Engineering reportRestack channel planningMelbourneENGINEERING REPORT TPS2012/06

SEPTEMBER 2012

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Executive summary 1

Proposed channel allotments 2

1 Introduction 31.1 Scope 31.2 Channel planning principles 31.3 Channel block identifications for the Melbourne licence area 41.4 Consultation 41.5 Terminology 51.6 Transmitter specifications 5

2 Block identification and channel allotment proposals 62.1 Background 62.2 High-power sites 62.3 Melbourne licence area repeater sites 6

3 Implementation/sequencing considerations 133.1 TLAP timing windows 133.2 Constraints on the restacking of sites 13

Appendix A1—Planning principles 15

Appendix A2—Proposed channel plan 17

Appendix A3—Maps 19

Appendix A4—Service-by-service constraint list 22

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Executive summary

This engineering report accompanies, and is intended to read with, documentation related to the draft Television Licence Area Plan (TLAP) for the Melbourne TV1 Licence Area. It provides background explanations for the proposed channel block identifications and channel allotments for broadcast sites and other relevant types of sites such as retransmission sites within the Melbourne TV1 Licence Area.

The proposed channel allotments are discussed in detail in section 2 of the report, and are summarised in the table following this executive summary. The proposed block identifications and channel allotments follow the restack planning principles unless specifically noted.

Section 3 of the report discusses implementation sequencing constraints that may need to be captured as events or circumstances in the draft TLAP or as licence conditions. However, the determination of restack ‘timing windows’ is not covered in this report. It is considered separately in the discussion paper for metropolitan licence area draft TLAPs that is being released together with this engineering report.

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Proposed channel allotmentsThe table below summarises the channel allotments proposed in this engineering report. These allotments will be included in the related draft TLAP instrument.

Sites shown in rows with grey shading have all retransmission services. These services are not expected to be included in the TLAP instrument. However, they have been taken into account in channel planning for the TLAP.

Channels that are allotted in the TLAP for currently operating services that will be restacked are identified by ( ).

General area served

Block SBS ABC HSV GTV ATV UA

Melbourne1 A (29) 7 12 6 8 11 10Marysville C (57) 34 (60) 35 (63) 36 (51) 37 (54) 38 39

Warburton (VIC) C (57) 34 (60) 35 (63) 36 (51) 37 (54) 38 39Healesville C 34 35 36 37 38 39Monbulk E 50 (52) 49 46 47 (53) 48 51

Selby C (50) 34 (47) 35 (41) 36 (44) 37 (54) 38 39Upwey C (50) 34 (47) 35 (41) 36 (44) 37 (54) 38 39

Ferntree Gully D (50) 40 (47) 43 41 44 (54) 45 42South Yarra1 D (57) 40 (60) 43 (63) 41 (51) 44 (54) 45 42

Melbourne Inner Suburbs D (57) 40 (60) 43 (63) 41 (51) 44 (54) 45 42

Safety Beach D (57) 40 (60) 43 (63) 41 (51) 44 (54) 45 42Rosebud D (57) 40 (60) 43 (63) 41 (51) 44 (54) 45 42

Ocean Grove D (57) 40 (60) 43 (63) 41 (51) 44 (54) 45 42Geelong E (53) 50 (64) 49 (66) 46 (67) 47 (69) 48 51

Anglesea/Aireys Inlet B (39) 28 (56) 29 (42) 30 31 33 32

Wye River C 34 35 (55) 36 37 38 39

1 The Melbourne MGV community digital television services at Mt Dandenong and South Yarra may be licensed to operate until 31 December 2013. Arrangements beyond that date are subject to future government decisions.2 | acma

1 Introduction1.1 ScopeThis report should be read in conjunction with the draft TLAP for Melbourne, the associated discussion/explanatory papers and the related planning documents. These contain the detailed transmitter specifications consistent with the parameters assumed in conducting predictions of signal levels as part of the planning process.

The legislative and regulatory background of the Melbourne TLAP is discussed in the metropolitan draft TLAP discussion paper.

The Melbourne TV1 licence area covers the greater metropolitan Melbourne area as well as Geelong. The main high-power transmission site in this area is Mt Dandenong. This report also includes Wye River, which although being located in the Regional Victoria licence area is expected to be fed with input signals from Mt Dandenong.

The digital switchover timetable has set the Melbourne TV1 licence area to switchover on 10 December 2013. Surrounding areas in the Regional Victoria TV1 licence area completed switchover on 5 May 2011.

This engineering report provides supporting engineering information to explain the choice of channels at sites to be included in the Melbourne TLAP. To provide a complete view of the constraints influencing channel block selection, the scope of this engineering report also includes sites used to provide retransmission services (both those operated by TX Australia, and those operated by councils or other community organisations).

The report also analyses the constraints affecting the sequencing of the move to final restack channels but the determination of the timing window within which the transition to final digital channels must occur, is covered in the Discussion Paper for metropolitan licence area draft TLAPs.

1.2 Channel planning principlesThe planning principles that underpin the identification of blocks and allotment of channels have been the subject of extensive consultation/discussion at the Restack Planning Advisory Group (RPAG) and then a formal public consultation. Feedback on the proposed restack objectives was broadly positive and supportive of the proposed planning objectives. In its analyses that led to the decision to incorporate the Block planning approach in its planning principles, the ACMA undertook an extensive comparative analysis of two alternative planning approaches and eventually adopted the block approach over the alternative Minimum Moves approach.

The development of the overall restack channel plan has followed a top-down approach. That is to say, high-power sites and other sites serving large populations were considered first and the most suitable channel blocks for those key sites were identified. After that, more detailed region-by-region analyses were performed to identify channel blocks for the repeater sites in each region.

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1.3 Channel block identifications for the Melbourne licence area

The identified channel block for the high-power Melbourne services was fixed as Block A by the ministerial direction to the ACMA.

Within the RPAG a collaborative process was undertaken to develop an indicative channel plan for ‘key sites’ around Australia. That process concluded that the block identifications for major surrounding regional transmitter sites around Melbourne should be: Bendigo (Block B), Latrobe Valley (Block B), Ballarat (Block C), and Goulburn Valley (Block C). Those block allocations strongly influence the block identifications of several of the repeater sites in the Melbourne licence area. Further details of the block identification and channel allotment for all sites in the Melbourne licence area are discussed in detail in section 2.

