R&S FSQ Signal Analyzer - Rohde & Schwarz

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R&S FSQ Remote Control – Programming Examples More Complex Programming Examples 'Activate search limit and set to ±400 kHz about center frequency status = viWrite(analyzer, "CALC:THR:STAT ON", 16, retCnt) status = viWrite(analyzer, "CALC:THR -60DBM", 15, retCnt) 'Activate threshold and set to –60 dBm '--------- Activate search for spurious --------------------status = viWrite(analyzer, "CALC:MARK:FUNC:FPE:SORT X", 25, retCnt) 'Sort according to frequency status = viWrite(analyzer, "INIT;*WAI", 9, retCnt) 'Perform sweep with sync status = viWrite(analyzer, "CALC:MARK:FUNC:FPE 10", 21, retCnt) 'Search for 10 highest peaks status = viWrite(analyzer, "CALC:MARK:FUNC:FPE:COUN?", 24, retCnt) 'Call number of peaks, check it, status = viRead(analyzer, countstr$, 30, retCnt) 'and read it in status = viWrite(analyzer, "CALC:MARK:FUNC:FPE:X?", 21, retCnt) 'Query and read status = viRead(analyzer, freqlist$, 1000, retCnt) 'frequency list status = viWrite(analyzer, "CALC:MARK:FUNC:FPE:Y?", 21, retCnt) 'Query and read status = viRead(analyzer, powerlist$, 1000, retCnt) 'level list Print "# of spurious: ";countstr$ 'Output number of results Print "Frequencies: ";freqlist$ 'Output frequency list Print "Power: ";powerlist$ 'Output level list END SUB REM ************************************************************************ 7.8 Operating Manual 1313.9681.12 - 01
R&S FSQ Remote Control – Programming Examples 7.3.1.2 Shape Factor Measurement (Using n dB Down) More Complex Programming Examples The n-dB-down function of the R&S FSQ is used twice to determine the shape factor of a filter (ratio of bandwidths at 60 dB and 3 dB below the filter maximum). The following example is again based on a signal with a level of –30 dBm at 100 MHz. The shape factor is determined for the 30 kHz resolution bandwidth. The default setting of the R&S FSQ is used for measurements (SetupInstrument). REM ************************************************************************ Public Sub ShapeFactor() result$ = Space$(100) '--------- R&S FSQ default setting -------------------------- CALL SetupInstrument 'Default setting status = viWrite(analyzer, "INIT:CONT OFF", 13, retCnt) 'Single sweep '--------- Set frequency -----------------------------------status = viWrite(analyzer, "FREQ:SPAN 1MHz", 14, retCnt) 'Span status = viWrite(analyzer, "BAND:RES 30kHz", 14, retCnt) 'Resolution bandwidth status = viWrite(analyzer, "INIT;*WAI", 9, retCnt) 'Perform sweep with sync '--------- Measure 60 dB value -----------------------------status = viWrite(analyzer, "CALC:MARK:PEXC 6DB", 18, retCnt) 'Peak excursion status = viWrite(analyzer, "CALC:MARK:STAT ON", 17, retCnt) 'Marker1 on status = viWrite(analyzer, "CALC:MARK:TRAC 1", 16, retCnt) 'Assign marker1 to trace1 status = viWrite(analyzer, "CALC:MARK:MAX", 13, retCnt) 'Set marker1 to 100 MHz status = viWrite(analyzer, "CALC:MARK:FUNC:NDBD 60dB", 24, retCnt) 'Read out bandwidth measured status = viWrite(analyzer, "CALC:MARK:FUNC:NDBD:RES?", 24, retCnt) 'at 60 dB status = viRead(analyzer, result$, 100, retCnt) result60 = Val(result$) '--------- Measure 3 dB Down value -------------------------status = viWrite(analyzer, "CALC:MARK:FUNC:NDBD 3dB", 23, retCnt) 'Read out bandwidth measured status = viWrite(analyzer, "CALC:MARK:FUNC:NDBD:RES?", 24, retCnt) 'at 60 dB status = viRead(analyzer, result$, 100, retCnt) result3 = Val(result$) '--------- Read out shape factor----------------------------- Print "Shapefaktor 60dB/3dB: ";result60/result3 END SUB REM ************************************************************************ Operating Manual 1313.9681.12 - 01 7.9
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R&S ® FSQ Signal Analyzer Operatin
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Basic Safety Instructions Always re
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Electrical safety Basic Safety Inst
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