Acquisition and waveform setup
R&S
®
RTE
180User Manual 1326.1032.02 ─ 20
●
Auto adjustment (Resolution dependency)
Remote command:
ACQuire:POINts:MAXimum on page 1111
Roll mode
Selects, if the roll mode is set automatically by the instrument or if it is turned off.
In roll mode, the instrument shows the waveforms immediately, without waiting for the
complete acquisition of the waveform record. If the time base is slow - at long time
scale values - the roll mode saves waiting for the waveform display. The instrument
displays newly acquired waveform points at the right edge of the display and moves
the waveform to the left.
The roll mode has following restrictions:
●
Roll mode disables persistence
●
History is not available
●
Event actions are not possible
The instrument activates the roll mode automatically if the following conditions are ful-
filled:
●
Acquisition time exceeds the defined "Minimum acquisition time"
●
Waveform arithmetic is disabled ("Off")
●
All channel waveforms are set to the same decimation mode, and only to one of
these values: "Sample", "Peak detect", or "High res"
●
All mask tests are disabled
●
Fast segmentation is disabled
●
Event actions are disabled
●
FFT is disabled
●
All serial buses are disabled
●
All digital channels are disabled (MSO option R&S RTE-B1)
The roll mode depends also on sample rate and record length. In roll mode, the sample
rate limit is 1 MSa/s. At 50 s, the resulting record length limit is 50 MSa.
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
≤
50
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
=
1
MSa/s
/
Number of active wfms.
The corresponding maximum record length is:
Record length
≤
1
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 1112
TIMebase:ROLL:STATe? on page 1113
Horizontal settings
To Next Page
Loading...
