19
External
sync. signal
Camera
video output
Match
the phase.
EXTERNAL SYNC
When using the camera with an external sync, connect a composite video signal (C-VIDEO)
to the EXT SYNC terminal on back of the camera control unit. When the camera accepts
external sync, it is automatically switched from the internal sync to the external sync.
(1) External sync signal input conditions
C-VIDEO
:
SYNC section
0.3
±
0.1V
(75
Ω
unbalanced)
BURST section
0.3
±
0.1V
(2) External sync frequency range
Within
±
50 ppm referred to NTSC standard frequency
(H frequency 15733.5 Hz to 15735.0 Hz)
(3) Using the camera with external sync signal
When using more than two cameras in external synchronization, this adjustment allows
matching of picture tone between two cameras. Adjust H (horizontal) phase and SC (sub
carrier) phase if necessary.
(3.1) H (horizontal) phase adjustment
Observe the external sync signal and video out-
put signal on the camera with a dual trace oscil-
loscope, and adjust “H-PHS” of “SYNC” on the
screen menu so that the H phase matches.
(3.2) SC (sub carrier) phase adjustment
Perform a coarse adjustment for 0, 90, 180, or
270 degrees in “SC-PHS” on the screen menu and then perform a fine adjustment with
“SC-FINE”. Using a vector scope for the phase adjustment will provide more accuracy.
