UsGlobalSat br-305 Guia De Especificação

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 

 

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

WGS-84 

 

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) 

 

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 ) 

 

Acceleration Limit

Less than 4g