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HP 8990A User's Manual

1. Edge Definition Algorithms pulse that has slight overshoot It would be wrong to select the highest point of the waveform as the top since the waveform normally rests below the perturbation Top Base performs a histogram on the waveform and finds the most prevalent point above and below the waveform midpoint The most prevalent point is one that represents greater than approximately 5 of the total display points 501 and is considered to be either the top or base If no point accounts for more than 5 of the total then the top is chosen as the absolute maximum and the base is chosen as the absolute minimum If the top or base arrived at in the measurement is different from what is expected the measurement results may also be different than expected If there is doubt turn continuous measurements off in the Define Measure Menu and repeat the measurement to observe where the markers are placed on the waveform Both rising and falling edges are defined as transitional edges that must cross three thresholds A rising edge must cross the lower threshold in a positive direction defining it as a rising edge cross the mid threshold any number of crossings both positive and negative are permissible and then cross the upper threshold without any crossing of the lower threshold A falling edge must cross the upper threshold in a negative direction cross the mid threshold any number of times
2. 3 75 3 76 3 76 3 77 3 77 3 78 3 78 3 80 3 80 Contents 5 3 Markers Menu Introduction to Markers 1 3 83 E ampl markers sa 4 ea ee be a A PGP KOR ee dco os ae tees po Say oe ss ee 3 85 marker l h83 6 ee lh S woe Y 3 85 time markers 0 4 3 86 start marker 684 3 86 stop marker 4 4 3 86 ampi time mkrs Sai 3 87 3 Carrier Frequency Menu Introduction to the Carrier Frequency 3 89 Channel Selector Key 2 98 90 Channels land 4 coupled 3 90 Channels 1 and 4 separate 1 3 90 3 Waveform Math Menu Introduction to the Functions 3 91 Single Sensor Input Option 393 Defining a Function 2 3 93 Function Key 2 2 4 3 93 display Key 2 ce 3 93 chan mem Key 4 3 94 Operator Key te eae a 3 94 chan men Key 2 2 3 95 sensitivity Key 0 3 95 offset Key 0g eg gr as wok GS eee ye 8 95 Vertical Scaling Units 2 2 395 Displaying Functions 96 Waveform Math Exercise 2 98 Analyzer Setup 0 see 3 98 Contents 6 Waveform Memory Menu Introduction to the Memories waveform pixel Key waveform Menu nonvolatile Key display Key source Key 2 2 store Key pixel Menu volatile Key display Key clear memory Key add to memory Key Waveform Memory Exercise Analyzer Setup D
3. and trigger level until the Analyzer displays a stable 1 uW signal full scale The scale should be in the vicinity of 200 nW 4 37 Performance Tests 4 38 HP 8990A Lower the trigger level down to two divisions above the baseline With a 30 dBm 1 pW or greater signal the Analyzer should be able to trigger down to 2 divisions and achieve a stable display Repeat the verification procedure for channel 4 If any of the measurements fail refer to the troubleshooting section in the Peak Power Analyzer Service Manual If necessary you may record measurement results in the Performance Test Record at the end of this chapter HP 8990A Performance Tests Checking Channel 2 and 3 Trigger Sensitivity Specification Description Electrical Performance Characteristics Limits 0 2 V pp en de 1 MHz Trigger Sensitivity 0 5 V pp 1 MHz 100 MHz The channel 2 and 3 trigger sensitivity test verifies that the Peak Power Analyzer can trigger on a signal equal to the specified sensitivity To verify external trigger sensitivity the minimum triggerable signal as displayed on the Peak Power Analyzer is input to channel 2 or 3 The trigger level is then adjusted until a stable display is achieved PEAK SIGNAL GENERATOR Figure 4 10 Checking Channel 2 and Channel 3 Trigger Sensitivity Equipment Setup 4 39 Performance Tests 4 40 Equipment Procedure H
4. 2 Trig d auto Key source Key 1 eee ee level Key 2 2 ee ee slope Key 204 Se G Ke hk OR es holdoff Key 040 4 Holdoff Exercise 2 aa Pulse Generator Setup 2 Peak Power Analyzer Setup ro e e e s 3 29 3 30 3 31 oe 3 33 3 35 3 35 3 35 3 36 3 36 3 37 3 37 3 38 3 38 3 39 3 39 3 39 3 39 3 39 3 40 3 40 3 40 3 41 3 41 3 42 3 43 3 43 3 44 3 45 3 45 3 45 3 46 3 46 3 46 Pattern Trigger Mode pattern Key when Key holdoff Key Pattern Trigger Exercise Pulse Generator Setup Peak Power Analyzer Setup State Trigger Mode clock Key when Key x a present Key ead holdoff Key oP State Trigger Exercise Pulse Generator Setup Peak Power Analyzer Setup Delay Trigger Mode qualify on Key edge Qualify Option pattern Qualify Option state Qualify Option delay Key 0 trigger on Key Delay Trigger Exercise Pulse Generator Setup Peak Power Analyzer Setup Display Menu Introduction to the Display Display Mode Key MOTI a 1 7 we ee a avg etch Ce rh eA a VE ag i SHY se tae Bi ae ot oes ee 8 power display Key no of screens Key off frame axis grid Key connect dots Key aaa 3 50 3 51 3 51 3 52 3 53 3 53 3 54 3 58 3 59 3 59 3 60 3 60 3 60 3 61 3 61 3 64 3 65 3 66 3 66 3 66 3 67 3 68 3 68 3 68 3 69
5. Operating Manual HP 8990A Peak Power Analyzer SERIAL NUMBERS Attached to the rear panel of the instrument is a serial number plate The serial number is in the form 0000A00000 the first four digits and the letter are the serial number prefix The last five digits are the suffix The prefix is the same for identical instruments it changes only when a configuration change is made to the instrument The suffix however is assigned sequentially and is different for each instrument This manual applies to instruments with serial numbers prefixed 3107A and above C HEWLETT LE PACKARD Printed in USA HP part number 08990 90032 Supersedes December 1992 Printed in USA April 1997 Notice 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 of 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 Copyright Hewlett Packard Company 1991 1992 1997 All Rights Reserved Reproduction adaptation or translation without prior written permission is prohibited except as allowed under the copyright laws 1400 Fountaingrove Parkway Santa Rosa CA 95403 1799 USA HP 8990A Peak Power An
6. Press display until on is highlighted For the first operand press the third key and select mi In the next area select For the other operand press the fifth key and select chan 1 Now you can see the function of subtracting channel 1 from waveform memory 1 m1 The vertical sensitivity of the function is shown by the sensitivity softkey The amplitude of waveform memory 1 is 10 mW and the amplitude of channel 1 is 3 dB down from 10 mW The function shows the difference of waveform memory 1 minus channel 1 Ap running KAVYEFORH NATH Tt 2 a display off ae ee e Ca ae Pee se ee ee a a eg ree ee E i las Se aaa aa wa So a Ye me le Fa a Ed 5 E A sar OF aa EERE arataa ERE E F T T F ee ee ENEN CERNINEN ENE EA t 9 09000 1 00000 ms 200 us div ELERE EN iE does T A AEE E K P3 1 60000 ts offset 13 2500 ty thee ses Figure 3 40 Waveform Memory 1 minus Channel 1 3 99 3 100 This Page intentionally Left Blank Waveform Memory Menu Introduction to the This chapter describes how to select the waveform and Memories pixel memories on the Peak Power Analyzer The menu consists of two submenus u waveform memories ml m4 used to store one waveform at a time u pixel memories pl and p2 used as a screen store In this manner the memories are used as a storage oscilloscope Waveform MEMORY Twin rm nonvoelatife volatile mi m2 m3 m4 pi p2 display dis
7. Three miscellaneous tests are available u HP IB a keyboard E crt The loop test is a function designed for use by qualified service personnel It is unnecessary to use this function for normal Analyzer operation When a self test loop has been initiated it runs until stopped by pressing and holding any key Pressing this key begins the selected test Pressing this key causes all the self tests to be run Pressing this key returns to the Utility menu HP 8990A Utility Menu Order of Calibrations Calibrating to meet Specified Accuracy The Peak Power Analyzer has been Serviced There are four situations that require the Peak Power Analyzer to be calibrated Each situation requires that the calibration procedure be performed in a specific order The situations are listed below m The Peak Power Analyzer needs calibrating to meet its specified accuracy m The Peak Power Analyzer has been serviced m A probe cal is required m A time null is required At certain times the Peak Power Analyzer may require calibrating to meet it s specified accuracy The conditions that require calibrating are listed in the instr cal menu section of this chapter The calibrations must be performed in the order listed u Vertical Cal m Delay Cal The Vertical Cal and Delay Cal procedures are described in the instr cal menu section of this chapter If the Peak Power Analyzer has been serviced for example the R
8. aries Lantara setutan teh tu Algorithms EL AL ETA TE TT E TET a EEEE E E PAGS ET A EAP AN ST BENT BORG Introduction One of the Peak Power Analyzer s primary features is its ability to make automatic measurements on displayed waveforms This appendix provides details on how automatic measurements are calculated and offers some tips on how to improve results Measurement Setup Measurements typically should be made at the fastest possible sweep speed for the most accurate measurement results The entire portion of the waveform that is to be measured must be displayed on the Analyzer That is m at least one complete cycle must be displayed for PRI Pulse Repetition Interval or PRF Pulse Repetition Frequency measurements m the rising edge followed by the negative edge must be displayed for pulse width measurements a the falling edge followed by the rising edge must be displayed for offtime measurements z the leading edge of the waveform and enough of the pulse to define the top and base must be displayed for risetime measurements and all other edge measurements m the trailing edge of the waveform must be displayed for falltime measurements and all other edge measurements Aigorithms HP 8990A m the top base and peak of the waveform must be displayed for overshoot measurements Making Measurements If more than one waveform edge or pulse is displayed the measurements are made
9. w If possible turn the RF source off Otherwise disconnect the peak power sensor from the RF source m Press the key The zeroing takes less than one minute mw The advisory Zeroing sensor offset is displayed during the zeroing process m The advisory Sensor zero completed indicates when zeroing is complete The procedure needs to be repeated when accuracy is a concern for signals less than 10 watts and the peak power sensor has been disconnected from the Peak Power Analyzer since the last zeroing Channels 2 and 3 3 38 Vertical Sensitivity Key The vertical sensitivity key is the third key from the top in the channel menu The field itself is not labeled However the current volts division is displayed with the units of the current selection When this function is selected either of the entry devices can be used for data entry The vertical sensitivity range is from 100 mV division to 500 mV division When the knob is used vertical sensitivity changes in a 1 2 5 sequence The FINE key can be used with this function The probe setting will affect the vertical sensitivity units HP 8990A offset Key coupling Key more preset probe Key Channel more Key probe Key Channel Menu When offset is selected 0 volts is on the vertical midpoint of the display Offset is the voltage level at mid screen Offset moves the displayed signal up or down similar to the vertical position a
10. 10 0 na div holdoff tine Stetemierers ne Figure 3 23 XTLX State Channei 2 is displayed in the top screen To satisfy the conditions of the bit pattern channel 3 must be low lower than the channel 3 trigger level or less than 100mV When the signal on channel 2 goes higher than 125 mV and channel 3 is still low less than 100 mV the pattern conditions have been satisfied and the Peak Power Analyzer triggers on the next positive pulse on channel 2 m Press the present key and change the condition to is not The pattern becomes false when channel 3 turns high u Change the bit pattern to X HX and select the is present condition 3 63 Trigger Menu fp running HP 8990A STATE TRIGGER dar rarvesranaien inate rtAiet Ahhevarhddeereetenen 50 000 ns edge pattern delay nt clock i i B3 4 eeen pri when Re Sk x dss chaise e aijon pated npr ferdius c fence ad eps ha wa is not present 0 00009 s 50 000 ns 10 0 ns diy holdoff Figure 3 24 X HX State To satisfy this bit condition the clock channel must go low while channel 3 is high The Peak Power Analyzer does not trigger until channel 2 goes low while channel 3 is high As rrr Qe ET A A ts Delay Trigger Mode 3 64 Delay Trigger mode qualifies on a signal edge pattern or state delay for a period of time or occurrence of edges and then triggers on a selected edge from an
11. 4 24 HP 8990A Note Procedure Performance Tests Prior to performing this test the performance tests which verify proper operation of channel 1 on the Peak Power Analyzer and operation of the peak power sensor should be complete These tests include Checking Power Measurement Range Checking Instrumentation Uncertainty and Checking Sensor SWR To set up the equipment 1 2 Connect the equipment as shown in Figure 4 6 Turn on the sensor check source and set it to cw mode a Press the key b Press the check source function key until CW is highlighted Set the carrier frequency to 1 GHz a Press the CARRIER FREQ menu key b Enter 1 GHz using the keypad or the knob If the keypad is used the entry must be terminated with the key Press to automatically scale the signal to the Peak Power Analyzer display Wait until the message runnin appears at the top of the display before proceeding To measure sensor check source power 1 Make an automatic average power measurement a Press the BLUE key and then the AVG g key b Press 4 when C appears at the bottom of the display 4 25 Performance Tests 4 26 3 HP 8990A The display will read aue0i2 Hsm where XXX is the current average power measured The average power displayed should be between 8 9 mW and 11 2 mW 10 dBm 0 5 dB Change the sensor check source power to pulse a Select the menu b Set t
12. HP 8990A nT OCC te instrument Preset The Peak Power Analyzer has two methods of instrument preset s Key down power up is a hard preset of the Peak Power Analyzer It is done by pressing and holding down any front panel key while cycling power If input signals are not present the Peak Power Analyzer will power up displaying a baseline in the SHOW screen and be set to all default settings see table 3 1 a RECALL CLEAR performs a soft preset of the Peak Power Analyzer All default conditions are set see table 3 1 RECALL CLEAR is the same as a key down power up except that the previous menu selections before RECALL CLEAR was performed are retained Local Operation Table 3 1 Preset Default Conditions Timebase Menu reference Time Div delay timebase window Channel Menu Channel 1 Channel 2 3 and 4 Scale external loss Bandwidth Volts Div offset coupling probe attenuation Trigger Menu Mode triggering source level slope holdoff Display Menu Mode persistence Power Display off frame axes grid connect dots of screens cntr 100 ps 0 00 s off on With sensor connected off 1 mW Div 0 dB Auto 500 mV 0 00 de 1 000 1 edge auto Channel 1 0 0 W positive 40 ns norm minimum linear 3 5 Local Operation 3 6 HP 8990A Tabie 3 1 Preset Default Conditions continued Markers Time markers Amplitude markers Carrier Frequency chi ch4 Wavefor
13. a very stable signal to channels 2 and 3 Then the timebase and the measured delta t are used to calculate delta t accuracy according to the following equation ins 5E 5 x Delta t 0 02 x t division Digital averaging is used to minimize the influence of noise PEAK SIGNAL GENERATOR Figure 4 11 Checking Delta t Accuracy Equipment Setup 4 42 HP 8990A Equipment Procedure Performance Tests Signal Generator HP 8657B BNC Cable eduniccasoriun HP 10503A To set up the test equipment and the Peak Power Analyzer 1 2 3 4 Connect the equipment as shown in Figure 4 11 Set the signal generator to 100 MHz and 0 dBm Press on the Peak Power Analyzer Adjust the signal generator s output power until the waveform displayed on the Analyzer is between 6 and 8 divisions peak to peak Change the timebase to 5 ns division and set the delay to 0 00000 seconds using the following steps a b Select the TIMEBASE menu key Change the timebase top function key and the delay second function key by pressing the desired function key and entering the time using the keypad or the knob If the keypad is used terminate the entry with one of the time suffix keys Press the menu key Set the following parameters using the displayed menu a b Push the top function key until avg is highlighted Set the of avg to 2048 with the keypad or the knob If the keypad is used
14. if necessary Select the menu and set the following parameters using the displayed menu a Set the timebase to display one rising edge across two horizontal divisions Change the timebase with the knob or the keypad b Adjust the delay to move the waveform if necessary Select the menu and with the first function key set the display mode to avg The number of averages should still be set to 128 Give the display time to settle once avg is selected Adjust the timebase if the rising edge of the pulse no longer spans two divisions horizontally Make an automatic risetime measurement using the following steps 4 7 Performance Tests HP 8990A a Press the BLUE key and then the RISETIME 4 key b When C appears at the bottom of the display press 1 13 Read the risetime at the bottom of the Peak Power Analyzer display The risetime should be as shown in Table 4 2 To verify all Channel 1 and 4 risetimes 1 Repeat the section To verify the 5 ns risetime for the other power levels in Table 4 1 2 The results of this test may be entered in the Performance Test Record at the end of this chapter 3 Disconnect the peak power sensor from channel 1 and connect it to channel 4 4 Disconnect the TRIG signal from channel 3 and connect it to channel 2 5 Repeat the entire procedure to verify the risetime specifications for channel 4 To verify the risetime of Channels 2 and 3 PEAK PULSE
15. m Whether the sensor check source is present m The model number of the sensor connected to channel 1 The model number of the sensor connected to channel 4 m The temperature of the sensor for channel 1 n The temperature of the sensor for channel 4 m The thermistor resistance of the sensor for channel 1 m The thermistor resistance of the sensor for channel 4 HP 8990A Utility Menu update Key Instrument status information is not updated and displayed automatically When any of the parameters change there are two ways to update the information u By pressing the key When the show status menu is selected The update key may be pressed at any time to display new status information more Key This key accesses the second utility menu AR nr EER I TI tt et selftest menu The Peak Power Analyzer is designed to perform internal diagnostics This selftest submenu tests the Peak Power Analyzer to determine potential calibration errors 3 123 Utility Menu 3 124 Note HP 8990A If the Peak Power Analyzer is uncalibrated due to being serviced or an internal failure the selftests may fail If the selftests fail perform the calibrations listed under The Peak Power Analyzer has been Serviced portion of the Order of Calibrations section in this chapter Run the selftests again If the selftests still fail refer to the Peak Power Analyzer Service manual Before performing any self test do a ke
16. the bandwidth is the highest possible with the selected vertical sensitivity The following table lists representative performance for the three possible settings Bandwidth switching points are dependant upon circuit gain as well as ambient temperature Bandwidth may differ somewhat from unit to unit and over wide temperature swings HP 8990A external loss Key sensor zero Channel Menu Bandwidth Settings per division 10 nW 8 kHz ki T 600 He 600 He This key is used to enter an external loss caused by a coupler amplifier or cable Valid entries are 30 to 99 dB Scaling in linear mode and the reference level in log mode are changed accordingly when a loss is entered The size of the displayed waveform is not changed At power levels less than 10 uwatts the peak power sensor may contribute an offset that will affect the Peak Power Analyzer s accuracy specification The sensor zero key eliminates this offset If the power level is greater than 10 watts and the vertical sensitivity is set to display the signal the Peak Power Analyzer meets its accuracy specification without the use of the sensor zero key Using the sensor zero key is very easy e Select the channel to be zeroed 3 37 Channel Menu HP 8990A m The peak power sensor may remain connected to the RF source If the peak power sensor is disconnected from the RF source any ground loop currents are not zeroed out
17. unintended operation If this instrument is to be energized via an external autotransformer make sure the autotransformer s common terminal is connected to neutral that is the grounded side of the line Mains supply The Peak Power Analyzer requires a power source of 90 132 Vac or 198 264 Vac 48 to 66 Hz single phase Power consumption is 250 VA maximum Although the Voltage Selection Module indicates line mains voltage ranges of 110 120 Vac and 220 240 Vac Hewlett Packard guarantees this product will perform to all specifications over the full line mains voltage ranges of 90 132 Vac and 198 264 Vac 48 to 66 Hz and single phase HP 8990A Installation and Operator s Maintenance a rn i _NCM wT tt Line Voltage and Fuse Selection Caution Selecting the Line Voltage Checking for the Correct Fuse Before plugging the Peak Power Analyzer into the line mains voltage source ensure that the correct operating voltage and fuse have been selected The line voltage module has been factory set to the line voltage used in your country It is a good idea to check the setting of the line voltage module and become familiar with what it looks like If the setting needs to be changed do so by the following procedure Change the line voltage by pulling the module out and reinserting it with the appropriate arrows aligned Carefully pry at the top center of the module see figure 2 1 until you can gr
18. 20 Figure 3 7 Menus Section HP 8990A Local Operation 13 12 1 11 10 9 Figure 3 8 Rear Panel Features Chassis Ground In some industrial environments an excessive 60 Hz ground current may flow between the Peak Power Analyzer and the device under test The current is due to voltage drops between the grounds where the Peak Power Analyzer and the device under test are plugged in Under extreme conditions some 60 Hz interference may appear on the display This effect can be alleviated by powering the Peak Power Analyzer and the device under test from the same outlet or by using this connector to connect the two chassis together with a short piece of very stout wire or braid Channel 1 Sensor Input This is Option 002 The channel one sensor input is deleted from the front panel and placed on the rear panel Channel 4 Sensor Input This is Option 002 The channel four sensor input is deleted from the front panel and placed on the rear panel Power Cable Connection The supplied power cable is connected to the Peak Power Analyzer at this point 3 21 Locai Operation 3 22 13 12 Figure 3 8 5 HP 8990A 11 1 9 Rear Panel Features continued Line switch This switch is used to turn the Peak Power Analyzer on and off Line module The line module contains the line fuse and is used to match the power transformer to the available line voltage Intensity This is used to the adjust th
19. 43 Define Measure Menu The first menu allows you to set the dynamic controls for your measurement The second allows you to set user defined parameters for your measurements And the third allows you to set up the measurement comparison test Define Measure Menu T0000 i HP 8990A Measurement Selection Note It is very simple to make measurements from the keyboard Most keys in the numeric keypad section have a secondary function Above those keys the measurement selection is printed in blue There are thirteen measurements which can be made from the keypad z Risetime e Falltime a PRF Pulse Repetition Frequency PRI Pulse Repetition Interval Pulse Width a Offtime Pulse Offtime Duty Cycle w Delay s Top Pulse Top m Base Pulse Base a Overshoot z Average Average Power Measurement e Peak Peak Power Measurement The Peak Power Analyzer isn t able make automatic overshoot measurements when overshoot is greater than 50 It may be necessary to use the markers to make the measurement When Option 001 Single Sensor Input is installed channel 4 is not useable If an attempt is made to specify channel 4 as the source for a measurement the advisory channel is off measurement is aborted is displayed 3 109 Define Measure Menu HP 8990A To make an immediate measurement of the displayed waveform perform the following keystrokes a Press the blue Shift key on the
20. Check Source to demonstrate how to use the window feature 3 28 Timebase Menu HP 8990A 4s running nerep aa i OA T EEE ext loss 0 0008 IBR 150 MHZ ufreq 1 00 H2 el Oe eee N EES Be el Se IE EPE e PE E E 6 00900 t 00000 as 200 ussdi v NT aes 4 4 58 mk Figure 3 10 Input Signal for Window Viewing Setting the Peak Power Analyzer m Connect a peak power sensor to the Sensor Check Source and channel 1 Note Adapters HP 1250 1744 for the HP 84813A Peak Power Sensor and HP 11903D for the HP 84814A Peak Power Sensor will be needed These adapters are not supplied with the Analyzer a Disconnect the inputs to any other channels a Press and CLEAR There is approximately a five second delay while the preset function is being performed Press the DISPLAY menu key Press connect dots until on is highlighted a Press AUTOSCALE m Press the TIMEBASE menu key 3 30 HP 8990A Timebase Menu Press the window key until on is highlighted E Set the window timebase to 50 ps div Press the timebase key Press 5 0 us on the keypad Ae printing TINEBASE renate 200 us div otis ders nf ebegrenrentenbet fit caren off i paee g iakaat ii sebi 50 0 us diyv 350 000 us Figure 3 11 Input Signal with Window Turned on Note The timebase factors under the waveform display area have changed to reflect the window Viewing the Window The tim
21. Information Power Meter Accuracy 0 02 dB HP 437B P Frequency range 100 MHz Power Meter compatible HP 8482A Power Meter compatible HP 8485A Lop Power Meter compatible HP 8485D ea Frequency Range 100 Hz to 1 kHz HP 8116A Sensitivity 300 mVp p to 5 Vp p Power Supply Range 30 mV to 30 V HP 6114A P Accuracy 0 025 Risetime lt 500 ps HP 81314 Ta Harmonics lt 50 dBc HP 83624A Frequency 3 GHz Level 30 to 20 dBm Signal Generator Harmonics lt 50 dBc HP 83620A Frequency 3 GHz Level 30 to 10 dBm Signal Generator Frequency Range 1 MHz to 2 GHz HP 8657B Accuracy 0 003 Switch Driver No substitute HP 11713A ES HP 3245A P Tabie 1 3 Recommended Test Equipment continued Equipment Critical Specifications Recommended Model Peak Power Sensor No substitute HP 84812A 84813A and 84814A Signal Generator 1 18 This Page Intentionaily Left Blank 2 Installation and Operator s Maintenance Introduction This section provides the information needed to install and maintain the Peak Power Analyzer Included is information pertinent to initial inspection power requirements line voltage selection power cables interconnection environment instrument mounting storage and shipment In addition this section contains the procedures for setting the HP IB address Ee tt Initial Inspection Warning To avoid hazardous electrical
22. Menu taik only mode addressed mode EOI Key HP 8990A UTILITY only address t gt 32 EOI of f on form fesd off on peper tength Tf tn t2 In 3490178114 Figure 3 45 HP IB Menu Set the Peak Power Analyzer to talk only when performing a hardcopy of the display without intervention from an external controller The attached printer must be set to the listen only or listen always mode This mode allows a controlling device to selectively address the Peak Power Analyzer for talking or listening The address of the Peak Power Analyzer can be selected while the instrument is in the addressed mode The range of available addresses is 0 30 The EOI End or Identify key toggles this function on or off EOI is a line on the HP IB asserted with the last data byte of a message If this function is on EOI is asserted by the Peak Power Analyzer on the last byte of each message sent If it is off EOI is not asserted HP 8990A Utility Menu This function only affects messages sent from the Peak Power Analyzer The HP IB accepts any of the legal IEEE 488 2 message terminators regardless of the setting of this function Note IEEE 488 2 requires that EOI is asserted Therefore with EOI off the Peak Power Analyzer will send messages that do not follow IEEE 488 2 rules concerning EOL EOI should only be turned off if the controller does not deal with EOI appropriately form feed Key H the
