Spectrum Monitoring

The monitoring of the radio frequency spectrum for non-governmental use pursues the following objectives:

  • Resolve the cases of harmful interferences in the electromagnetic spectrum whether on a local, regional or global scale;
  • Uphold the process of efficient spectrum management;
  • Uphold the activities of surveillance and control of the compliance with the obligations under the licences for the use radio frequencies and under the frequency assignment authorisations, or under the regulations in the field of electronic communications using the radio spectrum;
  • Assess the compatibility between various radiocommunication systems;
  • Identify and disclose breaches of the international and/or bilateral spectrum agreements by users from the neighbouring countries.
The data gathered following the spectrum monitoring activity refer to:
  • the actual occupancy of the frequency spectrum by comparison with the occupancy of the frequency spectrum specified in the authorisation documents;
  • any deviation from the authorised values of the emission parameters for the authorised transmitters;
  • data on the identification of the emission parameters, tracking and content of the transmitted signal in the case of illegal or unauthorised transmitters.
The data are in fact the results of certain parameter measurements which concern: the central frequency, the occupied frequency band, the power, the type of modulation and the modulation parameters, the incoming signal direction, the periods of time in which the signals were on air, the identification of the transmitters, and the content of the transmitted signals.
The results of the analysis of data gathered during the monitoring activity are materialised in:
  • recommendations in view of removing the interferences (these recommendations may concern the holders of the broadcasting licences or the ANCOM spectrum management units);
  • identification and tracking of illegal, unknown or unauthorised emissions; the provision of this information to the ANCOM control units in view of starting the legal procedure;
  • tracking of the SOS frequencies or of the emissions in the emergency bands (if this mission is necessary);
  • identification of the frequencies or frequency bands which have a high risk of congestions or which already experience harmful interferences or international coordination issues, and elaboration of recommendations to the spectrum management units;
  • identification of the frequencies or frequency bands insufficiently used, in view of their reuse or, if such is the case, of their refarming;
  • identification of the transmitters which do not observe the authorised emission parameters;
  • identification of the frequencies or frequency bands available whether on a national, regional or local level.

Since the frequency spectrum is used 24/24, the frequency spectrum monitoring is a permanent process. Hence, in view of maintaining the spectrum as interference-free as possible, ANCOM acts both preventively (by continuously monitoring the frequency spectrum and thus removing the causes of interferences before they produce effects), and reactively (by answering in the shortest time possible to any request of interference resolution).