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4-3. Reset Restart
Input of an external reset-restart signal (VD) permits one screen of information to be output at
an arbitrary timing. To set this mode, set the external trigger mode selection switch (i.e., MODE
SELECT switch bits 5, 6, and 7) as illustrated in the diagram below.
Rear
75
EXT
ON
OFF
VIDEO OUT
DC IN/SYNC
Long Term Exposure
When the camera is used and sufficient sensitivity cannot be obtained for the reset-restart
function under normal operating conditions, or when observation of the trail of a moving
subject is desired, the exposure time can be extended to allow high-sensitivity images to be
obtained. To achieve this, please input from an external source a VD signal that has an ex-
panded VD pulse and VD pulse interval.
Input Timing Chart Example
External HD IN
External VD IN
(Internal VD)
Exposure period
VIDEO OUT
VIDEO INDEX
External VD interval: more than 1V
8
MODE SELECT Switch
HD/VD
INT
SHT
TRG
FRM
M.G
MIN
MAX
M GAIN
V reset
About 1H
1V
1
O
2
N
3
4
5
6
7
8
9
0
Exposure period
Reset restart
5
6
7
V reset
About 1H
Exposure period
1V
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