Installation manual

Page 14
Connection of GPS for position information
The position information used in the DSC distress message can be entered manually
from the keyboard, but to ensure that the position information is valid at all times a GPS
can be connected to the radio. The information transmitted from a GPS uses a
standard interface, designated NMEA 0183. The F1 DSC Radiotelephone can be
connected to this GPS interface directly via the two wires to the 15 pin D-sub
connector.
The NMEA protocol transmits the position information via named sentences. The
named sentences that can be used are: GGA, GLL, GNS, RMC and ZDA.
Table 3 Recommended wire size for connection of GPS
If it is necessary to use longer wires than those provided with the radio, wire
dimensions as specified should be used. As the GPS connection is sensitive to
electrical noise use of shielded twisted cable is recommended.
GPS From To Wire mm
2
Maximum length
NMEA 0183c F1 DSC GPS 0.25 5.0m
NMEA 0183c F1 DSC GPS 0.50 10.0m