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HP 8671B User's Manual

1. 3 27 Operation HP 8671B OPERATOR S CHECKS HP IB Checks contd HP 9826A BASIC HP S836A BASIC Description HP 85B BASIC Send the Remote message REMOTE 719 10 REMOTE 719 Send a Data message to set the status OUTPUT 719 20 OUTPUT 719 byte M070 M070 Address the CW Generator to talk and ENTER 719 30 V 0 store its output in variable V using B V 40 ENTER 719 i using B V Display the value of V DISP Y 50 DISP V 60 END OPERATOR S Check that the CW Generators REMOTE annunciator is on The controller should RESPONSE display 28 Receiving the Clear Message NOTE This check determines whether the CW Generator responds properly to the Clear message This Check assumes that the CW Generator is in remote mode HP 9826A BASIC Description HP 858 BASIC HP 9836A BASIC Send a Data message to initialize the Output 719 Output 719 CW Generator P18 W0Z173075 PL8W0Z173075 OPERATOR S Check that the CW Generator is set to 18000 MHz XTAL ALC mode and RF RESPONSE OUTPUT ON Send the Clear message CLEAR 719 CLEAR 719 OPERATOR S Check that the CW Generator is set to 3000 MHz INT ALC mode and RF OUTPUT RESPONSE OFF Receiving the Abort Message NOTE This check determines whether the CW Generator becomes unaddressed when it receives the Abort message This check assumes the CW Generator is in remote mode and at a frequency other than 2000 MHz
2. 22 70 dBm 22 70 dBm 23 05 dBm 23 05 dBm 23 05 dBm 8 00 dBm 7 15 dBm 7 75 dBm 7 75 dBm 7 75 dBm 7 75 dBm 7 75 dBm 7 50 dBm 7 50 dBm 7 50 dBm 7 15 dBm 7 15 dBm 7 15 dBm 17 55 dBm 17 55 dBm 17 55 dBm 17 30 dBm 17 30 dBm 17 80 dBm 16 95 dBm 16 95 dBm 16 95 dBm 4 15 Performance Tests HP 8671B PERFORMANCE TESTS 4 10 LOW LEVEL ACCURACY TEST Electrical Characteristics Perfermance Limits Conditiens RE OUTPUT Remote Programming Absolute Level Accuracy Specification 2 0 6 2 GHz arity temperature flatness attenuator accuracy and measurement uncertainty 15 to 35 C 1 90 dB 30 dB output level range 1 90 dB plus 0 3 dB per lt 30 dB output level range 10 dB step 6 2 12 4 GHz 2 15 dB 80 dB output level range 2 15 dB plus 3 dB per lt 30 dB output level range 10 dB step 12 4 18 0 GHz 2 40 30 dB output level range 2 40 dB plus 0 4 dB per lt 30 dB output level range 10 dB step l Manual Absolute Add 0 75 dB to remote pro Absolute level accuracy Level Accuracy gramming absolute level specifications include accuracy allowances for detector line Description This test checks absolute level accuracy between 30 dBm and 110 dBm An IF signal is calibrated to the spectrum analyzer by measuring the CW Generator s RF o
3. 4 12 HARMONICS SUBHARMONICS amp MULTIPLES TEST Electrical Characteristics Performance Limits Conditions SPECTRAL PURITY lt 25 dBe Harmonics Subharmonics and lt 25 dBe Multiples Thereof Specification Output level 8 dBm Output level 8 dBm Description This test checks the amplitude of various harmonics of the CW Generator s output signal in the multiplied frequency bands gt 6 2 GHz subharmonics and multiples harmonics of the internal fundamental signal are also checked for specific levels Reasonable care must be taken to ensure that the harmonics are not being generated by the spectrum analyzer Equipment Spectrum Analyzer ccc cee ences HP 8566B Procedure 1 Connect the CW Generator RF OUTPUT to the input of the spectrum analyzer as shown in Figure 4 9 SPECTRUM ANALYZER RF OUTPUT 50Q INPUT APC 3 5 CABLE Figure 4 9 Harmonics Subharmonics and Multiples Test Setup 2 Tune the CW Generator to 4 000 000 MHz and output level of 8 dBm 3 Set the spectrum analyzer controls to display the fundamental signal Set the resolution bandwidth to 10 kHz and the input attenuation to 40 dB Adjust the log reference level to set the displayed signal at the top graticule line of the display 4 Tune the CW Generator to 2 000 000 MHz The second harmonic now displayed at 4 000 000 MHz should be greater than 25 dB below the reference lt 25 dBe 5 Repeat steps 2 thr
4. 40 dB and 50 dB in step 8 Record the output level readings in Table 4 2 Note the CW Generator s signal level at 50 dBm on the spectrum analyzer display Remove the 20 dB attenuator set the spectrum analyzer reference level 20 dB higher and adjust the spectrum analyzer to bring the peak of the IF sig nal back to the same reference level Repeat steps 8 through 10 with CW Generator settings of 60 dB through 90 dB Record the output level readings in Table 4 2 Note the CW Generator s level at 90 dBm on the spectrum analyzer display This will be the reference in step 15 Connect the 20 dB Preamplifier as shown in Figure 4 6 Set the spectrum ana lyzer IF sensitivity 20 dB higher and set the vertical sensitivity to bring the signal back to the reference level noted in step 14 Repeat steps 8 through 10 with CW Generator range settings of 100 dB and 110 dB Record the output level readings in Table 4 2 Repeat steps 3 through 16 for CW Generator frequencies of 10 GHz and 18 GHz Record the output level readings in Table 4 2 HP 8671B Performance Tests PERFORMANCE TESTS LOW LEVEL ACCURACY TEST cont d Table 4 2 Low Level Accuracy Test Record wm Actuai Max 2 0 GHz 80 dBm 40 dBm 50 dBm 60 dBm 70 dBm 80 dBm 90 dBm 100 dBm 110 dBm 10 0 GHz 30 dBm 40 dBm 50 dBm 60 dBm 70 dBm 80 dBm 90 dBm 100 dBm 110 dBm 18 0 GHz 30 dBm 40 dBm
5. Example 3 12 The Synthesized CW Generator is calibrated over a wide range of output power levels from 8 dBm to 120 dBm The output level is set with a RANGE selector and a VERNIER control The output level is the sum of the settings of these two controls The RANGE selector varies the output level in 10 dB steps The selected range 10 dB to 110 dB is digitally displayed in the RANGE display This display indicates the selected range in both local and remote modes Output level ranges of 0 dB to 110 dB are programmable with the range program code The 10 dB rangeis selected using the ALC program code The VERNIER knob continuously varies the output level in the 0 dB range from 10 to 3 dBm The VERNIER setting is indicated by the front panel meter In local mode the VERNIER can be varied continuously over the full 18 dB range In remote mode the VERNIER can be programmed in fourteen 1 dB steps from 10 dBm to 3 dB Because the VERNIER can be controlled over greater than 10 dB in both local and remote mode itis possible to overlap range settings by 3 dB This is useful in appli cations where the ability to vary the output power continuously about a given level is critical To set the output level to any desired value 1 Set the CW Generator ALC mode to internal INT 2 Setthe OUTPUT LEVEL RANGE to within 3 to 10 dB of the desired output level For example for a 56 dBm output level choose the 50 dB range
6. 19 20 2i Measure the amplitude recovery time The measurement is the time from the left graticule of the display to the last time the IF signal amplitude is outside of the reference points noted in step 13 If necessary adjust the oscilloscope triggering to obtain a display similar to that shown in Figure 4 4 lt 15 ms Record Results for Step 17 lt 15 ms Record Results for Step 20 lt 15 ms 3dB Reference LL 3dB Reference 116 mv division Figure 4 4 Amplitude Recovery Measurement Waveform Set the local oscillator to 12 300 002 MHz Modify lines 20 130 and 150 of the program as follows Frequency 12 3 GHz 20 QUTPUT 719s PL2S0000071 Frequency 6 2 GHz 130 QUTRPUT Fi 620000071 7 Frequency 12 3 GHz 150 OUTPUT 73 P1e 300000z1 Repeat steps 11 through 14 using the modified programs The amplitude recovery time will be measured for the 2 kHz resolution band Set the local oscillator to 18 000 008 GHz Modify lines 20 180 and 150 of the program as follows Frequency 18 0 GHz 2G OUTPUT FIF PL1Sdaosoa zi Frequency 12 4 GHz 130 GUTPUT 7151230000071 n Frequency 18 0 GHz 150 OUTPUT 7 P1L80gggaz Repeat steps 11 through 14 using the modified program The amplitude recovery time will be measured for the 3 kHz resolution band Disconnect the frequency reference from the rear panel and replace the jumper Set the switch to INT 4 10 HP 8671B Performance Tests PERFORMANCE TES
7. 3 28 HD 8671B Operation OPERATOR S CHECKS HP IB Checks cont d HP 9826A BASIC Description HP 85B BASIC HP 9836A BASIC ee E rele Address the CW Generator to listen OUTPUT 719 OUTPUT 719 and send part of a frequency message A2000 1 l A2000 Send the Abort message unaddressing ABORTIO 7 ABORT 7 the CW Generator from listening Address the controller to talk The CW SEND 7 MTA SEND 7 MTA Generator is not addressed to listen Attempt to execute the previous OUTPUT 7 Zi OUTPUT 7 ZL frequency command by sending the frequency execute command OPERATOR S Check that the CW Generator does not display 2000 MHz output frequency If the RESPONSE controller is an HP 9826A or 9836A press the CLR I O key to continue the checks Status Byte Message NOTE This check determines whether the CW Generator sends the Status Byte message This check assumes that the Clear message has been sent Description HP 85B BASIC Ma Gon Send the Serial Poll message to the SPOLL 719 SPOLL 719 CW Generator causing it to send the Status Byte message Display the value of the status byte OPERATOR S Check that the controller s display reads 28 RESPONSE Require Service Message NOTE This check determines whether the CW Generator can issue the Require Service message set the SRQ bus control line true This check can be performed in either te local or remote mode Description H
8. 714 279 8620 Spectrum Analyzer Frequency Range 100 kHz to 22 GHz Frequency Span Division 2 kHz minimum Amplitude Range 10 to 90 dBm Noise Sideband gt 75 dB down 30 kHz from signal at 1 kHz resolution bandwidth Resolution Bandwidth 30 Hz to 300 kHz Sweep Oscillator Center Frequency 150 to 200 MHz Center Frequency Resolution 0 1 MHz Test Oscillator Level 0 to 3V into 500 or 38000 Range 60 Hz to 10 kHz 1 10 HP 8671B Installation SECTION Il INSTALLATION 2 1 INTRODUCTION This section provides the information needed to install the CW Generator Included is informa tion pertinent to initial inspection power require ments line voltage selection power cables inter connection environment instrument mounting storage and shipment 2 2 INITIAL INSPECTION WARNING To avoid hazardous electrical shock do not perform electrical tests when there are signs of shipping damage to any portion of the outer enclosure covers panels meters 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 instrument has been checked mechani cally and electrically The contents of the ship ment should be as shown in Figure 1 1 Procedures for checking electrical performance are given in Section IV H the content
9. WSs 104 70 dBm 18 0 GHz 30 dBm 33 45dBm aa 26 55 dBm 40 dBm 43 85 dBm gt 36 15 dBm 50 dBm 54 25 dBm n 45 75 dBm 60 dBm 64 65 dBm 55 35 dBm 70 dBm 75 05 dBm 64 95 dBm 80 dBm 85 45 dBm 74 55 dBm 90 dBm 95 95dBm ss 84 15 dBm 100 dBm 106 35 dBm __ 93 75 dBm 110 dBm 107 75dBm 108 35 dBm OUTPUT LEVEL SWITCHING TIME HARMONICS SUBHARMONICS AND MULTIPLES Harmonic or Fundamental Subharmonis 2 000000 GHz 4 000000 GHz 2f 4 000000 GHz 8 000000 GHz 2f 6 000000 GHz 12 000000 GHz 2f 4 4 HP 8671B Performance Tests Table 4 4 Performance Test Record 5 of 6 HARMONICS SUBHARMONICS AND MULTIPLES cont d Fundamental 8 000 000 GHz 8 000 000 GHz 10 000 000 GHz 10 000 000 GHz 11 000 000 GHz 11 000 000 GHz 14 000 000 GHz 14 000 000 GHz 16 000 000 GHz 16 000 000 GHz 18 000 000 GHz 18 000 000 GHz Harmonic or Subharmonic 16 000 000 GHz 2f 4 000 000 GHz 1 2f 20 000 000 GHz 2f 5 000 000 GHz 1 2f 22 000 000 GHz 2f 5 500 000 GHz 1 2f 4 666 667 GHz 1 3f 9 333 333 GHz 2 3f 5 333 333 GHz 1 3f 10 666 667 GHz 2 3f 6 000 000 GHz 1 3f 12 000 000 GHz 2 3f NON HARMONICALLY RELATED SPURIOUS SIGNALS CW AND AM MODES Carrier Spurious Signal Spurious Signal Fraquency Frequency Level 2 0 to 6 2 GHz 3 000 MHz POWER LINE RELATED SPURIOUS SIGNALS Offse
10. 0 dBm The smaller signal represents 3 dBm and the larger signal represents 3 dBm HP 8671B Performance Tests PERFORMANCE TESTS FREQUENCY SWITCHING TIME TEST contd Procedure contd ue 7 U 50 gi YQ LQG CLEAR 719 Frequency 6 1 GHz OUTPUT 7193 Abr 0000021 FOR A TO 106 Level 3 dBm GUTPUT 719 TK 00071 Parea TE LIQ EL Oscilloscope NEXT X FOR Yet TO 100 OUTPUT Frees KUE U ZI Level 3 dBm NEXT Y GOTO U END 12 Set the top of the displayed signal to a convenient reference near the center of the display Note the two levels for reference The measurement will be deter mined by the time required before the amplitude of the IF signal stays between these two levels 13 Press the pause key on the controller Enter and run the following program Run the program by typing RUN 110 and pressing the EXECUTE key END LINE for the HP 85 2 0 GHz 0 dBm internal ALC 410 GQUTPUT 719s 42000000Z103071 Controller talk CW generator listen 120 SEND 7 MTA LISTEN 19 Frequency 2 1 GHz 30 OUTPUT 7 agigggegeai aee a 5 for HP 85B 5 ms 160 WALT 003 Frequency 6 1 GHz Tag OUTPUT 73 4S 100000zg 160 WATT 7 700 for HP 956 700 ms 170 OQUTPUT 73 21 Change frequency 180 WALT 09 a BD for HP 85B 50 ms 1970 GOTO 130 700 END nnt 4 9 Performance Tests HP 8671B PERFORMANCE TESTS FREQUENCY SWITCHING TIME TEST cont d Procedure 14 contd 15 16 17 18
11. 3 Adjustthe OUTPUT LEVEL VERNIER setting until the sum of the range display and the meter is equal to the desired output level Some output levels may be set using either of two adjacent ranges Either range may be used For example 3 dBm may be set with a0 dB range and 3 dBm VERNIER setting or a 10 dB range and 7 dBm VERNIER setting Setting output levels above 8 dBm may cause an ALC unleveled condition due to insufficient power available The meter will indicate the actual power available when the unleveled condition occurs The0dBto 110 dB ranges and the VERNIER setting are programmed with the output level program codes The VERNIER setting is programmed in 1 dB steps from 10 dBm to 3 dBm The range is programmed in 10 dB steps from 0 dB to 110 dB The 10 dB range is programmed by setting RANGE to 0 dBm and ALC to 10 dB When switching from local to remote mode the VERNIER is reset to 10 dB and the range remains unchanged To set the output level to 3 dBm Local Set RANGE to 0 dB and VERNIER to 3 dBm Or Set RANGE 10 dB and VERNIER to 7 dBm HP 8671B Operation Detailed Operating Instructions LEVEL CONTROL contd Example KOLO Contd PE Kat Argument for VERNIER 3 dBm Code for VERNIER Argument for RANGE 0 dB _ _ Code for RANGE KOOL 03 LL Argument for ALC INT 10 dB Range i Code for ALC Argument for VERNIER 7 dBm Code for VERN
12. 3 dB When switching within of final level after switching the same frequency frequency resolution range Description This test measures the frequency switching speed The CW Generator is remotely programmed to continuously switch between two frequencies Its output is mixed with a local oscillator whose output frequency is set to 1 kHz above the second or destination frequency The difference frequency IF is displayed on an oscilloscope Frequency switching speed is first measured in the CW Generator s base band 2 0 6 2 GHz using an IF frequency of 1 kHz which is the specified resolution for the base band As the unit under test is switched from the starting frequency to the destination frequency the oscilloscope is triggered by the HP IB controller As the CW Generator output changes between the two programmed frequencies the IF signal will pass through zero This will generate a phase reversal as shown in Figure 4 3 The last phase change of the IF frequency is the point that the frequency of the unit under test is within the specified resolution The amplitude recovery time is tested using the same measurement setup The 3 dB amplitude points of the IF signal are calibrated on the oscilloscope display and the amplitude recovery time is tested to ensure that the IF level is within 3 dB of the final level see Figure 4 4 The amplitude recovery time is only specified for frequency changes within the same frequency resolution
13. 50 dBm 60 dBm 70 dBm 80 dBm 90 dBm 100 dBm 110 dBm 32 65 dBm 42 95 dBm 53 25 dBm 63 55 dBm 73 85 dBm 84 15 dBm 94 45 dBm 104 75 dBm 115 05 dBm 32 90 dBm 43 20 dBm 53 50 dBm 63 80 dBm t 74 10 dBm 84 40 dBm 94 70 dBm 105 00 dBm 105 30 dBm 33 45 dBm 43 85 dBm 54 25 dBm 64 65 dBm 75 05 dBm 85 45 dBm 95 95 dBm 106 35 dBm 107 75 dBm 27 35 dBm 37 05 dBm 46 75 dBm 56 45 dBm 66 15 dBm 75 85 dBm 85 55 dBm 95 25 dBm 104 95 dBm 27 10 dBm 36 80 dBm 46 50 dBm 56 20 dBm 65 90 dBm 75 60 dBm 85 30 dBm 95 00 dBm 104 70 dBm 26 55 dBm 36 15 dBm 45 75 dBm 55 35 dBm 64 95 dBm 74 55 dBm 84 15 dBm 93 75 dBm 103 35 dBm 4 19 Performance Tests HP 8671B PERFORMANCE TESTS 4 11 OUTPUT LEVEL SWITCHING TIME TEST Specification Less than 20 ms to be within 1 dB of the final level Description This test measures the output level switching speed The measuring system is set up to trigger the oscilloscope when the unit under test has finished accepting the output level data from the controller The R F output is detected and coupled to the oscillo scope s vertical input The time to complete switching which includes settling time is viewed on the oscilloscope display To HP 18 CONTROLLER E ke EXTERNAL i TRIGGER
14. Frequency programmed out of range 2 Not phase locked with RF output on 3 RF power level uncalibrated LVL UNCAL with RF power on The CW Generator can send a Require Service message in either the local or remote mode and whether or not addressed It sends the message by setting the Service Request SRQ bus line true Once the CW Generator is addressed to talk the RQS bit is latched even though CW Generator s need for service may have changed 3 35 Sending the Status Byte Message After receiving a Serial Poll Enable bus com mand SPE and when addressed to talk the CW Generator sends a Status Byte message The mes sage consists of one 8 bit byte which corresponds to the pattern shown in Table 3 4 Programming Quick Reference Guide 3 36 Sending the Status Bit Message The CW Generator sends the Status Bit message in response to the Parallel Poll Enable PPE bus command whether or not it is addressed to talk If the CW Generator is sending the Require Ser vice message it will set its assigned status bit true The data line that the parallel poll is assigned to respond on and the sense active high or active low can be set from switches located inside the instrument The selection procedure is described in Section IT 3 37 Receiving the Abort Message The Abort message is the means by which the controller sets the Interface Clear IFC bus con trol line true When the Abort message is received the CW
15. 00 dBm 12 GHz 1 00 dBm E 5 00 dBm 14 GHz 0 75 dBm sities 5 25 dBm 16 GHz 0 75 dBm Tenu 5 25 dBm 18 GHz 0 75 dBm Zann 5 25 dBm 0 dBm 0 dB range 2 GHz 1 75 dBm nat 1 75 dBm 4 GHz 1 75 dBm E Serer i 1 75 dBm 6 GHz 1 75 dBm a eet 1 75 dBm 8 GHz 2 00 dBm Sather 2 00 dBm 4 39 Performance Tests Para No 4 8 4 40 Table 4 4 Performance Test Record 3 of 6 Test FLATNESS TEST cont d High Level Accuracy cont d OUTPUT LEVEL HIGH LEVEL ACCURACY AND 0 dBm 0 dB range contd 10 GHz 5 dBm 0 dB range 10 dBm 0 dB range 10 dBm 10 dB range 20 dBm 20 dB range 12 GHz 14 GHz 16 GHz 18 GHz 2 GHz 4 GHz 6 GHz 8 GHz 10 GHz 12 GHz 14 GHz 16 GHz 18 GHz 2 GHz 4 GHz 6 GHz 8 GHz 10 GHz 12 GHz 14 GHz 16 GHz 18 GHz 2 GHz 4 GHz 6 GHz 8 GHz 10 GHz 12 GHz 14 GHz 16 GHz 18 GHz 2 GHz 4 GHz 6 GHz 8 GHz 10 GHz 12 GHz 14 GHz 16 GHz 18 GHz 2 00 dBm 2 00 dBm 2 25 dBm 2 25 dBm 2 25 dBm 6 75 dBm 6 75 dBm 6 75 dBm 7 00 dBm 7 00 dBm 7 00 dBm 7 25 dBm 7 25 dBm 7 25 dBm 11 75 dBm 11 75 dBm 11 75 dBm 12 00 dBm 12 00 dBm 12 00 dBm 12 25 dBm 12 25 dBm 12 25 dBm 12 25 dBm 12 25 dBm 12 25 dBm 12 50 dBm 12 50 dBm 12 50 dBm 12 85 dBm 12 85 dBm 12 85 dBm 22 45 dBm 22 45 dBm 22 45 dBm 22 70 dBm 22 70 dBm 22 70 d
