The present document specifies the minimum performance parameters for terrestrial digital fixed service radio
communications equipments operating in the 23 GHz frequency band and contains a complete revision in the areas of:
- additional systems with higher spectrum efficiency in the new class 4 systems;
- introduction of unique system type codes for regulatory reference to the various system types detailed in the
present document, refer to annex C and related categories of equipment classes of spectral efficiency;
- change of spectrum mask and adjacent channel selectivity of STM-0 systems in 28 MHz channel spacing to align
to EN 300 639 [32];
- introduction of new spectrum efficiency class 5 for STM-1 capacity for 28 MHz Adjacent Channel
Alternate-Polarization (ACAP as class 5a) and Adjacent Channel Co-Polarization (ACCP as class 5b),
see examples of the spectrum usage in figures 1.1a and 1.1b;
- technical specifications relevant to the EMC Directive [35], detailed in annex B.
NOTE: In EN 300 198 (V1.2.2) [36] there was provision for:
- parameters for wideband analogue systems;
- further options for digital radio systems (there referred as Grade A systems);
- specific antenna radiation patterns (now superseded by EN 300 833 [3]).
These options are not reprinted in this version as they are considered to be no longer of interest for ETSI members.
However, for regulatory purposes, they may still be referenced from EN 300 198 (V1.2.2) [36].
Digital systems are intended to be used for point-to-point connections in local and regional networks at data rates
between 2 Mbit/s and Synchronous Transport Module, level 1 (STM-1).
The parameters to be specified fall into two categories:
a) those that are required to provide compatibility between channels from different sources of equipment on the
same route, connected either:
- to separate antennas; or
- to separate polarizations of the same antenna;
b) pa (...abbreviated)