Data Translation DT3162, Руководство пользователя

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Video Input Signals
6
However, if you need to provide a differential pixel clock directly
to the board, you need to build you own cable.
Specify ExternalSource2 in software to select this pixel clock
source.
The frequency of the external pixel clock can range between 100 kHz
and 40 MHz, determined by the signal that you attach. This signal is
rising-edge sensitive.
Triggers
The DT3162 board supports both a software trigger and an external
trigger input. The external trigger input is provided through pin 6 of
connector J1 on the DT3162. You can access this signal using either
EP332 cable or the Camera Interface Module.
If you specify an internal trigger (Internal) using software, the
acquisition occurs when you execute an acquisition command.
If you specify an external trigger using software, the acquisition is
synchronized with an external event. Through software, you can
specify whether you want to acquire an image when a low-to-high
(OnLowToHigh) transition occurs or when a high-to-low
(OnHighToLow) transition occurs. You can also specify whether to
use a single external trigger (ExternalToStart) to start the acquisition
of a series of frames or fields, or whether to use a separate trigger
(ExternalForEach) to acquire each frame or field in a series of frames
or fields. Refer to
page 13 for more information on frames and fields.
Note: If you plan to use the expose/reset and/or strobe output
signals, you must specify either an Internal trigger (for use when
acquiring one frame only) or an ExternalForEach trigger (for use
when acquiring one or more frames).