16. 000 000 MHz Sioa 86 06 dB oe 100 dBe 4 35 Performance Tests HP 8671B PERFORMANCE TESTS ttt nn 4 16 INTERNAL TIME BASE AGING RATE Specification Electrical Characteristics Performance Limits Conditions FREQUENCY Reference Oscillator Frequency After a 10 day warmup Aging Rate lt 5 x 107 0 day typically 24 hours in a normal operating environment Accuracy and Stability Same as reference oscillator Description A reference signal from the CW Generator 10 MHz OUT is connected to the oscil loscope s vertical input A frequency standard with long term stability greater than 1 X 10 is connected to the trigger input The time required for a specific phase changeis measured immediately and after a period of time The aging rate is inversely propor tional to the absolute value of the difference in the measured times Equipment Frequency Standard HP 5065A Oscilloscope 55 bocce Sod acon S task veuneanees HP 1980B NOTE Be sure the CW Generator has had 10 days to warm up before beginning this test If the CW Generator was disconnected from the power line for less than 24 hours only a 24 hour warm up is needed Procedure 1 Set the rear panel FREQ REFERENCE INT EXT switch to the INT position 2 Connect the equipment as shown in Figure 4 13 FREQUENCY STANDARD HP 8671B SYNTHESIZED CW GENERATOR OSCILLOSCOPE SEQ VERTICAL INPUT TRIGGER INPUT OUTPUT Figure 4 13
17. 1 Specifications 3 of 3 i Electrical Characteristics Performance Limits Conditions P aS TT RF OUTPUT cont Manual Absolute Level Add 0 75 dB to remote Absolute level accuracy specifica Accuracy programming absolute tions include allowances for detec level accuracy tor linearity temperature flatness attenuator accuracy and measurement uncertainty Remote Programming Output 1dB Level Resolution Flatness total variation 0 dBm Range 15 C to 35 C 1 50 dB 2 0 to 6 2 GHz 2 00 dB 2 0 to 12 4 GHz 2 50 dB 2 0 to 18 0 GHz Output Leveling Switching lt 20 ms Time to be within 1 dB of final level REMOTE OPERATION Frequency Programmable over the full range with the same resolution as manual mode Output Level Programmable in 1 dB steps 8 to 120 dBm plus 5 dB of overrange RF Output Programmable to either ON or OFF ALC Programmable for internal crystal diode or power meter leveling Interface Function Codes SH1 AH1 T6 TEO L4 LEO SR1 RL2 PP2 DC1 DTO and CO GENERAL Operating Temperature 0 to 55 C see note at the beginning of this table Power 100 120 220 or 240V 5 10 48 66 Hz 300 VA maximum E M 1 Conducted and radiated interference is within the requirements of MIL I 6181D Net Weight 27 2 kg 60 lbs Dimensions Height 146 mm 5 7 in Width 425 mm 16 8 in Depth 620 mm 24 4 in For ordering cabinet accessories module sizes are 5 1 4H 1 MW 23D System IT
18. 10 dBm Noise Figure lt 5 dBm Impedance 500 HP 8447A Amplifier Frequency 100 kHz HP 8447D and HP 8447E 40 dB Gain 45 5 dB or Output Power gt 10 dBm HP 8447F Impedance 500 Probe 10 1 Must be compatible with the oscilloscope HP 10017A A Signal Generator Output Level 5 to 20 dBm at 240 MHz HP 8640B or HP 8340A Spectrum Analyzer Frequency Range 20 Hz to 300 kHz HP 8556A 8552B 141T A with Tracking Frequency Span Division 20 Hz minimum Generator Noise Sidebands gt 90 dB below CW signal 3 kHz offset 100 Hz IF bandwidth Input Level Range 10 to 60 dBm Log Reference Control 70 dB dynamic range in 10 dB steps Accuracy 0 2 dB General Information HP 8671B Table 1 3 Recommended Test Equipment 3 of 3 3 Recommended Instrument Critical Specificatiens Model we Spectrum Analyzer Frequency Range 5 Hz to 50 kHz HP 3580A P T Resolution Bandwidth 1 Hz minimum HP 8566B P A Frequency Span Division 5 Hz to 500 Hz Amplitude Range 0 to 70 dB HP 86222B 8620C A or Sweep Range 10 and 200 MHz HP 8340A Test Coupler Adapter See YTM Adjustments in Section V Locally fabricated HP 3335A C Operator s Check D Performance Tests A Adjustments T Troubleshooting RHG Electronics Laboratory Inc 161 East Industry Court Deer Park NY 11729 Tel 516 242 1100 TWX 510 227 6083 California Instruments 5150 Convoy Street San Diego CA 92111 Tel
19. 2 006 668 2 007 779 2 008 890 2 010 000 2090 001 2 280 001 2 470 001 2 660 001 2 850 001 3 040 001 3 230 001 3 420 001 3 610 001 3 800 001 3 990 001 4 180 001 4 370 001 4 560 001 4 750 001 4 940 001 5 130 001 5 320 001 5510 001 5 700 001 5 900 001 6 100 001 HP 8671B Performance Tests Table 4 4 Performance Test Record 2 of 6 Para Test No tin Actual Max FREQUENCY SWITCHING TIME TEST Frequency Swiiching 18 GHz to 2 1 GHz 2 1 GHz to 18 GHz Amplitude Recovery 2 1 to 6 1 GHz 1 kHz resolution band 6 2 to 12 8 GHz 2 kHz resolution band 12 4 to 18 0 GHz 3 kHz resolution band 4 9 OUTPUT LEVEL KIGH LEVEL ACCURACY AND FLATNESS TEST Output Levei Frequency and Power at Minimum Power Point 2 0 18 0 GHz Frequency Minimum power 8 dBm Level Flatness total variation 2 0 6 2 GHz 1 50 dB 2 0 12 4 GHz 2 00 dB 2 0 18 0 GHz 2 50 dB High Level Accuracy 8 dBm 10 dB range 2 GHz 6 25 dBm Sees 9 75 dBm 4 GHz 6 25 dBm se ee 9 75 dBm 6 GHz 6 25 dBm area eee 9 75 dBm 8 GHz 6 00 dBm Sareea tee 10 00 dBm 10 GHz 6 00 dBm eee 10 00 dBm 12 GHz 6 00 dBm Bae eee 10 00 dBm 14 GHz 5 75 dBm Se e 10 25 dBm 16 GHz 5 75 dBm eae nee ee 10 25 dBm 18 GHz 5 75 dBm K 10 25 dBm 3 dBm 10 dB range 2 GHz 1 25 dBm ee 4 75 dBm 4 GHz 1 25 dBm e e ER 4 75 dBm 6 GHz 1 25 dBm inet 4 75 dBm 8 GHz 1 00 dBm bee ae 5 00 dBm 10 GHz 1 00 dBm meee 5
20. 6 2 GHz 6 2 12 4 GHz 12 4 18 0 GHz lt 25 dBc lt 70 dBe Dd dBc lt 60 dBc lt 50 dBc lt 60 dBe lt 65 dBe lt 44 dBe lt 54 dBe lt 59 dBe lt 40 dBe lt 50 dBe lt 55 dBe 8 dBm to 120 dBm 1 00 dB 1 00 dB 1 50 dB 1 70 dB 1 90 dB 1 90 dB amp 0 3 dB per 10 dB step 1 25 dB 1 25 dB 1 75 dB 1 95 dB 2 15 dB 2 15 dB amp 0 3 dB per 10 dB step 1 50 dB 1 50 dB 2 10 dB 2 30 dB 2 40 dB 2 40 dB amp 0 4 dB per 10 dB step At 8 dBm 2 0 6 2 GHz 6 2 12 4 GHz 12 4 18 0 GHz lt 300 Hz offset from carrier 300 Hz to 1 kHz offset from carrier gt 1 kHz offset from carrier lt 300 Hz offset from carrier 300 Hz to 1 kHz offset from carrier gt 1 kHz offset from carrier lt 300 Hz offset from carrier 300 Hz to 1 kHz offset from carrier gt 1 kHz offset from carrier 15 to 385 C 10 dB output level range 0 dB output level range 10 dB output level range 20 dB output level range 30 dB output level range lt 30 dB output level range 10 dB output level range 0 dB output level range 10 dB output level range 20 dB output level range 80 dB output level range lt 80 dB output level range 10 dB output level range 0 dB output level range 10 dB output level range 20 dB output level range 30 dB output level range lt 80 dB output level range General Information HP 8671B Table 1
21. Internal Time Base Aging Rate Test Setup 3 Adjust the oscilloscope controls for a stable display of the 10 MHz CW Generator output 4 36 HP 8671B Performance Tests PERFORMANCE TESTS INTERNAL TIME BASE AGING RATE cont d Procedure 4 cont d 5 6 Measure the time required for a phase change of 360 Record the time T1 in seconds T EE oS Wait for a period of time from 3 to 24 hours and re measure the phase change time Record the period of time between measurements T in hours and the new phase change time T3 in seconds 2 T3 S Calculate the aging rate from the following equation leyele 1 1 j U grias l f Ty T where 1 cycle the phase change reference for the time measurement in this case 360 f CW Generator s reference output frequency 10 MHz T specified time for aging rate 24h T initial time measurement s for a 360 1 cycle change To time between measurements h Ts final time measurements for a 360 1 cycle change for example if Ty 351s To 3h Ta 349s then _ ieyele 1 1 24h nomena IE ae 351s sas e 006 10 7 Verify that the aging rate is less than 5 X 10 NOTE If the absolute frequencies of the frequency standard and the CW Generator s reference oscillator are extremely close the measurement time in steps 5 and 6 T and T3 can be reduced by measuring the time required for a phase change
22. R oga seen cee Tae RHG DMS1 18 Variable Frequency AC Power Source 501TC 800T California Instruments Procedure 1 Place the CW Generator on a 2 inch foam pad Connect the equipment as shown in Figure 4 11 NOTE Connect the mixer directly to the local oscillator to avoid any power loss 4 28 HP 8671B Performance Tests PERFORMANCE TESTS POWER LINE RELATED SPURIOUS SIGNALS TEST contd Procedure cont d LOCAL OSCILLATOR HP 86 718 SYNTHES ZED CW _ GENERATOR Figure 4 11 Power Line Related Spurious Signals Test Setup Tune the CW Generator to 3 000 000 MHz and set the output level to 20 dBm Set the local oscillator to 3 000 020 MHz at 7 dBm Set the spectrum analyzer start frequency to 20 kHz resolution bandwidth to 3 Hz Set the spectrum analyzer frequency span per division to 50 Hz Set the spectrum analyzer controls so the peak of the 20 kHz signal is at the top graticule line Verify that the line related spurious signals of the CW Generator do not exceed the values shown below Record the highest spurious signal level in each offset band 2 0 6 2 GHz lt 300 Hz offset 50 dBe 300 Hz 1 kHz offset 60 dBe Set the spectrum analyzer frequency span per division to 500 Hz Measure and record the highest spurious signal level 2 0 6 2 GHz gt 1 kHz offset 65 d Be Tune the CW Generator and the local oscillator to 7 000 000 MHz and 7 000 020 MHz respectively 4 29 Pe
23. dB below the carrier Record the measured level Measured Correction 16 06 dB Actual Level ss lt 72 dBe 19 Tune the CW Generator and the local oscillator to 18 000 000 MHz and 18 000 200 MHz respectively 20 Observe the noise level 1 kHz from the carrier The observed level should be greater than 52 dB below the carrier Record the measured level Measured Correction 16 06 dB Actual Level _ lt 68 dBc 21 Set the spectrum analyzer for a resolution bandwith of 300 Hz and a frequency span per division of 2 kHz Using a 300 Hz bandwidth requires a 26 06 dB correction factor 22 Repeat steps 14 through 20 except observe the noise 10 kHz from the carrier Record the results below Frequency Measured Correction Actual fe a eee 26 06 dB ee eee Aa 6100 000 MHz 12 200 000 MHz 26 06 dB 18 000 000 MHz 26 06 dB 23 Set the spectrum analyzer controls for a resolution bandwidth of 3 kHz and a frequency span per division of 20 kHz Using a3 kHz bandwidth requires a 36 06 dB correction factor e tt ir 4 34 HP 8671B Performance Tests PERFORMANCE TESTS SINGLE SIDEBAND PHASE NOISE TEST cont d Procedure 24 Repeat steps 14 through 20 except observe the noise 10 kHz from the carrier Record cont d the results below Frequency Measured Correction Actual 6100 000 MHz oe ae SOROS OR s l jo 110 dBc 12 200 000 MHz 36 06 dB ___ 100 dBe 18
24. meter to dB Relative Slowly tune to 6 2 GHz in 100 MHz steps and record the maximum and minimum relative power outputs Set the power meter calibration factor appropriate for each frequency Maximum variation should be within 1 5 dB highest point to lowest point Continue to tune to 12 4 GHz Maximum vari ation should be within 2 dB Continue to tune to 18 0 GHz and note level varia tion Maximum variation should be less than 2 5 dB NOTE The specification for power output flatness is not referenced to a par ticular frequency The specification represents the total power varia tion over the entire frequency range 2 0 6 2 GHz Minimum Maximum Total Variation lt 1 50 dB 2 0 12 4 GHz Minimum Maximum Total Variation lt 2 00 dB 4 12 HP 8671B Performance Tests PERFORMANCE TESTS OUTPUT LEVEL HIGH LEVEL ACCURACY AND FLATNESS TEST cont d Procedure 2 0 18 0 GHz Conta Minimum Maximum Total Variation lt 2 50 dB High Level Accuracy Test 7 Connect the power sensor to the power meter Calibrate and zero the power meter in the dBm mode 8 Connect the power sensor to the RF OUTPUT connector of the CW Generator 9 Set the CW Generator frequency to 2 0 GHz and output level to 8 dBm 10 dB range and 2 dBm front panel meter setting 10 Tune the CW Generator in 2 GHz steps from 2 to 18 GHz Set the power meter s calibration factor appropriately and record the power outp
25. of something less than 360 Change I cycle in the formula i e 180 1 2 cycle 90 1 4 cycle Aging Rate lt 5 X 1071 day 4 37 Performance Tests Hewlett Packard Company Mode 8671B Synthesized CW Generator Serial Number Para Ne 4 7 Range MHz Baseband Test i Bands 2 and 3 Test 4 38 arrest peer rere ees om nananet FREQUENCY RANGE AND RESOLUTION TEST 3 000 000 2 000 000 2 000 001 2 001 112 2 002 223 2 003 334 2 004 445 2 005 556 2 006 667 2 007 778 2 008 889 2 009 999 2090 000 2 280 000 2 470 000 2 660 000 2 850 000 3 040 000 3 230 000 3 420 000 3 610 000 3 800 000 3 990 000 4 180 000 4 370 000 4 560 000 4 750 000 4 940 000 5 130 000 5 320 000 5 510 000 5 700 000 5 900 000 6 100 000 10 GHz 2 kHz Resolution 18 GHz 3 kHz Resolution eevee er LLL LAA r ttt per Performance Test Record 1 of 6 Tested by 2 999 999 1 999 999 2 000 000 2 001 111 2 002 222 2 003 333 2 004 444 2 005 555 2 006 666 2 007 777 2 008 888 2 009 998 2089 999 2 279 999 2 469 999 2 659 999 2 849 999 3 039 999 3 229 999 3 419 999 3 609 999 3 799 999 3 989 999 4 179 999 4 369 999 4 559 999 4 749 999 4 939 999 5 129 999 5 319 999 5 509 999 5 699 999 5 899 999 6 099 999 Date n Results Actual ee Sey onno rannan e LT Ses HP 8671B 3 000 001 2 000 001 2 000 002 2 001 113 2 002 224 2 003 335 2 004 446 2 005 557
26. set press the HOLD key to disable the TUNING knob The CW Generator accepts any frequency within its range 2000 000 to 18599 997 MHz to 8 significant digits Above 6 2 GHz the frequency is randomly rounded up or down to be compatible with the 2 kHz or 3 kHz resolution at the programmed frequency The CW Generator ignores spaces commas decimal points carriage returns and line feeds Within the CW Generator frequency information is stored in two separate blocks of four digits each The effects of programming codes on the two internal frequency data blocks are shown in Figure 3 5 One block contains the 10 GHz through 10 MHz frequency digits and the other contains the 1 MHz through 1 kHz digits Programming within one block does not change the other blocks unless it is necessary to round off a frequency above 6 2 GHz The programming codes indicate the most significant digit being programmed The output frequency does not change until the frequency execute command Z1 is received by the CW Generator This command must be sent sometime after the fre quency data has been sent HP 8671B Operation Detailed Operating Instructions FREQUENCY CONTROL contd Example To change frequency from 3000 231 MHz to 3450 001 MHz Local 1 Press the 100 MHz leftmost FREQUENCY RESOLUTION key Adjust TUNING for a frequency of 3400 000 MHz 2 Press the 1 MHz next FREQUENCY RESOLUTION key Adjust TUNING for a frequency of 3450 000 MHz 3
27. steps 3 through 10 except observe the noise 100 Hz from the carrier Record the results below Frequency padla S Actual 6100 000 MHz 26 06 ai 70 dBe 18 000 000 MHz 06dB 0 dBe 12 200 000 MHz 6 06 dB ae 64 dBe 13 For the remainder of this procedure use the high frequency spectrum analyzer Set the spectrum analyzer resolution bandwidth to 30 Hz and frequency span per division to 200 Hz The 30 Hz bandwidth requires 16 06 dB correction 14 Tune the CW Generator and the local oscillator to 6 100 000 MHz and 6 100 200 MHz respectively 4 33 Performance Tests HP 8671B PERFORMANCE TESTS SINGLE SIDEBAND PHASE NOISE TEST cont d Procedure 15 Tune the spectrum analyzer to place the 200 kHz IF signal at the left edge of the cont d display Set the spectrum analyzer controls to place the peak of the signal at the top graticule line Increase the log reference level control to move the peak of the carrier 20 dB above the top graticule line The top graticule line is now 20 dBc 16 Observe the phase noise level 1 kHz from the carrier The observed level should be greater than 62 dB below the carrier Record the measured level Measured Correction 16 06 dB Actual Level ss lt 78 dBe 17 Tune the CW Generator and the local oscillator to 12 200 000 MHz and 12 200 200 MHz respectively 18 Observe the noise level 1 kHz from the carrier The observed level should be greater than 56
28. terminals power cord or sup plied power cord set Any interruption of the protective grounding conductor inside or outside the instrument 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 this instrument prior to energizing either unit Whenever it is likely that the protection has been impaired the instrument must be made inoperative and be secured against any unintended operation If this instrument is to be energized via an auto transformer for voltage reduction make sure the common terminal is connected to neutral that is the grounded side of the mains supply Servicing instructions are for use by service trained personnel only To avoid dangerous elec tric shock do not perform any servicing unless qualified to do so Adjustments described in the manual are per formed with power supplied to the instrument while protective covers are removed Energy avail able at many points may if contacted result in personal injury Capacitors inside the instrument may still be charged even if the instrument has been discon nected from its source of supply For continued protection against fire hazard re place the line fuse s only with 250V fuse s of the same current rating and type f
29. the greater the frequency change per revolution In addition four degrees of coarse to fine tuning can be selected Frequency resolution keys located above the tuning knob select 100 MHz 1 MHz 10 kHz or 1 kHz tuning increments Due to frequency multiplication to generate frequencies above 6 2 GHz the minimum tuning increment resolution is 2 kHz above 6 2 GHz and 3 kHz above 12 4 GHz Once a desired frequency has been set pressing the HOLD key will disable the tuning control and prevent unintentional changes in the frequency The preset key sets the output frequency to 3000 000 MHz for conveniently setting the least significant digits to zeroes When the CW Generator is turned off or the power cable is removed the last frequency setting is stored in battery powered memory When the instrument is powered up the frequency returns to the stored value This feature maintains the frequency setting even after power failures or extended periods without power To set the output frequency to any desired frequency 1 Press PRESET 3 GHz This is not always necessary but it will set the right hand six digits to 0 and may provide a convenient starting point 2 Select the desired tuning increment 100 MHz 1 MHz 10 kHz or 1 kHz by pressing the appropriate FREQUENCY RESOLUTION key and use the TUNING knob to set the frequency digits above the rightmost lighted segment in the fre quency resolution display 3 Once the desired frequency is
30. the status byte when SHI addressed to talk T6 TEO L4 LEO Trigger No The CW Generator does not respond to the Group Execute Trigger GET DTO GET bus command Clear Yes Sets frequency to 3000 000 MHz RF output to off ALC mode to DCL DCH Internal and VERNIER to 10 dBm SDC Remote Yes Remote mode is enabled when the REN bus control line is true REN RLI However remote mode is not entered until the first time the CW Generator is addressed to listen The front panel REMOTE annun ciator lights when the instrument is actually in the remote mode The VERNIER is set to 10 dBm arne T ee Nee Local Yes The CW Generator returns to local mode front panel control The GTL RL2 CW Generator returns to the previous front panel settings except for frequency Local No The CW Generator does not respond to the local lockout command LLO RL2 Lockout Clear Yes The CW Generator returns to local front panel control when the RL2 Lockout REN bus control line goes false Set Local za Peer Sete H bail atta ac Pass No The CW Generator has no controller capability Co Control Take Control S n a Require Yes The CW Generator sets the SRQ bus control line true if one of the SRQ SR1 Service following conditions exists frequency out of range not phase locked with RF output on or RF power level uncalibrated with RF power on Status Yes The CW Generator responds to a Serial Poll Enable SPE bus SPE T5 Byte command by s
31. until the OVEN status annunciator turns off This should occur in 15 minutes or less depending upon how long the CW Generator was disconnected from mains power The OVEN annunciator may flicker off and on temporarily just as the oven stabilization temperature is reached This is normal operation Once the OVEN status annun ciator is off set the LINE switch to ON 5 Set the RF OUTPUT switch to ON Set the FREQ STANDARD INT EXT switch to EXT Verify that the INTERNAL REF OFF and NOT PHASE LOCKED status annunciators turn on Set the switch back to INT The status annunciators shold then turn off Frequency Check The FREQUENCY MHz display and NOT PHASE LOCKED status annunciator are used to check that the internal phase lock loops remain phase locked across their tuning range The actual frequency at the RF OUTPUT connector is not HD 8671B Operation OPERATOR S CHECKS nnn Procedure contra checked However the frequency can be monitored with a microwave frequency contd counter or spectrum analyzer for greater assurance that the CW Generator is operating properly If a frequency counter is to be used to check frequency disconnect the jumper from the rear panel connector A3J10 and connect the frequency counter as shown in Figure 3 7 Set the CW Generator rear panel INT EXT switch to EXT HP 86718 SYNTHESIZED CW GENERATOR COUNTER FREQ FREQ STD STD REAR PANEL OUT RF OUTPUT Figure 3 7 Frequency
