Sony XC-HR90 Technical Manual page 25

Setting the shutter speed using trigger pulse width
HD/VD input

Continuous HD input/Single VD input


Trigger 1
Shutter speed (Te)
External HD 1
External VD 1
(Single VD)
T:T=10 µs to 35 ms
Video out
WEN
1 This is an external input signal. Make sure to input

both HD and VD signals in this case.
2 Shutter speed (Te)

Te = Trigger pulse width + 5 µsec
(The effective trigger pulse width for the external
trigger shutter operation is between 2 µs and 1/4 s.)
3 Normal operation is resumed when the trigger pulse

width is 1/3 s or more. The trigger falling edge
restores external trigger shutter operation. At this
time, the 50 ms after the falling edge of the trigger
pulse is an external trigger input inhibition area.
There is no guarantee of operation for any trigger
input in this period.
External trigger shutter operation
2
4

990 H (Binning OFF)
495 H (Binning ON)
Normal operation 3
Trigger pulse width 3
4 Input the external VD within the period of 10 µs to

35 ms after the trigger falling edge ( and  in the
figure). There is no guarantee of operation for any
other input. If an invalid signal is input, the input is
changed to a valid signal and, after several V signals,
normal operation resumes.
Note
Make sure that the trigger signal and the VD signal
make up a pair.
An image is not output correctly when the next trigger
is input before the image for the previous trigger has
been output.
Mode Setting
Mode transition state
External input
External trigger
inhibition area
shutter operation
(50 ms)

Shutter speed
(Te) 2
Min. 10 µs

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