Hitachi V-209, Руководство по эксплуатации

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fc
x
tr
=
0.35
Where, fc: Frequency band
(Hz)
tr: Rise time (s)
The rise time and fall time are determined by the time
elapsed between the
I 0'1 to 9Qc,r \'a lues of pulse width.
(6)
Synchronization of complexed waveform
In the case shown in the Fig. (a) below where two wave­
forms have difference in amplitude alternate. the wave­
form is doubled if the trigger level is not set properly. In
the case where the trigger level is selected as
Y line two
waveforms. one starting with A and advancing to B. C. D, E.
F .... and the other starting �ith E and advancing to F,
G.
H, I .... will appear alternately on the screen. They
will be doubled as shown in Fig. (b), for which no synchro­
nization can be taken.
In such a case, rotate LEVEL clockwise until the trigger
level comes to Y' line. Then the waveform on the screen be­
comes the one shown in F1g. (c) above wh1ch starts with
B and advances t o C, E. r, .
. .
and which allows synchro­
niLation.
�
(a) Signal waveform
Y' Trigger level
y �Lting line
(b) When the uiggc
r
(c) When the
uigger
...:ning
level
•�
Y
selling
level i'
y·
Synchronization of complexed waveform
(7)
How to use TV exclusive synchronization
CD
On the image waveform of TV
In the work concerned w1th TV. comple:-.ed signals con­
taining video signal. blanking pedestal signal. and syn­
chronizing s1gnal are often measured. llowever, since
the waveform is complexed, a special circuit IS needed
10 effect a stable syncrhonization with vertical waveform.
Synchronizing
signal pulse
(SYNC pulse)
IV
(vertical)
------�
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