[Sense<Sensor>:][Power:][Avg:]Aperture - R&S NRP Series User Manual

®
R&S NRPxxA(N)
If you deactivate the smoothing filter, 300 to 3000 periods are required to obtain the
same effect. The sampling values are considered equivalent and are averaged in a
sampling window, which yields an integrating behavior of the measuring instrument. To
obtain optimum suppression of variations in the result, exactly adapt the modulation
period to the size of the sampling window. Otherwise, the modulation can have a con-
siderable influence, even if the sampling window is much larger than the modulation
period.
Calculating the measurement time
Normally, the measurement time is calculated as follows:
MT = 2 * AC * APER + (2 * AC - 1) * 100
with:
MT: overall measurement time
AC: average count
APER: aperture time
100 μs is the time for switching the chopper phase.
Accelerating measurements
Using
surement as follows:
●
Chopper is disabled.
●
Average count is set to 1, no matter which average count you have set.
Thus, the overall measurement time is only defined by the aperture time, and the mea-
surement time for a fast measurement is calculated as follows:
MT = APER
The fast measurement setting delivers up to 100 000 measurements per second with-
out any blind time over randomly long time periods. Programming examples are given
in Chapter 10.2, "Performing the fastest measurement in continuous average
on page 124.
Remote commands:
[SENSe<Sensor>:][POWer:][AVG:]APERture
[SENSe<Sensor>:][POWer:][AVG:]BUFFer:CLEar
[SENSe<Sensor>:][POWer:][AVG:]BUFFer:COUNt?
[SENSe<Sensor>:][POWer:][AVG:]BUFFer:DATA?
[SENSe<Sensor>:][POWer:][AVG:]BUFFer:SIZE
[SENSe<Sensor>:][POWer:][AVG:]BUFFer:STATe
[SENSe<Sensor>:][POWer:][AVG:]FAST
[SENSe<Sensor>:][POWer:][AVG:]SMOothing:STATe
[SENSe<Sensor>:][POWer:][AVG:]APERture <integration_time>
Sets the duration of the sampling window in continuous average mode. During this
time interval, the average signal power is measured.
User Manual 1177.6017.02 ─ 08
[SENSe<Sensor>:][POWer:][AVG:]FAST
Remote control commands
Configuring the measurement modes
μ s
ON, you can accelerate the mea-
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mode",
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