Acquisition and waveform setup
R&S
®
RTO6
130User Manual 1801.6687.02 ─ 05
"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 1333
Arithmetic
Waveform arithmetic builds the resulting waveform from several consecutive acquisi-
tions of the signal. The arithmetic works with interpolated and decimated waveforms.
This setting is waveform-specific.
The methods are:
"Of
f"
The data of only one acquisition is recorded according to the decima-
tion settings. In effect, no waveform arithmetic is processed.
"Envelope"
Detects the minimum and maximum values in a sample interval over
several acquisitions. Each acquisition is done in the "Peak detect"
decimation mode, and the most extreme values for all acquisitions
build the envelope. The resulting diagram shows two envelope wave-
forms: the minimums (floor) and maximums (roof).
The envelope is built until the restart criterion is reached, see "Arith-
metic Reset > Mode"
on page 131.
Note: If you change from "Envelope" to "Off", make sure to set also
the "Decimation" to the required value.
"Average"
The average is calculated from the data of the current acquisition and
several acquisitions before. The method reduces random noise and
other heterodyne signals. It requires a stable, triggered and periodic
signal for correct function.
The number of acquisitions for average calculation is defined with
"A
verage count"
The "Auto reset mode" defines the restart condition.
Remote command:
CHANnel<m>[:
WAVeform<n>]:
ARIThmetics on page 1334
Couple channels
Sets the acquisition mode and the waveform arithmetic of all channels to the last set
value.
If the acquisition settings are coupled, "Multi waveform" is not available, only one
waveform per channel can be used.
Remote command:
ACQuire:CDTA on page 1332
Acquire settings
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