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     Introduction

     SNRx10 Radio Modem User’s Guide

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CAUTION – Exposure to radio frequency (RF) energy is an important safety consideration. The 
FCC has adopted a safety standard for human exposure to RF electromagnetic energy emitted 
by FCC-regulated equipment as a result of its actions in General Docket 79-144 on March 13, 
1986. Proper use of this radio results in exposure below government limits. Trimble 
recommends the following precautions:
•    Do not operate the transmitter when someone is within 20 cm (7.8 inches) of the antenna.

•    Do not operate the transmitter unless all RF connectors are secure and any open 
connectors are properly terminated.
•    Do not operate the transmitter near electrical blasting caps or in an explosive atmosphere.

•    Do not co-locate the antenna with any other transmitting device.

The SNRx10 product is a family of radio-modem modules. Modules are available for 
450 MHz, 900 MHz and 2400 MHz frequency bands. These modules share a 
common housing and electrical interface to simplify machine installation and 
integration. The following table lists the available module combinations:

The 450 MHz band radio modules are used to receive GPS data in Compact 
Measurement Record

 (CMR) and RTCM formats from a reference receiver, for 

precise machine positioning.

The 900 MHz band radio modules are used for the following tasks:

to receive GPS data in CMR and RTCM formats from a reference receiver, for 
precise machine positioning.

SNR410

Y

Y

SNR910

Y

SNR2410

Y

SNR910+2400 MHz

Y

Y