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2: Installation
Table 2-2 provides pin-assignment information for the data port of the
receiver, at the default RS-232 interface level. Table 2-3 provides the
pin-assignments for the data port at the RS-422 level.
To establish communications between the beacon receiver and your
GPS, you must connect the transmit pin(s) of the beacon receiver to the
receive pin(s) of the GPS receiver.
Optionally, you may connect the receive pin(s) of the beacon receiver to
the GPS, or communicating device transmit line. This is required for
display of GPS information on the MBX-4 LCD display when in BX-E
mode, and for tuning of the MBX-4 receiver remotely. You must connect
the signal ground (pin 5) of the beacon receiver to the signal ground of
the external GPS device.
Table 2-2: Receiver data pin-out, RS-232 interface level
Pin number Signal Description
2 Transmit RTCM SC-104/status output
3 Receive NMEA Input
5 Signal ground Signal return
Table 2-3: Receiver data Pin-out, RS 422 interface level
Pin number Signal Description
1 Transmit + RTCM SC-104/status output +
2 Transmit - RTCM SC-104/status output -
4 Receive NMEA input -
5 Signal ground Signal return
7 Receive + NMEA input +
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