In addition, channel blocks for other lower-power sites in Regional Victoria have been identified in an earlier engineering report, which has been the subject of industry consultation, both through a formal public consultation and through informal consultation at RPAG Working Group meetings. During the process of developing channel plans for Regional Victorian sites, Melbourne licence area sites were considered and channel planning for these sites was undertaken so that the planning principles for both regional and metropolitan area sites were applied simultaneously). Notwithstanding, the engineering report for the Melbourne TV1 licence area was developed after the consultation of the Regional Victoria engineering report, and therefore in this report the blocks identified for Regional Victoria sites are presented as fixed.

Section 3 uses the proposed Block identifications, and knowledge of interference compatibility constraints to determine limitations or conditions that could apply to the sequence in which the restack is implemented.

Appendix A1 provides the ACMA’s planning principles.

Appendix A2 provides a channel chart that summarises the proposed channel allotments as well as current analog (where applicable) and digital channels at each site.

Appendix A3 provides colour-coded maps that illustrate the channel blocks identified for each transmitter site together with an indication of its expected coverage.

Appendix A4 provides a service-by-service listing of constraints on restacking each service.

1.4 ConsultationThe ACMA distributed a draft of this engineering report prior to the RPAG Working Group meeting on 30 May 2012 and discussed the channel planning proposals contained in the draft at that meeting.

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1.5 TerminologyBlock identification and channel allotmentsTo align with terminology being adopted in TLAP instruments, this report uses the terms ‘identify’ or identification’ when referring to the proposed block of channels to be used to serve a particular area. The channels of the identified channel block are specified in TLAP. The term ‘allotment’ is used in the TLAP and in this engineering report in relation to which channel is to be used by which broadcaster. Some channels will remain unallotted in TLAP and may be available for future allotment to a new service or be made available for retransmission services operated by third parties.

Call sign for ABC servicesThe ABC has traditionally been given a unique call sign for services from main sites and off-air fed translators and a generic state-based call sign for the main metropolitan service and satellite fed services. For example, the ABC service at Melbourne has the call sign ABV. This convention has not been rigorously applied over the years and this can lead to confusion. For the purposes of consistency, in this engineering report and draft TLAP documents, the call sign ABC has been used for all ABC services.

1.6 Transmitter specificationsDetailed transmitter specifications for each service at each site are included in separate planning data. The planning data will become a ‘living document’ that should quite closely reflect the actual operating conditions of all services within the planning area covered by the TLAP. It is intended that the planning data will be revised from time to time as better information, or changes to transmitter specifications, are advised to the ACMA. Generally those specifications follow existing DCP technical specifications (except for channel changes).Research background and methodology

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2 Block identification and channel allotment proposals

2.1 BackgroundThis section of the engineering report explains how the proposed channel blocks were identified for each area and describes the proposed channel allotments within each identified block. In addition to the normal consideration of avoiding or minimising predicted interference between services, channel allotments have been made in accordance with the ACMA’s planning principles unless specifically noted in the discussion in this section. The planning principles are reproduced in Appendix A1.

Selection of channel blocks and channel allotments has been done in accordance with planning principles 4 and 5 in all cases. In the selection of channel blocks the ACMA has been guided by the need to avoid interference between services and by Planning Principle 7. Discussion on the rationale for particular block selections is included on a site-by-site basis in sections 2.2 and 2.3. Similarly the channel allotments within each identified block generally follow Planning Principle 6, but individual issues are discussed in sections 2.2 and 2.3.

In addition to the site-by-site discussion in this section, the channel allocation proposals have also been summarised in a consolidated channel chart (that also shows current analog and digital channels) in Appendix A2.

2.2 High-power sites2.2.1 Melbourne (Mt Dandenong) Block AMelbourne (Mt Dandenong) is the main high-power transmission site serving the Melbourne Switchover Area. At Mt Dandenong three transmission sites may transmit digital services; however, those sites are considered to be effectively co-sited for the purpose of this report.

The identified channel block for the high-power metropolitan services in Melbourne is Block A. Proposed channel allotments for Melbourne follow Planning Principle 6 and are shown in Table 2.1.

The Melbourne MGV32 community service may be licensed to operate until 31 December 2013. Arrangements beyond that date are subject to future government decisions

2.3 Melbourne licence area repeater sites

Table 2.1 shows the proposed block identifications and channel allotments for repeater sites in the Melbourne switchover region. In addition the Wye River retransmission site has been included in this analysis as, even though it is located in the Regional Victoria TV1 licence area, it is expected that it will be off-air fed with Melbourne TV1 licence area services.

Block identifications have been made for sites listed in Table 2.1. If channels for additional sites are required in future, they should fit within the framework provided in Table 2.1.

The ACMA is aware of potential proposals for additional council funded retransmission sites at Kalorama (South) and/or Kalorama North. However, those potential sites were

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not providing operating services at the time of the restack planning and were therefore considered to be outside the scope of the restack planning activity. As noted above, should finalised, funded proposals be submitted in future they could be considered provided they can be accommodated within the channel plan framework shown below. Pending detailed engineering analysis of actual proposals it appears that Blocks B or E may be potentially available.

Table 2.1 Proposed channel allotments for the Melbourne region

Marysville

Area Served Pol

6 7 8 9 9A 10 11 12 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51

Marysville H SBS

AB

C

HSV

GTV

ATV

U

A

Healesville V SBS

AB

C

HSV

GTV

ATV

U

A

Warburton (VIC) H SBS

AB

C

HSV

GTV

ATV

U

A

MELBOURNE H HSV

SBS

G

TV

DAB

U

A

ATV

AB

C

MG

V

Monbulk V HSV

GTV

ATV

AB

C

SBS

U

A

Selby H SBS

AB

C

HSV

GTV

ATV

U

A

Ferntree Gully H SBS

H

SV

U

A

ABC

G

TV

AT

V

Upwey V SBS

AB

C

HSV

GTV

ATV

U

A

South Yarra V SBS

H

SV

U

A/M

GV

AB

C

GTV

ATV

Melbourne Inner Suburbs V SBS

H

SV

U

A

ABC

G

TV

AT

V

Safety Beach H SBS

H

SV

U

A

ABC

G

TV

AT

V

Rosebud V SBS

H

SV

U

A

ABC

G

TV

AT

V

Ocean Grove H SBS

H

SV

U

A

ABC

G

TV

AT

V

Geelong H HSV

GTV

ATV

AB

C

SBS

U

A

Anglesea/Aireys Inlet H SBS

AB

C

HSV

GTV

UA

AT

V

Wye River V SBS

AB

C

HSV

GTV

ATV

U

A

A B C D E

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2.3.1 Overview discussionDue to the interactions between Melbourne area repeaters it is not possible to identify independent channel blocks for all repeater sites. Therefore some use of Single Frequency Networks (SFNs) is essential if all broadcast sites and proposed retransmission site conversions and gap fillers are to be accommodated. Wherever possible it is highly desirable to maintain existing SFN arrangements to avoid creating new potential interference situations. Therefore the starting point for Melbourne TV1 licence area channel planning studies was:

> Safety Beach and Rosebud operating in a SFN;

> Selby, Upwey and Ferntree Gully operating in a SFN;

> Melbourne Inner Suburbs and South Yarra operating in a SFN. This is because of their geographic proximity, and to avoid inefficient spectrum use (which would likely prevent channel blocks being found for other sites in the Melbourne area).

However, as detailed planning progressed it was found necessary to break Ferntree Gully away from Selby and Upwey due to potential interference from Ballarat to Ferntree Gully. This is discussed in sections 2.3.5 and 2.3.6.

Because of their mutual interactions, and the large populations potentially covered by the Melbourne Inner Suburbs/South Yarra, Geelong and Safety Beach/Rosebud sites, Melbourne area channel planning was performed by first identifying the most suitable channel blocks for those sites.

2.3.2 Melbourne Inner Suburbs and South Yarra Block DThe Melbourne Inner Suburbs services have been planned on the basis of protection of locations where the received field strength exceeds the ‘suburban’ level and where locations receive their best signals from the (proposed) Melbourne Inner Suburbs site.

South Yarra services have been planned on the basis of protection of locations where the received field strength exceeds the ‘suburban’ level.

Melbourne Inner Suburbs and South Yarra services (operating in SFN) need to avoid Bendigo and Latrobe Valley services on Block B and Ballarat services on Block C. Healesville and Selby/Upwey services and Mt Cowley IBL (near Lorne) also need to be avoided. Therefore it is proposed that the identified channel block for Melbourne Inner Suburbs and South Yarra should be Block D.

The channel allotment for Melbourne Inner Suburbs and South Yarra should follow that for Safety Beach and Rosebud, and are explained in section 2.3.4.

The MGV South Yarra service can be accommodated on the unallotted channel (channel 42) on an interim basis until 31 December 2013.

2.3.3 Geelong Block EThe Geelong services have been planned on the basis of protection of locations where the received field strength exceeds the ‘suburban’ level.

A medium-power Geelong service transmitting 4 kW ERP has been proposed to replace the existing, much lower-power, analog services. The proposed new service has been planned to provide suburban grade signal to known poor coverage areas of Drysdale/Clifton Springs and Barwon Heads/Ocean Grove. An incidental benefit of establishing the new services with significantly increased power is that they are predicted to provide a stronger and alternative source of signals to most of Geelong, Corio and Leopold than the signals currently provided by Mt Dandenong.

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Geelong services need to avoid Latrobe Valley and Bendigo services on Block B, Ballarat, Lorne services on Block C and Melbourne Inner Suburbs/South Yarra services on Block D. Selby/Upwey, Safety Beach (national services), Ocean Grove and Wye River services also need to be avoided. Therefore it is proposed that Geelong should operate on Block E.

To optimise compatibility with surrounding Block E sites the polarisation of this service is proposed to be horizontal. This differs from the polarisation of the co-sited low-power Geelong (Newtown) analog retransmission service; however, given the high field strengths that the new Geelong service will provide within the coverage area of the Geelong (Newtown) analog service it is expected that in that area vertical antennas will provide adequate performance and should not require modification.

The proposed channel allotments for Geelong are HSV46, GTV47, ATV48, ABC49, SBS50 and UA51. This follows the channel allotment order requested by TX Australia (which will hold the licences of all these services).

2.3.4 Safety Beach and Rosebud Block DThe Safety Beach services have been planned on the basis of protection of locations where the received field strength exceeds the ‘suburban’ level and where locations receive their best signals from the Safety Beach site.

The Rosebud services have been planned on the basis of protection of locations where the received field strength exceeds the ‘suburban’ level.

Safety Beach and Rosebud currently operate in a SFN, and this arrangement is proposed to continue. It should be noted that at Arthurs Seat (the Safety Beach transmitter site) commercial services are transmitted using a panel antenna pointing north-east (currently operating at 25 W maximum ERP), while national services are transmitted using a slot antenna pointing south-west (nominally 400 W maximum ERP).

Safety Beach and Rosebud services need to avoid Bendigo and Latrobe Valley services on Block B, Ballarat and Lorne services on Block C, and Geelong, Colac, Mt Cowley IBL and Tanybryn IBL (near Apollo Bay) services on Block E. Anglesea/Aireys Inlet, Selby/Upwey, Warburton and Healesville services also need to be avoided. Additionally, Ocean Grove services are only compatible with Safety Beach national services if operated in an SFN.

Therefore, only Block D is available. In order to avoid co-channel interference Safety Beach and Rosebud should be operated in an SFN with Melbourne Inner Suburbs and South Yarra.

The proposed channel allotments for Safety Beach and Rosebud should be aligned with those of Melbourne Inner Suburbs/South Yarra to allow SFN operation.

Two competing considerations were weighed in determining the channel allotment order at Safety Beach (and consequentially at other Melbourne Block D SFN sites).> Firstly it is desirable to maintain the currently operating HSV41 and GTV44 digital

services at Ferntree Gully. But if Ferntree Gully is to be incorporated in an SFN with other sites all sites will need to adopt the same channel allotment order.

> Against this there is a concern that differences in transmit antenna HRP for national and commercial services at Safety Beach may lead to unacceptable adjacent-channel interference where signals from an adjacent channel national service, which may be received at a much higher field strength than a wanted commercial signal. However, detailed adjacent channel interference modelling found that this adjacent channel interference risk is small or negligible.

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It was concluded that the first consideration is the more important and that therefore the proposed channel allotment order at Safety Beach (and all other Melbourne Block D SFN sites) should be: SBS40, HSV41, UA42, ABC43, GTV44 and TVQ45.

2.3.5 Selby and Upwey Block CThe Selby and Upwey services have been planned on the basis of protection of locations where the received field strength exceeds the ‘suburban’ level.