32. 1 5 180 001 5 320 001 5 510 001 5 700 001 5 900 001 6 100 001 Bands 2 and 3 Test 9 10 ll 12 14 Tune the CW Generator to 10 000 000 MHz and select 1 kHz tuning resolution Tune the frequency down one increment and verify that the CW Generator frequency display changes to 9 999 998 MHz and the frequency counter reading agrees within one count Tune the frequency up two increments and verify that the CW Generator frequency display changes to 10 000 002 MHz Verify also that the frequency counter reading agrees within one count 10 GHz frequency resolution 2 kHz V Tune the CW Generator to 18 000 000 MHz and select 1 kHz tuning resolution Tune the frequency down one increment and verify that the CW Generator frequency display indicates 17 999 997 MHz and the frequency counter reading agrees within one count Tune the frequency up two increments and verify that the CW Generator frequency display indicates 18 000 003 MHz and the frequency counter reading agrees within one count 18 GHz frequency resolution 3 kHz Disconnect the frequency standard cable and replace the FREQ STANDARD JUMPER between A3J9 and A3J10 Set the INT EXT switch to INT 4 4 HP 8671B Performance Tests PERFORMANCE TESTS 4 8 FREQUENCY SWITCHING TIME TEST Specification Electrical Characteristics Performance Limits SWITCHING TIME Frequency to be within the specified resolution Amplitude to be within
33. 1 Set the CW Generator rear panel INT EXT switch to EXT Remove FREQ STANDARD jumper and connect A3J10 to the 10 MHz frequency standard output of the frequency counter THES ZED COUNTER FREQ FREQ STD STD REAR PANEL OUT Figure 4 1 Frequency Range and Resolution Test Setup Select 1 kHz display resolution on the counter Press the CW Generator s PRESET 8 GHz key and set the output power to 0 dBm 4 Verify that the frequency counter reads 3 000 000 MHz 1 count 2 999 999 MHz _ _ 3 000 001 MHz Set the CW Generator frequency to 2 000 000 MHz Tune to each of the frequencies listed below Verify that the CW Generator remains phase locked at all frequencies and that the frequency counter agrees with the CW Generator frequency display 1 count 4 2 HP amp 671B Performance Tests PERFORMANCE TESTS FREQUENCY RANGE AND RESOLUTION cont d Procedure cont d Frequency Minimum Frequency MHz 2 000 000 2 000 001 2 001 112 2 002 223 2 003 334 2 004 445 2 005 556 2 006 667 2 007 778 2 008 889 2 009 999 1 999 999 2 000 000 2 001 111 2 002 222 2 003 333 2 004 444 2 005 555 2 006 666 2 007 777 2 008 888 2 009 998 Actual Frequency MHz MHz 2 000 001 2 000 002 2 001 113 2 002 224 2 003 335 2 004 446 2 005 557 2 006 668 2 007 779 2 008 890 2 010 000 Maximum Frequency 7 Set the CW Generator to 2 000 000 MHz 8 Tune the CW Generator to each of the fr
34. 20 0698 220 240V 220 240V OPERATION OPERATION PLUG BS 1363A CABLE HP 8120 1351 The number shown for the plug is the industry identifier for the plug only The number shown for the cable is an HP part number for a complete cable including the plug Figure 2 2 Power Cable and Mains Plug Part Numbers 2 2 HP 8671B Table 2 1 Allowable HP IB Address Codes Tak Listen Decimal Address Switches Octal Address Address Equiva Mee ne te Char Char lent 1 2 acter acter as l 0 E 7 17 0 0 1 E ee H 0 HiS 2 B T 0 3 3 S E TE E a E 0 5 L ee Aen 5 U T ee amp 6 0 7 GT ee TU H 8 1 1 o b 9 eel Seal eee dP 10 T 3 K 11 1 4 E A E eai pe A on M 13 1 6 N A E S a 0 5 7 0 P To 16 2 1 Q T 17 2 2 R T 2 Bo HP IB Address Selection coni d a Set the LINE switch to STANDBY Dis connect the line power cable b Remove the CW Generator s top cover by removing the two plastic standoffs from the rear of the top cover and loosening the screw at the middle of the rear edge of the top cover Then remove the A2 Assembly s protective cover Refer to the Disassembly Procedures in Section VIII Service Sheet A c Select the new address as shown in Table 2 1 The switches are shown in Figure 2 3 The HP IB ADDRESS SELECT switch settings fer S1 and 2 are in the octal code For example the factory selected add
35. 3 Load and run the following HP IB controller program As the program is execut ing adjust the trigger controls for a stable oscilloscope display 1 U LEAR 717 HT aana 3 0 GHz 3 dBm Ext ALC REL UUTDB UT 719 AOD GODZI 0 507 T 30 GOTO 26 4ih END 4 Press the pause key on the controller Load the following HP IB controller program l Controfler talk CW Generator listen L L SEND ZiMTA LISTEN 19 20 FOR Xet TO OG 0 dB range Ext ALC 30 OUTPUT 7 YK D ee cere ar oO TaN a 18 1579 PIF OO nie 40 WATT 03 peoe Ready for change to 110 dB Range S0 OUTPUT 7 K O amp O WALE 7 e E E 100 16h HP ASB L 20 UTPUT Fp annie Change to 110 dB Range ai WALT 05 r 5 for HP 85B 50 ms g0 NEXT X 100 END 4 21 Performance Tests HP 8671B PERFORMANCE TESTS OUTPUT LEVEL SWITCHING TIME TEST cont d Procedure NOTE contd Run this program only as long as necessary to make the level switch ing measurements This measurement cycles the attenuator which causes mechanical wear The program limits the number of cycles to 50 however if a digitizing oscilloscope is available only one cycle is needed 5 Run the program and measure the switching time by observing the signal on the oscilloscope display Refer to Figure 4 8 lt 20 ms Level Switching Time 2 01 ms division 200 mv division Figure 4 8 Output Level Switching Time Measurement Waveform 4 22 HD 8671B Performance Tests PERFORMANCE TESTS
36. 4 HP 8671B 2 15 Packaging Preparation for Packaging Remove handles and or rack mount flanges before packaging instrument for shipping Tagging for Service If the instrument is being returned to Hewlett Packard for service please complete one of the blue repair tags located at the back of this manual and attach it to the instrument Original Packaging Containers and materialis identical to those used in factory packaging are available through Hewlett Packard offices Mark the container FRAGILE to assure careful han dling In any correspondence refer to the instru ment by model number and full serial number Other Packaging The following general instruc tions should be used for re packaging with com mercially available materials a Wrap the instrument in heavy paper or plas tic If shipping to a Hewlett Packard office or ser vice center complete one of the blue tags men tioned above and attach it to the instrument b Use a strong shipping container A double wall carton made of 2 4 MPa 350 psi test material is adequate c Use enough shock absorbing material 75 to 100 mm layer 3 to 4 inches around all sides of the instrument to provide firm cushion and prevent movementin the container Protect the front panel with cardboard d Seal the shipping container securely e Mark the shipping container FRAGILE to assure careful handling HP 8671B Installation SIGNAL GROUND
37. 4 0L 6 UD9A0UI91 sem tamod OUT FI 813 8Y JJO AOJO J W09 UA 10 A SONY LS 0 POPPRMS SEM 11 910190 SE AO0onDai1 sures oY ye UO SUMI 10161990 MO IYL uopeanSyuog Uo uinL ASN 1049095 LOJ APOIA IQ PINOYS AOJDLIUIE MO IYI PUN S MUTU 19911 ulyum ffo UNI pynoys LOJDIIUNUUD ayy dn SuruapM saunbas LOJDLIUIL MO 24 FOYI aqvaIpul 0 Y8 pynoys AOJOIIUNUUD SNIVIS NAHAQ PYL ALON NO 9 YOUMS TNTT 04 408 Toued 10031 ay UO ajqeo amod ey ur Suja e T3 amS 998 p sn gJjoa sur y 107 et dordde st Sunes asni 0Y yeyy yooyD Z WOTIIOS IFEJJOA 1093309 301 YMS 3ezjoa BUI y YOoUD T yourd 1691 oy UO SUOTONASUI BS9Y MOTO ur peBsnqd zou st jqeo I mod y JJ NO 0 WOAS 7 NTT 943 Jos ut pessnyd Apeoaye st 107e 100901 MO II JI 0401063900001 Suryesedo ILIS V Fe OPeT IOSO HUAJA avi doan 01 poziS10ue ST UeAo UL UL Hand st aii 90 samod IYJ IIAIUIY M 01915 NO Ue pue 9181S AANV LS SBY 101819190 MO OU aanpedoig UO WUNL uQ UINL 6 LOdLOO AY aui 0 samod 299079 Aun 000 01 jou jnfaspa aq squouodwos 19949711 aaisuadxa fo 101091040 19910945 40f danamoH MI 04 dn suoynayddy amod 28J9094 JSUIDSD P9JIIJOLA 1 JAALNO AY SADLUI MD YT V JINSAL ADUL JUBWNAISU IYI OF AFDULDD 40 aoinos samod ayy fo 9FDIJON IY OF 195 IQ ISNUL 17 UO PAYIZUNS 81 JUIUNASU1 AY ALO fag pipzoy aif 40 YIOYS V asnDI pjnod Os Op OJ sdapjoyasn 1709410 14 05 dO S SN p smd d asn jou OG pa
38. 5 CABLE _ Figure 4 10 Non Harmeonically Related Spurious Signals Test Setup 2 Tune the CW Generator to 3 000 000 MHz and set the output level to 50 dBm 3 Set the spectrum analyzer controls to display the fundamental signal Set the resolution bandwidth to 1 kHz and the frequency span per division to 10 kHz 4 Set the spectrum analyzer controls so that the carrier signal is at the top graticule line 4 26 HD 8671B Performance Tests PERFORMANCE TESTS NON HARMONICALLY RELATED SPURIOUS SIGNALS TEST cont d Procedure cont d 5 6 7 Using the RANGE selector increase the CW Generator s output level to 0 dBm Do not adjust the spectrum analyzer amplitude calibration The top graticule line now represents 50 dBc Tune the spectrum analyzer to any desired frequency in search of non harmoni cally related spurious signals Verify that any signals found arenon harmonically related and are not generated by the spectrum analyzer Verify that the spurious signals are below the specified limits Record the results Spurious Signal Spurious Signal Carrier Frequency Frequency Level 3 000 MHz 3 000 MHz Repeat step 2 through 6 for any desired carrier frequency from 2 000 000 to 6 199 999 MHz Record the results Checking non harmonically related spurious signals from 2 0 to 6 2 GHz provides a high level of confidence that the instrument meets its published specifications from 2 to 18 GHz Spurious Signal
39. 5dBe 14 000 000 GHz 9 33 3333 GHz 2 3f 25 dB 16 000 000 GHz 5 333 333 GHz 1 3f te 2 BG 16 000 000 GHz 10 666 667 GHz 2 3f arla 25 dBe 18 000 000 GHz 6 000 000 GHz 1 3f La DE AEC 18 000 000 GHz 12 000 000 GHz 2 3f ite eee 4 25 Performance Tests HP 8671B PERFORMANCE TESTS 4 13 NON HARMONICALLY RELATED SPURIOUS SIGNALS TEST Electrical Characteristics Performance Limits SPECTRAL PURITY 2 0 to 6 2 GHz Spurious Non Harmonically 6 2 to 12 4 GHz 12 4 to 18 0 GHz Specification lt 70 dBe lt 64 dBc DU dBe Related Description This test checks for any spurious signals in the CW Generator s RF output signal The spectrum analyzer is calibrated for a reference level of 50 dBc and is tuned to any frequency from 2 0 to 6 2 GHz in search of spurious signals NOTE The non harmonicaily related spurious signals will always increase in amplitude above 6 2 GHz due to multiplication in the internal YIG tuned multiplier The increase is determined by a strict mathematical relationship Therefore satisfactory performance in the 2 to 6 2 GHz range will always ensure meeting the less stringent specification in the multiplied ranges that is from 6 2 to 18 0 GHz Equipment Spectrum Analyzer ccccee ees HP 8566B Procedure 1 Connect the CW Generator s RF OUTPUT to the input of the spectrum analyzer as shown in Figure 4 10 SPECTRUM ANALYZER 509 INPUT APC 3
40. 6 00 dBm 6 00 dBm 5 75 dBm 5 75 dBm 5 75 dBm 1 25 dBm 1 25 dBm 1 25 dBm 1 00 dBm 1 00 dBm 1 00 dBm 0 75 dBm 0 75 dBm 0 75 dBm LLL LLL L 1 75 dBm 1 75 dBm 1 75 dBm 2 00 dBm 2 00 dBm 2 00 dBm 2 25 dBm 2 25 dBm 2 25 dBm 6 75 dBm 6 75 dBm 6 75 dBm 7 00 dBm 7 00 dBm 7 00 dBm 7 25 dBm 7 25 dBm 7 25 dBm 11 75 dBm 11 75 dBm 11 75 dBm 12 00 dBm 12 00 dBm 9 75 dBm 9 75 dBm 9 75 dBm 10 00 dBm 10 00 dBm 10 00 dBm 10 25 dBm 10 25 dBm 10 25 dBm 4 75 dBm 4 75 dBm 4 75 dBm 5 00 dBm 5 00 dBm 5 00 dBm 5 25 dBm 5 25 dBm 5 25 dBm 1 75 dBm 1 75 dBm 1 75 dBm 2 00 dBm 2 00 dBm 2 00 dBm 2 25 dBm 2 25 dBm 2 25 dBm 3 25 dBm 3 25 dBm 3 25 dBm 3 00 dBm 3 00 dBm 3 00 dBm 2 75 dBm 2 75 dBm 2 75 dBm 8 25 dBm 8 25 dBm 8 25 dBm 8 00 dBm 8 00 dBm HD 8671B Performance Tests PERFORMANCE TESTS OUTPUT LEVEL HIGH LEVEL ACCURACY AND FLATNESS TEST cont d Table 4 1 Output Level High Level Accuracy and Flatness Test Record 2 of 2 High Level Accuracy cont d 10 dBm 0 dB range cont d 10 dBm 10 dB range 20 dBm 20 dB range 12 00 dBm 12 25 dBm 12 25 dBm 12 25 dBm 12 25 dBm 12 25 dBm 12 25 dBm 12 50 dBm 12 50 dBm 12 50 dBm 12 85 dBm 12 85 dBm 12 85 dBm 22 45 dBm 22 45 dBm 22 45 dBm 22 70 dBm
41. A3W3 to A3J9 Also used to connect an external frequency standard of 5 or 10 MHz at 0 dBm to the CW Generator 8 Line Power Module permits operation from 100 120 220 or 240 Vac The number visible in the window displays the nominal line Mains voltage for which the CW Generator is set see Figure 2 1 The protective grounding conductor connects to the CW Generator through this module The line power fuse A3F1 is inside this module and is the only part to be changed by the operator Figure 3 2 Rear Panel Features HP 8671B 3 11 SIMPLIFIED OPERATION 3 12 Frequency Frequency is set using the FREQUENCY RESO LUTION keys and the TUNING knob For exam ple to set the frequency to 15345 678 MHz Press PRESET 8 GHz This is not always neces sary but it will set the right hand six digits to 0 and may provide a convenient starting point Select the 100 MHz FREQUENCY RESOLUTION key and adjust the TUNING knob for a frequency of 15300 000 MHz Select the 1 MHz FREQUENCY RESOLUTION key and adjust the TUNING knob for a frequency of 15345 000 MHz Select the 10 kHz FREQUENCY RESOLUTION key and adjust the TU NING knob for a frequency of 15345 670 MHz Select the 1 kHz FREQUENCY RESOLUTION key and adjust the TUNING knob for a frequency of 153845 678 MHz Press HOLD to disable the TUNING knob 3 13 Output Level The output level is set with the OUTPUT LEVEL RANGE and VERNIER controls Operation First adjust RANG
42. Accessories Power Cord Operating and Service Manual and four extender boards HD 8671B General Information Table 1 2 Supplemental Characteristics Supplemental characteristics are intended to provide information useful in applying the instrument by giving typical but non warranted performance parameters FREQUENCY Internal Reference The internal reference oscillator accuracy is a function of time base calibration aging rate temperature effects and line voltage effects Typical temperature and line voltage effects are lt 1 x 1077 C and lt 5 x 10710 5 to 10 line voltage change Reference oscillator is kept at operat ing temperature in STANDBY mode with the instru ment connected to mains power The aging rate is lt 1 5 x 10 9 day after a 24 hour warmup External Reference input 5 or 10 MHz at a level of 0 1 to 1 Vrms into 500 Stability and spectral purity of the microwave output will be partially determined by characteristics of the external reference frequency Reference Gutputs 10 MHz at a level of 0 2 Vrms into 500 100 MHz at a level of 0 2 Vrms into 500 SPECTRAL PURITY Residual FM 80 Hz rms in a 50 Hz 15 kHz Post detection bandwidth from 2 6 2 GHz Residual FM doubles in the 6 2 12 4 GHz range and triples in the 12 4 18 0 GHz range RF OUTPUT For power settings gt 3 dBm changes in frequency from lt 10 GHz to gt 16 GHz may require a settling period for the power to stabilize
43. Bm 23 05 dBm 23 05 dBm 23 05 dBm Results Actual HP 8671B Max 2 00 dBm 2 00 dBm 2 25 dBm 2 25 dBm 2 25 dBm 3 25 dBm 3 25 dBm 3 25 dBm 3 00 dBm 3 00 dBm 3 00 dBm 2 75 dBm 2 75 dBm 2 75 dBm 8 25 dBm 8 25 dBm 8 25 dBm 8 00 dBm 8 00 dBm 8 00 dBm 7 75 dBm 7 75 dBm 7 75 dBm 7 75 dBm 7 75 dBm 7 75 dBm 7 50 dBm 7 50 dBm 7 50 dBm 7 15 dBm 7 15 dBm 7 15 dBm 17 55 dBm 17 55 dBm 17 55 dBm 17 30 dBm 17 30 dBm 17 30 dBm 16 95 dBm 16 95 dBm 16 95 dBm HD 8671B Performance Tests Table 4 4 Performance Test Record 4 of p Results Para Test No O Min Actual Max 4 10 LOW LEVEL ACCURACY i 2 0 GHz 30 dBm 32 65dBm l 27 35 dBm 40 dBm 42 95 dBm 1 37 05 dBm 50 dBm 53 25dBm n 46 75 dBm 60 dBm 63 55 dBm 56 45dBm 70 dBm 73 85 dBm 66 15 dBm 80 dBm 84 15 dBm 75 85 dBm 90 dBm 94 45dBm ss 85 55 dBm 100 dBm 104 75dBm 95 25 dBm 110 dBm 115 05 dBm mean inne 104 95 dBm 10 0 GHz 30 dBm 32 90dBm nn 27 10 dBm 40 dBm 43 20dBm 36 80 dBm 50 dBm 53 50 dBm L 46 50 dBm 60 dBm 63 80 dBm l 56 20 dBm 70 dBm 74 10dBm 65 90 dBm 80 dBm 84 40dBm a 75 60 dBm 90 dBm 94 70dBm __ 85 30 dBm 100 dBm 105 00dBm 1 n 95 00 dBm 110 dBm 105 30dBm
44. Checks Test Setup 6 Set the CW Generator as follows RF OUTPUT OFF PEAK NORM control NORM in detent OUTPUT LEVEL RANGE selector fully counter clockwise OUTPUT LEVEL VERNIER fully counter clockwise ALC selector INT ALC CAL control fully clockwise 7 Press the HOLD key Verify that the CW Generator s displays indicate the follow ing conditions RANGE dB display 110 dB Meter lt 10 dBm ALC annunciator INT and LVL UNCAL RF annunciator OFF FREQUENCY MHz display some frequency between 2 0 and 18 599997 GHz If the display is not stable press the PRESET 3 GHz key FREQUENCY RESOLUTION display Ali four segments extinguished STATUS annunciators OVEN may be on but should extinguish within 15 minutes after line cord is connected NOT PHASE LOCKED annunciator ON All other annunciators should be extinguished 3 23 Operation Procedure cont d 3 24 8 10 11 12 13 14 16 17 18 19 20 HP8671iB Baa Press the PRESET 3 GHz key and then the 100 MHz FREQUENCY RESO LUTION key Verify that the leftmost segment in the FREQUENCY RESOLU TION display lights and that the other segments are extinguished NOTE Do not tune above 6199 999 MHz in steps 9 through 17 Verify that the displayed frequency can be tuned in 100 MHz increments using the TUNING knob Press the 1 MHz FREQUENCY RESOLUTION key Verify that the two leftmost segments in the FREQ
45. E selector step the output level range from 110 to 10 dB Verify that the LVL UNCAL annunciator remains off Set OUTPUT LEVEL RANGE to 0 dBm and sweep the OUTPUT LEVEL VERNIER across its entire range Verify that the annunciator remains off at all VERNIER settings Select 100 MHz frequency tuning resolution and set the output level to 8 dBm Tune slowly from 2000 000 MHz to 18000 000 MHz Verify that the indicated power level on the CW Generator s meter remains constant and stable and that the LVL UNCAL annunciator remains off This ensures that the instrument can generate specified output power and remain leveled NOTE Momentary flashing of the LVL UNCAL when tuning is normal Make sure that it remains off after the meter has settled at each frequency 3 25 Operation HP 8671B OPERATOR S CHECKS 3 40 HP IB Checks DESCRIPTION These procedures check the CW Generator s ability to process or send the HP IB INITIAL SETUP EQUIPMENT messages described in Table 3 3 Only the CW Generator a controller and an HP IB controller interface for the HP 85B are needed to perform these checks These procedures do not check that all the CW Generator s program codes are being properly executed by the instrument However if the Basic Functional Checks and the HP IB Checks all pass then the instrument will probably execute all commands If the CW Generator fails any of these HP IB checks make sure the controller and i
46. E switch to STANDBY and then to ON With the Remote to Local transition the frequency will remain the same All other functions will return to the front panel settings Power may go up go down or stay the same 3 24 Addressing When the Remote Enable line REN and the Attention control line ATN are true and the Inter face Clear control line IFC is false the CW Generator interprets the byte on the eight HP IB data lines as an address or a command The CW Generator s Talk and Listen addresses can be set by switches located inside the instru ment The address selection procedure is described in Section I Refer to Table 2 1 for a comprehensive listing of all valid HP IB address codes 3 25 Data Messages The CW Generator communicates on the interface bus primarily with Data messages Data messages consist of one or more bytes sent over the bus data lines when the bus is in the data mode attention control line ATN false The CW Generator re ceives Data messages when addressed to listen and sends the Status Byte message when addressed to talk All instrument operations available in 3 17 Operation HP 8671B Table 3 3 Message Reference Table 1 of 2 Related HP IB Appli Commands Interface Message cable iaia and Functions Controls Data Yes Frequency Output level RANGE and VERNIER and ALC mode AHI can be programmed The CW Generator sends
