All posts by Dave Lindsay
Below are all of Dave Lindsay's postings, with the most recent are at the bottom of the page.
erica: Try going to the manual tuning screen and enter UHF channel 56 (754MHz) - which is that of COM5 from Whitehawk Hill. Do this but don't press the button to scan/add services. Instead, wait and see what reading of strength and quality is given. Does it remain constant or is it varying?
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tricia Lindsay: No, it needs to be connected to the dish by a cable. Look at the LNB which is on the end of the dish's arm. Are there any spare connections and if so then run a cable from one to your upstairs room. If there aren't any spare connections/ports then you can pick up an LNB with more ports online and swap it.
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Mr T Meadows: A quick look at the Digital UK Coverage Checker tells the story and the terrain plot rather nails the likely cause!!
The PSB channels of Hemel Hempstead are co-channel with the COMs of Hannington, albeit opposite polarisations.
The terrain plot to Hemel Hempstead shows clear line-of-sight at 11.4 miles:
Terrain between ( m a.g.l.) and (antenna m a.g.l.) - Optimising UK DTT Freeview and Radio aerial location
The plot to Hannington also shows clear line-of-sight at 43.1 miles:
Terrain between ( m a.g.l.) and (antenna m a.g.l.) - Optimising UK DTT Freeview and Radio aerial location
The plot for Crystal Palace shows clear line-of-sight at 15.4 miles:
Terrain between ( m a.g.l.) and (antenna m a.g.l.) - Optimising UK DTT Freeview and Radio aerial location
Harrow Hill probably isn't sampled for this plot so that's why it's not shown as obstructing the path.
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Dan: Probably interference from Stockland Hill which is in the opposite direction and whose COMs are co-channel with those of Rowridge. Since switchover in April last year Rowridge has been broadcasting vertically as well as horizontally, so the suggestion would be to turn the aerial for vertical polarisation. However, today the powers that be don't connect things up so they're all singing the same hymnsheet which has resulted in the new HD multiplex (COM7) from Rowridge being horizontally polarised only...
So either turn your aerial for vertical polarisation for better COM reception or have it horizontal for COM7 (and COM8 when it comes along) reception with possibly variable COM reception, unless you can site the aerial somewhere that the unwanted Stockland signal is blocked but where it can pick up sufficient Rowridge signal, e.g. mounting it on the side of your house facing Rowridge so that the building acts to block the unwanted signal; this also requires no reflections of the unwanted signal towards the front of the aerial, so no solution like this is guaranteed to work.
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Bob: Have you confirmed that it is tuned to Heathfield and not another transmitter such as Bexhill, as this would seem the most likely?
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Peter Yallop : Mustard uses a the leaf-shaped radiation pattern which faces Norwich, as shown above. You're really on the edge of it so you might need to add some amplification and/or raise the height in order to get it (I note you may be in a bungalow and trees in the way).
Try a manual scan of UHF channel 57. Select/enter 57 but don't press the button to scan/add services straight away. Instead, wait and see if you get a reading for strength and quality and see if it varies or is steady.
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JohnR: The scaffolding would seem a possibility, yes.
A bodge, but may work: what's the signal like on COM7 from Hannington on C32?
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stevecoles: Refer to:
Digital UK Industry - Channel listings
127 is on G_MAN multiplex (or "MEN" above) which is available in Manchester and surroundings.
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Monday 3 November 2014 10:09PM
Steve Dickens: I understand that you are likely to feel miffed at Freeview consisting only of the PSB multiplexes.
See this section for information on DAB:
Digital radio | ukfree.tv - helping the UK with free TV reception since 2002