Topcon GR-5 User Manual

P/N 7010-1004
A-11
Internal Topcon UHF Modem General
Specification Details
Table A-5 lists the Digital UHF modem’s general specifications.
Protocol FH915, FH915+
Transmitter (TX)
Carrier power 250 mW (24 dBm)/1 W (30 dBm), user selectable
Receiver (RX)
Sensitivity -105 dBm at 10-4 BER
Dynamic range 105 dBm
Data communications
Serial interface RS232
Serial data rate 9600, 19200, 38400, 57600 bps, user selectable
Effective radio link
rate
9600, 10200, 17000, 51000 bps
User selectable for FH915; automatic selection for
FH915+
Error correction FEC (15.7), majority decoding
Antenna Type
Type 1/2 wave articulating whip
Connector Reverse polarity TNC
Gain 2.5 dBi
Table A-5. GR-5 Digital UHF Modem General Specifications
Parameter Specification
Operating frequency range
country/region/purpose dependent
410-470 MHz
Modulation techniques GMSK, DBPSK, and DQPSK
Channel spacing 12.5 kHz/25 kHz
Table A-4. Internal TPS Spread Spectrum Specifications (Continued)
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Topcon GR-5 Specifications

General

Brand	Topcon
Model	GR-5
Category	Receiver
Language	English