Rohde & Schwarz RTM2032 - Limit Freq; No. of Averages; Nx Single; Waveform Rate

Acquisition and Waveform Setup
R&S
®
RTM20xx
25User Manual 1317.4726.02 ─ 01
"Average"
The average is calculated from the data of the current acquisition and
a number of acquisitions before. The method reduces random noise
and other heterodyne signals. It requires a stable, triggered and repet-
itive signal.
The number of acquisitions for average calculation is defined with No.
of Averages.
"Smooth"
Smoothing calculates a mean value of several adjacent sample points
and displays it. The result is a smoothed waveform. Thus, smoothing
is a moving average that uses the full data and can be used for non-
periodic signals. It works like a low-pass, and increases the vertical
resolution at the expense of bandwidth reduction.
"Filter"
Filter is a low-pass with 3 db attenuation at a configurable limit fre-
quency set with "Limit Freq.". The filter removes higher frequencies
from the channel signals.
Remote command:
CHANnel<m>:ARIThmetics on page 287
Nx Single
Sets the number of waveforms acquired with RUN N× SINGLE.
Remote command:
ACQuire:NSINgle:COUNt on page 282
No. of Averages
Defines the number of waveforms used to calculate the average waveform with "Wfm.
Arithmetics" = "Average". Only numbers from the 2
n
progression are available. The higher
the number, the better the noise is reduced.
Remote command:
ACQuire:AVERage:COUNt on page 285
Limit Freq.
Sets the limit frequency for "Wfm. Arithmetics" = "Filter". The low pass filter has 3 dB
attenuation at the given limit frequency.
Remote command:
ACQuire:FILTer:FREQuency on page 287
Waveform Rate
Defines the mode to set the sample rate (samples per second saved in the memory) and
the waveform acquisition rate (waveforms per second).
"Max. Wfm.
Rate"
The instrument combines sample rate and memory depth to acquire at
maximum waveform acquisition rate. In connection with persistence,
the mode can display rare signal anomalies.
Note: Due to less memory depth, aliasing effects may occur.
"Max. Sa.
Rate"
The instrument acquires the signal at maximum sample rate and uses
the full memory depth. The result is a waveform with maximum number
of waveform samples, high degree of accuracy, and low risk of aliasing.
However, the waveform acquisition rate is low.
Reference for Waveform Setup