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Reference
104
TDS1000/2000-Series Digital Oscilloscope User Manual
Video Trigger
Options Settings Comments
Video With Video highlighted, triggering occurs
on an NTSC, PAL, or SECAM standard
video signal
Trigger coupling is preset to AC
Source CH1
CH2
CH3*
CH4*
Ext
Ext/5
Selects 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 and Inverted triggers on
the positive edge of the sync pulse
Sync All Lines
Line Number
Odd Field
Even Field
All Fields
Select appropriate video sync
Turn the USER SELECT knob to specify
a line niumber when you select Line
Number for the Sync option
Standard NTSC
PAL/SECAM
Select the video standard for sync and
line number count
* Available only on 4-channel oscilloscopes.
Key Points
Sync Pulses. When you choose Normal Polarity, the trigger always
occurs on negative-going sync pulses. If your video signal has
positive-going sync pulses, use the Inverted Polarity selection.