23. Pattern trigger mode defines a four character pattern Mode for the Peak Power Analyzer to recognize and then generate a trigger event When the inputs satisfy the trigger pattern and conditions the Peak Power Analyzer triggers and displays the desired portion of the waveform Pattern trigger mode is very useful for glitch detection because the Peak Power Analyzer triggers on a glitch and displays the resulting waveform TRIG MENU PATTERN TRIGGER trig d auto HX X X EEE 2 na 16 ms 20ns t6 ms gt 20ns 160ms holdoff 4 ns 329ms lt 28ns 16 ms 34507 8L06 Figure 3 17 Pattern Trigger Menu The top two function keys remain the same as the Edge Trigger mode 3 50 HP 8990A pattern Key Note when Key Trigger Menu This is an unlabeled field The display depicts the 4 bit pattern The active field is displayed in fullbright and is changed with the function key The knob changes the active bit selection level Three levels are possible a H high m L low m X don t care The criteria for high is higher than the current trigger level and low is lower than the current trigger level The 4 bit pattern is representative of the four channel input For example if the pattern is LXXH the power on channel 1 must be lower than the trigger level set for channel 1 channels 2 and 3 are don t cares so the input levels are disregarded and the channel 4 input must be higher than the trigger level set fo
24. Press AUTOSCALE See figure 3 14 3 46 HP 8990A Trigger Menu e running 500 m div leffs 450 60 mV 1 000 3 f de Aertorversevanior vars 6 0 ans Gumuner QuunNOidNOINRIMMUHESIatiydidold eyal ma armiarma mni AML aga y daane ae dinden anne ek ake ataa 9 orr merienn 5 00000 us 0 00000 5 80000 us 1 00 us diyv 2 F 178 wW Figure 3 14 Two Burst Waveform after Autoscale m Select the menu key m Set the timebase to 500 ns division Change the timebase with the knob or the keypad If the keypad is used terminate the entry with a suffix key on the rightside of the keypad 3 47 Trigger Menu 3 48 fe running 2 50000 us Note HP 8990A TIMEBASE 506 ns Gi v 6 06006 s im reference left GR right a Pathener ergs g H i i Winden R e eoamer semmosen me yt semsas eusjeraa astat opo pi ctatel o vereverer evevarans os stusset sumiquncunas a ausat spanganat d 0 00000 s 2 50000 us 506 ne div tine Figure 3 15 Two Burst Pulse The Peak Power Analyzer sets up the display parameters It is now attempting to trigger on the first rising edge of the two cycle burst a Select the menu key Press the slope key This is the softkey below level The Peak Power Analyzer is now triggering on the first falling edge of the two cycle burst Press the slope key again to trigger on the positive edge The pulse generator is set for two 500 ns pulses Th
25. Time Division 3 26 time Key 3 131 Time Markers 3 86 time null submenu 3 131 Trig d auto Key 3 44 Trigger delay 3 41 Delay 3 64 edge 3 41 3 43 pattern 3 41 3 50 state 3 41 3 58 Trigger Channel 1 Output 3 23 Trigger Channel 4 Output 3 23 Triggered Scroll 3 26 Trigger Event 3 27 Triggering externally 3 42 internally 3 42 Trigger Level 3 43 3 45 Trigger Menu 3 41 trigger on Key 3 68 Trigger Source 3 45 Trigger Threshold 3 43 TTL Key 3 40 Turn on 3 1 Turn on Procedure 3 2 Index 13 index 14 Units function 3 95 Units Selection 3 35 User defined Pulse width A 5 Utility Menu 3 117 Vamp A 7 Vavg A T Vbase A 7 Verification instrument 2 10 Vertical Position 3 39 Vertical Scaling Key 3 35 Vertical Sensitivity 3 35 Vertical Sensitivity Key 3 38 Vmax A 6 Vmin A 7 volatile Key 3 103 Volatile Memory 3 103 Vp p A 7 Vrms A 7 Vtop A T Waveform Math Exercise 3 98 Waveform Math Menu 3 91 Waveform Memory 3 102 Waveform Memory Exercise 3 104 Waveform Memory Menu 3 101 waveform pixel Key 3 102 when Key 3 59 window Key 3 28 Window Key position Key 3 29 timebase Key 3 29 Windows functions 3 79 timebase window 3 79 Zeroing 3 37
26. a fast risetime pulse which is mixed with a 2 GHz local oscillator The resulting pulsed signal drives the peak power sensor The amplitude of the pulsed waveform is varied by changing the output power level of the local oscillator The risetime of each power range of the Peak Power Analyzer is checked by making automatic risetime measurements The risetime of video channels 2 and 3 is verified using a fast risetime pulse which is input directly to the Peak Power Analyzer 4 3 Performance Tests HP 8990A Note In the following procedure the risetime falltime specification is tested Thus if preferred wherever the term risetime is used the term falltime can be substituted in order to measure falltime Equipment Pulse Generator HP 8131A Signal Generator HP 8657B MINOR 5 pcaue oat seveecoen Watkins Johnson M85C Peak Power Sensor HP 84812A 848134 848144 or 84815A PEAK PULSE GENERATOR POWER ANALYZER anat penjol SIGNAL GENERATOR 3 dB ATTENUATOR Figure 4 1 Checking Channel 1 and Channel 4 Risetime Equipment Setup Procedure To set up the test equipment 1 Set the signal generator as follows a Mode CW b Output Level 0 dBm c Frequency 2 GHz 2 Set the pulse generator as follows a Mode Continuous pulse stream b Period 1 ms HP 8990A Performance Tests c Risetime lt 500 ps d Amplitude 0 5 volt e Duty Cycle 50 3 Connec
27. acquired As it samples and displays a message is displayed in the top left corner of the display indicating this acquisition mode m triggered scroll is used when in trig d mode and scrolled acquisition is required Triggered scroll acquisitions are not displayed until all data is available similar to normal acquisitions for display As data is being sampled the advisory a s to initialize is displayed while pre trigger data is collected and ns to complete is displayed while post trigger data is collected This message indicates the time needed to complete acquisition where n is the remaining time in seconds s Countdown continues until the time has elapsed The advisory running is displayed as the 3 26 HP 8990A a al delay Key cnet EE reference Key Timebase Menu write cycle to the screen is executed and displayed data is updated If the reference point see the reference key description is set to left the only advisory displayed is ns to complete because all data is post trigger When right reference is set all data is pre trigger and the advisory is n s to initialize Both the keypad and knob can be used to change the sweep speed Selection of the delay function assigns delay as the active function When delay is set to 0 the trigger event occurs at the delay reference point A positive delay allows viewing the waveform after the trigger event and a negative delay allows viewing the wavefo
28. delay cal INSTRUBENT CAL xe PROTECTED SYSTEM CAL ff erticel cal 1 delay cal channel EE lt 2 alt start cal continue abort exit menu HAL TRE Figure 3 49 Instrument Cal Options Vertical cal calibrates the vertical scale of the Peak Power Analyzer The calibration only needs to be done under a few conditions u The ambient temperature of the Peak Power Analyzer has changed since the last time a vertical cal was performed 3 132 HP 8990A Note Note Note Utility Menu For maximum accuracy calibration of the Peak Power Analyzer should be performed only if the temperature of the Peak Power Analyzer not the sensor has changed significantly The accuracy error for every degree Celsius deviation from the last calibration is 0 15 deg C 0 006 dB deg C The temperature of the Peak Power Analyzer also has an effect on the trigger level accuracy of channels 1 and 4 z The Peak Power Analyzer was repaired m The ROMs have been replaced If the Peak Power Analyzer is repaired or the ROMs are replaced additional calibrations other than those listed in this section need to be performed Refer to the Order of Calibrations section described earlier in this chapter Delay cal sets the absolute time skew values from the physical trigger event to the trace timing display of the trigger event Channel 1 is used as the reference point For the channel being calibrated the trigger referen
29. explained in the Utility Menu sectio of this manual i This field is not labeled However the available selections are graphic representations of the rising edge and falling edge The current selection is highlighted in inverse video Pressing the holdoff key assigns the entry devices to control holdoff Holdoff disables the trigger circuit for a selectable time period after the trigger event Holdoff is selected in time units from 40 ns to 320 ms 3 45 Trigger Menu HP 8990A inupunamasaniane ete a amma Holdoff Exercise This exercise sets up the Peak Power Analyzer and a pulse generator to view some of the features of the edge trigger Holdoff is used to gain a stable trigger This technique is not necessary for most applications and waveforms However for many non recurring and irregular waveforms it is useful Pulse Generator Set the pulse generator as described below The signal Setup for this exercise is a burst pattern with two positive cycles that repeat every 5 us Use an HP 8116A Pulse Generator with the burst option or a another instrument capable of the same signal Make the following settings e MODE LBUR w RPT 5 00 ps mw BUR 2 s FRQ 1 MHz a DTY 50 a AMP 1V a OFS 200 mV mw Signal square wave Peak Power Analyzer Connect the pulse generator to channel 2 Setup a Remove any inputs to the other channels w Press the DISPLAY menu key Press connect dots until on is highlighted m
30. for the specified period of time and then overwrite old data m Minimum persistence is very fast overwrite As each new acquisition is displayed it overwrites the previous data The current display is always the most recent acquisition m Fast persistence settings are useful when the input signal is changing and immediate feedback is needed m More persistence is useful when observing long term changes in the signal or low signal repetition rates m Infinite persistence can be used for worst case characterizations of signal noise jitter or drift etc In this mode the Peak Power Analyzer is used as a storage oscilloscope When the keypad is used to change persistence settings any entry longer than 10 seconds displays the message value out of range set to limit and persistence is set to HP 8990A avg env Display Menu infinite Any entry less than 200 ms displays the same message and persistence is set to minimum When norm is selected the function key beneath the norm field is activated This field displays the current persistence setting and is set with either of the entry devices Connect the dots is only available when minimum persistence is selected Averaged mode selects the number of waveform acquisitions that are averaged to generate the displayed waveform The range for the averaging function is 1 2048 in powers of 2 When averaged mode is selected the next function key is activated and the number of av
31. form feed option is on the printer performs a formfeed at the end of the hardcopy If formfeed is off the page is scrolled up four lines when the hardcopy is complete paper length Key Select between 11 inch or 12 inch page lengths for auto form feed This is used to set the 11 inch page the U S standard or the 12 inch page U K and European standard exit menu Key Pressing this key returns to the Utility menu Tn rt tt A clicker Key The clicker key turns on the clicker function When the clicker is turned on an audible click is heard each time a key is pressed The selections are either on or off 3 121 Utility Menu check source Key Note aana tI A show status menu 3 122 HP 8990A ES tt This key turns the front panel Sensor Check Source on or off The Sensor Check Source is used during delay calibration for channels 1 and 4 and to verify operation of the peak power sensor The signal output is a 1 GHz signal either pulsed or CW If pulsed is selected the signal is pulsed at a 1 5 kHz rate Settling time for the Sensor Check Source is two to three seconds The Sensor Check Source is turned on or off by pressing the key until the desired function is highlighted The show status key displays the following instrument status information m Instrument model number m Firmware revision m Whether the baseband board for channel 1 is present m Whether the baseband board for channel 4 is present
32. key 4 13 Performance Tests 4 14 HP 8990A b Select the scale softkey and enter 200 nW div using the numeric keyboard and key T Press the bandwidth softkey and choose lew to select low bandwidth 8 Set digital averaging to 128 as listed in Table 4 2 in order to limit noise interference a Press DISPLAY b Select avg with the first function key C Set of avg to 128 using the second function key and then the knob To zero the sensor 1 Turn the RF power output of the signal generator off but leave the sensor connected to both the RF connector and the Analyzer 2 Select sensor zero under the CHAN VERT menu When sensor zeroing is complete the Analyzer displays Sensor zero completed 3 Turn the signal generator RF power output on again To verify measurement accuracy at 32 dBm 1 Make an automatic average power reading of CH 1 a Press the BLUE key and then the AVG g key b Press 1 when C appears at the bottom of the display The display will read syo 13 SEX where XXX is the current average power in units of mW uW or nW The Analyzer average power reading should be between 586 and 674 nW as listed under Analyzer Measured Power in Table 4 2 It may be necessary to wait about HP 8990A Performance Tests two minutes for the display to stabilize because of the digital averaging before reading the average power level To check power measurement range accuracy 1 D
33. load on one side of the tee and another BNC tee on the other side Connect the signal from the pulse generator to one side of the second tee using a one meter coaxial cable With another one meter cable connect the other side of the second tee to a BNC tee on channel 3 Place a 50 Q load on the other side of the tee on channel 3 The extra cable length between channels 2 and 3 provides a time delay between the signals displayed on the Peak Power Analyzer The propagation of a one metre coaxial cable is approximately 6 to 7 ns This time delay is used to demonstrate the Peak Power Analyzer s triggering capability 3 53 Trigger Menu Peak Power Analyzer Setup 3 54 HP 8990A E Press AUTOSCALE m Select the TIMEBASE menu key m Set the following timebase parameters using the knob or the keypad Keypad entries need to be terminated with one of the suffix keys on the rightside of the keypad Timebase 10 00 ns div delay 0 00 s reference cntr window off w Select the menu key m Set the following channel 2 parameters Vertical sensitivity 500 mV div offset 200 00 mV de coupling m Set the following channel 3 parameters Vertical sensitivity 500 mV div offset 200 00 mV de coupling m Select the menu key Set the following display parameters Mode norm minimum persistence 2 screens axes m Select the menu key m Set the following trigger parameters Channel 2 level 200
34. mV Channel 3 level 200 mV Set the trigger mode to pattern HP 8990A Trigger Menu Press the second softkey until pattern is highlighted m Set the pattern to XHLX as follows Press the third function key until the first character is highlighted Turn the knob until the highlighted area is an H Select the next character in the pattern and repeat the procedure Continue until all characters are selected in the XHLX pattern Press the when key until entered is selected The display should be similar to the following figure Ap running PATTERN TRIGGER Sam esse a aa cet A te Se a a hla ee dN trig d edge ppoe State delay x H i x 506 000 ns 9 90000 s 10 0 ns div ee wonsa a seva Figure 3 18 XHLX when entered Pattern Channel 2 is displayed in the top screen To satisfy the conditions of the bit pattern channel 2 must be high higher than the channel 2 trigger level or greater than 200 mV When the signal on channel 2 goes higher than 200 mV and channel 3 is still low less than 200 mV the pattern conditions have been satisfied as the 3 55 Trigger Menu 3 56 HP 8990A signal is entering the trigger conditions and the Peak Power Analyzer triggers m Press the when key and change the condition to when exited The Analyzer triggers on the first transition that makes the bit pattern false in this case when channel 3 goes high Ap running PATTERN TRIGGER remate ta
35. memory Press SAVE and then select a save register 1 2 3 or 4 An advisory is displayed above the waveform display area indicating the setup configuration has been saved The SHOW key accesses the following information w Channel scaling m Channel offset Channels 2 and 3 m Channel coupling Channels 2 and 3 m Probe attenuation Channels 2 and 3 e Trigger source e Trigger level HP 8990A Local Operation a Math function operation a Math function scaling z Math function offset a Memories Pressing the SHOW key toggles between the currently selected menu and the SHOW screen as illustrated As running Sep nh Apia A dc pe pee E yee wires ij sext fess G 000dB BH 150 MHz Sfreq 1 00 GHz 1 00000 a 6 00000 e 200 us div 1 00000 as 1 F AB Figure 3 4 Show Key This screen presents the most complete and detailed instrument setup information Select this screen before making a hardcopy and all SHOW screen information is included on your hardcopy 3 15 Loca Operation HP 8990A Entry The Entry device section contains a multi function numeric keypad a selection knob and a fine key Figure 3 5 Entry Section 3 16 HP 8990A Numeric Keypad KNOB FINE Local Operation The keys on the numeric keypad are for direct numeric input To input known values directly press the associated softkey to activate the desired field on screen and then select the units with the numeric
36. not holdoff 48ns 32 ms Figure 3 22 State Trigger Menu The trig d auto and trigger mode function keys remain displayed in all trigger modes Select any channel to be used as the state clock Select the channel by pressing the function key until the desired channel is highlighted The clock selection is reflected in the next field with an arrow pointing either up for a positive slope or down for a negative slope The when key depicts the desired pattern The displayed pattern shows the arrow at the selected clock channel The other three channels define the logic pattern that must be satisfied to generate a trigger event using the H L X convention described in the Pattern Trigger Mode To change the pattern m Press the function key until the bit to be changed is highlighted 3 59 Trigger Menu present Key holdoff Key HP 8990A m Rotate the knob until the desired setting is highlighted m Select the arrow to change the trigger slope if necessary and turn the knob until the desired settings appear A trigger event is generated on the selected edge when the pattern is true and is present is selected or a trigger occurs when the pattern is false and not present is selected The holdoff key assigns the entry devices to control holdoff Holdoff disables the trigger circuit for a selectable time period after the trigger event Holdoff is selected in time units from 40 ns to 320 ms sam iii a aaa
37. numeric keypad to access the secondary keys w Press the key that corresponds to the measurement m Rotate the knob to select the measurement source channel number c memory number m or function number f The choice is displayed below the waveform display area m Press the appropriate number to select the source channels 1 4 memories 1 4 or functions 1 2 To make a selected measurement on a waveform source it must be turned on Upon selection of the measurement the time and amplitude markers are placed on the waveform to show where the measurement was made if continuous measurements are off To clear measurements press Shift blue key CLR MEAS For complete details of the measurement definitions and algorithms see Appendix A Algorithms a eens neennn rr a ss meas meas This key is the primary sub menu function key Press def meas limit Key to select one of the available sub menus This field is always the top selection so other submenus can be selected at any time 3 110 HP 8990A Define Measure Menu Measure Sub menu continuous Key Statistics Key The measure submenu is the default condition The continuous and statistics options can also be accessed H this option is turned on when a measurement selection is made the displayed measurement is updated periodically All subsequent measurements are continuously updated as they are selected When cont
38. of instrument setups SHOW screen for quick access to channel function and trigger information Local Operation 3 12 HP 8990A AUTOSCALE Figure 3 3 Setup Section This key causes the Peak Power Analyzer to evaluate all input signals and set the correct conditions to display the signals For sensor channels 1 and 4 autoscale is usable on signals in the range of 20 dBm to 20 dBm It takes from 5 to 30 seconds to find and display the signal s Autoscale will run faster when unused sensors are unplugged and unused channels are turned off The first autoscale after power up will run slower than subsequent autoscales HP 8990A Note Local Operation If signals are present on more than one vertical input the sweep triggers on channel 2 if a signal is present on that channel If a signal is not present on channel 2 the Peak Power Analyzer triggers on channel 3 if a signal is present on that channel If a signal is not present on channel 3 the Peak Power Analyzer triggers on channel 1 if a signal is present on that channel or on channel 4 if no other signals are found If no signals are found on any vertical input the Peak Power Analyzer is returned to its former state Under certain conditions executing autoscale repeatedly on the same signal may produce a different sweep speed each time When AUTOSCALE is pressed the following conditions are set w Vertical sensitivity on all channels w Verti
39. of a Getting Started Guide Operating Manual Programming Manual and a Service Manual These four volumes contain all the information required to install operate test adjust and service the Peak Power Analyzer The Operating Manual which is shipped with each instrument contains information covering the following w General Information m Installation m Operation a Performance Tests The Getting Started Guide quickly helps the user become familiar with the basic functions of the Peak Power Analyzer The Programming Manual contains all the necessary information to operate the Peak Power Analyzer remotely Both the Getting Started Guide and Programming Manual are shipped with each instrument General Information Specifications Safety Considerations 1 2 HP 8990A The Service Manual can be ordered with the Peak Power Analyzer as Option 915 The Service Manual contains the following sections m Service Introduction mw Repair u Calibration Reference In the United States and Canada additional copies of the Operating Manual Getting Started Guide Programming Manual or the Service Manual may be ordered separately by calling Hewlett Packard s Direct Marketing Division at 1 800 538 8787 In Europe additional copies of the documentation may be obtained by calling your nearest Hewlett Packard office The part numbers of the manuals are listed on the title page of this manual Warranted and supplemental spec
40. part numbers of these power cables Cables are available in different lengths and some with right angle plugs to the instrument installation and Operator s Maintenance HP 8124 1351 HP 8128 1369 BS 1363A PLUG NZSS 198 AS 3132 PLUG UNITED KINGDOM HP 8128 1378 HP 8128 1575 NEMA 5 15P IEG 328 014 U S CANADA NOT INTERCHANGEABLE WITH 8128 4753 HP 612 2956 HP 8122 4211 BHOR 127 PLUG IEC 83 STD Bt SABS 164 NEUTRAL REPUBLIC OF SOUTH AFRICA DENMARK HP 8990A HP 8122 1689 CEE 7 STO SHT VII DIN 49441 YOE 820 HP 8128 2184 SEY 1811 1959 24597 TYPE 12 PLUG HP 8128 4753 MITI 41 9892 PLUG CNOT INTERCHANDEABLE WITH 8322 1378 Figure 2 3 Power Cable and Line Mains Plug Part Numbers Installation and HP 8990A Operator s Maintenance EERE ee mnt Interconnections Hewlett Packard Interface Bus Interconnection data for the Hewlett Packard Interface Bus is provided in figure 2 4 Hewlett Packard Interface Bus Connection Peak Power Sensor The connection from the Peak Power Analyzer to the Peak Power Sensor is made through a cable that is part of the sensor The sensor cable comes in various lengths Refer to the peak power sensor manual for more information Mating Connectors a HP IB Interface Connector The HP IB mating connector is shown in figure 2 4 Hewlett Packard Interface Bus Connection Note that the two securing screws are metric Coaxial Connector This type o
41. power measurement using the following procedure a Press the BLUE key and then the AVG g key b Press 1 when C appears at the bottom of the display If C is not displayed use the knob to display C 2 Select the menu and set the following parameter using the displayed menu a Select the scale function key b Using the knob or the keypad set the scale to 500 pW division If the keypad is used terminate the entry with the uW key on the right side of the keypad 3 Adjust the signal generator output power to 2 mW as shown in Table 4 2 under Input Signal as Measured 4 Select the menu and set the following parameters using the displayed menu HP 8990A 10 Li 12 Performance Tests a Highlight select avg with the first function key b Set the number of averages to 128 using the second function key Use the knob or the keypad to set the number of averages If the keypad is used terminate the entry with any of the suffix keys on the right side of the keypad Fine tune the signal generator power level so the average power at the bottom of the Peak Power Analyzer display reads 2 mW Adjust the vertical scale CHAN VERT menu of channel 1 so the waveform spans at least three divisions Select the menu and with the first function key set the display mode to norm Select the menu and set the bandwidth to high Adjust the vertical scale to span three divisions
42. results of this test in the Performance Test Record at the end of this chapter To check Channel 2 and 3 trigger sensitivity from 1 MHz to 100 MHz 1 Disconnect the signal generator output from channel 3 and connect it to channel 2 2 Change the signal generator output to 100 MHz and 0 dBm 3 Press AUTOSCALE 4 Adjust the signal generator amplitude for a 500 mV peak to peak signal as displayed on the Peak Power Analyzer 5 Adjust the Peak Power Analyzer trigger level for a stable display If the display can be stabilized the trigger sensitivity from 1 MHz to 100 MHz test passes If a stable trigger level is not found the test fails 6 Repeat this procedure for channel 3 7 If any of the measurements fail refer to the troubleshooting section in the Peak Power Analyzer Service Manual If necessary you may record measurement results in the Performance Test Record at the end of this chapter 4 41 Performance Tests HP 8990A Checking Delta t Accuracy Specification Electrical Performance Conditions Characteristics Linuts Delta t 1 ns 5E 5 x Delta t 0 02x t division Accuracy 1 Delta t accuracy for dual cursor single channel measurement or for channel to channel measurement after visual time null calibration has been done Description Timebase linearity and the 100 MHz startable oscillator accuracy are the variables that determine delta t accuracy Delta t accuracy is checked by supplying
43. settings activate the next field as appropriate so the specific time parameters can be set If the state trigger option is selected the next two function keys define the state conditions As in State Trigger mode select the channel to define the state clock This selection is reflected in the pattern with an arrow The slope is depicted with the arrowhead pointing up or down Use the function key to move the highlighted bit to change the pattern the knob changes the bit level When the pattern is set the is not present setting can be changed by moving the highlight to the is not present field label When the label is highlighted toggle the setting between is not present with the knob HP 8990A delay Key Note Trigger Menu This field selects between two delay options To change between the time and count options rotate the knob until the desired option is displayed in the inverse video field delay time disables the trigger circuit for a selected period of time from 30 ns to 160 ms after the trigger has been qualified Time delay is not available in the time qualified pattern settings of when present gt when present lt or range m Press the function key until the highlight is on the first numeric field This field selects the amount of delay after qualification ranging from 30 ns to 160 ms delay count delay by edges disables the trigger circuit for a selected count from 1 to 16 000 000 after the trigger has
44. shock do not turn on the instrument when there are signs of shipping damage to any portion of the outer enclosure covers panels display Inspect the shipping container for damage If the shipping container or cushioning material is damaged it should be kept until the contents of the shipment have been checked for completeness and the Peak Power Analyzer has been checked mechanically and electrically The contents of the shipment should be as shown in figure 1 1 Procedures for checking electrical performance are given in Section 4 If the contents are incomplete if there is mechanical damage or defect or if the Peak Power Analyzer does not pass the electrical performance tests notify the nearest Hewlett Packard Installation and Operator s Maintenance HP 8990A office If the shipping container is damaged or the cushioning material shows signs of unusual stress notify the carrier as well as the Hewlett Packard office Keep the shipping materials for the carrier s inspection ST i i A a Power Requirements Warning Note 2 2 This is a Safety Class product that is it is provided with a protective earth terminal An uninterruptible safety earth ground must be provided from the main power source to the product input wiring terminals through the power cable or supplied power cable set Whenever it is likely that the protection has been impaired the product must be made inoperative and be secured against any
