UsGlobalSat BR-305 Product Specification

PRODUCT SPECIFICATION

RS232 GPS RECEIVER

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GPS Receiver Specification

Product Feature

• “SiRF Star Ⅱe/LP” high performance and low power consumption chipset

• All-in-view 12-channel parallel processing

• Built-in active antenna

• High sensitivity to satellite signal

• Cold start under 45 seconds, average

• Superior urban canyon performance

• FoliageLock for weak signal tracking

• Build-in SuperCap to reserve system data for rapid satellite acquisition.

• Supported NMEA 0183 command: GGA, GSA, GSV, RMC, GLL, VTG

• Super-cohesive magnetic for mounting on the car

• LED indicator for GPS fix or not fix

LED OFF: Receiver switch off

LED ON: No fixed, Signal searching

LED Flashing: Position Fixed

• Non-slip on the bottom

• RS232 interface with PS2 connector

System Specification

Electrical Characteristics (Receiver)

Frequency L1, 1575.42 MHz

C/A Code 1.023 MHz chip rate
Channels 12

Sensitivity -170 dBW

Accuracy

Position Horizontal 10m 2D RMS (SA off)

Velocity 0.1m/sec 95% (SA off),

Time 1 micro-second synchronized to GPS time

WAAS enabled 7m 2D RMS

Datum

Datum WGS-84

Acquisition Rate

Hot start 8 sec., average (with ephemeris and almanac valid)

Warm start 38 sec., average (with almanac but not ephemeris)

Cold start 45 sec., average (neither almanac nor ephemeris)

Reacquisition 0.1 sec. average (interruption recovery time)

Protocol

GPS Protocol Default: NMEA 0183 (Secondary: SiRF binary)

GPS Output Data SiRF binary >> position, velocity, altitude, status and

control ; NMEA 0183 protocol, and supports
command: GGA, GSA, GSV, RMC, VTG, GLL (VTG
and GLL are optional)

GPS transfer rate Software command setting (Default : 4800,n,8,1 for

NMEA )

Dynamic Condition

Acceleration Limit Less than 4g

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