Operating At Ultra High Frequency Band; Modulation Technique; Introduction - Javad UHFSSRx User Manual

Description and Operation
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.

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
DBPSK – Differential Binary Phase Shift Keying
DQPSK – Differential Quadrature Phase Shift Keying
D8PSK – Eight Phase Shift Keying
D16QAM – Sixteen Quadrature Amplitude Modulation
GMSK – Minimal Shift Keying with Gaussian Filtering
4FSK- Four Level Frequency Shift Keying
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INTRODUCTION

UHFSSRx OEM board
6.25 kHz
2.4 kbps 4.8 kbps
4.8 kbps 9.6 kbps
7.2 kbps 14.4 kbps
9.6 kbps 19.2 kbps
2.4 kbps 4.8 kbps
Not aplicable 9.6 kbps
12.5 kHz 20 kHz
7.5 kbps
15 kbps
22.5 kbps
30 kbps
7.5 kbps
15.0 kbps
25 kHz
9.6 kbps
19.2 kbps
28.8 kbps
38.4 kbps
9.6 kbps
19.2 kbps
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