Topcon GR-5 - Page 174

GR-5 Operator’s Manual
A-4
Consumption
Average with
modem “on” and 12
SVs tracked.
Using new
batteries, operating
at room
temperature, and
transmitting at 1 Hz
rate.
• Modem = off – approx. 2.5 W
• Urban areas with short distance to cell sites and GSM/
GPRS is on – approx 4.2 W
FH915
• 915 receive-only modem – approx. 3.4 W
• 915 modem transmits at 250 mW – approx. 5.0 W
• 915 modem transmits at 1 W – approx. 6 W
Digital UHF
• Receiver: 3.3W
• Receiver + Modem (RX mode): <= 4.3W
• Receiver + Modem (TX 0.5W): <= 6W
• Receiver + Modem (TX 1W): <= 7W
Satel
• Receiver: 3.3W
• Receiver + Modem (RX mode): <= 4.3W
• Receiver + Modem (TX 0.5W): <= 6W
• Receiver + Modem (TX 1W): <= 7W
Battery charge Connect the AC adaptor to charge the internal battery.
Available run charge when connected to external battery.
Charging time ~6 hours for full charge
On-board Backup battery for timekeeping and almanac data storage;
10 years minimum operation
I/O
Communication
Ports
A high speed RS232 serial port (rimmed in black), a USB
port (rimmed in yellow), and an internal Bluetooth
communication port (port D).
Table A-1. Receiver General Specifications (Continued)