The present document specifies parameters for high capacity STM-1 digital radio-relay systems designed to operate in
defined bands up to 15 GHz. The channel spacing between adjacent cross-polar channels is generally approximately
30 MHz. Operation in the Adjacent Channel alternated cross-polar mode is foreseen. The present document specifies
the minimum performance parameters for terrestrial fixed service radio communications equipment operating in the
frequency bands up to 15 GHz and contains a revision from the previous version, in the area of:
modification of the RF spectrum masks taking into account the compatibility requirements.
Recognizing that in some geographical areas there is a high demand for spectrum two different grades of system has
been defined:
Class 5 Grade A: equipment spectral efficiency based on typically 64 or 128-states modulation scheme
(e.g. 64-QAM, 128-QAM, or equivalent) to be deployed, on parallel routes, with cross-polar adjacent channel
with less stringent adjacent channel performance (see table 8) or for trunked multi-channel applications;
Class 5 Grade B: equipment spectral efficiency based on typically 64 or 128-states modulation scheme
(e.g. 64-QAM, 128-QAM, or equivalent) to be deployed, on parallel routes, with cross-polar adjacent channel
with more stringent adjacent channel performance (see table 9).
The above classes are indicative only and do not imply any constraint to the actual modulation format, provided that all
the requirements in the present document are met.
Introduction of unique system type codes for regulatory reference to the various system types detailed in the
present document, refer to new annex C (normative) and related categories of equipment classes of spectral
efficiency.
Additional specification for CW spectral lines exceeding the spectrum mask.
The applications of these digital radio-relay systems are anticipated to be in the t (...abbreviated)