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Freeview Light on the Alexandra Palace (Greater London, England) transmitter

first published this on - UK Free TV
sa_gmapsGoogle mapsa_bingBing mapsa_gearthGoogle Earthsa_gps51.594,-0.130 or 51°35'38"N 0°7'49"Wsa_postcodeN22 7AY

 

The symbol shows the location of the Alexandra Palace (Greater London, England) transmitter which serves 4,600 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 Alexandra 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 Alexandra 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
C31 (554.0MHz)186mDTG-370W
Channel icons
1 BBC One (SD) London, 2 BBC Two England, 9 BBC Four, 201 CBBC, 202 CBeebies, 231 BBC News, 232 BBC Parliament, 601 BBC Red Button, plus 15 others

PSB2
D3+4
 H max
C32 (562.0MHz)186mDTG-370W
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, 24 ITV4, 33 ITV +1 (London),

PSB3
BBCB
 H max
C37 (602.0MHz)186mDTG-670W
Channel icons
74 Shopping Quarter , 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, 204 CBBC HD, plus 1 others

DTG-3 64QAM 8K 2/3 24.1Mb/s DVB-T MPEG2
DTG-6 256QAM 32KE 2/3 40.2Mb/s DVB-T2 MPEG4
H/V: aerial position (horizontal or vertical)

Are you trying to watch these 51 Freeview channels?

the effected channels
the effected channels
the effected channels
the effected channels

The Alexandra Palace (Greater London, England) mast is a public service broadcasting (PSB) transmitter, it does not provide these commercial (COM) channels: 4Music, 4seven, 5SELECT, 5STAR, 5USA, Aljazeera English, BBC Four HD, BBC News HD, Blaze, Blaze +1, CBeebies HD, CBS Drama, CBS Justice, CBS Reality, Together TV +1, Challenge, Channel 5 +1, CITV, Dave, Dave ja vu, DMAX, Drama, E4 +1, Film4 +1, Food Network, Forces TV, FreeSports, HGTV, Horror Channel, ITV2 +1, ITV3 +1, ITV4 +1, ITVBe +1, More4 +1, NOW 80s, Paramount Network, PBS America +1, pick, Quest +1, Quest Red, Quest Red +1, Really, RT HD, Sky Arts, Sky News, Smithsonian Channel, Sony Movies Action, Talking Pictures TV, TCC, Together TV, Yesterday +1.

If you want to watch these channels, your aerial must point to one of the 80 Full service Freeview transmitters. For more information see the will there ever be more services on the Freeview Light transmitters? page.

Which BBC and ITV regional news can I watch from the Alexandra Palace transmitter?

regional news image
BBC London 4.9m homes 18.4%
from London W1A 1AA, 9km south (186°)
to BBC London region - 55 masts.
regional news image
ITV London News 4.9m homes 18.4%
from London WC1X 8XZ, 8km south (170°)
to ITV London region - 55 masts.

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

1984-971997-981998-20122012-1324 Jul 2019
C/D EC/D EC/D EC/D E TA K T
C31BBCA
C32D3+4
C37BBCB
C49tv_offBBCA
C54tv_offC4wavesC4wavesC4wavesBBCB
C58tv_offBBC1wavesBBC1wavesBBC1wavesD3+4
C61ITVwavesITVwavesITVwaves
C64BBC2wavesBBC2wavesBBC2waves

tv_off Being removed from Freeview (for 5G use) after November 2020 - 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?

BBCA, D3+4, BBCB 70W
Analogue 1-4(-0.3dB) 65W

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. Alexandra 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
Thursday, 19 September 2019
Transmitter engineering
sentiment_very_satisfiedOwner

8:08 AM

ALEXANDRA PALACE transmitter - Freeview: BBC Digital TV Off Air from 15:37 yesterday to 17:16 yesterday, BBC Digital TV Off Air from 14:19 yesterday to 14:33 yesterday, HD Digital TV Off Air from 14:19 yesterday to 14:33 yesterday, HD Digital TV Off Air from 15:37 yesterday to 17:16 ye [BBC]

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Transmitter engineering's 133,390 posts xx
Friday, 20 September 2019
Transmitter engineering
sentiment_very_satisfiedOwner

5:08 AM

ALEXANDRA PALACE transmitter - Freeview: BBC Digital TV Off Air from 15:37 on 18 Sep to 17:16 on 18 Sep, BBC Digital TV Off Air from 14:19 on 18 Sep to 14:33 on 18 Sep, HD Digital TV Off Air from 15:37 on 18 Sep to 17:16 on 18 Sep, HD Digital TV Off Air from 14:19 on 18 Sep to 14:33 on [BBC]

link to this comment
Transmitter engineering's 133,390 posts xx
Transmitter engineering
sentiment_very_satisfiedOwner

5:08 PM

ALEXANDRA PALACE transmitter - Freeview: BBC Digital TV Off Air from 15:37 on 18 Sep to 17:16 on 18 Sep, BBC Digital TV Off Air from 14:19 on 18 Sep to 14:33 on 18 Sep, HD Digital TV Off Air from 14:19 on 18 Sep to 14:33 on 18 Sep, HD Digital TV Off Air from 15:37 on 18 Sep to 17:16 on [BBC]

link to this comment
Transmitter engineering's 133,390 posts xx
Sunday, 22 September 2019
Transmitter engineering
sentiment_very_satisfiedOwner

