Acquisition and waveform setup
R&S
®
RTP
151User Manual 1337.9952.02 ─ 12
Mode
Selects the decimation mode. Decimation reduces the data stream of the ADC to a
stream of waveform points with lower sample rate and a less precise time resolution.
The R&S RTP uses decimation, if the waveform "Sample rate" is less than the ADC
sample rate. In this case, interpolation is not possible.
The decimation mode is waveform-specific, you can select another mode for each
waveform.
There are different methods to define the recorded waveform point out of n sample
points:
"Sample"
One of n samples in a sample interval of the ADC is recorded as
waveform point, the other samples are discarded. The time between
the two adjacent waveform points is exactly the resolution. Very short
glitches might remain undiscovered by this method.
"Peak detect"
The minimum and the maximum of n samples in a sample interval are
recorded as waveform points, the other samples are discarded.
"High res"
The average of n sample points is recorded as one waveform sam-
ple. Averaging reduces the noise, the result is a more precise wave-
form with higher vertical resolution.
"RMS"
The waveform point is the root mean square of n sample values.
Thus, the RMS value reflects the instantaneous power. This arith-
metic mode is used to average a measured power waveform. Linear
averaging of power signals causes an error dependent on the noise
of the signal to be averaged.
Remote command:
CHANnel<m>[:WAVeform<n>]:TYPE on page 1195
Acquire settings
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