Acquisition and waveform setup
R&S
®
RTP
144User Manual 1337.9952.02 ─ 12
If the acquisition time is >50 s, the record length limit is effective, and the maximum
sample rate depends on the acquisition time:
Sample rate
≤
100
MSa / Acquisition time.
If the acquisition time is <50 s, the maximum sample rate in roll mode depends on the
number of active channels:
Sample rate
=
2
MSa/s
/
Number of active wfms.
The corresponding maximum record length is:
Record length
≤
2
MSa/s
*
Acquisition time
/
Number of active wfms.
Thus, the roll mode switches off, or it does not activate automatically if:
●
The record length exceeds the limit at acquisition times >50 s.
●
The sample rate exceeds the limit.
●
Too many waveforms are active.
Remote command:
TIMebase:ROLL:ENABle on page 1193
TIMebase:ROLL:STATe? on page 1193
Start roll time
The instrument can activate the roll mode automatically if the Acquisition time exceeds
the value given here.
Remote command:
TIMebase:ROLL:MTIMe on page 1193
5.3 Horizontal accuracy
Access: "Menu" > "Horizontal" > "Setup" tab > "Skew".
The "Horizontal Accuracy" dialog box contains standard and optional settings to
improve measurement and analysis accuracy and to reduce jitter effects.
5.3.1 Skew
Access: "Menu" > "Horizontal" > "Setup" tab > "Skew" > "Skew" tab.
Skew compensates signal propagation differences between channels caused by the
different length of cables, probes, and other sources. Correct skew values are impor-
tant for accurate triggering and timing relations between channels.
Horizontal accuracy
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