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GNSS
Chapter 3 • Operational features
48
3500834-0001 Revision C
The Hughes 9502 terminal supports a Global Navigation Satellite System (GNSS)
feature. During start up, if the UT detects a GNSS device connected to the GNSS
serial port, it will attempt to obtain a position fix from the GNSS device via NMEA
messages.
The serial port is a DB9 male, configured as a DTE and supports autobaud between
the valid NMEA rates of 4800bps and 38.4kbps.
The GNSS device must provide a fix via the RMC or GGA NMEA messages. Typically a
straight through DB9 serial cable can be used with the correct plug for the GNSS
device.
Pin
1
Not connected
2
Rx data - input to the 9502
3
Tx data – output from the 9502
4
Not connected
5
Ground
6
Not connected
7
Not connected
8
Not connected
9
Power control: apply +12VDC to power off the unit
Table 6: DB9 pinout
Function
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