45. the following paragraph for the part number of the Programming Manual 1 5 General Information Accessories Supplied Accessories Available HP 8990A Additional Programming Manual or Getting Started Guide Additional copies of the Programming Manual or Getting Started Guide may be ordered by calling Hewlett Packard s Direct Marketing Division at 1 800 538 8787 in the United States and Canada In Europe the manuals may be obtained by calling your nearest Hewlett Packard office The part numbers of the manuals are as follows Getting Started Guide 08990 90003 and Programming Manual 08990 90002 The accessories supplied with the Peak Power Analyzer are listed below and shown in figure 1 1 m Power Cable Refer to figure 2 3 Power Cable and Line Mains Plug Part Numbers for the part number of your power cable a 50 2 BNC Coaxial Cable HP Part Number 10503A Electrical 30 dB Attenuator This is a 25 Watt 30 dB fixed attenuator with a frequency range of DC to 18 GHz This attenuator allows peak power measurements to 25 Watts The part number of the attenuator is HP 8498A Option 030 APC 3 5 mm Adapter This is an APC 3 5 mm female to Type N male adapter The adapter is needed to connect the HP 84813A Peak Power Sensor to the Sensor Check Source The part number of the adapter is HP 1250 1744 2 4 mm Adapter This is a 2 4 mm female to Type N male adapter The adapter is needed to connect the HP 84814A Pea
46. 14 GHz From HP 84812A sensor manual 4 3 Mismatch Uncertainty 2 x 0 24 x 0 11 x 100 5 3 TOTAL RSS UNCERTAINTY 4 3 6 4 3 5 3 7 7 Total RSS Measurement Uncertainty in dB 7 7 10log 1 0 077 10log 1 077 0 32 dB 7 7 10log 1 0 077 10log 0 923 0 35 dB General information HP 8990A Table 1 3 Recommended Test Equipment Equipment Critical Specifications Recommended Use p Model Adapter BNC to HP 1251 2277 Banana Plug Adapter Type N HP 1250 1474 to BNC Attenuator Attenuation 30 dB HP 11708A Reference Attenuator Attenuation 3 dB HP 8493C P Frequency Range dc to 8 GHz SWR 1 1 Attenuator Step Attenuation 0 70 dB HP 8495G Step Size 10 dB Attenuator Attenuation 20 dB HP 8491A P Frequency Range de to 1 GHz Option 020 BNO Te mae Cable BNC _ 10503 Cable Sensor No substitute HP 84812 60008 gt 4 Mbytes RAM EP Model 900 HP IB Interface series 200 300 3 5 inch dual sided floppy drive Load 50 Q Frequency de to 1 GHz HP 908A Double Balanced Watkins IF Port de coupled Johnson M85C LO amp RF Ports 2 GHz LO Drive 7 dBm Conversion Loss lt 9 dB Single Sideband HP sasa P 1 A Adjustments P Performance T Troubleshooting O Operational Verification 2 Watkins Johnson 3333 Hillview Ave Palo Alto California 94304 1204 1 16 Mixer HP 8S90A Genera
47. 4 8 Checking Power Measurement Haise 410 Specification oR oe cae i Description TEE 4 10 Equipment PGs die 4 10 Contents 9 Procedure ds OH a ja ok gt To set up the test equipment To set up the Analyzer calibrate power 2 To zero the sensor To verify measurement PI a 32dBm To check power measurement i range accuracy aoaaa a Checking Instrumentation Uncertainty Specification Description Controllers 2 2 Operating System ae Equipment a Gwe Rowe ce Ae a Installing the Software Using a Floppy Disc Drive Using a Shared Resource Management SRM or Hierarchical File a HFS Hard Disc EAE Running the Software Checking Sensor Check Source Power eval Specification aooaa Description phe Equipment 0 65 2 a ee Procedure ae e a Sek To set up the equipment To measure sensor check source pone Checking Bandwidth Specification aa Description Equipment s wa Gs Procedure To set up the test equipment aid Peak Power Analyzer To verify the bandwidth laits oc Channels 2 and 3 Checking Offset Accuracy Contents 10 4 1 4 1 4 13 4 14 4 15 4 17 4 17 4 17 4 17 4 18 4 18 4 19 4 19 4 19 4 19 4 24 4 24 4 24 4 24 4 25 4 25 4 25 4 97 4 97 4 97 4 97 4 98 4 38 4 30 Specification aa Description Eq
48. AL GENERATOR HP B99 A PEAK POWER METER POWER ANALYZER POWER PO SENSOR SENSOR itiiweacenew Figure 4 3 Checking Power Measurement Range Equipment Setup Procedure Note The measurement limits given in this procedure take into account the system measurement uncertainty They are included though this is not a measurement accuracy test If the recommended Hewlett Packard test equipment is used for this test the measured value will fall within the range given If test equipment with different specifications is used for this test the system measurement uncertainty must be recalculated To set up the test equipment 1 Set the signal generator output as follows a Mode CW no modulation 4 11 Performance Tests HP 8990A b Frequency 3 GHz c Output level 28 dBm 2 Set the average power meter by zeroing it and entering the HP 8485D or equivalent sensor calibration factor for 3 GHz If necessary refer to the operating manual of the average power meter for these calibration procedures To set up the Analyzer 1 Set the Analyzer carrier frequency to 3 GHz a Press the menu key b Press the top function key until chi ch4 is highlighted c Enter 3 GHz with the knob or the keypad 2 Turn channel 1 on and all other channels off a Press the CHAN VERT menu key b Select highlight the channel with the top function key c Turn the channel on or off with the second function key 3 Set t
49. AVE eo aak a a a aa e SB 3 14 SHOW aaa aL 4 3 14 EDTV ook win a I ae a En A a 3 16 Numeric Keypad 2 3 17 KNOB ten ve char 2S aR ee 3 17 EINES cat ad Stee a a eres ee TS 3 3 17 Tiputa No ee os ae 0 BW 4 at a 3 18 Sensor Check Source 2 2 3 18 Display Se de ae ae ee an A PERS 3 18 Men s is v os amp hie 49 en Gm we h 3 19 Timebase Menu Introduction to the Timebase hte 3 25 Time Div Key 3 26 delay Key 00 4 3 27 reference Key 24 3 27 Window Key 3 28 timebase Key 04 4 3 29 position Key tahoe 2 ae Soe a 3 29 Contents 3 Contents 4 3 Window example Setting the Peak Power Analyzer ia Viewing the Window Channel Menu Introduction to Channels Channel Key Channels 1 and 4 Vertical scale key 2 2 0 reference level Key log mode only Bandwidth Key 2 2 external loss Key 2 Sensor ZerO s Sk en A a Channels 2and3 2 204 Vertical Sensitivity Key 2 offset Key 2 2 coupling Key ae more preset probe Key Channel more Key probe Key 2 2 gt iya BCL Key lt 2 hoe ee oe SS eS CELEKey porom om ee Bee ds ow Ge A more Key 26 55 138 he ee OE Trigger Menu Introduction to the Triggers Single Sensor Input Option Triggering Internally or Externally Trigger Mode Interaction 2 Edge Trigger Mode 2
50. Cal The service menu is used primarily for software settings and hardware adjustments These are explained in the service manual and are to be used only by qualified service personnel One calibration needed for the software calibration of the Peak Power Analyzer is in the service menu When the ROMs have been replaced or the instrument has been serviced the default calibration factors must be set before continuing with the instr cal menu To set the default cal factors perform the following steps The default calibration returns the following calibration factors to default settings Logic Trigger Delay Cal Vertical Cal Delay Cal Probe Cal and Time Null Cal If you run the default calibration you must continue with a full instrument calibration Refer to the Peak Power Analyzer has been Serviced portion of the Order of Calibrations section discussed earlier in this chapter m Select the service menu m Press the cal select key until 3 default cal is displayed in the window and default cal is highlighted a Press start cal and continue when the instructions are displayed When a default cal has been performed it is necessary to run the logic trigger delay cal The steps used for selecting this calibration are the same used to select the default calibration m Select the service menu 3 137 Utility Menu HP 8990A Press the cal select key until 0 logic trigger delay cal is displayed in the
51. ER ANALYZER BANANNA TO BNC ADAPTER Figure 4 8 Checking Offset Accuracy Equipment Setup Power Supply yu esi dew tee ye va HP 6114A BNC to Banana Plug Adapter HP 1251 2277 HP 8990A Procedure Performance Tests To set up the test equipment and the Peak Power Analyzer 1 Connect the equipment as shown in Figure 4 8 2 Press and then on the Peak Power Analyzer aw Adjust the power supply to read 1 00 volt On the Peak Power Analyzer press the menu key and select highlight grid with the fifth function key ee 5 Set the timebase to 1 ys division using the following steps a Select the menu key b Set the timebase using the keypad or the knob If the keypad is used terminate the entry with the ps key 6 On the Peak Power Analyzer turn channel 2 on and the other channels off using the following steps a Press the CHAN VERT menu key b Press the top function key and select highlight the desired channel c Press the second function key until on or off is highlighted To verify offset accuracy for Channel 2 1 Set the Peak Power Analyzer scale to 100 mV division with the following steps a Press the third function key b Set the scale using the keypad or the knob 2 Set the Peak Power Analyzer coupling to de 4 31 Performance Tests 4 32 Note 3 HP 8990A a Press the fifth function key until de is highlighted Set the offset on the Peak Power Anal
52. GENERATOR Figure 4 2 Checking Channel 2 and Channei 3 Risetime Equipment Setup 1 Set up the equipment as shown in Figure 4 2 2 Set the pulse generator as follows HP 8990A Performance Tests Period 20 us Risetime lt 500 ps Amplitude 0 5 volt Press on the Peak Power Analyzer Select the menu and set the following parameter using the displayed menu Set the timebase to 5 ns division using the top function key Change the timebase with the knob or the keypad If the keypad is used terminate the entry with the ns key on the right side of the keypad Make an automatic risetime measurement using the folowing steps Press the BLUE key and then the RISETIME 4 key When C appears at the bottom of the display press 1 If C is not displayed rotate the knob Read the risetime at the bottom of the Peak Power Analyzer display The risetime measured by the Peak Power Analyzer should be less than 5 ns Disconnect the cable from channel 2 and connect it to channel 3 Repeat the procedure for channel 3 If the Peak Power Analyzer and peak power sensor fail any or all parts of this procedure refer to the Peak Power Analyzer Service Manual to determine whether the Peak Power Analyzer or the peak power sensor is at fault If necessary results of this procedure can be recorded in the Performance Test Record at the end of this chapter Performance Tests HP 8990A Checking Power
53. HX when entered Pattern XHHX when exited Pattern State Trigger Menu XTLX State ee ee as ee XIHX State cow foe ees 1 3 2 4 2 4 2 6 3 8 3 9 3 12 3 15 3 16 3 19 3 20 3 21 3 25 3 30 3 31 3 34 3 44 3 47 3 48 3 49 3 50 3 55 3 56 3 57 3 58 3 59 3 63 3 64 Contents 13 Contents 14 3 25 3 26 3 27 3 28 3 29 3 30 3 31 3 32 3 33 3 34 3 39 3 36 3 37 3 38 3 39 3 40 3 41 3 42 3 43 3 44 3 45 3 46 3 47 3 48 3 49 4 1 4 2 4 4 4 6 Delay Trigger Menu 2 2 Ten Burst Pulse after AUTOSCALE Ten Burst Pulse w Stable Trigger Ten Burst Pulse Triggered on Pulse 5 Ten Burst Pulse Triggered on Pulse 9 Display Menu a Dual Screen Display Quad Screen Display Connect the Dots 2 04 Markers Menu Carrier Frequency Menu Waveform Math Menu Single Screen w Function On Dual Screen w Function On Quad Screen w Function On Waveform Memory 1 minus Channel 1 Waveform Memory Menu Displayed Memory Define Measure Menu Utility Menu a a Eo Di ay 8G HP IB Menu Selftest Menu aooaa aa Results of Selftest 2 aaua Probe Cal Menu aaa wk Instrument Cal Options Checking Channel 1 and Channel 4 Risetime Equipment Setup Checking Channel 2 and Channel 3 Risetime Equipment Setup Checking Power Measurement Range Equipment Se
54. INE switch to ON 1 The Peak Power Analyzer turns on to the same control settings it had before line power was removed An exception to this is that it always turns on in the local mode In addition some HP IB default conditions are enabled The Peak Power Analyzer goes through the following power up sequence s HP 8990A Peak Power Analyzer and a pulse are displayed for approximately three seconds HP 8990A Local Operation HP 8990A Peak Power Analyzer Power Up Display During this period the Peak Power Analyzer tests the non volatile RAM Checksums are verified for the calibration data and the previous instrument settings If a calibration checksum error is detected an advisory is displayed indicating that a calibration is required If the cal RAM is protected the advisory is cal ram checksum error re cal instrument If the cal RAM is unprotected the advisory is default cal loaded re cal instrument In either case refer to the instr cal menu under the Utility Menu Perform the vertical cal and delay cal procedures If an instrument setting checksum error of non volatile memory is detected a recall of default settings is performed automatically The show screen is displayed This screen indicates active channel trigger and function information The menu which was active when the Peak Power Analyzer was turned off is replaced by the show screen 3 3 Local Operation
55. IR P O TWISTED PAIR WITH 6 DAV REN EO prog D104 DIO DIO3 DIOS DId2 DIOS DIO1 ISO METRIC THREAD M3 5 x 6 4 PIN MICRO RIBBON SERIES 37 CONNECTOR Logic Levels The Hewlett Packard Interface Bus Logic Levels are TTL compatible i e the true 1 state is 0 0 Vde to 0 4 Vdc and the false 0 state is 2 5 Vde to 5 0 Vdc Mating Connector HP 1251 0293 Amphenol 57 30240 Mating Cables Available HP 10833A 1 metre 3 3 ft HP 10833B 2 metres 6 6 ft HP 10833C 4 metres 13 2 ft HP 10833D 0 5 metre 1 6 ft Cabling Restrictions 1 A Hewlett Packard Interface Bus system may contain no more than 2 metres 6 6 ft of connecting cable per instrument 2 The maximum accumulative length of connecting cable for any Hewlett Packard Interface Bus system is 20 0 metres 65 6 ft Figure 2 4 Hewlett Packard Interface Bus Connection 2 19 installation and Operator s Maintenance HP 8990A Operator s Maintenance Procedures Warning For continued protection against fire hazard replace the line fuse with a 250V fuse of the same rating only Do not use repaired fuses or short circuited fuseholders Operator s maintenance consists of replacing defective fuses The primary power fuse is located within the Line Power Module Assembly Refer to the section on Checking for the Correct Fuse for instructions on how to change the fuse 2 20 Local Operation Introduction Turn on Instructions Warning N
56. Key 3 40 Edge Definition A 3 Edge Trigger 3 41 Edge Trigger Exercise 3 46 Edge Trigger Mode 3 43 Electrical Accessories 1 6 Entry 3 15 Fine Key 3 17 Knob 3 17 Numeric Keypad 3 16 Envelope Display Mode 3 77 Environment operating 2 16 storage 2 17 EOI Key 3 120 Errata 1 4 Exercise Delay Trigger 3 68 Edge Trigger 3 46 Pattern Trigger 3 53 State Trigger 3 60 Waveform Math 3 98 Waveform Memory 3 104 exit menu Key 3 121 3 126 3 130 3 136 external loss Key 3 37 External Triggering 3 42 fail if 3 115 Falltime A 6 Falltime measurements A 1 Fine Key 3 17 3 26 Firmware Revision 3 117 form feed Key 3 121 Front Panel System Control 3 8 Front Panel Features 3 7 Function display units 3 95 Function Key 3 93 Function Keys 3 18 Functions displaying 3 96 Fuse changing 2 3 Fuse selection 2 3 Gain cal 3 132 Getting Started Guide 1 1 Hardcopy Key 3 10 holdoff Key 3 45 3 52 3 60 Horizontal Axis 3 26 HP IB Address 2 1 2 14 HP IB Connector 2 7 HP IB menu 3 119 Incoming Inspection 2 1 Initial Inspection 2 1 Input Connectors 3 17 Inspection initial 2 1 instr cal menu 3 132 Instruments covered by this manual 1 4 Intensity display 3 22 Intensity Control 2 10 3 22 Interconnections Hewlett Packard Interface Bus 2 7 Peak Power Sensor 2 7 Internal Triggering 3 42 Index 5 Index 6 Key abort 3 130 3 135 add to memory 3 104 after fail 3 115 ampl
57. M with the necessary calibration data to characterize the sensor The sensor supplies the Peak Power Analyzer with the calibration data when connected to Analyzer Periodically the Analyzer measures the temperature of the sensor and adjusts the calibration data accordingly to maintain accurate measurements Automatic adjustment of calibration data is specified over a sensor temperature range of 0 to 55 C For maximum accuracy calibration of the Peak Power Analyzer should be performed only if the temperature of the Peak Power Analyzer not the sensor has changed significantly The accuracy error for every degree Celsius deviation from the last calibration is 0 15 deg C 0 006 dB deg C The vertical calibration procedure which performs this calibration is explained in the Utility Menu section of this manual 3 107 Define Measure Menu 3 108 Define MEAS meas meas def standard continuous aff on on statistics off on meas limit test eff on set meas faii I gt aave te OFF mi m4 pt p2 printer after fail stop continue user upper detay of ft ime puisewidth threshold upper tower uppers lowers mid threshold mid threshold lower threshold risetime faiitime PRF PRI 1 PRF gt pulsewidth offtime duty cycle delay peak pulse base puise top overshoot average HP 8990A trom edge at upper mid lower to edge at upper mid lower Figure 3
58. Measurement Range Specification Description Equipment Electrical Performance Conditions Characteristics Limits Power Measurement Range 32 to 20 dBm al The power measurement range of the Peak Power Analyzer is measured using a microwave source with wide dynamic range and low harmonics spurious signals The source signal is first measured with an accurate average power meter system In this manner the source output is calibrated to the average power meter system Then the calibrated signal is measured with the Peak Power Analyzer and peak power sensor The tolerance on the Peak Power Analyzer measurement includes the root sum squared RSS uncertainty of the average power measurement The RSS uncertainty is comprised mainly of mismatch errors sensor calibration factor uncertainty and power meter measurement errors Signal Generator HP 83624A or HP 83620A Attenuator he gcse hee Genes HP 8493C Attenuator ssensera HP 11708A Power Meter 08 HP 437B Power Sensor 0 HP 8485A Power Sensor HP 8485D Peak Power Sensor HP 84813A HP 8990A Performance Tests Note In order to test the upper limit of the power measurement range 20 dBm the HP 83624A or signal generator with equivalent critical specifications as listed in the Recommended Test Equipment Table is required However you can use the HP 83620A or equivalent to test to 10 dBm SIGN
59. Null fe 3 aaa probe cal Menu ey era attenuation submenu channel Key 8 start cal Key a o ek ae ee eS continue Key ee abort Key aod a a6 amp ek exit menu Key time null submenu channel Key time Key ea eee Ve See exit menu Key 93 4181 instr cal menn 6 4 6 6 bce Go ewe ol Ae a 3 132 cal select Key as ssa ew Sk a A A134 channel Key ceo se ew ew 3 434 start cal Key 9134 Vertical Cal 240 6 ida See ee wwe be 3 134 Delay Cal so Siow 6 GA ee ale 135 continue KEY a 2 lt lt dae 4G oo we FBS abort Key Gow area A ee Ce amp 136 exit menu Key 2 3 136 If Calibration Fails 3 136 service menu beh ae lp Xe SSIS Default Cal OMe ee Ber Logic Trigger A Cal ee Oe Bs a SSS more Key Swi ok tay He ee SESS Performance Tests Introduction Seo ae Gah oea 4 1 Equipment Required a 4 1 Performance Test Record 4 1 Calibration Cycle a aaa aaa 4 1 Performance Test Procedures 4 2 Checking Risetime Falltime 4 3 Specification ee ar re 4 3 Description ar a ae 4 3 Equipment ee ee ee 4 4 Procedure 8 2 ao 4 4 To set up the test equipment 4 4 To set up the Peak Power Analyzer 4 5 To verify the 5 ns risetime 4 6 To verify all Channel 1 and 4 idactihies 4 8 To verify the risetime of Channels 2 and3 i as et
60. OMs have been replaced an assembly has been replaced or the instrument has been repaired the following calibrations need to be performed in the order listed x Default Cal m Vertical Cal on channels 2 and 3 a Logic Trigger Delay Cal Vertical Cal on all channels For Option 001 perform the Vertical Cal on channels 1 2 and 3 only 3 127 Utility Menu Probe Cal Time Null HP 8990A m Delay Cal on all channels For Option 001 do not perform the Delay Cal on channel 4 Default Cal and Logic Trigger Delay Cal are described in the Service Manual and where the service menu is described near the end of this chapter Vertical Cal and Delay Cal are described in the instr cal menu section of this chapter This calibration applies to channels 2 and 3 The calibration procedure is described in the probe cal Menu section of this chapter Time null sets the timing difference between channels Using time null is described in the time null submenu section of this chapter probe cal Menu 3 128 Two probe calibration procedures are available in the probe cal menu attenuation a time null HP 8S90A Utility Menu Probe Cai MENU attenuation Start cal continue abort exit menu time null time exit menu Figure 3 48 Probe Cal Menu attenuation submenu The attenuation submenu is only used with channels 2 and 3 It is used to calibrate gain at the tip of a probe Channel gai
61. P 8990A Signal Generator HP 8657B To set up the test equipment and the Peak Power Analyzer i Connect the equipment as shown in Figure 4 10 2 Press the menu key and select highlight grid with the fifth function key To check Channel 2 and 3 trigger sensitivity from dc to 1 MHz 1 Set the signal generator to 1 MHz and approximately 0 dBm 2 Press AUTOSCALE on the Peak Power Analyzer 3 Adjust the trigger level for a stable display if necessary with the following steps a Press the menu key b Adjust the level with the knob or the keypad If the knob is used press the key for more resolution 4 Adjust the signal generator amplitude for a 200 mV peak to peak signal as displayed on the Peak Power Analyzer If desired use the following steps to adjust the vertical sensitivity of the channel a Select the menu b Press the third function key c Change the vertical scale with the knob or the keypad If the keypad is used terminate the entry with one of the suffix keys on the right side of the keypad HP 8990A on Performance Tests Adjust the Peak Power Analyzer trigger level for a stable display If the display can be stabilized the trigger sensitivity from dc to 1 MHz test passes If a stable trigger level is not found the test fails Repeat the channel 2 and 3 trigger sensitivity procedure from dc to 1 MHz for channel 3 If necessary you may record the measurement
62. R VERTICAL SCALE 50 nW division to 20 mW division in 1 2 5 sequence INSTRUMENTATION UNCERTAINTY including noise and offset 23 5 5 PSU x 100 Signal Power Video Inputs Channels 2 amp 3 Channels 2 and 3 are limited dynamic range scope inputs optimized for external triggering using digital signals Extended range can be achieved by using attenuating probes BANDWIDTH dc coupled Repetitive de to 100 MHz 3 dB Single Shot de to 1 MHz 10 points per pulse BANDWIDTH ac coupled Repetitive 10 Hz to 100 MHz 3 dB Single Shot 10 Hz to 1 MHz 10 points per pulse RISETIME lt 5 ns VERTICAL GAIN ACCURACY DC 41 5 OFFSET ACCURACY 2 of offset 0 2 x V division 1 The sensitivities given apply to one screen per display If two or four screens are displayed sensitivities decrease by a factor of two or four respectively 2 With a displayed signal height gt 2 divisions and using 128 averages 3 Instrumentation uncertainty is one of the factors that affects overall power measurement accuracy For a listing of the other factors that affect overall power measurement accuracy and an example of how to calculate it refer to Table 1 2 Calculating Overall Power Measurement Accuracy General information HP 8990A Table 1 1 Specifications continued Video Inputs Channels 2 amp 3 continued MAXIMUM INPUT VOLTAGE 100 volts de peak ac lt 10 kHz VERTICAL SENSITIVITY 100 mV division to 500 mV
63. State Trigger Exercise 3 60 This exercise demonstrates how an input pattern is used to qualify a clock edge as a trigger State triggering extends the logic triggering capability of the Peak Power Analyzer by selecting one of the inputs as a clock and using the other inputs as qualifiers This is useful when it is necessary to synchronize the display with a system clock to detect a system state For example consider a synchronous memory bus State trigger mode enables you to see only those events that occur when reading from a block of memory HP 8990A Puise Generator Setup Peak Power Analyzer Setup Trigger Menu To perform the following exercise use an HP 8116A Pulse Generator or another pulse generator capable of producing the same signal Set up the Pulse Generator as follows m Mode NORM u FRQ 1 00 MHz a DTY 50 w AMP 1 00 V a OFS 200 mV Connect a BNC tee to channel 2 of the Peak Power Analyzer Place a 50 Q load on one side of the tee and another BNC tee on the other side Connect the signal from the pulse generator to one side of the second tee using a one meter coaxial cable With another one meter cable connect the other side of the second tee to a BNC tee on channel 3 Place a 50 Q load on the other side of the tee on channel 3 The extra cable length between channels 2 and 3 provides a time delay between the signals displayed on the Peak Power Analyzer The propagation of a one metre c
64. Tests 4 2 Performance Test Procedures HP 8990A These tests are designed to verify published instrument specifications Perform the tests in the order given and record the data in the Performance Test Record In order to consider a performance test valid the following is assumed a The Peak Power Analyzer has had a one hour warm up period before the tests are performed m The person who performs the test understands how to use the specified test equipment w The tests are performed under normal operating conditions as stated in the specification table z The person who performs the test supplies whatever cables connectors and adapters are necessary m For certain tests measurement limits are calculated using specific equipment As noted in the tests these limits must be recalculated if equipment other than that specified is used a A user calibration of the peak power measurement system is run prior to performance of these tests HP 89S0A Performance Tests Checking Risetime Falitime Specification Characteristics Limits Channels 1 amp 4 Risetime 10 90 Falltime 90 10 0 to 20 dBm 16 to 0 dBm 26 to 16 dBm 32 to 26 dBm Channels 2 amp 3 Risetime Falltime 1 The optional 20 foot long peak power sensor cable degrades the specified risetime to 10 ns Specification for the HP 84815A is lt 45 ns Description The risetime for RF channels 1 and 4 is measured using
65. Trigger level 1 4 V w Trigger slope no change To return to the previous settings press RECALL 0 The more key toggles between the two levels of the channel 2 and 3 menu Trigger Menu Introduction to the Triggers The trigger modes of the Peak Power Analyzer provide many distinctive techniques to trigger and capture data The triggering capabilities range from simple edge triggering to logic triggering on multiple signals This chapter contains descriptions of the triggering modes explanations on how to use them and exercises detailing some real life applications The Peak Power Analyzer has four triggering modes m edge m pattern a state a delay Single Sensor Input Option When Option 001 Single Sensor Input is installed channel 4 is not useable No error is reported when channel 4 is specified in one of the trigger modes Although an error is not reported the Peak Power Analyzer won t trigger on the measured waveform 3 41 Trigger Menu HP 8999A nner TT AA tt Triggering Internally or Externally Note 3 42 The minimum triggerable pulse width for channels 2 and 3is 7 ns Trigger quality for channels 1 and 4 degrades for pulses narrower than 500 ns For signals gt 30 dBm internal triggering of channels 1 and 4 has a minimum triggerable sensitivity of 25 of full scale and a bandwidth of dc to 1 MHz At some vertical sensitivities the Channel Menu low bandwidth setting may ha
66. a ampl appears in the factors display area The delta ampl entry is calculated as the following marker 2 marker 1 delta ampl If delta ampl is negative marker 1 is located at a more positive amplitude than marker 2 marker 2 This function key is a two function control field The first function selects the desired channel memory or function to place marker 2 for measurement By pressing the function key again the highlighted field moves to the numeric display to select the amplitude level Typically place marker 2 at the desired level on the waveform display and read the level both in the highlighted field and in the factors area of the waveform display Marker 2 is the amplitude marker with shorter dashes marker 1 Marker operation is identical to marker 2 except it is represented by longer dashes 3 85 Markers Menu HP 8990A EAs aaaea time markers This function key toggles the time markers on and off With the function turned on the next two fields are activated the two markers are controlled individually The markers are placed on the display respective of the trigger point Positive time values are to the right of the trigger point and negative time values are to the left Delta t values are determined by the following stop marker start marker delta t A negative delta t means that the start marker is placed later in time than the stop marker 1 delta t is the inverse of delta t Since the inverse
67. ak Power qt Connect the equipment as shown in Figure 4 7 Set the signal generator to 100 kHz and 0 dBm Analyzer Press on the Peak Power Analyzer Press the menu key and select highlight grid from the displayed menu Set the Peak Power Analyzer scale to 100 mV div using the following steps a Press the menu key b Select the third function key c Set the scale to 100 mV div using the keypad or the knob If the keypad is used terminate the entry with the mV key Adjust the signal generator output power so the waveform is exactly eight divisions peak to peak Adjust the offset as needed to center the waveform on the Peak Power Analyzer display using the following steps a Select the fourth function key b Set the offset with the keypad or the knob If the knob is used more resolution may be selected by pressing the key On the average power meter enter the calibration factor for 100 kHz To verify the bandwidth limits of Channels 2 and 3 1 Set the power meter to make a relative measurement Make the reference 0 dB HP 8990A Cr Performance Tests Change the signal generator to 100 MHz Set the Peak Power Analyzer timebase to 10 ns division using the following steps a Press the TIMEBASE menu key b The timebase is enabled highlighted when the menu is selected Adjust the timebase using the keypad or the knob Adjust the Peak Power Analyzer t
