Series 8650A Universal Power Meters - Giga-tronics

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Series 8650A Universal Power MetersInputs/OutputsV PROP F Input (BNC):Analog Output (BNC):Trigger Input (BNC):GPIB connector:RS-232 connector:Recalls cal factors using source V PROP F output. Corrects powerreadings for sensor frequency response using sweeper voltageoutput. Input resistance = 50K. Does not operate in the fastmeasurement collection modes (normal mode only).Provides an output voltage of 0 to 10V from the respectivechannel in either Log or Lin units. Does not operate in the swiftand fast measurement buffered modes.Accepts a TTL trigger input signal for swift and fast measurementbuffered modes, and time gating mode.Interfaces the power meter to a host computer for remoteprogramming using SCPI, IEEE 488.2 and IEC-625 coding, alsoemulation modes.Interfaces the power meter to serial communications equipment,using RS-232 format.General SpecificationsTemperature Range:Operating:Storage:Power Requirements:Physical Characteristics:Dimensions:Weight:0 to 55 °C (32 to 13 2 °F)-40° to 70 °C (-40° to 158 °F)100/120/220/240Vac
2Adjustments & Performance Tests2.1 IntroductionThis chapter defines procedures for adjustments and performance testing for the Series 8650A UniversalPower Meters.2.2 Calibration ProcedureIf any of the instrument performance characteristics cannot be calibrated within specification, refer tothe Troubleshooting Chapter of the 8650A Service Manual.2.2.1 Equipment RequirementsTable 2-1 lists the equipment required for calibration of the 8650A power meters.Table 2-1: Related Equipment ListDescription Representative Model Key CharacteristicsCW Thermistor Power Meter HP 432A VRF and Vcomp available externallyThermistor Mount HP 478-H75< 1.07 VSWR @ 50 MHz(30 dB return loss)Accuracy + 0.5% @ 50 MHzDigital Voltmeter HP 34401A +0.05% accuracy & 1 µV resolutionPCWin 95, 98, 2000, NTPC comm port software HyperTerminal TM Serial Port Communications software9 pin Type D Serial Cable Radio Shack P/N 26-117 Serial cable (non-null modem)2.2.2 Calibrator Output PowerPower up the 8650A and allow for a 30 minute warm up period. Perform the Calibrator Performanceand Output Power Reference Level tests (see section 2.3). The unit should meet all requiredperformance specifications. If the unit fails to meet the 1 mW Reference Output Specification withinthe 0.981 mW to 1.019 mW minimum and maximum limits, continue to section 2.2.3.2.2.3 1 mW Reference Output AdjustmentConnect the test equipment per Figure 2-1. Set the 50 MHz calibrator to 0 dBm from the front panel ofthe 8650A and turn on the calibrator. Using the HyperTerminal TM program, connect to the 8650A andenter the command “XC TESTCAL”. Record the 50 MHz Cal Factor from the response into the CalFactor column of the Calibrator Cal Factor table. Type “T” and press “Enter”. Enter “0” at the prompt toreset the calibrator cal factor to zero. Measure the calibrator output using the following procedure:Manual 32089, Rev. A, December 2000 2-1
Page 2 and 3: All technical data and specificatio
Page 4 and 5: Preparation for ReshipmentFollow th
Page 6 and 7: Series 8650A Universal Power Meters
Page 33 and 34: Adjustments & Performance Tests2.3.
Page 35 and 36: Adjustments & Performance Tests2.4
Page 37 and 38: Adjustments & Performance Tests2.5.
Page 39 and 40: 3Theory of Operation13.1 8650A Powe
Page 41 and 42: Theory of Operation3.1.4 Calibrator
Page 43 and 44: 4Replaceable Parts4.1 8650A Replace
Page 45 and 46: 5Troubleshooting5.1 8650A Fault Iso
Page 47 and 48: TroubleshootingSensor will notcalib
Page 49 and 50: TroubleshootingCrest factor errorsN
Page 51 and 52: TroubleshootingNotes:1. The instrum
Page 53 and 54: Troubleshooting5.2.3 Calibrator1. U
Page 55: IndexSeries 8650A Universal Power M

Series 8650A Universal Power Meters - Giga-tronics

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