Topcon GR-5 - Page 173

P/N 7010-1004
A-3
Operating time
Average with
modem “on” and 12
SVs tracked.
Using new
batteries, operating
at room
temperature, and
transmitting at 1 Hz
rate.
• Modem = off – approx. 20 hours
• AA-sized battery shells attached to both battery slots
and modem is off – approx. 2.5 hours
FH915
• Receive-only modem – approx. 14 hours
• Transmitting at 250 mW – approx. 12 hours
• Transmitting at 1 W – approx. 10 hours
• GSM/GPRS modem in urban areas - 13 hours
Digital UHF
• Receive-only modem – approx. 14 hours
• Transmitting at 250 mW – approx. 12 hours
• Transmitting at 1 W – approx. 9 hours
• GSM/GPRS modem in urban areas - 12 hours
Satel
• Receive-only modem – approx. 14 hours
• Transmitting at 250 mW – approx. 12 hours
• Transmitting at 1 W – approx. 11 hours
• GSM/GPRS modem in urban areas - 12 hours
External power 1 port
Input voltage 9 to 21 V DC (for work)
10 to 21 V DC (for charge battery)
Maximum Charge Current <=2 Amp
Table A-1. Receiver General Specifications (Continued)