As mentioned in section 2.3.1, initial channel planning for Selby, Upwey and Ferntree Gully was based on maintaining the currently operating SFN arrangement. Under this scenario the Selby/Upwey/ Ferntree Gully SFN needs to avoid co-channel operation with Latrobe Valley services on Block B, Ballarat on Block C, Melbourne Inner Suburbs/South Yarra and Safety Beach services on Block D and Geelong services and the Mt Cowley IBL on Block E. This would mean that no block was available. Further analysis found; however, that Selby and Upwey are compatible with Ballarat, while parts of the Ferntree Gully coverage on the slope immediately east of the train station is predicted to receive unacceptable interference from Ballarat. Therefore Ferntree Gully has been removed from the SFN with Selby and Upwey (see section 2.3.6).

The proposed channel allotments for Selby and Upwey follow Planning Principle 6 and are SBS34, ABC35, HSV36, GTV37, ATV38 and UA39.

2.3.6 Ferntree Gully Block DThe Ferntree Gully services have been planned on the basis of protection of locations where the received field strength exceeds the ‘suburban’ level.

Ferntree Gully currently operates in an SFN with Selby and Upwey. As discussed above, Selby and Upwey services are proposed to operate in Block C co-channel with Ballarat services; however, this is predicted to cause unacceptable interference to Ferntree Gully services under tropospheric propagation conditions. Therefore the current SFN arrangement involving Selby, Upwey and Ferntree Gully will be reconfigured to place Ferntree Gully on a different block.

Ferntree Gully needs to avoid co-channel operation with Bendigo services on Block B, Ballarat and Lorne services on Block C. (But it is noted that the predicted interference from Ballarat into the Ferntree Gully coverage was effectively restricted to the slope immediately east of the Ferntree Gully train station). Co-channel operation with Safety Beach, Rosebud, Ocean Grove, Melbourne Inner Suburbs and South Yarra on Block D or Geelong on Block E, respectively, is also predicted to cause interference to the Ferntree Gully target area. Therefore, Ferntree Gully needs to be incorporated into an SFN, either with Safety Beach, Rosebud, Ocean Grove, Melbourne Inner Suburbs and South Yarra, or with Geelong. Metropolitan commercial broadcasters have indicated that they wish to avoid introducing SFN equipment at the Geelong transmitter site. Therefore, it is proposed that Ferntree Gully be incorporated into the Safety Beach, Rosebud, Ocean Grove, Melbourne Inner Suburbs and South Yarra SFN on Block D.

The proposed channel allotments for Ferntree Gully follow Planning Principle 6, and maintain the currently operating Ferntree Gully HSV41 and GTV44 digital services which have been aligned those and other services with those of Melbourne Inner Suburbs/South Yarra and Safety Beach/Rosebud/Ocean Grove since all of these sites need to operate in an SFN.

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Ocean Grove Block DThe Ocean Grove services have been planned on the basis of protection of locations where the received field strength exceeds the ‘suburban’ level.

Planning of the proposed Ocean Grove services has been based on an ERP of 10 W. At this ERP level, Ocean Grove services need to avoid co-channel operation with Latrobe Valley services in Block B, Ballarat and Lorne services in Block C, Safety Beach (national services only) in Block D and Geelong services in Block E. No clear block is available, so Ocean Grove must be incorporated into a SFN with one or more other Melbourne repeater sites.

TX Australia and commercial broadcasters advised that it would be more economical to incorporate Ocean Grove (national services only) into an existing SFN involving Safety Beach and Rosebud rather than to establish a new Geelong/Ocean Grove SFN. Therefore it is proposed that the channel block identified for use by Ocean Grove should be Block D.

The proposed channel allotments for Ocean Grove follow Planning Principle 6 and have been aligned with those of Melbourne Inner Suburbs/South Yarra and Safety Beach/Rosebud and Ferntree Gully since all of these sites need to operate in an SFN.

2.3.7 Anglesea/Aireys Inlet Block BThe Anglesea/Aireys Inlet services have been planned on the basis of protection of locations where the received field strength exceeds the ‘suburban’ level.

Anglesea/Aireys Inlet services need to avoid Lorne and Ballarat services in Block C, Safety Beach and Selby services in Block D and desirably Mt Cowley IBL services in Block E. Anglesea/Aireys Inlet services should also not be co-channelled with Wye River services. Therefore, it is proposed that the identified channel block for Anglesea/Aireys Inlet should be Block B, co-channel with Latrobe Valley and Bendigo.

The proposed channel allotments for Anglesea/Aireys Inlet place the UA channel on channel 32 to avoid possible constraints due to the Melbourne MGV32 service, in accordance with Planning Principle 6. Therefore the proposed channel allotments at Anglesea/Aireys Inlet are SBS28, ABC29, HSV30, GTV31, UA32 and ATV33.

2.3.8 Warburton Block CThe Warburton (VIC) services have been planned on the basis of protection of locations where the received field strength exceeds the ‘suburban’ level.

Warburton (VIC) services should desirably avoid co-channel operation with Bendigo and Latrobe Valley services on Block B, Safety Beach national services on Block D and Geelong services on Block E. Therefore, it is proposed that the identified channel block for Warburton (VIC) should be Block C.

The proposed channel allotments for Warburton follow Planning Principle 6 and are SBS34, ABC35, HSV36, GTV37, ATV38 and UA39.

2.3.9 Monbulk Block EThe Monbulk services have been planned on the basis of protection of locations where the received field strength exceeds the ‘suburban’ level.

Monbulk needs to avoid co-channel operation with Latrobe Valley in Block B and Selby and Healesville services in Block C. Co-channel operation with Geelong (Block E) and Trafalgar/Yarragon on Block D is considered to be acceptable. So either Block D or E could be used. It is proposed that the identified channel block for Monbulk should be

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Block E, as this is closer to currently operating analog channels and is expected to better match the frequency range specification of the current UD style transmitting antenna.

The proposed channel allotments for Monbulk are HSV46, GTV47, ATV48, ABC49, SBS50 and UA51. This follows the channel allotment order requested by TX Australia (which will hold the licences of all these services).

2.3.10 Healesville Block CThe Healesville services have been planned on the basis of protection of locations where the received field strength exceeds the ‘suburban’ level.

