CHEETAH Hardware User’s Manual
Imperx, Inc.
Rev 1.7
6421 Congress Ave.
8/26/2016
Boca Raton, FL 33487
+1 (561) 989-0006
41 of 121
2.5
CAMERA TRIGGERING
2.5.1 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. .
There are four input modes available for external triggering – computer (CC),
internal (pulse generator), external and software. 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.
-
“Software”
– the camera expects a single trigger (one clock cycle) generated by
the computer. The user can trigger the camera by depressing the GUI Trigger
button or by writing any data to address 0x6030.
2.5.2 Acquisition and Exposure Control
For each trigger input the user can set the trigger edge, and the debounce (de-glitch)
time.
1.
“
Triggering Edge
” – the user can select the active triggering edge:
-
“
Rising
” – the rising edge will be used for triggering
-
“
Falling
” – the falling edge will be used for triggering
2.
“
De-bounce
” – the trigger inputs are de-bounced to prevent multiple triggering
from ringing triggering pulses. The user has eight choices of de-bounce interval:
-
“
Off
” – no de-bounce (default)
-
“
10
”
s, “
50
”
s, “
100
”
s, “
500
”
s de-bounce interval
-
“
1.0
” ms, “
5.0
” ms, “
10.0
” ms de-bounce interval
3.
“
Exposure Time
” – the exposure for all frames can be set in two ways: