CHEETAH Hardware User’s Manual
Imperx, Inc.
Rev. 2.0.7
6421 Congress Ave.
7/7/2015
Boca Raton, FL 33487
+1 (561) 989-0006
117 of 152
Figure 5.10– Exposure control window
5.7.1.2.1 Exposure Control (Texp):
Sets the camera exposure period with three options.
Off
– no exposure control. The camera free runs and the
exposure time equals the frame time.
Trigger Pulse Width
– the pulse width (duration)
determines the exposure. Trigger must be enabled.
I
nternal
– internal camera registers controls the exposure.
Exposure time slider – sets the actual camera exposure in
microseconds. The minimum exposure time adjusts
accordingly, based on the camera mode of operation. The
slider can only be used when “Internal” mode is enabled.
5.7.1.2.2 Fixed Frame Period
These controls allow the user to control the frame rate and the line
rates of the camera. Since the camera outputs data at a very high rate,
the line time controls are used to match the camera output rate to the
interface bandwidth. The fixed frame period control should be
enabled to achieve the desired output frame rate.
Fixed Frame Period
– can be enabled or disabled. If
enabled, the frame time can be set using the slider bar (in
microseconds) or using the inputting the desired frame time
in the box to the right of the slider.
Line Time
- The camera will automatically compute the
minimum line time necessary to match the camera output
data rate to the interface data rate. As a general rule, the user
should always set the line rate to the minimum value.
