Rohde & Schwarz R&S FSL3 - Page 1644

Fast Power Measurement on Power Ramps R&S FSL
1300.2519.12 7.16 E-11
t
Trace start
Time offset of
first pulse
Measurement
Time
Measurement
Time
Measurement
Time
Period Period
P
Trigger
Threshold
Fig. 7–1 Block diagram illustrating signal processing in analyzer
In the example below, a GSM puls sequence of 8 pulses is measured with an offset of 50 µs of the first
pulse, 450 µs measurement time/pulse and 576.9 µs pulse period.
REM ************************************************************************
Public Sub MultiSumMarker()
result$ = Space$(200)
'––––––––– R&S FSL default setting–––––––––––––––––––––––––––––––––––––––
CALL SetupStatusReg 'Configure status register
CALL InstrWrite(analyzer,"*RST") 'Reset instrument
CALL InstrWrite(analyzer,"INIT:CONT OFF") 'Single sweep mode
CALL InstrWrite(analyzer,"SYST:DISP:UPD ON")
'ON: switch display on
'OFF: switch display off
'––––––––– Configure R&S FSL for power measurement in time domain –––––––––
CALL InstrWrite(analyzer,"FREQ:CENT 935.2MHz;SPAN 0Hz")
'Frequency setting
CALL InstrWrite(analyzer,"DISP:WIND:TRAC:Y:RLEV 10dBm")
'Set reference level to 10 dB
CALL InstrWrite(analyzer,"INP:ATT 30 dB") 'Set input attenuation to 30 dB
CALL InstrWrite(analyzer,"BAND:RES 1MHz;VID 3MHz")
'Bandwidth setting
CALL InstrWrite(analyzer,"DET RMS") 'Select RMS detector
CALL InstrWrite(analyzer,"TRIG:SOUR VID") 'Trigger source: video
CALL InstrWrite(analyzer,"TRIG:LEV:VID 50 PCT")
'Trigger threshold: 50%
CALL InstrWrite(analyzer,"SWE:TIME 50ms") 'Sweep time  1 frame