Series 8650A Universal Power Meters - Giga-tronics

Series 8650A Universal Power MetersExcessivemeasurement error?YesIs sensor VSWR inspecification?NoRepair/replace thesensorNote 8YesIs the calibrator outputaccurate?NoRecalibrate/repair thecalibratorNote 11NoYesRepair/replace thesignal processor boardExcessive zero errorsYesPerform zero drift test.Pass?Note 12YesDoneNoIs there a DCcomponent on the RF?Note 13YesUse a DC blockNoNoCheck detector inputflex cable. OK now?YesDoneNoCheck for excessivepower supply rippleIncorrect low levelreadingsYesReview low levelapplication noteCheck for noisesources (fans, motors)Does another sensorwork properly?YesRepair/replace thesensorNote 8NoNoIs power supply rippleexcessive?YesRepair/replace thepower supplyNoContinue on the nextpageRepair/replace the hostor signal processorFigure 5-4: Fault Isolation Tree (Measurement Problems)5-4 Manual 32089, Rev. A, December 2000