68. ak Power Analyzer on 2 Push the menu key and observe the Utilities menu on the display 3 Press selftest menu and then test all If the selftest menu key is not displayed press the more key As each test is completed the test name and the results of the test PASSED or FAILED are displayed The System RAM Non volatile RAM Display RAM Protected Non volatile RAM System ROM Acquisition RAM Logic Trigger Timebase D A Converter HP IB and A D Converter are all tested If any of the self tests fail refer to the Peak Power Analyzer Service Manual 4 Press the exit menu key 5 Refer to the instr cal menu under the UTILITY menu to perform the Vertical Cal and Delay Cal procedures installation and Operator s Maintenance Front Panel Checks Note HP 8990A Equipment Peak Power Sensor HP 84812A 848134 84814A or 84815A The Peak Power Analyzer requires a one hour warm up enable to guarantee specified measurement accuracy 1 Press the key and then the key 2 Connect the peak power sensor to Channel 1 and the sensor check source An adapter may be needed to make the connection 3 Connect the AC CAL OUTPUT on the rear panel of the Peak Power Analyzer to Channel 3 4 Push the key When the message at the top of the display changes from executing autoscale to running the Peak Power Analyzer displays the power envelope of the pulsed waveform in one win
69. alyzer Hiermit wird bescheinigt dass dieses Ger t System in Ubereinstimmung mit den Bestimmungen von Postverfiigung 1046 84 funkenst rt ist Der Deutschen Bundespost wurde das Inverkehrbringen dieses Gerdtes System angezeigt und die Berechtigung zur berpr fung der Serie auf Einhaltung der Bestimmungen einger umt Zusatzinformation f r Mess und Testger te Werden Mess und Testger te mit ungeschirmten Kabeln und oder in offenen Messaufbauten verwendet so ist vom betreiber sicherzustellen dass die Funk Entst rbestimmungen unter Betriebsbedingungen an seiner Grundst cksgrenze eingehalten werden Manufacturer s Declaration This is to certify that this product meets the radio frequency interference requirements of Directive FTZ 1046 1984 The German Bundespost has been notified that this equipment was put into circulation and has been granted the right to check the product type for compliance with these requirements Note If test and measurement equipment is operated with unshielded cables and or used for measurements on open setups the user must ensure that under these operating conditions the radio frequency interference limits are met at the border of his premises DEE eee nnn eee ene eee eee 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 measure
70. and then cross the lower threshold without crossing the upper threshold A 3 Algorithms Note HP 8990A Most time measurements are made based on the position of the first crossing of the middle threshold a aman nee tt TT ON Algorithm Definitions delay A 4 Following are the definitions that all measurements are based on There are three types of delay measurement m jitter a standard m user defined Jitter occurs only under the following circumstances m standard user defined key is set to standard m two delay parameters are the same m display mode is envelope if first edge on minimum waveform is rising then delay mid threshold of first rising edge of max waveform minus mid threshold of first rising edge on min waveform else delay mid threshold of first falling edge on min waveform minus mid threshold of first falling edge on max waveform The standard delay measurement occurs when in the standard mode not user defined and is not a jitter measurement HP 8990A Aigorithms standard delay mid threshold of the first edge of second parameter minus mid threshold of the first edge of the first parameter Note Negative delay is possible User defined delay second channel edge minus first channel edge Pulse Width The pulse width algorithm has standard and user defined considerations if first edge is rising then Pulse width mid threshold crossing of first falling edge minus
71. annel Key 3 130 3 131 3 134 Channel Key 3 35 Channel Menu 3 32 3 33 Channel Selector Key 3 89 Chassis Ground 3 21 check source Key 3 122 Clear Display Key 3 10 Clearing Measurements 3 110 clear memory Key 3 104 clicker Key 3 121 clock Key 3 59 CLR MEAS key 3 110 Connect Dots Key 3 80 Connector AC Cal Output 3 23 DC Cal Output 3 23 Trigger Channel 1 Output 3 23 Trigger Channel 4 Output 3 23 Connectors coaxial 2 7 HP IB 2 7 input 3 17 Peak Power Sensor 2 8 Type N 2 8 continue Key 3 130 3 135 continuous Key 3 111 Continuous Measurements 3 111 coupling Key 3 39 CRT 3 18 Data Entry 3 15 DC Cal Output 3 23 Default Calibration 3 137 Default Settings 3 4 Define Measure Menu 3 107 Definitions Algorithms A 4 Delay A 4 reference point 3 27 delay Key 3 67 Delay Key 3 27 Delay Trigger 3 41 Delay Trigger Exercise 3 68 Delay Trigger Mode 3 64 Description Peak Power Analyzer 1 4 Device Under Test 3 89 Diagnostics 3 123 Display 3 18 axes 3 80 frame 3 80 grid 3 80 Displaying Functions 3 96 Display Intensity 3 22 display Key 3 93 3 103 3 104 Display Menu 3 75 Display Mode average 3 77 envelope 3 77 3 102 normal 3 76 Display Mode Key 3 76 Display Screens 3 96 Display Units 3 95 Documentation 1 1 Getting Started Guide 1 1 index 3 Index 4 Operating Manual 1 1 ordering 1 2 Programming Manual 1 1 Service Manual 1 1 Duty Cycle A 6 ECL
72. are available through Hewlett Packard offices Mark the container FRAGILE to encourage careful handling In any correspondence refer to the Peak Power Analyzer by model number and full serial number 2 17 Installation and Operator s Maintenance 2 18 HP 8990A Other Packaging The following general instructions should be used for repackaging with commercially available materials l L Wrap the instrument in heavy paper or plastic If shipping to a Hewlett Packard office or service center complete one of the blue tags mentioned above and attach it to the Peak Power Analyzer Use a strong shipping container A double wall carton made of 2 4 MPa 350 psi test material is adequate Use enough shock absorbing material 75 to 100 mm layer 3 to 4 inches around all sides of the Peak Power Analyzer to provide a firm cushion and prevent movement in the container Protect the front panel with an appropriate type of cushioning material to prevent damage during shipment Seal the shipping container securely Mark the shipping container FRAGILE to encourage careful handling Installation and HP 8990A Operator s Maintenance SIGNAL GROUND P O TWISTED PAIR WITH 11 P O TWISTED PAIR WITH 18 SHOULD BE GROUNDED p70 TWISTED PAIR WITH 9 NEAR TERMINATION OF OTHER WIRE OF P O TWISTED PAIR WITH B SHIELD lt CONNECT ATN TO EARTH SRO GROUND IFC NDAC P O TWISTED PAIR WITH 7 NRFD TEIR B
73. asp and pull it out by hand If you find it necessary to check or change fuses remove the module and look at each fuse for its amperage and voltage ratings Refer to figure 2 2 Checking for the Correct Fuse and Table 2 1 Fuse Rating and Part Numbers Tabie 2 1 Fuse Ratings and Part Numbers 90 132 Vac 2110 0083 198 264 Vac 2 5A 2110 0083 1 Fuses are Time Delay slow blow Fuses 2 3 installation and Operator s Maintenance HP 8990A 90 132 Vac 198264 Vac Figure 2 2 Checking for the Correct Fuse HP 8990A l Instailation and Operator s Maintenance iE al Power Cables Warning BEFORE CONNECTING THIS INSTRUMENT the protective earth terminals of this instrument must be connected to the protective conductor of the line Mains power cable The line plug shall only be inserted in a socket outlet provided with a protective earth contact The protective action must not be negated by the use of an extension cord power cable without a protective conductor grounding Grounding one conductor of a two conductor outlet is not sufficient protection The Peak Power Analyzer is shipped with a three wire power cable When connected to an appropriate ac power receptacle this power cable grounds the instrument chassis The type of power cable plug shipped with each instrument depends on the country of destination See figure 2 3 Power Cable and Line Mains Plug Part Numbers for the
74. asurement can be redefined by edge slope edge count from 1 to 100 and what part of the transition edge upper lower mid is used as a reference point When setting edge count fields it is handy to press the fine key In the coarse mode the Peak Power Analyzer increments decrements by tens 1 11 21 100 In the fine mode the increment decrement sequence is in I s When the delay measurement is selected from the front panel the sources c f m and the source number must be selected next Pulsewidth chooses only the point on the waveform transition upper lower mid to measure when making the positive width of a displayed waveform Offtime chooses only the point on the waveform transition upper lower mid to measure when making the negative width of a displayed waveform 3 113 Define Measure Menu HP 8990A Measure Limit Sub menu 3 114 Note test Key set Key The Peak Power Analyzer can run limit tests on up to three measurements The menu presets certain conditions and stores any failure data for evaluation at a later time Set your limit test while in this menu and select the measurement from the front panel When a test is running statistical data is displayed describing the test s current measurement a minimum value a maximum value m average value Failure data as well as information regarding memory and save data is displayed At least one measurement and up to t
75. away tilt stands for convenience in bench operation The plastic feet are designed to ensure self aligning of instruments when stacked The tilt stands raise the front of the instrument for easier viewing of the front panel Rack Mounting 2 16 Rack mounting information is provided with the rack mounting kit If the kit was not ordered with the Peak Power Analyzer as an option it may be ordered through the nearest Hewlett Packard office Refer to Mechanical Options in Section 1 installation and HP 8990A Operator s Maintenance Storage and Shipment Environment The Peak Power Analyzer should be stored in a clean dry environment The following environmental limitations apply to both storage and shipment Temperature 40 C TO 71 C Humidity lt 95 relative Altitude lt 15 300 metres 50 000 feet Packaging Tagging for Service If the Peak Power Analyzer is being returned to Hewlett Packard for service please complete one of the blue repair tags located at the end of this manual and attach it to the instrument To minimize repair time be as specific as possible when describing the failure Keep the following two items in mind when describing the failure 1 Describe what makes you think the Peak Power Analyzer is failing 2 If the failure only occurs under certain conditions explain how to duplicate the failure Original Packaging Containers and materials identical to those used in factory packaging
76. been qualified After the selected count has been attained the Peak Power Analyzer will look for the user specified trigger edge m Press the function key until the highlight is on the first numeric field This field selects the number of edges to delay after the trigger has been qualified from 1 to 16 000 000 m Press the function key once more to activate the rising edge falling edge option and select the desired edge using the knob m Press the function key once more to highlight the third option field and select the channel to delay on m Press the function key a fourth time to return to the first numeric field 3 67 Trigger Menu trigger on Key HP 8990A This key selects a specific edge to trigger on after the qualification and delay conditions have been satisfied All other keys in this menu have dealt with defining qualifying conditions However this field sets the trigger point This is another three position option switch mw Press the function key to highlight the numeric field and select which occurrence to trigger on Use the knob to set the occurrence 1 to 16 000 000 m Press the function key again to move the highlight to the slope The knob toggles the selection between rising and falling edge m Press the function key again and highlight the channel selection The knob is used to change the channel selection Delay Trigger Exercise 3 68 Pulse Generator Setup This exercise demonstrates
77. cal offset on channels 2 and 3 m Sets trigger to edge mode with minimum persistence holdoff positive slope and proper trigger level for the trigger source m Sweep speed of displayed channel z Linear mode display for channels 1 and 4 In addition Autoscale includes a soft reset a Displays the correct number of screens a Channels without a signal are turned off m Turns markers off Turns all measurements off m Turns measurement limit test off a Turns waveform math functions off e Turns timebase window off 3 13 Local Operation 3 14 RECALL SAVE SHOW HP 8990A Turns waveform pixel memory display off The previous Peak Power Analyzer settings are stored in volatile memory RECALL 0 To recall settings press RECALL 0 The RECALL key has three primary functions a By pressing the RECALL key and then selecting 1 2 3 or 4 the Peak Power Analyzer executes a recall of a previously saved setup configuration u The Peak Power Analyzer automatically saves the current configuration before executing an autoscale recall or setting up ECL TTL presets RECALL 0 is an undo of these actions You cannot save to register 0 wm RECALL CLEAR executes an instrument reset and returns the Peak Power Analyzer to default power up settings The Peak Power Analyzer does not perform power up self tests see Instrument Reset The SAVE key immediately stores the Peak Power Analyzer setup configuration in non volatile
78. ce point is set to the center of the screen and trigger delay is set to zero Before the Peak Power Analyzer can be calibrated the CALIBRATION toggle switch on the rear panel must be set to UNPROTECTED When the software calibrations are complete reset the CALIBRATION toggle switch on the rear panel to PROTECTED 3 133 Utility Menu 3 134 cal select Key channel Key start cal Key HP 8990A This field selects which of the calibration processes to perform Press the cal select key and the highlighted window increments through 0 1 The active field in the display changes to correspond with the selection The channel key selects the channel to calibrate When the channel to calibrate is selected and the specific cal routine is selected press the start cal key and follow the displayed instructions The following information will make performing the calibrations easier Vertical Cai 1 Perform the calibration after a minimum of a one hour warm up after power on Not allowing a one hour warm up will not cause the instrument to fail but specified accuracy is not guaranteed 2 When calibrating channels 1 or 4 there must not be any RF present at the sensor input Either disconnect the sensor from the Peak Power Analyzer or ensure that any signal at the sensor input is at most 60 dBm the Peak Power Analyzer has the capability of detecting very small nW signals If the sensor remains connected ensure that
79. d RAM memory volumes for fast access of data files These volumes may also be used by other programs and could contain data that will be erased by the program Make sure that the computer you are using does not have important data in any memory volumes before running this software 1 Make sure that the software has been copied into a directory Gf HFS or SRM or copied to a work disk if running from a floppy 2 Set the default mass storage to the directory or floppy disk that contains the test software This is done using the BASIC MSI command See the BASIC Language Reference for more information on setting the default mass storage 3 Load the program by typing LOAD IUM_8990 and pressing ENTER or RETURN 4 Start the test program by typing RUN and pressing ENTER or RETURN 4 19 Performance Tests HP 8990A 5 The program will ask you for the unit under test s serial number and installed options Enter the appropriate information A menu containing the available tests will be displayed Simply select the test you wish to run using the arrow keys and hit RETURN Individual tests will prompt you with connection instructions or other relevant test information Respond in an appropriate manner When the test has completed a test report will be output and then you will return to the test menu This test will require 20 minutes per channel Either select another test to run or press the QUIT softkey to
80. d is within 0 4 divisions of the center horizontal line HE any portion of this test fails refer to the Peak Power Analyzer Service Manual If necessary you may record the measurement results of this test in the Performance Test Record at the end of this chapter 4 33 Performance Tests HP 8990A Checking Channel 1 and Channel 4 Trigger Sensitivity 4 34 Specification Description Electrical Performance Characteristic Limits Trigger 0 25 x full scale Sensitivity Bandwidth a Internal Trigger gt 30 dBm Equal to video bandwidth Internal Trigger when lt 1 MHz The channel 1 and channel 4 trigger sensitivity performance test verifies that the Peak Power Analyzer can trigger on a signal equal to the specified sensitivity A signal generator is connected to the Peak Power Analyzer The signal generator output is slowly decreased and a stable trigger level is found for various signal levels The minimum triggerable signal level is then measured SIGNAL GENERATOR PEAK POWER ANALYZER POWER SENSOR Figure 4 9 Checking Channel 1 and Channel 4 Trigger Sensitivity Equipment Setup HP 8990A Equipment Procedure Performance Tests Signal Generator HP 83620A or HP 83624A Peak Power Sensor HP 84812A 84813A 84814A 84815A To set up the test equipment and the Peak Power Analyzer 1 Set the signal generator as follows Frequency 3 GHz Out
81. dBm 0 5 dB is available at the Sensor Check Source output The Sensor Check Source can be set to either off CW or pulse When set to pulse the signal is pulsed at a 1 5 kHz rate The Sensor Check Source is controlled through the Utility Menu At power up or preset the Sensor Check Source defaults to pulse een ae Display 3 18 The Display section contains the screen and menu softkeys The vertical column on the right side of the screen is the function display The functions that are displayed at any one time will correspond to a softkey The softkeys select any function or field that is displayed in halfbright HP 8990A Menus FUNCTION KEYS BFS 10 8 3638 Local Operation 0 00 80000 Figure 3 6 Function Keys w Numeric key fields displayed in fullbright are changed by the numeric keys or the knob When these functions are not active they are displayed in halfbright when the functions are displayed in fullbright they are active m Non numeric fields displayed in halfbright toggle with the corresponding softkey These fields are displayed in halfbright but are active for the softkey The Menus section consists of ten keys Timebase m Channel Vertical m Trigger z Display m Markers m Carrier Frequency 3 19 Local Operation HP 8990A m Waveform Math a Waveform Memory a Define Measure m Utilities Each of these menus is discussed in the following chapters 3
82. delay trigger mode and describes how to trigger on a specific point of a waveform Set up an HP 8116A Pulse Generator or another pulse generator to produce a burst pulse with ten bursts that repeats every 50 ps Set up the HP 8116A Pulse Generator a Mode L BUR a RPT 50 ps a BUR 10 aw FRQ 5 0 MHz a DTY 50 a AMP 1 00 V a OFS 200 mV Connect the signal to channel 2 of the Peak Power Analyzer HP 8990A Trigger Menu Peak Power Analyzer Autoscale will be used to display the signal However Setup for our purposes it is necessary to make triggering changes Press the DISPLAY menu key Press connect dots until on is highlighted Press AUTOSCALE 45 running AAEE P a ver BArIEbe Ly Mtynntdminoeli Ionandmmmarar se re eov na Pawee a rvaumumansnnnere t RSH Stage erareeririade crervarnsrreevaris ler se arem se o r rierarvasarvananratsnonsaate tat gglfetsnt sates i2 O 500 wWvaiy lofts 500 0 sY 21 600 1 dc Prevanrersarvirrvaaras setie t appien aala pias tt Iamm mirar emmenar tat m ae are ant aenertia sise d s remorin sam ma ensversiauimuanisntoyetirtoysnteruss 10 0000 us G 00060 s 16 0000 us 2 00 us div 2 f 228 w Figure 3 26 Ten Burst Pulse after AUTOSCALE u Select the menu key u Make the following trigger selections Highlight trig d Highlight delay trigger mode Press Qualify n until edge is highlighted Press the fourth softkey until 2 is highlighted Set the s
83. division AVAILABLE OFFSET RANGE 26 volts INPUT IMPEDANCE 1 MQ 16 pF INPUT COUPLING ac de Sensor and Video Inputs Channels 1 2 3 and 4 MANUAL MARKER RESOLUTION 0 4 of full scale CHANNEL TO CHANNEL ISOLATION Channel 2 to Channel 3 30 dB de to 100 MHz Channel 2 to Channel 1 and Channel 3 to Channel 4 40 dB de to 100 MHz video bandwidth Time Base RANGE 2 ns division to 5 s division in a 1 2 5 sequence ACCURACY 0 005 DELTA t ACCURACY 1 ns 5E 5 x Delta t 0 02 x t div DELAY RANGE posi trigger Time Base Available Delay 50 ms s 40 x s division 100 us 20 ms is 2 ns 50 us 10 000 x s division 1 Deka t accuracy for dual marker single channel measurement or for channel to channel measurement after visual time null calibration has been done HP 8990A General Information Table 1 1 Specifications continued Time Base continued DELAY RANGE pre trigger Time Base Available Delay 10 ps 5 s 40 x s division 20 ns ps 200 us 2 ns 10 ns 10 000 x s division TIME BASE RESOLUTION 100 ps Internal Triggering Channels 1 and 4 SENSITIVITY 0 25 x full scale and gt 30 dBm BANDWIDTH de to 1 MHz External Triggering Channels 2 and 3 SENSITIVITY 0 2 Vpp de 1 MHz 0 5 Vpp 1 MHz 100 MHz BANDWIDTH dce to 100 MHz TRIGGER PULSE WIDTH MINIMUM 7 ns 1 Channel 2 or 3 should be used as the triggering channel when timebase settings of less than 10 ns divis
84. djustment on an oscilloscope However offset on the Peak Power Analyzer has a range of 16 divisions from center screen The coupling key has several selection variables mac a ac bandwidth limit m dc m de bandwidth limit Bandwidth limit reduces the effective bandwidth to 20 MHz It reduces the noise in the display path as well as the trigger path The more key toggles between the two levels of the channel 2 and 3 menu This key shows the user which channel is being affected Also the key allows access to one of the other channels The probe key selects probe attenuation with a range of 0 9000 1 to 1000 1 Attenuation is adjusted by either the knob or keypad When the knob is in coarse mode adjustments are incremented or decremented in the familiar 1 2 5 sequence When in FINE mode adjustments are in 0 1 increments Probe attenuation affects scaling factors for the display not sensitivity at the input Attenuation factors are saved with the front panel setup 3 38 Channel Menu 3 40 ECL Key TTL Key more Key HP 8990A The ECL key sets the Peak Power Analyzer to levels optimized for ECL circuits a V Div 200 mV div a offset 1 3 V m coupling de s Trigger level 1 3 V m Trigger slope no change RECALL 0 returns the menu to the previous settings The TTL key sets the Peak Power Analyzer to levels that are optimized for TTL circuits s V Div 1 V div a offset 2 5 V m coupling dc w
85. dow and the trigger signal in the other window Push the menu key to display the Timebase menu Turn the knob to change the timebase and note that the horizontal axis and waveforms are scaled accordingly or 6 Change the timebase so that you display at least one complete pulse segment 7 Make an automatic peak power measurement of the waveform on channel 1 a Press the blue shift key b Select 7 PEAK on the keypad c Enter 1 when C appears at the bottom of the display HP 8990A 8 10 11 12 13 Installation and Operator s Maintenance d The measurement result is shown at the bottom of the display The reading should be 10 mW Make an automatic average power measurement of channel 1 a Press the blue shift key b Select 8 AVG on the keypad c Enter 1 when C appears at the bottom of the display d The measurement result is shown at the bottom of the display The reading should be 5 mW Select the key change the check source from pulse to CW The displayed waveform and the measurements at the bottom of the display will update accordingly The peak power measurement should still read 10 mW The average power measurement should now be 9 91 mW Disconnect the channel 3 trigger input Under the Trigger menu change the trigger source from channel 3 to channel 1 This tests the internal trigger mode of the instrument T
86. e display on the Peak Power Analyzer appears to have three pulses This is an unstable trigger condition The following steps explain this condition and how to overcome it m Press the holdoff softkey w Set holdoff to 1 02000 ms using either of the entry devices HP 8990A Ap runing 2 50000 us Trigger Menu Holdoff on the Peak Power Analyzer has a minimum setting of 40 ns The input signal to the Peak Power Analyzer has two 500 ns pulses On the first rising edge a trigger occurs and activates the 40 ns holdoff When the holdoff time has elapsed the Peak Power Analyzer triggers on the next rising edge The Peak Power Analyzer times a 40 ns holdoff and looks for another trigger The Peak Power Analyzer will trigger on the first rising edge of the second pulse Each trigger event occurs on a different pulse and consequently an unstable condition EDGE TRIGGER pete tina at fm on ts nasi serivtin cromenenenenson trig s i guy pattern state deley source 1 a3 4 reve se a athe 8 G0000 2 56000 us 580 ns fdiv holdoff Line SEAD ss fine Figure 3 16 Two Burst Pulse w Stable Trigger By adjusting the holdoff to wait until the rising edge of the second pulse passes the Analyzer triggers only on the first rising edge and the signal is stable In this case the trigger becomes stable at approximately 1 02 ms holdoff 3 49 Trigger Menu HP 8990A Pattern Trigger
87. e operation outside of the environmental specifications for the product or improper site preparation or maintenance NO OTHER WARRANTY IS EXPRESSED OR IMPLIED HEWLETT PACKARD SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE EXCLUSIVE REMEDIES THE REMEDIES PROVIDED HEREIN ARE 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 iin nn ccc ccc Assistance Product maintenance agreements and other customer assistance agreements are available for Hewlett Packard products For any assistance contact your nearest Hewlett Packard Sales and Service Office Addresses are provided on the following page Hewlett Packard Sales and Service Offices US FIELD OPERATIONS Headquarters California Northern California Southern Hewlett Packard Co Hewlett Packard Co Hewlett Packard Co 19320 Pruneridge Avenue 301 E Evelyn 1421 South Manhattan Ave Cupertino CA 95014 Mountain View CA 94041 Fullerton CA 92631 800 752 0900 415 694 2000 714 999 6700 Colorado Atlanta Annex THinois Hewlett Packard Co Hewlett Packard Co Hewlett Packard Co 24 Inverness Place East 2124 Barrett Park Drive 5201 Toliview Drive Englewood CO 80112 Kennesaw GA 30144 Rolling Meadows IL 60008 303 649 5512 404 648 0000 708 255 9800 New Jerse
88. e intensity of the display Calibrator Switch This switch controls whether or not the calibration factors in non volatile RAM will be over written In the PROTECTED position the vertical calibration and delay calibration factors won t be over written In the UNPROTECTED position the calibration factors will be over written Refer to the instr cal menu section of the Utility Menu for additional information Hewlett Packard Interface Bus HP IB Connection to a computer for remote operation is made at this point HP 8990A 10 l1 12 13 Local Operation AC Cal Output This output is a 1 5 kHz square wave used for probe calibration and internal frequency and delay adjustments The signal is phased locked to the front panel sensor check source DC Cal Output This output is a DC signal used for vertical calibration Trigger Channel 1 Output This output is a TTL level signal corresponding to the unprocessed edge trigger signal of channel 1 When the Peak Power Analyzer performs a sensor chopping this signal is turned off momentarily The chopping may be performed as often as once every three seconds at maximum sensitivity Trigger Channel 4 Output This output is a TTL level signal corresponding to the unprocessed edge trigger signal of channel 4 When the Peak Power Analyzer performs a sensor chopping this signal is turned off momentarily The chopping may be performed as often as once ev
89. e timebase of the windowed waveform can be varied from the same as the normal timebase to 1 20 of the normal timebase This equates to 1 2 of a major division When the reference position is set to left only the right window marker moves when the window timebase is changed When the reference is set to right only the left marker moves and when center is selected both markers move This maintains a specified time reference without changing any timebase settings When the window function is enabled two selections are available for placing and sizing the window a Window timebase a Window position 3 28 HP 8990A timebase Key position Key Window example Timebase Menu This key is activated only when the window function is turned on It enables the setting of the window timebase As the window timebase is increased the time in the window displayed at the bottom of the screen is increased and the markers in the top screen begin to move farther apart When the window reaches full screen the main timebase and the window timebase become equal At this point turning the knob anymore has no affect As the window timebase is decreased the markers in the top screen move closer together This key is activated only when the window function is turned on The window can be placed anywhere on the normal waveform By adjusting the window position you can see any part of the waveform The following example uses the Sensor
