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 04/11/2024 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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Tuesday, 1 October 2013
M
MikeB8:36 PM
Brian Greensides: Just looking at your 30/9 post, the fact that bypassing the amp seemed to cure the problem makes me think it was my now standard reply to reception problems - too much signal!
Although your a fair distance from the transmitter, power levels seem to have gone up recently, and so 70% strength, 100% quality sounds perfect.
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J
jb389:08 PM
Brian Greensides: Although the frequencies of Sandy's COM 4 / 5 are indeed close together this is neither here nor there with digital receivers and especially so when they are being radiated from the same mast. However there is one type of situation that such as this would (or might!) apply, and being, if some viewer was attempting to receive a channel from a distant station whilst one of the local stations muxes was operating on an adjacent channel from the one required from the distant station, because if the signal level received from the local mux transmitter was reasonably high then this would result in the receivers auto-gain control circuitry coming into play thereby desensitising the receiver.
It should be said though that breakthrough as such would not occur, as that is something more associated with wider bandwidth analogue reception.
The point I was really trying to make is, that provided that the time factor involved between witnessing the poor quality and rectifying same by removing the splitter / booster was not excessive, meaning more than 15 minutes, because if it was then any high pressure induced interference being experienced could possibly have dropped off during the time taken to bypass the device, however if gap was relatively short then its undeniable that something changed, but whatever it was is definitely not connected with the Waltham or Tacolneston transmitters.
By the way, my reference to the possibility of a new phone mast wasn't specifically a reference to 4G but more along the lines of possible interference caused by a local mast, that said being based on Briantists reception map showing an EE facility between the B1101 and Gas Road near to Springfield Avenue that I did not see listed on the mobile phone mast location site, albeit that this in many cases is out of date as they are not obliged to publish this information.
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MikeB9:22 PM
mark: Your in North Norfolk, which is always a problem for TV reception, and according to the terrain plot, you've got something blocking the signal about 3-5km away no matter which transmitter you use.
Your licence allows you to own/watch TV, it does not mean your going to get a decent signal - thats geography and physics. My advice - go Freesat.
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Thursday, 3 October 2013
J
jb388:57 PM
viclaw: As MK42 could represent a distance of only 10 miles away from the Sandy transmitter if you are using any form of powered booster / splitter then try by passing it by connecting the aerial directly into the Freeview box, if though you do not use such a device then you should check with a neighbour to find out if they are being similarly affected, however if it transpires they are not then your aerial system requires checking.
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M
MikeB10:27 PM
JB38: viclaw has supplied a postcode on this thread
Expecting 4G interference? Tests now show that you have a one in 300 chance | 4G-at-800 | ukfree.tv - 11 years of independent, free digital TV advice
Its 16km - so yep - too much signal might be a problem. Also a shared aerial, so might be a problem there.
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J
jb3811:36 PM
MikeB: Thanks for pointing this out, as I failed to notice that viclaw had already made a posting on the same subject under a different heading, his reply to your request for a location having been made 2 minutes after the posting I had replied to.
However now its known (or appears to be) that a communal aerial is involved then I would have thought that most people would have considered that making a quick with a neighbour or anyone else who resides in the block as being the number one thing to do for an instant answer to the problem, because if others are involved then the complaint should be addressed to the management companies maintenance department as the cure for said problem is outwith the control of the resident.
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Saturday, 5 October 2013
V
viclaw12:18 AM
MikeB and jb38: Thanks for your replies. I will check with neighbours but would something like too much signal be the problem? Seems such a strange reason.
Many thanks
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N
NigelJ9:49 PM
Wisbech
I am a little surprised that the interference is co-channel, as it moves up and down the whole band. Given the structure of the frequency plan, I would have expected co-channel signals to be limited to a few mux frequencies, That is why I suspected it was multipathing from Sandy Heath. I suppose it depends on the channel equalisation specification of the receiver.
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NigelJ's: mapN's Freeview map terrainN's terrain plot wavesN's frequency data N's Freeview Detailed Coverage
D
dave11:51 PM
Peterborough
Thank god for BT Infinity - if we relied on Sandy for any of the channels on the 289m array we would be as entertained as if it was a jigsaw puzzle with no lid... and the rest are intermittent pixilation and break up - 58-60% signal.. most of the time - Bring back Morborne .... And yes we have a new aerial, down lead, booster amp (Digital) correctly aligned aerial ... PE7 1 area ps. admittedly live in a bungalow but not prepared to raise the roof to get a signal.....Mast at 24' - any suggestions other than move?
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dave's: mapD's Freeview map terrainD's terrain plot wavesD's frequency data D's Freeview Detailed Coverage
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