R&S NRP Series, Руководство пользователя

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Remote control commands
R&S
®
NRPxxA(N)
82 User Manual 1177.6017.02 ─ 08
ASCii
List of comma separated, readable values.
[,0 to 12]
Defines the number of decimal places.
The reset value 0 does not restrict the number of decimal pla-
ces.
Example for
ASCii,4
format:
1.2938e-06, -4.7269e-11, ...
*RST: ASCii,0
9.7 Configuring the measurement modes
In the following, the settings needed for configuring a measurement mode are descri-
bed.
Further information:
●
Chapter 9.8, "Configuring basic measurement parameters" , on page 86
●
Chapter 9.5, "Controlling the measurement" , on page 67
Contents:
● Continuous average measurement .........................................................................82
9.7.1 Continuous average measurement
The continuous average mode measures the signal average power asynchronously
within definable time intervals (sampling windows). The aperture (width of the sampling
windows) can be defined.
Reducing noise and zero offset
The smoothing filter can reduce result fluctuations caused by modulation. But activat-
ing it increases the inherent noise of the sensor by approx. 20
%., so do not activate if
it unless required.
Configuring continuous average measurements of modulated signals
When measuring modulated signals in continuous average mode, the measurement
can show fluctuation due to the modulation. If that is the case, adapt the size of the
sampling window exactly to the modulation period to get an optimally stable display. If
the modulation period varies or is not precisely known, you can also activate the
smoothing function.
With smoothing activated, the selected sampling window has to be 5 to 9 times larger
than the modulation period so that the fluctuations caused by modulation are suffi-
ciently reduced. The sampling values are subjected to weighting (raised-von-Hann win-
dow), which corresponds to video filtering.
Configuring the measurement modes