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Full Freeview on the Crystal Palace (Greater London, England) transmitter

first published this on - UK Free TV
sa_streetviewGoogle Streetviewsa_gmapsGoogle mapsa_bingBing mapsa_gearthGoogle Earthsa_gps51.424,-0.076 or 51°25'26"N 0°4'32"Wsa_postcodeSE19 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.

This transmitter has no current reported problems

The BBC and Digital UK report there are no faults or engineering work on the Crystal Palace (Greater London, England) transmitter.

Choose from three options: ■ List by multiplex ■ List by channel number ■ List by channel name
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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.

MuxH/VFrequencyHeightModeWatts
PSB1
BBCA
 H max
C23 (490.0MHz)324mDTG-3200,000W
Channel icons
1 BBC One (SD) London, 2 BBC Two England, 9 BBC Four, 23 BBC Three, 201 CBBC, 202 CBeebies, 231 BBC News, 232 BBC Parliament, 250 BBC Red Button, plus 15 others

PSB2
D3+4
 H max
C26 (514.0MHz)324mDTG-3200,000W
Channel icons
3 ITV (SD) (London), 4 Channel 4 (SD) London ads, 5 Channel 5, 6 ITV 2, 10 ITV3, 13 E4, 14 Film4, 15 Channel 4 +1 London ads, 18 More4, 26 ITV4, 30 E4 +1, 35 ITV +1 (London),

PSB3
BBCB
 H max
C30- (545.8MHz)324mDTG-6200,000W
Channel icons
56 5SELECT, 101 BBC One HD (England no regional news), 102 BBC Two HD (England), 103 ITV HD (ITV London), 104 Channel 4 HD London ads, 105 Channel 5 HD, 106 BBC Four HD, 109 BBC Three HD, 204 CBBC HD, 205 CBeebies HD, plus 1 others

COM4
SDN
 H max
C25 (506.0MHz)314mDTG-8200,000W
Channel icons
12 Quest, 20 Drama, 21 5USA, 29 ITV2 +1, 32 5STAR, 33 5Action, 41 Legend, 42 GREAT! movies action, 46 Channel 5 +1, 58 ITVBe +1, 59 ITV3 +1, 64 Blaze, 67 CBS Reality, 74 Dave ja vu, 78 TCC, 81 Blaze +1, 89 ITV4 +1, 203 CITV, 208 POP MAX, 209 Ketchup TV, 210 Ketchup Too, 211 YAAAS!, plus 15 others

COM5
ArqA
 H max
C22 (482.0MHz)321mDTG-8200,000W
Channel icons
11 Sky Arts, 17 Really, 19 Dave, 31 E4 Extra, 36 pick, 40 Quest Red, 43 Food Network, 47 Film4 +1, 48 Challenge, 49 4seven, 57 Smithsonian Channel, 60 Drama +1, 70 Quest +1, 75 Yesterday +1, 83 Together TV, 233 Sky News, plus 8 others

COM6
ArqB
 H max
C28- (529.8MHz)321mDTG-8200,000W
Channel icons
 FreeSports, 25 W, 27 Yesterday, 34 GREAT! movies, 39 DMAX, 44 HGTV, 71 Quest Red +1, 73 HobbyMaker, 82 Talking Pictures TV, 84 PBS America, 88 Classic Hits, 235 Aljazeera English, plus 19 others

LW
 H -10dB
C35 (586.0MHz)324mDTG-1220,000W
Channel icons
from 31st March 2014: 8 LONDON LIVE,

DTG-3 64QAM 8K 2/3 24.1Mb/s DVB-T MPEG2
DTG-6 256QAM 32KE 2/3 40.2Mb/s DVB-T2 MPEG4
DTG-8 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?

regional news image
BBC London 4.9m homes 18.4%
from London W1A 1AA, 11km north-northwest (334°)
to BBC London region - 55 masts.
regional news image
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 AthleticTransposerRedeveloped north stand Charlton Athletic Football Club130 homes
DeptfordTransposersouth-east London100 homes
GreenfordTransposer12 km N Heathrow Airport203 homes
HendonTransposerGraham Park estate50 homes
White CityTransposer9 km W central London80 homes

How will the Crystal Palace (Greater London, England) transmission frequencies change over time?

