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Acquisition and waveform setup
R&S
®
MXO 4 Series
100User Manual 1335.5337.02 ─ 05
Left = incomplete roll waveform
Middle = roll completed with "Off screen capture" = Off
Right = roll completed with "Off screen capture" = On
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
●
Event actions are not possible
The instrument activates the roll mode automatically if the following conditions are ful-
filled:
●
"Timebase range" exceeds the defined "Start roll time"
●
The "Acquisition mode" is set to "Sample" or "Peak detect"
●
"N-single/Avg count" = 1
●
Fast segmentation is disabled
●
Event actions are disabled
●
All serial buses are disabled
Measurement statistics evaluate the currently displayed waveform. Therefore, "Mea-
sure all events" is enabled automatically in roll mode.
Remote command:
TIMebase:ROLL:ENABle on page 428
TIMebase:ROLL:STATe? on page 429
Start roll time
Sets the minimum acquisition time for automatic start of the roll mode.
The instrument activates the roll mode automatically if the "Timebase range" exceeds
the value of the "Start roll time".
Remote command:
TIMebase:ROLL:MTIMe on page 428
Off screen capture
If enabled, the analyzable waveform in roll mode is extended. Samples that arrive the
left edge of the display are kept, they are moved to the unvisible area on the left.
After stopping the acquisition, you can analyze the complete roll waveform, including
the invisible part:
●
Increase the "Time scale" to see a longer part of the waveform.
●
Scroll the waveform: tap and drag the waveforn to the right.
Horizontal setup
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