Promax OD-405, Manual, Page: 177 / 218

USER’S MANUAL. OD-405/410B/411/415
Page 61 11-2011
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5.6.4.2 Selecting the horizontal scale
To select the time base scale turn the TIME/DIV knob; left (slow) or right
(fast).
Range: 1ns/Div ~ 50s/Div,1-2.5 -5 -10 increments.
The timebase indicator at the bottom of the display updates the current
horizontal scale
5.6.4.3 Selecting the Waveform update mode
The display update mode is switched automatically or manually
according to the horizontal scale.
Main Mode
Updates the whole displayed waveform at once. The main mode is
automatically selected when the horizontal scale (timebase) is fast.
Horizontal scale
≤
100 ms/div.
Trigger: All mode available.
Roll mode
Updates and moves the waveform gradually from the right side of the
display to the left. The Roll mode is automatically selected when the
horizontal scale (timebase) >= a 50ms or slower.
When in the Roll mode, an indicator appears at the bottom of the
display.
For the OD-405/OD-410B , when the scope is in roll mode the record
length is 2M (1 channel) or 1M (2 channel).
Timebase
≥
50ms/div (
≤
1.25MS/s) ( OD-411/OD-415 )
≥
50ms/div (
≤
100Sa/s) ( OD-405/OD-410B )
Trigger Auto mode only.