Specifications

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4.6. ACC-515 (GPS INTERFACE CIRCUITS)
The radio series outputs an industry standard NMEA GPS sentence on the DB-15 connector
when the GPS option board is installed. The GPS module releases NMEA-0183 format data
every 1sec. To prevent unnecessary data from the GPS engine, the GPS output is controlled by
Pin 6 of J1 (GPS_OUT), and besides, power save mode can be executed by Pin 4 of J1
(PSAVE). Even if GPS engine enters power save mode, Back-up voltage should be supplied to
Pin 3 of J3 (B+) in order to use warm start at wake-up. The GPS option board and GPS antenna
require a different supply voltage level compared with the main supply voltage of the radio. The
GPS interface circuit supplies a regulated 3.3V power to the GPS board.