MX51x/BRIM (Backup Receiver with Integrity Monitoring) Feature
The Integrity Monitoring (IM) feature allows the dual-control MX51x units to constantly
compare each GPS position solutions and, if configured to do so, give an alarm and/or
automatically switch to the unit with the “better” GPS solution.
Both MX51x units are functional D/GPS receivers and both continuously calculate GPS
solutions. The IM algorithm continuously compares the two position solutions. If the GPS
Source is set to Automatic, it begins by using the Master calculated position. However, it
continuously compares the “used” solution to the “other” solution. If the “other” solution
is better, it will switch to use that position solution. Essentially, the Master mode will
transfer automatically to the unit whose position solution is being used for navigation.
Cross-Over LAN Cable Diagram
Once the Dual-Control IM license is enabled, CFG1/Dual Control screen looks
like this:
DUAL CONTROL
Mode: Master (options: Master, Slave)
Dual Control: Yes (options: Yes, No)
GPS Source: Automatic (options: Automatic, Master, Slave)
Integrity Alarm: Yes (options: Yes, No)
GPS Source: Master (options: Master, Slave)
Dual Status: OK (options: OK, No Comm, Mirroring)
To enable the functionality of the Dual Control Integrity Monitoring, you must
set the following to:
Dual Control: Yes
GPS Source: Automatic
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