CHEETAH Hardware User’s Manual
Imperx, Inc.
Rev. 6.2
6421 Congress Ave.
7/7/2015
Boca Raton, FL 33487
+1 (561) 989-0006
46 of 152
By adding a delay after the readout of each line and at the end of the frame, the
overall output frame rate can be reduced matching the camera frame rate to each
applications specific requirements. Using the programmable line and frame delay to
add a delay before commencing readout of the next line or frame increases the
readout time and reduces frame rate.
CAUTION NOTE
1.
If the frame time is greater than 50ms the camera has to be kept still otherwise a
motion smear will appear on the image.
2.8
CAMERA TRIGGERING
2.8.1 Triggering Inputs
In the normal mode of operation, the camera is free running. Using the trigger mode
allows the camera to be synchronized to an external timing pulse. Trigger inputs can
be used to control the exposure times of Frame A and Frame B or can be used to
control Dual Video mode switching. In Dual Video mode, enabling the trigger input
causes the camera to output a user defined number of Frame As followed by a user
defined number of Frame Bs upon receipt of Trigger. In Dual Video Trigger mode,
the camera outputs Frame As until trigger is received and then outputs a user defined
number of Frame Bs.
There are three input modes available for external triggering – computer (CC),
internal (pulse generator), and external. Please note that the desired trigger input has
to be mapped to corresponding camera input. For more information, please refer to
Section 2.14: I/O Control.
-
“
External
” – the camera receives the trigger signal coming from the connector
located on the back of the camera.
-
“
Computer
” – the camera receives the trigger signal command from the CC
signals. .
-
“
Internal
” – the camera has a built in programmable pulse generator – refer to
“Pulse Generator” section. In Internal triggering mode the camera receives the
trigger signal from the internal pulse generator.
2.8.2 Acquisition and Exposure Control
For each trigger input the user can set the trigger edge, and the de-bounce (de-glitch)
time/
