R&S
®
CMW 500 GPRF Applications
GPRF GUI Reference
Operating Manual 1202.3986.32 – 03 154
Measurement Length, Step Length and Trigger Offset
Avoid switching transients
Select your measurement length smaller than the actual width of the power steps to
avoid the transients caused by the power steps of your input signal. A shortened first
step or a trigger offset can shift the "Measurement Length" relative to the power steps;
see Single Power Steps and Sequence Mode.
GPIB command: CONFigure:GPRF:MEASurement<i>:POWer:MLENgth
Control – Repetition
Defines how often the measurement is repeated if it is not stopped explicitly; see
Statistical Settings.
A "Continuous" measurement is continued until it is explicitly terminated; the
results are periodically updated.
A "Single Shot" measurement is stopped after one statistics cycle, i.e. after the
number of measurement intervals defined by the "Statistic Count".
Single shot is preferable if only a single measurement result is required under fixed
conditions, which is typical for remote-controlled measurements. Continuous mode is
suitable for monitoring the evolution of the measurement results in time and observe
how they depend on the measurement configuration, which is typically done in manual
control. The repetition modes for remote and manual control and the reset/preset
values are therefore independent from each other.
GPIB command: CONFigure:GPRF:MEASurement<i>:POWer:REPetition
Filter
Sets the type and bandwidth of the measurement filter (IF filter). The R&S CMW 500
provides filters of Gaussian shape with 3-dB bandwidths between 1 kHz and 10 MHz
and bandpass filters with 3-dB bandwidths between 1 kHz and 40 MHz.
The bandpass filters are designed as root-raised cosine (RRC) filters with a roll-off of
0.1. This ensures steep filter edges with a wide, flat passsband (90 % of the filter
bandwidth). Compared to Gaussian filters, the bandpass filters require longer settling
times and therefore increase the measurement duration.
In addition to the Gaussian and bandpass filters with selectable bandwidth, the R&S
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