Product Architecture; Radio Link; Frequency Bands - Motorola PTP 600 Series User Manual

4 Product Architecture

4.1

Radio Link

The PTP 600 Series Bridge consists of an identical pair of units deployed one at each end of
the link. The radio link operates on a single frequency channel in each direction using Time
Division Duplex (TDD). One unit is deployed as a master and the other as a slave. The
master unit takes responsibility for controlling the link in both directions.
The non-line-of-sight (NLOS) aspects of the product are provided by Multiple-Input Multiple-
Output (MIMO), coupled with Orthogonal Frequency Division Multiplexing (OFDM)
modulation.
4.2

Frequency Bands

The PTP 600 Series Bridge has been developed to operate within license exempt frequency
bands as well as the licensed 2.5GHz band in the USA. The current product range supports:
x
USA BRS-EBS Post-Transition band 2.5 GHz (2496 – 2690 GHz)
x
ETSI 5.4 GHz band B (5.470-5.725 GHz)
x
ETSI 5.8 GHz band C (5.725–5.850 GHz) and the USA 5 GHz ISM band (5.725-5.850
GHz)
x
US Federal 4.5 GHz band (4.404-4.596 GHz)
x
USA and Canada Public Safety 4.9 GHz band
x
Military 4.8 GHz band
x
5.9 GHz band (5.825-5.925 GHz)
The PTP 600 Series Bridge has been designed to coexist with other users of the band in an
optimal fashion using a combination of Transmit Power Control (TPC), Spectrum
Management functionality and Antenna beam shape. In order to maintain link availability, the
product employs adaptive modulation techniques that dynamically reduce the data rate in
severe or adverse conditions.
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4 Product Architecture