All posts by Dave Lindsay
Below are all of Dave Lindsay's postings, with the most recent are at the bottom of the page.
David Brackpool, Mike Dimmick: Mux 2 from Whitehawk is variable because the Patcham relay uses the same channel. It is 1.1 miles north from David's location, although its signal is beamed roughly in its westerley direction.
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Hunter: No, HD is not part of the offering before switchover with the exception of Pontop Pike and Crystal Palace.
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c woodward: Because there are only a few (six I believe) ITV1 HD feeds in the UK for cost reasons. Having more would increase the cost.
The only benefit from a broadcast point of view to having differing local regions is where local programmes are in HD.
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Mark H: Your current aerial may well be a Group B one (tuned to the middle of the band) but Stockland uses Group A channels. See here for an explanation of groups:
Aerials, TV Aerial and Digital Aerial
This is not to say that it won't work. See here for some example gain curves that show gain drops off below the group's channels:
Gain (curves), Again
Remember, if you do try realigning your aerial, then it won't be just a case of spinning it around; you will have to switch it from vertical to horizontal.
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Mark H: If you are going to get another aerial, then have a look at ATV Sheffield. This page lists what they recommend for Stockland Hill:
Digital TV Transmitters Nationwide Page 2
If you get a good signal on the three COMs now at 10kW, then you should be fine at 25kW.
Check ITV3, Pick TV and Yesterday which is one service from each COM multiplex.
For a full list of services on each multiplex see here:
DTG :: DTT Services by Multiplex
I suggest that you check that you have the channels stored correctly. In particular, ensure that you don't have the two (or three) multiplexes from St Thomas instead of Stockland.
Channels used by Stockland are:
BBC A (BBC One etc) Ch26
D3&4 (ITV1 etc) Ch23
BBC B (HD services) Ch29
SDN (ITV3 etc) Ch25
Arq A (Pick TV etc) Ch22
Arq B (Yesterday etc) Ch28
On each of the above services, go to the signal strength screen and it should tell you the UHF channel number.
I should say that I'm not an aerial installer or expert in RF signal propagation. But common sense would suggest that if you can get the low-power COMs now with your set-top aerial, then you are in a good signal area.
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Delahaye: The first thing to check is that your TV is tuned to the correct transmitter.
I assume that your aerial is pointing east at Wharfedale. Go to the signal strength screen on BBC One, it should say that it is on UHF channel 25. If it says anything else (and your aerial is facing east), then it's tuned wrong and that's your problem.
If it's picked up the signal from Addingham, it will say 43. Simple answer is to run the automatic tuning scan with the aerial plugged in, and then unplug it when it gets to 25% so it doesn't "see" the signal from Addingham.
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Jeff Montgomery: Before switchover, the digital signals are weaker than the current analogue ones. After switchover, the digital signals will be strong enough to cover the same area as the current analogue.
Due to the low power digital, some people won't be able to receive them and some will be on the margin.
You might try manually adding the multiplex that carries the services you aren't getting. A multiplex is a signal that carries a basket of services.
Try going through the menu to the manual tune option (assuming it exists on your set) and tune to channel 33.
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Ian Ansell: Hannington's Channel 4 analogue signal is on Ch66 and Midhurst's ITV/C4 digital signal is on Ch65+. The plus meaning that it is offset upwards.
I suggest that the problem might be the analogue signal spilling over onto the digital one you're trying to pick up.
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Ian Ansell: I'm not so sure about this. Hannington and Midhurst are adjacent transmitters, so if you're having problems where you are, then surely those who are closer to Hannington will have it worse.
Here is a map of the transmitters:
http://stakeholders.ofcom….pdf
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Thursday 19 January 2012 6:06PM
Mike Dimmick, Mark H: Rowridge will be transmitting its COMs in both polarisations, but the horizontal ones will be at 50kW whereas the verticals will be 200kW, same as its PSBs in both polarisations.
From Rowridge, only Ch22 has an offset and it is positive.
All the Stockland Hill COMs have negative offsets, which probably explains why Ch22- from Stockland is predicted as being better than the other two.