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7. 6 External Sync
When using the unit with an external sync signal, input HD and VD to CC3 and CC4 of the DIGITAL terminal.
When the external sync signal is input, the camera automatically switches its sync from the internal sync to the
external sync.
The operation is as shown below, depending on the unit's status and how external sync signals are input.
Shutter mode
At time of SYNC-NON
RESET mode
At time of SYNC-RESET
mode
At time of reset restart
At time of manual
shutter
* Either Y or N is permitted.
( 1 ) External sync signal polarity
HD: 2 to 5V(p-p) Negative
VD: 2 to 5V(p-p) Negative
( 2 ) External sync frequency range
(External sync with HD, VD)
Within ±1% (at horizontal sync frequency of 31.84 kHz)
( 3 ) Using the unit with external sync signal
When adjusting H (horizontal) phase refer to the item "7.2 (5) (5.1) Adjusting horizontal phase".
(3. 1) H (horizontal) phase adjustment
Observe the external sync signal and the LVAL signal output
waveform of the unit with a dual trace oscilloscope, and ad-
just H phase so that the H phases match.
30
HD input
VD input
N
N
Internal sync mode
Y
Y
External sync mode
N
Y
Only V reset is applied due to VD input. Normally not used.
Y
N
HD is synchronized to external, but video is not output
because there is no VD input. Normally not used.
N
*
Internal sync mode. The presence of VD is ignored, and after
a specified time after a trigger input, V reset is applied.
Y
*
HD is synchronized to external. The presence of VD is
ignored, and after a specified time after a trigger input, V
reset is applied.
Y
Y
HD is synchronized to external. Video is output due to VD
input.
N
Y
HD is synchronized to the inside of the camera. Video is
output due to VD input.
*
N
Video is not output because there is no VD input. Normally
not used.
N
N
Internal sync mode
Y
Y
External sync mode
Y
N
HD is synchronized to external. Normally not used.
N
Y
Disabled
Note
Match
the phase.
External
Sync. signal
LVAL signal
output
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