Video Trigger - UNI-T UPO2102 User Manual

User's Manual

7.4 Video Trigger

The video signal includes the image and the time sequence information, it has multiple standards and
formats. MSO/UPO2000 provides the basic measurement functions, which can be triggered in the filed or
line of NTSC （ National Television Standards Committee ） , PAL (Phase Alternating Line) and SECAM
（Sequential Couleur A Memoire）, as shown in Figure 7-3.
(2) Video Format
a. PAL: The frame frequency is 25 frames per second, the TV scan line is 625 lines, the odd field is in
the front and the even field is in the rear.
b. NTAC: The field frequency is 60 fields per second, and the frame frequency is 30 frames per
second. The TV scan line is 525 lines. The even field is in the front and the odd field is in the rear.
c. SECAM：The frame frequency is 25 frames per second, the TV scan line is 625 lines, interlaced
scanning.
(3) Video Synchronization
d. Even field: Set to trigger and synchronize on the even field of the video signal.
e. Odd field: Set to trigger and synchronize on the odd field of the video signal.
f. All lines: Set to trigger and synchronize on the line signal of the video signal.
g. Specified lines: Set to trigger and synchronize on the specified video lines. User can use the
Multipurpose knob to specify the line number, and the setting range is from 1 to 625 (PAL/SECAM),
or from 1 to 525 (NTSC).
Hint：In order to observe the waveform details in the video signal, user can set the memory depth a little
bigger.
The MSO/UPO2000 series utilize the UNI-T original digital 3D technology, it uses a multi-level grayscale
 Instruments.uni-trend.com
Figure 7-3
MSO/UPO2000 Seri es
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