R&S FSMR, Руководство по эксплуатации

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R&S FSMR Measurement Receiver Mode
1166.3363.12 4.4-12 E-2
MEAS TIME/
AVERAGE
The MEAS TIME/ AVERAGE softkey opens a list in which the measurement
time can be set. Results become more stable with extended measurement time,
particularly if signals with low power are measured.
MEAS TIME
SHORT (AUTO AVG, NOISE 0.05 dB, MAX TIME 1 s)
NORMAL (AUTO AVG, NOISE 0.01 dB, MAX TIME 3 s)
LONG (AUTO AVG, NOISE 0.001 dB, MAX TIME 10 s)
MANUAL (MAN AVG, MEAS TIME 100 ms)
Stationary signals with high power (>-0 dBm) require only a short measurement
time to yield stable and exact results. In this case, the
SHORT setting is
recommended because it provides the highest measurement repetition rates.
The
NORMAL setting increases the stability of the displayed results for the
measurement of signals with low power or of modulated signals.
The
LONG setting is recommended for signals at the lower end of the
measurement range (<-20 dBm). This setting can be used to minimize the
influence of noise.
IEC/IEEE bus command:
SENS:PMET:MTIM LONG | NORM | SHOR
NUMBER OF
READINGS
The NUMBER OF READINGS softkey activates the averaging of the power
reading. It opens a window for the entry of the number of readings (averagings)
to be performed after a single sweep has been started.
The softkey is only available if the MEAS TIME / AVERAGE mode is set to
manual average.
The range for the average count is 0 to 256 in binary steps (1 / 2 / 4 / 8 …). For
average count = 0 or 1, one reading is performed.
The averaging and sweep count of the trace menu are not connected.
Results become more stable with extended average, particularly if signals with
low power are measured. This setting can be used to minimize the influence of
noise in the power meter measurement.
IEC/IEEE bus command:
SENS:PMET:MTIM:AVER:STAT ON
SENS:PMET:MTIM:AVER:COUNT
<numeric_value>
DISPLAY
LOG LIN
The DISPLAY LOG/LIN softkey switches the result display between logarithmic
display (units: dBm and dB) and linear display (units: W and %).
IEC/IEEE bus command:
UNIT:PMET:POW DBM
Fig. 4.4-8 Powersensor with relative display