Healesville services need to avoid Melbourne Inner Suburbs/South Yarra and Safety Beach services (both national and commercial) on Block D. It is also desirable to avoid Latrobe Valley services in Block B and Monbulk services in Block E. Therefore, it is proposed that the identified channel block for Healesville should be Block C. No interference is predicted to suburban grade signal due to co-channel operation between Healesville, Warburton (VIC) and Selby/Upwey.

Note: Studies indicate that some areas west of Woori Yallock may suffer co-channel interference within parts of the Healesville or Warburton rural field strength coverage contours. Although this could be resolved by operating the sites as an SFN, it is noted that viewers in these areas are also expected to have an alternative coverage option from Mt Dandenong.

The proposed channel allotments for Healesville follow Planning Principle 6 and are SBS34, ABC35, HSV36, GTV37, ATV38 and UA39.

2.3.11 Marysville Block CMarysville should avoid co-channel operation with Alexandra services in Block E. In addition, Block B should be avoided due to the probability of viewers not having Band-IV-capable receive antennas. Therefore, Block C is proposed so that the current co-channel arrangement with Warburton is maintained (though co-channel interference between these sites is not considered to be a concern).

The proposed channel allotments for Marysville follow Planning Principle 6 and are SBS34, ABC35, HSV36, GTV37, ATV38 and UA39.

2.3.12 Wye River Block CWhile Wye River is in Regional Victoria licence area, it is expected that digital retransmission services at Wye River would be fed off-air from Melbourne and operate as a Section 212 out-of-area retransmission as do the current analog retransmission services. The intended coverage area of Wye River comprises those parts of the Wye River township where the terrain slope and tree cover does not allow reliable reception of direct-to-home satellite television broadcasting services.

Wye River services need to avoid co-channel operation with Ocean Grove and Rosebud services in Block D and Geelong services in Block E. If practical they should also avoid co-channel operation with Latrobe Valley and Anglesea/Aireys Inlet on Block B. Therefore, it is proposed that the identified channel block for Wye River should be Block C.

The proposed channel allotments for Wye River follow Planning Principle 6 and are SBS34, ABC35, HSV36, GTV37, ATV38 and UA39.

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3 Implementation/sequencing considerations

This section of the report introduces the concept of TLAP timing windows and discusses implementation sequencing constraints that may need to be captured as events or circumstances in the draft TLAP or as licence conditions. The determination of restack ‘timing windows’ is not covered in this report. It is discussed separately in the Discussion Paper for metropolitan licence area draft TLAPs that is being released with this engineering report.

3.1 TLAP timing windowsThe TLAP instrument for Melbourne will specify the period for which each channel is allotted. For a service that must restack, the TLAP would show two entries - one for the current channel allotment and a second for the final (post-restack) channel allotment. By overlapping the periods during which the current and final (or post-restack) channels are allotted, a ‘timing window’ is created within which broadcasters can schedule the actual date for the restack of each site. For services not restacking, only one channel allotment is shown in the TLAP because the pre- and post-restack channels will be the same.

The timing window concept is being used as it is not practical to define precise restack dates in the TLAP. This is because any slippage due to equipment delivery or delays due to weather events, or opportunistic advancement of some work when other work is delayed, would require the TLAP to be varied. Broadcasters and the Program Implementation Manager will need to make adequate contingency allowances in their project planning to ensure that any applicable planning permits are obtained, and site works, equipment deliveries and the actual restack for each site occurs before the end of the timing window.

Additionally, the restack at each site will need to be coordinated between broadcasters to avoid (or minimise) any need for viewers to retune their television(s) multiple times during a restack timing window.

3.2 Constraints on the restacking of sites2

An analysis showing which sites need to be restacked or switched off before other sites can be restacked has been performed. The results of that analysis are summarised in Table A4.1 in Appendix A4, where current constraints (if any) are shown for each service at each site.

That analysis found that several categories of sites will not impose constraints on the timing and sequencing of the restack. Of the 16 sites3 considered in this report, 3 sites (Healesville, Marysville and Warburton) can operate on final post-restack channels at any time within the restack timing window for the Melbourne licence area. These are summarised in Table 3.1.

2 The analysis in this section does not include constraints on the use of the unallotted channel. It has been assumed that the unallotted channel will not generally be used before the restack has been completed.3 Broadcaster sites and sites providing retransmission services (both those operated by TX Australia, and those operated by councils or other community organisations).

acma | 13

Table 3.1: Sites with services not constrained by currently operating ‘pre-restack’ services

Category Area(s) servedSites that can be restacked immediately

Sites at which all services are operating (or will commence) on final channels

Healesville

Sites at which there are no constraints preventing restacking to final channels

Marysville, Warburton

Additionally, a further 13 sites are constrained by other Melbourne or surrounding Regional Victoria licence area services. (These are listed in Tables 3.2 and 3.3). In most cases the constraints are a combination of Regional Victoria and Melbourne licence area services. At only 2 of the 13 sites was the constraint only due to Melbourne licence area services.

Table 3.2: Sites with services that are only constrained by other Melbourne licence area services

Area served Constraint (col. 2 digital sites must restack before col.1 site)

Melbourne Analog: Melbourne HSV7Monbulk Selby

Table 3.3: Sites with services that are constrained by Regional Victoria or Regional Victoria and Melbourne licence area services

Area served Constraint (col. 2 digital sites must restack before col.1 site)

Anglesea/Aireys InletMelbourneAnalog: Melbourne

Ferntree GullyBallarat, Upwey, SelbyAnalog: Upwey

GeelongBallarat, Upwey, Selby, Ferntree Gully, BendigoAnalog: Upwey, Safety Beach, South Yarra

Melbourne Inner Suburbs

Ballarat, Selby, UpweyAnalog: Upwey

Ocean Grove BallaratRosebud Ballarat

Safety BeachBallarat, Selby, UpweyAnalog: Upwey

Selby Latrobe Valley VTV36

South YarraBallarat, Selby, UpweyAnalog: Upwey

Upwey Latrobe Valley VTV36

Wye River Latrobe Valley VTV36

14 | acma

Appendix A1—Planning principlesNote: the wording of principles below has been adjusted to align with the terminology adopted for TLAPs.

Principle 1: Replan digital television services to use VHF channels 6–12 and UHF channels 28–51.

Principle 2: Create a digital radio sub-band, comprising VHF television channels 9 and 9A, that is clear of digital television in metropolitan and regional licence areas. Where practicable, also avoid planning new services on these channels in remote licence areas.

