Toshiba CS6940CL User Manual

Page 13

Rev 1.0

7.2 Random trigger shutter

In the random trigger shutter mode, you can shoot and grab an image at an arbitrary timing by trigger

signal input from the external.

External trigger signals can be input either from the camera link I/F CC1 or DC IN connector.

If polarity is set to negative polarity, exposure starts at the falling edge of the trigger.

The random trigger shutter of this camera can be operated in two types of mode: fixed mode and pulse

width mode. How to determine the exposure time differs depending on the mode.

1) Fixed mode

The exposure time is determined by the setting value for the shutter speed.

FVAL is output in sync with the first LVAL after the end of exposure time.

FVAL

DATA OUT

LVAL

DVAL

exposure time

TRIG

CCD

approx. 2.0

2) Pulse width mode

The exposure time is determined by the pulse width (exposure time = pulse width + approximately 28

s).

Set a pulse width of 1H (approximately 53.3

s) or more.