Features

The SGM-208 series provides a host of features that make it easy for integration and use.

1. With SiRF Star ? high sensitivity chipset.

2. High performance receiver tracks up to 20 satellites.

3. Compact design ideal for applications with minimal space.

4. A rechargeable battery sustains internal clock and memory.

5. User initialization is not required.

6. One full duplex serial RS-232 port or USB port meets all applications.

7. Waterproof design for all weather.

8. Built-in low noise, high gain active antenna.

9. LED display provides users visible positioning status.

10. Support Standard NMEA-0183 and SiRF Binary protocol.

Electrical Characteristics

General

Frequency L1, 1575.42 MHz

C/A code 1.023 MHz chip rate

Channels 20 channels all in view tracking

Antenna internal

Sensitivity

Tracking -159 dBm typical

Accuracy

Position < 10 meters, 2D RMS

< 7 meters 2D RMS, WAAS corrected

1-5 meters, DGPS corrected

Time 1 microsecond synchronized to GPS time

Datum

Default WGS-84

Acquisition Rate (Open Sky)

Hot start 1 sec, average

Warm start 38 sec, average

Cold start 42 sec, average

Reacquisition 0.1 sec, average

Dynamic Conditions

Altitude < 18,000 meters (60,000 feet)

Velocity < 515 meters/sec (1000 knots)

Acceleration < 4G

Jerk 20 meters/sec max

Power Consumption

Main power input 5.0 ±5% VDC input.

Supply Current 80 mA @5V

Serial Port

Electrical interface One full duplex serial communication via RS232/ TTL interface.

Protocol message NMEA-0183, SiRF Binary.

Default NMEA GGA, GSA, GSV, RMC, (VTG, GLL, and ZDA optional).

4800 baud rate (other rate optional).

8 bits data, 1 stop bit, no parity.

Weight < 85 g

Environmental Characteristics

Operating temperature range -40 o C to +80 o C

Storage temperature range -45 o C to +95 o C