5:08 AM

ALEXANDRA PALACE transmitter - Freeview: BBC Digital TV Off Air from 14:19 on 18 Sep to 14:33 on 18 Sep, BBC Digital TV Off Air from 15:37 on 18 Sep to 17:16 on 18 Sep, HD Digital TV Off Air from 14:19 on 18 Sep to 14:33 on 18 Sep, HD Digital TV Off Air from 15:37 on 18 Sep to 17:16 on [BBC]

link to this comment
Transmitter engineering's 133,390 posts xx
Sunday, 6 October 2019
Transmitter engineering
sentiment_very_satisfiedOwner

5:08 PM

ALEXANDRA PALACE transmitter - Freeview: HD Digital TV Off Air from 15:32 today to 15:33 today. [BBC]

link to this comment
Transmitter engineering's 133,390 posts xx
Monday, 7 October 2019
Transmitter engineering
sentiment_very_satisfiedOwner

5:08 AM

ALEXANDRA PALACE transmitter - Freeview: HD Digital TV Off Air from 15:32 yesterday to 15:33 yesterday. [BBC]

link to this comment
Transmitter engineering's 133,390 posts xx
Tuesday, 8 October 2019
Transmitter engineering
sentiment_very_satisfiedOwner

4:29 AM

ALEXANDRA PALACE transmitter - Freeview: HD Digital TV Off Air from 15:32 on 06 Oct to 15:33 on 06 Oct. [BBC]

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Transmitter engineering's 133,390 posts xx
Thursday, 14 January 2021
C
cairns
9:46 PM
London

N22 7XQ From Decemb er 2o020 shows,"No sign al" sometimes for hours,sometimes for minutes.Local sets show pixallation or same problem all attemptyds at retuning g failed

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cairns's 1 post GB
Friday, 15 January 2021
C
Chris.SE
sentiment_satisfiedGold

1:59 AM

cairns:

As you have posted on the Alexandra Palace transmitter page, there would be an assumption that normally you might be tuned to it. That said there are no reported problems that I can find for Alexandra Palace.

However, that said, depending exactly where you are within your postcode, higher street numbers are showing not only a slightly better prediction for Alexandra Palace but significantly better predicted reception for Crystal Palace. From your locale, both transmitters are easily within the beamwidth of your aerial.
If you normally receive the full list of available channels, see https://www.freeview.co.uk/corporate/platform-management/channel-listings which also tells you which channels are on which multiplex (group of channels), then you will be picking up Crystal Palace

So you may be tuned to Crystal Palace which is currently listed for Planned Engineering, and was also listed before and just after Christmas with "Possible weak signal", this might account for your problems. Alexandra Palace is a relay of Crystal Palace so might have been affected at some point by the engineering work.

If you retune when you have weak or no signal, often it just clears the correct tuning, you can end up incorrectly tuned to other transmitters with weaker signals etc.
Again, depending on your precise location, predictions show several other transmitters might be received in the "wrong" (weather) conditions. So what does this all mean. You'll need to retune BUT do it manually in the manner I'll explain.

It'll be a good idea to start by checking that your aerial is still pointing in the correct direction and appears undamaged and similarly your downlead. The aerial should be pointing at a bearing of between 167 degrees for Crystal Palace and 173 degrees for Alexandra palace, ie between about 13 degrees and 7 degrees E of due South. If need be, also check all your coax plugs, connections, flyleads etc, unplug connectors check for corrosion or other problems and reconnect them. Flyleads are a common problem, try swapping/changing them. See what signal strengths and quality you are getting for the multiplexes (groups of channels) shown in your TV's tuning section.
Problematic connections, water ingress etc. can seem to affect reception of just AN individual or several multiplexes. Also make sure you don't have any HDMI leads near unscreened/poorly screened flyleads/aerial leads as that can cause interference.

Ok, retune as follows. First unplug the aerial and do a full automatic retune which should clear all existing (and possibly incorrect) tuning.
You now need to try a manual tune (look for Manual Tuning in the TV tuning section) on the following UHF channels listed in the following multiplex order -

BBCA/PSB1, D3&4/PSB2, BBCB HD/PSB3, SDN/COM4, ArqA/COM5, ArqB/COM6, COM7 (HD), Local.
For Crystal Palace - C23, C26, C30, C25, C22, C28, C55, C35
OR for Alexandra Palace - C31, C32, C37 (PSBs only here).

It will depend on your aerial installation which you can get, and if your receiver doesn't have a T2/HD tuner, ignore PSB3 and COM7. You might find that you'll be better tuning to Alexandra Palace for the PSB multiplexes and Crystal Palace for the remainder if Crystal Palace signals appear unreliable. BUT too strong a signal from Alexandra Palace may cause Crystal Palace signals to pixellate, so you might have to try to find a good balance. Sorry if this all sounds complicated.

If you can get PSB3 but not COM7 it may be you have an old Group A aerial. It may not be worth the expense of replacing as COM7 is a temporary multiplex and will close in due course at the latest end of June 2022. If the aerial needs replacing for other reasons then a Group T/Wideband is needed to get all multiplexes BUT your location might mean you'd be better with a Group A aerial to get the other COM multiplexes reliably. An aerial installer with good knowledge of your area would know. Also see what your neighbours get.

The above should enable you to resolve the problem, but bear in mind Crystal Palace is still listed for Planned Engineering at present. If you still have problems, post back with more details about your aerial installation, any splitters etc. and which multiplexes you have problems with.

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Chris.SE's 1,928 posts GB
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