Readout - Princeton Instruments PhotonMAX System Manual

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•
Clear Post-Sequence: Cleans continuously after the data acquisition sequence ends.
The camera continues cleaning until a new exposure is set up or started, the abort
command is sent, the speed entry number is changed, or the camera is reset.
•
Clear Pre- and Post-Sequence: Cleans the number of cleans selected times before
each sequence and cleans continuously after the sequence ends. The camera
continues cleaning until a new exposure is set up or started, the abort command is
sent, or the camera is reset.
•
Clear Pre-Exposure and Post-Sequence: Cleans the number of cleans selected
times before each exposure and cleans continuously after the sequence ends. The
camera continues cleaning until a new exposure is set up or started, the abort
command is sent, or the camera is reset.

Readout

Introduction
The PhotonMAX: 512B uses a frame transfer CCD with an active area of 512x512 pixels
and equivalent area of "frame transfer or masked" pixels, shown in Figure 28. (Note:
typically there are additional rows and columns for internal reference).
In standard frame transfer mode, the active area is exposed for certain time, typically
milliseconds to seconds. The acquired image data is then transferred to frame transfer
area before reading it out via extended multiplication gain register or standard serial
register. By using frame transfer, full 512x512 sized frames can be captured as frequently
as every 33 msec or at 30 Hz as determined by the readout time. Even though region of
interest (ROI) and/or binning can improve the time resolution, it is limited to millisecond
regime. For more information on the CCD exposure-readout operations, see "Exposure -
Readout Modes", page 48.
WinView and WinSpec allow you to specify the type of readout (full frame or binned),
the output amplifier, and the gain (the number of electrons required to generate an ADU).
Dual-Readout Port Operation
The PhotonMAX is configured with software-selectable dual-readout amplifiers, also
referred to as "ports", shown in Figure 28. The two amplifiers are listed below.
PhotonMAX System Manual
Figure 28. EMCCD Array Structure
Version 1.B