Rainbow Electronics GM-R305 User Manual

GM-R305

Low-Power Receiver for GPS Applications

The GM-R305 GPS receiver provides EverMore’s
latest 12-channel GPS technology, contained inside a
mouse-like box with a host connection cable.

The GM-R305 pushes forward EverMore’s high
standard for rapid startup time and high performance in
foliage and urban canyon environments. Applications will
benefit from improved reliability provided by newest GPS
kernel firmware. With sophisticated system design, the
GM-R305 provides robust performance for users who
need an economical GPS solution.

The GM-R305 feature set includes NMEA-0183
output, one serial I/O, and position & velocity filtering.
With Flash-based program memory, the firmware is
upgradeable, thus protecting your GPS investment.

The GM-R305 is an all-in-one GPS receiver that is
designed for the end-users with less understanding on
GPS knowledge. It is ready for use with PDA, Notebook,
and PC in various situations: Marine, Land Survey, travel
assistance and Vehicle tracking.

EverMore Technology Inc.

2F, No.7, R&D Road 1, Science-Based Industrial Park, Hsinchu, Taiwan, 300, R.O.C. http://www.emt.com.tw

GM-R305

Low-Power Receiver for GPS Applications

Features

z Easy connector to PC/Notebook
z Built-in patch antenna
z Enhanced LED indicator
z Receiver, Twelve parallel tracking channels
z Fast TTFF and low power consumption
z On-board rechargeable battery sustained

real-time clock and memory for fast satellite
acquisition during power-up

z Automatic cold start with no user initialization

required

Performance Specifications

General: L1 1575.42MHz, C/A code, 12-channel,

Carrier-Aided with HWTrack©

Sensitivity: -143 dBm Minimum

Environmental Specifications

Operation Temperature: -30°C to + 80°C
Storage Temperature: -40°C to + 90°C
Operating Humidity: 5% to 95%

Physical Characteristics

Primary Power: 5V DC
DC Current: Max. 125mA

Serial Ports: RS-232 Level
1PPS: CMOS LVTTL Level
Dimensions: 2.29” L x 1.57” W x 0.84” H

(58.2mm x 39.9 mm x 21.5 mm)
Weight: 3.88oz (110g)

User Protocol

Protocols: EverMore @ 4800/9600baud, 8N1
NMEA-0183 v2.20 @ 4800 baud, 8N1

Update Rate: 1Hz
Accuracy: Position: 15m CEP without S/A

Velocity: 0.1m/sec without S/A
Time: ± 1µs

Acquisition: Cold start: < 120sec average
Warm start: < 45sec
Hot start: < 15sec

Reacquisition: < 100millisecond
Dynamics: Altitude: -1000m to + 18,000m

Velocity: 500m/sec
Acceleration: ±4g

NMEA Messages: GGA, GLL, GSA, GSV, RMC, and VTG

Interface Connector

DB9 (Female): TX, RX, 1PPS
PS/2(Male): VCC input 3.8V~8V

Or
USB : VCC Input 5V

Applications

z Land/Marine Navigation
z Telematics
z Fleet Management
z Asset Tracking
z Timing Reference

EverMore Technology Inc.

2F, No.7, R&D Road 1, Science-Based Industrial Park, Hsinchu, Taiwan, 300, R.O.C. http://www.emt.com.tw