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Operator's Manual
Functional Description
MX420lBR
This is a dual-head CDU system where a MX420/8 (operating as a
master) and a MX42012 (operating as a slave) aresupplied, A smart
DGPS antenna (MX42IB) is supplied as a standard equipment. The
antenna unit is connected only to the MX420/8 master unit.
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MX420 BR Beacon and Remote Configuration
MX420lBRIM (Dua/ Contro/lntegrity Monitor)
This is an enhanced Dual-Control configuration wherein two MX420/
8 CDUs and two MX421B smart DGPS antennas are supplied. These
two MX420/8 units are connected in dual-control configuration but
they operate as independent navigator units with dedicated MX42lB
antennas. The Integrity Monitor (IM) feature is a software option that
works only in the MX420/8 CDUhardware.
This configuration allows data to be shared between two remotely
separated stations (i.e. navigator's station and helmsman's station),
with independent access to various information fields. The purpose of
this configuration is to enable each CDU to calculate its own position,
then check the operational status of the other GPS receiver. The GPS
receiver with the best overall operational status then provides the
system position. This provides a fully redundant system, with self-
recovery capabilities. The Integrity Monitor function can be set to
Automatic switch over, forced to the Master unit, or forced to the
Slave unit for position and navigation functions.
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Unit 1
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MX420lBRIM System Configuration
4
Version 1.5
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