Principle 3: Plan for six digital channels at each transmission site, except fori)  licence area overlaps where two sets of three commercial services will require channels (a total of nine channels)ii)  where broadcasters operate from different sites but cover the same area.

Principles 4–6 define the essential elements of the block planning approach.

Principle 4: Plan channels so that viewers in metropolitan and regional licence areas can receive all services using a single band antenna (i.e., plan all channels in either the VHF or UHF band). Consider the benefit of single band operation in other areas on a case-by-case basis. The current polarisation of the existing transmissions in a particular band at each transmission site is to be maintained.

Principle 5: Plan all six services on channels within defined blocks of channels as follows:

Block A: 6, 7, 8, 10, 11 and 12*Block B: 28, 29, 30, 31, 32 and 33Block C: 34, 35, 36, 37, 38 and 39Block D: 40, 41, 42, 43, 44 and 45Block E: 46, 47, 48, 49, 50, and 51.* Channels 9 and 9A may be used for digital TV in some remote areas.

Principle 6: Allot channels within a block as follows:

VHF: Existing VHF services to retain current channels unless they have to move to clear channels 9 and 9A under principle 2. New or changed channel allotments do not need to follow any particular order, except in all metropolitan areas where SBS should move to channel 7. Where it is possible without moving existing services, channel 10 should be the unallotted channel to align with the metropolitan area unallotted channel.

UHF: Channel allotments should be made after considering and balancing a number of objectives including: avoiding off-air input issues (adjacent channel and N+5) avoiding changes to existing services within the block using the unallotted channel to remove restack timing constraints and manage

band edge interference potential.

If none of the above issues apply, UHF channels should be allotted in the following order: SBS, ABC, Seven (or affiliate), Nine (or affiliate), Ten (or affiliate), unallotted.

Principle 7: In selecting the channel block for a transmission site:

acma | 15

Consider the channels used by existing digital services and any information available on the operating frequency range of broadcaster transmission equipment.

Avoid use of a block outside the likely bandwidth of viewer antennas. In particular, avoid Block B where there is no current or past use of UHF Band IV channels. Where this cannot be avoided, minimise the total population affected.

Wherever sites utilise UHF channel blocks, attempt to place high-power services on lower UHF channel blocks.

Principle 8: Break up wide area single frequency networks (SFNs) known to have associated reception problems and minimise use of new SFNs where possible.

Principle 9: Plan on the basis of broadcasters using the DVB-T standard with transmission parameters of 8k, 64QAM, 2/3 forward error correction (FEC) and 1/16 guard interval.The co-channel protection ratio used for planning will be: 20 dB

The minimum median field strengths used for planning will be:

Minimum median field strengths for digital television planning (dBµV/m)

VHF (Block A)(174–230 MHz)

UHF (Blocks B and C)(526–610 MHz)

UHF (Blocks D and E)(610–694 MHz)

Rural Suburban Urban Rural Suburban Urban Rural Suburban Urban

Minimum median field strength (dBuV/m)

44 57 66 50 63 71 54 67 74

Consistent with the reconfirmation of the existing technical planning parameters, the assumed transmission parameters include an FEC of 2/3. Also consistent with the reconfirmation of the current minimum median field strengths and 2/3 FEC, a co-channel protection ratio of 20 dB will also continue to be used.

However, recognising the proposal to break up wide area SFNs in principle 8, a 1/16 guard interval has been adopted.

Principle 10: Equalise transmissions across all broadcasters as far as practicable through planning on the basis of equal ERP levels, identical antenna patterns, closely sited transmitters and all broadcasters having the same SFN arrangement.

Principle 11: Determine the timing constraints on channel availability and specify a minimum window of six months, where practicable, when both the current digital and the final digital channels are available. When all sites and timing windows are considered together, they should result in the digital dividend channels (52–69) being cleared as soon as practicable, and by the end of 2014 at the latest.

16 | acma

Appendix A2—Proposed channel planMelbourne licence area sites (plus Wye River)