90. ebase width in the window is 50 ys division with the trigger point at center reference and zero time delay The knob performs the following actions when a field is active highlighted m time division field top the knob changes both timebases The displayed waveforms change until the window timebase equals the normal timebase 3 31 Timebase Menu HP 8990A x delay the knob moves the window and waveform sideways while maintaining the same size This allows viewing of the same section of the waveform at a different point in time The two timebases will not change window timebase the knob changes only the window timebase The range is from 1 20 of the normal timebase to equal to the normal timebase window position as you turn the knob the window changes position on the normal waveform allowing you to view different sections of the waveform 3 32 Channel Menu Introduction to The channel menu controls the vertical operation of hannel the Peak Power Analyzer This chapter describes the Channels use of the four channels including vertical scaling and bandwidth selection for channels 1 and 4 and vertical sensitivity offset coupling attenuation and preset levels for channels 2 and 3 3 33 Channel Menu HP 8990A Channe MENU Channe 1 amp 4 off an e Lag Mode Ont Channel 2 amp 3 off on j ref level offset lt a lt bandwidth BW lim a E Hi a p externa
91. ed or adhered to could result in damage to or destruction of part or all of the product Do not proceed beyond a CAUTION sign until the indicated conditions are fully understood and met Contents SIRS AP AEDES IE A MIR RIE PE PTI TES EA PPI ES I OR TT 1 General Information Tntroduction yp Chm wees Specifications de ee eg Safety Considerations Instruments Covered By This Manwa Manual Change Package Description semi ae Se Ss Options aaa Electrical Options Single Sensor Input Option 001 Rear Panel Sensor Inputs Option O02 a ter we Ae Se Miscellaneous Options Service Manual Option 915 Additional User Documentation Option 916 Additional Programming Manala or Getting Started Guide Accessories Supplied Accessories Available a Electrical we at ee Oe 30 dB E ye ra APC 3 5 mm Adapter 2 4 mm Adapter Mechanical Rack Mount Apsentbls Recommended Test Equipment 1 1 1 1 1 2 1 2 1 4 1 4 1 5 1 6 1 6 1 6 1 6 i 6 1 6 1 7 1 7 1 7 Contents 1 Contents 2 Installation and Operator s Maintenance Introduction o ty see aay eet Sok vale Ss Sd Initial Inspection 2 Power Requirements Line Voltage and Fuse Selection Selecting the Line Voltage Checking for the Correct Fuse Power Cables 2 Interconnections Hewlett Packard Interface Bus Peak Power Sensor Mating Connec
92. ee figure 3 28 3 71 Trigger Menu HP 8990A Ap running DELAY TRIGGER r e listen H edge pattern 1 state MIEP i qualify on pattern state 1 a3 4 delay time A as e srvsvanssnanmesane s euvensyeencqeunianespiaeld esteIaste pid etatiyteteqenarnririnmeiebiemmearoresmsinessionse aera i 2 50000 us 0 00000 2 50000 us Soo ns diyv 2 500 ws trigger on count of f f 2 fine Figure 3 28 Ten Burst Pulse Triggered on Pulse 5 a Change the trigger on count to 9 see figure 3 29 4p running DELAY TRIGGER api eee ae Ras aie ee Ah auto edge pattern state HAEL quefify on pattern State O a DOESER Mae EE SE AO DE A EE EE ETA EAR E t S FOE E pA aa eongeindinndunegynatos bae fr wSngnnas eagoer met sisting r EN cL 1 4 3 4 i delay time EN ET W A E TTEN mee 500 ns div trigger on count of fof 2 fine Figure 3 29 Ten Burst Pulse Triggered on Pulse 9 3 72 HP 8990A Trigger Menu By setting the Peak Power Analyzer to the delay trigger mode a specific time or count to delay between qualification and trigger can be added In this exercise the trigger was delayed to get a stable display When the time delay had elapsed the Peak Power Analyzer began counting rising edges until it found the edge set 3 73 3 74 This Page intentionally Left Blank Display Menu introduction to the The Display menu controls most of the featu
93. efine Measure Menu Introduction to Measurements Measurement Selection meas meas def meas limit Key Measure Sub menu continuous Key statistics Key 3 Measure Define Sub menu standard user defined Key thresholds measurements Key Measure Limit Sub menu test Key 2 set Key fal if gt Key orif lt Key a a a a save to Key after fail Key aa 3 101 3 102 3 102 3 102 3 103 3 103 3 103 3 103 3 103 3 104 3 104 3 104 3 104 3 104 3 107 3 109 3 110 ill 3 111 3 111 3 111 3 111 3 112 3 114 3 114 3 114 3 115 3 115 3 115 3 115 Contenis 7 Contents 8 Utility Menu Introduction to the Utilities 2 0 HP IB Menu a a ae talk only mode addressed mode EOI Key ee 4 ws ee Soe me 4 a ik form feed Key 2 paper length Key exit menu Key clicker Key check source Key 2 show statusmenu update Key by ke Seow ay more Key 2 4 4 6 4 be 4 selftest menu ram Test Ga Seeks Ko rom Test PS a hk Ge Bean acquisition Test miscellaneous Tests 2 loop Test ls ho tk ta start test Key ie can 2 test all Key oa ee cee ee WO WR Re exit menu Key Order of Calibrations Bhat cal stor 26 oe Calibrating to meet Specified Accuracy The Peak Power Analyzer has been Serviced 2 2 we Probe Cal nao auaa aaa Time
94. el 3 102 when 3 51 3 59 Window Key 3 28 Key down power up 3 4 Keypad 3 16 3 27 Index 7 index 8 Knob 3 17 3 27 Level trigger 3 43 Level Key 3 45 Limit Test 3 114 Linear Mode 3 78 Line Module 3 22 Line Switch 3 22 Line Voltage 2 2 Line voltage selection 2 3 Local Key 3 10 Logic Trigger Delay Calibration 3 137 Log Mode 3 36 3 78 loop Test 3 126 Mains Voltage 2 2 Maintenance operator s 2 20 Making Measurements 3 107 A 2 Manual Measurements 3 83 Manual Update Package 1 4 marker 1 3 85 marker 2 3 85 Marker Menu 3 83 Markers 3 102 amplitude 3 85 time 3 86 Mathematical Function 3 91 meas meas def meas limit Key 3 110 Measure Define 3 111 Measure Limit 3 114 Measurements 3 107 clearing 3 110 Measurement Selection 3 109 Measurement Setup A 1 Measure Sub menu 3 111 Mechanical Accessories 1 6 Memory pixel 3 102 waveform 3 102 Menu Carrier Frequency Menu 3 89 channel 3 33 Define Measure 3 107 Display 3 75 Marker 3 83 Timebase 3 25 Trigger 3 41 Utility 3 117 Waveform Math 3 91 Waveform Memory 3 101 Menus 3 19 More Key 3 39 Mounting rack 2 16 Narrow Pulse 3 26 nonvolatile Key 3 102 Nonvolatile Memory 3 102 Normal Display Mode 3 76 Number of screens Key 3 78 Numeric Keypad 3 16 offset Key 3 39 3 95 Operating Environment 2 16 Operating Manual 1 1 Operation bench 2 16 Operator Key 3 94 Operator s Checks 2 10 Operator s ma
95. erages is set with either entry device Displayed signal noise is significantly reduced using the averaging mode As the number of averages is increased from 1 to 2048 the display becomes less responsive to changes in the input signal s However using more averages reduces the effects of displayed signal noise and improves resolution Envelope mode needs no other parameters set The display reflects the minimum and maximum amplitude in each horizontal position This is useful in viewing jitter in time or amplitude 3 77 Display Menu HP 8990A power display Key This function allows the user to toggle between linear and log power display modes Linear mode is the default power up mode Changing modes does not cause the display to be cleared PA e no of screens Key The next function key chooses the number of screens to view m 1 the entire display area is one screen and any displayed waveforms are superimposed on top of each other m 2 the display area is divided into two screens Channels 1 and 2 will be displayed in the top screen and channels 3 and 4 will be displayed in the bottom screen See figure 3 31 m 4 the display is divided into four equal screens with one waveform displayed in each screen See figure 3 32 Note If the display has more windows than are desired it may be that additional windows have been enabled with the Timebase Menu or the Wform Math Menu Select these menus to turn off the undes
96. ery three seconds at maximum sensitivity 3 23 3 24 This Page Intentionally Left Blank Timebase Menu Introduction to the Timebase This chapter contains a complete description of how the Timebase menu works and controls the entire horizontal display and it s parameters Each function key is described in detail TIMEBASE Figure 3 9 Timebase Menu 3 25 Timebase Menu HP 8990A A rn tt CL A A ON AAA tt Time Div Key The time division function controls the sweep speed on the horizontal axis from 2 ns div to 5 sec div The horizontal axis is ten divisions wide The main timebase is incremented and decremented in a 1 2 5 sequence The FINE Key has no affect on the timebase settings Note To display the on or off time of a narrow pulse the pulse width should not be less than the time per division divided by ten During slow sweep speeds 200 ms div to 5 sec div the acquisition and write cycle changes At these sweep speeds the Peak Power Analyzer needs up to 2 5 seconds to generate a trigger and acquisition Therefore the displayed data is updated for each data sample Scroll trigger mode is available with slow sweep speeds The Peak Power Analyzer offers one of two scroll trigger modes for acquisition and display m auto triggered scroll is used in auto trigger The Peak Power Analyzer acquires and displays data in the auto triggered scroll mode Each data sample is displayed as it is
97. ety Considerations 1 2 Save Key 3 14 save to Key 3 115 Screens 3 78 Scroll Trigger Mode 3 26 Selftest 3 123 selftest menu 3 123 sensitivity Key 3 95 Sensor Check Source 3 18 adapters 1 6 sensor zero Key 3 37 Serial Number 1 4 Service Manual 1 1 service menu 3 136 set Key 3 114 Setup Autoscale Key 3 12 index 11 Index 12 Recall Key 3 14 Save Key 3 14 Show Key 3 14 Shipment 2 17 Show Key 3 14 show status Key 3 122 Signal Noise 3 77 Single Key 3 10 Single Sensor Input Option 3 41 3 93 3 103 3 109 slope Key 3 45 Slow Sweep Speeds 3 26 Softkeys 3 18 source Key 3 45 3 103 Specifications 1 2 1 8 14 supplemental 1 2 warranted 1 2 Standard Measurements 3 111 standard user defined Key 3 111 start cal Key 3 130 3 134 start marker 3 86 start test Key 3 126 State Trigger 3 4 State Trigger Exercise 3 60 State Trigger Mode 3 58 statistics Key 3 111 stop marker 3 86 Storage 2 17 store Key 3 103 Submenu attenuation 3 129 time null 3 131 Supply Voltage 2 2 Sweep Speed 3 26 Switch calibrator 3 22 System Control 3 8 Clear Display Key 3 10 Hardcopy Key 3 10 Local Key 3 10 Run Stop Key 3 9 Single Key 3 10 Tagging for Service 2 17 Talk Only 3 119 3 120 Test loop 3 126 Test Equipment 1 7 test Key 3 114 thresholds measurements Key 3 112 Timebase Menu 3 25 delay Key 3 27 reference Key 3 27 Time Div Key 3 26 Window Key 3 28 3 29 Timebase Window 3 93
98. exit the program Figure 4 4 Peak Power Sensor Cable Electrical Connector 4 20 HP 8990A Performance Tests THINKJET PRINTER DIGITAL MULTIMETER SWITCH DRIVER HP 899 A PEAK POWER ANALYZER UNIVERSAL SOURCE STEP ATTENUATOR CONNECT BNC TEE DIRECTLY TO CH3 BNC TEE Figure 4 5a Signal Level Measurement 4 21 Performance Tests HP 8990A THINKJET PRINTER DIGITAL MULTIMETER SWITCH DRIVER HP 899A PEAK POWER ANAL UNIVERSAL SOURCE STEP ATTENUATOR 5 0 CONNECT BNC TEE Figure 4 5b Signal Level Verification 4 22 HP 8990A Performance Tests THINKJET PRINTER SWITCH DRIVER HP 899A PEAK POWER ANALYZER STEP ATTENUATOR ADAPTER 5aQ TERMINATION CONNECT BNC TEE DIRECTLY TO CHS Figure 4 5c Measurement System Error Correction 4 23 Performance Tests HP 8990A Checking Sensor Check Source Power Level Specification Electrical Performance Conditions Characteristics Limits 10 dBm 405 48 Description Since it is basically independent of other instrument circuits the output level of the Sensor Check Source is checked with the Peak Power Analyzer and peak power sensor Both the CW and pulse power levels are checked PEAK POWER ANALYZER Figure 4 6 Checking Sensor Check Source Equipment Setup Equipment Peak Power Sensor HP 84812A 848134 84814A or 84815A
99. extensions loaded Name Description GRAPH Graphics GRAPHX Graphics Extensions IO 1 0 TRANS Transfer MAT Matrix Statements PDEV Program Development XREF Cross Reference KBD Keyboard Extensions CLOCK Clock MS Mass Storage SRM Shared Resource Management ERR Error Messages DISC Small Disc Driver CS80 CS80 Disc Driver HPIB HPIB Interface Driver CRIB Bit mapped CRT Driver CRTA Alpha CRT Driver COMPLEX Complex Arithmetic CRTX CRT Extensions EDIT List and Edit HFS Hierarchical File System Multimeter 4 isakaGakeiees HP 3458A Universal Source HP 3245A Switch Driver HP 11713A Attenuator 0 70 dB HP 8495G Attenuator 20 dB HP 8491A Option 020 50 Ohm Termination HP 1250 0207 Adapter SMC to BNC HP 1250 0331 Peak Power Sensor Cable HP 84812 60008 Conttolletin c p60 niies HP 9000 Series 200 300 Thinkjet Printer HP 2225A HP 8990A Installing the Software Running the Software Caution Performance Tesis The software needed to perform this test is iocated in the calibration guide kit Using a Floppy Disc Drive Make a backup copy of the supplied disks Make sure that your working disk is write enabled Using a Shared Resource Management SRM or Hierarchical File System HFS Hard Disc Create a directory that will contain the program and its associated files Copy all of the files on the 3 5 inch disk to this directory This software use
100. f connector requires a 502 BNC male mating connector that is compatible with the specifications of US MIL C 39012 2 7 installation and Operator s Maintenance HP 8990A Type N Connector This type of connector requires a 500 type N male mating connector that is compatible with the specifications of US MIL C 39012 Peak Power Sensor Input This is a special connector that is only compatible with the Hewlett Packard series of peak power sensors Turn on Instructions 2 8 Warning Note Turn On Procedure Before the instrument is switched on all protective earth terminais extension cords autotransformers and devices connected to it should be connected to a protective earth grounded socket Any interruption of the protective earth grounding will cause a potential shock hazard that could result in personal injury Oniy 250V siow blow fuses with the required rated current should be used Do not use repaired fuses or short circuited fuseholders To do so could cause a shock or fire hazard Before turning the Peak Power Analyzer on be sure that the Calibrator switch on the rear panel is in the PROTECTED position If the Peak Power Analyzer is already plugged in press the LINE switch to ON 1 The LINE switch is located on the rear of the Peak Power Analyzer HP 8990A Note Power up Sequence installation and Operator s Maintenance If the power cable is not plugged in follow these instruct
101. f the Peak Power Analyzer is determined to be at fault refer to the Peak Power Analyzer Service Manual If necessary results of this procedure can be recorded in the Performance Test Record at the end of this chapter HP 8990A Performance Tests Checking Instrumentation Uncertainty Specification Electrical Characteristics 5 5 0 074W signal power x 100 Description Note Controllers Performance Conditions Limits Includes Noise and Offset Instrumentation Uncertainty is comprised of several errors vertical calibration uncertainty quantization error delta temperature drift and distortion error This performance test is intended to verify that your Peak Power Analyzer meets the specified instrumentation measurement uncertainty This test verifies only this specification All other specifications must be verified using the other tests outlined in this chapter This software package does NOT verify that the Peak Power Analyzer is fully calibrated It only verifies the instrumentation measurement uncertainty of the Peak Power Analyzer Refer to the instr cal menu section of the Utility Menu for complete calibration procedures Any HP Model 9000 series 200 300 computer At least 4 megabytes of RAM HP IB interface A 3 5 inch dual sided floppy drive unit 4 17 Performance Tests 4 18 Operating System Equipment HP 8990A HP BASIC 5 1 with the following language
102. for estimating capability Warranted specifications are guaranteed after the Peak Power Analyzer has had a one hour warm up period Sensor Inputs Channels 1 amp 4 FREQUENCY RANGE 0 5 to 18 GHz With sensor HP 84812A 0 5 to 26 5 GHz With sensor HP 84813A 0 5 to 40 GHz With sensor HP 84814A 0 05 to 18 GHz With sensor HP 84815A POWER MEASUREMENT RANGE 32 to 20 dBm RISETIME FALLTIME 10 90 90 10 Input Signal Risetime Falltime Video Bandwidth Typical 0 to 20 dBm lt 5 ns 150 MHz 16 to 0 dBm lt 6 ns 150 MHz 26 to 16 dBm lt 1 ps 500 kHz 32 to 26 dBm lt 80 ps 8 kHz 40 to 32 dBm lt 250 ps Typical 2 5 kHz 1 Usable down to 40 dBm 2 With the Channel Menu bandwidth key set to HIGH 3 With a displayed signal height gt 2 divisions 4 The optional 20 foot long peak power sensor cable degrades the specified risetime to 10 ns Specification for the HP 84815A is lt 45 ns 5 Single shot bandwidth is limited to 1 MHz Single shot bandwidth is based on 10 points per pulse In single shot mode the 10 MHz sampling rate limits minimum risetime to 100 ns given a time base setting of lt 5 us division HP 8990A General information Table 1 1 Specifications continued Sensor Inputs Channels 1 amp 4 continued PULSE REPETITION RATE MAXIMUM 100 MHz Externally Triggered 1 MHz Internally triggered MINIMUM PULSE WIDTH 10 ns LOG VERTICAL SCALE 1 2 5 dB division LINEA
103. h the Peak Power Analyzer and the channel 2 or 3 input during the delay calibration When all of the setup requirements are satisfied press the continue key and the actual calibration process begins 3 135 Utility Menu abort Key exit menu Key if Calibration Fails 3 136 HP 8990A This is the only active front panel key during the calibration process Pressing this key terminates the calibration process leaving the previous calibration factors intact Once the abort key is pressed the calibration may continue for a few moments before it finally aborts This key returns to the Utility menu If vertical cal fails verify the following a Is the setup correct a For channels 1 and 4 was the peak power sensor disconnected from the Peak Power Analyzer or is the signal at the peak power sensor at most 60 dBm a For channels 2 and 3 was the connection made to the rear panel DC CAL connector If the items mentioned have been checked out refer to the Peak Power Analyzer Service Manual If delay cal fails verify the following z Was vertical cal done recently a Was the BNC cable HP 10503A supplied with the Peak Power Analyzer used for the calibration m Was the BNC cable connected to the rear panel AC CAL connector If the items mentioned have been checked out refer to the Peak Power Analyzer Service Manual HP 8990A Utility Menu a te service menu Default Cal Note Logic Trigger Delay
104. hannel or any waveform memory that has a waveform stored Ensure that the source is turned on If the operator is only it is the only operand that can be selected This key selects any of the five operations Continue pressing the function key until the operation desired is highlighted u plus The two selected operands are added together in this function Addition is calculated on a point by point basis m minus The minus operation subtracts the second operand from the first m divide The first operand is divided by the second When the divisor is very small or zero the function may be clipped or not displayed Depending on the available resolution changing the sensitivity or the offset may not improve the display m vs versus The versus function draws an amplitude versus amplitude display of the two selected operands Versus cannot be stored in a waveform memory because measurements cannot be made on the resultant waveform however it can be stored in pixel memory only The only function displays the first operand adds an offset and scales it HP 8990A chan men Key sensitivity Key offset Key Note Waveform Math Menu This key selects the second operand or the waveform that is manipulated against the first operand The source choices are any of the displayed channels or any of the memories This key is not available if the operator is only The vertical sensitivity of the functio
105. hat average power is continuously measured a Press DEFINE MEAS b Turn continuous on using the second function key The Analyzer display will read ava 1 gt 8 where XXX is the current average power measured The value of average power is not relevant at this point HP 8990A Note Performance Tests To verify internal triggering down to 0 25 of full scale l Slowly decrease the power level of the signal generator to approximately 19 dBm or about 12 uW as measured by the Analyzer Before continuing with this procedure wait about one minute for the display to respond to the change in power level since digital averaging is being used Adjust the Analyzer scale so that the signal displays full scale over 8 divisions vertically a Press CHAN VERT b Change the scale with the third function key and the numeric keyboard Press the key and lower the trigger level so that a stable signal is displayed The trigger level is represented by the horizontal broken line Continue to lower the trigger level horizontal broken line down to two divisions above the baseline The display should be stable at this trigger level To verify triggering for a 30 dBm signal 1 2 Slowly decrease the power level by several dB Adjust the scale so that the signal displays full scale Adjust the trigger level to achieve a stable display Continue to decrease the power and adjust the scale
106. he Analyzer display to 1 screen with connect dots on and grid selected a Press the DISPLAY menu key b Select 1 with the of screens function key c Turn connect dots on d Highlight select grid 4 Select 128 digital averages a Press DISPLAY b Select avg with the first function key 4 12 HP 8990A Performance Tests c Change the of avg to 128 using the second function key and the knob Table 4 2 Average Power Versus Measured Power Average Recommended Number of Analyzer Power Level Sensor a Measured Power 32 00 dBm HP 8485D 586 to 674 nW 20 00 dBm HP 8485A 9 3 to 10 7 pW 0 00 dBm HP 8485A 0 93 to 1 07 mW 10 00 dBm HP 8485A 9 3 to 10 7 mW 20 00 dBm HP 8485A 93 to 107 mW To calibrate power 1 Connect the average power sensor HP 8485D or equivalent to the average power meter and signal generator RF output as shown in Figure 4 3 2 Adjust the RF output power level of the signal generator until the power meter reads 32 68 dBm as listed under Average Power Level in Table 4 2 3 Disconnect the average power sensor from the signal generator and connect the peak power sensor to it Refer to Figure 4 3 4 Connect the peak power sensor to CH 1 of the Analyzer 5 Set the timebase to 5 ms div a Press the TIMEBASE key b Press the first function key and enter 5 ms div using the knob 6 Set the vertical scale to 200 nW div a Press the
107. he check source to pulse mode highlight pulse Autoscale the Peak Power Analyzer by pressing AUTOSCALE J Make a pulse top measurement a Press the BLUE key and then the TOP key b Press 1 when C appears at the bottom of the display The average power displayed should be between 8 9 mW and 11 2 mW 10 dBm 0 5 dB If either part of the test fails and all RF channel and sensor performance tests have passed refer to the Peak Power Analyzer Service Manual If necessary results of this procedure may be recorded in the Performance Test Record at the end of this chapter HP 8990A Performance Tests Checking Bandwidth Specification Electrical Performance Conditions Characteristics Limits Bandwidth de to 100 MHz Repetitive de to 1 MHz Single shot Description This test measures the bandwidth of channels 2 and 3 at the 3 dB point The bandwidth limits are verified by inputting a signal of known frequency and power to the Peak Power Analyzer and to an average power meter system PEAK POWER ANALYZER POWER METER SIGNAL GENERATOR BNC POWER TEE SENSOR Figure 4 7 Checking Bandwidth Equipment Setup Equipment Signal Generator HP 8657B Power Meter 6 HP 437B Power Sensor 5 HP 8482A 4 27 Performance Tests 4 28 Procedure HP 8990A To set up the test equipment and Peak Power Analyzer 2 Press and then on the Pe
108. he display should not change and the measured values should be 10 mW Disconnect the peak power sensor from channel 1 and connect it to channel 4 Connect the AC CAL OUTPUT to Channel 2 Now channel 4 replaces channel 1 as the RF input for the Sensor Check Source signal Channel 2 replaces channel 3 as the external trigger input 2 13 installation and Operator s Maintenance HP 8990A 14 Repeat steps 1 through 11 in order to verify functionality of channels 2 and 4 When repeating the procedure be sure to replace any mention of channel 1 with channel 4 and channel 3 with channel 2 15 If any of the steps of this procedure fail refer to the Utility Menu section of this manual Perform the vertical calibration procedure under the instr cal menu When the calibration is complete repeat the checks If any of the steps fail again refer to the Peak Power Analyzer Service Manual nn i HP IB Address The HP IB address of the Peak Power Analyzer is i set using the Utility UTIL menu The Peak Power Selection Analyzer can be placed in Talk Only Mode or Addressed Mode The following procedure describes how to set the HP IB address while in Addressed Mode Note A list of allowable addresses is given in Table 2 2 mm Press the key on the front panel Press the HP IB menu softkey bo i talk only Press the addressed softkey until addressed is highlighted 4 Change the address with the kn
109. hree measurements must be selected from the keypad The limit test will be run on front panel measurements This toggle switch turns the test routine on or off When the test is turned on the Peak Power Analyzer runs in the test mode on the most current measurements that have been selected This key selects the measurement There are thirteen measurements available these are the same measurements that are available on the numeric keypad m Press the function key to highlight the field and rotate the knob to select the desired measurement HP 8990A fail if gt Key or if lt Key save to Key after fail Key Define Measure Menu This field sets the upper failure threshold The range on this field is dependent upon the units of the desired measurement This key sets the lower threshold of the failure parameters The data associated with the failure can be saved to memories or to a hardcopy device The channel that is saved is selected in the Waveform Memory menu m In the case of saving to nonvolatile memory one memory may be selected If multiple failures occur only the last failure data will be saved because the most current data will overwrite the memory contents If the data is saved to pixel memory an accumulated save occurs No measurements may be made on the pixel data a A save to a printer immediately sends the data to the peripheral device The save to key can be turned off and n
110. ifications are listed in Table 1 1 Warranted specifications are the performance standards or limits against which the instrument may be tested Supplemental characteristics are not warranted specifications but are typical characteristics included as additional information for the user This product is a Safety Class I instrument meaning one that is provided with a protective earth terminal The Peak Power Analyzer and all related documentation should be reviewed for familiarization with safety markings and instructions before operation Refer to the Safety considerations page found at the beginning of this manual for a summary of the safety information Safety information for installation operation and performance testing is found in appropriate places throughout this manual HP 8990A General Information 0000000 5 2 BNC Coaxial Cable HP 10503A Power Cable Refer to Figure 2 3 for Part Numbers Figure 1 1 HP 8990A Peak Power Analyzer with Accessories Supplied 1 3 General Information instruments Covered By This Manual Manual Change Package Description HP 8990A Attached to the rear panel of the instrument is a serial number identification label The serial number is in the form 0000A00000 The first four digits and the letter are the serial number prefix The last five digits are the suffix The prefix is the same for identical instruments it changes only when a configuration change is made to the inst
111. imited oscilloscope capabilities Instrument configurations can be stored and recalled Electrical Options Single Sensor Input Option 001 Sensor input channel four is deleted Rear Panel Sensor Inputs Option 002 Sensor inputs channels one and four are deleted from the front panel and placed on the rear panel Miscellaneous Options Service Manual Option 915 Option 915 is used to add the Service Manual to the initial order for the Peak Power Analyzer However if the manual was not ordered initially it may be ordered separately by calling Hewlett Packard s Direct Marketing Division at 1 800 538 8787 in the United States and Canada In Europe the Service Manual may be obtained by calling your nearest Hewlett Packard office The part number of the manual is HP 08990 90004 Additional User Documentation Option 916 Option 916 is used to add an additional Operating and Programming Manual to the initial order for the Peak Power Analyzer Included with the Operating Manual is the Getting Started Guide and a disk which is used for the Instrumentation Uncertainty Performance Test However additional manuals may be ordered by calling Hewlett Packard s Direct Marketing Division at 1 800 538 8787 in the United States and Canada In Europe the manuals may be obtained by calling your nearest Hewlett Packard office The part number of the Operating Manual including Getting Started Guide and disk is HP 08990 60037 Refer to
