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3 posts

Wannabe Geek


Topic # 96591 31-Jan-2012 19:07
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Firstly, my apologies if this has been covered before - is there a way to search 106 pages of freeview topics easily?

I live in Whitby, and have marginal reception of freeview from Baxter's knob. Freeview say my reception is "likely with a high antenna".

I have tried a 43 element UHF antenna, and currently have a phased array antenna, mounted at the highest point of the roof, on a 1.5 metre mast. I am not line of sight with the mast, and google earth tells me I have 33 metres of hill between me and the mast! On the skyline between me and Baxter's knob there are trees! I have a mast top amplifier between the antenna and the freeview box.

When the weather is good, I get near perfect reception on channel 57 (Kordia - Prime etc) - just the occasional breakdown of sound or picture. I sometimes get quite reasonable reception of the other two channels (51 and 53). My freeview box (Dishtv) shows between 75% and 95% strength, and quality between 65%  and 95%. However, in 51 and 53 they occasionally disappear altogether.

If the weather is bad (high winds or heavy rain) reception is almost non existent on 51 and 53, and irritatingly patchy on 57.

Firstly, why is Kordia so much better than the other signals?
Secondly, am I likely to get better reception with a better antenna or a professionally installed antenna? What would be a better antenna in these circumstances.

Freeview have told me that they are not adding any more transmitters, so there is little hope of getting it relayed through through the Whitby repeater or similar, and Kaukau, Haywards and Fitzherbery are all worse propositions then Baxter's knob, being even further from line of sight, and much further away.

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Uber Geek
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  Reply # 575719 1-Feb-2012 10:03
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The freeview frequencies at Baxters Knob are changing in June 2012 to CH 33, 35, 37 so you may get an improvement then as they are much lower in frequency than the current channels.
See here
http://www.rsm.govt.nz/cms/policy-and-planning/projects/digital-terrestrial-television-frequency-restacking/timing-and-channel-information

Might pay to wait til then to sort out antenna?



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Wannabe Geek


  Reply # 575846 1-Feb-2012 13:02
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Thanks for the link, hopefully it will be a change for the better, it's been quite frustrating so far.

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  Reply # 575861 1-Feb-2012 13:25
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Kaukau might be worth a crack - I understand it is higher power than the other Transmitters.

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  Reply # 575870 1-Feb-2012 13:38
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I would give Kaukau a crack,  looking at the coverage maps,

http://www.freeviewnz.tv/userfiles/pdfs/Kaukau_Standalone_Freeview.pdf

http://www.freeviewnz.tv/userfiles/pdfs/Baxters_Knob_Standalone_Freeview.pdf

Whitby seems to get marginally better coverage from Kaukau than it does from Baxters knob ( which appears to be a backfill transmitter for the shadowing between Tawa and Titahi bay,

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  Reply # 575889 1-Feb-2012 14:08
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Just remember if you're trying the different sites that the polarity differs so you'll need to flip your aerial 90 degrees. It may also pay to ensure your polarity is correct for Baxters in the first place.




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  Reply # 575923 1-Feb-2012 15:08
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Ummmmm, both Baxters and KauKau are Horizontal and this can cause an issue for some decoders that pick the highest freq mux rather than the highest level/lowest BER.

Until recently I installed antennas in that area for a living, its very fickle, dont be surprised if you end up having to use satellite, however I would recommend you get an installer with a digital FSM to do a proper field test, with lots of hills about and no true line of sight the location on the roof is quite particular.

Cyril

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  Reply # 575942 1-Feb-2012 15:34
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cyril7: Ummmmm, both Baxters and KauKau are Horizontal and this can cause an issue for some decoders that pick the highest freq mux rather than the highest level/lowest BER.

Until recently I installed antennas in that area for a living, its very fickle, dont be surprised if you end up having to use satellite, however I would recommend you get an installer with a digital FSM to do a proper field test, with lots of hills about and no true line of sight the location on the roof is quite particular.

Cyril



Yip, I second that. I live quite high up on the hill near Adventure school in Whitby and we dont get anything (like zero ziltch). I believe Cyril even came round and waved his magic wand around my house with no results either. So we've stuck with MySky to at least get some "HD" content. I even took the aerial off the roof over Xmas as I was up there painting.

Cyril did mention that down closer to the lakes there is a signal so who knows?



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Wannabe Geek


  Reply # 575946 1-Feb-2012 15:42
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I have tried Kaukau. The freeview receiver shows reasonable signal strength and quality on the Kaukau channels (48, 50 and 59?) but reception is very intermittent. We live at the top of Exploration Way, so are tucked under a couple of hills. The coverage maps give a rather optimistic view of Whitby's reception, there are so many nooks and crannies in the area.

Thanks for all the advise, I have been very careful with the polarisation. All this started off as an exercise in whether it was worth getting someone in to set up a freeview antenna so that I could use the TV tuner on my entertainment centre PC, but it 'teased me' into trying a bit more here and there until I am getting quite good at lining up antennas, replacing old cable runs with new, tuning freeview receivers etc.

But Cyril is right, to find out once and for all if it is worth doing, I just have to go ahead and pay someone to do it properly!

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