UHF channlels in Auckland

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20100

21 posts

Geek

#305882 11-Jun-2023 12:51

Our Tivo died and have been trying to watch the TV channels directly from the TV as the picture quality is not as great via the Freeview App via internet.

I plugged the UHF aerial from the Tivo directly onto our LG TV and ran a scan, but it came only with 3 channels, TV1, TV2, Duke and the +1.

Not sure why it did not pick the other one that were available when the aerial cable was plugged onto the Tivo!

Have I missed something obvious?

Do all the other channels need to be added manually? would someone be able to point to the site with the correct frequency details/etc?

Thanks

RunningMan

7960 posts

Uber Geek

#3088438 11-Jun-2023 13:10

Most likely the signal is marginal and the Tivo has a slighyly more sensitive tuner than the TV.

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robjg63

3836 posts

Uber Geek

Subscriber

#3088462 11-Jun-2023 14:06

Peter Robot needs to know how to pop up answers about Freeview UHF!

Freeview(digital TV), is broadcast using Mux (short for Multiplex).

A Mux is a 'bundle' of TV station signals.

This 'bundle', usually corresponds to a channel (or frequency) that you might recognise from the pre digital TV era.

Freeview NZ uses channels 25-62 apparently.

It seems we have up to 6 muxes in use in NZ - Some areas may not get all of them)

In your case, you can only receive the 'TVNZ' mux i.e. the TVNZ stations on a particular channel.

If you can get one of the stations on a mux you will get all of the stations on that mux.

It seems likely that is the only one you are getting enough signal for the TVNZ stations.

Check your aerial and cabling perhaps?

This explains muxes very well:

https://freeviewforum.co.nz/tip/mux

Nothing is impossible for the man who doesn't have to do it himself - A. H. Weiler

fe31nz

1081 posts

Uber Geek

#3088730 11-Jun-2023 23:36

If the TV is an older one, it may be looking on the old frequencies for the muxes. Try and find an option to scan all DVB-T channels, rather than just the Auckland ones. And make sure it is set to 8 MHz bandwidth per channel (7 MHz is for Australia), and to DVB-T not DVB-T2.

This is the official list of frequencies if you want to try manual tuning:

https://www.rsm.govt.nz/assets/Uploads/documents/ab6e11fc39/digital-television-channel-usage-table.pdf

The frequency you want is the centre of the band of frequencies at the top of the table, so for example the TVNZ mux from the Skytower site is listed as 526-534 MHz, so the centre frequency for that is 526+(534-526)/2 = 530 MHz.

trig42

5604 posts

Uber Geek

ID Verified

#3088765 12-Jun-2023 08:42

Go check that your aerial is

a) Still there

b) Pointing in the right direction (compare to your neighbours, get out a map and a compass).

Auckland has had a fair bit of wild weather - pretty easy for an antenna to move or even fall off (ours came down one night, the TVNZ mux was still working, the rest were really dodgy).

The TVNZ mux is (I think) at the lowest frequency of them all and seems to be the easiest to pick up in dodgy reception areas.

20100

21 posts

Geek

#3088908 12-Jun-2023 10:55

thanks everyone for your help.

I tried to manually change a few things, but there was no signal strength for it anyway.

Looks like the antenna must have moved with the wind in the past few months. The odd thing is that it worked fine when the antenna was plugged onto the Tivo. It must have a stonger tuner.

Will try to get an installer to check it out, as the roof is too high for me to climb!

Cheers