112. imum persistence in normal mode Connect the dots does not interpolate data and generate data points The Peak Power Analyzer connects data points linearly HP 8990A p runing DISPLAY ae AGEN avg eny F pace fade ak ir Seer tae mas as eee i Ta e e ATT 7 persistence OE wE i me power display i oo ta of screens f 2 a Uf ort tL axes grid e connect dots os mm 0 00000 s 200 us dit 1 00000 8 Figure 3 33 Connect the Dots Display Menu 3 81 3 82 This Page Intentionally Left Blank Markers Menu Introduction to This chapter describes how to use the markers and make Markers manual measurements on displayed waveforms In this menu two sets of markers are controlled These markers are the amplitude markers power and voltage horizontal line markers and the time markers vertical line markers When the desired set of markers have been turned on the two marker fields are turned on The markers are controlled individually 3 83 Markers Menu HP 8999A Markers MENU marker 2 marker 1 start merker stop marker ompi time Figure 3 34 Markers Menu 3 84 HP 8990A Markers Menu REESE eee ampl markers This function key toggles the markers on and off With the amplitude marker function turned on the next two fields are activated the two markers are controlled individually When the amplitude markers are turned on marker 2 marker 1 and delt
113. intenance 2 20 Option single sensor input 3 41 3 93 3 103 3 109 Option 002 3 21 Options documentation 1 5 electrical 1 5 miscellaneous 1 5 Order of Calibrations 3 127 Index 9 Index 10 or if Key 3 115 Overshoot A 6 Packaging tagging for service 2 17 Packaging materials original 2 17 other than original 2 18 paper length Key 3 121 Pattern Key 3 51 Pattern Trigger 3 41 range 3 52 when entered 3 51 when exited 3 52 when Key 3 51 when present 3 52 Pattern Trigger Exercise 3 53 Pattern Trigger Mode 3 50 Persistence 3 76 3 80 Pixel Memory 3 102 3 103 add to 3 104 pixel Menu 3 103 position Key 3 29 Power Cable 2 5 power display Key 3 78 Power Requirements 2 2 Power up Sequence 3 2 present Key 3 60 Preset 3 4 3 102 PRF A 6 PRI A 6 Probe Attenuation 3 39 Probe Attenuation Failure 3 129 probe cal Menu 3 128 Probe Key 3 38 3 39 Programming Manual 1 1 Pulse Offtime A 5 Pulse Repetition Frequency A 6 Pulse Repetition Interval A 6 Pulse width A 5 Qualify edge 3 66 pattern 3 66 state 3 66 Qualify on Key 3 65 Rack Mounting 2 16 ram Test 3 125 Rear Panel Connector 3 21 Rear Panel Sensor Input 3 21 Recall Key 3 14 Recommended Test Equipment 1 7 reference Key 3 27 Reference Key 3 27 reference level Key 3 36 Reference Point 3 27 Reset 3 4 Risetime A 6 Risetime measurements A 1 rom Test 3 125 Run Stop Key 3 9 Safety 1 2 Saf
114. inuous is off the measurement is made once and the amplitude and time markers are placed on the waveform showing where the measurement was made The continuous function must be on before the statistics key is available When continuous is on statistics will display the min value marx value average value and current value of up to three measurements Measure Define Sub menu standard user defined Key The Measure Define sub menu selects measurement standards assigned by the user This function gives the option of making measurements based on signal width delay settings or threshold parameters If standard is selected no other choices are available and the Peak Power Analyzer will make measurements based on the IEEE standards for the particular measurement If however user defined is selected two sets of test conditions are available to define the measurements 3 111 Define Measure Menu thresholds measurements Key 3 112 Note Note HP 8990A This key sets the vertical test conditions percentage ratios independent of the horizontal test conditions edge slope and count Both sets of test conditions must be set to define the measurement The thresholds submenu sets the vertical test conditions of percentage ratio from 25 to 125 The upper and lower thresholds must be set to levels that will fall on the displayed waveform If either threshold is not on the waveform the measurement resul
115. ion are used and accurate timing measurements are required 2 Equal to video bandwidth when lt 1 MHz Some vertical sensitivities may require lower bandwidth settings 3 External triggering bandwidth is equal to ac coupling bandwidth or bandwidth limit when chosen on the Channel Menu General information HP 8990A Tabie 1 1 Specifications continued Sensor Check Source POWER LEVEL 10 dBm 0 5 dB FREQUENCY 1 05 GHz nominal SIGNAL TYPE Square wave modulated CW selectable REPETITION RATE 1 5 kHz CONNECTOR Type N female SWR REFLECTION COEFFICIENT 1 85 0 15 at 1 05 GHz Additional Characteristics MAXIMUM SAMPLE RATE 10 million samples per second for time base setting of lt 5 ps division VERTICAL RESOLUTION 0 4 8 bit A D MEMORY DEPTH 7 501 points display 1024 points Over HP IB Remote Operation HP IB IEEE COMPATIBILITY CODE STD 488 2 1988 SH1 AH1 T5 L4 SR1 RL1 PP1 DCI DT1 C0 and E2 DATA ACQUISITION AND TRANSFER RATE A 500 point data record can be acquired and transferred to a computer at a rate of approximately 10 times per second as tested with an HP 9000 Series 200 Controller DATA TRANSFER RATES Approximately 120 kbytes second 1 Specified for a temperature range of 10 C to 40 C 2 For single shot over HP IB maximum memory depth is 501 points For lt 5 ns division time base range memory depth is 200 points 3 The Hewlett Packard Interface Bus HP IB is He
116. ions On the rear panel i Check the line voltage module for correct voltage selection 2 Check that the fuse rating is appropriate for the line voltage being used see figure 2 2 Fuse ratings are printed on the rear panel 3 Plug in the power cable 4 On the rear panel press the LINE switch to ON 1 The Peak Power Analyzer turns on to the same control settings it had before line power was removed An exception to this is that it always turns on in the local mode In addition some HP IB default conditions are enabled The Peak Power Analyzer goes through the following power up sequence m HP 8990A Peak Power Analyzer and a pulse are displayed for approximately three seconds During this period the Peak Power Analyzer tests the non volatile RAM Checksums are verified for the calibration data and the previous instrument settings If a calibration checksum error is detected an advisory is displayed indicating that a calibration is required If the cal RAM is protected the advisory is cal ram checksum error re cal instrument If the cal RAM is unprotected the advisory is default cal loaded re cal instrument In either case refer to the instr cal menu under the Utility Menu Perform the vertical cal and delay cal procedures installation and Operator s Maintenance HP 8990A If an instrument setting checksum error of non volatile memory is detected a recall of defa
117. ired windows 3 78 HP 8990A Display Menu CHANNEL 1 2 VIEWING AREA CHANNEL 3 4 VIEWING AREA Figure 3 31 Dual Screen Display When waveform math functions or the dual timebase window are turned on they are displayed in the lower half of the screen and the channels are displayed in the top half Figure 3 32 Quad Screen Display 3 79 Display Menu HP 8990A off frame axis grid Key This unlabeled field selects one of four display backgrounds m off The off option turns the background graticule off The displayed waveform and waveform information is not turned off m frame The frame option displays the outside border with a measurement scale The measurement scale is incremented decremented with major divisions and minor divisions based on the vertical and horizontal measurement settings m axes The axes setting displays a background with the measurement scale crossing at mid screen grid The grid background is a complete graticule with ten horizontal major divisions and eight vertical major divisions Only the axis portion of the graticule has a minor division scale nN connect dots Key 3 80 Note Connect the dots is a technique used to display a waveform with all data points connected This makes viewing the waveforms easier because the signal is compiete and has no breaks Connect the dots is available in display modes average and envelope However it is only available with min
118. irst cycle of the displayed signal is measured If a complete cycle is not present the Analyzer will average all data points The rms voltage of the first cycle of the displayed signal is measured If a complete cycle is not present the measurement will compute rms on all data points Vrms ac 1 n X 3V 1 n Y aV A 8 This Page intentionally Left Blank Index RRA RD E RPP I ET SSE I BO I I RE RP BT OES A abort Key 3 130 3 135 AC Cal Output 3 23 Accessories adapters 1 6 electrical 1 6 mechanical 1 6 Accessories Supplied 1 6 Acquisition 3 9 single 3 10 Acquisition Running 3 9 Acquisition Stopped 3 9 acquisition test 3 125 Address Peak Power Analyzer 2 1 2 14 Addressed 3 119 3 120 Address selection 2 14 add to memory Key 3 104 after fail Key 3 115 Algorithm Definitions A 4 Algorithms A 1 Amplitude at Time Markers Key 3 87 Amplitude Markers 3 85 Attenuation 3 39 attenuation menu 3 129 Automatic Measurements A 1 Automatic Top Base Measurement A 2 Autoscale 3 12 3 102 Auto Trigger 3 44 Auto Triggered Scroll 3 26 Average Display Mode 3 77 Index 1 index 2 Bandwidth setting 3 36 3 39 Bandwidth Key 3 36 Bench operation 2 16 Cables power 2 5 Calibration 3 107 order 3 127 Calibrator 3 22 Calibrator Switch 3 22 cal select Key 3 133 Carrier Frequency 3 89 Carrier Frequency Menu 3 89 Changing the fuse 2 3 chan mem Key 3 94 Channel Isolation 3 42 ch
119. isconnect the peak power sensor from the signal generator 2 Calibrate the average power meter and sensor HP 8485A or equivalent Refer to the power meter manual for this procedure if necessary 3 Connect the average power sensor HP 8485A or equivalent to the signal generator 4 Increase the power level of the signal generator until the average power meter reads the next Average Power Level for example 20 dBm in Table 4 2 5 Replace the average power sensor with the peak power sensor 6 Autoscale the Analyzer by pressing the key 7 Decrease digital averaging to the value given under Number of Averages in Table 4 2 8 Make an automatic average power reading a Press the BLUE key and then the AVG g key b Enter 1 when C appears at the bottom of the display The display will read avacis Xx where XXX is the current average power in units of mW uW or nW The average power reading should be between the two Analyzer Measured Power values listed in Table 4 2 9 Repeat these steps using all values in Table 4 2 for channel 4 of the Peak Power Analyzer Wherever CH 1 is referred to substitute CH 4 4 15 Performance Tests HP 8990A If the Peak Power Analyzer and peak power sensor fail any or all parts of this procedure refer to the peak power sensor manual troubleshooting procedure to determine whether the Peak Power Analyzer or the peak power sensor is at fault I
120. itude at time markers 3 87 ampi markers 3 85 Bandwidth 3 36 cal select 3 133 chan mem 3 94 channel 3 35 3 130 3 131 3 134 channel selector 3 89 check source 3 122 clear memory 3 104 clicker 3 121 clock 3 59 CLR MEAS 3 110 connect dots 3 80 continue 3 130 3 135 continuous 3 111 coupling 3 39 delay 3 67 Delay Key 3 27 display 3 103 3 104 Display Mode 3 76 ECL 3 40 EOI 3 120 exit menu 3 121 3 126 3 130 3 136 external loss 3 37 fail if 3 115 form feed 3 121 Function 3 93 function display 3 93 holdoff 3 45 3 52 3 60 level 3 45 marker 1 3 85 marker 2 3 85 meas meas def meas limit 3 110 more 3 39 nonvolatile 3 102 no of screens 3 78 off frame axes grid 3 80 offset 3 95 offset 3 39 operand 3 94 operator 3 94 or if 3 115 paper length 3 121 pattern 3 51 power display 3 78 present 3 60 probe 3 38 3 39 qualify on 3 65 Reference 3 27 reference level 3 36 save to 3 115 sensitivity 3 95 sensor zero 3 37 set 3 114 show status 3 122 slope 3 45 source 3 45 3 103 standard user defined 3 111 start cal 3 130 3 134 start marker 3 86 start test 3 126 statistics 3 111 stop marker 3 86 store 3 103 test 3 114 thresholds measurements 3 112 Time Division 3 26 Trig d auto 3 44 trigger on 3 68 TTL 3 40 vertical scaling 3 35 vertical sensitivity 3 38 volatile 3 103 waveform pix
121. k Power Sensor to the Sensor Check Source The part number of the adapter is HP 11903D HP 8990A Recommended Test Equipment General Information Mechanical Rack Mount Assembly The Rack Mount Assembly Kit provides the necessary hardware to mount the Analyzer in a standard nineteen inch rack The kit includes a front panel power switch and four BNC inputs to deliver signals from the Peak Power Analyzer s front panel or rear panel to the rear or front of the rack mount assembly The assembly height is 8 3 4 inches The part number of the assembly is HP 5061 6175 able 1 3 lists the test equipment recommended for use in testing adjusting and servicing the HP 8990A Peak Power Analyzer The Critical Specifications column describes the essential requirements for each piece of test equipment Other equipment may be substituted if it meets or exceeds these critical specifications The Recommended Model column may suggest more than one model The first model shown is usually the least expensive single purpose model Alternate models are suggested for additional features that would make them a better choice in some applications 1 7 General information HP 8990A Table 1 1 Specifications Warranted specifications are shown in normal typeface Supplemental characteristics are indicated with italics Supplemental characteristics provide typical or nominal performance parameters that are non warranted but are useful
122. key selects which memory to use The selections are nonvolatile memories m1 m2 m3 and m4 When a memory is turned on the small circle below the label is highlighted The waveform memories are record memories that store 2001 points of waveform information in each memory HP 8990A Waveform Memory Menu display Key This toggle key turns the selected memory display on or off source Key The source key selects the source waveform to be stored The source alternatives are any channel or either function Note When Option 001 Single Sensor Input is installed channel 4 is not useable When channel 4 is specified as a source the advisory no valid data nothing stored is displayed store Key This is the active key in the menu This key stores the selected waveform in the specified memory When the key is pressed an immediate erase of the selected memory and a write to the memory is executed rere a ana pixel Menu The pixel submenu selects the pixel memories These memories are very useful when additive memory capabilities are needed Waveforms can be stored and added to indefinitely volatile Key This is the memory select key The alternatives are pixel memory 1 or 2 The pixel memories are complete pixel saves of the waveform area excluding the graticule and markers in volatile memory The waveform display area is 256 X 451 pixels In pixel memory the entire screen is saved Therefore data is mapped directly
123. keys For example to set the vertical sensitivity to 10 mW division m Ensure mW division on the Channel 1 and 4 menu is the active field displayed in fullbright e Press 1 0 mW on the numeric keypad The blue shift key selects the alternate function of a key The CLEAR key clears a numeric entry before a terminator is selected The KNOB changes values within each function It increments decrements or toggles the selection in the active field or function The current selection is shown in fullbright The FINE key changes the increment and decrement step size Instead of changing in the normal sequence the values increment decrement in more precise values Use this feature when the normal sequence is too coarse for precision measurements or settings Not all parameters are affected by the FINE key This key toggles on and off When the Peak Power Analyzer is operating in the fine mode the word fine is displayed in the lower right corner of the display Local Operation HP 8990A ee a Input The input section consists of connectors for signal input Channels 2 and 3 have a nominal 1 MQ input impedance a shunted by approximately 16 pF at the input BNC and a maximum tolerance of 100 V The peak power sensors are connected to channels 1 and 4 For more information refer to the Operating and Service manual for the peak power sensor ee EE al Sensor Check Source A 1 GHz signal at a level of 10
124. l be made channel memory or function The two fields on the right select the marker that will be used to make the measurement start marker or stop marker When a field has been highlighted change the field by using the knob 3 87 3 88 This Page Intentionally Left Blank Carrier Frequency Menu Introduction to the Carrier Frequency The Peak Power Analyzer has two power channels channels 1 4 This chapter describes how to specify the carrier frequency of the pulsed or CW source being measured The frequency is used to look up calibration data in the peak power sensor s internal table of calibration factors Specifying the carrier frequency is necessary to make accurate power measurements The carrier frequencies can be set independently or simultaneously Carrier Freq MENU chicha ch t ch4 Figure 3 35 Carrier Frequency Menu 3 89 Carrier Frequency Menu HP 8990A Channel Selector Key 3 90 Channels 1 and 4 coupled Channels 1 and 4 separate This key is labeled CARRIER FREQ It is used to choose whether the carrier frequencies seen at the sensor inputs are different ch1 ch4 or the same ch1 amp ch4 The active area is highlighted This key is displayed when the selection is made to set the carrier frequencies to the same frequency The field is highlighted when selected and ready for data entry Valid entries are 1 MHz to 200 GHz Data is entered using the knob or the n
125. lk g a EA zage state TIETE tx H i x when ex ted 80 ooo ons 0 09000 10 0 ns div Figure 3 19 XHLX when exited Pattern m Change the bit pattern to XHHX and select the entered condition To satisfy this bit condition both channels must be high The Peak Power Analyzer does not trigger until channel 3 goes high while channel 2 is high HP 8990A Trigger Menu fe running PATTERN TRIGGER Fe hk A EEEE eee ee PETS trig d EEE Aasmaan aaaea aaa priere BARE ne ee e Saat at Oo a aanl Aate eTa x H x When entered 10 0 ns div f haldeff _ t ine EDR UCOEET Figure 3 20 XHHX when entered Pattern m Change the trigger condition to when exited When channel 3 is high and channel 2 goes low the bit pattern is no longer true and the Peak Power Analyzer triggers 3 57 Trigger Menu HP 8990A PATTERN TRIGGER trig d fp running 50 000 ns G 06000 s 36 000 ns 10 0 ns div hoidat f tine GReeierstemriT Figure 3 21 XHHX when exited Pattern State Trigger State trigger mode is similar to pattern trigger mode Mode except that one channel is selected as a clock edge and the other three channels define a pattern When the pattern becomes true the Peak Power Analyzer triggers on the next clock edge if the pattern meets setup and hold criteria 3 58 HP 8990A clock Key when Key Trigger Menu present is is
126. lope to rising edge 3 69 Trigger Menu 3 70 HP 8990A Select a delay time of 2 5 ms to gain a stable trigger Highlight the area next to delay Use the knob if l time is not displayed Highlight the area below time Set the time with the knob or the keypad If the keypad is used terminate the entry will one of the suffix keys Set trigger on to trigger on rising edge 1 of channel 2 Highlight the area next to count Use the knob to enter a 1 Highlight the slope With the knob set the slope to positive Highlight the area next to the slope Set that area to 2 using the knob This trigger setup qualifies on the first rising edge of the burst delays through the remaining portion of the burst and then triggers on the specified edge of the next burst HP 8990A Trigger Menu Ag running TINEBASE reference H lett right om Window mm o etal t i sa sananseiote a e mnou evaristuvarrs ps eose vor ae annansarionavesnns sist cimusan artas simpaotjajaopti p a moye a o aby Sk sen sevurrvars Genromnsie setia atia or aranista bi at ad 2 50000 us 9000 2 50000 us 500 ns diyv Figure 3 27 Ten Burst Pulse w Stable Trigger Select the menu key m Set the time division to 500 ns Return to the trigger menu and set trigger on count to 5 It will be necessary to use the key to set the trigger on count This tells the Peak Power Analyzer to trigger on the 5th rising edge of the burst s
127. m Math Menu fl f2 display chan mem operator chan mem function sensitivity function offset Waveform Memory Menu wavelorm pixel nonvolatile display source off off 1 GHz off off off chan 1 chan 1 64 mW Div 0 0 W waveform ml off chan HP 8990A Local Operation Table 3 1 Preset Default Conditions continued Define Meas Menu meas def limit meas meas continuous on statistics off meas def definition standard meas lirit test off set risetime fail if gt 50 0000 s or if lt 1 000 ns save to off after fail stop Utility Menu HP IB Menu form feed paper length clicker check source Instrument Overview Front Panel This section describes the functional sections of the Peak Power Analyzer s front panel The description of each section also explains its interactions with other sections and provides a basis for applications and usages The Peak Power Analyzer has been designed for ease of use The front panel is separated into six functional areas 3 7 Local Operation HP 8990A DISPLAY FUNCTION KEYS Sele SYSTEM CONTROL MENUS INPUTS ENTRY DEVICES Figure 3 1 HP 8990A Front Panel System Control The System Control keys are located along the top of the Peak Power Analyzer and to the right of the display This section controls the following functions z dynamic display features m selecting local control m activating hardcopy 3 8 HP 8990A L
128. ments 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 Warranty This Hewlett Packard instrument product is warranted against defects in material and workmanship for a period of one year from date of shipment During the warranty period Hewlett Packard Company will at its option either repair or replace products which prove to be defective For warranty service or repair this product must be returned to a service facility designated by Hewlett Packard Buyer shall prepay shipping charges to Hewlett Packard and Hewlett Packard shall pay shipping charges to return the product to Buyer However 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 or 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 Buyer Buyer supplied software or interfacing unauthorized modification or misus
129. mid threshold crossing of first rising edge else Pulse width mid threshold crossing of second falling edge minus mid threshold crossing of first rising edge User defined is the same as Standard definition except user defined threshold Offtime The offtime algorithm has standard and user defined considerations if first edge is rising then offtime second rising edge first falling edge else Algorithms PRI PRF Duty Cycle Note Risetime Falltime HP 8990A offtime first rising edge first falling edge if first edge is rising then PRI second rising edge first rising edge else PRI second falling edge first falling edge PRF 1 PRI duty cycle pulse width PRI 100 Pulse width is always calculated using mid threshold tisetime time at upper threshold time at lower threshold falltime time at lower threshold time at upper threshold Overshoot Overshoot PESE P 109 Note A 6 top base The algorithm will tend to fail for overshoot values exceeding 50 HP 8990A Vmax Vmin Vp p Vtop Vbase Vamp Vavg Vrms Algorithms Vmax amplitude of the maximum point on screen Vinin amplitude of the minimum point on screen Vp p Vmax Vmin For voltage only Viop most prevalent point above waveform midpoint Vbase most prevalent point below waveform midpoint i Vamp Vtop Vbase For voltage only Average amplitude of the f
130. mode the Peak Power Analyzer generates a trigger if one is not present If a trigger is not found a trigger is generated and acquired data is displayed A status message is displayed in the upper left corner of the screen If the Peak Power Analyzer is auto triggered and the sweep speed is 200 ms div 500 ms div 1 s div 2 s div or 5 s div it operates in the auto triggered scroll mode HP 8990A source Key level Key Note slope Key holdoff Key Trigger Menu and displays data points as they are acquired For additional information refer to the Timebase Menu This key selects the trigger source The options are channels 1 4 The current selection is highlighted in inverse video The level key sets the trigger level The range for channels 2 and 3 is 6 divisions from center For channels 1 and 4 it is 6 divisions from center This function provides flexibility for setting exact triggering points and specifies levels used in the more sophisticated triggering modes For maximum accuracy calibration of the Peak Power Analyzer should be performed only if the temperature of the Peak Power Analyzer not the sensor has changed significantly The accuracy error for every degree Celsius deviation from the last calibration is 0 15 deg C 0 006 dB deg C A change in temperature will also have an affect on the trigger level accuracy of channels 1 and 4 The vertical calibration procedure which performs this calibration is
131. n 8th Floor H P Building 337 Fu Hsing North Road Taipei Taiwan 886 2 712 0404 vii General Safety Considerations Before Applying Power Safety Earth Ground viii Warning This Product and related documentation must be reviewed for familiarization with safety markings and instructions before operation This product if a Safety Class I system provided with a protective earth terminal Verify that the product is set to match the available line voltage and the correct fuses are installed An uninterruptable safety earth ground must be provided from the main power source to the product input wiring terminals power cable or supplied power cable set Any interruption of the protective grounding conductor inside or outside the system or disconnecting the protective earth terminal will cause a potential shock hazard that could result in personal injury Grounding one conductor of a two conductor outlet is not sufficient protection in addition verify that a common ground exists between the unit under test and the system prior to energizing either unit Whenever it is likely that the protection has been impaired the system must be made inoperative and be secured against any unintended operation If this system is to be energized via an autotransformer for voltage reduction make sure the common terminal is connected to neutral that is the grounded side of the mains supply Servicing in
132. n can be corrected through probe attenuation down to 0 9 attenuation m Below 0 9 the error message Attenuation less than 1 see manual for action is displayed The corrective action is to recalibrate the Peak Power Analyzer Perform vertical cal under the instr cal menu 3 129 Utility Menu 3 130 channel Key start cal Key continue Key abort Key HP 8990A If the probe is not connected to the DC CAL OUTPUT on the rear panel or the probe attenuation exceeds approximately 250 the error message Attenuation too high or bad connection is displayed The corrective action is to check the connections and recalibrate If recalibration is unsuccessful refer to the Peak Power Analyzer Service Manual a If the probe attenuation calibration is successful the displayed message is Probe Attenuation n nnann This value has been entered into your channel probe setting Pressing this key selects a channel to calibrate By continually pressing the key the fields are incremented by channel When the channel to be calibrated has been selected press start cal The advisory appears at the bottom of the waveform display area Connect the DC Cal rear panel BNC to the probe of channel n then press continue Pressing this key prompts the user with setup requirements Press this key when all setup requirements have been satisfied The actual calibration process begins This is the only active front panel key during the calibra
133. n is set with this key This setting is for ease of viewing and making measurements with the newly developed waveform The offset of the function is set with this key When a function consists of one or two power operands and the offset is set so the bottom of the function is clipped an error may occur when a measurement is made on the function E rr rt I A CA A ttt Vertical Scaling Units Functions are displayed in linear format only The fundamental measuring units of a function are watts division channels 1 4 and volts division channels 2 3 in the vertical axis and time division on the horizontal axis Where the units of the function cannot be determined they are shown as UDF KUDF or mUDF etc for undefined or user defined 3 95 Waveform Math Menu HP 8990A i iM IA NI Displaying The Peak Power Analyzer has several screen variations Functions available to accommodate a 4 channel display as well as two functions w In the single screen mode with a function on the mathematical results are displayed in the bottom half of the screen while the operands are superimposed in the top half of the screen CHANNEL 1 2 VIEWING AREA CHANNEL 3 4 VIEWING AREA Figure 3 37 Single Screen w Function On w In the dual screen mode the functions are again displayed in the bottom half of the screen However the dual screens are displayed in the top half 3 96 HP 8990A Waveform Math Menu Figure 3 38 Dual Sc