47. E to step the output level up or down by increments of 10 dB The selected range is shown in the RANGE dB display Adjust VERNIER between 10 and 3 dBm as read on the meter for the desired output level The output level is determined by adding the RANGE dB display to the LEVEL dBm meter reading 3 14 ALC ALC automatic level control has three modes of operation They are INT Internal leveling XTAL External leveling using a crystal diode detector PWR MTR External leveling using a power meter Internal leveling is selected for most applications In this mode an internal detector senses the level at the input of the 10 dB step attenuator and the internal leveling circuitry keeps the output level constant Loss of leveling is indicated by the LVL UNCAL annunciator For external leveling a crystal diode detector or power meter can be used Operation is described further in the Detailed Operating Instructions 3 3 Operation HP 8671B Detailed Operating Instruction 3 15 ALC CONTROL Description The Synthesized CW Generator has three modes of Automatic Level Control ALC INT Internal leveling XTAL External leveling using a crystal diode detector PWR MTR External leveling using a power meter For most applications internal ALC INT will be used With internal ALC the output power remains flat over the entire 2 to 18 GHz frequency range External ALC is used when the power level at a remote point mus
48. EN RF OUTPUT OUTPUT MIXER x E IF INPUT Figure 4 12 Single Sideband Phase Noise Test Setup 3 Tune the CW Generator to 6 100 000 MHz and set the output level to 20 dBm 4 Set the local oscillator to 6 100 040 MHz at 8 dBm 4 32 HP 8671B Performance Tests PERFORMANCE TESTS SINGLE SIDEBAND PHASE NOISE TEST cont d Procedure 5 Setthe spectrum analyzer controls so that the peak of the 40 kHz signalis atthe top cont d graticule line 6 Observe the phase noise level 10 Hz from the carrier It should be greater than 56 7 dB below the carrier Record the measured level Measured mem Correction 1 30dB Actual level BM dBe 7 Tune the CW Generator and the local oscillator to 12 200 000 MHz and 12 200 040 MHz respectively 8 Observethe phase noise level 10 Hz from the carrier It should be greater than 50 07 dB below the carrier Record the measured level Measured mm Correction 1 30 dB Actual level lt 5 2 dBe 9 Tune the CW Generator and the local oscillator to 18 000 000 MHz and 18 000 039 MHz respectively 10 Observe the noise level 10 Hz from the carrier It should be greater than 46 7 dB below the carrier Record the measured level Measured Correction 1 30dB Actual level lt 48 dBe 11 Set the spectrum analyzer controls for a resolution bandwidth of 3 Hz and a frequency span per division of 20 Hz Using a 3 Hz bandwidth requires a 6 06 dB correction factor 12 Repeat
49. Generator becomes unaddressed and stops talking or listening HP 8671B Operation Table 3 4 Programming Quick Reference Guide PROGRAM STRING SYNTAX r Level p Modulation Controlier Talk Frequency Range Vernier AM FM ALC Synthesizer Listen CX XZK KX LX MO NG Ox Stands for Code Dummy Argument for Most Significant Frequency Execute Code Frequency Digits Frequency Digits WHERE C PROGRAM CODE X ARGUMENT OR FREQUENCY DIGIT ARGUMENTS PROGRAM CODES PROGRAM CODES ARGUMENTS 10 GHz or P 3 dBm 0 L GHz Aor 9 2 1 gt 100 MHz Bor R ae 1 2 10 MHz Cors Q 3 L 1 MHz Dor T 0 THROUGH 9 a a 4 amp 100 kHz E or U 2 5 ka 10 kHz F or V is 3 6 1 kHz G or W H 4 7 EXECUTE J or Z 5 8 S 6 9 0 dB S 9 OUTPUT LEVEL RANGE lt WMA HSQobwnNnr PROGRAM CODES INT NORMAL INT 10 RANGE XTAL NORMAL XTAL 10 RANGE MTR NORMAL MTR 10 RANGE STATUS BYTE Bit Number 8 7 6 Decimal Value 128 64 32 Function Sen PE OS COLD Frequency LOCKED Dum my codes for 8672A program compatibility 3 21 Operation HP 8671B OPERATOR S CHECKS a nm ert a 3 38 OPERATOR S CHECKS 3 39 Basic Functional Checks Description Equipment Procedure 3 22 The purpose of these checks is to give reasonable assurance that the instrument is operating properly Each check has b
50. HP 86718 OPERATING MANUAL HP 8671B SYNTHESIZED CW GENERATOR 2 0 18 0 GHz HEWLETT d PACKARD 841798 dH OPERATING MANUAL HP 8671B SYNTHESIZED CW GENERATOR 2 0 18 0 GHz DA anp Copyright HEWLETT PACKARD COMPANY 1985 1501 PAGE MILL ROAD PALO ALTO CALIFORNIA U S A OPERATING MANUAL PART NO 08671 90019 Operating and Service Manual Part No 08671 90017 Microfiche Part No 08671 96018 Printed December 1985 HP 8671B CONTENTS Page Section GENERAL INFORMATION Introduction xa S lt ekg SRTR R R NRT K TRAR A Rie nat 1 1 Spec Mn CHUONne uci R R ee R e RR RR RRR R KR eee 1 1 Safety Considerations 304 ce ea ae 1 1 Instruments Covered by This Manual 1 1 Manual Changes Supplement iat T 1 1 Description Sites aie 4 ee wae ade aes bead 1 2 OOS std aa gara aa A tee ack Ree eae 1 2 Mechanical Options STT 1 2 Accessories Supplied cece eee eees 1 2 Accessories Available ccc ccc cee reece 1 3 Electrical Equipment Available 1 3 Recommended Test Equipment 1 3 Section Il INSTALLATION Introduction 29 2525 05 crac Sethe va esos aw aes 2 1 Initial Inspection oom ye vee Se iaawedPa ee 2 1 Preparation For Use pie tere esas 2 1 Power Requirements eG haa sees ees 2 1 Line Voltage and Fuse Selection 2 1 Power Cables 3 02 erra cule oa ae eny eta eas 2 1 HP IB Address Sel
51. HP 86718 SYNTHESIZED CW GENERATOR OSCILLOSCOPE RF OUTPUT CHANNEL 1 CRYSTAL FE fey DETECTOR Figure 4 7 Quiput Level Switching Time Test Setup Equipment Oscilloscope e HD 1980B HP IB Controller 6034 62084 ceneGn ce oases HP 9836A or HP 85B 82903 Crystal Detector 26 ni oceceenkeeeacet tuae HP 8470B Opt 012 6000 Feedthru Termination HP 11095A Procedure 1 Set up the equipment as shown in Figure 4 7 The external trigger input of the oscilloscope should be connected to pin 6 of the HP IB cable or A2A9U14 pin 15 An HP IB adapter HP 10834A can be used to make a permanent trigger adap ter for this test WARNING To access A2A9U14 the instrument s protective cover must be re moved This should be performed only by service trained personnel who are aware of the hazards involved for example fire and electri cal shock 4 20 HP 8671B Performance Tests PERFORMANCE TESTS OUTPUT LEVEL SWITCHING TIME TEST cont d Procedure 2 Set the oscilloscope for external triggering positive trigger slope triggered contd sweep mode or NORM and 2 ms per division sweep time NOTE The following programs are for the HP 9826 or HP 9836 controller For use with the HP 85B controller increase the wait statements by a factor of 1000 This is necessary because the HP 9826 and HP 9836 execute wait commands in seconds while the HP 85B executes wait commands in milliseconds
52. HP 9836A BASIC Send the Remote message by setting REMOTE 719 REMOTE 719 the Remote Enable bus control line REN true and addressing the CW Generator to listen Description HP 858 BASIC OPERATOR S Check that the CW Generator s REMOTE annunciator is on and the OUTPUT RESPONSE LEVEL meter reads 10 dBm OPERATOR S Check that the CW Generator s REMOTE annunciator is off and the OUTPUT RESPONSE LEVEL meter reads 3 dBm Send the Local message to the CW Generator Receiving the Data Message NOTE This check determines whether the CW Generator properly receives Data messages HP 9826A BASIC Description HP 85B BASIC HP 9836A BASIC Send the first part of the Remote i message enabling the CW Generator to remote REMOTE7 REMOTE 7 t i l Address the CW Generator to listen OUTPUT 719 OUTPUT 719 completing the Remote message then P18W0Z173075 P18W0Z173075 send a Data message OPERATOR S Check that the CW Generators REMOTE annunciator is on RANGE dB indicates RESPONSE 70 dB ALC annunciators show XTAL mode and LVL UNCAL and the FRE QUENCY MHz display shows 18000 MHz Sending the Data Message NOTE This check determines whether the CW Generator properly issues a Data message when addressed to talk Before beginning this test set the LINE switch to OFF then to ON If an HP 9826A or 9836A controller is used a short program is required to perform this check
53. IER m Argument for RANGE 0 dB Code for RANGE Program HP IB Lh cs et CG d MAL K MMA l H p T D p peri pees Codes Arguments 3 dB 2 dl 0 A bet 2 4 D 0 i 8 g 10 OUTPUT LEVEL VERNIER Comments Output level flatness is dependent on the ALC circuitry and the maximum available power In order to have a leveled output it is necessary for the ALC circuitry to contin uously control the output level This can only occur if the selected output power is below the maximum power level available at each frequency For leveled output power in the 10 dB range itis necessary that the LVL UNCAL annunciator remain off Ifit lights adjust the PEAK NORM control or reduce the VERNIER setting For output level settings above 8 dBm spurious oscillations can occur resulting in sidebands on the carrier at a level of 30 to 50 dBc These oscillations occur only over small portions of the frequency range 3 13 Operation HP 8671B Detailed Operating Instructions LEVEL CONTROL cont d Comments contd Related Sections 3 14 They can usually be eliminated by performing a PEAK NORM adjustment or by reduc ing the OUTPUT LEVEL VERNIER setting 1 or 2 dB External ALC leveling also requires that the CW Generator can produce enough power to overcome losses in the intervening circuitry The LVL UNCAL annunciator must remain off to achieve leveling If it lights adjus
54. M Resolution 100 Y oni 1V de range or HP 3455A dai H errr Foam Pads 43 X 58 em 17 X 23 in 5 em 2 in thick 2 required Frequency Counter Range 2 to 18 GHz HP 5343A Resolution L kHz 10 MHz Frequency Standard Output 0 1 Vrms Frequency Standard Long Term Stability Better than 160 297 day HP 50654A High Impedance Probe Frequency 400 MHz Output Impedance 50 0 compatible with HP 1121A Spectrum Analyzer Range 2 to 18 GHz HP 8340A Level 7 dBm Single Sideband Phase Noise and Local Oscillator Logic State Analyzer 8 Bit Display Triggerable HP 1630A 1 8 T HP 8671B General Information Table 1 3 Recommended Test Equipment 2 of 3 ie ae Recommended n Critical Specificatians Model Mixer Response 2 to 18 GHz VSWR LO 2 5 1 VSWR RF lt 4 0 1 Power Sensor RHG DMS1 18 Bandwidth 50 MHz Vertical Sensitivity 50 mV div Vertical Input 500 ac or de coupled External Trigger Capability HP 1980B Frequency 2 to 18 GHz Range 17 te 25 dBm HP 436A P A T Frequency 2 to 18 GHz HP 8481A Input Impedance 500 SWR lt 1 28 Range 17 to 25 dBm Must be compatible with power meter Power Source Range 110 to 120 Vac California Instruments Variable Frequency 52 to 58 Hz 501TC 800T Frequency AC Accuracy 2 Hz Amplifier 20 dB Frequency 100 kHz Gain 20 5 dB Output Power gt
55. N 1 1 INTRODUCTION This manual contains information required to install operate test adjust and service the Hewlett Packard 8671B Synthesized CW Gener ator Figure 1 1 shows the CW Generator with all of its externally supplied accessories The 8671B Operating and Service manual has eight sections The subjects addressed are Section I General Information Section II Installation Section IHI Operation Section IV Performance Tests Section V Adjustments Section VI Replaceable Parts Section VII Manual Changes Section VIII Service Two copies of the operating information are sup plied with the CW Generator One copy is in the form of an Operating Manual The Operating Manual is a copy of the first four sections of the Operating and Service Manual The Operating Manual should stay with the instrument for use by the operator Additional copies of the Operating Manual can be ordered separately through your nearest Hewlett Packard office The part number is listed on the title page of this manual Also listed on the title page of this manual below the manual part number is a microfiche part number This number may be used to order 100 x 150 millimetre 4 x 6 inch microfilm transparen cies of this manual Each microfiche contains up to 96 photo duplicates of the manual pages The microfiche package also includes the latest Man ual Changes supplement as well as all pertinent Service Notes 1 2 SPECIFICATIONS Instru
56. NO AH UauA UO PSUIN sue sLopeunuue TYONN 7347 pue q Yy201 SSVHd LON au L uoisod 440 3U UL USYM ndino JH Ou HO suin YOUMS JAO NO LAdLNO dH GP OLL 0 0L eHues payoojes sejeolpul Aejdsip gp SONVH sBulpeas wgp sejow pue GP AONVY BY jo wns y SI jaaaj INdINO penjor oyy wgp 0 OL eBues gp cL 2 1840 J A9 INA NO spes JoowW AAA Get saunlvasd TANVd LNOUWS uopedo k Lp P PEPES Foo Rn Oo Fn Fn Oana he On Fe Cae 1O 4 add a e e a Laad at ad eka a S HP IB CONNECTOR connects the CW Generator to the Hewlett Packard Interface Bus for remote operation When in remote operation the REMOTE annunciator illuminates 2 100 MHz OUT A3J7 0 dBm nominal into 50 ohms can be used as an external timebase and for troubleshooting E 10 MHz QUT A3U8 0 dBm nominal into 50 ohms can be used as an external timebase and for troubleshooting O FREQ STANDARD Output 153 91 10 000 MHz into 50 ohms at 7 dBm nominal from the inter nal reference oscillator except when INT EXT switch is in the EXT position G FREQ STANDARD INT EXT switch normally set to the INT position Removes power from inter nal reference oscillator when in the EXT position HP 8671B PT E Raa aaae Eeee 0 0 GO Be AR QO Jumper A3W3 normally connects the Internal Frequency Standard Output A3J9 to the External Frequency Standard Input A3J10 7 FREQ STANDARD fnpul A3J10 normally con nected by
57. NS Figure Page Figure Page 1 1 HP Model 8671B Accessories Supplied and 4 1 Frequency Range and Resolution Options 907 908 and 909 1 0 Fest SOLU riberas e carines i oan eee 4 2 4 2 Frequency Switching Time Test Setup 4 6 4 3 Frequency Switching Time Measurement 2 1 Line Voltage and Fuse Selection 2 2 Waveform lt e 4 8 2 2 Power Cable and Mains Plug Part 4 4 Amplitude Recover Measurement Numbers TTT 2 2 Waveform TTT 4 10 2 3 HP IB Address Switches Shown as Set by 4 5 Output Level High Level Accuracy the Factory c fo bat ioe sex sake ew ates 2 3 and Flatness Test Setup 0 4 12 2 4 Hewlett Packard Interface Bus 4 6 Low Level Accuracy Test Setup 4 17 CONMECHON cans che cid teanta H R KLER 2 5 4 7 Output Level Switching Time Test Setup 4 20 4 8 Output Level Switching Time Measurement Waveform 4 22 A 34 Front Panel Features 0 cee eceee 3 2 4 9 Harmonics Subharmonics and Multiples 3 2 Rear Panel Features 000 0 eevee 3 2 Test Setup s025 05564 erreia ie ds 4 23 3 3 External Leveling with a Crystal Detector 3 4 4 10 Non Harmonically Related Spurious 3 4 External Leveling with a Power Meter 3 5 Test Setup 6ci 345hsac des dea eaeiote Nena 4 26 3 5 Frequency Programming Codes and 4 11 Power Line Related Spurious Signals YgUMEN S lt c e e eK 3 10 Fest SetuP TTT 4 29 3 6 Frequency Switching Time Showing 4 12 Si
58. P 858 BASIS HP 9826A BASIC aeeoea nn i e r Sa Send the Clear message CLEAR 719 CLEAR 719 Send a Data message containing an OUTPUT 719 OUTPUT 719 out of range frequency This causes the P3521 P3521 Require Service message to be sent 3 29 Operation HP amp 671B OPERATOR S CHECKS HP IB Checks contd NOTE If an HP 9826A or 9836A controller is being used a short program is required for the next part of this check HP 9826A BASIC HP 9836A BASIE Description HP 85B BASIC Read the binary status of the con troller s HP IB interface and store the data in variable V In this step 7 is the interface s select code and 2 HP 85B and 7 HP 9826A are status registers for bus control lines Display the value of the SRQ bit In DISP SRQ 30 DISP SRQ this step 5 ETP 85B and 10 HP 9826A BIT V 5 BIT V 10 or HP 9836A are the SRQ bits for the controller numbered from 0 40 END 20 STATUS 7 7 V OPERATOR S Check that the SRQ value is 1 Raatan that the CW Generator issued the Require RESPONSE Service message Status Bit Message NOTE This check determines whether the CW Generator sends the Status Bit message This check can be performed in either local or remote mode This check assumes that the Clear message has been sent HP 8826A BASIC Description HP 858 BASIC HP 9836A BASIC Set up a Service Request condition by OUTPUT 719 OUTPUT 719 p
59. P O TWISTED PAIR WITH 11 P O TWISTED PAIR WITH 10 SHIELD CONNECT TO EARTH ATN GROUND SRQ SHOULD BE GROUNDED P O TWISTED PAIR WITH 9 IFC AE OTE Wine om P O TWISTED PAIR WITH 8 NDAC TWISTED PAIR P O TWISTED PAIR WITH 7 NRFD P O TWISTED PAIR WITH 6 DAV REN EO DIO8 DIO4 DIO DIO 3 D106 DIO 2 DIOS DIO SO METRIC THREAD M3 5 x 0 6 24 PiN MICRO R BBON SERIES 57 CONNECTOR Logic Levels i The Hewlett Packard Interface Bus Logic Levels are TTL compati ble i e the true 1 state is 0 0 Vde to 0 4 Vde and the false 0 state is 2 5 Vde to 5 0 Vde Programming and Output Data Format Refer to Section III Operation 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 metres 1 6 ft Cabling Restrictions 1 A Hewlett Packard Interface Bus system may contain no more than 2 metres 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 5 2 6 HD 8671B Operation SECTION IH OPERATION 3 1 INTRODUCTION This section provides complete operating infor mation for the CW Generator Included are both simplified and detailed operating instructions detailed descriptions of the front and rear panel lo
60. Pressthe1kHz rightmost FREQUENCY RESOLUTION key Adjust TUNING for a frequency of 3450 001 MHz Q 3450001 Z 1 L Dummy Argument for Frequency Execute Code for Frequency Execute Command Argument for 1 GHz Frequency Resolution Code for 1 GHz Frequency Resolution or R 450001 Z 1 Dummy Argument for Frequency Execute Code for Frequency Execute Command m Argument for 100 MHz Frequency Resolution Code for 100 MHz Frequency Resolution or R45 W121 Dummy Argument for Frequency Execute Code for Frequency Execute Command Argument for 1 kHz Frequency Resolution TF Code for 1 kHz Frequency Resolution Argument for 100 MHz Frequency Resolution Code for 100 MHz Frequency Resolution Program Codes PROGRAM CODES ARGUMENTS C HP IB 4 10 GHz or P 1 GHz A or U 100 MHz DB or R 10 MHz C or M 1 MHz Dor T 0 THROUGH 9 i 100 kHz E or U 10 kHz F or V 1 kHz G or W EXECUTE J or Z gt Cut am Lid G LL EG L 3 9 Operation HP 8671B Detailed Operating Instructions FREQUENCY CONTROL cont d FREQUENCY ARGUMENTS FREQUENCY p EXECUTE PROGRAM CODE a DUMMY ARGUMENT FREQUENCY PROGRAM i E a v 0 6 w 0 0 0 X sorso 1 fifro 4 frof vo A P GHz MHz kHz SQ means that for a given program code this digit wil change to zero if not programmed _ means that the digit will change only if programmed means that above 6 2 GHz this digit may change due to random rounding how
61. Spurious Signal Carrier Frequency Frequency Level 4 27 Performance Tests HP 8671B PERFORMANCE TESTS 4 14 POWER LINE RELATED SPURIOUS SIGNALS TEST Specification Electrical Characteristics Performance Limits Conditions SPECTRAL PURITY Power line related and 2 0 6 2 GHz fan rotation related lt 300 Hz offset from carrier within 5 Hz below line 300 Hz to 1 kHz offset from frequencies and carrier multiples therof gt 1 kHz offset from carrier 6 2 12 4 GHz lt 300 Hz offset from carrier 300 Hz to 1 kHz offset from carrier gt 1 kHz offset from carrier 12 4 18 0 GHz lt 300 Hz offset from carrier 300 Hz to 1 kHz offset from carrier gt 1 kHz offset from carrier Description The Unit Under Test and local oscillator are isolated from vibration by placing the instruments on two inch thick foam pads This eliminates the effects of microphonic spurious signals due to vibrations The primary power source is isolated from the power source used for the spectrum analyzer and the local oscillator to differentiate the power line related spurious signals from other power line related spurious signals NOTE The Unit Under Test must be operated at a power line frequency differ ent than that of the local oscillator and spectrum analyzer This avoids the summing of the power line spurious signals Equipment Local Oscillators ocs tee sas igandad ass 555 HP 8340A Spectrum Analyzer ccc cc eee e eee eee HP 3580A Mixer chs ces dh
