Full Freeview on the Crystal Palace (Greater London, England) transmitter
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The symbol shows the location of the Crystal Palace (Greater London, England) transmitter which serves 4,490,000 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.
Are there any planned engineering works or unexpected transmitter faults on the Crystal Palace (Greater London, England) mast?
CRYSTAL PALACE transmitter - DAB: Slightly reduced power due to a fault from 23 Dec 07:21. . AM: Radio 4 on MW has now closed. Please retune to FM, Digital Radio, digital TV, BBC Sounds or smart speakers to continue listening. More information can be found on the front page of this 
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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 Crystal Palace 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 Crystal Palace transmitter?
BBC London 4.9m homes 18.4%
from London W1A 1AA, 12km north-northwest (335°)
to BBC London region - 55 masts.
ITV London News 4.9m homes 18.4%
from London WC1X 8XZ, 11km north-northwest (345°)
to ITV London region - 55 masts.
Are there any self-help relays?
| Charlton Athletic | Transposer | Redeveloped north stand Charlton Athletic Football Club | 130 homes |
| Deptford | Transposer | south-east London | 100 homes |
| Greenford | Transposer | 12 km N Heathrow Airport | 203 homes |
| Hendon | Transposer | Graham Park estate | 50 homes |
| White City | Transposer | 9 km W central London | 80 homes |
How will the Crystal Palace (Greater London, England) transmission frequencies change over time?
| 1950s-80s | 1984-97 | 1997-98 | 1998-2012 | 2012-13 | 21 Mar 2018 | ||||
| VHF | A K T | A K T | A K T | A K T | W T | ||||
| C1 | BBCtvwaves | ||||||||
| C22 | ArqA | ArqA | |||||||
| C23 | ITVwaves | ITVwaves | ITVwaves | BBCA | BBCA | ||||
| C25 | SDN | SDN | |||||||
| C26 | BBC1waves | BBC1waves | BBC1waves | D3+4 | D3+4 | ||||
| C28 | -ArqB | ArqB | |||||||
| C29 | LW | ||||||||
| C30 | C4waves | C4waves | C4waves | -BBCB | BBCB | ||||
| C33 | BBC2waves | BBC2waves | BBC2waves | com7 | |||||
| C35 | com8 | ||||||||
| 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 4 Apr 12 and 18 Apr 12.
How do the old analogue and currrent digital signal levels compare?
| Analogue 1-4 | 1000kW | |
| SDN, ARQA, ARQB, BBCA, D3+4, BBCB | (-7dB) 200kW | |
| com7 | (-13.7dB) 43.1kW | |
| com8 | (-14dB) 39.8kW | |
| Mux 1*, Mux 2*, Mux A*, Mux B*, Mux C*, Mux D*, LW | (-17dB) 20kW |
Local transmitter maps
Crystal Palace Freeview Crystal Palace DAB Crystal Palace AM/FM Crystal Palace TV region BBC London LondonWhich companies have run the Channel 3 services in the Crystal Palace transmitter area
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Sunday, 29 April 2018
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Colin R2:43 PM
Weybridge
Peter K: StevensOnln1 is probably right if you have recently installed an amplifier or extra amplifier. But if nothing has changed in your setup and suddenly you are getting this problem then apart from cable or connection faults, it is possible that it is co-channel interference from the recent transmitter channel changes. However this doesn't explain you having this problem on all muxes, so it may well be a signal strength or an intermittent cable / connection fault.
You said that you live far down in Hampshire, so-channel interference may be experienced on channels 55 and 56 because Hannington is since 18 April transmitting Com7 and Com8 on these channels which, for those in the overlap area between Hannington and Crystal Palace, now conflict with Crystal Palace which has been broadcasting these muxes on channels 55 and 56 since 21 March.
You may also experience co channel interference on channel 35 if you are close to the Lambourne repeater transmitter, and / or channel 30 if you are close to the Tidworth repeater, both of which have had channel changes on 18 April that now conflict with Crystal Palace.
Did you start getting your problems from 18 April onwards? If it was earlier then your problem is unlikely to be co-channel interference.
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Colin's: mapC's Freeview map terrainC's terrain plot wavesC's frequency data C's Freeview Detailed Coverage
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StevensOnln15:24 PM
joe jones: Al Jazeera is still broadcasting from Crystal Palace on the COM7 mux which moved to UHF channel 55 last month. If you can't restore it by manual tuning then you most likely have a Group A aerial which is not designed to receive the higher frequencies now used for COM7 & COM8. If this is the case you may be eligible to have a replacement wideband aerial fitted free of charge, which can be arranged by contacting the Freeview Advice Line (see link below).
