Digital TV Technical Discussion

Ahh memories! The transmit antenna is the 2 white panels back to back at the top of the pole, the Bald Knob input is the white panel a couple of meters below the top and who knows what the Wisi UHF antenna at the bottom does?? Interestingly before the Restack when Bald Knob and Tamborine used the same frequencies, Peregian used to get input interference from Mt Tamborine. The spacious equipment shelter is visible at the base of the pole.

Having a high gain antenna and perhaps a low noise pre-amp on retransmission inputs is often not a good combination particularly when ducting occurs - too much sensitivity often gives a ducted signal the opportunity to interfere with the primary input.

These sites are not true translators - the input antenna connects via a filter to either a Rohde&Schwartz or Tandberg pro receiver then the demodulated ASI is fed to a NEC transmitter then up the pole via a combiner.

Another micro powered caravan park translator station at Coolum Beach. Same specs as the Maroochydore Beach translator. Signal input most likely from either Bald Knob or Dulong.


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DXed both the Brisbane South East and Mt Coot-tha signals tonight from my north facing Gold Coast apartment. Mt Coot-tha was the easier of the two to get.

The apartment is shielded to the south, as other times when I’ve stayed on the Coast, it’s usually Lismore that is received instead of Brisbane SE (since they both use the Block B UHF channels 29-33).

Are you in Surfers Paradise?

I think there it would be the Mt Nardi and Mt Cootha channels fighting, as Surfers Paradise would be in the middle of those areas. However in Coolangatta (where I stayed in August) it is very easy to get Lismore channels and hard to get Mt Cootha as to my north the Gold Coast channels block the Mt Cootha signals, but to my south the Lismore channels arent blocked.

My hotel mainly got the Gold Coast channels in my apartment (no Lismore or Brisbane ones, so I used my set top box to get the former) however in the gym it got both Lismore and Gold Coast channels. Basically it was like this at the gym:

1, 10-19: 10 Gold Coast channels
2, 20-29 ABC Lismore channels
3, 30-39 SBS Lismore channels
5, 50-59 WIN Lismore channels
6, 60-69 Seven Lismore channels
7, 70-79 Seven Gold Coast channels (not NEN)
8, 80-89 NBN Lismore channels
9, 90-99 Nine Gold Coast channels

800+ ABC, SBS, WIN, NBN, Seven Regional Gold Coast channels

If I turned my portable antenna ears sideways, it got the Lismore channels, but when a family member turned them upwards “to get a better signal” the Lismore channels suddenly disappeared and I turned them back to the Lismore ones. I didn’t have the time to cap any Gold Coast stuff, so that is why you see Seven News Coast/NBN News North Coast videos instead of Nine News Gold Coast/NBN News Gold Coast/Seven News Gold Coast ones.

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I am up at Southport, its possible to get both Lismore and Brisbane if you have line of sight to both as they are on separate frequencies.

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Does anyone know if the Brisbane south-east transmitter at Darlington Range a retransmission of 7 Brisbane or 7 Gold Coast? As the location of the transmitter is located on the northern Gold Coast

According to the ACMA TV planning data spreadsheet, Darlington Range is fed off air directly from Mt Coot-tha.

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It is Brisbane 7.

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I received these when I was on the Gold Coast last week and the LCNs are labelled ‘7 Brisbane’, ‘Channel 9 Brisbane’ etc (UHF 30-32).

Speaking of channel 9, I set up my own digital TV transmitter on that channel using the Channel Master ATSC HD modulator.


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The color bars are coming from a YouTube video on my NVIDIA Shield TV.

Some channel changes coming up planned on November 30th at one of the metro networks, in a starting move to what you guys have talking about/wanting for ages, not going to say much now, you’ll have to wait & see, then after these initial changes I’ll elaborate a bit further on future plans.

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MPEG4 HD baby. I’m putting bets on Nine. Similar date to the last time they refreshed their lineup in 2015. Graphics refresh too?

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Nine in MPEG4 only is my guess too… IF it is true, hopefully then all of 9Go, 9Life and 9Rush will be HD too.

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I think it’s far more likely that the multis will all go MPEG4 HD only with the main channel still having an MPEG2 SD simulcast.

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I would argue that it’s time MPEG2 is dropped for good. It’s been a good 7 years since MPEG4 channels were first introduced. It’s got to happen eventually. MPEG2 is a bandwidth hog.

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My guess was just a channel flipping their main channel over to the single digit LCN.

10 putting 10HD on 10 would be my main guess given how odd their current allocation is, so they’d benefit the most from a reshuffle.

Though if it’s not Ten, then I suppose you’d also see the HD multichannels flip, so 7MateHD on 73 or 9GemHD on 93, etc. That then eases phasing out the SD simulcasts, especially for Seven as I believe you’ll see Mate SD removed for Bravo.

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What about a 4k channel?

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You’d need far too much bandwidth for that… at least two or even three multi channels would have to be axed to make room.

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Seven should do something before the introduction of 7Bravo in January. So possibly implement the 7 regional solution where 7Tow and 7Mate are HD only with no SD option.

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