Full Freeview on the Sandy Heath (Central Bedfordshire, England) transmitter
Brian Butterworth first published this on - UK Free TV
Google Streetview | Google map | Bing map | Google Earth | 52.130,-0.242 or 52°7'47"N 0°14'33"W | SG19 2NH |
The symbol shows the location of the Sandy Heath (Central Bedfordshire, England) transmitter which serves 920,000 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.
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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
H/V: aerial position (horizontal or vertical)
Which Freeview channels does the Sandy Heath 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
H/V: aerial position (horizontal or vertical)
Which BBC and ITV regional news can I watch from the Sandy Heath transmitter?
BBC Look East (West) 1.0m homes 3.7%
from Cambridge CB4 0WZ, 29km east-northeast (65°)
to BBC Cambridge region - 4 masts.
70% of BBC East (East) and BBC East (West) is shared output
ITV Anglia News 1.0m homes 3.7%
from Norwich NR1 3JG, 119km east-northeast (60°)
to ITV Anglia (West) region - 5 masts.
All of lunch, weekend and 80% evening news is shared with Anglia (East)
How will the Sandy Heath (Central Bedfordshire, England) transmission frequencies change over time?
1965-80s | 1984-97 | 1997-98 | 1998-2011 | 2011-13 | 12 Feb 2020 | ||||
VHF | A K T | K T | K T | W T | W T | ||||
C6 | ITVwaves | ||||||||
C21 | C4waves | C4waves | C4waves | +BBCB | BBCB | ||||
C24 | ITVwaves | ITVwaves | ITVwaves | D3+4 | D3+4 | ||||
C27 | BBC2waves | BBC2waves | BBC2waves | BBCA | BBCA | ||||
C31 | BBC1waves | BBC1waves | BBC1waves | ||||||
C32 | com7 | ||||||||
C33 | SDN | ||||||||
C34 | com8 | ||||||||
C35 | _local | ||||||||
C36 | ArqA | ||||||||
C39 | C5waves | C5waves | |||||||
C43 | _local | ||||||||
C48 | ArqB | ArqB | |||||||
C51tv_off | SDN | ||||||||
C52tv_off | ArqA | ||||||||
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 30 Mar 11 and 13 Apr 11.
How do the old analogue and currrent digital signal levels compare?
Analogue 1-4 | 1000kW | |
BBCA, D3+4, BBCB | (-7.4dB) 180kW | |
SDN, ARQA, ARQB | (-7.7dB) 170kW | |
com7 | (-13dB) 49.6kW | |
com8 | (-13.1dB) 49.1kW | |
Mux 1*, Mux 2*, Mux A*, Mux B*, Mux C*, Mux D* | (-17dB) 20kW | |
Analogue 5 | (-20dB) 10kW |
Which companies have run the Channel 3 services in the Sandy Heath transmitter area
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Monday, 12 September 2011
M
Mick Tarrant5:12 PM
Since retuning my tv and also my digital set top box I can no longer receive DTT multiplex A stations
10 - 16 -17-23-24-26-27-30-31-38
Can you tell me why
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J
jb385:16 PM
Philip Crack: Although the trade predictor indicates that you presently be receiving Mux Ch67(ArqB) OK, the channel these programmes are on, your reception situation should improve in two days time (14th) when Ch67 changes to its final allocation of Ch48.
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J
jb385:20 PM
Mick Tarrant: As this is involves a reception issue, its impossible to give an answer when you havent indicated your location. (Pref: post code)
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B
Brian Greensides8:22 PM
March
Brian Greensides here. OK Briantist, thanks for the reply, just a couple of things.
What is the significance of the + symbols on channels 21+ and 40+ (are these the different modes)and What mode will they be as of Wednesday(14/9/11) ie 2K or 8K
Thanks once again.
Brian
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Brian's: mapB's Freeview map terrainB's terrain plot wavesB's frequency data B's Freeview Detailed Coverage
Brian Greensides: +/- denotes that the broadcast has an ofset of +/-166kHz, which is rounded up/down above as 0.2MHz.
All multiplexes are 8k, with the exception of Multiplex A which is 2k until 23rd November 2011.
Modes are listed at the top of the page.
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Tuesday, 13 September 2011
M
Mike Dimmick1:18 PM
Brian Greensides: Sandy Heath Mux A/SDN and Mux C/ArqA are both in 2K mode; Mux A uses 64QAM 2/3 and Mux C 16QAM 3/4. We *believe* Mux C/ArqA will stay in 16QAM 3/4 2K mode when it moves to C67 tomorrow, despite it taking that channel over from ArqB which has been running in 64QAM 2/3 8K mode since switchover.
Mux A will stay in 2K mode right up to its final channel change on 9 May 2012.
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TONIGHT - Sandy Heath - ArqB moves from C67 to C48 at 20kW and ArqA moves from C40 to C67 (vacated by ArqB).
Retune required.
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W
Will8:57 PM
Is the final DSO power level for ArqB only 20kW?? Why is it so much lower than the final power levels for the other muxes (180kW and 170kW?
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Will: Yes, that is correct. It is the "bottom of the pile" multiplex so it gets the poorest coverage. It was called "Multiplex D" before which made this clearer.
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Mike Dimmick11:02 PM
Will: No, the final power is 170 kW just like the other two COM multiplexes. It is *currently* running at 20 kW to avoid interference to other transmitters.
The page above says 20 kW because Brian did a bodge to his database, because of the numerous complaints.
20 kW is an inference, actually it has never been explicitly stated that ArqB is running at C67.
The current power level of Mux A and C (not COM5/ArqA as it remains in 16QAM 2/3 2K mode) should be shown as 20 kW.
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