134. nal loss key will affect the vertical sensitivity When the knob is used vertical sensitivity changes in a 1 2 5 sequence in linear and log mode The FINE key will affect scaling in linear mode 3 35 Channel Menu reference level Key 3 36 log mode only Bandwidth Key HP 8990A This key is used to set the reference level at the top line of the display When this function is selected either of the entry devices can be used for data entry Allowable levels are affected by the linear units per division setting and the external loss setting The FINE key can be used during reference level selection Noise may be visible on the detected signal from the peak power sensor The bandwidth key is used to minimize the affect of the noise This key selects the available bandwidth of an internal low pass filter The maximum bandwidth available is 150 MHz There are two variable parameters which determine the bandwidth Vertical sensitivity m Under rare conditions the temperature at the peak power sensor will affect internal amplifier selection This field has three possible selections A selection is made by pressing the softkey until the desired area is highlighted m Auto When auto is selected the Peak Power Analyzer selects the optimum level between available bandwidth and noise a Low When low is selected the bandwidth is the lowest possible with the selected vertical sensitivity e High When high is selected
135. noise peaks Under these conditions trigger events occur only on high level peaks in the noise Since the trigger event always occurs at the same position on the screen left center or right as selected the traces of these high level noise peaks appear at this position as an apparent hump or spike in the noise display Note that a noise hump is extremely unlikely when there are signals present above the noise level And this will never occur when employing external triggering Trigger Mode Interaction The trigger level threshold for each channel is set in the edge trigger mode and is independent for each channel it is carried over to all other modes These levels are important settings because the high and low levels in the pattern state and delay modes are greater than or less than the trigger level Edge Trigger Mode The edge trigger mode has the following selections a trig d auto m trigger source m trigger level x slope a holdoff 3 43 Trigger Menu HP 8990A Trig MENU Edge Trigger trig d auto oree imt holdoff Figure 3 13 Edge Trigger Menu Trig d auto Key 3 44 The trig d auto selection toggles between the two trigger modes The current selection is displayed in inverse video This field is available in all trigger menus In the triggered mode the Peak Power Analyzer does not acquire data until all of the trigger requirements are satisfied In the auto
136. nstalled channel 4 is not useable When channel 4 is specified as one of the operands the advisory channel is off cannot compute function is displayed a i aa Defining a Function Function Key display Key Note The Waveform Math menu selects and presets any of various operations sources and displayed results This key selects either function 1 or function 2 as the label for the operation performed on the selected operands The display key turns the selected function on or off When turned on the parameters associated with the function are displayed in the function menu fields If the function display is turned on the screen will split with the original waveforms displayed in the top half screen while the functions are displayed in the bottom half screen Both functions can be on at the same time and are displayed superimposed or in two screens in the bottom half of the display if multiple screens have been selected If the display has more windows than are desired it may be that additional windows have been enabled with the Display Menu Select this menu to turn off the undesired windows The timebase window is automatically turned off when a function is turned on 3 93 Waveform Math Menu 3 94 chan mem Key Operator Key Note HP 8990A Press this key to select the first operand of the mathematical operation or the waveform to be manipulated The choice can be any displayed c
137. o save will be performed The test can be stopped after a failure occurs or the test can be set to continue 3 115 3 116 This Page Intentionally Left Blank Utility Menu Introduction to the The Utility Menu accesses the calibration and service Utilities functions as well as sets up the HP IB interface The submenus include selftest calibration service and an instrument status listing These submenus are part of the Utility Menu HP IB menu show status selftest menu probe cal menu instr cal menu service menu 3 117 Utility Menu HP 8990A Utiltty MENU HP IB menu i clicker off on check source off pulse cw show status more self test menu probe cal menu instr cat manu service menu more Figure 3 44 Utility Menu 3 118 HP 8990A Note Utility Menu The following submenus can be unexpectedly overwritten with messages or data when an HP IB command initiates a new data acquisition cycle These menus should be avoided while controlling the Peak Power Analyzer over the bus The Root Level Command MENU can be used to switch from one of these menus m Selftest Menu m Probe Cal Menu m Instrument Cal Menu m Service Menu Show Status Menu eee ae HP IB Menu The HP IB submenu is used to set up the Peak Power Analyzer so it can talk to peripheral devices This interface includes two primary settings m talk only mode a addressed mode 3 119 Utility 3 120
138. oaxial cable is approximately 6 to 7 ns This time delay is used to demonstrate the Peak Power Analyzer s triggering capability mw Press AUTOSCALE m Select the TIMEBASE menu key z Set the following timebase parameters Timebase 10 00 ns div delay 0 00 s reference cntr window off m Select the menu key 3 61 Trigger Menu 3 62 HP 8990A x Set the following channel 2 parameters Vertical sensitivity 400 mV div offset 125 mV dc coupling a Set the following channel 3 parameters Vertical sensitivity 400 mV div offset 125 mV de coupling m Select the menu key u Set the following display parameters minimum persistence 2 screens a Select the menu key Set the following trigger parameters while in edge trigger Channel 2 level 125 mV Channel 3 level 100 mV Set the trigger mode to state m Set the pattern to X7LX as follows 1 Press the function key until the first bit is highlighted 2 Turn the knob until the highlighted area is X 3 Select the next bit in the pattern and select f 4 Continue until all bits are selected in the XTLX pattern a Press the when key until is present is selected see figure 3 23 HP 8990A ap running PES wae Trigger Menu STATE TRIGGER peri EEE Stan E NEA ha EE ETET trig d ES 2 parenie edqe pattern j oA tem EFOok 2 4 3 4 WREN mena x 1 Mx 1s not P present 0 00000 5 50 000 ps
139. ob or the numeric keypad Valid addresses are 0 through 30 If the keypad is used select one of the terminators such as w or to enter the address 5 Press exit menu to return to the Utility menu 2 14 installation and HP 8990A Operator s Maintenance The Peak Power Analyzer can be set to Talk Only Mode This mode is used for example when the Peak Power Analyzer outputs data to a printer The following procedure describes how to set Talk Only Mode 1 Press the key on the front panel 2 Press the HP IB menu softkey 3 talk only Press the addressed softkey until talk only is highlighted 4 Press exit menu to return to the Utility menu Tabie 2 2 Allowable HP IB Address Codes Decimal Listen Talk Decimal Listen Talk Equivalent Address Address Equivalent Address Address Character Character Character Character ry W o Yo o a o N ere D l St ce nm WO A B C D E F G H I J K L M N Q i Decimal values are equivalent to the last five bits of both talk and listen addresses 2 Decimal 7 is the factory set HP IB address Instaliation and Operator s Maintenance HP 8990A Operating Environment The operating environment is specified to be within the following limitations Temperature 0 C to 55 C Humidity lt 95 relative Altitude lt 4570 metres 15 000 feet et i a Bench Operation The Peak Power Analyzer has plastic feet and fold
140. ocal Operation Z SYSTEM CONTROL es Figure 3 2 System Control Section Selection of any key in the System Control section will cause the Peak Power Analyzer to execute that command immediately RUN STOP The Run Stop key toggles the acquisition status of the Peak Power Analyzer If the Peak Power Analyzer is currently running current status is displayed in the top left corner of the display in the message field the instrument is placed in the stopped mode In this mode acquisition is stopped and the last acquired data is displayed If the Peak Power Analyzer is started it is immediately changed to another mode for example running awaiting trigger auto trigger etc 3 9 Local Operation 3 10 SINGLE CLEAR DISPLAY LOCAL HARDCOPY HP 8990A The Single key activates the acquisition system for one trigger event One acquisition is made displayed and then the data acquisition and display cycle is stopped This single acquisition is superimposed on the current displayed data If the display has been cleared before the single key is pressed only one acquisition is displayed The Clear Display key clears the display and resets all associated measurements If the Peak Power Analyzer is in the stopped mode all data that is currently displayed is erased If the Peak Power Analyzer is running all data is erased however new data is displayed on the next acquisition The RUN STOP SINGLE and CLEAR DISPLAY key
141. of time is frequency this ratio produces an answer in hertz However be alerted that if the markers are placed across parts of a waveform of differing time frames the answer may not be valid This feature is useful when looking for the frequency in a burst that is different from the rest of the waveform Place the time markers across the burst at similar points on the waveform and determine the frequency of the burst start marker To set the start marker press the function key to highlight the field This makes the start marker field active Set the marker using the knob The start marker is represented with long dashes stop marker The stop marker is identical to the start marker except that it is represented by short dashes 3 86 HP 8990A ampi time mkrs Note Markers Menu This key is available if the time markers have been turned on The key is used to make an amplitude measurement at a specific point on a waveform The measurement can be made on a channel memory or function The result is shown at the bottom of the display The delta between the two markers is also available Before making an amplitude at time measurement on a waveform in memory be sure the current timebase is set to the timebase of the stored waveform Press the key repeatedly Observe how the highlight moves from field to field The top field turns the feature on or off The two fields on the left select where the measurement wil
142. on the first leftmost portion of the displayed waveform that can be used If there are not enough data points the Analyzer will display lt with the measurement results This is to remind you that the results may not be as accurate as possible It is recommended that you re scale the displayed waveform and make your measurement again When any of the standard measurements are requested the Peak Power Analyzer first determines the top base linear amplitude levels at 100 0 From this information it can determine the other important linear amplitude values 10 90 and 50 needed to make the measurements The 10 and 90 linear amplitude values are used in the risetime and falltime measurements as well as in all other edge measurements The 10 and 90 values are also used to determine the 50 value The 50 linear amplitude value is used for measuring PRF PRI pulse width and duty cycle Di na o s wmeen Automatic Top Base A 2 Top Base is the heart of most automatic measurements It is used to determine Viop and Vbase the 0 and 100 linear amplitude levels at the top and the bottom of the waveform From this information the Analyzer can determine the 10 50 and 90 points which are also used in most measurements The top or base of the waveform is not necessarily the maximum or minimum linear amplitude present on the waveform Consider a HP 8990A een is
143. onto the display and displayed in halfbright There are no measurement capabilities on pixel memories Pixel memories are additive Only unlit pixels are effected by subsequently adding to memory When all 3 103 Waveform Memory Menu display Key clear memory Key add to memory Key HP 8990A pixels are full adding to memory will merely overwrite existing data This toggle key turns the selected pixel memories on or off This key purges all data from the selected pixel memory By pressing this key the currently displayed waveforms are added to the specified pixel memory Waveform Memory Exercise Analyzer Setup Note 3 104 Using the Sensor Check Source this exercise demonstrates how to store a waveform change the vertical sensitivity setting and recall the stored waveform to be compared with the current display This procedure assists you in setting up the Peak Power Analyzer for optimal viewing Connect the peak power sensor to channel 1 and the Sensor Check Source Adapters HP Part Number 1250 1744 for the HP 84813A Peak Power Sensor and HP Part Number 11903D for the HP 84814A Peak Power Sensor will be needed These adapters are not supplied with the Analyzer m Press and then CLEAR o Default settings were recalled mc The Sensor Check Source was turned on and set to pulse m Select the menu key HP 8990A Waveform Memory Menu Press the connect dots key until on is highligh
144. op Base Edge Definition Algorithm Definitions i ae oe delay oe oe ke ws ae GOR ee Pulse Width Offtime BE d eui aLa a SE An ed PRE esgara Sn See he aw bs Duty Cycle Risetime amp sa uoa a amp ade wi Falltime Overshoot a oao a aaa V max Vmin Vp p top oi hee YES ee a ee a Ye me eo iets Vobase Vamp Vavg Vrms Index 4 43 4 44 A 1 A 1 A 2 A 2 A 3 A 4 A 5 A 5 A 6 A 6 A 6 A 6 A 6 A 6 A 7 A 7 A 7 A T A 7 A 7 A 7 Figures SLA SLE IL INL ER I NIE TEE I LTTE ET ES ENB ATT ET TS NA RE PT IP AED aE RTO HP 8990A Peak Power Analyzer with Accessories Supplied l Selecting the Line Voltage Checking for the Correct Fuse Power Cable and Line Mains sia Part Numbers 68 6e82 1 HP 8990A Front Panel 2 System Control Section Setup Section oaa Show Key aoaaa we ay S Entry Section 4 2 Function Keys noaoo Menus Section 2 Rear Panel Features Timebase Menu 1 3 10 3 11 3 12 3 13 3 14 3 15 3 16 3 17 3 18 3 19 3 20 3 21 3 22 3 23 3 24 gt a k s Input Signal for Window Viewing Input Signal with Window Turned on HP 8990A Channel Menu Edge Trigger Menu Two Burst Waveform after Atosa Two Burst Pulse 2 Two Burst Pulse w Stable Trigger Pattern Trigger Menu XHLX when entered Pattern XHLX when exited Pattern XH
145. ote This chapter describes the functional sections of the Peak Power Analyzer s front panel The description of each section also explains its interactions with other sections and provides a basis for applications and usages Before the instrument is switched on all protective earth terminals extension cords autotransformers and devices connected to it should be connected to a protective earth grounded socket Any interruption of the protective earth grounding will cause a potential shock hazard that could result in personal injury Only 250V siow blow fuses with the required rated current should be used Do not use repaired fuses or short circuited fusehoiders To do so could cause a shock or fire hazard Before turning the Peak Power Analyzer on be sure that the Calibrator switch on the rear panel is in the PROTECTED position Local Operation Turn On Procedure Note Power up Sequence 3 2 HP 8990A H the Peak Power Analyzer is already plugged in press the LINE switch to ON 1 The LINE switch is located on the rear of the Peak Power Analyzer If the power cable is not plugged in follow these instructions On the rear panel 1 Check the line voltage module for correct voltage selection 2 Check that the fuse rating is appropriate for the line voltage being used see figure 2 2 Fuse ratings are printed on the rear panel 3 Plug in the power cable 4 On the rear panel press the L
146. play off on off on source clear chant gt 4 memor y func 1 2 store memory Figure 3 41 Waveform Memory Menu 3 101 Waveform Memory Menu HP 8990A waveform pixel Key This is the selection key used to choose the desired type of memory The active menu is highlighted Each memory type waveform or pixel has a separate menu When this key is pressed the rest of the menu changes waveform Menu 3 102 nonvolatile Key The waveform menu has four available memories m1 m2 m3 and m4 These memories are nonvolatile and are not cleared during AUTOSCALE RECALL CLEAR or recycling power This permits disconnection of power and transportation of the Peak Power Analyzer without losing the contents of waveform memories A waveform memory consists of a single waveform record including the horizontal and vertical scaling parameters This allows measurements on stored waveform and function data Amplitude and time markers can be set on waveforms when they are displayed When the Peak Power Analyzer is in the envelope display mode and a waveform store is executed the min value and max value are stored separately The min value will be stored in m1 if m1 or m3 are the selected storage locations or m2 if m2 or m4 are the storage locations The max values are stored in m3 or m4 respectively A store message is displayed above the waveform display area informing you of the storage locations of both values This
147. put Level 17 dBm Pulse width 1 ms Repetition rate 600 Hz 2 Set up the display with a grid and 128 digital averages Press the pisPLay key Select highlight grid with the 5th function key from the top Select avg with the top function key Change of avg to 128 using the knob 3 Connect the peak power sensor to CH 1 as in Figure 4 9 4 Turn channel 1 on and all other channels off Press the CHAN VERT menu key Highlight the desired channel Turn the channel on or off using the second function key 5 Set the carrier frequency of the Peak Power Analyzer to 3 GHz Press the CARRIER FREQ menu key 4 35 Performance Tests 4 36 6 HP 8990A Press the top function key until chl ch4 is highlighted Enter 3 GHz with the knob or the keypad Select low bandwidth Press the key Select the bandwidth softkey and highlight lew To measure power with the Peak Power Analyzer l Connect the peak power sensor to the signal generator as in Figure 4 9 Press to scale the signal on the Peak Power Analyzer display The Analyzer has finished autoscaling the signal when it displays the message runnims or Mautoiriogueriog Make an automatic average power measurement with the Analyzer a Press the BLUE Shift key b Press the Avg g key c When Ch appears on the bottom of the display press 2 Turn on the continuous measurement feature of the Analyzer so t
148. r channel refer to the Peak Power Analyzer Service Manual If necessary you may record measurement results in the Performance Test Record at the end of this chapter 4 45 Performance Tests HP 8990A Table 4 3 Performance Test Record Hewlett Packard Company Tested By HP 8990A Peak Power Analyzer Serial Number ma n Date RISETIME AND FALLTIME Channels 1 and 4 2 mW 3 dBm 25 uW 16 dBm 2 5 pW 26 dBm 0 63 uW 32 dBm RISETIME AND FALLTIME Channels 2 and 3 POWER MEASUREMENT RANGE 32 dBm 20 dBm 0 dBm 10 dBm 20 dBm il O Fail SENSOR CHECK SOURCE POWER LEVEL esaw naw CW 8 9 mW 11 2 mW Pulse 8 9 mW 11 2 mW BANDWIDTH M Channel 2 5 6 Divisions Channel 3 5 6 Divisions 1 Specification for the HP 84815A is lt 45 ns 4 46 HP 8990A Performance Test Record continued OFFSET ACCURACY 1 Volt Channel 2 1 Volt Channel 3 2 Volts Channel 2 2 Volts Channel 3 TRIGGER SENSITIVITY Stable Display at 500 W Channel 1 Channel 4 Stable Display at 5 uW Channel 1 Channel 4 Stable Display at 500 nW Channel 1 Channel 4 Stable Display at 1 MHz Channel 2 Channel 3 Stable Display at 100 MHz Channel 2 Channel 3 DELTA T ACCURACY Channel 2 38 7 ns Channel 3 38 7 ns Performance Tests 0 4 Divisions 0 4 Divisions 0 4 Divisions 0 4 Divisions 2 Division 2 Division 2 Division 2 Division 4 47
149. r channel four If these conditions are satisfied by the inputs the Analyzer generates a trigger event When any channel is not being used in the qualifier pattern it should be set as don t care The trigger level is still compared to the no input channel and a high or low is determined The only true don t care is X If the pattern XXXX is selected a trigger event does not occur because a trigger event is not defined This key controls five sets of conditions that must be satisfied to generate a trigger event These conditions are as follows m when entered a trigger is generated on the first transition that makes a pattern true The pattern must be false and go true to generate the trigger 3 51 Trigger Menu 3 52 holdoff Key HP 8990A when exited a trigger is generated on the first transition that makes the pattern false The pattern must be true and go false to generate a trigger m when present gt a trigger is generated when a trigger pattern is true longer than a specified minimum time period This time period is specified in the next selection key that is activated when present gt is selected The present gt time ranges from 20 ns to 160 ms when present lt a trigger is generated when a trigger pattern is true less than a specified maximum time period This time period is specified in the next selection key that is activated when present lt is selected The present lt time range
150. reen w Function On In the quad screen mode all four screens are displayed in the top half of the display while the function s are displayed in the bottom half FUNCTION 1 FUNCTION 2 L3 Figure 3 39 Quad Screen w Function On 3 97 Waveform Math Menu HP 8990A Waveform Math Exercise Analyzer Setup 3 98 In this exercise you will use the Waveform Math menu to subtract one waveform from another The following procedure will assist you in setting up the Peak Power Analyzer for optimal viewing m Connect a peak power sensor to channel 1 and the Sensor Check Source m Press and then CLEAR Default settings have been recalled The Sensor Check Source has been turned on and set to pulse Press the DISPLAY menu key Press the connect dots key until on is highlighted E Press AUTOSCALE m Store the waveform in waveform memory Press the WFORM MEMORY menu key Press the source softkey until chan 1 is highlighted Press nonvolatile until m1 is highlighted Press store The waveform is now stored in waveform memory one m1 Press display until on is highlighted a Place a 3 dB attenuator pad between the Sensor Check Source and the peak power sensor Select the menu and adjust the trigger level for channel 1 if necessary for a stable display mw Press the WFORM MATH menu key HP 8990A Waveform Math Menu Press the first softkey until f1 is highlighted
151. res that Di splay dictate how the acquired data is displayed These features include ways to manipulate data for clarity and eliminate noise view best case worst case situations and control of the displayed background This chapter describes the Display menu three submenus how to contro all the features and how to display the most meaningful waveform for measurements Display MENU persistence of avg mintimum infinite 1 2 48 power display power display power display linear iog linear log f finear log of screens af screens of sereens 1 2 4 1 2 4 1 2 4 off frame oft frame off fromes axes grid axes grid oxes grid connect dots connect dots connect dots off on offon of f on Displayed for min i mutt persistence only Figure 3 30 Display Menu 3 75 Display Menu HP 8990A Display Mode Key 3 76 Note norm The Display mode key selects from one of the three display modes m normal m averaged a envelope If it is necessary to display a very narrow pulse width increasing persistence or using envelope mode will help The norm mode sets the time parameters for displaying data or persistence The range in the variable persistence mode is from minimum very fast overwriting and updating the display to infinite with variable settings in between from 200 ms to 10 seconds This means data display records can be preset to any of the persistence settings Settings less than infinite will display data
152. rigger level if necessary for a stable display a Select the menu key b Verify that the source is set highlighted to 2 c Adjust the level with the keypad or knob until the waveform is stable On the average power meter enter the calibration factor for 100 MHz Adjust the signal generator output power for 0 dBm as read on the power meter Observe the waveform on the Peak Power Analyzer display The waveform should be greater than or equal to 5 6 divisions peak to peak Disconnect the signal generator from channel 2 and connect it to channel 3 Repeat this full procedure for channel 3 If either of the measurements failed refer to the Peak Power Analyzer Service Manual If necessary test results may be recorded in the performance test record at the end of this chapter 4 29 Performance Tests HP 8990A Checking Offset Accuracy Specification Description Equipment Required 4 30 Electrical Performance Characteristics Limits 2 of offset 0 2 x V div ae This test measures an average dc voltage at maximum vertical offset on channels 2 and 3 The offset accuracy is checked by supplying an accurate voltage and displaying it at a known offset and vertical sensitivity The offset and scale are chosen such that the calculated maximum permissible offset from the center of the display is easily read using the division markings on the screen POWER PEAK ode POW
153. rm before the trigger event Therefore a delay setting of 50 ns indicates that the trigger event occurs 50 ns after the delay reference point reference trigger event delay The reference key changes the delay reference point to one of three possible settings u left cntr center E right These correspond to the left center and right portions of the display If delay is set to 0 the reference point consists of pre trigger data to the left and post trigger data to the right 3 27 Timebase Menu HP 8990A ELAR IIIe Window Key The window function turns on an expanded timebase and the Peak Power Analyzer is placed in a multiple screen mode The original waveform and its timebase setting are displayed in the top screen with markers vertical dotted lines that enclose a portion of the waveform The enclosed portion of the waveform is displayed in the bottom screen Note The displayed timebase information under the waveform display area is windowed timebase information When the window is on all measurement results and information are windowed information If the display has more windows than are desired it may be that additional windows have been enabled with the Display Menu or the Wform Math Menu Select these menus to turn off the undesired windows This feature is much the same as the delayed sweep on an analog oscilloscope However with the dual screen a portion of the original waveform can be viewed Th
154. rument The suffix however is assigned sequentially and is different for each instrument A Manual Change Package is shipped with the Peak Power Analyzer when a change has been made to the instrument The package consists of replacement pages The package is identified by it s own part number The Hewlett Packard Model 8990A Peak Power Analyzer provides complete pulse characterization in the range of 500 MHz to 40 GHz depending on the peak power sensor used The Analyzer has a dynamic range of 32 to 20 dBm It is compatible with the HP 84812A 84813A and 84814A line of Peak Power Sensors All functions are fully programmable The Peak Power Analyzer has four channels and is menu driven Two channels are RF and two are video Ten functions are available through the menus timebase channel selection triggering display setup markers carrier frequency selection waveform math waveform memory waveform measurement and utilities The RF or video signal can be characterized for the following parameters peak power average peak power risetime falltime frequency Pulse Repetition Rate pulse period Pulse Repetition Interval pulse width pulse off time duty cycle delay statistically defined pulse top and pulse bottom overshoot and average power External and internal triggering are available The two video channels which are used for external triggering HP 8990A Options General information also have l
155. s from 20 ns to 160 ms R range this trigger condition is a combination of present lt and present gt A trigger is generated when a trigger pattern is true for longer than a specified minimum and shorter than a specified maximum time period These time periods are specified in the next two selection keys that are activated when range is selected The first range time setting must be less than the second range time setting The holdoff key assigns the entry devices to control holdoff Holdoff disables the trigger circuit for a selectable time period after the trigger event Holdoff is selected in time units from 40 ns to 320 ms and is incremented in 20 ns intervals HP 8998A Trigger Menu rn nares einai anes inne aeee Pattern Trigger Exercise Note Pulse Generator Setup This exercise demonstrates how to define the 4 bit pattern and how it affects the trigger and the resulting display Set the trigger level for each trigger source while in edge trigger mode These trigger levels must be set before you go to the pattern mode or proper triggering may not occur To perform the following exercise use the HP 8116A Pulse Generator or another pulse generator capable of producing the same type of signal Set up the Pulse Generator as follows u Mode NORM m FRQ 1 00 MHz e DTY 50 a AMP 1 00 V a OFS 200 mV a Pulse squarewave Connect a BNC tee to channel 2 of the Peak Power Analyzer Place a 50 Q
156. s have a relationship that make it possible to manipulate data acquisitions and view one two or several acquisitions It is possible to stop acquiring clear the display and capture one acquisition for evaluation The display can be cleared while acquiring new data The acquisitions can be manipulated with these three keys while other keys and settings are not affected The Local key sends a return to local control message to the HP IB interface and returns control to the front panel This key can be locked out if a local lockout command is executed over HP IB This is the only active front panel key while the Peak Power Analyzer is in remote operation if it has not been locked out This key executes an immediate hardcopy of the currently displayed data to a compatible graphics printer All other Peak Power Analyzer functions are stopped during printing A controller should not be connected to the bus when a hardcopy is requested The Peak Power Analyzer must HP 8990A Local Operation be set to talk only and the printer must be set to listen only Setup of the hardcopy options are accessed in the HP IB submenu see Utilities Menu Selection of any key aborts the hardcopy function eee al Setup The Setup section controls subsystems for proper display of data This section includes the following functions m AUTOSCALE for automatic scaling of the waveform display area m SAVE and RECALL for saving and recalling
157. structions are for use by service trained personnel only To avoid dangerous electric shock do not perform any servicing unless qualified to do so Adjustments described in the manual are performed with power supplied to the system s instruments while HP 8990A Safety Symbols Warning Caution General information protective covers are removed Energy available at many points may if contacted result in personal injury Capacitors inside the system s instruments might still be charged even if the system has been disconnected from its source of supply For continued protection against fire hazard replace the line fuses only with 250V fuses of the same current rating and type for example normal blow time delay etc Do not use repaired fuses or short circuited fuse holders A Instruction manual symbol The product will be marked with this symbol when it is necessary for the user to refer to the instruction manual See Table of Contents for page references i Indicates hazardous voltages we Indicates earth ground terminal Warning 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 denotes a hazard It calls attention to a procedure practice or the like which if not correctly perform
158. t the equipment as shown in Figure 4 1 Tabie 4 1 Risetime Falltime Settings and Expected Measurement Results Risetime Falltime Averages Specification 1 Specification for the HP 84815A is lt 45 ns Number of Vertical Scale Setting Input Signal as Measured To set up the Peak Power Analyzer a ei 1 Press on the Peak Power Analyzer 2 Select the menu and set the following parameters using the displayed menu a Select highlight channel 3 with the top function key b Turn the channel off with the second function 3 Select the menu and set the following parameter using the displayed menu a Highlight chl ch4 with the top function key b Select ch1 with the second function key c Enter 2 GHz with the knob or the keypad If the keypad is used terminate the entry with the GHz key on the right side of the keypad 4 5 Performance Tests HP 8990A 4 Select the menu and set the following parameters using the displayed menu a Highlight select norm with the first function key b Highlight 1 with the of screens function key c Highlight grid with the fifth function key d Highlight on with the connect dots function key 5 Select the menu and set the following parameters using the displayed menu a Highlight 1 with the top function key b Highlight low with the bandwidth function key To verify the 5 ns risetime 1 Make an average
159. ted m Select the menu key Press the top softkey until waveform highlighted u Press the nonvolatile softkey until m3 is highlighted m Press the source softkey until chan 1 is highlighted Press the store softkey The currently displayed waveform is in nonvolatile memory m3 The remainder of this exercise demonstrates how to recall the stored waveform w Press the display softkey to turn on the m3 display a Press the menu key change the scale of channel 1 This moves the current display so the stored waveform can be viewed The display should look similar to the following figure 3 105 Waveform Memory Menu HP 8990A ap running HAVEFORN NEM Have f ori i nonvalatiie mt 02 SR a4 a a amp a G a display Yoon um t 00006 ms fs shee s Anataat sah 200 us div fine Figure 3 42 Displayed Memory 3 106 Define Measure Menu Introduction to Measurements Note This chapter contains a description of how to use the measurement menu This is a very powerful and encompassing feature By pressing the front panel menu key Define Meas you can access the entire measurement function The minimum triggerable pulse width for channels 2 and 3 is 7 ns Trigger quality for channels 1 and 4 degrades for pulses narrower than 500 ns When making a measurement manual calibration of the Peak Power Analyzer and the peak power sensor is not required The sensor contains an EEPRO
160. terminate the entry with any of the suffix keys Press the fifth function key until grid is highlighted Press connect dots until on is highlighted 4 43 Performance Tests HP 89S0A 4 44 Using the markers to measure delta t 1 Select the menu 2 Press the time markers key until on is highlighted 3 Select the start marker function key 4 Set the start marker large dashed vertical line to the mid screen crossover point on the left side of the displayed signal as shown in Figure 4 12 The knob changes the position of the marker 5 Select the stop marker function key 6 Set the stop marker small dashed vertical line to the mid screen crossover point on the right side of the displayed signal as shown in Figure 4 12 7 Read the delta t from the bottom of the display It should be between 38 7 and 41 3 ns fp running remote talk on markers 7 i 3 B H H H on TOOT time markers iomat off Seer Ew no ae Se fem ee a ee OF Lanete Start marker Inemeriarmeseemall Barsertormerseresdostveesnseunasuna OAO AE EA O E E P 6 90000 5 00 ns diyv stop marker 19 400 ns ampl tine start marker 20 600 ns a i AA deita t 40 000 ns i delta t 25 0000MH Figure 4 12 Mid Screen Crossover HP 8S90A Performance Tests 8 Disconnect the signal generator from channel 2 and connect it to channel 3 9 Repeat the procedure for channel 3 If delta t accuracy fails on eithe
161. the sensor is not placed in a strong electromagnetic field for example against a CRT 3 Calibration of all four channels takes a number of minutes Calibration of an individual channel requires less time 4 As the calibration is performed PASSED FAILED or ABORTED is displayed If the abort key is pressed aborted is displayed the old calibration data is kept if the calibration is aborted HP 8990A Note continue Key Utility Menu 5 If the calibration failed write down the Is and 0s that are displayed The sequence is useful to the service personnel Delay Cal Use the BNC cable HP part number 10503A that is supplied with the Peak Power Analyzer to make the connection from the rear panel AC CAL output Do not use a BNC tee with the cable If the supplied cable is not used the accuracy of the time skew can not be guaranteed The cable is 1 5 metres and has a delay of 5 ns 10 For specified accuracy the sensor s used in delay cal should be the sensor s used for the measurement However if the greatest time accuracy is not needed any sensor with the same cable length 1 5 metres versus 6 metres is generally close enough The following information is especially useful for timebases faster than 50 ns division During the delay cal process cabling which will be connected to channel 2 or 3 during a measurement can be calibrated out Simply include the cabling between the cable supplied wit
162. tion HP 8S90A Table 1 1 Specifications continued General Characteristics continued MEASUREMENT SPEED 3 measurements per second Manual operation 3 65 readings per second over HP IB with no display and not including trigger latency DIMENSIONS Height 194 3 mm 7 65 in Width 422 3 mm 16 62 in Depth 366 0 mm 14 4 in WEIGHT Net Weight 12 8 kg 28 lb Shipping Weight 20 1 kg 44 lb HP 8990A General information Table 1 2 Calculating Overall Power Measurement Accuracy Overall Root Sum of the Squares RSS power measurement uncertainty is obtained by calculating the RSS of the following individual uncertainties INSTRUMENTATION UNCERTAINTY including Noise and Offset 5 5 a Foar X 100 SENSOR CALIBRATION UNCERTAINTY Refer to the peak power sensor Operating Manual for the uncertainty figures MISMATCH UNCERTAINTY 2 x Sensor Reflection Coeff x DUT Reflection Coeff x 100 Refer to the peak power sensor Operating Manual for the reflection coefficients of the sensors Example The source under test has the following characteristics Power Output 10 dBm 100 uW Frequency 14 GHz Source reflection coefficient 14 GHz 0 24 SWR 1 62 HP 84812A Peak Power Sensor Sensor reflection coefficient 14 GHz 0 11 SWR 1 25 Instrumentation Uncertainty including Noise and Offset 5 5 Sow x 100 3 6 Sensor Cal Uncertainty
163. tion process If you press this key the calibration process is terminated with the previous calibration factors intact HP 8990A exit menu Key time null submenu channel Key time Key exit menu Key Utility Menu Pressing this key returns to the Utility menu Time null sets the timing of all channels to correspond to each other This eliminates any time discrepancies between channels and guarantees that channel to channel skew variations are non existent Time null is useful for MANUALLY adjusting any differences in the time domain for example cable length Time null should be run any time a sensor with a different length cable is used For information about eliminating internal skew refer to the instr cal memu and delay cal This selection key allows you to select the channels to be set to each other All channels are set to channel 1 therefore the selections are as follows lto a l to3 a i to4 This field is never displayed in fullbright designating it as an active field however it is always active Pressing this key changes the selection Each time the key is pressed the selection is incremented This is an unlabeled field The time null between the two channels can be set using either of the entry devices The range is 70 ns Pressing this key returns to the Utility menu 3 131 Utility Menu HP 8990A instr cal menu The instr cal menu consists of two calibrations w vertical cal m
164. tors HP IB lierik Connect Coaxial Connector 2 Type N Connector Peak Power Sensor Input Turn on Instructions Turn On Procedure 2 Power up Sequence Intensity Control 2 1 Operator s Checks Self Tests 2 0 24 Procedure 2 Front Panel Checks 2 Equipment ao ee a we ae Se HP IB Address Salsetion ge fn tian ey Operating Environment Bench Operation Rack Mounting Storage and Shipment Environment a y sie E CHE are Packaging 4 4 add cee a kG Tagging for Service i Original Packaging Other Packaging 2 1 2 5 5 7 27 2 7 27 2 7 27 27 2 7 2 8 28 2 8 2 8 2 9 2 10 2 10 2 11 34 2 12 2 12 2 14 2 16 2 16 2 16 217 2 17 217 2 17 2 17 2 17 2 18 Operator s Maintenance Procedures 2 20 Local Operation Introduction 2 3 1 Turn on Instructions D 3 1 Turn On Procedure 000a 3 2 Power up Sequence 3 2 Instrument Preset 3 4 Instrument Overview a 3 7 Front Panel a se 2 a aaa 3 7 System Control a p aaa 3 8 RUN STOP 3 6 cove ee oe 2 i 3 9 SINGLE Se ee Sime a E Co ee ae Ge af ox 3 10 CLEAR DISPLAY 6 4 0002 4 3 10 LOG AL o mos aoa i Oe ho yh Ge ae 5 3 10 HARDCOPY 4 3 6 4 4 4 3 10 OLN Cee ah cea ne eee a pa 3 11 AUTOSCALE aoaaa aaa aa 3 12 RECALDE mogte a ea aa ee 3 14 S
165. toss preset g probe sensor zero Channel Probe 1882 t aji jai gt p anf Ce I i More Figure 3 12 HP 8990A Channel Menu 3 34 HP 8999A Channel Menu er BTCA ALA ALA AAA ALA AAA I A AN Channel Key The top key in the channel menu is for channel selection The key toggles through channels one through four When a channel is selected highlighted in inverse video it can then be turned on with the next key When a channel is turned on the small circle immediately below the channel number is highlighted Note It is possible to have a channel turned on and be viewing it while in the vertical control menu of another channel When making changes ensure you have the proper channel and function selected and be sure you are changing the channel you intend to change When Option 001 Single Sensor Input is installed channel 4 is not useable If an attempt is made to turn channel 4 on the advisory no Baseband assembly found cannot turn on channel is displayed Channels 1 and 4 Vertical scale key The current power per division is displayed with the current units selection The units per division dBm or watts is selected with the display menu When this function is selected either of the entry devices can be used for data entry The range for vertical scaling is 50 nW division to 20 mW division in linear mode and 1 dB division to 5 dB division in log mode Loss entered with the exter
166. ts will be the message not found Threshold settings apply to all user defined front panel measurements This feature is useful when measuring for excessive overshoot or ringing The user can define the measurements test for specific pass fail criteria from the front panel or set the Peak Power Analyzer in the limit test and allow the Peak Power Analyzer to report without supervision If the user defined upper and lower thresholds are placed too close together it is possible the Peak Power Analyzer will not be able to determine the mid point The message not found will be displayed in the measurement factors area Measurements defines more parameters the horizontal test conditions for three specific front panel keypad measurements a Delay n offtime mw pulsewidth When any one of the three measurements is selected the measurement is made on the selected edge count slope HP 8990A Define Measure Menu and transition point The Peak Power Analyzer starts counting edges from the left edge of the screen not at the reference point The selected edge must be displayed If the edge is not displayed the message not found is displayed in the measurement results area below the screen Measurement delay not to be confused with timebase delay see Timebase Menu is useful when measuring source to source delays or measuring time separation on the same source or a different source The front panel delay me
167. tup Peak Power Sensor Cable Electrical Connector E S8 ko ae Se ee aa Checking Sensor Check Source Equipment Setup Checking Bandwidth Equipment Setup 4 8 Checking Offset Accuracy Equipment Set p how oh ot 2 8 ek ee eS 4 9 Checking Channel 1 and Channel 4 Trigger Sensitivity Equipment Setup 4 34 4 10 Checking Channel 2 and Channel 3 Trigger Sensitivity Equipment Setup 4 39 4 11 Checking Delta t Accuracy Equipment Setup ioe veces hcg AJ 4 12 Mid Screen Crossover 2 0 4 44 Contents 15 Tables AAAS SEA ER NOT IE SE ST I i ER PEE TS AGS PTB Contents 16 l 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 3 2 1 2 2 3 1 4 1 4 2 4 3 Specifications Specifications continued Specifications continued Specifications continued 2 Specifications continued Specifications continued Specifications continued Calculating Overall Power Measurement Accuracy A 2 Ao SSE a Recommended Test Fauipment a gy Fuse Ratings and Part Numbers Allowable HP IB Address Codes Preset Default Conditions Risetime Falltime Settings and Expecied Measurement Results Average Power Versus Measured Power Performance Test Record 1 8 1 9 1 10 1 11 1 12 1 13 1 14 1 15 1 16 4 2 3 2 15 3 5 4 5 4 13 4 46 General Information Introduction The HP 8990A Peak Power Analyzer operating and service documentation consists
168. uipment Regd Procedure To set up the test equipment and the Peak Power Analyzer To verify offset accuracy for Channel 2 To verify offset accuracy for Channel 3 Checking Channel 1 and Channel 4 Trigger Sensitivity 0 aoe ee Specification ws eA Description 4 04 Equipment Procedure To set up the seal egumen and the Peak Power Analyzer To measure power with the Peak Power Analyzer To verify internal triggering down to 0 25 of full scale 2 To verify triggering for a 30 dBm signal te see HE wk ae Checking Channel 2 and 3 MiBe Sensitivity 40 6 hoe a aa Specification oaoa Description Equipment ee Procedure To set up the test equipment and the Peak Power Analyzer fe To check Channel 2 and 3 trigger sensitivity from dc to 1 MHz To check Channel 2 and 3 trigger sensitivity from 1 MHz to 100 MHz Checking Delta t Accuracy Specification a Description pi Equipment 4 30 4 30 4 30 4 31 4 31 4 31 4 32 4 34 4 34 4 34 4 35 4 35 4 35 4 36 4 37 4 37 4 39 4 39 4 39 4 40 4 40 4 40 4 40 4 41 4 42 4 42 4 42 4 43 Contents 11 Contents 12 Procedure 55 ih bees oom oe Mee Bee To set up the test equipment and the Peak Power Analyzer Using the markers to measure delta t A Algorithms Introduction amp 4 a aoa 2 amp a 4 Measurement Setup Making Measurements Automatic T
169. ult settings is performed automatically m The show screen is displayed This screen indicates active channel trigger and function information The menu which was active when the Peak Power Analyzer was turned off has been replaced by the show screen RT n i Ezz Intensity Control Once the Peak Power Analyzer has been turned on you may want to set the display intensity to a more comfortable setting Adjust the intensity by turning the DISPLAY INTENSITY control on the rear panel of the Peak Power Analyzer Operator s Checks 2 10 Operator s checks are procedures which are designed to verify proper operation of the Peak Power Analyzer s main functions The checks consist of two procedures Self Tests a Front Panel Checks The self tests verify that most of the Peak Power Analyzer s circuitry is functioning properly HP IB functionality is checked by the HP IB self test The front panel checks assure the user that most front panel features are functioning properly HP 8990A Self Tests Note Installation and Operator s Maintenance Before turning the Peak Power Analyzer on be sure that the Calibrator switch on the rear panel is in the PROTECTED position Running all of the self tests using the test all softkey requires several minutes Instead of running all self tests the individual tests can be run separately Procedure 1 With nothing connected to the Peak Power Analyzer turn the Pe
170. umeric keypad With the numeric keypad terminate data entry using the MHz or GHz keys Two fields are displayed when the selection is made to set the carrier frequencies separately A field is active when it is highlighted Valid entries are 1 MHz to 200 GHz Data is entered using the knob or the numeric keypad With the numeric keypad terminate data entry using the MHz or GHz keys Waveform Math Menu Introduction to the The Waveform Math function defines one and or two Functions functions The functions are used on data that is displayed on screen from any of the four channels or from any of the four waveform memories A function is generated by mathematically manipulating one or two operands with known operations The Peak Power Analyzer uses these mathematical operations m plus m divide m minus m versus only 3 91 Waveform Math Menu HP 8990A Waveform MATH display off on OPERAND Chan 1 4 mem 1 4 OPERAND Chan 1 4 mem in sensitivity ortet Figure 3 36 Waveform Math Menu The vertical sensitivity and offset are adjusted to position the function for best viewing When the function is calculated it can be used in the following manner m displayed m evaluated with the measurement features a stored in memory a output over the HP IB 3 92 HP 8990A Waveform Math Menu Single Sensor Input Option When Option 001 Single Sensor Input is i
171. ve to be used to achieve this minimum triggerable level External triggering through channels 2 and 3 offers a bandwidth of de to 100 MHz Minimum sensitivities are 200 mV from dc to 1 MHz and 500 mV from 1 MHz to 100 MHz Since the Peak Power Analyzer has the option of being triggered internally or externally you may ask the question When do I use external triggering over internal triggering It is hoped that the following list will aid in answering that question u To obtain the specified 5 ns for a risetime or falltime measurement external triggering must be used a When using internal triggering the displayed risetime and falltime may be a function of the signal noise u Internal trigger quality degrades for repetition rates gt 1 MHz Either channel 2 or 3 can be used for external triggering However there is a finite isolation which exists between channels 1 and 2 and channels 3 and 4 Therefore it is recommended when using external triggering trigger from channel 3 when measuring with channel 1 and trigger from channel 2 when measuring with channel 4 HP 8990A Note Trigger Menu A phenomenon common to all triggered sweep oscilloscope type instruments is the appearance under certain conditions of a noise hump at the timebase reference position of the sweep This can occur when wideband noise is displayed with no other signals above the noise and with the internal trigger level set near the highest
172. window and logic trigger delay cal is highlighted m Press start cal and continue when the instructions are displayed ae entra more Key This key accesses the first level utility menu 3 138 Performance Tests EEE BE NS ET NB LOR TCP CS TR ct Introduction The procedures in this section test the electrical performance of the instrument using the warranted specifications as performance standards These tests are suitable for incoming inspection and necessary for calibration All tests can be performed without access to the interior of the instrument Equipment Required Equipment required for the performance tests is listed in table 4 1 Recommended Test Equipment Unless noted otherwise any equipment that satisfies the critical specifications given in the table may be substituted Performance Test Results of the performance tests may be recorded in Record the Performance Test Record The table is located at the end of this chapter The Performance Test Record lists all of the tested specifications and their acceptable limits Results recorded at incoming inspection can be used for comparison in periodic maintenance and troubleshooting and after repairs or adjustments Calibration Cycle This instrument requires periodic verification of performance Under normal use and environmental conditions the instrument should be calibrated annually Normal use is defined to be about 2000 hours of use per year 4 1 Performance
173. wlett Packard s implementation of IEEE Std 488 1978 Digital Interface for Programmable Instrumentation Most functions are remotely programmable HP 8990A General Information Table 1 1 Specifications continued Rear Panel Connectors AC CAL OUTPUT This is a 1 5 kHz square wave used for probe calibration and internal frequency and delay adjustments DC CAL OUTPUT This output is used for vertical calibration of the Peak Power Analyzer TRIGGER OUTPUT CHANNEL 1 TTL level signal corresponding to the internal trigger signal of Channel 1 TRIGGER OUTPUT CHANNEL 4 TTL level signal corresponding to the internal trigger signal of Channel 4 General Characteristics EMI Conducted and radiated interference is within the requirements of CE03 CS01 CS02 of MIL STD 461C It is also within the requirements of VDE 0871 1978 Level B and CISPR Publication 11 1975 with a channel 2 or 3 input level of lt 2 volts ACOUSTIC NOISE EMISSION GERAEUSCHEMISSION LpA lt 70 dB A per ISO 3744 LpA lt 70 dB A nach DIN 45635 pt 1 LpA Operator position 42 dB LpA am Arbeitsplatz 42 dB LpA Bystander position 39 dB LpA fiktiver Arbeitsplatz 39 dB OPERATING TEMPERATURE 0 to 55 C STORAGE TEMPERATURE 40 to 71 C LINE VOLTAGE 90 132 or 198 264 Vac 48 to 66 Hz POWER DISSIPATION 250 VA maximum 1 Based upon type test per ISO 6081 2 Typpruefungsergebnis nach DIN 45635 pt 19 General Informa
174. y Texas Hewlett Packard Co Hewlett Packard Co 150 Green Pond Rd 930 E Campbell Rd Rockaway NJ 07866 Richardson TX 75081 201 586 5400 214 231 6101 EUROPEAN FIELD OPERATIONS Headquarters France Germany Hewlett Packard S A Hewlett Packard France Hewlett Packard GmbH 150 Route du Nant d Avril 1 Avenue Du Canada Hewlett Packard Strasse 1217 Meyrin 2 Geneva Zone D Activite De Courtaboeuf 61352 Bad Homburg v d H Switzerland F 91947 Les Ulis Cedex Germany 41 22 780 8111 France 49 6172 16 0 33 1 69 82 60 60 Great Britain Hewlett Packard Ltd Eskdale Road Winnersh Triangle Wokingham Berkshire RG41 5DZ England 44 734 696622 Hewieti Packard Sales and Service Offices INTERCON FIELD OPERATIONS Headquarters Australia Canada Hewlett Packard Company Hewlett Packard Australia Ltd Hewlett Packard Canada Ltd 3495 Deer Creek Road 31 41 Joseph Street 17500 South Service Road Palo Alto California USA Blackburn Victoria 3130 Trans Canada Highway 94304 1316 61 3 895 2895 Kirkland Quebec H9J 2X8 415 857 5027 Canada 514 697 4232 China Japan Singapore China Hewlett Packard Company Hewlett Packard Japan Ltd Hewlett Packard Singapore Pte Ltd 38 Bet San Huan X1 Road 1 27 15 Yabe Sagamihara 150 Beach Road Shuang Yu Shu Kanagawa 229 Japan 7 29 00 Gateway West Hai Dian District 81 427 59 1311 Singapore 0718 Beijing China 65 291 9088 86 1 256 6888 Taiwan Hewlett Packard Taiwa
175. y down power up This resets many critical parameters to known values and assures that erroneous test failures do not occur A key down power up is performed by holding down any key and turning the Peak Power Analyzer off then back on UTILITY SELFTEST MENU H Ii keyboard ert systom nonvo protect display aystem nonyvoi tt atl Figure 3 46 Selftest Menu HP 8990A Utility Menu The Peak Power Analyzer self diagnostics and selftests are designed to run operational tests on the following m ram rom m acquisition m miscellaneous SELFTEST MENU rom rom acq misc toop 8935 disp iayl acq system nonvol PASSED System RAM PASSED Non Votatile RAM start test PASSED Display RAM PASSED Protected Non Vojatile RAM PASSED System ROM test alt PASSED Acquisition RAM PASSED Logic Trigger PASSED Timehase PASSED DZA Converter PASSED HPIB PASSED A D Converter to run seiftest disconnect ail inputs sit mens 54501 AWE 7S Figure 3 47 Results of Selftest ram Test The ram test is a multiple selection field The options are a display acquisition m system m unprotected nonvolatile memory 3 125 Utility Menu rom Test acquisition Test miscellaneous Tests 3 126 loop Test start test Key test all Key exit menu Key HP 8990A Two rom tests are available u system m protected nonvolatile memory Four acquisition tests are available m logic trigger A D z timebase a D A
176. y source This trigger mode is versatile and accommodates most complex triggering situations It has the flexibility to select different trigger sources delay times and delay counts and then display various points of the waveform HP 8990A Trigger Menu Trig MENU Delay Trigger trig d auto qualify on Source J when clock when dela is not y present delay trigger on delay trigger on 3 Bl trigger on Figure 3 25 Delay Trigger Menu qualify on Key The qualify on key allows you to select which mode to qualify the trigger on before a delay is defined The options are m edge a pattern m state 3 65 Trigger Menu edge Qualify Option pattern Qualify Option state Qualify Option 3 66 HP 8990A Select the edge qualifier and the next two function keys are used to define the parameters The first key is an unlabeled field that selects the channel to be the source The second key is the slope selection When the pattern trigger option is selected the next function key defines the qualifier pattern Defining a pattern is the same as in Pattern Trigger mode m Highlight the bit to be changed by pressing the function key m Change the bit by rotating the knob After selecting through all four bits the active field is changed to the condition field This field sets conditions as in Pattern Trigger mode m when entered when exited x when present gt when present lt E range These
177. yzer to 1 volt a Press the fourth function key b Set the offset using the keypad or the knob Verify that the level displayed on the Peak Power Analyzer is within 0 4 divisions of the center horizontal line as calculated from the vertical sensitivity and offset Select a scale of 200 mV division on the Peak Power Analyzer Set the Peak Power Analyzer offset to 2 volts Adjust the power supply to 2 00 volts Verify that the level displayed on the Analyzer is within 0 4 divisions of the center horizontal line The performance test is temperature sensitive Test limits given in this procedure assume that the instrument is operating at the temperature at which it was calibrated If the operating temperature is not the same as the calibration temperature the error is increased by 0 075 divisions degree C change 0 15 divisions degree C change on 5 mV division range To verify offset accuracy for Channel 3 1 Disconnect the input to CH 2 and connect it to CH 3 2 Turn channel 3 on and channel 2 off 3 Set the scale for channel 3 to 200 mV division 4 5 Verify that the Peak Power Analyzer signal level Set the offset for channel 3 to 2 volts displayed is within 0 4 divisions of the center horizontal line HP 8990A Performance Tests 6 Change the power supply to 1 00 volt 7 Set the Peak Power Analyzer scale to 100 mV div 8 Set the offset to 1 volt 9 Verify that the level displaye

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