Full Freeview on the Divis (Northern Ireland) transmitter
 | 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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Thursday, 7 February 2013
W
Wayne Cochran11:53 PM
Armagh
You've probably looked at this, but is the aerial pointing northeast for Divis? Brougher would be northwest.
Pre-DSO, Brougher used mostly the same frequencies as Divis, except for 1 mux. It's possible you could have aligned your aerial on either transmitter then & got all available services, even with slight mutual interference.
What exactly is happening now will depend on where your aerial is actually pointed. I would think there'll be a relatively straightforward explanation.
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Wayne's: mapW's Freeview map terrainW's terrain plot wavesW's frequency data W's Freeview Detailed Coverage
Friday, 8 February 2013
L
Lynn Steenson12:20 AM
Armagh
Wayne Cochran: I have an engineer calling out, to hopefully sort it out. Once its sorted I'll post the findings here!
Thanks for your input :)
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Lynn's: mapL's Freeview map terrainL's terrain plot wavesL's frequency data L's Freeview Detailed Coverage
Lynn Steenson: If it is the case that your aerial is directed to Brougher Mountain, then you will need to investigate the possibility of using Divis instead.
Brougher's COMs are 2kW whereas its PSBs are 20kW. The reason being that its COMs are co-channel with Divis' PSBs and therefore it's done to protect against interference to Divis PSB viewers.
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Sunday, 17 February 2013
Tuesday, 19 February 2013
L
Lynn Steenson2:00 PM
Dave Lindsay: I got the azimuth for divis and moved the aerial ourselves. We are now getting two of the coms - com 5 and 6, but cant get com4! The quality is not great on coms, it comes and goes! I'm still waiting on the engineer to come out and hopefully his professional equipment will find the optimal positioning!
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Lynn Steenson: COM4 is on C23 which is co-channel with Mount Leinster, which is a powerful transmitter.
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Wednesday, 27 February 2013
P
P. Kieran Ward1:05 AM
Belfast
Hi all!
A change of topic!
I have noticed that the sound volume on BBC One NI (HD on BBCB)is much lower than BBC One NI (SD on BBCA). Is there a reason why this might be?
Regards
Kieran
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P.'s: mapP's Freeview map terrainP's terrain plot wavesP's frequency data P's Freeview Detailed Coverage
P. Kieran Ward: On a properly implemented receiver the levels should be the same. But many receivers do not follow the spec and the HD channel will be at least 7dB quieter.
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P
Peter Henderson4:17 PM
Interestingly, on my Humax Freeview HD recorder it's the other way around. Freeview HD channels are significantly louder than the SD ones.
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Saturday, 23 March 2013
E
Eddie10:26 PM
We lost all UK Freeview (Belfast) channels about 25 minutes ago, but the Irish channels are still available on the HD box as are all channels on the Sky dish.
Is this a Divis transmitter problem?
Any ideas?
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