62. TS 4 9 OUTPUT LEVEL HIGH LEVEL ACCURACY AND FLATNESS TEST Specification Description Equipment Procedure Electrical Characteristics Performance Limits 15 to 35 C 2 0 6 2 GHz RF OUTPUT Output Level Leveled Output 8 dBm to 120 dBm Remote Programming Absolute Level 1 00 dB 10 dB output level range Accuracy 15 C to 1 00 dB 0 dB output level range 35 C 1 50 dB 10 dB output level range 1 70 dB 20 dB output level range 6 2 12 4 GHz 1 25 dB 10 dB output level range 1 25 dB 0 dB output level range 1 75 dB 10 dB output level range 1 95 dB 20 dB output level range 12 4 18 0 GHz 1 50 dB 10 dB output level range 1 50 dB 0 dB output level range 2 10 dB 10 dB output level range 2 80 dB Add 0 75 dB to remote programming absolute level accuracy 20 dB output level range Manual Absolute Level Accuracy Absolute level accuracy specifications include allowances for detector linearity temperature flatness attenuator accu racy and measurement uncertainty 2 0 to 6 2 GHz 2 0 to 12 4 GHz 2 0 to 18 0 GHz Flatness 0 dBm range 15 to 35 C This test checks output level maximum leveled power absolute level accuracy between 8 dBm and 20 dBm and output level flatness The output level test uses a power meter to verify th
63. UENCY RESOLUTION display are lighted and that the other segments are extinguished Verify that the displayed frequency can be tuned in 1 MHz increments using the TUNING knob Press the 10 kHz FREQUENCY RESOLUTION key Verify that the three left most segments in the FREQUENCY RESOLUTION display are lighted and that the other segment is extinguished Verify that the displayed frequency can be tuned in 10 kHz increments using the TUNING knob Press the 1 kHz FREQUENCY RESOLUTION key Verify that all segments in the FREQUENCY RESOLUTION display are lighted Verify that the displayed frequency can be tuned in 1 kHz increments using the TUNING knob Tune the frequency to 4 GHz and press the HOLD key Verify that the four segments of the FREQUENCY RESOLUTION display are extinguished Press the PRESET 3 GHz key and verify that the FREQUENCY RESOLUTION display indicates 3000 000 MHz Set the CW Generator as follows RF OUTPUT ON PEAK NORM control NORM in detent OUTPUT LEVEL RANGE selector 0 dB range OUTPUT LEVEL VERNIER for 0 dBm reading on meter ALC selector INT ALC CAL control fully clockwise Tune the CW Generator frequency to 2 GHz and select 1 kHz FREQUENCY RESOLUTION Slowly tune from 2000 000 MHz to 2000 010 MHz Verify that the NOT PHASE LOCKED annunciator remains off at each step Set the frequency tuning resolution to the values shown in the following table For each tuning resolution slowly tune from the corresp
64. __ 55 dBe HD 8671B Performance Tests PERFORMANCE TESTS 4 15 SINGLE SIDEBAND PHASE NOISE TEST Specification Electrical Characteristics Performance Limits Conditions 2 0 6 2 GHz 10 Hz offset from carrier 100 Hz offset from carrier 1 kHz offset from carrier 10 kHz offset from carrier 100 kHz offset from carrier Single sideband Phase Noise 58 dBe 1 Hz bandwidth 70 dBe 78 dBe 86 dBe 110 dBe 10 Hz offset from carrier 100 Hz offset from carrier 1 kHz offset from carrier 10 kHz offset from carrier 100 kHz offset from carrier 52 dBe 64 dBe 72 dBe 80 dBe 104 dBc 12 4 18 0 GHz 10 Hz offset from carrier 100 Hz offset from carrier 68 dBe 1 kHz offset from carrier 76 dBe 10 kHz offset from carrier 100 dBe 100 kHz offset from carrier 48 dBe 60 dBc i 6 2 12 4 GHz i Description The RF output of the CW Generator is mixed with a local oscillator to obtain a 40 kHz or 200 kHz IF signal The phase noise sidebands are observed on a spectrum analyzer Correction factors are applied to compensate for using the spectrum analyzer in the log mode for local oscillator noise contributions and for using bandwidths wider than 1 Hz NOTE Normally phase quadrature needs to be maintained between the CW Generator and the local oscillator for true phase noise measurement However the additional amplitude noise components are so small that they are not significant i
65. a HP IB The frequency can be tuned with one of four fre quency resolutions Tuning resolutions of 100 MHz 1 MHz 10 kHz or 1 kHz are selected by front panel pushbuttons The 1 kHz tuning resolution will give tuning resolutions of 1 kHz for frequencies from 2 0 to 6 2 GHz 2 kHz for frequencies from 6 2 to 12 4 GHz and 3 kHz for frequencies from 12 4 to 18 599997 GHz Long term frequency stability is dependent on the time base either an internal or external reference oscillator The internal crystal reference oscillator operates at 10 MHz while an external oscillator may operate at 5 or 10 MHz The output of the CW Generator is exceptionally flat due to the action of the internal automatic level ing control ALC loop External leveling control using a diode detector or a power meter to sense output power can be used to level the output at a remote load The output level is set using the OUTPUT LEVEL RANGE switch and the OUTPUT LEVEL VERN IER The OUTPUT LEVEL RANGE switch changes the output level in 10 dB increments 10 to 110 dB The OUTPUT LEVEL VERNIER is then used to adjust the output level over a continu ous 13 dB range 10 to 3 dBm The output levelis read by adding the vernier setting to the range setting The CW Generator is compatible with HP IB to the extent indicated by the following codes SH1 AH1 T6 TEO L4 LEO SR1 RL2 PP2 DC1 DTO and CO An explanation of the compatibility code can be found i
66. a microwave counter and a power meter can be used This procedure assures that most front panel controlled functions are being properly executed by the CW Generator HP IB Checks This procedure assumes that front panel operation has been verified with the Basic Functional Checks The procedure checks all of the applicable bus messages summarized in Table 3 3 3 1 Table 3 1 Operating Characteristics Frequency Range 2 0 to 18 0 GHz Overrange to 18 599997 GHz Resolution 1 kHz 2 0 to 6 2 GHz 2 kHz 6 2 to 12 4 GHz 8kHz 12 4 to 18 0 GHz Output Level Range 120 to 8 dB in 10 dB steps Vernier 10 to 3 dBm continuously variable Internal external crystal detector or external power meter leveling Table 3 2 Index of Detailed Operating Instructions ALC CONTROL Local Procedure Internal Leveling External Crystal Detector Leveling External Power Meter Leveling Remote Procedure Comments FREQUENCY CONTROL Local Procedure Remote Procedure Comments LEVEL CONTROL Local Procedure Remote Procedure Comments PEAK NORM ADJUSTMENT Local Procedure Comments RF ON OFF SWITCH Local Procedure Remote Procedure Comments 3 7 Operator s Maintenance 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 primary fuses This fuse is loc
67. ace Bus HP IB HP IB compatibility programming and data formats are described in the following paragraphs All front panel functions except that of the ALC CAL control PEAK NORM control and LINE switch are programmable via HP IB A quick test of the CW Generator s HP IB interface is described in this section under HP IB Checks These checks verify that the CW Generator can respond to or send each of the applicable bus messages described in Table 3 3 3 21 HP IB Compatibility The CW Generator s programming capability is described by the twelve HP IB messages listed in Table 3 3 The CW Generator s compatibility with HP IB is further defined by the following list of interface functions SH1 AH1 T6 TEO L4 LEO SR1 RL2 PP2 DC1 DTO and CO Amore detailed explanation of these compatibility codes can be found in IEEE Standard 488 1978 and the identical ANSI Standard MC1 1 3 22 Remote Mode Remote Capability The CW Generator communi cates on the bus in both remote and local modes In remote the CW Generator s front panel controls are disabled except for the LINE switch However front panel displays remain active and valid In remote the CW Generator can be addressed to talk or listen When addressed to listen the CW Gener ator automatically stops talking and responds to the following messages Data Clear SDC Remote Local and Abort When addressed to talk the CW Generator automatically stops listening
68. and sends one of the following messages Data Require Service or Status Byte Whether addressed or not the CW Generator responds to the Clear DCL Clear Lockout Set Local and Abort mes sages In addition the CW Generator can issue the Require Service message and the Status Bit message Local io Remote Mode Changes The CW Gener ator switches to remote operation upon receipt of the Remote message The Remote message has two parts They are a Remote enable bus control line REN set true Operation b Device listen address received once while REN is true When the CW Generator switches to remote the REMOTE annunciator on the front panel turns on With the exception of VERNIER which will reset to 10 dBm the CW Generator s control settings remain unchanged with the Local to Remote transition 3 23 Local Mode Local Capability In local the CW Generator s front panel controls are fully operational and the instrument will respond to a Remote message The CW Generator can send a Require Service message a Status Byte message and a Status Bit message while in the Local mode Remote to Local Mode Changes The CW Gener ator switches to local from remote whenever it receives a Local GTL Universal Unlisten ad dress Abort or Clear Lockout Set Local message The Clear Lockout Set Local message sets the Remote Enable control line REN false The CW Generator can also be switched to local by turning the LIN
69. at 8 dBm can be generated over the full 2 to 18 GHz frequency range Level flatness measures the variation in level over the various specified ranges The high level accuracy test verifies that power levels between 8 dBm and 20 dBm are within the manual absolute level accuracy specification Power Meter si S 5 SR arr 0 4 Re aaa TR Ta dns HP 436A Power Sonson 35 4 0 9 SE T ohio 4 4 in sae sees HP 8481A Output Level Test 1 Connect the power sensor to the power meter Calibrate and zero the power meter 2 Connect the power sensor to the RF OUTPUT connector of the CW Generator as shown in Figure 4 5 4 1 Performance Tests HP 8671B PERFORMANCE TESTS OUTPUT LEVEL HIGH LEVEL ACCURACY AND FLATNESS TEST cont d Procedure cont d HP 8 CW G POWER SENSOR SENSOR Figure 4 5 Output Level High Level Accuracy and Flatness Test Setup 3 Set the CW Generator frequency to 2 0 GHz and the output level range to 10 dB 4 Adjust the VERNIER control to give a power meter reading of 8 dBm 5 Tune the CW Generator in 100 MHz steps from 2 to 18 GHz adjusting the power meter s calibration factor and recording the frequency at which minimum power occurs Reset VERNIER to read 8 dBm on the power meter at the recorded frequency to ensure that the 8 dBm power level can be met Frequency Minimum Power gt 8 dBm Level Flatness 6 Set the CW Generator frequency to 2 GHz output level to 5 dBm and power
70. at the set level Spur ious output oscillations may occur for settings above 8 dBm External leveling device characteristics will deter mine output flatness absolute level accuracy and switching time in external leveling modes Maximum Reverse Power 1W RF input 1 MHz 20 GHz 0 Vdc Impedance 5020 Source SWR lt 2 0 1 1 7 General Information Table 1 3 Recommended Test Equipment 1 of 3 Recommended Instrument Critical Specifications Model AC Voltmeter Range 1 mV to 10V HP 400E Accuracy 1 5 of full scale 1 5 of reading Frequency Response 3 kHz te 3 MHz Attenuator Range de to 1 GHz HP 8491A Fixed 3 dB Accuracy 0 5 dB Option 003 SWR lt 1 3 Attenuator Range de to 18 GHz HP 8491B Fixed 20 dB Accuracy 1 0 dB Option 020 SWR lt 1 6 Cable Special See YTO Loop Phase Detector Adjustments in Localiy Fabricated Interconnect Section V Yontroller HP IB HP IB compatibility as defined by IEEE HP 85B 82987A Standard 488 1978 and the identical ANSI or 9826A Option 011 HP 8671B Use A C P C T P gt Standard MC1 1 SH1 AH1 T2 TEO L2 LEO or 9836A with BASIC 2 0 SRO RLO PPO DCO DTO and C1 2 3 4 5 Operating System Frequency Range 2 to 18 GHz HP 8470B Frequency Response 1 5 dB Option 012 Crystal Detector i P A Current Probe Frequency Range 2 to 35 MHz HP 1110B A Digital Voltmeter Range 60V to 40V de HP 3456A DV
71. ated in the line module assembly Refer to Figure 2 1 for instruc tions on changing the fuse pappisap aq Apu 010491901 MO 911 JO asiou aspyd ay LaQANOL LOPDIIUNUUD 8NIDIS TFYOO T ASVHA LON 2yiffo Uan 0 2Uua191f NS aq ADU 1343 SP1 SUYO OE OJU SULLA T 01 Q srun paifisads IYI TUH JOU 81 Jana aduadafas JOULAIXA IYI JI NIJO 0 U14930 91901734 40f ZW JO ZH 00T 40 ZHW OT 70 ZH 0087F UIYPMN IQ ISNU 370942129 JDULAIXA IYJ Janay 4amod quaj jnsu UD spy 40 Aouanbas UI KIDANII quaroi ns JO JOU 1 aouasafas 704913 IYI D 1051 ADU LOZDIIUNUUD SNID18 TAMOOT ASVHd LON 244 0STY pasn Bulag 1 aauasafad JoULaIXA UD UaYM URT n 19100 100447 IYI UO LOJDIDUNUUD 8NIDIS TAO TAY TY NAL NT UYL ALON 09109002 oq Wed YTO wgp 0 19 ZHI 01 10 9 Jo prepurys Aouanbay 8 10100uuo0 LXA CUVANVAS GAYA 044 Woy poyoouuoostp st 16d nt y pue uonisod XG 9Y Ul St UOTLAS LXA LNI GUVANVLS GAUA 94 ouA pal qeue sr 107e IOso 9709491091 BULE UL IY OLFEY PUB GPEY UseMjoq popouuoo st radumi y pue uoryisod LNI 9Y Ur St YOuULMS TXG LNI CUVANV LS GAUA OU WYM LOPB IOSO 970910191 EUIVIUL S AOYBAIUSL MO VY JO pvaqsut pesn aq 0 EUJS 9709010191 V 1090096 UVI 30109009 LXA CUVANVLS OWA p Uu0d uogoajas Puepuels Aouenbai4 SUL COLPEV 401000000 LXA CUVANV LS OA 047 0 ELEY 10109000 LNI AGUVANVILS OF 943 speuu0s Ajewaou Jeduin y oued reer y UO poyBoO ITE S10JOVUTOD 044 PUB OLAR LXA LNI GUVANV LS Td Y uolas piepuers ADUENbal
72. cal and remote operator s checks and operator s maintenance l 3 2 Panel Features Front and rear panel features are described in detail in Figures 3 1 and 3 2 3 3 Operating Characteristics Table 3 1 briefly summarizes the major operating characteristics of the CW Generator This table is not intended to be a complete listing of all opera tions and ranges but gives a general idea of the instrument s capabilities For more information on the CW Generator s capabilities refer to Table 1 1 Specifications and Table 1 2 Supplemental Characteristics For information on HP IB capa bilities refer to Table 3 3 Message Reference Table 3 4 Local Operation Information covering front panel operation of the CW Generator is given in the sections described below To quickly learn the operation of the instru ment begin with Operating Characteristics and Simplified Operation Operator s Checks can also be used to gain familiarity with the instrument Once familiar with the general operation of the instrument use the Detailed Operating Instructions as a reference for more complete operating infor mation Turn On Information Instructions relating to the CW Generator turn on procedure and frequency standard selection are presented to acquaint the user with the general operation of the instrument Simplified Operation The instructions located on the inside of the fold provide a quick introduction to the operation of t
73. eady for change to 2 1 GHz Hd GUTRPUT 7 Yez 1000U U Z bU WAIT 7 L 700 for HP 858 700 ms 70 OUTPUT 71 1 L Change frequency HU WATT J5 Tn BU for HP 85B 50 ms 9g GOTO ay 100 END 4 7 Performance Tests HP 8671B PERFORMANCE TESTS FREQUENCY SWITCHING TIME TEST cont d Procedure cont d 1 5 ms division 50 mv division Figure 4 3 Frequency Switching Time Measurement Waveform 6 Measure the switching time by observing the signal on the oscilloscope display The external trigger is the reference for determining switching speed The switching time is measured from the display s left graticule to the last phase reversal as the CW Generator passes the local oscillator frequency before the IF signal settles into a steady frequency Refer to Figure 4 3 Record the frequency switching time lt 15 ms 7 Modify lines 30 and 50 to read as follows Frequency 2 1 GHz 40 GUTPUT 73 ALLOOO COZ a0 QUTPUT Ps TYPI DU 000 Z Frequency 18 GHz 8 Set the local oscillator frequency to 17 999 997 MHz 9 Run the modified program and measure the switching time to the last phase reversal lt 15 ms Amplitude Recovery Time 10 Set the local oscillator to 6 100 001 MHz 11 Load and run the following program Adjust the vertical sensitivity and position of the display until the displayed signal indicates a peak to peak change of exactly 2 divisions in amplitude This calibrates the oscilloscope to 3 dB about
74. ection 0 0 0 ccc cee ees 2 2 Interconnections cccceeneecceles dv bron sews 2 3 Mating Connectors 2 3 Operating Environment 23 send ees 2 3 Bench Operation 446 044 eels de as Sur RE ae RS 2 4 Rack Mounting vs ects SEN is ha ae iisen 2 4 Storage and Shipment cided sas eau eae vas 2 4 Envronmeht rises E te Noes ia ee eres 2 4 PUCKAGIN ES ayia erates E Want Smee ate 2 4 Section HI OPERATION F Se L eer aici 2 Uris ure caries ean scarey aie Se 3 1 Panel Features 12355253 cog2 oe 52 ee Sal ete Sees 3 1 Operating Characteristics 3 1 Local Operation 3 1 Remote HP IB Operation 00 cee 3 1 Operators Cheeks insane eile 42 oe ada see 3 1 Operator s Maintenance 00ce S Turn On Instructions ci a Lie eks 3 1 Trn On aand eS T L a eee ee E 3 1 Frequency Standard Selection 3 1 Simplified Operation lt occu Ge as Peewee dows 3 3 Frequency ereer nododd tsai a bes a N K bade whe 3 3 Output E sh icc eies oni AA E ERKAN 3 3 ALG 58 68 Cae ae pedo oe MEL ERE OS eee 3 3 AEG Control Ystxexcetinne tarsal yet aera Frequency Control se 0 Level Control RA RRR dance en Peak Norm Adjustment RF ON OFF Switch Remote HP IB Operation HP IB Compatibility 4 csac chleexkatecetta Remote Mode Addressing Data Messages Receiving Data Messages The Complete Data Message Receiving the Clear Message Receiving the Trigger Message Receiving the Remote Message Receivin
75. eeded for Flatness and ALC adjustment procedures and for performance testing Controllers that are supported by this manual include the HP 9826A 9836A and HP 85B 82937A The HP 11720A Support Kit is available for main taining and servicing the CW Generator It in cludes a special test extender board cables and adapters 1 12 RECOMMENDED TEST EQUIPMENT Table 1 3 lists the test equipment recommended for testing adjusting and servicing the CW Gener ator Essential requirements for each piece of test equipment are described in the Critical Specifica tions column Other equipment can be substituted if it meets or exceeds these critical specifications General Information HP 8671B Table 1 1 Specifications 1 of 3 Note Specifications apply after 1 hour warm up over the temperature range 0 to 55 C except specifications for RF output level which apply over the range 15 to 35 C Specifications for output flatness and absolute level accuracy apply only when internal leveling is used Electrical Characteristics Perfarmance Limits Conditions FREQUENCY Range 2 0 18 0 GHz Overrange to 18 599997 GHz Resolution 1 kHz 2 0 to 6 2 GHz 2kHz 6 2 to 12 4 GHz 3 kHz 12 4 to 18 0 GHz Accuracy and Stability Same as reference oscillator Switching Time Frequency to be within the lt 15 ms specified resolution 1 kHz in 2 0 to 6 2 GHz range etc Amplitude after switching lt 15 ms When switching within the same frequenc
76. een designed to be performed with a minimum of test equipment and in as short a time as possible Therefore although these checks are extremely valuable in identifying malfunctions they are not a substitute for the Performance Tests in Section IV which verify that the instrument is performing within its published specifications Each check is independent of the others and can be performed separately If a malfunction is suspected and the CW Generator is being returned to Hewlett Packard for service perform the entire procedure Document the checks that failed on a blue repair tag located at the rear of this manual and attach the tag to the instrument This will help ensure that the malfunction has been accurately described to service technicians for the best possible service Attenuator 10 dB 5c tanoey Heat wowed ew one HP 8491B Option 010 Turn On Check 1 Set the LINE switch to STANDBY Remove all external cables from the front and rear panels of the CW Generator including the power cable connecting the instrument to mains power 2 Set the rear panel FREQ STANDARD INT EXT switch to INT and connect the JUMPER A3W3 between A3J9 and A3J10 3 After the power cable has been disconnected from the CW Generator for at least 1 minute reconnect it to the CW Generator Check the front panel of the instru ment to verify that the STANDBY and OVEN status annunciators are on 4 Leave the instrument s LINE switch set to STANDBY
