STC-A33A
User Guide
22
Rev 1.0
2. Edge Preset Trigger Mode (Non-Reset, External Sync)
Note 1: The camera does NOT switch to normal mode when the long exposure mode is selected.
This timing chart shows when the long exposure mode is selected.
Note 2: The internal VD signal is reset immediately after the exposure is finished; the video output signal is sent out
according to the timing of the VD being reset.
Note 3: The exposure time is controlled by the camera setting communication (Refer to the command 20H and 21H) or
the DIP Switch on the rear panel as “shutter speed”.
Note 4: External VD signal inputs continuously during the external sync mode. The external VD signal is disregarded
during the trigger mode.
Note 5: The WEN signal does not output when the exposure by the trigger signal does not exist.
Normal mode
Exposure time
Max. 1H
Trigger mode
Normal mode
Automatically switch to the normal
mode if the pulse width of the
trigger signal is more than
500 mseconds
Note. 1
Function mode
Internal VD
CCD exposure
Trigger mode
(Rising edge)
Video out
Note. 2
Note. 3
WEN signal out
Note. 4
Note. 5