NorthStar MX500 Operator's & Installation Manual page 192

Operator's Manual
Turning Master and Slave Units Off
Before turning the power off to either the master or slave unit(s), make
sure you go to the CFG1 screen and disable the dual control function.
If the master unit is turned off while in dual control mode, the slave
unit(s) will not be connected to the antenna nor display a position.
The unit that remains on will alarm until the data link is re-established,
the unit is turned off, or Dual Control is turned off.
Dual-Control Integrity Monitoring
The Dual-Control Integrity Monitoing (IM) feature is an optional fea-
ture wherein two independently navigating MX500 units connected
as a master/slave configuration can compare their position solutions.
The unit that has the best position accuracy becomes the controlling
unit. Its Position, Speed and Course calculations are used for display,
navigation and data output. The basic requirements are; they are both
MX500 models with each own GPS/DGPS smart antenna and both
have the IM option enabled.
This IM feature can be found under the CFG/Dual Control menu in
units that has the IM license. This menu item is normally hidden and
will show only when the slave MX500 unit has been detected.
178
LAN Type: Host
cross-over cable
MX 422 Profe s sio nal DG P S N avigator
MX 500
MASTER UNIT
Hub/Switch/Router
LAN Type: Client
Ethernet
LAN Number: 1
MX 422 Profe s sio nal DG P S N avigator
OR
(CAT5)
(CAT5)
SLAVE UNIT
Multiple Unit Control
MX 500
Version 3.0