STC-A33A
User Guide
19
Rev 1.0
2. Pulse Width Trigger Mode (Non-Reset, External Sync)
Note 1: The camera does NOT switch to the 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 that reset VD timing.
Note 3: The exposure time is controlled by the pulse width of the trigger signal.
Note 4: External VD signal inputs continuously during the external sync mode. 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
1H
Trigger mode
Normal mode
N o t e 1
: A u t o m a t i c a l l y s w i t c h e s
t o n o r m a l m o d e i f t h e p u l s e
w i d t h o f t h e t r i g g e r s i g n a l i s
m o r e t h a n 5 0 0 m s e c .
Function mode
External VD
CCD exposure
Trigger signal
(Positive)
Video out
Note 3
WEN signal out
Note 4
Note 5
Note 2
