Topcon HiPER GD, Operator'S Manual

Page: 34 / 180

Introduction
Topcon HiPer GD and HiPer GGD Operator’s Manual
1-12
Your receiver may be equipped with one of the following
communication boards (however, your receiver may also be
configured without a radio modem):
• UHF modem – a Pacific Crest PDL (Positioning Data
Link) modem; either a 450–470 MHz or 430–450
MHz; receiving only.
• Spread Spectrum – either a 915 MHz or 2.4 GHz
modem.
• GSM – dual-band, dual-user cell phone frequency
modem (Europe and Japan: 900/1800 MHz; USA and
Canada: 900/1900 MHz).
NOTICE
To comply with RF exposure requirements,
maintain at least 20cm between the user and the
GSM radio modem.
• Broadcast data receiver – a TPS-BDR communication
board for receiving differential corrections from DGPS
radio beacons and geostationary L-band satellites
broadcasting OmniStar® data.
The Base station operator is responsible for complying with
local regulations for radio operation. In the US, the FCC
regulates the use of radio transmitters, requiring a license.
Broadcasting without a license can result in severe
penalties including the confiscation of your radio and
GPS+ equipment. Please call TPS Customer Support if you
need advice on obtaining the proper license in the USA.
The internal radio modem comes with a number of preset
frequencies programmed at TPS.