Topcon GR-5 User Manual

GR-5 Operator’s Manual
A-12
Internal UHF Satel Modem Details
Table A-6 lists the internal UHF Satel modem’s general
specifications.
Transmission rates at 25 kHz spacing • GMSK/DBPSK – 9600 bps
• DQPSK – 19200 bps
Transmission rates at 12.5 kHz spacing • GMSK/DBPSK – 4800 bps
• DBPSK – 9600 bps
Data speed of serial interface Max 115200 bps
Forward Error Correction Available
Scrambling Available
Communication mode Half-Duplex
Table A-6. Internal UHF Satel Modem Specifications
General
Frequency Range 431–465; according to country
TX/RX: specific 4MHz frequency range allocated
according to country
Channel spacing 12.5KHz/20KHz/25KHz
Signal Modulation 4-level FSK or GMSK
Frequency stability <± 1.5 kHz
Type of emission F1D
Communication
mode
Half-duplex
Data speed of serial
interface
300–38400 bps
Data speed of radio
interface
19200 bps (25kHz channel)
9600 bps (12.5 kHz channel)
Data format Asynchronous
Table A-5. GR-5 Digital UHF Modem General Specifications (Continued)
Parameter Specification
This page is intentionally left blank

Topcon GR-5 Specifications

General

Brand	Topcon
Model	GR-5
Category	Receiver
Language	English