Page 6 GPS 15 TECHNICAL SPECIFICATIONSRev. A P/N 190-00266-002 PINOUT2.1 DESCRIPTIONThe GPS 15-F utilizes a six-pin LIF connector. The GPS 15-W utilizes a six-pin JST connector withmating wire harness included.Table 1. Signal/Wire DescriptionsGPS15Pin #Signal Name Description1 BACKUP POWER This input provides external power to maintain the battery-backed SRAMand real-time clock. This enables the user to provide backup power ifneeded for longer than the optional on-board backup battery will provide(roughly 21 days). Input voltage must be between +2.8 and +3.4 Vdc.2 GROUND Power and Signal Ground3 POWER Regulated +3.3 Vdc input. Peak operating current is 85 mA. Nominaloperating current is 80 mA.4 PORT 1 DATA OUT Serial Asynchronous Output.CMOS compatible output designed to interface directly with a hostmicroprocessor. Provides serial data which is formatted per “NMEA 0183,Version 3.0”. The baud rate is set during production to 4800, but other ratesare available.5 PORT 1 DATA IN First Serial Asynchronous Input.CMOS compatible input designed to interface directly with a hostmicroprocessor. Maximum input voltage range of 0 < V < 3.3.6 RF BIAS This input allows the user to externally apply a RF bias to the activeantenna. Units are shipped with this feature disabled. By default, the unitwill use an internal voltage to power the active antenna.