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

HD input

VD input

Note

At time of SYNC-NON

N

N

Internal sync mode

RESET 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.

At time of SYNC-

N

*

Internal sync mode. The presence of VD is ignored, and after a

RESET mode

 

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.

 

 

 

At time of reset restart

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.

 

 

 

At time of manual

N

N

Internal sync mode

shutter

Y

Y

External sync mode

 

Y

N

HD is synchronized to external. Normally not used.

 

N

Y

Disabled

*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 23.229 kHz)

( 3 ) Using the unit with external sync signal

When adjusting H (horizontal) phase refer to the item “7.2 (6) (6.1) 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 adjust H phase so that the H phases match.

Match the phase.

External Sync. signal

LVAL signal output

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