All posts by Dave Lindsay
Below are all of Dave Lindsay's postings, with the most recent are at the bottom of the page.
Jim Neary: The oscillation suggests that it could be too high a signal level. Try turning your amplifier down.
According to RTNL, only Kippure broadcasts on C54:
http://www.rtenl.ie/wp-co….pdf
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Rita Mc laughlin: Because all platforms are listed. Underneath each platform's icon, it gives the respective logical channel number. The absence of a number means that it is not available on that platform.
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John: I replied to your message earlier today!
Updated - changes to Freeview channel numbers this week on September 19th 2012 | ukfree.tv - 10 years of independent, free digital TV advice
If you are using the Guisborough transmitter, then it doesn't broadcast the Commercial channels and therefore you are receiving what is being broadcast.
Which transmitter you should be tuned to is that which your aerial faces. As the aerial is on your house, then surely you should be the ones telling us!!
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John: From what you're saying, your aerial must be pointing to Bilsdale rather than the local relay transmitter as it only carries PSB channels.
The COM channels (those that you've lost and which Guisborough doesn't broadcast) are on lower power from Bilsdale than its PSBs (those that Guisborough doesn't transmit). Consequently there will be some on the fringes who will only be able to receive PSBs from Bilsdale (same as the channels broadcast by Guisborough).
Some (who receive from Bilsdale) will have intermittant reception of COMs as digital is an all or nothing thing.
Your TV may tune to another transmitter (one which the aerial doesn't face) as a result of its automatic tuning function and if this is the case, then it needs addressing or you are likely to have intermittent/poor reception because you are using the aerial to receive from a transmitter it doesn't face.
Some receivers automatically tune at will when unattended and in situations where this results in being tuned to the wrong transmitter, then this is obviously a nuisance. In some cases this "function" (I use the term loosely!) can be turned off.
What you need to do is check to see what transmitter your receiver is tuned to for each signal (known as a multiplex):
PSB1 | BBC One | Bilsdale=C26 (Guisborough=C57)
PSB2 | ITV1 | Bilsdale=C29 (Guisborough=C60)
PSB3 | BBC One HD (if applicable) | Bilsdale=C23 (Guisborough=C53)
COM4 | ITV3 | Bilsdale=C43
COM5 | Pick TV | Bilsdale=C46
COM6 | Film4 | Bilsdale=C40
View the signal strength screen whilst on each of the above services (BBC One, ITV1, BBC One HD) and ensure that they are tuned to UHF/RF channel numbers 26, 29 and 23 respectively. If any are on 57, 60 and 53 then they are being received from the Guisborough relay.
If any are being received from the Guisborough relay, then run the automatic tuning scan through and unplug the aerial when it gets to 55% (or past C46 if it gives channel numbers during the scan). You will note that Guisborough uses higher channel numbers than Bilsdale which is why I say unplug the aerial so as not to have it plugged in when it scan Guisborough so it doesn't pick them up.
If, after doing this, any or all of the COMs are missing, then, if your receiver allows, go through to the manual tuning function and tune to 43, 46 and 40 (for ITV3, Pick TV and Film4 respectively).
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John: Knowledge of the model of your TV or set-top box might be useful, especially if I can find its user manual online.
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Tony : That Samsung set cannot receive Freeview HD signals which use DVB-T2 mode. If you are receiving the Irish channels from Black Mountain then this also uses DVB-T2 mode, even though the pictures are standard definition.
Alternatively, if you are receiving the channels directly from one of the Republic's transmitters, then these use DVB-T, but Saorview pictures use MPEG4 format. (Freeview standard definition pictures use the earlier MPEG2 format.)
The information about this model is here:
Support for PS50A457P1D
Page 2 of the manual says "Any functions related to Digital TV (DVB) will only work in countries or areas where DVB-T (MPEG2) digital terrestrial signals are broadcasted."
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Clive B Hill: Run the automatic tuning scan with the aerial unplugged for the first 50%.
The problem is most likely to do with the fact that when the TV scans the frequencies it starts at low frequency and works upwards. BBC from Winter Hill is the highest of the lot, so if it has found others then these have probably filled its memory. The trick, therefore, is to prevent it from "finding" the signals from other transmitters that you aren't interested in, so as to leave space for the one you are interested in.
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Ian Stewart: Is the aerial a wideband or Group K one?
Former Group A aerials may need replacing. Or perhaps you are on the fringes of the COM channels from Craigkelly (which are lower-powered than the PSBs).
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Friday 2 November 2012 11:28AM
Don: For receivers with manual tuning (which all "should" have), try tuning in to 21, 24 and 27 which are the COM channels.