Feedback Sought On Proposed Methodology For 700 MHz Exclusion Zones | ACMA

Feedback Sought On Proposed Methodology For 700 MHz Exclusion Zones

In preparing for the digital dividend auction, the Australian Communications and Media Authority (the ACMA) is seeking feedback on the proposed methodology used to generate maps showing exclusion zones in the 700 MHz band. Some digital television services may continue to legally operate in the 700 MHz band after the end of the reallocation period. Exclusion zones refer to areas surrounding any digital television (DTV) services, in which spectrum-licensed transmitters cannot be deployed.

Why is this important to the digital dividend auction?

Part 4 of the Radiocommunications Advisory Guidelines (Managing Interference from Transmitters – 700 MHz Band) 2012 (the RAG) sets out guidelines for 700 MHz spectrum licensees to manage potential interference to incumbent DTV services. A copy of the draft RAG can be found on the ACMA website in Word and PDF formats.

DTV broadcasting services are being cleared from the 700 MHz band through a restack process. The Government expects that this reorganisation of affected digital TV services will be completed by 31 December 2014. The measures in the RAG to protect incumbent DTV services in the 700 MHz band have been developed as a contingency in the event that some DTV services continue to legally operate in the 700 MHz band after this time.

Spectrum-licensed transmitters will be geographically separated from any such DTV services by an exclusion zone. The ACMA will publish a set of maps showing exclusion zones, in which a spectrum licensee must not deploy a service in any part of the 700 MHz band in the affected area.

The methodology used to define the exclusion zones will inform the maps that the ACMA is required to publish under part 4.2(2) of the RAG.

Prior consultation

The ACMA used the 700 MHz Technical Liaison Group (TLG) to consult on the methodology for developing the exclusion zones. The 700 MHz TLG included technical experts from the television broadcasting industry, prospective spectrum licensees and equipment manufacturers. The final 700 MHz TLG documents can be found on the ACMA website.

Your opportunity to comment on the proposed methodology

The ACMA recognises that stakeholders outside the TLG may also have an interest in the proposed methodology used to determine exclusion zones. Before coming to a final view, we are seeking general stakeholder feedback on this issue.

The proposed methodology can be found in the attached document: 700 MHz exclusion zone methodology (Word 1.4 mb or PDF 425 kb formats). In addition, the ACMA provides an illustrative example of an exclusion zone map (Word 1.1 mb or PDF 303 kb formats), as well as a summary of the ACMA’s consideration of industry comments (Word 1 mb or PDF 269 kb formats) received to date.

The 700 MHz TLG documents contain the ACMA’s preliminary view on the methodology for generating maps for the exclusion zones pursuant to part 4.2(2) of the RAG, as well as generating maps pursuant to part 3.2(2). For clarity, these issues are dealt with separately under this ACMA engage consultation process. However, all substantial material regarding the methodology is the same as that in the TLG paper.

This informal consultation process will run until 28 September 2012. You can submit a response by email to

If you have any questions about this process, contact Anna Cheung on (03) 9963 6837 or email

Last updated: 15 March 2017