Rohde & Schwarz R&S FSL3 - Page 1645

R&S FSL Fast Power Measurement on Power Ramps
1300.2519.12 7.17 E-11
'––––––––– Perform measurement and query results ––––––––––––––––––––––––––
CALL InstrWrite(analyzer,"INIT;*WAI") 'Perform sweep with sync
'Query results:
cmd$ = "CALC:MARK:FUNC:MSUM? "
cmd$ = cmd$ + "50US," 'Offset of first pulse
c
md$ = cmd$ + "450US," 'Measurement time
cmd$ = cmd$ + "576.9US," 'Pulse period
cmd$ = cmd$ + "8" 'Number of bursts
CALL InstrWrite(analyzer,cmd$)
CALL InstrRead(analyzer, result$) 'Read results
Print result$
END SUB
REM ************************************************************************
Multi–Burst Power Measurement
The multi–burst power measurement function is suitable for measuring the power of a sequence of
pulses with the following characteristics:
• The pulses occur at variable time intervals.
• The levels of all pulses of the sequence are reliably above the trigger threshold, or an external
trigger signal is used.
The function requires one trigger event per pulse. This means that if the video trigger or the IF power
trigger is used, the levels of all pulses must be above the trigger threshold.
The function is, therefore, particularly suitable for re–measuring DUTs already adjusted and whose
output power is within the specified range. The measurement is optimized for minimum overhead
relative to the actual measurement time.
t
Trigger
Signal
Trigger
Offset
Measurement
Time
Trigger
Signal
Trigger
Offset
Measurement
Time
Trigger
Signal
Trigger
Offset
Measurement
Time
Trigger
Threshold
Fig. 7–2 Block diagram illustrating signal processing in analyzer
Either the root–mean–square power or the peak power is measured, depending on whether the RMS
detector or the PEAK detector is selected. The function always uses TRACE 1.