This document introduces the appearance, features, hardware interface, software interface, function test, troubleshooting, specifications, and warranty information of the CF GPS receiver GM-270.
The manual introduces the Holux GM-270 handheld GPS receiver, highlighting its quick positioning capability, built‑in WAAS/EGNOS correction, rechargeable battery, and support for NMEA‑0183 version 2.2 output. It also describes the device’s hardware interfaces, including the MCX external antenna connector and the serial COM port.
Technical specifications are listed, covering dimensions, weight, antenna type, sensitivity, update rate, satellite tracking capacity, accuracy, power consumption, and operating temperature. The document also includes NMEA sentence formats (GGA, GSA, GSV, RMC) and warranty information. This manual is written in Japanese.
| Dimensions | 91 x 50 x 20 mm |
|---|---|
| Weight | <30 g |
| Antenna Type | Built‑in passive antenna |
| Sensitivity | -175 dBW |
| Update Rate | 1 Hz |
| Maximum Simultaneous Satellites | 12 |
| Fast Start Time | 3 seconds |
| Position Accuracy (CEP) | 5‑25 m |
| Speed Accuracy | 0.1 m/s |
| Operating Temperature (Storage) | -45 °C to +85 °C |
| Power Consumption | 80 mA at 3.3 V |
The device measures 91 mm in length, 50 mm in width, and 20 mm in height.
It can track up to 12 satellites simultaneously.
The GPS data is updated at a rate of 1 Hz.
The GM-270 uses a built‑in passive antenna, with an optional external MCX antenna connector.