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GPS GM-R900 Receiver

Low-cost high performance GPS set with a USB connection

GM-R900 - this GPS has been designed specificaly for laptops and PC's, its both compact and has outstanding performance for accuracy and sensitivity. Featuring a simple USB conection to the PC its offers fantastic value for well under £100.

The USB connection of the GM-900 means no addtional USB to serial converter, and no need for additional power connections as power comes direcly from the USB connection.

This new generation of GPS includes the latest SiRFstar III technology for increased performance with 20 channel parallel acquisition. A technology that delivers improved satellite acquisition giving faster initial position and a built in high-sensitivity antenna for the best reception and tracking.

Please note:
The GM-R900 GPS does not have any user display (LCD) and must be used with a laptop and suitable software (seaPro).
If a GPS position is vital for safety, then a hand held GPS with its own display should also be carried in case of PC failure.


	The GM-R900 maybe small, but it contains a high performance 20 channel GPS receiver that will work through glass, Perspex or plastic enabling it to be placed inside the cabin close to a window or hatch. Even with a restricted view of the sky, this high performance waterproof GPS continues to report accurate positional data.
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Key features

	SiRF star III Chipset - 20 channel for high performance satellite reception
	Small size - ideal for use with portable navigation systems
	Direct USB connection to laptop or PC
	Powered directly from the laptop or PC
	Built in high-sensitivity antenna for the best reception. (-159dBm)
	Compatible with both seaPro and seaPro lite
	WASS / EGNOS enabled
	Waterproof housing
	Simple connection and setup

Tech specification:
General	Frequency CA code Channels	L1 1575.42MHz 1.0123Mhz chips rate 20
Sensitivity	-159dBm type
Accuracy	Position <15m CEP(95% horizontal, SA off (optimum conditions) Velocity 0.1 meters/second Time +-100ns synchronized to GPS time Note: There is improved accuracy with WAAS/ENGOS availability
Datum	WGS84
Acquisition rate	Hot start Warm start Cold start	1 sec average 38 sec average 42 sec average
Dynamic conditions	Altitude Velocity Acceleration Jerk	18,000 meters max 515meters/sec (1000kts) max 4g max 20 meters/sec/sec/sec max
Power	5 v +-0.5Vp-p DC input (fed from USB) at 80mA max
Serial port (virtual com port via USB driver)	NMEA-0183 V2.2 GGA,GSA,GSV,RMC at 4800 baud, 8 Bits, 1 stop, no parity Standard interface USB with virtual com port driver
Environmental	Operating temperature Storage temperature Operating humidity	-40C to +80C -45 to +85C 5% to 90% non-condensing
Physical	Dimensions approx (mm) 56 x 53 x 22.5 (2.20" x 2.08" x 0.88") Weight 96gms (3.39 oz)

Note: Specification may alter without notice, and presume best conditions for reception etc.

E&OE