Trimble Inc. 6848090 Manual De Usuario

3          Configuration and Installation

3 4     SNB900 Radio-Modem User Guide

To achieve coverage to all points in a project site, you can add up to 
four repeaters to the network. Repeaters retransmit data packets in a 
way that prevents mutual interference with the base and with each 
other.

A rover receiver uses data packets from the base or from a repeater, 
whichever it receives first. (The operation of the repeaters is 
transparent to the rovers.)

To install the SNB900 radio-modem as a repeater:

1.

If the network has only one repeater, make sure that the SNB900 
radio-modem is configured as Repeater 1. If the network has 
multiple repeaters, make sure that the repeaters are numbered 
sequentially. For example, this radio-modem cannot be 
Repeater 3, unless there is also a Repeater 1 and a Repeater 2 in 
the network.

2.

Assemble the antenna and then attach the antenna to the 
antenna bracket. 

3.

Attach the antenna bracket to a tripod or pole.

4.

Connect the antenna cable to the radio-antenna port on the 
SNB900 radio-modem. For the location of this port, see 

on 

5.

Connect a 12 VDC power source to one of the ports on the 
SNB900 radio-modem. You can use either the LEMO connector 
or the 26-pin connector for this, depending on which power 
source you are using.

6.

Make sure that the Sync, Tran, and Rcv messages are flashing on 
the radio-modem display.