MBX-4 User Guide
21
Grounding the Receiver
For best performance, connect the ground screw, labelled GND, on the
back of the MBX-4 to a counterpoise (artificial) ground. This ground
point may be a ground plate on a marine vessel, the chassis of a
vehicle. Other grounds may provide acceptable performance. You
should minimize the overall length of the ground wires for best
performance, if possible.
Connecting the Receiver To External Devices
Both receivers support RS-232C (default) and RS-422 interface levels for
communication with differentially capable GPS products. They feature
one external bi-directional data port used for transmitting RTCM SC-104
differential correction data to a GPS receiver, and for remote control
and querying of the beacon receiver using a terminal device. This data
port is located at the back panel of the receiver and is a DB9 socket
connector.
Warning!
Do not operate the MBX-4 with the 1.5 A fuse bypassed. Such
modification will void the product warranty.
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