Topcon GR-3 User Manual

Digital UHF Transmitter Specifications
P/N 7010-0736
A-11
Digital UHF Transmitter
Specifications
Table A-6 lists the Digital UHF Transmitter’s general specifications.
Digital UHF Receiver
Specifications
Table A-7 lists the Digital UHF Receiver Specifications
Data speed of serial interface Max 115200 bps
Forward Error Correction Available
Scrambling Available
Communication mode Half-Duplex
Table A-6. Digital UHF Transmitter Specifications
Parameter Selection
Output power 0.01 W (+10dBm), 0.02 W (+13 dBm),
0.05 W (+17 dBm), 0.1 W (+20 dBm),
0.25W (+24 dBm), 0.5 W (+27 dBm),
1W (+30 dBm)
Nominal output impedance 50 Ohms 2.0:1 VSWR
Output power control accuracy + 1dB (at normal test condition)
+2.0 dB and -3.0 dB (under extreme test
condition)
Table A-7. Digital UHF Receiver Specifications
Parameter Specification
Receiver sensitivity for DBPSK (@ BER
<1x10
-4
, over temperature -30°C to
+60°C
-115 dBm for 25 kHz Channel Spacing
-116 dBm for 12.5 kHz Channel Spacing
Adjacent channel selectivity -70 dB for 25 kHz Channel Spacing
-60 dB for 12.5 kHz Channel Spacing
Table A-5. GR-3 Digital UHF Modem General Specifications (Continued)
Parameter Specification

Topcon GR-3 Specifications

General

Brand	Topcon
Model	GR-3
Category	Receiver
Language	English