The present document specifies the minimum performance parameters for low and medium capacity terrestrial fixed
service digital radiocommunications equipment operating in the frequency bands between around 3 GHz and 11 GHz
but nevertheless such systems should provide the efficient use of the spectrum under any conditions.
The present document covers equipment intended to be used at nominal data rates for PDH systems between 2 Mbit/s
and 2 × 34 Mbit/s and for SDH systems transmitting STM-0 signals with a VC3 payload capacity.
Consideration has to be given to special requirements of the local and access network especially different network
structures with high density nodes.
The systems considered are envisaged to operate in these networks having regard for existing hop lengths which mainly
depend on the intended frequency band, the performance objectives set by relevant ITU-R Recommendations or
national network operators requirements and existing propagation characteristics. The hop lengths are considered to be
up to about 100 km in the frequency band 3 GHz and 60 km in the frequency band 11 GHz taking into account diversity
techniques.
Typical applications include:
a) point-to-point links in local, regional and national networks;
b) mobile base station connections;
c) business networks connections;
d) customer access links.
The parameters to be specified fall into two categories:
a) Those that are required to provide compatibility between RF channels from different sources of equipment on
the same route, connected either to:
- separate antennas; or to
- separate polarization of the same antenna.
b) Parameters defining the transmission quality of the proposed system.
The standardization deals with RF and baseband characteristics relevant to low and medium capacity PDH and
STM-0 SDH transmission. Spurious emissions requirements are also included in the present document. EMC
requirements are cov (...abbreviated)