CTI Products AIB AstroTAC Interface - Manual (Page 7)

AIB Hardware Reference Theory of Operation
CTI Products, Inc.
68-10842-115
2
2. Theory of Operation
This section describes the operation of the AIB module in an MCN comparator
display system.
The AIB module must be configured for the comparator it is operating with, either
an ASTRO-TAC™ or an ASTRO-TAC™ 3000 Comparator. Section 4 describes
the ASTRO-TAC™ select option switch used for this configuration
When used with an ASTRO-TAC™ 3000 Comparator, the AIB provides
monitoring and control for up to 64 receivers. The AIB divides the receivers into
eight banks for compatibility with the MCN network. The defined receiver banks
are
• bank 0 supports receivers 1 through 8
• bank 1 supports receivers 9 through 16
• bank 2 supports receivers 17 through 24
• bank 3 supports receivers 25 through 32
• bank 4 supports receivers 33 through 40
• bank 5 supports receivers 41 through 48
• bank 6 supports receivers 49 through 56
• bank 7 supports receivers 57 through 64
When used with an ASTRO-TAC™ Comparator, the AIB provides monitoring
and control for up to 13 receivers, dividing the receivers into two banks (banks 0
and 1).
When installing a system, make sure that the User Interface Module is configured
for the correct bank for the receivers being monitored and controlled by the User
Interface Module. Refer to the hardware reference manual of the User Interface
Module for details about bank configuration.
2.1 Comparator Status
The AIB accepts VOTE, RECEIVE, DISABLE, and FAIL receiver status
messages from the ASTRO-TAC™ Comparator and sends them to a User
Interface Module over the MCN network. User Interface Modules, such as the IIB
(I/O Interface Module) or HIB (Host Computer Interface Module) then display the
comparator status information on a console or PC.
2.2 Controlling the Comparator
When a User Interface Module sends FORCE VOTE or DISABLE commands, the
AIB translates the commands for the ASTRO-TAC™ Comparator and sends them
to the comparator.