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Holux GM-270 Compact Flash GPS Receiver

24th September 2002


Holux has just announced a new Pocket PC and Laptop Computer GPS Receiver, styled very similar to the Pretec Compact Flash GPS Receiver with the same external antenna socket on the side of the antenna, this will give Pocket PC users a much varied selection of GPS Receivers to use with their Pocket PC's and Laptop Computers.





12 parallel satellite-tracking channels for fast acquisition and reacquisition.


High speed signal acquisition using 1920 time/frequency search channels.


Built-in hardware Tracking Loop Processor WAAS/EGNOS Demodulator and NDGPS/U.S. Coast Guard Beacon support.


Low power consumption.


Built-in rechargeable battery for memory and RTC backup and for fast Time to First Fix.(TTFF)


Support  NMEA0183 v2.2 data protocol and SiRF binary code.

Trickle Power Enabled for Power Saving.

Enhanced algorithms  -SnapLock  and SnapStart  provide superior navigation performance in urban, canyon and foliage environments.

Support CF card type I connector suitable PDA, Hand Held PC or PC device.




Tracks up to 12 satellites.

Antenna Type: Built in Active Antenna



Receiver:L1, C/A code

Minimum Signal tracked: -175dBW

Snap Start: <3 sec (at <25 minutes off period)

Dimension: 91 X 50 X 20mm

Update rate: 1HZ

Weight: <50g

Operation Temperature:-10℃ to+ 70℃

Operation Humidity:5% to 95% No Condensing

Store Temperature: -45℃ to + 85℃

Power consumption: <80mA at 3.3V +/- 10% input

Position accuracy:


Non DGPS (Differential GPS)

NMEA output protocol: V2.2

 Position     5-25m CEP without SA

 Baud rate:4800bps

 Velocity    0.1 m/sec, without SA

 Data bit : 8

 Time           1 usec sync GPS Time

 Parity:  N


 Stop bit : 1


 Output format:

   < 2.2m, horizontal 95% of time

 Standard: GGA,GSA,GSV,RMC

   < 5 m, vertical 95% of time

 Optional: GLL,VTG,SiRF binary


NMEA Input messages

H/W: Compact Flash - CF type I

NMEA/SiRF Binary Set altitude, position,

S/W: Emulated COM-port (Com1~8; auto select)

date & time, select output messages and rates

Acquisition time:

Dynamic Conditions:

Reacquisiton   0.1sec.averaged

Altitude         18,000 meters             

Hot start            8sec.averaged

                    ( 60,000 feet) max

Warm start       38sec.averaged

Velocity        515 meters/second

Cold start         45sec.averaged

                    ( 700 knots) max

LED function:

Acceleration  4G, max

Power On/Off and Navigation

Jerk               20 meters/second, max



Update Indication



Link to NoteBook

Link to PDA

Active Antenna



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