GT-421 works in GPS difficult environments such as inside glove box, trunk, bumper etc.

Model Number: GT-421, Sensitive Tracker in tablet Brand Name: Navisys Key Specifications/Special Features: Mechanical Data –45 x 62 x 14 (mm)Weight – 39gI/O Interfaces

Power port：JST RCY connector - SYR-02T

Console port：Mini-USB, female (for factory use)

Button

• Power status indication (1 tap)
• GPS fix indication (2 taps)

LED (Blue)

• Normally OFF w/o button tapping
  • LED ON 0.5s as button tapped
    GPS fix indication period: 10s
  • GPS unfixed: always ON
  • GPS fixed: 0.5s ON 1.5s OFF

SIM connector：Push-push type SIM card holder

Technical Specifications
GSM/GPRS Characteristic Data

• Quad-band
  • 900/1800, 850/1900 MHz
  • GSM phase 2/2+ compliant
• GPRS connectivity
  • GPRS multi-slot Class 10 (default)
  • GPRS multi-slot Class 8 (optional)
  • GPRS mobile station class B
• Coding scheme：CS-1, CS-2, CS-3, CS-4
• Data transfer rate
  • Downlink 85.6kbps max.
  • Uplink 42.8kbps max.

GPS Receiver Performance Data

• Receiver type
  • Frequency: L1, 1575.42MHz
  • C/A code: 1.023 MHz chip rate
• Horizontal Position Accuracy
  • < 2.5m (Autonomous)
  • < 2.0m (WAAS)
  • (CEP, 50%, 24-hour static, - 130dBm, SEP < 3.5m )
• Velocity Accuracy
• <0.1 m/s (speed)
• <0.5° (heading)
• (50% @ 30 m/s)
• Time To First Fix：Autonomous (All at -130dBm)
• Hot start：1sec
• Warm start：32sec
• Cold start：32sec
• Sensitivity (Autonomous)
  • -147dBm (acquisition)
  • -163dBm (tracking)
• Max. Update Rate：5Hz
• Max. Altitude：< 18,000 m
• Max. Velocity：< 1,852 km/hr
• Protocol Support：
  • NMEA V3.00, OSP
  • UART: 4800~115200bps N,8,1;
  • GGA, GSA, GSV, RMC, VTG
• SBAS Support：WAAS, EGNOS, MSAS, QZSS, GAGAN
• Dynamics：< 4g

Electrical Data

• Power supply：3.5~4.2 VDC via RCY port only
• Power consumption：1.6~270mA depending on usage

Environmental Data

• Operating temperature：-20 ~ 70℃
• Storage temperature：-20 ~ 35℃ (long-term storage)