• Overview
  • Specification


Fast Acquisition Enhanced Sensitivity 48 Channels GPS Receiver

The GT-3321 is a compact all-in-one GPS receiver that continuously tracks all satellites in view and provides accurate satellite positioning data. Its 48 channels provide fast satellite signal acquisition and short startup time. Acquisition sensitivity of -146dBm and tracking sensitivity of -160dBm offer good navigation performance even in urban canyons having limited sky view.
RS232-level serial interfaces are provided on the interface connector and supply voltage of 2.7V~6V is supported.
The GT-3321 is optimized for applications requiring good performance and low cost; it is suitable for a wide range of handhelds, asset tracking, Notebook, PDA-centric personal navigation system, and vehicle navigation products.

  • 48 channels GPS receiver, 32 acquisition & 16 tracking channels
  • High sensitivity of -160dB in tracking & -146 dB in acquisition
  • SBAS (WAAS, MSAS, EGNOS) support
  • Fast TTFF in all modes (a typical outdoor)
  • Hot-start in 2s,
  • Warm-start in 31s,
  • Cold-start in 32s
  • 2.5m CEP accuracy (DGPS)
  • Support standard NMEA-0183 & PTC command protocol
  • Configurable NMEA output
  • RoHS compliance


Parameter Specification
Receiver Type 48 channels
Re-acquisition sensitivity -146dBm
Tracking sensitivity -160dBm
Receiver frequency 1575.42MHz
Code C/A code
Accuracy (1) Position (2) Velocity   2.5m CEP(DGPS) 0.1m/sec
Startup Time hot start warm start cold start   < 2 sec < 31 sec < 32 sec
Update Rate 1Hz
Operational Limits (1) Altitude (2) velocity   < 18,000m < 515m/s
Dynamics 4G (39.2m/sec2)
Datum WGS-84
Protocol NMEA-0183 V3.01
Serial Interface RS232 signal output
Input Voltage +2.7V to +6V
Power Consumption <100mW (3.3V)
Connector 6 pins PS2 connector or 4 pins open wire with 1.8M cable