Cheetah Python Camera with USB3 Interface
–
User Manual
December 5, 2017
Page
67
of
78
Rev 1.0
•
Software
–
the camera expects a single trigger (one clock cycle). You can trigger
the camera by sending the GenICam™ Trigger Sof
tware command.
5.5.2 Acquisition and Exposure Control
For each trigger input, set the trigger edge and de-bounce (de-glitch) time.
•
Triggering Edge
–
select one of the following to activate triggering edge:
-
Rising
–
uses the rising edge for triggering
-
Falling
–
uses the falling edge for triggering
-
De-bounce
–
de-bouncing trigger inputs prevents multiple triggering from
ringing triggering pulses. De-bounce provides eight choices of de-bounce
intervals:
-
Off
–
no de-bounce (default)
-
10
s,
50
s,
100
s, or
500
s de-bounce interval
-
1.0
ms,
5.0
ms,
10.0
ms de-bounce interval
•
Exposure Time
–
the exposure for all frames can be set in two ways:
-
Pulse Width
–
the trigger pulse width (duration) determines the exposure
subject to limitations.
-
Internal
–
the camera internal exposure register determines the
exposure.
1.
The de-bounce interval must be smaller than the trigger pulse duration. Adjust
the interval accordingly.
2.
When Triggering Pulse Width is enabled, Internal Exposure timing is not active.
5.5.3 Triggering Modes
A. Exposure Control:
With trigger mode enabled, you can set the exposure time using either the internal
exposure timer or the trigger pulse width.
In trigger mode, the camera idles and waits for a trigger signal. Upon receiving the trigger
signal, the camera starts integration for the frame, then completes the integration, and
reads out the image. If the next trigger occurs prior to completion of the readout, the
camera ignores the trigger and will complete the camera readout before accepting the
next trigger (Figure 39 and Figure 40). The exposure time can be set manually using the
internal exposure register setting or by the duration of the trigger pulse. Upon completing
the readout, the camera idles while
awaiting the next trigger pulse.
Figure 39: Trigger Mode (Internal Exposure Control).