77. ending an 8 bit status byte when addressed to talk If SPD the instrument is holding the SRQ control line true issuing the Require Service message the RQS bit and the bit representing the condition causing the Require Service message to be issued will both be true Status Yes The CW Generator responds to a Parallel Poll Enable PPE bus PPE PP2 Bit command by sending a status bit on a switch selected HP IB data 3 18 line HD 8671B Operation Table 3 3 Message Reference Table 2 of 2 HP IB Appli i Message cable Response Yes The CW Generator stops talking and listening IFC Related Commands Interface and Funstions Contrals L4 LEO Commands Control lines and Interface Functions are defined in IEEE Std 488 1978 Knowledge of these may not be necessary if your controller s manual describes programming in terms of the twelve HP IB Messages shown in the left column Complete HP IB capability as defined in IEEE Std 488 and ANSI Std MC1 1 is SH1 AH1 T6 TEO L4 LEO DTO DC1 RL2 CO SR1 and PP2 Data Messages cont d local mode can be performed in remote mode via Data messages except changing the ALC CAL and PEAK NORM controls and the LINE switch setting 3 26 Receiving Data Messages The CW Generator responds to Data messages when it is enabled to remote REN control line true and addressed to listen The instrument remains addressed to listen u
78. ensor using this method Set the output level range to 0 dB and the ALC selector to PWR MTR Adjust the ALC CAL controls to set the level read on the power meter to the nearest 10 dBm This level should be within 3 dB and 10 dB of the desired level minus the coupling factor of the directional coupler This calibrates the CW Generator s meter to agree with the leveled power This power leveling method has a slow settling time but has the advantage of high sensitivity and temperature compensation If the ALC CAL control does not have enough range for a low power level adjust ment step the RANGE down until the adjustment can be made The ALC program code controls the function of the RF output ON OFF switch the ALC selector and the 10 dB range of output power The program string consists of the letter O followed by a single argument representing the desired combination of the control positions To set the CW Generator to the 10 dB range you must first set it to 0 dB with the range command code and argument KO Then you can set the 10 dB range with the appro priate ALC command The codes are summarized in the table under Program Codes POWER METER HP 86718 SYNTHESIZED CW_GENERATOR EXT ALC INPUT RF L OUTPUT _ aa DIRECTIONAL COUPLER Figure 3 4 External Leveling with a Power Meter 3 5 Operation HP 8671B Detailed Operating Instructions ALC CONTROL cont d Example To set internal ALC wi
79. equencies listed below and read the frequency counter at each step The frequency counter reading should agree with the CW Generator front panel reading within 1 count In addition the CW Generator NOT PHASE LOCKED front panel annunciator should remain off at all frequencies NOTE Fast tuning of frequency may cause the NOT PHASE LOCKED annunciator to flash on momentarily This is normal and does not indicate a malfunction Frequency Minimum Frequency Actual Frequency Maximum Frequency MHz MHz MiHz MHz 2 090 000 2 089 999 2 690 001 2 280 000 2 279 999 Ne ot a 2 280 001 2 470 000 2 469 999 A E ee 2 470 001 2 660 000 2 659 999 E ete cere ee 2 660 001 2 850 000 2 849 999 Se eet 2 850 001 3 040 000 3 039 999 E ee 3 040 001 3 230 000 3 229 999 PERT aye Pena er ae 3 230 001 3 420 000 3 419 999 3 420 001 contd 4 3 Performance Tests HP 8671B PERFORMANCE TESTS FREQUENCY RANGE AND RESOLUTION cont d Procedure contd Frequency Minimum Frequency Actual Frequency Maximum Frequency Z MHz MHz MHz i MHz 3 610 000 3 609 999 3 610 001 3 800 000 3 990 000 4 180 000 4 370 000 4 560 000 4 750 000 4 940 000 5 130 000 5 320 000 5 510 000 5 700 000 5 900 000 6 100 000 3 799 999 3 989 999 4 179 999 4 369 999 4 559 999 4 749 999 4 939 999 5 129 999 5 319 999 5 509 999 5 699 999 5 899 999 6 099 999 3 800 001 3 990 001 4 180 001 4 370 001 4 560 001 4 750 001 4 940 00
80. equired at power levels above 8 dBm To maximize the output power at a set frequency Adjust the PEAK NORM adjustment until the LVL UNCAL annunciator turns off or for maximum meter reading with the VERNIER fully clockwise This adjustment cannot be remotely programmed To peak an output level of 10 dBm at 8 GHz due to a LVL UNCAL indication 1 Adjust the PEAK NORM adjustment until the LVL UNCAL annunciator turns off or for maximum meter reading with the VERNIER fully clockwise 2 Return the PEAK NORM adjustment to NORM detented position before resuming normal instrument operation The 8 dBm output power level is affected by this adjustment and is only specified with the PEAK NORM adjustment set to NORM For output level settings above 8 dBm spurious oscillations can occur resulting in sidebands on the carrier at a level of 30 to 50 dBc These oscillations occur only over small portions of the frequency range They can usually be eliminated by performing a PEAK NORM adjustment or by reduc ing the output level VERNIER setting 1 or 2 dB The PEAK NORM adjustment must be in the NORM detented position to guarantee the specified 8 dBm level over the entire frequency range 3 15 Operation HP 8671B Detailed Operating Instructions 3 19 RF ON OFF SWITCH Description Local Procedure Remote Procedure Program Codes Comments 3 16 The RF ON OFF switch provides a convenient way of turning off the out
81. ever it will always be within 2 kHz of programmed value means that for a given program code the leading zero is supplied by the instrument s hardware Figure 3 5 Frequency Programming Codes and Arguments Comments Due to the use of frequency multiplication to generate frequencies above 6 2 GHz the frequency sometimes cannot be set precisely to a desired value Frequencies between 2 and 6 2 GHz can be set to the nearest 1 kHz All frequencies between 6 2 and 12 4 GHz can be set within 1 kHz of the desired value All frequencies between 12 4 and 18 GHz can be set within 2 kHz of the desired frequency When the CW Generator is programmed to a frequency that is not evenly divisible a random roundoff occurs To prevent this remote programming one should perform a calculation to determine whether the frequency can be set exactly To determine whether a frequency can be set to a given value divide the desired fre quency in kHz by two if it is between 6 2 and 12 4 GHz or by three if it is above 12 4 GHz IF the result is a whole number with no remainder the frequency can be set to the 3 10 HD 8671B Operation Detailed Operating Instructions FREQUENCY CONTROL cont d Comments desired value For example 16 GHz divided by three it is above 12 4 GHz is 5333333 33 cont d kHz so this frequency cannot be set exactly The nearest frequencies that can be set are 15 999999 GHz 5 333333 X 3 and 16 000002 GHz 5 333334 X 8 The t
82. from the string except for the first code and Z1 the frequency execute command if pro gramming frequency Thus the following string is equivalent to the one above P12345678Z197071 Furthermore the string can begin with any code and end with any argument and can be com posed of combinations of this syntax Thus the following string will program the CW Generator to a frequency of 2345 MHz with a VERNIER setting of 0 dBm without changing the output level RANGE setting Q2345Z1L3 3 27 Receiving the Clear Message The CW Generator responds to the Clear message by setting the frequency to 3 GHz ALC to inter nal and RF power off The message can take two forms Device Ciear which the CW Generator re 3 19 Operation Receiving the Remote Message contd sponds to only when addressed and Selected Device Clear which it responds to whether ad dressed or not The Device Clear message does not affect addressing while the Selected Device Clear message leaves the CW Generator addressed to listen 3 28 Receiving the Trigger Message The CW Generator does not respond to the Trigger message 3 29 Receiving the Remote Message The Remote message has two parts First the remote enable bus control line REN is held true second the device listen address is sent by the controller These two actions combine to place the CW Generator in remote mode Thus the CW Generator is enabled to go into remote when
83. g the Local Message Receiving the Local Lockout Message Receiving the Clear Lockout Set Local Message Cue Gkeasdan bale eae ae Receiving the Pass Control Message Sending the Require Service Message Sending the Status Byte Message Sending the Status Bit Message Receiving the Abort Message Operator s Checks Basic Functional Checks HP IB Checks Section IV PERFORMANCE TESTS Introduction Abbreviated Performance Test Calibration Cycle coset ncas Performance Test Record Equipment Required Ce ee Test Procedures 445 45 ana ve reeiesie tides Frequency Range and Resolution Test Frequency Switching Time Test Output Level High Level Accuracy and Flatness Test 0 dread A ereweeeaes ee ee Low Level Accuracy Test 005 Output Level Switching Time Test Harmonics Subharmonics amp Multiples Test Non Harmonically Related Spuricus Signals Test Power Line Related Spurious Signals Test Single Sideband Phase Noise Test Internal Time Base Aging Rate Ce svenssvrventay ee ssrsvevsstea Local Mod 65 aRar R Re resors RR The Abbreviated Data Message ed ee x Ke aK aK E aK KA RE RRC Y Ce HHHH HII CS K KaK KKK ARE AK Contents iba 3 19 E 3 19 TT 3 20 eee 3 20 nore 3 20 oe eee sted 3 20 Lik Contents HP 8671B ILLUSTRATIO
84. he CW Generator In addition an index to the Detailed Operating Instructions is provided to direct the user to the more complete discussion of the topic of interest Detailed Operating Instructions The Detailed Operating Instructions provide the complete oper ating reference for the CW Generator user The instructions are organized alphabetically by sub ject They are indexed by function in Table 3 2 3 5 Remote HP IB Operation The CW Generator is capable of remote operation via the Hewlett Packard Interface Bus HP IB HP IB is Hewlett Packard s implementation of the IEEE Standard 488 IEEE Standard Digital Interface for Programmable Instrumentation also described by the identical ANSI Standard MC1 1 For a more detailed information relating to programmable control of the CW Generator refer to Remote HP IB Operation in this section This section includes discussions on capabilities addressing input and output formats the status byte and service request In Table 3 4is a complete summary of programming codes In addition programming examples are given in HP IB Checks and in the Detailed Operating Instruction 3 6 Operators Checks Operator s Checks are procedures designed to verify proper operation of the CW Generator s main functions Two procedures are provided as described below Basic Functional Checks This procedure requires only a 50 ohm load or attentuator to perform For greater assurance
85. higher level to overcome the attenuation introduced by the range selected For output level settings above 8 dBm spurious oscillations can occur resulting in sidebands on the carrier at a level of 30 to 50 dBc These oscillations occur only over small portions of the frequency range They can usually be eliminated by performing a PEAK NORM adjustment or by reducing the output level VERNIER setting 1 or 2 dB Typical output level switching times are detailed under Level Control Enabling the RF output requires less than 30 milliseconds Disabling the RF output can be accomplished in less than 5 milliseconds The state of the RF output on or off and the status of the 10 dB range selected or not selected can be obtained by reading the status byte The status of the ALC circuitry leveled or not leveled can also be monitored by reading the status byte Once the status byte indicates that the output is leveled an application can continue without waiting the specified time for the output level to settle Level Control PEAK NORM Adjustment 3 7 Operation HP 8671B Detailed Operating Instructions 3 16 FREQUENCY CONTROL Description Local Procedure Remote Procedure The CW Generator uses a simple convenient frequency tuning system All frequencies can be remotely programmed or entered manually by a tuning knob The knob can be turned in either direction without encountering a mechanical stop Also the faster it is turned
86. ies the critical specifi cations given in the table may be substituted 4 6 TEST PROCEDURES It is assumed that the person performing the fol lowing tests understands how to operate the speci fied test equipment Equipment settings other than those for the CW Generator are stated in general terms For example a test might require that a spectrum analyzer s resolution bandwidth be set to 100 Hz however the sweep time would not be specified and the operator would be expected to set that control and other controls as required to obtain an optimum display It is also assumed that the technician will select the cables adapiers and probes listed in Table 1 3 required to com plete the test setups illustrated in this section 4 1 Performance Tests HP 8671B PERFORMANCE TESTS 4 7 FREQUENCY RANGE AND RESOLUTION TEST Specification Electrical Characteristics Performance Limits Conditions FREQUENCY Range 2 0 18 0 GHz Overrange in 18 599997 GHz Resolution 1 kHz 2 0 to 6 2 GHz 2kHz 6 2 to 12 4 GHz 3 kHz 12 4 to 18 0 GHz Description This test checks the resolution in each of three internal frequency bands using a frequency counter The performance test is divided into a baseband check 2 0 to 6 2 GHz and a check for bands 2 and 3 6 2 to 12 4 GHz and 12 4 to 18 0 GHz respectively Equipment Frequency Counter cece eee eee HP 5343A Procedure Baseband Test 1 Connect the equipment as shown in Figure 4
87. ime it takes to switch from one frequency to the next depends on the largest fre quency digit being changed Generally the smaller the digit being changed the shorter the switching time Typical switching times by largest digit being changed for frequen cies between 2 and 6 2 GHz can be summarized as follows Largest Digit Time to be Changed Within t kHz 100 MHz 10 ms For frequencies above 6 2 GHz actual frequency digits being changed must be deter mined by dividing the output frequency by two 6 2 to 12 4 GHz or three 12 4 to 18 GHz The actual data transfer time is only a small portion of the frequency switching time and can be ignored For applications that require fast execution the status byte can be checked until the frequency is phase locked Once the status byte indicates that the CW Generator is phase locked the application may continue with the assurance that the frequency is correct Figure 3 6 shows the typical worst case lock and settling times 10 MHz NOTE SWITCHING TIMES ARE TYPICALLY 1 MHz X MUCH SHORTER PARTICULARLY FOR V SMALL STEP SIZES 100 kHz ERROR FROM DESIRED C Frequency VET x C ed 1 kHz YL SWITCHING TIME 100 Hz 10 11 12 13 14 15 TIME ms Figure 3 6 Frequency Switching Time Showing Worst Case 3 11 Operation HP 8671B Detailed Operating Instructions 3 17 LEVEL CONTROL Description Local Procedure Remote Procedure
88. isted under SERIAL NUMBERS on the title page 1 5 MANUAL CHANGES SUPPLEMENT An instrument manufactured after the printing of this manual may havea serial number prefix that is not listed on the title page This unlisted serial number prefix indicates that the instrument is dif ferent from those documented in this manual The manual for this newer instrumentis accompanied by a Manual Changes supplement The supple ment contains change information that ex plains how to adapt this manual to the newer instrument In addition to change information the supplement may contain information for correcting errors in the manual To keep the manual as current and as accurate as possible Hewlett Packard recommends that you periodically request the latest Manual Changes supplement The supplement is identified with the manual print date and part number both 1 1 General Information MANUAL CHANGES SUPPLEMENT cont d of which appear on the manual title page Compli mentary copies of the supplement are available from Hewlett Packard For information concerning a serial number prefix that is not listed on the title page or in the Manual Changes supplement contact your nearest Hewlett Packard office 1 6 DESCRIPTION The HP 8671B Synthesized CW Generator has a frequency range of 2 0 to 18 0 GHz The output is leveled and calibrated from 8 dBm to 120 dBm Frequency output level and ALC modes can be remotely programmed vi
89. ment specifications are listed in Table 1 1 These specifications are the performance stand ards or limits against which the instrument may be tested Supplemental characteristics are listed in Table 1 2 Supplemental characteristics are not warranted specifications but are typical charac teristics included as additional information for the user 1 3 SAFETY CONSIDERATIONS This product is a Safety Class I instrument that is one provided with a protective earth terminal The CW Generator and ali related documenta tion should be reviewed for familiarization with safety markings and instructions before opera tion Refer to the Safety Considerations page found at the beginning of this manual for a sum mary of the safety information Safety informa tion for installation operation performance test ing adjustment or service is found in appropriate places throughout this manual 1 4 INSTRUMENTS COVERED BY THIS MANUAL Attached to the rear panel of the instrument is a serial number plate The serial number is in the form 0000400000 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 con figuration change is made to the instrument The suffix however is assigned sequentially and is different for each instrument The contents of this manual apply directly to instruments having the serial number prefix es l
90. n IEEE Standard 488 1978 1 2 HP 8671B IEEE Standard Digital Interface for Program mable Instrumentation or the identical ANSI Standard MC1 1 For more detailed information relating to programmable control of the CW Gener ator refer to Remote Operation Hewlett Packard Interface Bus in Section ITI of this manual 1 7 OPTIONS 1 8 Mechanical Options The following options may have been ordered and received with the CW Generator If they were not ordered with the original shipment and are now desired they can be ordered from the nearest Hewlett Packard office using the part numbers included in each of the following paragraphs Option 907 Front Handle Kit Ease of handling is increased with the front panel handles The Front Handle Kit part number is 5061 9689 Option 908 Rack Flange Kit The CW Generator can be solidly mounted to the instrument rack using the flange kit The Rack Flange Kit part number is 5061 9677 Option 909 Rack Flange and Front Handle Combi nation Kit This is a unique part which combines both functions It is not simply a front handle kit and arack flange kit packaged together The Rack Flange and Front Panel Combination Kit part number is 5061 9688 1 9 ACCESSORIES SUPPLIED The accessories supplied with the CW Generator are shown in Figure 1 1 a The lme power cable is supplied in several configurations depending on the destination of the original shipment Refer to Power Cable
91. n these tests Equipment Local OSCllator docceuetiaceteerieaons HP 8340A Low Frequency Spectrum Analyzer HP 3580A High Frequency Spectrum Analyzer HP 8566B Sep 2 6 oss RTA wee RVR RHG DMS1 18 4 31 Performance Tests HP 8671B PERFORMANCE TESTS SINGLE SIDEBAND PHASE NOISE TEST cont d NOTE The signal to phase noise ratio as measured must be corrected to com pensate for 8 errors contributed by the measurement system These are a Using the spectrum analyzer in the log mode requires a 2 5 dB correction b Equal noise contributed by the local oscillator requires a 3 dB correction c The spectrum analyzer noise measurement must be normalized to a 1 Hz noise equivalent bandwidth The noise equivalent bandwidth for HP spectrum analyzers is 1 2 times the 3 dB bandwidth For a 3 Hz bandwidth the correction factor for the normalized mea surement bandwidth would be Normalizing Factor dB 10 log 1 2 X 3 Hz 1Hz 5 56 dB The total correction for 8 Hz bandwidth would be True measurement dBc Reading dBc 5 56 2 5 3 Reading dBc 6 06 dB Procedure 1 Set the low frequency spectrum analyzer s start frequency to 40 kHz resolution bandwidth to 1 Hz and frequency span per division to 5 Hz 2 Connect the equipment as shown in Figure 4 12 NOTE Connect the mixer directly to the local oscillator to avoid any power loss SPECTRUM ANALYZER LOCAL OSCILLATOR HP 867 E LEE nann G