1950s-80s1984-971997-981998-20122012-1321 Mar 2018
VHFA K TA K TA K TA K TW T
C1BBCtvwaves
C22ArqAArqA
C23ITVwavesITVwavesITVwavesBBCABBCA
C25SDNSDN
C26BBC1wavesBBC1wavesBBC1wavesD3+4D3+4
C28-ArqBArqB
C29LW
C30C4wavesC4wavesC4waves-BBCBBBCB
C33BBC2wavesBBC2wavesBBC2wavescom7
C35com8
C55tv_offcom7tv_off
C56tv_offCOM8tv_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

Which companies have run the Channel 3 services in the Crystal Palace transmitter area

Sep 1955-Jul 1968Associated-Rediffusion†
Sep 1955-Jul 1968Associated TeleVision◊
Jul 1968-Dec 1992Thames†
Jul 1968-Feb 2004London Weekend Television♦
Jan 1993-Feb 2004Carlton†
Feb 2004-Dec 2014ITV plc♦
Feb 2004-Dec 2014ITV plc†
Feb 1983-Dec 1992TV-am•
Jan 1993-Sep 2010GMTV•
Sep 2010-Dec 2014ITV Daybreak•
• Breakfast ◊ Weekends ♦ Friday night and weekends † Weekdays only. Crystal Palace was not an original Channel 3 VHF 405-line mast: the historical information shown is the details of the company responsible for the transmitter when it began transmitting Channel 3.

Comments
Friday, 21 June 2013
Dave Lindsay
sentiment_very_satisfiedPlatinum

5:26 PM

John V Osborne: Judging by the fact that there are houses with aerials pointing at either transmitter, and in some cases an aerial on each, and looking at the size of those aerials I suggest that perhaps reception from each is about the same.

You don't have line-of-sight to either because you live in a dip. This is probably the reason for higher gain aerials, as at 30 miles from Crystal Palace you aren't that far away, considering its power.

You may find that reception from Crystal Palace varies over time because your aerial is facing the wrong way.

If you are able to pick up the PSB channels from Sandy Heath well with your Group A aerial then perhaps you would be able to pick up the COMs with a suitable aerial.

link to this comment
Dave Lindsay's 5,724 posts GB
J
jb38
sentiment_very_satisfiedPlatinum

6:27 PM

John V Osborne: Just in addition to that said by Dave Lindsay, insomuch that as you are located in an almost perfect position for reception of these two stations via both ends of the aerial (only 2 degrees out), then provided that Crystal Palace is "not" being received via its signal being bounced back onto the front of the Sandy facing aerial from some distant object between Sandy and you I would say that its probably worth while swinging your aerial around 180 degrees.

My reason for saying this being, that when a signal is being received on the rear of an aerial the reflector is partially blocking the signal from reaching the active element, and of course with this being coupled to the fact that the aerial is performing almost exactly as would a rabbit ears set top aerial if positioned in the same spot by the fact that there aren't any directors to focus the signal onto the active element.

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jb38's 7,179 posts GB
Sunday, 14 July 2013
R
Rob
sentiment_satisfiedSilver

3:45 PM

Hi there just want abit of advice... I have very old wideband aerial which ia 20 years old... I want to know will i be better off with a proper group A for Crystal Palace transmitter... I am in RG8 8DB (51.4816,-1.0490) 

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Rob's 171 posts GB
J
jb38
sentiment_very_satisfiedPlatinum

4:19 PM

Rob: Yes, up to a point anyway although for future proofing a "K" group aerial is preferable, the reason being that should COM8 transpire it will be using Ch35 and although a group "A" aerial's upper limit is Ch37, which obviously covers Ch35, in reality its generally found that most of these dedicated group aerials has a tapering off in efficiency starting a few channels before the extent of their published coverage range.

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jb38's 7,179 posts GB
J
jb38
sentiment_very_satisfiedPlatinum

5:04 PM

Rob: Having had further thoughts on your situation and triggered by the fact that you are located at approximately 42 miles away from the transmitter, I think it best NOT to make any allowances for the proposed COM7/8 on Ch's 33 & 35 and stick by the maximum efficiency of using a group "A" aerial.

I say this based on the fact that you might not be able to receive these COM's anyway when taking your location into account as well as the coverage range expected from whats expected to be relatively low powered transmitters used for the purpose of operating as a single frequency network along with Reigate and Guildford.

