Topcon GR-5 - Page 18

Introduction
Topcon GR-5 Quick Start Guide
10
• Serial Port A – rimmed in black; used for
communication between the receiver and an external
device.
• Power – rimmed in red; used to connect the receiver to
an external power source. This port can also be used to
charge the batteries.
The following ports are used internally:
• Serial Port B – left free in the current release.
• Serial Port C – connect the modem and receiver boards.
Note that the GSM/GPRS/CDMA modem is located on
the RF modem board.
• Serial Port D – connect the receiver board and Bluetooth
module. Note that the Bluetooth module is located on
the RF modem board.
U
S
B
S
E
R
I
A
L
P
O
W
E
R
USB
(yellow)
Power
(red)
Serial A
(black)