arms the trigger circuit 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 key again rearms the trigger circuit and erases the display 2 8 Operating Your Oscilloscope To capture a single event 6 If you need to compare several single shot events press Autostore Like the Run key the Autostore key also arms the trigger circuit When the trigger conditions are met the oscilloscope triggers Pressing the Autostore key again rearms the trigger circuit without erasing the display All the data points are retained on the display in half bright with each trigger allowing you to easily compare a series of single shot events After you have acquired a single shot event pressing a front panel key softkey or changing a knob can erase the event from the display If you press the Stop key

Download Pdf Manuals

Related Search

Related Contents

le plan detaille du dictionnaire  EVBUM2197 - STK404-000N Series Evaluation Board User's Manual  Hama 32GB USB2.0  Guide de l`opérateur 2011 pour les spas  Mode d`emploi  PDFファイル      SST SST89F54, SST89F58 User Manual  Smeg DF6FABO dishwasher  

Copyright © All rights reserved. Failed to retrieve file