92. nUUe SOLWLS uoHNnjosed Bul UN Pajosjes 4asn YM Aouaenb 344 sebueyo 1071009 ONINAL ZH JO ZH OL ZHN L ZHW OOL 10 GUB 0 Yo WoL uoIINjosei Burun 179195 sAey NOILLNIOSAY AONSNOSAYS Aouenbe j jndino 4H S9189 ipui Aejdsip ZHN AONANOSHA sainjeay jeueg 10014 1 6 anb Buena 4970W amod BUIB X9 JO APOIP eUdE x9 BUJOTU S179199 YOUMS OV sA8y uonnjosa Aduenbedj Aq papaes uolinjoses Burung sejyeolpul seg yb1 Aejdsip NOILNIOSSY AONSNOSES uUoI BIgIeO Bulon peusayxe s sn pe jo1 U09 TWD JeuBbis Bunara O Vy eusa xe sjdeoor 4OJDOUUOS NaN DOTY 1X4 papyeiqijeo jou pug pa aagj JOu S jNd NO JH eui yey sojeoipul JO BIOUNUUB FWONN JAT AdO 49 NO S dt Je4 04M s pui 0e unuuUeL JH SNn 8 S jeuoijesedo pue spow O Fy 9189 Pul SUO BJOUNUUB 4H PUB OV JO4JUOD G dH JOPUN gp S uonnjos y abues Wap C 01 0l SNONUI UOD 9 JBAO pndyno sisnipe YSINYAA TSAR7 LAdLNO sdajs P OL Ul WEP 0Z L 0 C L woi ndino S OS FONVY 73437 LAdLNO SOURLUIOJIEd HRJ9A0O 1990 JO UOHISOd WHON asn Aouenb 04 UO Aue 19 indino amod syead 04 U09 WHON WV3d ZH O 81 01 O g 10 buv Aouenbelj J8A0 SGOUy HAINHSA pue AONVY UUM Wap O i QL 8 Wo4 90915 GP OL Ul payOsUOO SI INGING 40 D8UU0D LNdLNO dH s9mod asiaaes Aue Ajdde jou op Aj N9419 fBUFE U JO UOHPOe ONd 1590 JO 42ABMOH AAL 0 dN suong ddeg amod asion WO p303 O1d S LNd LNO JH au L JAO SI LAd L
93. ngle Sideband Phase Noise Test Setup 4 32 Worst eT 3 11 4 13 Internal Time Base Aging Rate 3 7 Frequency Checks Test Setup 3 23 Test Soup od s Sa fod dR R A AAA aE 4 36 TABLES Table Page Table Page 1 1 Specifications 0c cece eee eee 1 4 3 4 Programming Quick Reference Guide 3 21 1 2 Supplemental Characteristics 1 7 1 3 Recommended Test Equipment 1 8 4 1 Output Level High Level Accuracy and Flatness Test Record 4 14 2 1 Allowable HP IB Address Codes 2 3 43 Tow Level Acrureey Test Record aed 4 19 3 1 Operating Characteristics 3 1 4 3 Harmonics Subharmonics amp Multiples 3 2 Index of Detailed Operating Instructions 3 1 Test Record ic sone Dies ge hw bea 4 25 3 3 Message Reference Table 3 18 4 4 Performance Test Record 4 38 iv HP 8671B Safety Considerations SAFETY CONSIDERATIONS GENERAL This product and related documentation must be reviewed for familiarization with safety markings and instructions before operation This product is a Safety Class I instrument pro vided with a protective earth terminal BEFORE APPLYING POWER Verify that the product is set to match the avail able line voltage and the correct fuse is installed SAFETY EARTH GROUND An uninterruptible safety earth ground must be provided from the main power source to the pro duct input wiring
94. ngs may exceed 3 5 mA Figure 2 1 Line Voltage and Fuse Selection 220 240V 220 240V OPERATION OPERATION PLUG SEV 1011 1958 24507 TYPE 12 PLUG NZSS 198 AS C112 CABLE HP 8120 1369 CABLE HP 8120 2104 220 246V OPERATION PLUG CEE7 VII CABLE HP 8120 1689 PLUG NEMA 5 15P CABLE 8120 1378 PLUG DHCK 107 CABLE HP 8120 2956 HP 8671B Power Cables cont d cabinet The power cable plug shipped with each instrument depends on the country of destination Refer to Figure 2 2 for the part numbers of power cables available 2 7 HP IB Address Selection AN In the CW Generator the HP IB talk and listen addresses and the parallel poll sense and re sponse line can be selected by internal switches Refer to Table 2 1 for a listing of talk and listen addresses The address is factory set for a Talk address of S and a Listen address of 3 In octal this is 23 in decimal this is 19 To change the HP IB address or to select a dif ferent parallel poll response proceed as follows Internal switch settings should be changed only by service trained persons who are aware of the potential shock hazard of working on an instrument with protective covers removed To avoid hazardous electrical shock the line mains power cable should be disconnected before attempting to change any internal switch settings 100 120V 220 240V OPERATION OPERATION PLUG NEMA 6 15P CABLE HP 81
95. nterface are working properly The select code of the controller s HP IB interface is assumed to be 7 The address of the CW Generator is assumed to be 19 its factory set address This particular select code address combination that is 719 is not necessary for these checks to be valid However the program lines presented here must be modified for any other com bination Instructions for changing the address are in Section II Installation These checks can be performed together or separately Any special requirements for a check are described at the beginning of the check The test setup is the same for all of the HP IB Checks Connect the the CW Generator to the controller and set the CW Generator as follows l RF Output switch ON PRAK NORM control NORM in detent OUTPUT LEVEL RANGE selector fully counter clockwise OUTPUT LEVEL VERNIER fully clockwise ALC selector INT CAL control fully clockwise Frequency 6000 000 MHz HP IB Controller Interface EEE HP 85B 82987A or HP 9826A Option 011 BASIC 2 0 ROM Operating System Or HP 9836A with BASIC 2 0 Operating System Remote and Local Message NOTE 3 26 This check determines whether the CW Generator properly switches from local to remote control and from remote to local control If the instrument is in remote switch the LINE switch to STANDBY then to ON HP 8671B Operation OPERATOR S CHECKS HP IB Checks cont d HP 9825A BASIC
96. ntil it receives an Abort message or until its talk address or a universal unlisten command is sent by the con troller A data message is a string of alternate codes and arguments where a code is an ASCII character representing a function such as frequency RF output level or ALC mode and an argument is an ASCII digit representing a selection of the function Each code and its argument make a command A complete summary of programming formats codes and arguments is given in Table 3 4 In addition programming examples are given in HP IB Checks and in the Detailed Operating Instructions The Complete Data Message The following pro gram string is a complete data message It lists the commands in the order that the CW Gener ator decodes them along with arguments that will be explained P1Q2R384T5U6V7W8ZIKISLTMONTOL The commands preceeding Zl program a fre quency of 12345 678 MHz Z1 is a frequency exe cute command which is required to execute a string of frequency commands K9 and L7 pro gram output RANGE and VERNIER to 90 dB and 4 dBm respectively MO and N7 are used to program AM and FM in the HP 8672A a similar synthesized signal generator with AM and FM capabilities and are used as dummy commands to make program strings compatible with the HP 8672A The O1 command programs ALC to inter nal leveling The Abbreviated Data Message If functions are programmed in the order listed codes can be omitted
97. o consider the performance tests valid the following conditions must be met a The CW Generator must have a 1 hour warmup for all specifications b The line voltage must be 100 120 220 or 240 Vac 5 10 c The ambient temperature must be 15 to 385 C for the Output Level Flat ness and RF Output Level and Accuracy tests 0 to 55 C for all other tests 4 3 CALIBRATION CYCLE This instrument requires periodic verification of performance to ensure that it is operating within specified tolerances The performance tests de scribed in this section should be performed at least once each year under conditions of heavy usage or severe operating environments the tests should be more frequent Adjustments that may be re quired are described in Section V Adjustments 4 4 PERFORMANCE TEST RECORD Results of the performance tests may be tabulated in Table 4 3 Performance Test Record The Per formance Test Record lists all of the performance test specifications and the acceptable limits for each specification If performance test results are recorded during an incoming inspection of the in strument they can be used for comparison during periodic maintenance or troubleshooting The test results may also prove useful in verifying proper adjustments after repairs are made 4 5 EQUIPMENT REQUIRED Equipment required for the performance tests is listed in Table 1 3 Recommended Test Equipment Any equipment that satisf
98. onding start frequency to the stop frequency Each time verify that the NOT PHASE LOCKED annun ciator remains off Each phase locked loop is tuned over its entire range HP 8671B Operation OPERATOR S CHECKS Procedure a Gy contd FREQUENCY RESOLUTION Start Frequency Stop Frequency ZL 22 23 24 25 26 27 e o 10 kHz 2000 010 MHz 2001 000 MHz 1 MHz 2001 000 MHz 2100 000 MHz i i 100 MHz 2100 000 MHz 6200 000 MHz Set the frequency to 18599 997 MHz overrange Verify that the NOT PHASE LOCKED annunciator remains off Output Level Check The CW Generator s internal output leveling loop ALC is checked to ensure that it remains locked at all specified power levels The internal output leveling loop monitors most of the RF output circuitry The output level can be monitored with a power meter for greater assurance that the CW Generator is operating properly Press PRESET 3 GHz Set the CW Generator as follows RF OUTPUT ON PEAK NORM control NORM in detent OUTPUT LEVEL RANGE selector fully counter clockwise OUTPUT LEVEL VERNIER fully counter clockwise ALC selector INT ALC CAL control fully clockwise Connect a 50 ohm load or attenuator to the CW Generator s RF OUTPUT con nector This reduces unwanted power reflections back into the RF OUTPUT connector thus avoiding a false LVL UNCAL annunciator indication Tune the frequency to 6200 000 MHz Using the OUTPUT LEVEL RANG
99. or example normal blow time delay etc Do not use repaired fuses or short circuited fuseholders SAFETY SYMBOLS A N Instruction manual symbol the product will be marked with this symbol when it is necessary for the user to refer to the in struction manual see Table of Contents for page references Indicates hazardous voltages Indicates earth ground terminal tk We The WARNING sign denotes a WARNING hazard It calls attention to a procedure practice or the like which if not correctly performed or adhered to could result in per sonal injury Do not proceed be yond a WARNING sign until the indicated conditions are fully understood and met The CAUTION sign denotes a hazard It calls attention to an operating procedure practice or the like which if not correctly performed or adhered to could result in damage to or destruc tion of part or all of the product Do not proceed beyond a CAU TION sign until the indicated conditions are fully understood and met CAUTION General Information HP 8671B GENERATOR AUNE SOH essa SESE arenes oo Rigi OAT HP 86718 LINE POWER CABLE OPTION 907 FUSE FRONT HANDLE KIT anataet OPTION 908 OPTION 909 RACK FLANGE KIT RACK FLANGE AND FRONT HANDLE COMBINATION KIT Figure 1 1 HP Model 86718 Accessories Supplied and Options 907 908 and 909 HD 8671B General Information SECTION GENERAL INFORMATIO
100. ough 4 at the other CW Generator frequencies listed to check each harmonic subharmonic and multiple listed in the following table Record the measurements in Table 4 3 4 23 Performance Tests HP 8671B PERFORMANCE TESTS ner rere HARMONICS SUBHARMONICS amp MULTIPLES TEST cont d Procedure NOTE Conta This procedure may be repeated for any fundamental frequency of interest within the CW Generator frequency range Harmonics Subharmonics and Multiples Set Signal Generator to Check Harmonic Levels at FUNDAMENTAL HARMONIC SUBHARMONIC MULTIPLE GHz GHz 1 2 2 3 2 000 000 4 000 000 6 000 000 8 000 000 10 000 000 11 000 000 14 000 000 16 000 000 4 000 000 8 000 000 12 000 000 16 000 000 20 000 000 22 000 000 4 666 667 5 333 333 6 000 000 9 333 333 10 666 667 12 000 000 18 000 000 LIMITS 25 dBc 4 24 HP 8671B Performance Tests PERFORMANCE TESTS HARMONICS SUBHARMONICS amp MULTIPLES TEST contd Test Harmonic Fundamental or Subharmonic 2 000 000 GHz 4 000 000GHz 2f ERO aE 4 000 000 GHz 8 000 000 GHz 2f ee ie ar 25 dBe 6 000 000 GHz 12 000 000 GHz 2f es EC 8 000 000 GHz 16 000 000 GHz 2f 2 Bee 8 000 000 GHz 4 000 000 GHz 1 2f n 95 dBe 10 000 000 GHz 20 000 000 GHz 2f po 25 Be 10 000 000 GHz 5 000 000 GHz 1 2f 95 Be 11 000 000 GHz 22 000 000 GHz 2f 95 dBe 11 000 000 GHz 5 000 000 GHz 1 2 96 dBe 14 000 000 GHz 4 666 667 GHz 1 3f 2
101. put signal This is useful when calibrating detectors zeroing power meters or making noise mea surements with no signal applied With the switch in the off position the internal 2 to 6 2 GHz oscillator is turned off to prevent any signal leakage to the RF output connector The RF annunciator indicates the position of the RF ON OFF switch in local mode and the programmed state when in remote mode With the internal 2 to 6 2 GHz oscillator turned off the CW Generator is no longer phase locked or leveled so the LVL UNCAL and NOT PHASE LOCKED annunciators are lighted To disable the RF output Set the RF ON OFF switch to OFF Note that the OFF LVL UNCAL and NOT PHASE LOCKED annunciators should be lighted To enable the RF output Set the RF ON OFF switch to ON The LVL UNCAL and NOT PHASE LOCKED annunciators should extinguish and the ON annunciator should light See ALC Control for a description of how to program the RF ON OFF switch function See ALC Control The status of the RF output on or off can be determined by reading the status byte A service request is not generated for LVL UNCAL or NOT PHASE LOCKED when the RF output is set to OFF The RF output off to on transition typically requires less than 30 milliseconds when remotely programmed The on to off transition typically requires less than 5 milli seconds HP 8671B 3 20 REMOTE HP 1B OPERATION The CW Generator can be operated through the Hewlett Packard Interf
102. range NOTE A digitizing oscilloscope will make this measurement easier due to the ability to store and view the switching process The test may be performed without a digitizing oscilloscope by repetitively switching the frequency of the unit under test Equipment HP IB Controller dE HP 85B 82903 or HP 9836A Local Oscillator nesssessnssssrsrnne HP 8340A Mixer 2 2 7 5 R ed bi o E A Oaoa RHG DMS1 18 Oscilloscope 06 4854 Enda See Neen HP 1980B 4 5 Performance Tests HP 8671B PERFORMANCE TESTS FREQUENCY SWITCHING TIME TEST cont d Procedure HP 1B CONTROLLER HP 1B INTERCONNECT HP IB PIN 6 CABLE LOCAL OSCILLATOR YNTHES1 ZED OR FREQUENCY 10 MHz STANDARD EXT OUT I RF OUTPUT OSCILLOSCOPE IF EXTERNAL TRIGGER VERTICAL i INPUT A Figure 4 2 Frequency Switching Time Test Setup Frequency Switching Time 1 Set up the equipment as shown in Figure 4 2 The external trigger input of the oscilloscope should be connected to pin 6 of the HP IB cable An HP IB adapter HP 10834A can be used to make a permanent adapter for this test This test may be performed by connecting the external trigger input of the oscilloscope to A2A7TPI1 The test results should be identical for both methods of oscilloscope triggering z oa WARNING To access A2A7TPI the instruments protective covers must be re moved This should only be done by service trained personnel who are aware of the hazards in
103. rce Refer to Figure 2 1 Line Voltage and Fuse Selection Fuses may be ordered under HP part numbers 2110 0008 3 0A 250V for 100 120 Vac operation and 2110 0048 1 5A 250V for 220 240 Vac opera tion 2 6 Power Cables BEFORE CONNECTING THIS IN STRUMENT the protective earth ter minal of this instrument must be con nected to the protective conductor of the mains power cables The mains plug shall only be inserted in socket outlets provided with a protective earth con tact The protective action must not be negated by the use of an extension cord power cable without a protective con ductor grounding This instrument is equipped with a three wire power cable When connected to an appropriate ac power receptacle this cable grounds the instrument 2 1 Installation Operating voltage is shown in module window SELECTION OF OPERATING VOLTAGE 1 Open cover door pull the FUSE PULL lever and rotate to left Remove the fuse Remove the Line Voltage Selection Card Position the card so the line voltage appears at top left corner Push the card firmly into the slot Rotate the FUSE PULL lever to its normal position Insert a fuse of the correct value in the holder Close the cover door iia WARNING To avoid the possibility of hazardous electrical shock do not operate this instrument at line vol tages greater than 126 5 Vac with line frequencies greater than 66 Hz leakage currents at these line setti
104. resses are set to 23 decimal 19 Therefore the listen address is 3 and the talk address is Installation d If the parallel poll sense or response switches are to be changed remove any HP IB cables or connectors from the HP IB connector and remove the HP IB connector Then remove the A2A9 Board Assembly e The PARALLEL POLL SENSE switch 84 is set to either the OFF 0 zero or 1 one position The zero position provides a false 2 5 to 5 volts output on the asserted HP IB data line the one position provides a true 0 to 0 4V output on the asserted HP IB data line f The PPR Parallel Poll Response switch 3 is set to select one of eight lines one of 1 through 8 of the HP IB data bus The selected line passes the CW Generator s parailel poll response to the HP IB controller g Re install the A2A9 Assembly and HP IB connector h Replace the A2 Assembly s internal cover the instrument s top cover and rear standoffs Figure 2 3 HP IB Address Switches Shown as Set by the Factory 2 8 interconnections Interconnection data for the Hewlett Packard Inter face Bus is provided in Figure 2 4 2 9 Mating Connectors HP IB Interface Connector The HP IB mating connector is shown in Figure 2 4 Note that the two securing screws are metric Coaxial Connectors Coaxial mating connectors used with the CW Generator RF output should be 500 Type N male connectors 2 10 Operating Environmen
105. rformance Tests HP 8671B PERFORMANCE TESTS POWER LINE RELATED SPURIOUS SIGNALS TEST cont d Procedure cont d 4 30 8 10 11 12 Set the spectrum analyzer frequency span per division to 50 Hz Set the spectrum analyzer controls so that the peak of the 20 kHz signal is at the top graticule line Verify that the line related spurious signals of the CW Generator do not exceed the values shown below Record the highest spurious signal level in each offset band 6 2 12 4 GHz lt 300 Hz offset frequency mmm 44 dBe 300 Hz 1 kHz offset frequency ss 54 dBe Set the spectrum analyzer frequency span per division to 500 Hz Measure and record the spurious signal levels 6 2 12 4 GHz gt 1 kHz offset frequency _ ____ 59 dBe Tune the CW Generator and the local oscillator to 16 000 000 MHz and 16 000 020 MHz respectively Set the spectrum analyzer frequency span per division to 50 Hz Set the spectrum analyzer controls so that the 20 kHz signal is at the top graticule line Verify that the line related spurious signals of the CW Generator do not exceed the values shown in the table Record the highest spurious signal level in each offset band 12 4 18 0GHz lt 300 Hz offset frequency 40 dBe 300 Hz 1 kHz offset frequency a 50 dBe Set the spectrum analyzer frequency span per division to 500 Hz Measure and record the spurious signal levels 12 4 18 0 GHz gt 1 kHz offset frequency _____
106. rogramming an illegal frequency P9921 P99Z1 Send the parallel poll message to the PPOLL 7 PPOLIA7 CW Generator causing it to send the Status Bit message OPERATORS Check that the controller displays 128 or the value of the bit that parallel poll RESPONSE switch is set to 3 30 HP 8671B Performance Tests SECTION IV PERFORMANCE TESTS 4 1 INTRODUCTION The procedures in this section test the instrument s electrical performance using the specifications of Table 1 1 as the performance standards These tests are suitable for incoming inspection trouble shooting and preventive maintenance All tests can be performed without accessing the interior of the instrument A simpler operational test is in cluded in Section ITI under Operator s Checks 4 2 ABBREVIATED PERFORMANCE TEST In most cases it is not necessary to perform all of the tests in this section The following tests should be performed after repairing the CW Generator or to verify instrument operation FREQUENCY RANGE AND RESOLUTION OUTPUT LEVEL HIGH LEVEL ACCURACY AND FLATNESS These tests can also be used for incoming inspec tions and preventative maintenance They are not intended to be a complete check of specifications but will provide 90 confidence that the CW Generator is meeting its major performance speci fications These tests can be performed with less time and equipment than the full Performance Tests NOTE T
