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(ARCHIVED) Minimum field strength consultation

As part of the compliance and enforcement role that Radio Spectrum Management (RSM) maintains, under the 1989 Radiocommunications Act and the Radiocommunications Regulations 2001, designations of minimum field strengths (MFS) can be made, to allow for interference complaints to be dealt with by RSM.

These levels are based on international best practice and the current planning criteria used for generation of spectrum licences.

RSM has consulted on changing MFS levels and subsequently gazetted the following levels.

These updates to MFS levels make the following changes:

  • remove the out-dated MFS protection levels for analogue television transmission (due to the digital switch-over that occurred at the end of 2013)
  • add MFS protection levels for digital television (DTT) services
  • update the MFS protection (levels) for AM and FM sound broadcasting.


The updated MFS levels are:

AM Sound Broadcast (525 - 1605 KHz)

  • 66 dB(μV/m) Daytime protection – from GE-75, section 4.6; Nominal usable field strength
  • 74 dB(μV/m) Night time protection – from GE-75, section 4.6; Nominal usable field strength


FM Sound Broadcast (88 – 108 MHz)

  • 66 dB(μV/m) – from ITU-R Recommendation BS.412.9 (urban environment for stereophonic signals)


Digital Television Broadcasting (510 - 686 MHz)

  • 48 dB(μV/m) – from ITU-R Recommendation BT.1368-9, Annex 2


Analogue Television Broadcasting

  • Remove all MFS protection levels

 

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