Manual

Functional description
32 Two-channel digital Oscilloscopes
Functional description
III - TRIGGER system (cont'd)
3. VIDEO triggering
Video trigger
page 1
To trigger on the fields or the lines of standard video signals.
Option
Values
Instructions
Type
Video
To choose the type of video, choose AC
coupling; you can then trigger on NTSC,
PAL, and SECAM video signals.
Source
CH1
CH2
Choose the triggering signal input source.
EXT
EXT/5
Ext and Ext/5 use the EXT TRIG input signal as
source.
Polarity
(normal)
Normal triggers on the negative edge of the sync
pulse.
(inverted)
Inverted triggers on the positive edge of the sync
pulse.
Sync
All lines
Line num
Odd Fr
Even Fr
Choose the appropriate video triggering:
All lines – Line number – Odd frame – Even
frame
Video trigger
page 2
Option
Values
Instructions
Type
Video
When you choose the type of video, choose
AC coupling; you can then trigger on NTSC,
PAL, and SECAM video signals.
Standard
NTSC
Pal/Secam
Choose the video standard for the synchronization
and the number of lines.
Mode
Auto
Use this mode to let the acquisition run in the
absence of a valid trigger. This mode functions
with the time base of 100ms/div and less.
Normal
Use this mode when you want to see only valid
triggered signals. When you use this mode, the
oscilloscope displays the trace only in the
presence of a triggering event.
Single
For a single acquisition, press the "SINGLE" key.
Set-Up
Access to the "Trigger Configuration Menu".