107. s are incomplete if there is mechanical damage or defect or if the instru ment does not pass the electrical performance test notify the nearest Hewlett Packard office If the shipping container is damaged or the cushioning material shows signs of stress notify the carrier as well as the Hewlett Packard office Keep the shipping materials for the carrier s inspection 2 3 PREPARATION FOR USE 2 4 Power Requirements The CW Generator requires a power source of 100 120 220 or 240 Vac 5 to 10 48 to 66 Hz single phase Power consumption is 300 VA maximum 1 WARNINGS This is a Safety Class I product that is provided with a protective earth termi nal An uninterruptible safety earth ground must be provided from the main power source to the product input wir ing terminals power cord or supplied power cord set Whenever it is likely that the protection has been impaired the product must be made inoperative and be secured against any unintended operation If this instrument is to be energized via an external autotransformer make sure the autotransformer s common terminal is connected to the neutral that is the grounded side of the mains supply 2 5 Line Voltage and Fuse Selection CAUTION BEFORE PLUGGING THIS INSTRUMENT into the mains line voltage be sure the cor rect voltage and fuses have been selected Verify that the line voltage selection cards and the fuses are matched to the power sou
108. s in Section H of this manual b An additional fuse is shipped only with instruments that are factory configured for 100 120 Vac operation This fuse has a 1 5A rating and is for reconfiguring the instrument for 220 240 Vac operation c Four extender boards are supplied for per formance testing adjusting and troubleshooting the instrument 1 One 30 pin 15 x 2 extender board HP part number 08672 60117 HP 8671B ACCESSORIES SUPPLIED cont d 2 Two 36 pin 18 x 2 extender boards HP part number 08672 60020 3 One 3 section 30 pins 15 x 2 per section extender board HP part number 08672 60016 for use in the A2 Assembly 1 10 ACCESSORIES AVAILABLE Chassis Slide Mount Kit This kit is not available as a factory installed option However it is extremely useful when the CW Generator is rack mounted Access to internal circuits and components or the rear panel is possible with out removing the CW Generator from the rack Order HP part number 1494 0059 If the instru ment rack mounting slides are to be mounted in a standard EIA rack then an adapter HP Part No 1494 0061 is needed The slides without the adapter can be directly mounted in the HP sys tem enclosures General Information 1 11 ELECTRICAL EQUIPMENT AVAILABLE The CW Generator has an HP IB interface and can be used with any HP IB compatible comput ing controller or computer for automatic systems applications The HP IB Controller is n
109. sn aq pynoys JU LINI PIDA pasinbad IY YPM sasn MOQ Jousou A 097 OM XHM DUOSLad Ul INSI PINOJ IVY pavZDY YDOYS 1017 Ua 0d D ISNDI 190 SUuIpunoss YiAva 2014091040 ayy fo uondns1aqUt AUY 199709 PEPUNOAT YJADI 301499104 D OF PIJISUUOI ag PINOYs 72 0 PIZDIUUOI SINNAIP PUD SLBULLOJSUDAJOIND S P409 UOISUIJX SJOU 7491 YIADE 2014091040 77D UO PaYydTIMS 81 uaunaysul IY aLofag S NINYYM SNOLLONULSNINO NHNL 6 6 uoHisod 90NY LS U aliym uo USAO 10 8 19S0 SOUBJOJOI GUJSLU1 y sd y osye 11 yO pue uo JUBLUNIISU Sy suin YOHUMS gN A910910 uoinjoses Aouanboas ay seysinb Ul X8 Puke jO4jJUOS Burun su S8IGESIP OSE H ZHI O00 O00 0 Aouanba j sjas Aay LJSHAHd Apidsip uonnjoses Aouanbes y saysinBulyxe pug jo4juo0o Hulun Aguanbas sajqesip o QIOH uomsod 1X3 eu u S HOLIMS LXS LNI GHVONV LS AONSNOAYS ued 1691 By Jey seyeoipul 440 434 TWNYSLN UOIHSOd 440 ey UI S YOHMS LAALNO dy 84 10 79914109 10U s Aduanbe Indino aui yeu So BOIPUl GAWOO71 ASVHd LON uolisod AS GNVLS oUi f SI Yo UMS SANIT 24 ing pejosuuos s Jamod Jey S8 BOIPUL AGANYLS J9 JOLJUOO Gi dH ue Aq uoljeiedo Jo w 0 199 SI JUBWNYsU SU Jeu SezeOIPU FLOWS peuueiBoid Ajajoules useq sey Aouenbely abuei jo jno ue yey SOIZOIPU AONVY JO LNO ounjesedwe Bunesedo o dn JOU Si USAO SJOIBIPOSO BOUdIEJaI JBUL9 UI OY YY SOBOIPU NA AO JUBLUNJISU JO smes jeuoneado aleolpul syoyeIOUN
110. t The operating environment should be within the following limitations 2 3 Installation Operating Environment cont d Temperature e e Kes MEM 0 to 55 C Hamidity exc ete ties eerie lt 95 relative Altitude lt 4570 metres 15 000 feet NOTE Specifications for RF Output apply only between 16 and 35 C 2 11 Bench Operation The instrument cabinet has plastic feet and fold away tilt stands for convenience in bench opera tion The plastic feet are shaped to ensure self aligning of the instruments when stacked The tilt stands raise the front of the instrument for easier viewing of the front panel 2 12 Rack Mounting WARNING The CW Generator weighs 27 2 kg 60 lbs therefore extreme care must be exercised when lifting to avoid personal injury Use equipment slides when rack mounting the instrument Rack mounting information is provided with the rack mounting kits If the kits were not ordered with the instrument as options they may be ordered through the nearest Hewlett Packard office Refer to the paragraph entitled Mechanical Options in Section I 2 13 STORAGE AND SHIPMENT 2 14 Environment The instrument should be stored in a clean dry environment The following environmental lim itations apply to both storage and shipment Temperature 4 vices ids edesaddas 55 to 75 C Humidity eopdso eee he eG hed we lt 95 relative Altitude aaaea 15 300 metres 50 000 feet 2
111. t Frequency 2 0 6 2 GHz lt 300 Hz offset 300 Hz 1 kHz offset gt 1 kHz offset 6 2 12 4 GHz lt 800 Hz offset 300 Hz 1 kHz offset gt 1 kHz offset 12 4 18 0 GHz lt 300 Hz offset 300 Hz 1 kHz offset gt 1 kHz offset 4 42 HD 8671B Performance Tests Table 4 4 Performance Test Record 6 of 6 Results Para Test Actual SINGLE SIDEBAND PHASE NOISE 10 Hz offset from carrier 6100 MHz 12 200 MHz 18 000 MHz 100 Hz offset from carrier 6100 MHz 12 200 MHz 18 000 MHz 1 kHz offset from carrier 6100 MHz 12 200 MHz 18 000 MHz 10 kHz offset from carrier 6100 MHz 12 200 MHz 18 000 MHz 100 kHz offset from carrier 6100 MHz 12 200 MHz 18 000 MHz m INTERNAL TIME BASE AGING RATE ma 5x10 day 4 43 4 44
112. t be kept constant External ALC reduces power variations due to external cables and connectors The ALC switch selects the leveling mode Positive or negative detectors can be used to supply the external ALC input voltage A calibration adjustment allows the externally leveled power to be adjusted to match the VERNIER setting over a limited output power range The calibration adjustment does not affect internal leveling ALC mode and status are indicated by the ALC display The display indicates which leveling source is selected and when the output is unleveled The status of the ALC whether leveled or unleveled can also be determined remotely by reading the status byte Local To use Internal Leveling Procedure Set the ALC selector to INT The output level will be the sum of the range and VERNIER settings To use XTAL External Crystal Leveling 1 Connect the crystal detector and the 10 dB coupler as shown in Figure 3 3 2 Set the ALC selector to INT and adjust the VERNIER to read 0 dBm on the meter This allows calibration of the meter to the leveled point Set the output level range to 0 dB and the ALC selector to XTAL Adjust the ALC CAL control to set the level read on the power meter to the nearest 10 dBm Ifthe ALC control does not have enough range for a low power level adjust ment step the RANGE down until the adjustment can be made This level should be within 3 dB and 10 dB of the desired level This calibrates
113. t the CW Generator to the mixer as shown in Figure 4 6 6 Set the local oscillator to 2 000 100 MHz and output power to maximum but not greater than 8 dBm 7 Setthe resolution bandwidth on the spectrum analyzer to 300 Hz or less Adjust the reference level so that the amplitude of the 100 kHz IF signal is set to a convenient horizontal graticule as a reference This calibrates the graticule line for an absolute reference power level of 20 dBm Enable the Delta Marker function on the spectrum analyzer if available for highest accuracy 8 Set the range of the CW Generator 10 dB lower and adjust the CW Generator s VERNIER for a front panel meter reading of 0 dBm 9 Set the spectrum analyzer reference level 10 dB lower to bring the signal level near the reference graticule line 4 17 Performance Tests HP 8671B PERFORMANCE TESTS LOW LEVEL ACCURACY TEST cont d Procedure 10 cont d it 12 13 14 15 16 17 4 18 Read the difference between the displayed level and the reference graticule Cal culate the actual power as follows NOTE The difference is positive if the signal is above the reference graticule line and negative if below Output level set in step 8 F Difference measured in step 10 Actual level Record the actual level calculated in Table 4 2 The level reading should be within the limits specified Repeat steps 8 through 10 with CW Generator range settings of
114. t the PEAK NORM control or decrease the the VERNIER setting Typical output level range change execution time for a 10 dB step is less than 20 milli seconds An output level VERNIER change of 1 dB will take less than 10 milliseconds These times are typical for remote programming The actual data transfer time is a very small part of the execution time and may be ignored for most controllers The RF output changing from enabled to disabled takes less than 5 milliseconds To enable the RF output from a disabled state requires less than 30 milliseconds The state of the RF output on or off and the 10 dB range selected or not selected can be obtained by reading the status byte These two functions are programmed along with the ALC mode For more information see ALC Control ALC Control PEAK NORM Adjustment HP 8671B Operation Detailed Operating Instructions 3 18 PEAK NORM ADJUSTMENT Description Local Procedure Remote Procedure Example Comments The PEAK NORM control adjusts an internal filter for maximum power output ata single frequency This filter is adjusted for best over all performance with the controlin the detent position NORM but can be adjusted for maximum power and reduced harmonics and sub harmonics at any one frequency This adjustment will result in lower maximum power at most other frequencies and therefore should be left in the NORM position except when maximum power is needed It should only be r
115. th an output level of 3 dBm Local Set ALC selector to INT RF output to ON range to 0 dB and VERNIER for 3 dBm Or Set ALC selector to INT RF output to ON range to 10 dB and VERNIER to 7 dBm Argument for ALC INT NORMAL Code for ALC Argument for VERNIER 3 dBm Code for VERNIER Argument for RANGE 0 dB Code for RANGE L Argument for ALC INT 10 dB Range Code for ALC Argument for VERNIER 7 dBm Code for VERNIER Argument for RANGE 0 dB Code for RANGE Program Codes HP IB ALC Mede Program Cade Argument O or letter O not zero INT XTAL PWR MTR 3 6 HP 86718 Operation Detailed Operating Instructions ALC CONTROL cont d Comments Related Sections Output level flatness is dependent on the ALC circuitry and the maximum available power In order to have a leveled output it is necessary for the ALC circuitry to continuously control the output level This can only occur if the selected output power is below the maximum power level available at each frequency For leveled output power in the 10 dB range it is necessary that the LVL UNCAL annunciator remain off External ALC leveling also requires that the CW Generator can produce enough power to overcome losses in the intervening circuitry The LVL UNCAL annunciator must remain offto achieve leveling The 0 dB range should be used when using external leveling If any of the lower ranges are used the CW Generator must produce a
116. the controller begins the Remote message but it does not actually switch to remote until addressed to listen the first time When actually in remote the CW Generator s front panel REMOTE annuncia tor lights 3 30 Receiving the Local Message The Local message is the means by which the controller sends the Go To Local GTL bus com mand The CW Generator returns to front panel control when it receives the Local message When the CW Generator goes to local mode the front panel REMOTE annunciator turns off However even in local the CW Generator sends the status byte when addressed to talk 3 31 Receiving the Local Lockout Message The CW Generator does not respond to the Local Lockout message 3 32 Receiving the Clear Lockout Set Local Message The Clear Lockout Set Local message is the means by which the controller sets the Remote Enable REN bus control line false The CW Generator returns to local mode full front panel control when it receives the Clear Lockout Set Local message When the CW Generator goes to local mode the front panel REMOTE annuncia tor turns off 3 33 Receiving the Pass Control Message The CW Generator does not respond to the Pass 3 20 HP 8671B Control message because it does not have this controller capability 3 34 Sending the Require Service Message The CW Generator sends a Require Service mes sage if one or more of the following conditions exists for more than 50 ms 1
117. the meter to agree with the leveled power If the detector is operating in the square law POWER 8671B SYNTHESIZED METER GENERATOR EXT ALC CRYSTAL INPUT DETECTO RF OUTPUT UPLER Figure 3 3 External Leveling with a Crystal Detector 3 4 HP 8671B Operation Detailed Operating Instructions ALC CONTROL cont d Local Procedure contd Remote Procedure region the VERNIER will now control the level over a continuous 13 dB range and the CW Generators meter reading will track with the power meter reading as the VERNIER control is varied through the 10 to 3 dBm range To use external power meter leveling Set the ALC selector to INT and adjust the VERNIER to read 0 dBm on the meter This allows calibration of the CW Generator s meter to the leveled point Connect power meter to the point where leveling is to be used as shown in Figure 3 4 A directional coupler can be used to sample the power at the desired point Set the output level to the desired power and select the range hold function on the power meter This disables range changes and keeps the leveled power from oscillating Connect the recorder output of the power meter to the external ALC input connector The recorder output is a voltage that is proportional to the measured power in watts This voltage varies from 0 to 2 volts for each power meter range Leveling as low as 60 dBm can be accomplished with a sensitive power s
118. ut at each frequency in Table 4 1 The power meter readings should be within the limits specified 11 Repeat steps 9 and 10 for an output level of 3 dBm 10 dB range 7 dBm VERNIER 12 Set the CW Generator frequency to 2 0 GHz and output level to 0 dBm 0 dB range 0 dBm VERNIER 13 Tune the CW Generator in 2 GHz steps from 2 to 18 GHz Set the power meter s calibration factor appropriately and record the power output at each frequency in Table 4 1 The power meter readings should be within the limits specified 14 Repeat steps 12 and 13 for output levels of 5 dBm and 10 dBm 0 dB range 15 Set the CW Generator frequency to 2 0 GHz and output level to 10 dBm 10 dB range 0 dBm VERNIER 16 Tune the CW Generator in 2 GHz steps from 2 to 18 GHz Set the power meter s calibration factor appropriately and record the power output at each frequency in Table 4 1 The power meter readings should be within the limits specified 17 Repeat steps 15 and 16 for an output level of 20 dBm 20 dB range 0 dBm vernier 4 13 Performance Tests HP 8671B PERFORMANCE TESTS OUTPUT LEVEL HIGH LEVEL ACCURACY AND FLATNESS TEST contd Table 4 1 Qutput Level High Level Accuracy and Flatness Test Record 1 of 2 High Level Accuracy 8 dBm 10 dB range 3 dBm 10 dB range 0 dBm 0 dB range 5 dBm 0 dB range 10 dBm 0 dB range 4 14 6 25 dBm 6 25 dBm 6 25 dBm 6 00 dBm
119. utput at 20 dBm A reference level corresponding to the 20 dBm output is set on the spectrum analyzer and each 10 dB decrease in range is checked for a 10 dB decrease on the spectrum analyzer display Equipment Power Meter sy aves ay ca ata ceate edema ss HP 436A Power Sensor ner ar deee ed awe dae ne HP 8481A Local Oscillator dae tae es ene eee HP 8340A IIIS OES cater ah ae gt eee E EAE RHG DMS 1 18 Spectrum Analyzer ccc ccc eeeeees HP 8566B 40 dB Amplifier Sah Caine gees HP 8447F 20 dB Attenuator ccccee ere ceesens HP 8491B Option 020 20 dB Preamplifier HP 8447A Procedure 1 Calibrate and zero the power meter in the dBm mode 2 Connect the equipment as shown in Figure 4 6 NOTE Connect the mixer directly to the local oscilator to avoid any power loss 4 16 HD 8671B Performance Tests PERFORMANCE TESTS LOW LEVEL ACCURACY TEST cont d HP 8671B SYNTHES ZED P CW GENERATOR LOCAL OSCILLATOR Procedure Contra mo A mm 00 RF OUTPUT RF OUTPUT SPECTRUM ANALYZER POWER SENSOR 20 dB ATTENUATOR Se ane 20 dB PREAMPLIFIER STEP 15 Pee 40 dB INPUT OUTPUT X AMPLIFIER i OUTPUT Figure 4 6 Low Level Accuracy Test Setup 3 Setthe CW Generator frequency to 2 000 000 MHz RANGE to 20 dB and set the VERNIER for 0 dBm 4 Adjust the VERNIER for a power meter reading of 20 00 dBm 0 01 dB 5 Disconnect the power meter and connec
120. volved for example fire and electrical shock 2 Set the local oscillator to 2 100 001 MHz with an output level between 5 dBm and 8 dBm 3 Set the oscilloscope to external trigger positive slope trigger triggered sweep mode or NORMAL and 2 ms per division sweep time 4 6 HP 8671B Performance Tests PERFORMANCE TESTS FREQUENCY SWITCHING TIME TEST cont d Procedure cont d NOTE The following programs are for the HP 9826 or HP 9836 controller For use with the HP 85B controller increase the wait statements by a factor of 1000 This is done because the HP 85B executes wait commands in milliseconds while the HP 9836 and HP 9826 execute wait commands in seconds 4 Load and run the following HP IB controller program As the program is executing adjust the trigger controls for a stable 1 kHz sine wave display L U 20 3G Ay CLEAR 719 2 1 GHz 3 dBm Ext ALC OUTPUT 719 Ap1000002100075 GOTO 26 END 5 Press the pause key on the controller to stop the program Load and run the following program The program will continue switching the CW Generator between 18 GHz and 2 1 GHz until the pause key is pressed If necessary adjust the oscilloscope triggering to obtain a display similar to that shown in Figure 4 3 ig i Controller talk CW Generator listen SEND 73MTA LISTEN 19 0 dB range Ext ALC OUTPUT Path GG 072 Set to 18 GHz 3O GUTPUT Zip SG0doagz1 5 for HP 85B 5 ms 4g WALT OUS R
121. y to be within 3 dB range of final level Reference Oscillator Frequency 10 MHz Aging Rate lt 5 x 107 day After a 10 day warmup typically 24 hours in a normal operating environment SPECTRAL PURITY Single sideband Phase Noise 1 Hz bandwidth 2 06 2 GHz BH dBe 10 Hz offset from carrier lt 70 dBc 100 Hz offset from carrier lt 78 dBc 1 kHz offset from carrier lt 86 dBe 10 kHz offset from carrier lt 110 dBe 100 kHz offset from carrier 6 2 12 4 GHz lt 52 dBe 10 Hz offset from carrier lt 64 dBe 100 Hz offset from carrier lt 72 dBe 1 kHz offset from carrier HU dBe 10 kHz offset from carrier lt 104 dBe 100 kHz offset from carrier 12 4 18 0 GHz lt 48 dBe 10 Hz offset from carrier lt 60 dBe 100 Hz offset from carrier lt 68 dBe 1 kHz offset from carrier lt 76 dBc 10 kHz offset from carrier lt 100 dBe 100 kHz offset from carrier Harmonics lt 25 dBc At 8 dBm HP 8671B Table 1 1 Specifications 2 of 3 General Information Electrical Characteristics Performance Limits Conditions SPECTRAL PURITY cont d Subharmonics and multiples thereof Spurious Signals non harmon ically related except power line and fan rotation related Power line related and fan rotation related within 5 Hz below line frequencies and multiples thereof 2 0 6 2 GHz 6 2 12 4 GHz 12 4 18 0 GHz AF QUTPUT Output Power Remote Programming Absolute Level Accuracy 2 0

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