Full Freeview on the Hemel Hempstead (Hertfordshire, England) transmitter

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3:52 PM

James: Have you replaced your Group B with either a Group E one or a one?

COM5 and COM6 are on the highest which are therefore the furthest away from Group B.

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3:56 PM

Andrew Healy: I suspect that your problem is different to James's.

You would appear to be outside of HH's main area. Also, UK Tradeview suggests that 's BBC A mux could be the cause of your trouble. This is co- with HH's ArqB.

HH's two other Commercial multiplexes, 50 and 59, are co-channel with two of Midhurst's COMs, but these are at half transmission with respect to its PSBs (including BBC A on C55).

A

Alain
10:40 AM
Berkhamsted

Hi, I am in Berkhamsted, receiving from HH. Before the was not brilliant. Now, BBCA and D3+4 are good and very stable but I cannot get SDN, ArqA nor ArqB. Can someone explain this? On the power graph above it seems each mux is transmitted at the same power, so I should receive them as well as the others, no?

Everyone around me seems to be getting their signal from HH (vertically positioned ), but is it possible we could get a better signal from CP?.

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11:04 AM

Alain: Can you manually tune to these three 50, 59, 55, and does your give any indication of strength and when you do so? Different receivers are designed differently and some give more clues away than others so you might like to try different devices.

The only thing I can wonder is if you are picking up too much signal from another that uses these three channels, such as because your aerial happens to be in a good spot for it.

As well as performing the above , try a manual tune to and which are also used by Midhurst. See if these give any signal reading.

A

Alain
7:13 PM
Berkhamsted

Dave L: Thanks for you comment. I'll try a manual tune and let you know what I get. However, I'm not sure if it will be possible as it's a tuner in my PC and I don't have the manual anymore. I'll give it a try anyway.

Is not horizontally polarised though? Is it possible to pick anything up with a vertical ?

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7:37 PM

Alain: To a lesser degree you vertical will pick up horizontally polarised signals.

I have to say that when I made my posting, I was probably clutching at straws with regards a possible explanation.

A terrain plot shows that you are 50 miles from with a few hills in the way, so it is probably unlikely to be the cause:

Terrain between ( m a.g.l.) and (antenna m a.g.l.) - Optimising UK DTT Freeview and Radio aerial location

A

Alain
8:21 AM
Berkhamsted

Dave L: Nice graph from Megalithia! Indeed there seem to be obstacle in the way. Could the interferences come from ?

I've done some tests and it is puzzling: I don't get any above , which is at 100% (whatever that means). Since my is not HD, I thought I maybe had some quirk in my wiring making it a low pass system cutting off above . However, if I manually check , and , I indeed get a signal strength of 0% but the software indicates that the signal is somehow "locked". I'll have to try and find a manual for my card online and see what this means.

Would you have any idea in the meantime?

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12:41 PM

Alain: can't interfere with because they are on different .

I have no idea what your problem might be. It might be worth searching the internet to see if others are in the same position.

There may be a firmware update for the device or there may be new drivers for it that will cure the problem.

R

Rob
10:17 PM
Chesham

I had reasonable service with a aerial aligned to . This gave over 130 though some were not good. After Digital cutover I retuned and got about 40 but only 3 or 4 were watchable - the rest broke up with . We have trees all around us so I bought the best high aerial and installed it on the existing 4M pole using a decent signal meter. But the signal was terrible! I was advised by one of the Digital Cutover support personnel that the from Crystal Palace had been reduced and to try so adjusted the polarisation to vertical. No signal. So I have now reverted to Crystal Palace and a 6M pole will. But am I wasting my time waiting for them to turn the power up again? Have they changed the position/alignment of the aerials at Crystal Palace?

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C

Chris
6:18 PM
Bushey

Hi, I live in Bushey WD23 1BY I have purchased an , it is a screwfix jobbiw, im sure it is high , i dont understand all th lingo to do with aerials but i assume i can tune in to or or Sandy Heats(where ever that is) my questions are : What would be best for me, and do i mount in horizintally ir vertically and also is this serial type ok for all 3 transmitters?
I appreciate your
Ohh and also i have a compass but how do i know the bearing to each transmitter from ehre i live , is there a generic list somewhere?
Thankyou all