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About the Camera Functions
Electronic Shutter Function
Normal Shutter
The electronic shutter is used for continuous video
output to capture fast-moving objects clearly. Shutter
speeds of 1, 1/100, 1/125, 1/250, 1/500, 1/1000, 1/2000,
1/4000, 1/10000, 1/20000 second are supported. Normal
Mode is supported for the Camera Mode.
External Trigger Shutter
The electronic shutter is used synchronized with
externally input trigger signals to capture fast-moving
objects clearly and in a precise position. There are two
types of external trigger shutter: an external trigger
shutter controlled by external input trigger pulse width
and a fixed speed external trigger shutter synchronized
with the timing of an externally input trigger. Trigger
Mode1 and Trigger Mode 2 are both supported for the
Camera Mode.
• Fixed external trigger shutter speeds:
1, 1/100, 1/125, 1/250, 1/500, 1/1000, 1/2000,
1/4000, 1/10000, 1/25000, 1/50000, 1/100000
second are supported.
• External trigger shutter speed is
Previous analog cameras 1
External
trigger
Internal-VD
Video out
Previous analog cameras 2
External trigger
Internal-VD
Video out
XCL-X700/V500
controlled by external trigger pulse width:
You can obtain an arbitrary shutter speed by setting
the external trigger pulse width to the range of 2 µsec
to 1/4 sec.
- When trigger signals are input through the 12-pin
External trigger pulse width shutter speed = external
trigger pulse width + 6 µsec
- When trigger signals are input through the
External trigger pulse width shutter speed = external
trigger pulse width + 5 µsec
Overlap Function
One way to increase frame rate while using slow to
mid-speed trigger pulse width shutter in the case of
previous analog cameras 1 is to input the rising edge
of the external trigger signals during the effective
image interval as indicated in case 2. Noise is
generated when the rising edge of the external trigger
signal is input during the effective image interval,
however, and the effective video output deteriorates
and becomes unusable. As a consequence, we must
input the signal after the effective image interval and
we cannot increase frame rate indicated as T2 in the
case of 2.
The frame rate results in:
T1 = approx. Effective image interval + Exposure time
Effective image interval
T2 = approx. Effective image interval
Functions of the XCL-X700
connector
DIGITAL IF connector
T1 = approx. Effective image interval + exposure time
controlled by the trigger signals
Exposure
time
Exposure
time
Noise
generated
13
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