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 11/11/2024 Pixelation or flickering on some or all channels 
_______
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
|
|
Friday, 20 April 2012
D
Dave Hughes10:12 AM
Hi,
To start with I am not a techie so go gentle with me. I live just outside Chelmsford and at about 9pm to 11pm most nights pixels start to drop from my HD channels, also channels seemed to randomly dissapear in the morning. I thought that the retune on 18th would solve this but woke this morning to find BBC radio channels gone, and most of the TV gone, so went through the rigmoral of doing a full rescan again. I select Anglia on my box - but also have the option to select London or Kent, am I doing something wrong or am I doomed to have to do full rescans most days to watch tele / listen to radio. It is frustrating as I have to set up the timer recordings each time I do a full rescan
| link to this comment |
K
Kevin Hodges10:28 AM
Chelmsford
Dave Hughes, I too live in Chelmsford and use Sudbury and receive a good signal. Chelmsford is very localised as to which is the best transmitter. Which way does your aerial point as from Chelmsford Crystal Palace and Sudbury are almost in opposite directions. Might I suggest a manual tune to only select the required channels
| link to this comment |
Kevin's: mapK's Freeview map terrainK's terrain plot wavesK's frequency data K's Freeview Detailed Coverage
C
Chris11:10 AM
Hmm, my channel scan has resulted in all my SDN channels having QPSK modulation?! I've got no idea how QPSK differs from 64QAM, but I still seem to get a picture.
| link to this comment |
Dave Hughes: What transmitter does your aerial point to? If it is Crystal Palace then you need to select London or if it is Sudbury then you need to select Anglia.
If you have two aerials (one on each transmitter) that are combined into one cable, then you should be able to choose either.
| link to this comment |
K
Kate11:51 AM
London
Roger, on one PC I stopped all the media center services, cleared out the database and tried a fresh setup of the TV signal. Big mistake. Now I can get no channels at all on that PC, even after a system restore. On the PC where I just tried to update the TV signal, I can at least get the BBC channels which have not changed location. I have no idea how to fix this.
| link to this comment |
Kate's: mapK's Freeview map terrainK's terrain plot wavesK's frequency data K's Freeview Detailed Coverage
N
NICK ADSL UK 1:39 PM
Just an update in that the aerial engineers for crawley and gatwick and surrounding areas have told me that on the switch over all was well but in the second switch-over everything has gone wrong and they in many cases have had to go out again to find out why
Does anyone know on what the guys at crystal palace have done for the second changeover that was so very different from the first changeover ?
| link to this comment |
D
David Taylor2:42 PM
Swanley
Hi JB38
Tried with an indoor aerial and got freezing
and pixelating but wiggly picture seemed better I think a job to tell with the picture freezing.
Does this mean iv'e got to try and get a signal strength between the two ?
Would an attenuater help?
This is the price of progress I guess after it took me years faffing about to get a decent analogue picture they do away with it.
This seems a familiar story of the powers that be believing all the hype about new technology and jumping in feet first without
thinking of the consequences for the man
(or woman)in the street.
Yours Dave
| link to this comment |
David's: mapD's Freeview map terrainD's terrain plot wavesD's frequency data D's Freeview Detailed Coverage
J
jb384:04 PM
NICK ADSL UK : Well as far as I can gather they haven't really done anything other than up the power of the remaining muxes, that said though, it is possible that this action would have had the effect of further adding to the level of swamping (overloading) that was most likely already being experienced by many from the high powered PSB BBC mux that was already switched, albeit that because there was only one channel involved it only affected a small part of the overall channel span of the tuner, but when the power was increased on the remaining five muxes the high powered signals then covered a broader spectrum and spread the overloading already experienced across a higher percentage of the tuners total channel span, thereby taking the slight overloading already experienced nearer to the critical level at which a receiving devices tuner can cope with before causing picture freezing and glitches of various sorts to occur, and the stage just before complete blocking of the signal.
In other words, most tuners can cope with a strong signal on a small part of a frequency range they might cover, but when overly strong signals are multiplied and cover a larger area in a tuner then the effect on the input circuitry is much greater.
| link to this comment |
N
NICK ADSL UK 4:34 PM
Many thanks JB
I will keep you updated for this neck of the woods and will let you know what the chief engineer of Digital UK has to say when i speak with him on Monday
I'm finding in my house only my 10 years old Japanese sony dvd recorder working perfectly and my sony tv in my daughters bedroom
my sons new phillips tv and our main top of the range new Panasonic that was ok on the first change over but has now failed on the second change over
looks like i will now need to buy a another couple of Sony TV's i do know that only Sony hold the main patent for the receiver chip
samsung and LG TV's don't work in my house at all and never have done despite the companies concerned were looking in to it
My train of thought here is that the whole oversight of the switch over has been badly executed by team without much overall understanding of the tv tuner chips involved
| link to this comment |
J
jb384:45 PM
David Taylor: Yes, what you have found would appear to confirm a case of signal overloading, but as mentioned in my last posting, if signal overloading is the culprit then the symptoms referred to should not be evident at all when viewing the background of a menu screen when NO aerial is plugged in, as that positively confirms that the problem is being caused by an overly strong signal, although of course if you still see the problem without the aerial then it isn't!
I would advise though that rather than purchasing an attenuator at this present time (albeit they are only just under £4.00 or so) reinforce the findings made with the set top aerial by trying a short (about 8 / 12") piece of wire pushed into the inner portion of the aerial socket (a core from two core lighting flex etc) as even although the picture might freeze it doesn't quite matter about that as you are only interested if the wiggly line you refer to has vanished as well as the hum on the audio.
By the way, when referring to the motorised aerial rotator, "if" you are still using that can it be taken that the control / power cable to the aerial is NOT taped onto the co-ax, which of course it should not be, and another little point about some of these Freeview boxes being, that always have cables from / to them well clear of the cabinet, i.e: take them directly away from the rear and never curled on top of, or under the boxes casing, as some boxes radiate horrendous levels of interference from directly above / under the chassis.
| link to this comment |
Select more comments
Your comment please