Some more inform from the planning documents:
Commercial Radio Australia (CRA) advised the committee that commercial radio broadcasting licensees have expressed interest in rolling out digital radio to 39 licences areas within the next three to five years. In addition to the trial markets of Canberra and Darwin, another two of the 39 licence areas—Hobart and the Gold Coast—were identified as regional markets that could proceed to planning and licensing immediately.
Another of the planning principles (Planning Principle 2—Proposed frequency allotment planning approach) specifies that a maximum effective radiated power (ERP) of 5 kW will be used in the allotment planning process for the majority of licence areas. However, due to the proximity to other licence areas, certain licence areas will need to be authorised at a power less than 5 kW at the outset. Conversely, more isolated areas may be permitted to operate at a power (ERP) greater than 5 kW.
Canberra
The ACMA proposes to:
- allot the frequency block 8D for the Canberra RA1 foundation DRMT category 1 licence for the DRMT licensee
- reserve the frequency block 9C for the Canberra RA1 DRMT category 3 licence for the DRMT licensee.
If in future any more significant rollout of national multiplexes in regional areas is contemplated, the national broadcasters will need to operate a number of single frequency networks (SFNs), with each SFN utilising one of the two available frequency blocks of 9C or 8B. Having regard to this, the ACMA proposes that the planned Canberra RA1 category 3 DRMT licence be co-channelled with the Sydney RA1 category 3 DRMT licence on the frequency block 9C. This will leave the second national frequency block (8B) free to be used for category 3 DRMT licences in a SFN in regional licence areas adjacent to Sydney.
Due to its close proximity to other licence areas, the initial draft technical specifications for the Canberra RA1 propose a 5 kW maximum ERP, which is consistent with the nominal cap .
Sydney
The draft variation to the NSW/ACT DRCP proposes to:
- Make minor amendments to the technical specifications for the Sydney RA1 licence area relating to the main Sydney transmitters and the co-channel repeaters serving Penrith to better describe the nominal locations of DRMTs and remove duplicated information from the technical specifications
Brisbane
The ACMA proposes to:
- vary the technical specifications for the three Brisbane DRMT licences to vary the output radiation pattern to allow greater ERP levels and improve coverage within the Brisbane RA1 licence area.
The current technical specifications also have restrictions on ERP that were intended to limit signal overspill into the Ipswich and remote licence areas. Because of the various limitations, the Brisbane RA1 services are only able to operate at a maximum ERP of 23 kW, well below the maximum ERP of 50 kW currently specified in the output radiation pattern of each Brisbane technical specification.
The proposed changes also involve relaxing the overspill limit towards Ipswich and removing the limit towards Eagle Heights/Tamborine in the remote licence area. The changes proposed are intended to balance the legitimate interests of licensees in the Brisbane licence area with those of licensees in adjacent licence areas. The changes proposed will allow the services to operate with a maximum ERP of 50 kW and are intended to improve coverage within the Brisbane licence area, while having minimal impact on the adjacent licence areas.
Gold Coast
The ACMA has undertaken modelling of coverage, assuming a directional antenna (two faces of panels) located at the Mt Tamborine transmitter site, along with proposed co-channel transmitters at Brisbane South East (Darlington Range), Currumbin and Springbrook transmitter sites.