Full Freeview on the Divis (Northern Ireland) transmitter
Brian Butterworth first published this on - UK Free TV
Google Streetview | Google map | Bing map | Google Earth | 54.607,-6.009 or 54°36'24"N 6°0'34"W | BT17 0NG |
The symbol shows the location of the Divis (Northern Ireland) transmitter which serves 440,000 homes. The bright green areas shown where the signal from this transmitter is strong, dark green areas are poorer signals. Those parts shown in yellow may have interference on the same frequency from other masts.
This transmitter has no current reported problems
The BBC and Digital UK report there are no faults or engineering work on the Divis (Northern Ireland) transmitter._______
Digital television services are broadcast on a multiplexes (or Mux) where many stations occupy a single broadcast frequency, as shown below.
64QAM 8K 3/4 27.1Mb/s DVB-T MPEG2
DTG-12 QSPK 8K 3/4 8.0Mb/s DVB-T MPEG2
H/V: aerial position (horizontal or vertical)
Which Freeview channels does the Divis transmitter broadcast?
If you have any kind of Freeview fault, follow this Freeview reset procedure first.Digital television services are broadcast on a multiplexes (or Mux) where many stations occupy a single broadcast frequency, as shown below.
64QAM 8K 3/4 27.1Mb/s DVB-T MPEG2
DTG-12 QSPK 8K 3/4 8.0Mb/s DVB-T MPEG2
H/V: aerial position (horizontal or vertical)
Which BBC and ITV regional news can I watch from the Divis transmitter?
BBC Newsline 0.6m homes 2.5%
from Belfast BT2 8HQ, 1,044km northeast (51°)
to BBC Northern Ireland region - 46 masts.
Are there any self-help relays?
Chapel Fields | Transposer | Central Belfast | 61 homes |
How will the Divis (Northern Ireland) transmission frequencies change over time?
1950s-80s | 1984-97 | 1997-98 | 1998-2012 | 2012-13 | 4 Mar 2020 | ||||
VHF | A K T | A K T | A K T | K T | W T | ||||
C1 | BBCtvwaves | ||||||||
C21 | C4waves | C4waves | C4waves | +D3+4 | D3+4 | ||||
C23 | SDN | SDN | |||||||
C24 | ITVwaves | ITVwaves | ITVwaves | BBCB | BBCB | ||||
C26 | ArqA | ArqA | |||||||
C27 | BBC2waves | BBC2waves | BBC2waves | BBCA | BBCA | ||||
C29 | ArqB | ||||||||
C30 | LBT | ||||||||
C31 | BBC1waves | BBC1waves | BBC1waves | ||||||
C33 | com7 | ||||||||
C34 | com8 | ||||||||
C36 | _local | ||||||||
C48 | NIMM | NIMM | |||||||
C55tv_off | com7tv_off | ||||||||
C56tv_off | COM8tv_off |
tv_off Being removed from Freeview (for 5G use) after November 2020 / June 2022 - more
Table shows multiplexes names see this article;
green background for transmission frequencies
Notes: + and - denote 166kHz offset; aerial group are shown as A B C/D E K W T
waves denotes analogue; digital switchover was 10 Oct 12 and 24 Oct 12.
How do the old analogue and currrent digital signal levels compare?
Analogue 1-4 | 500kW | |
BBCA, D3+4, BBCB | (-7dB) 100kW | |
SDN, ARQA, ARQB | (-10dB) 50kW | |
com8 | (-16dB) 12.7kW | |
com7 | (-16.1dB) 12.4kW | |
LBT | (-20dB) 5kW | |
Mux 1*, Mux 2*, Mux A*, Mux B* | (-23.4dB) 2.3kW | |
Mux C* | (-24dB) 2kW | |
Mux D* | (-24.9dB) 1.6kW | |
NIMM | (-47dB) 10W |
Which companies have run the Channel 3 services in the Divis transmitter area
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Friday, 26 October 2012
C
Carl7:49 PM
Peter
Sounds like your signal is too good/strong sounds like you need to attenuate the signal in other words turn it down.
A 20db attenuator will probably solve your issue.
In cases were your close to the transmitter the TV tuner can get overloaded.
Hope this helps.
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C
Carl8:01 PM
Peter
If you have any internal booster in the Tv menu ensure it is off. Make and model of your setup may help and was it fine before DSO? If so then I would say its overload.
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P
Peter9:01 PM
Carl
Maybe it will sound strange, but before DSO here was impossible to receive any freeview channels. I tested on two different freeview boxes. Now I have TV with built-in freeview. (Digihome LED22913FHDDVD). So, you think a attenuator will solve it? (54.6054,-5.9849)
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C
Carl10:18 PM
Peter
In that case first thing to do is speak to a neighbour or two and see if they are having issues as you should have been getting it before DSO. Find that out first as my previous post is probably irrelevent . The more info you can give the better chance of resolving it.
If your neighbours are getting it then its a fault with your setup.
Regards Carl
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P
Peter11:04 PM
Carl
I see. I will ask therefore.
Thank you very much. I appreciate your help.
Best Regards Peter (54.6054,-5.9849)
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Saturday, 27 October 2012
M
M Collins2:16 PM
I have a free view box BT179LE
I receive bbc hd and channel 4 hd
but cannot get rte
I have an external aerial and previously had a clear rte analogue signal
I assume my box is hd if I recieve bbc hd
any ideas?
mmcd
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M Collins: What aerials have you got pointing where?
Are these (if you have more than one) connected together so as to allow you to view channels from each on the same TV?
At your location the following may be possibilities:
- Divis (Freeview): aerial horizontal @ 352 degrees
- Black Mountain (Freeview): aerial vertical @ 339degrees
- Clermont Carn (Saorview): aerial vertical @ 201degrees
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M
m collins7:34 PM
Dave
thanks
I have an rte aerial as well as one for bbc. (plus unused sky dish)
I am not sure of the where they are pointing. (probably black mountain)
Previously I had rte and the other channels on the same tv
Last night on a regular tuner (on a dvd recorder) i was able to receive audio for rte but no picture. I assumed this was because the tuner was not hd.
I also have a free view box which receives bbc hd it will not pick up rte
I wonder should I search on a different frequency.
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m collins: What you refer to as your "RT aerial" must be pointing to Clermont Carn in the Republic. The system is "Saorview" and some standard definition Freeview receivers won't be able to show a picture (not sure what sort of proportion can and what proportion can't). Evidently yours is one which does not show the Saorview format.
The HD receiver would be expected to be able to. Now I know that you are receiving RT from Clermont Carn, I can tell you that you need to access the manual tune function on your Freeview HD box and tune to UHF/RF channel number 52. If there is a setting for mode (somewhere on the manual tune screen), it should be set to DVB-T rather than DVB-T2.
Check with the DVD recorder what UHF channel it is tuned to for RT. I suspect it will be C52. Do this by going to it and bringing up the signal strength screen. Hopefully it will still show even though it is unable to resolve a picture.
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J
john boyd10:13 PM
thanks dave for taking the time to explain it all
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