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CV-L105
6.2.2. Internal Trigger. Shutter mode.
In this mode, the camera does not require an EXT TRIG signal to be issued to the camera. The
line rate (scan rate) is generated inside the camera. The camera will operate continuously with
its internal trigger.
The scanning interval is equal to the time set by the SCAN parameter.
The exposure time is equal to the Shutter time set by the SHUTTER parameter via RS-232C.
The permitted range for the scan rate is 151 µs to 32.5 ms (corresponds to 6.6 kHz to 30 Hz).
The permitted range for the exposure time, SHUT value, is 1 µs up to (SCAN time – 150 µs).
(Always less than SCAN.)
To use this mode:
Set function: Trigger Internal
Mode SCAN
SHUTTER value 1 µs up to 32.35 m
s
SCAN value 151 µs through 32.5 ms
Clock, Binning and other functions
Input: Ext. trigger through the LVDS connector
Important notes on using this mode:-
• It is only recommended to use this mode when there is not change of speed in the object
being scanned. If the speed of the object changes, the aspect ratio in the vertical
(scanning) direction will change.
LEN
Data out
Exposure
Exposure time
= SHUTTER value
Scan interval = SCAN value
LEN
Data out
Exposure
Exposure time
= SHUTTER value
Scan interval = SCAN value
30 MHz 1t=33.3 ns
15 MHz 1t=66.6 ns
Value in ( ) is for Binning
Fig. 13. Timing for internal shutter mode
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