Just a little point concerning the aerial presently used, I realise that you stated it being a wideband type wideband but are you positive about that? if you have a pair of binoculars kicking around have a look up the very front of the aerial and note if you see a red plastic plug on the end of the horizontal cross boom that holds the elements, if you do then its already a group "A" aerial.

link to this comment
jb38's 7,179 posts GB
Dave Lindsay
sentiment_very_satisfiedPlatinum

7:03 PM

Rob: I bow to jb38's judgement here as he is the professional and I'm not, but the Group A gain curves published by ATV suggest that C37 may have a higher gain than C21:

Gain (curves), Again

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Dave Lindsay's 5,724 posts GB
Monday, 15 July 2013
R
Rob
sentiment_satisfiedSilver

9:21 PM
Reading

thanks to Jb38.. Yes the old aerial has black ends i have seen red ends in the neighbour hood... i saw a few triax 52's and blake high gain aerials with red ends for Crystal palace. seems to be alot black ends pointing for oxford and hannington. I only asked as widebands are pretty poor at the lower end gains... so thats why i asked about getting group A. many thanks guys.. just got to decide triax or blake? which one eh? thank you

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Rob's 171 posts GB
Tuesday, 16 July 2013
J
jb38
sentiment_very_satisfiedPlatinum

9:19 AM

Rob: Well as far as replacement aerials are concerned, I would suggest that either a Blake DMX10A or alternatively a Triax Unix 52 group "A" aerial should prove as being satisfactory for your requirements.

That said, I have to admit that I am always slightly hesitant about recommending high gain aerials for use in reasonably distant non line-of-sight situations (such as applies in your case) for the simple reason that these type of aerials are "only" high gain when precisely aligned on the signal source, this being something which cannot really be guaranteed to last in non line-of-sight situations and where the signal being received from Crystal Palace is only being done so through diffraction (signal bending), this being due to the signal path from CP being affected from approx 20 miles prior to your location and completely obstructed from 5 miles, as seen illustrated on the undermentioned link.

In any non line-of-sight situation and especially so at longer distances, the angle that the signal is being received at can change slightly over the year through a variety of reasons including the atmospheric conditions prevailing at the time, but also to a greater extent through changes to the surface of the terrain, e.g: wet /dry, vegetation, man made structures etc, all of having an effect on the reflective properties of the ground.

When taking my previous statement into account with regards to high gain aerials, anything that causes a slight change in the signal angle reaching the aerials directors, the sole purpose of being to focus the signal onto the aerials "active" element, can result in these hitherto focussing elements partially restricting the signal, this being why that if an aerial that was installed early on the year is alignment checked late autumn its frequently found to require slight trimming.

Needless to say that this sort of thing is generally responsible for people with high gain aerials suffering from higher levels of picture glitching under adverse conditions over those who use lower gain aerials in conjunction with a booster, lower gain aerials having a wider acceptance angle thereby not being quite so critical where angle is concerned.



Terrain between ( m a.g.l.) and (antenna m a.g.l.) - Optimising UK DTT Freeview and Radio aerial location


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jb38's 7,179 posts GB
R
Rob
sentiment_satisfiedSilver

1:27 PM
Reading

Hi Jb38 My area is very difficult area for tv reception as i live down the valley very close to river thames and behind my house there is a rail way line viaduct. I will go for Blake DMX10A... my old aerial is pretty rusted away thats why i want to change it.

Now a tip. if you suddenly get noisy pix elation picture... check your loft booster mine went today was red hot...... took it out put new one in got really good reception from Oxford.... Jb38... can i combine the two aerials together so i can get bbc south and london?

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Rob's 171 posts GB
Wednesday, 17 July 2013
J
jb38
sentiment_very_satisfiedPlatinum

8:26 AM

Rob: With regards to boosters fitted in lofts, the transformers used in these devices are fitted with a thermal fuse (non resetting type) strapped to the windings just under the protective covering, and any time these devices fail its nearly because this fuse has tripped through excessive heat.

On the subject of combining aerials, yes you can combine any station provided that its mux channels are all within the same group, but are you sure that you are picking up Oxford? as this is not indicated as being possible to receive at your location, Hannington is though and it transmits BBC South, you should carry out a signal check on the BBC channel in question and note the mux channel being indicated, Oxford is Ch53 (ITV Ch60) and with Hannington's BBC being on Ch45 (ITV Ch42).





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jb38's 7,179 posts GB
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