Full Freeview on the Sandy Heath (Central Bedfordshire, England) transmitter
 | 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.
Are there any planned engineering works or unexpected transmitter faults on the Sandy Heath (Central Bedfordshire, England) mast?
Sandy Heath transmitter - Sandy Heath transmitter: Possible effect on TV reception week commencing 30/09/2024 Pixelation or flickering on some or all channels 
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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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Sunday, 27 March 2016
J
jb3810:48 AM
Roy Mackenzie: The problem as reported, could well be down to a defective hard drive. However, if you haven't already done so? I would try reformatting the hard drive, this in the manual for your model being referred to as "re-initialise hard disk". (page39)
It would though be of assistance to have knowledge of your location, as C54 is not one of the Mux channels used by Sandy Heath, your posting having been made under the heading of same.
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J
Jason 5:22 PM
Nn4 area camp hill . I also have a pre Viterbi max . 10.90e-5 . I don't understand what that means but post viterbi is 0 but when things switch on etc it goes into numbers for a 20 secs .
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J
jb3811:07 PM
Jason : Viterbi is a method of error correction used in digital transmission. This in some devices being indicated as BER (bit error rate), although in most Freeview (or Freesat) devices simply indicated as "quality".
'Pre Viterbi' relates to the errors detected on the incoming bit stream, with "post" being the amount of errors after the Viterbi correction algorithm has been applied, so the ideal situation is to have "post" indicating zero.
The 5s values will be the Viterbi measurements averaged over 5 seconds.
Interference from switching on / off household electrical appliances nearly always results in fluctuations in quality, especially so in less than perfect aerial systems, particularly aerials of the indoor (same room) variety.
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Monday, 28 March 2016
J
Jason 4:53 AM
Thank you for replying . So would you say I have a good signal .
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J
jb389:18 AM
Jason: Re signal. Not necessarily so where the strength of the signal is concerned. The following two statements (copied and pasted in) from KMJ,Derby's previous reply being very applicable.
> Slight repositioning of the aerial might make a considerable difference to the signal quality (and strength) being obtained.< (strength being the key word)
> Note that even with 100% quality there could still be interference from light switches due to their close proximity when using indoor or loft mounted aerials.<
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Wednesday, 30 March 2016
M
Mr reeden9:57 AM
Whys the hd channels at such a low power I can only get . 52% signal on ch 32 .34 .
ch52 is 78% all the rest are 79% .
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M
Mr reeden10:21 AM
My tv also breaks up around 4 to 6 times an hour only like 2 blips .
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M
MikeB3:47 PM
Mr reeden: Look at the difference in power between the different coms. And if your signal is breaking up, check which com its on - is the signal too high or too low?
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M
Mr reeden5:59 PM
Quality on mux ch 21 / ch 24 / ch 27 is 95% .
Ch32/34 is 55%
Ch48/51/52 is 87%
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Thursday, 31 March 2016
MikeP
7:46 AM
Trowbridge
7:46 AM
Trowbridge
Mr Reeden:
MikeB was asking for what strength your signals are on the different muxes, not the quality. It is the actual signal strength that can be the cause of your query, so that's the information needed, please?
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MikeP's: mapM's Freeview map terrainM's terrain plot wavesM's frequency data M's Freeview Detailed Coverage
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