Full Freeview on the Crystal Palace (Greater London, England) transmitter
Brian Butterworth first published this on - UK Free TV
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.
_______
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, 27 April 2012
L
lesg12:03 AM
Reading
I had BBCA mux channels breaking up this (Thursday)evening from about 20.10 for about half an hour (don't know the end time for sure as I switched over to BBCB during the period, as BBCA became unwatchable). All other muxes from Crystal Palace were fine. Anyone else have a problem at that time, or know why this could have happened please?
link to this comment |
lesg's: mapL's Freeview map terrainL's terrain plot wavesL's frequency data L's Freeview Detailed Coverage
M
Mark Fletcher1:08 AM
Halifax
Michael Sainsbury,High Wycombe.No !
link to this comment |
Mark's: mapM's Freeview map terrainM's terrain plot wavesM's frequency data M's Freeview Detailed Coverage
N
NICK ADSL UK 9:31 AM
Crystal Palace was spot on yesterday 100% for quality and strength where i live.
Now considering the day before i got nothing and i was told everything their end was perfect it does make me wonder if they who ever they are have a clue on what their doing
link to this comment |
N
Nick1:49 PM
I have a PC based PVR which uses a Blackgold tuner card which has 2 x DVB-T2 tuners. I receive my signal fro Crystal Palace. Since the switchover, I get a weak signal on the four HD channels (Channel 30). The picture breaks up or audio and picture freeze. Has the transmitter power been decreased or could it be due to the change in frequency?
link to this comment |
Nick: It depends on where you are, but it could be too much signal:
Freeview signals: too much of a good thing is bad for you | ukfree.tv - independent free digital TV advice
link to this comment |
M
Mike Dimmick3:28 PM
NICK ADSL UK: 100% for strength almost certainly indicates too much signal. It's likely that conditions yesterday meant that the levels received were *lower* than usual.
Too much signal causes the amplifiers inside TVs, PVRs and set-top boxes to leave their linear region - where the output of the amplifier is an exact multiple of the signal going in. Instead the signal is distorted, which starts to introduce errors in addition to the errors caused by noise and interference from other transmitters. The error-correction built into the signals can only handle so many errors: once that threshold has been exceeded, the picture and sound start to break up and, as the number of errors increases, very rapidly disappear completely.
The first thing to look at is to turn down or remove any additional amplification. You're distributing the signals to multiple rooms, so you may need to replace the distribution amplifier with a passive splitter. Unfortunately, masthead amplifiers often won't pass the signals through if you just unplug the power supply, you actually have to bypass the connection.
If the signal levels are still very high, you will need to add attenuation to bring them back into spec.
link to this comment |
M
Mike Dimmick3:54 PM
NICK ADSL UK: Incidentally, I noticed that the signal level of the BBC A multiplex, the last two evenings, was much lower than expected: only 34% on my Humax PVR, when it's usually around 60%. I'm out in Reading. The levels of the other four SD multiplexes were what I expected, around 60%. It was back to expected levels this morning.
It could of course be weather conditions or some device of my neighbours' interfering: the cable to my flat goes via a booster/splitter in theirs! Still, I wouldn't expect that to affect the strength of just one multiplex, particularly since BBC A is adjacent to ArqA (which was fine) and only two away from SDN (also fine).
link to this comment |
N
Nick4:26 PM
Thanks for the reply. I think you are right about too much signal. I have a masthead amp and a distribution amp. I put an attenuator in temporarily which has improved things. I'll take the masthead amp out tomorrow and see what happens. Thanks again.
link to this comment |
B
Big Mart6:27 PM
London
So, has anybody got any suggestions why reception on my digital recorder for the HD channels breaks up? I have checked all other muxes and it is perfectly okay. The HD channels are okay on the television.
I have checked my signal is coming from Crystal Palace, and have checked the cables are okay.
The only thing I cannot check is the aerial, which is in a block of flats opposite and fed underground to the houses.
I live in NW9 which according to Google maps is 18 miles away from CP.
(Thanks to David Lindsay for his initial help).
link to this comment |
Big's: mapB's Freeview map terrainB's terrain plot wavesB's frequency data B's Freeview Detailed Coverage
T
tim6:56 PM
Radlett
I suspect you have tried this one, have you plug the aerial directly into the back of the digital recorder to see if you still get signal break up on the HD services?
link to this comment |
tim's: mapT's Freeview map terrainT's terrain plot wavesT's frequency data T's Freeview Detailed Coverage
Select more comments
Your comment please