Area Served Pol

6 7 8 9 9A 10 11 12 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69

Marysville P H SBS

AB

C

HSV

GTV

ATV

U

A

Marysville C H ABC

HSV

GTV

G

TV ATV

ATV

SBS

SBS

ABC

HSV

Healesville P V SBS

AB

C

HSV

GTV

ATV

U

A

Healesville C V SBS

AB

C

HSV

G

TV

ATV

Warburton (VIC) P H SB

S

ABC

H

SV

G

TV

AT

V

UA

Warburton (VIC) C H HSV

GTV

G

TV ATV

ATV

SBS

SBS

ABC

ABC

HSV

MELBOURNE P H HSV

SBS

G

TV

DAB

U

A

ATV

AB

C

MG

V

MELBOURNE C H HSV

H

SVG

TV

GTV

DAB

ATV

ATV

ABC

SBS

SBS

MG

V

Monbulk P V HSV

GTV

ATV

AB

C

SBS

U

A

Monbulk C V HSV

ATV

AB

C

GTV

SB

S

Selby P H SBS

AB

C

HSV

GTV

ATV

U

A

Selby C H HSV

GTV

ABC

SBS

ATV

ABC

HSV

GTV AT

V

SBS

Ferntree Gully P H SBS

H

SV

U

A

ABC

G

TV

AT

V

Ferntree Gully C H HSV

GTV

ABC

SBS

ATV

ABC

HSV

GTV AT

V

SBS

Upwey P V SBS

AB

C

HSV

GTV

ATV

U

A

Upwey C V ABC

HSV

H

SV

GTV

G

TV ABC

ATV

SBS

SBS

ATV

South Yarra P V SBS

H

SV

U

A/M

GV

ABC

G

TV

AT

V

South Yarra C V HSV

GTV

G

TV ATV

ATV

SBS

SBS

ABC

ABC

HSV

MG

V

Melbourne Inner Suburbs P V SBS

H

SV

U

A

ABC

G

TV

AT

V

Melbourne Inner Suburbs C V GTV

ATV

SBS

ABC

HSV

Safety Beach P H SBS

H

SV

U

A

ABC

G

TV

AT

V

Safety Beach C H HSV

GTV

G

TV ATV

ATV

SBS

SBS

ABC

ABC

HSV

Rosebud P V SBS

H

SV

U

A

ABC

G

TV

AT

V

Rosebud C V GTV

ATV

ABC

SBS

HSV AB

C

GTV

HSV

ATV

SBS

Ocean Grove P H SBS

H

SV

U

A

ABC

G

TV

AT

V

Ocean Grove C H GTV

ATV

SBS

ABC

HSV

Geelong P H HSV

GTV

ATV

AB

C

SBS

U

A

Geelong C H SBS

ABC

HSV

GTV AB

C

ATV

HSV

G

TV

SBS

ATV

Anglesea/Aireys Inlet P H SBS

AB

C

HSV

GTV

UA

AT

V

Anglesea/Aireys Inlet C H GTV

ATV

SBS

HSV

ABC

HSV

GTV AT

V

SBS

Wye River P V SBS

AB

C

HSV

GTV

ATV

U

A

Wye River C V SBS

AB

C

GTV

AT

V

ABC

HSV

GTV AT

V

SBS

A B C D E

acma | 17

Sites in neighbouring licence areasCANBERRA

Area Served Pol

6 7 8 9 9A 10 11 12 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69

GOULBURN VALLEY P H

AMV

VT

V

SBS

AB

C

GLV

UA

GOULBURN VALLEY C VH VTV

SBS

ABC

GLV

AMV

Broadford P V SBS

AB

C

AMV

VT

V

BCV

U

A

Broadford C V VTV

AMV

BCV

SBS

ABC

Alexandra Environs P V ABC

SB

S

Alexandra Environs C V SBS

ABC

Alexandra P V SBS

AB

C

AMV

VT

V

GLV

UA

Alexandra C V ABC

GLV

VTV

AMV

SBS

Newborough P H SBS

AB

C

AMV

VT

V

GLV

UA

Newborough C H SBS

AMV

VTV

GLV

ABC

LATROBE VALLEY P H GLV

ABC

SB

S

VTV

U

A

AMV

LATROBE VALLEY C H SBS

AMV

VTV

GLV

ABC

BENDIGO P H SBS

AB

C

VTV

AM

V

UA

BC

V

BENDIGO C H SBS

AMV

ABC

BCV

VTV

BALLARAT P H SBS

AB

C

AMV

VT

V

BCV

U

A

BALLARAT C H VTV

BCV

ABC

SBS

AMV

Colac P V SBS

AB

C

VTV

U

A

BCV

AM

V

Colac C V VTV

BCV

AMV

ABC

SBS

Lorne P H SBS

AB

C

AMV

VT

V

BCV

U

A

Lorne C H ABC

VTV

BCV

AMV

SBS

Mt Cowley IBL P V SBS

AM

V

VTV

BC

V

Mt Cowley IBL C V VTV

BCV

AMV

SBS

Tanybryn IBL P V SBS

AMV

VT

V

BCV

Tanybryn IBL C V VTV

BCV

AMV

SBS

A B C D E

Current or planned digital service

Current analog service

Currently operating digital radio (DAB) services

Proposed restacked digital channel allotment

Currently operating analog that will be converted to digital via a hot-swap.

Interim digital channel

18 | acma

Appendix A3—MapsNote well: The following maps provide a general indication of the areas that may be covered by each transmitter, but several important disclaimers should be noted:1. the presentation does not take account of predicted interference between

services;2. the presentation has used the CRCpredict diffraction-based coverage prediction

model. The predictions use best available information about nominal ERP levels and antenna patterns;

3. the presentation does not include an allowance for clutter losses;4. For the Safety Beach service the wider coverage national service pattern has

been assumed;5. Figure A3.1 presents a simple ‘max server’ presentation which, in the case of

locations in areas of overlap between two coverages, ascribes coverage to the transmitter that provides the highest ‘Band V equivalent’ field strength at the point in question. (Note: This max server presentation is based purely on field strength comparisons it does not consider whether the received field strengths are interference-free, nor does it consider viewer preferences for one site over another).

6. Figure A3.2 provides an indication of potential ‘suburban’ coverage contour of each of the Melbourne area repeater sites with the Mt Dandenong services excluded.

These maps SHOULD NOT BE USED to provide advice about the coverage of particular transmitters. For that purpose readers should refer to the MySwitch web site at: http://myswitch.digitalready.gov.au/

acma | 19

Figure A3.1 Melbourne licence area (all services)

20 | acma

Figure A3.2 Melbourne repeater sites

acma | 21

Appendix A4—Service-by-service constraint listTable A4.1 shows analog and digital services that would constrain a service at a nominated site from moving to its final restack channel.

Note: Some services do not need to be restacked (i.e., they already operate on their final, post-restack channels) and some other services do not have any constraints and could be restacked immediately.

Table A4.1: Constraints on restack of Melbourne TV1 licence area services

Area served Callsign

Current channel

Final channel Constraint or comment

Anglesea/Aireys Inlet SBS 39 28 Must restack after analog Melbourne SBS28 switch-off.

Anglesea/Aireys Inlet ABC 56 29 Must restack after digital Melbourne SBS29 restack.

Anglesea/Aireys Inlet HSV 42 30No constraints however should be restacked after digital Latrobe Valley SBS30 restack to maintain pairing with Latrobe Valley.

Anglesea/Aireys Inlet GTV 31 31 No channel change required at restack.

Anglesea/Aireys Inlet UA 32 Constrained by digital Melbourne MGV32.

Anglesea/Aireys Inlet ATV 33 33 No channel change required at restack.

Ferntree Gully SBS 50 40 Must restack after digital Ballarat BCV40 restack.

Ferntree Gully HSV 41 41 No channel change required at restack.

Ferntree Gully UA 42 May not commence until after analog Upwey HSV42 switch-off.

Ferntree Gully ABC 47 43 Must restack after digital Ballarat SBS43 restack.

Ferntree Gully GTV 44 44 No channel change required at restack.

Ferntree Gully ATV 54 45 Must restack after analog Upwey GTV45 switch-off.

Geelong HSV 66 46 Must restack after digital Ballarat AMV46 restack.

Geelong GTV 67 47 Must restack after digital Upwey ABC47, Selby ABC47, Ferntree Gully ABC47 restack.

Geelong ATV 69 48Must restack after digital Bendigo ABC48 restack and after analog Upwey ATV48 switch-off.

Geelong ABC 64 49 Must restack after analog Safety Beach HSV49, South Yarra HSV49 switch-off.

Geelong SBS 53 50 Must restack after digital Upwey SBS50, Selby SBS50, Ferntree Gully SBS50 restack.

