Furuno GH-81 GPS Receiver

GH-81 GPS Receiver for Handheld Devices:

The new Furuno Model GH-81 is a 16 channel parallel GPS receiver specifically designed for handheld devices. The GH-81 incorporates technologies that offer incredibly low power consumption and set new standards for miniaturization. The GH-81 has high-speed search engines in each of it's 16 channels, enabling even faster TTFF (Time to First Fix) when compared with it's predecessor, the Model GH-80. Thanks to our newly developed digital chip and power management algorithm, this faster TTFF is implemented without an increase in power requirements or circuitry size - power consumption is actually reduced by 35%.

In full operation, the receiver starts searching and tracking satellites and then obtains the position fix. Meanwhile, the reciever sleeps in order to save power, shutting down as many circuits as possible. When in this full operation status and with the sleeping status cyclically repeated autonomously, we call it Intermittent Operation Mode. This enables a much lower power consumption. The Intermittent Operation Mode can be initiated simply by sending commands to the receiver.

The Model GH-81 has, in addition to our Long Term Intermittent Operation Mode, a newly developed Short Term Operation Mode. The difference between the Short term and Long term is the unit of time used for power management. The Long term mode will switch the operation status and sleeping status back and forth in a multiple of one second; for example, 40 seconds full operation and 30 seconds sleep. The Short term will switch the status within a second; for example, you may set the receiver to search/track satellites and output position fix within 400 milliseconds and then let it sleep for the remaing 600 milliseconds. In this case, you will reduce the current requirement down to 1/3 of the full operation current and still the GH-81 appears as if it is in full and continuous operation.

Features:

Designed specifically for the handheld device market
Fast search engine offers incredibly rapid TTFF without increase in power requirement or circuitry size
Same small size as GH-80 GPS Receiver - 21mm X 21mm
Software compatible with the GH-80
Intermittent Operation Mode enables a much lower power consumption:

<2 mA in Low Power Intermittent Mode
17 mA in Full Satellite Tracking Mode
22 mA in Satellite Searching Mode
(All values given at @ 3.3VDC Main Power)

Download a PDF Brochure

Technical Specifications