Full Freeview on the Crystal Palace (Greater London, England) transmitter
 | Google Streetview |  | Google map |  | Bing map |  | Google Earth |  | 51.424,-0.076 or 51°25'26"N 0°4'32"W |  | SE19 1UE |
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 - Crystal Palace transmitter: Possible effect on TV reception week commencing 25/11/2024 Pixelation or flickering on some or all channels 
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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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Wednesday, 30 March 2011
M
Mike Dimmick8:33 AM
Nick:
That information comes from NGW's Interleaved Frequencies analysis of what channels new multiplexes could potentially be launched on to reach the maximum amount of the Crystal Palace coverage area.
I'd be surprised if enough additional TV services were ready to launch by mid-2012 to require a second new multiplex - C29 (NEW7) would be preferred, but even that isn't ready to go at switchover. There's also a strong chance that the channel plan would have to be redone since the plan it was based on wasn't final.
The plans were made on the basis that while C42 is strictly outside Group A, many Group A aerials have usable gain at that frequency. It's not a sharp cut-off at C38. However, looking at some gain curves I think they're being optimistic: Gain (curves), Again (RG47SH)
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Saturday, 2 April 2011
K
kieran r5:00 PM
Basingstoke
mike dimmick: i have used hannington i got fedup with the trees so i pointed my aerial to C.P i have problems with mux 1 and A i have re checed the tv the tv is fine my post code is RG23 8DS
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kieran's: mapK's Freeview map terrainK's terrain plot wavesK's frequency data K's Freeview Detailed Coverage
M
Mike Dimmick6:00 PM
Reading
Kieran R: I really can't offer any other advice. The signal strength is either too low or the level of interference too high - probably both - for services from Crystal Palace to be reliable at the moment. It will vary over time, because the signal strength *does* vary with changes in weather conditions, including as the atmosphere warms in the morning and cools at night. This is taken into account in the predictions - it's why Digital UK give quite a conservative prediction to the general public, and why the trade view is expressed in probabilities.
Your options are to stick it out for about a year until Crystal Palace switches over (but you might not get mux A, C or D), put the aerial on a longer pole to see over the trees, move the aerial to a different point on the building to see around the trees, cut down or prune the trees, or get satellite or cable.
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Mike's: mapM's Freeview map terrainM's terrain plot wavesM's frequency data M's Freeview Detailed Coverage
K
kieran r7:29 PM
mike dimmik: i dont have trees in the way of C.P but i do on H.Tower im ment to be in a good signal aera
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Sunday, 3 April 2011
B
Boo6:49 PM
Have lost all channels in MUX A entirely on Freeview this week, postcode WD19 area, Watford. Have two boxes on different aerials. One aerial is in a loft, the other is exterior. Both on Crystal Palace transmitter. Have tried resetting both boxes but channels are still not found. Any ideas?
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Monday, 4 April 2011
A
Anthony11:43 AM
I have recently moved in to a property in N7 9SE and tried to set up Freeview HD using the built-in FreeviewHD tuner in my Sony KDL-46EX703U.
I autotuned the digital service and 108 Channels were found. All the standard channels are working fine, but when I browse to any HD channels the signal appears for a split second and goes, flickering in and out of view. What appears is a random image of green squares and so on.
The TV is connected to a communal roof arial and the cabling and arial seem sturdy and not obviously broken - as far as I can see.
Can anyone advise whether I am experiencing bad signal or perhaps the wrong arial etc?
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M
Mike Dimmick3:26 PM
Anthony: Digital UK's predictor shows excellent reception is possible at that address. A check on the terrain shows that you might just be on the back side of a small hill, but it doesn't look like it's blocking the line-of-sight to the transmitter.
A few guesses. First, it's possible that you have too much signal. If signal strengths are generally shown at 90-100% on a Freeview HD box or TV, or over 60 dB, it can cause a problem called intermodulation or cross-modulation. This basically causes signals on adjacent channels to interfere with each other.
Alternatively, it could be that the system hasn't been set up to handle the HD service at this time. Communal systems have to amplify the signal a lot in order to then split the signal to several dwellings. This can be easier if each channel is filtered and then amplified separately - this gives much better results if the levels are different on different frequencies, but can lead to not getting some services at all if the system hasn't been designed to carry that channel.
Ask the building manager if the HD services are currently supported, and to have the levels adjusted so that they're in the right range.
If it is a problem of too much signal, you can also add an attenuator to the lead to reduce the signal levels. It's better to get them to sort it out, though.
You're not very far away from the transmitter, less than 15 km, and for some communal systems you can end up with direct signal pick-up in the TV and a delayed signal from the aerial system. On analogue TV this would cause ghosting. The HD services should be able to handle a delay caused by signals travelling up to 74 km further, though.
Communal systems will need to be adjusted again at switchover, to avoid problems with too much signal, and also due to channel changes. The public service multiplexes are all moving to former analogue channels, and the commercial multiplexes to the channels freed by the PSB muxes. The building management should be prepared for this. Property Managers - Home has information.
The switchover dates for the London region are expected to be announced this Thursday, and are expected to be before July 2012 (before the Olympics). (RG47SH)
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Saturday, 9 April 2011
Sunday, 10 April 2011
J
james4:26 PM
hi there, recently had new aerial in our block, new points, top of the range cable. no problems before this change but not Mux 1 and Mux B channels are fluctuating wildly betwen 100 to 45 %, actually mux b just goes between 40-60% really fast, causing glitches every minute.
Avonline came and turned signal strength down a bit as it was high but this not resolved problem...
neighbour also has it.. these are best two answers so far on digitalspy, anyone agree?
It sounds like there is overloading somewhere in the amplifiers/distribution system (due to high power analogue still being transmitted from Crystal Palace). Check the analogue side of your TV (UHF channels 23, 26, 30 & 33). Do you see any strange patterning on the screen? If so, it's a sure sign there is signal overload. This could be "dazzling" the input side of your Freeview TV/box, and causing the break-up you're getting. Also check with neighbours and see if they have the same problem. If so, get the installers back and tell them to put the system right.
It's the signal quality that matters most, more than the signal level. If/when you get the installers to come back they need to adjust the RF gain so that the signal quality is stable and gives a high reading, on the most troublesome MUX. They should know about things like that, if they're competent.
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Tuesday, 12 April 2011
J
John2:29 AM
I note that Crystal Palace will transmit MUX New8 on ch 42 after switchover (out of group). Which channels will be transmitted on this mux? (ie what channels will I gain if I change to a wideband aerial?
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