MM-014763-001, Rev. E
72
12 GPS NMEA-FORMATTED SERIAL DATA
CONNECTION
To obtain GPS NMEA-formatted serial data from the radio, use of the M5300/M7300 Option Cable
CA-012349-001 is required. Follow this procedure to complete the GPS NMEA-formatted serial data
connections:
1. Obtain M5300/M7300 Option Cable CA-012349-001. Each “leg” of this cable is approximately
65 inches long (166 centimeters).
2. Connect the cable’s 44-pin D-subminiature (DB-44) male connector to the DB-44 female connector
on the rear panel of the radio. Tighten the two jackscrews with a small flathead screwdriver. Do not
over-tighten.
3. Connect the cable’s DB-9 female connector to the computer’s serial port DB-9 male connector —
either directly or extended via a serial cable. Available serial cables for extending the length include
CA-013671-010 (10 feet) and CA-013671-020 (20 feet); see Section 11.2. Tighten the screws firmly,
and then rou
te the cabling as required. If the computer is not equipped with a DB-9 serial port
connector, the use of a suitable adapter is required, such as USB-to-RS-232 Adapter Cable
CN24741-0001.
4. Follow the manufacturer’s instructions on processing the NMEA-formatted GPS data from the radio.
If the M5300/M7300 Option Cable is not available, a 3-wire serial cable can be field-
fabricated. On the radio end, this cable must interface to the three GPS-related signals of
the radio’s 44-pin I/O Cable connector (pins 7, 31 and 32). See Table 11-1 for additional
information.
Industry software to process GPS information through this interface is not supported by
Harris.
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