R&S ESR Series

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R&S
®
ESR
132User Manual 1175.7068.02 ─ 12
REM *************************************************************************
Public Sub RefFixed()
Dim retCount as Long
CALL SetupInstrument 'Default setting
'--------- Measuring the reference point ----------------------------------
CALL InstrWrite(analyzer,"INIT:CONT OFF")
'Switch to single sweep
CALL InstrWrite(analyzer,"CALC:MARK:PEXC 6DB")
'Define peak excursion
CALL InstrWrite(analyzer,"CALC:MARK:STAT ON")
'Activate marker 1
CALL InstrWrite(analyzer,"CALC:MARK:TRAC 1")
'Set marker 1 to trace 1
CALL InstrWrite(analyzer,"INIT;*WAI") 'Perform sweep with sync
CALL InstrWrite(analyzer,"CALC:MARK:MAX")
'Set marker 1 to 100 MHz
CALL InstrWrite(analyzer,"CALC:DELT:FUNC:FIX ON")
'Define reference point
'----- Setting frequency, level and bandwidth for measuring harmonics ------
CALL InstrWrite(analyzer,"FREQ:CENT 400MHz;Span 1MHz")
'Set freq of 3rd harmonic
CALL InstrWrite(analyzer,"BAND:RES 1kHz")
'Set suitable RBW
CALL InstrWrite(analyzer,"SWEEP:TIME:AUTO ON")
'Couple sweep time
CALL InstrWrite(analyzer,"INP:ATT:AUTO ON")
'Select more sensitive level setting
CALL InstrWrite(analyzer,"DISP:WIND:TRAC:Y:RLEV -50dBm")
CALL InstrWrite(analyzer,"INIT;*WAI") 'Perform sweep with sync
CALL InstrWrite(analyzer,"CALC:DELT:MAX;X:REL?;Y?")
'Read delta marker
result$ = Space$(100)
CALL InstrRead(analyzer, result$, 100, retCount)
'Read frequency and level
Debug.Print "Deltamarker 1: "; result$
END SUB
REM ***********************************************************************
Measuring Noise and Phase Noise
When phase noise is measured, the noise power related to a bandwidth of 1 Hz is set
in relation to the power of an adjacent carrier signal. A commonly used offset between
the measured frequency and the carrier frequency is 10 kHz.
When noise is measured, the measured absolute level is related to a bandwidth of 1
Hz.
The following example is also based on a signal at 100 MHz with a level of -30 dBm.
Two markers are used to determine both the noise and the phase noise at a 10 kHz
offset from the carrier signal.
Brief Introduction to Remote Control