Sumix SMX-15M5x - Manual (Page 32)

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Last updated: June 11, 2015
Sumix Video Camera: User Guide
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For color camera at the Advanced screen of main window gain can be controlled inde-
pendently for Red, Green, and Blue channels (R, G, B). The Red, Green, and Blue slid-
ers control the hardware gain for each color channel.
Checking the Keep Ratio box in the GAIN BY CHANNELS section of Advanced screen
allows controlling gain on three channels simultaneously and keeping the fixed Red;
Green; Blue gain ratio.
You can limit the maximal gain value. Use the Limit Max Gain check box in the Basic
window. Before limit the value of gain is analog, after limit it is digital.
Minimum, analog maximum and digital maximum values for gain are shown on hover.
FIGURE 5.5 Limit Max Gain Control
5.6.3 Frequency
The Frequency drop-down box at the Basic screen provides values for the pixel clock
frequency of the sensor. The lower the frequency, the higher the maximum possible
exposure time and the less the frame rate is. This control defines the frequency of poll-
ing the camera for its image stream.
5.6.4 Viewport
Viewport is a rectangular area of the sensor on which the image is scanned. It can have
variable size: from the full sensor field of view to the small area. The smaller vertical size
(in lines) of the viewport, the faster the scan process and the higher the frame rate is.
You may change the viewport in one of the following ways:
1 Select required predefined value from the VIEWPORT size drop-down box at the
Advanced screen
Note: When using camera in USB 2.0 mode default frequency is 12 MHz. If you set
too big frequency for USB 2.0 channel bandwidth video is restarted and frequency
is set to 12 MHz