Hitachi V-212 Operation Manual page 30

ALTERNATE TRIGGER
Jittering wave as shown below may appear on the screen
when a gently-sloping signal is displayed by approximately
10 cycles or less, with the VERT MODE for the INT
TRIG switch and the ALT position for the MODE select
switch. For detailed and clear observation of each signal,
set the MODE select switch to the CHI or CH2.
(8) How to use TV exclusive synchronization
(T) On the video waveform of TV
In the work concerned with TV, complexed signals con
taining video signal, blanking pedestal signal, and syn
chronizing signal are often measured. However, since
the waveform is complexed, a special circuit is needed
to effect a stable synchronization with vertical waveform.
Video signal
Synchronizing
signal pulse
(SYNC pulse)
IH
(Horizontal)
IV (Vertical)
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