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Sony XC-EU50 Technical Manual Page 15

Sony corporation ccd black-and-white video camera module xc-eu50/eu50ce.
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For setting the shutter speed using the trigger pulse width
No HD/VD input (Internal synchronization)
External trigger shutter operation
1
Trigger*
1
Exposure
time (Te)*
4
Internal HD*
Video out
1
WEN
250 H (EIA)
293 H (CCIR)
*1 This is a signal input from outside.
*2 Exposure time (Te)
Te = Trigger pulse width + 97 µ sec (EIA)
Te = Trigger pulse width + 120 µ sec (CCIR)
(The effective trigger pulse width for the external
trigger shutter operation is between 2 µ s and 1/4 s.)
*3 The normal operation state is chosen when the
trigger pulse width is 1/3 s or more. The trigger
falling edge restores the external trigger shutter
operation. In this case, the area between the falling
edge of a trigger pulse and the subsequent 50 ms
period is an external trigger input inhibition area.
There is no guarantee of operation for any triggers
input in this period.
*4 The internal VD signals are output as long as there is
no external input and the HD/VD signal I/O switch
on the rear panel is set to INT.
2
Exposure
2
time (Te)*
2
T: T=10 µ s or more*
2
Normal operation*
Trigger pulse width
*
3
5
6
*
*5 In the external trigger operation, the image is
output for the internal VD falling edge after the
trigger falling edge (1 and 2 in the figure). If the
period from the trigger falling edge to the internal
VD falling edge (T in the figure) is under 10 µ s,
there may be a delay of 1 VD in the output. (3 in
the figure shows that the image is output for the
next internal VD). In this case, see WEN since the
image and WEN make up a pair. (The internal VD
falling edge and the beginning of the equivalent
pause in the V period of the SYNC have the same
phase.)
*6 When the external trigger shutter mode changes to
the normal operation mode, one WEN signal is
output.
Note
An image is not output correctly when the next trigger
is input before the image for the previous trigger is
output.
Mode Setting
Mode transition state
External input
inhibition area
External trigger
(50 ms)
3
shutter operation
3
Exposure time
(Te)*
2
T: T=under 10 µ s*
5
3
15

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