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4.1.2 Master Mode
The master mode is a stand-alone operating mode that requires only DC power
for operation.
Figure 3 Master Mode Timing (Camera Link Model)
The exposure time in master mode is determined by the line period that is fixed at
N+70 clock cycles, where N is the number of pixels. See Table 1 for a listing of
these line periods.
4.1.3 Slave Mode
The slave mode allows the synchronization of the camera operation with a user
controlled exposure period. When operating in the Slave Mode, the user supplies
an LT (Line Transfer) signal and an optional LR (Line Reset) signal. The rising
edge of the LT signal initaites an end to the exposure time and a start of the
digital video readout. Used in conjunction with the LT signal, the LR signal
activates an electronic shutter when held low. For slave mode timing, see Figure
4.
4.1.3.1 Exposure Control
Slave mode camera exposure is determined by the LR and LT signals. The
exposure time is defined as the time between the rising edge of the LR signal and
the rising edge of the LT signal. The LR signal must be held active low (ON) for
a minimum of 6 clock cycles and must be inactive high (OFF) for a minimum of
6 clock cycles prior to and 32 cycles after the LT signal rising edge. The LT
signal must remain on (High) for at least 2 clock cycles and may remain ON until
2 clock cycles prior to the next line transfer. Because there are extra stages in the
CCD readout register there must be at least N+70 MCLK cycles between
successive LT commands.
The LR signal may be held high or left unconnected in slave mode. In this case
the integration time is defined as the time between two successive LT rising
edges.
PerkinElmer™ ™ Optoelectronics
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