Trigger Controls
TDS3000B Serie s User Manual
3-69
Video Trigger
Choose video triggering to trigger on the odd fields, eve n fields, or
on all the lines of an NTSC, PAL, or SECAM video signal. See the
TDS3VID Extended Vide o or TDS3SDI 601 Digital Vide o
application module m anual for more informat ion if that module is
installed.
Bottom Side Description
Type Video
Standard 525/NTSC Triggers on a NTSC signal.
625/PAL Triggers on a PAL signal.
SECAM Triggers on a SECAM signal.
Source See page 3--64 for descriptions of
these menu items.
Trigger On Odd Triggers on odd or even fields in an
Even
interl
ced sign
l.
All Fields Triggers on any field in an interlaced
or noninterlaced signal.
All Lines Triggers on all lines.
Mode & Holdoff See page 3--66 for descriptions of
these menu items.
Key Points
Displaying the Trigger Source. You do not have to display a channe l t o
use it as a trigger source.
Sync Pulses. When you choose Video, the tri gger always oc curs on
negative-going sync pulses. If your video signal has positive-going
sync pulses, invert the signal using the Vertical menu. See page 3 --81
for information about invert ing a signal.