Important changes to Freeview TV signals | Freeview
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Monday, 30 April 2018
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Chris Roberts10:10 AM
Re: Al Jazeera and all Channel 55 programmes. Since Hannington changed Channels on 18 April, Channel 56 improved considerably BUT Channel 55 Signal Strength & Quality have fallen to ZERO. I too miss Al Jazeera!, The problem is NOT to do with the aerial frequency response but is co-channel anti-phase interference in which transmissions from Crystal Palace & Hannington cancel each other out - they are both about the same strength and clearly anti-phase. Channel 56, on the other hand, from these transmitters are "in-phase" AND HAVE STRENGTHED OUR SIGNAL POST THE HANNINGTON CHANGE.
This is clearly a POLICY problem and needs to be addressed urgently.
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Roger Scott11:40 AM
Chris Roberts
I agree with you on this. I can get signals from both Crystal Palace and Hannington of equal strength and like you I can receive channel 56 (com 8) but get absolutely nothing from channel 55 (com 7)
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Roger 12:31 PM
Maidenhead
Chris Roberts:
Hi there
I also live in area where you can pick up both Crystal Palace and Hannington transmitters. Now unable to get channel 55 (com7) and having no problem with Channel 56 (com8). So, who do you contact to sort out the problem? Digital UK, Arqiva or the BBC
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Roger's: mapR's Freeview map terrainR's terrain plot wavesR's frequency data R's Freeview Detailed Coverage
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Chris Roberts4:56 PM
Great, Fantastic -1645hrs 30 April - Channel 55 restored and quite strong - managed to retune all Channel 55 programmes and all OK. Also all the new channels now working OK. Hope it stays like this!!!
Whoever arranged it - THANKS.
Chris.
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Colin R11:01 PM
Chris Roberts: Great news Chris. However, for some others in this Crystal Palace thread I am sad to repeat my previous tongue-in-cheek comment "Just when you though it was safe to go back in the kitchen.... (or whereever else in your house that your TV is)!"
The reason is that these channels changes to various transmitters are going to go on apace for the rest of the year. The next change that may cause Crystal Palace viewers of Com7 on channel 55 problems is that Rowridge main transmitter (big and powerful like CP and Hannington) on the Isle of Wight is going to start transmitting Com7 on ch 55 on 2 May -Wednesday this week.
Fortunately for you Chris in GU1 and others in the Sonning area etc that have had problems with the Hannington co-channel interference since 18 April, Rowridge signals shouldn't bother you except on the few ocassions a year when there is a 'Tropospheric lift' that allows UHF signals to travel much further than normal, for a few hours or a day or so.
However, people in the overlap between Crystal Palace and Rowridge - roughly north-west to south of Basingstoke and down to a line east of Winchester - who currently choose to watch London programmes from Crystal Palace may possibly start to suffer the same co-channel interference that has affected the Hannington / CP overlap area recently, unless the authorities get the phasing right.
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Colin R11:17 PM
For Crystal Palace viewers who are wondering if the authorities planning and implementing these channel changes for the 700MHz clearance are entirely competent, you may be astonised to read the following excerpt from DigitalUK's Industry Briefing dated Feb 2018, updated Mar 2018 which talks about all of the channel changes in several regions including London, i.e. including Crytal Palace:
Most aerials are expected to be capable of receiving a reliable signal following the changes. However, some grouped aerials - notably group C/D - may need to be updated. A wideband model is generally recommended.
So, notice how this paragraph completly fails to recgnise that everyone tuned to Crystal Palace who have a group A aerial will most likely not be able to receive Com7 and Com8 on ch55 and ch56, unless they live quite close to the transmitter.
How can anyone have any confidence in DigitalUK if they fail to give correct guidance on even the most basic principles that group A aerials are not only not designed to receive 740-760MHz (ch55 & 56), these aerials are actually specifically designed to reject these signals!
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Wednesday, 2 May 2018
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Roy meynell 12:30 PM
Now what are are the cystsl palace trans mitter on is it ,22,23,25:26,28,30:33,
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StevensOnln14:22 PM
Roy meynell : According to Digital UK, Crystal Palace uses UHF channels 23/26/30/25/22/28/55/56/35.
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