Rohde & Schwarz R&S FSP Series, Operating Manual

Page: 758 / 796

R&S FSP Remote Control – Programming Examples
More Complex Programming Examples
7.24 Operating Manual 1164.4556.12 - 06
7.3.8 Level Correction of Transducers (Definition of Transducer Fac-
tors)
In more complex test systems, the frequency response of the test setup must be
taken into account in all power measurements to avoid any measurement errors
being introduced from sources other than the DUT.
The R&S FSP offers the possibility of defining a frequency-dependent attenuation
correction factor (transducer factor).
In the example below, a factor with the following characteristics is defined:
Name: Transtest
Unit: dB
Scaling: lin
Comment: simulated cable correction
The factor is defined and can be activated as required.
REM ************************************************************************
Public Sub TransducerFactor()
'--------- Define transducer factor -------------------------
status = viWrite(analyzer, "CORR:TRAN:SEL 'TRANSTEST'", 25, retCnt)
'Define "Transtest" transducer factor
status = viWrite(analyzer, "CORR:TRAN:UNIT 'DB'", 19, retCnt)
'Unit 'dB'
status = viWrite(analyzer, "CORR:TRAN:SCAL LIN", 18, retCnt)
'Linear frequency axis
status = viWrite(analyzer, "CORR:TRAN:COMM 'Simulated cable correction'", 43,
retCnt)
cmd$ = "CORR:TRAN:DATA "
'Enter frequency and level
cmd$ = cmd$ + "10MHz, 0,"
'values. Level values without unit!
cmd$ = cmd$ + "100MHz, 3,"
cmd$ = cmd$ + "1GHz, 7,"
cmd$ = cmd$ + "3GHz, 10"
status = viWrite(analyzer, cmd$, 50, retCnt)
'Enter frequency and level values
'--------- Activate transducer ------------------------------
status = viWrite(analyzer, "CORR:TRAN:STAT ON", 17, retCnt)
'Activate transducer factor
END SUB
REM ************************************************************************
Frequency Level
10 MHz 0 dB
100 MHz 3 dB
1 GHz 7 dB
3 GHz 10 dB