108
4 ms 500 200 ms/div Yes Yes
4 ms 2500 1 s/div Yes Yes
4 ms 5000 2 s/div Yes Yes
4 ms 50000 20 s/div Yes Yes
4 ms 100000 40 s/div Yes Yes
3 or 4
Channels
On
4 ms
500
200 ms/div
Yes
No
4 ms 2500 1 s/div Yes No
4 ms 5000 2 s/div Yes No
4 ms 50000 20 s/div Yes No
4 ms 100000 40 s/div Yes No
8 ms 500 400 ms/div Yes Yes
8 ms 5000 4 s/div Yes Yes
8 ms 25000 20 s/div Yes Yes
8 ms 50000 40 s/div Yes Yes
The maximum record length where Roll mode is allowed is 8 M.
Interactions of Roll Mode and Other Instrument
Settings
Roll mode can interact with other instrument settings:
 If Roll mode is on and you turn on Fast Acquisitions, Roll mode will be suppressed until you
turn Fast Acquisitions off.
 If Roll mode is on, math waveforms and measurements are updated only after acquisition is
stopped (when you manually stop an acquisition). If you stop an acquisition before a record is
filled, the math waveform or measurements will be calculated on the partial data.
 Roll mode is only valid for real-time acquisition modes such as Sample, Peak Detect, and Hi
Res. Roll mode is ignored in Average or Envelope acquisition modes.
 Roll mode is suppressed when FastFrame is on.
 Deskew values are ignored when Roll mode is on.
 If you attempt to save a waveform when Roll mode is on, only the waveform points in the
acquisition memory are saved.