VCC-5CL1M
Rev.
905-0003-02
©2015 CIS Corporation. All rights reserved.
22
7.10.
Pulse Width Trigger Shutter Mode
□
This is the mode to start exposure with external input trigger signals, and set the exposure time with
the pulse width of the trigger signals.
□
Trigger operation is Clock-sync and H/V-sync Restart system.
The delay time (Exposure Time Delay
①
) from detecting trigger starting edge to starting exposure output
(TTL) , and the delay time (Exposure Time Delay
②
) from
detecting trigger completing edge to
completing exposure output (TTL) differ in each mode mentioned below.
Exposure Time Delay
①
2Tap 4Tap 8Tap 10Tap
Horizontal 2560 Pixel
51.3
27.1
15.1
13.1
Horizontal 2048 Pixel
41.9
22.3
12.5
11.0
Horizontal 1920 Pixel
39.3
21.1
12.0
10.6
unit
：
µs
Exposure Time Delay
②
2Tap 4Tap 8Tap 10Tap
Horizontal 2560 Pixel
49.0
24.8
12.8
10.8
Horizontal 2048 Pixel
39.7
20.0
10.2
8.6
Horizontal 1920 Pixel
37.0
18.9
9.7
8.2
unit
：
µs
□
The actual exposure period becomes wider approx. 1
µ
s
at leading edge of Exposure output
（
TTL
）
and
approx. 8
µ
s
at trailing edge.
□
Acceptable pulse width
3
µ
s
～
2frames
（
at TTL input
）
Functionally, no upper limitation is set but at long exposure the increase of noises and the decrease
of setup level and white clip level might arise.
□
The next trigger can be accepted during outputting a current image.
However, while the image output is not completed, do not input a
trigger which the next image output starts.
.
□
The camera internally ignores any trigger input between Exposure Time start and Read-out start. Refer
to (A) in the drawing below.
□
When a read-out period (FVAL=1) and an exposure start-up (start-up of Exposure Time) overlap, LVAL
and DVAL output Lo for approx. 4H, and also stop an image output.
