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Options
Settings
Comments
Coupling
AC
DC
Noice Reject
HF Reject
LF Reject
Select the components of the trigger signal applied to the trigger circuitry.
AC: Blocks DC components and attenuates signals below 10Hz.
DC: Passes all components of the signal.
HF Reject: Attenuates the high-frequency components above 80kHz.
LF Reject: Blocks DC components and attenuates the low-frequency components below 8kHz.
NOTE:
Trigger coupling only affects the signal passed through the trigger system. It does not affect the bandwidth or
coupling of the signal displayed on the screen.
4.
Video Trigger
Options
Settings
Comments
Video
With Video highlighted, an NTSC, PAL or SECAM standard video signal will be triggered. The
trigger coupling is preset to AC.
Source
CH1
CH2
CH3
CH4
EXT
EXT/5
Select the input source as the trigger signal. Ext and Ext/5 use the signal applied to the EXT TRIG
connector as the source.
Polarity
Normal
Inverted
Normal: Triggers on the negative edge of the sync pulse.
Inverted: Triggers on the positive edge of the sync pulse.
Sync
All Lines
Line Number
Odd Field
Even Field
All Fields
Choose a proper video sync. When selecting Line Number for the Sync option, you may use the
User Select knob to specify a line number.
Standard
NTSC
PAL/SECAM
Choose a video standard for sync and line number count.
Note:
When you choose Normal Polarity, the trigger always occurs on negative-going sync pulses. If the video signal
contains positive-going sync pulses, use the Inverted Polarity option.
5.
Pulse Width Trigger
You can use it to trigger on aberrant pulses.