Geelong UA 51

May not commence before digital Ocean Grove GTV51, Safety Beach GTV51, Rosebud GTV51, Bendigo BCV51, South Yarra GTV51, Melbourne Inner Suburbs GTV51 restack and before analog Upwey SBS51 switch-off.

Healesville SBS 34 34 No channel change required at restack.

22 | acma

Healesville ABC 35 35 No channel change required at restack.

Healesville HSV 36 36 No channel change required at restack.

Healesville GTV 37 37 No channel change required at restack.

Healesville ATV 38 38 No channel change required at restack.

Healesville UA 39 No constraints.

Marysville SBS 57 34 No constraints.

Marysville ABC 60 35 No constraints.

Marysville HSV 63 36 No constraints.

Marysville GTV 51 37 No constraints.

Marysville ATV 54 38 No constraints.

Marysville UA 39 No constraints.

Melbourne HSV 6 6 No channel change required at restack.

Melbourne SBS 29 7 Must restack after analog Melbourne HSV7 switch-off.

Melbourne GTV 8 8 No channel change required at restack.

Melbourne UA 10 May not commence before analog Melbourne ATV10 switch-off.

Melbourne ATV 11 11 No channel change required at restack.

Melbourne ABC 12 12 No channel change required at restack.

Melbourne MGV 32 324 No constraints.

Melbourne Inner Suburbs SBS 57 40 Must restack after digital Ballarat BCV40 restack.

Melbourne Inner Suburbs HSV 63 41 Must restack after digital Selby HSV41, Ballarat ABC41, Upwey HSV41 restack.

Melbourne Inner Suburbs UA 42May not commence before digital Latrobe Valley ABC42 restack and before analog Upwey HSV42 switch-off.

Melbourne Inner Suburbs ABC 60 43 Must restack after digital Ballarat SBS43 restack.

Melbourne Inner Suburbs GTV 51 44 Must restack after digital Selby GTV44, Upwey GTV44 restack.

Melbourne Inner Suburbs ATV 54 45 Must restack after analog Upwey GTV45 switch-off.

Monbulk HSV 46 46 No channel change required at restack.

Monbulk GTV 52 47 Must restack after digital Selby ABC47.

Monbulk ATV 48 48 No channel change required at restack.

Monbulk ABC 49 49 No channel change required at restack.

Monbulk SBS 53 50 Must restack after digital Selby SBS50.

Monbulk UA 51 No constraints.

Ocean Grove SBS 57 40 Must restack after digital Ballarat BCV40 restack.

Ocean Grove HSV 63 41 Must restack after digital Ballarat ABC41 restack.

4 Interim channel

acma | 23

Ocean Grove UA 42 May not commence before digital Latrobe Valley ABC42 restack.

Ocean Grove ABC 60 43 Must restack after digital Ballarat SBS43 restack.

Ocean Grove GTV 51 44 No constraints.

Ocean Grove ATV 54 45 No constraints.

Rosebud SBS 57 40 Must restack after digital Ballarat BCV40 restack.

Rosebud HSV 63 41 Must restack after digital Ballarat ABC41 restack.

Rosebud UA 42May not commence before digital Latrobe Valley ABC42, Anglesea/Aireys Inlet HSV42 restack.

Rosebud ABC 60 43 Must restack after digital Ballarat SBS43 restack.

Rosebud GTV 51 44 No constraints.

Rosebud ATV 54 45 No constraints.

Safety Beach SBS 57 40 Must restack after digital Ballarat BCV40 restack.

Safety Beach HSV 63 41 Must restack after digital Ballarat ABC41, Selby HSV41, Upwey HSV41 restack.

Safety Beach UA 42

May not commence before digital Latrobe Valley ABC42, Anglesea/Aireys Inlet HSV42 restack and before analog Upwey HSV42 switch-off.

Safety Beach ABC 60 43 Must restack after digital Ballarat SBS43 restack.

Safety Beach GTV 51 44 Must restack after digital Selby GTV44, Upwey GTV44 restack.

Safety Beach ATV 54 45 Must restack after analog Upwey GTV45 switch-off.

Selby SBS 50 34 No constraints.

Selby ABC 47 35 No constraints.

Selby HSV 41 36 Must restack after digital Latrobe Valley VTV36 restack.

Selby GTV 44 37 No constraints.

Selby ATV 54 38 No constraints.

Selby UA 39

May not commence before digital Latrobe Valley GLV39, Anglesea/Aireys Inlet SBS39 restack and before analog Upwey ABC39 switch-off.

South Yarra SBS 57 40 Must restack after digital Ballarat BCV40 restack.

South Yarra HSV 63 41 Must restack after digital Selby HSV41, Ballarat ABC41, Upwey HSV41 restack.

South Yarra MGV/UA 425

May not commence before analog Upwey HSV42 switch-off. Potentially interference limited by digital Latrobe Valley ABC42

South Yarra ABC 60 43 Must restack after digital Ballarat SBS43 restack.

South Yarra GTV 51 44 Must restack after digital Selby GTV44, Upwey GTV44 restack.

5 Interim channel

24 | acma

South Yarra ATV 54 45 Must restack after analog Upwey GTV45 switch-off.

Upwey SBS 50 34 No constraints.

Upwey ABC 47 35 No constraints.

Upwey HSV 41 36 Must restack after digital Latrobe Valley VTV36 restack.

Upwey GTV 44 37 No constraints.

Upwey ATV 54 38 No constraints.

Upwey UA 39May not commence before digital Latrobe Valley GLV39 restack and before analog Upwey ABC39 switch-off.

Warburton (VIC) SBS 57 34 No constraints.

Warburton (VIC) ABC 60 35 No constraints.

Warburton (VIC) HSV 63 36 No constraints.

Warburton (VIC) GTV 51 37 No constraints.

Warburton (VIC) ATV 54 38 No constraints.

Warburton (VIC) UA 39 No constraints.

Wye River SBS 34 34 No channel change required at restack.

Wye River ABC 35 35 No channel change required at restack.

Wye River HSV 55 36 Must restack after digital Latrobe Valley VTV36.

Wye River GTV 37 37 No channel change required at restack.

Wye River ATV 38 38 No channel change required at restack.

Wye River UA 39May not commence before digital Latrobe Valley GLV39, Anglesea/Aireys Inlet SBS39 restack.

acma | 25