21
Mode Settings
XC-HR57
1
1
2
2
Setting the shutter speed using trigger pulse width
◆
HD/VD input
• Continuous HD input/Single VD input
*1 This is an external input signal. Make sure to input
both HD and VD signals in this case. Input the
signal so that the VD phase aligns with the HD
falling edge.
*2 Exposure time (Te)
Te = Trigger pulse width + 6
µ
sec
(The effective trigger pulse width for the external
trigger shutter operation is between 2
µ
s 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.
*4 Input the external VD within the period of 10
µ
s to
65 ms after the trigger falling edge (
1
and
2
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.
External trigger shutter operation
Normal operation
*
3
Mode transition state
External input
inhibition area
(50 ms)
External trigger
shutter operation
Exposure time (Te)
*
2
Exposure time
(Te)
*
2
Trigger pulse width
*
3
T: T=10
µ
s to 65 ms
*
4
Min. 10
µ
s
525 H (Binning OFF)
263 H (Binning ON)
Trigger
*
1
External HD
*
1
External VD
*
1
(Single VD)
Video out
WEN
