Trimble Outdoors r7-r8 Benutzerhandbuch

1 3       Setting up the Receiver

1 1 6      Trimble R7/R8 GPS Receiver User Guide

Each port or connector on the Trimble R8 receiver is marked with an 
icon to indicate its main function, as shown in Table 13.1.

Port 1 is a 7-pin 0-shell LEMO connector that supports RS-232 
comms and external power input. Port 1 has no power outputs.

Port 2 is a DB-9 male connector that allows for full 9-pin RS-232 
comms. Port 2 does not support power in or out. For more information 
on default port settings, see Chapter 18, Default Settings. For more 
information on connector pinouts, see Chapter 19, Cables and 
Connectors.

The TNC connector is for connecting a radio antenna to the 
Trimble R8 internal radio. A whip “rubber duck” antenna is supplied 
with the system for units with internal UHF or 900 MHz radios. This 
connector is not used if you are using an external UHF radio or GSM.

Depending on which module you have purchased, use this TNC 
connection for an external antenna to enhance the UHF or GSM.

The UHF antenna is approximately 16.5 cm (6.5 inches) long, and 
round. The GSM antenna is approximately 16.5 cm (6.5 inches), and 
flatter than the UHF antenna. Make sure that you use the correct 
antenna or the signal will be degraded.

For more information on connecting the Trimble R8, see the following 
sections in this chapter.

Port 1

Device, computer, external radio, power in

Port 2

Device, computer, external radio

RADIO

Radio communications antenna