Pre-Acquisition Setup - CCD
5.3.4.2 - Horizontal Pixel Shift
Readout Rate
Horizontal pixel shift readout rate denes the rate at which pixels are read (or digitized) from the shift register. The faster
the horizontal readout rate the higher the frame rate that can be achieved. Slower readout rates will generate less noise
in the data as it is read out. The available rates are system dependant, and can be selected from a drop-down list on the
Setup Acquisition dialog box, of which an example is shown below:
Pre-Amplier Gain
Pre-amplier gain determines the amount of gain applied to the video signal emerging from the CCD and allows the user
to control the sensitivity of the camera system. Depending on the system there are up to three options available. They
are again selected from a drop-down menu on the Setup Acquisition dialogue box:
These normalized gain settings will correspond to system sensitivities specied on the performance sheets (in terms of
electrons per A/D count) which accompany the system.
Selecting higher pre-amplier gain values (i.e. x2 or x4) will increase the sensitivity of the camera (i.e. fewer electrons will
be required to produce one A/D count) and provide the lowest readout noise performance. However this may result in
the A/D converter saturating before the single pixel / register capacity of the CCD sensor is reached.
To Next Page
Loading...
Need help?
General
