Getting Started Manual
WA-GSM-E RevB
48
Video Triggering
Use Video Triggering to trigger on fields or lines of standard video signals.
1.
Press the
Type
option button and select
Video
.
2.
Press the
Source
option button to choose a channel input (CHS 1 - 2;
or CHS 1 - 4 on 4 channel models) or external input.
3.
Press the
Polarity
option button and select
(Normal) or
(
Inverted). Normal triggers on the negative edge of the sync pulse.
Inverted triggers on the positive edge of the sync pulse.
4.
Press the
Sync
option button and select a video sync (
Line Num
,
All
Lines
,
Odd Field
,
Even Field
). If you select
Line Num
, you can turn
the
Adjust
front panel knob to set the appointed line number.
5.
Press the
Next Page
option button.
6.
Press the
Standard
option button and select the video standard for
sync and line number count (NTSC or Pal/Secam).
7.
Press the
Mode
option button to select
Auto
,
Normal
, or
Single
mode. Use
Auto
mode to let the acquisition automatically run in the
absence of a trigger. Use
Normal
mode when you want to see only
valid triggered waveforms (when you use this mode the oscilloscope
does not display a waveform until after the first trigger). Use
Single
mode when you want the oscilloscope to acquire a single waveform.
