Sensor Technologies America, Inc.
1345 Valwood Parkway, Suite 320 :: Carrollton, Texas 75006
Phone: (972) 481-9223 :: Fax: (972) 481-9209 :: Toll Free: 1 (877) - SENTECH (736-8324)
www.SentechAmerica.com
11
STC-1100C & STC-1100D Series
Operating Manual
Rev. 0.2 - Updated September 26, 2005
5. Variable Integration Shutter Trigger Operations
Note:
Double Speed 2:1 Interlace mode is not used in these variable integration
shutter trigger operations.
Important:
DIP Switch No. 5 must be turned ON and No. 6 must be turned OFF
when the camera operates in the “Variable Integration Shutter Trigger Mode”.
a) One Pulse Variable Integration Shutter Trigger Operations
I) Functions
With this “one-pulse Variable integration shutter trigger mode”, one
trigger pulse input signal can control camera’s integration time
based on its pulse duration time. In other words, the integration
time starts at the falling edge of the trigger oulse then ends at its
rising edge (see the drawing below). Since “XSUB” is activated in
the camera at the falling edge of the trigger pulse and “XSG” is
activated at the rising edge, the integration time is controlled very
accurately.
Video signal output is sent out frm the camera at the moment “t2” period
ends. “t2” starts at the rising edge of the trigger pulse and ends at the
18th internal HD pulse (2:1 Interlace Mode) or 33rd internal HD pulse
(Progressive Mode) after the rising edge of the trigger pulse. Therefore,
“t2” is exactly 19H (2: Interlace Mode) or 34H (Progressive Mode) if the
rising edge of the trigger oulse is synchronizing to the internal HD pulse.
In the case the rising edge of the trigger pulse is not synchronizing to the
internal HD pulse, this “t2” will fluctuate depending on the relational
timing of the two pulses as described in section 2.
This camera provides a capability to synchronize to External HD in the
variable integration shutter trigger mode. With this feature, user can
easily create HD-synchronized trigger pulse for the above mentioned
operation since the internal HD synchronizes to the external HD applied to
the camera.
