Javad UHFSSRx, Руководство пользователя

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INTRODUCTION
UHFSSRx tri-band radio receiving only module is an universal radio operating in the UHF 406-470 MHz licensed
and 868 – 870 MHz European CEPT license free bands, allocated for narrow band telemetry, alarms and data
transfer applications like broadcasting of GNSS RTCM corrections; 902-928 MHz USA and 915-928 MHz Austra-
lian ISM (industrial, scientific and medical) license free bands.
In that way UHFSSRx communicates with any of broad range of JAVAD transmitters.
The UHFSSRx is developed for exacting customer needs for excellent reliability in noisy plant environments.
UHFSSRx OEM board
Operating at Ultra High Frequency Band
UHFSSRx operates in UHF frequency band covering both licensed and unlicensed frequencies. The following
are its key benefits:
Operating in UHF frequency band will provide a non-line of sight connection.
Single radio system covers the whole UHF frequency band from 406 to 470 MHz;
User selectable channel spacing (25 kHz, 20 kHz, 12.5 kHz or 6.25 kHz);
MODULATION TECHNIQUE
The design is based on high-level modulation techniques which include:
Modulation/ Channel Spacing 6.25 kHz 12.5 kHz 20 kHz 25 kHz
DBPSK – Differential Binary Phase Shift Keying 2.4 kbps 4.8 kbps 7.5 kbps 9.6 kbps
DQPSK – Differential Quadrature Phase Shift Keying 4.8 kbps 9.6 kbps 15 kbps 19.2 kbps
D8PSK – Eight Phase Shift Keying 7.2 kbps 14.4 kbps 22.5 kbps 28.8 kbps
D16QAM – Sixteen Quadrature Amplitude Modulation 9.6 kbps 19.2 kbps 30 kbps 38.4 kbps
GMSK – Minimal Shift Keying with Gaussian Filtering 2.4 kbps 4.8 kbps 7.5 kbps 9.6 kbps
4FSK- Four Level Frequency Shift Keying Not aplicable 9.6 kbps 15.0 kbps 19.2 kbps
Description and Operation