Alcorn Mcbride A/V Binloop Uncompressed, Руководство пользователя

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Alcorn McBride A/V Binloop Uncompressed User’s Manual Page 11
Control System
The Control system of the controller card is the heart of the Binloop.
This system handles all of the Binloop’s control interfaces. In
addition, the Control system is responsible for configuring and
controlling both the SMPTE Interface and the A/V Sync system that
also reside on the controller card. This system’s final significant role
is to configure and control the reproducers over a shared
communications line.
Control Interfaces
The Control system monitors all of the control interfaces, which
include Ethernet, Parallel, RS-232, and the Front Panel interface.
Anything that happens on these interfaces, in one way or another, is
translated by the Control system into a command to do something.
For example, the Control system may receive an RS-232 command to
play video 1 on reproducer 1. It must interpret this command, and
then send the appropriate control signal to the reproducer to make it
happen. Another common example would be using the Parallel
control port to start the SMPTE generator. The Control system would
sense a contact closure on the Parallel control port, and then instruct
the SMPTE Interface to start generating timecode.
You can read more about these control interfaces, and how they work
in a later chapter in this manual titled
Controlling the Binloop.
Reproducer Control
Without the Control system, the reproducers would do nothing except
generate black video and waste electricity. They have no knowledge
of the SMPTE clock value, RS-232 commands, Parallel input status,
or anything of the sort. They are simply designed to obey basic
playback commands and, in that regard, the Control system is their
boss. It is responsible for issuing configuration and playback
commands to the reproducers, and is capable of doing so with
tremendous precision.