CTI Products IIB Console Interface - Manual (Page 10)

IIB Hardware Reference Theory of Operation
CTI Products, Inc.
68-10844-115
5
If the comparator detects that a receiver has failed, it sends a FAIL command to
the Comparator I/O Module. Again, the Comparator I/O Module sends this FAIL
command to the IIB so that the user can see that the receiver has failed.
From the console, the user can generate FORCE VOTE or DISABLE commands
for each receiver in the system. The IIB detects these active signals and sends
them to the Comparator I/O Module, which then controls the comparator.
3.5 Receiver Banks
The IIB module is designed to operate with a maximum of 8 receivers. This group
of 8 receivers is called a bank. If the Comparator I/O Module supports more than
8 receivers (more than 1 bank of receivers), then multiple IIBs are required to
monitor and control these additional banks. Section 4 describes how the IIB is
configured to select the bank of receivers being monitored.
For example, the system shown in Figure 4 shows an ASTRO-TAC™ Comparator
that supports a total of 13 receivers. The AIB Comparator I/O Module separates
the 13 receivers into two banks of 8 receivers.
CA-80044-100 CA-80044-100
OUT
P/S
IN
IN
OUT
T
T
COMPARATOR CONSOLE
ELECTRONICS
IN
OUT
AIB
ASTRO-TAC
13 RECEIVERS
IIB
BANK 0
IIB
BANK 1
CONSOLE
Figure 4 - Multiple IIB System Example
Two IIBs provide support for the 13 receivers of the ASTRO-TAC™ Comparator.
The AIB module divides the 13 receivers into bank 0 (receivers 1 through 8) and
bank 1 (receivers 9 through 13). Each IIB has to be configured to operate with
one of the banks of the AIB. The first IIB would be configured to operate with
bank 0 of the AIB. The other IIB would be configured to operate bank 1 of the
AIB. This configuration is done using the option switches on the front of the IIB.
Refer to section 4 for details. With this configuration, the console will be able to
monitor and control receivers 1 through 13 of the comparator. The Link Fail
feature of the second IIB (configured for bank 1) can be enabled to monitor the
status of the AIB to ASTRO-TAC™
Comparator communication link as well as the
MCN network communications link. Refer to section 7.1. Because the second
IIB only monitors and controls receivers 9 through 13 (a total of 5 receivers) of
the ASTRO-TAC™
Comparator, its highest receiver is unused and therefore
available to display Link Fail status.