Full Freeview on the Emley Moor (Kirklees, England) transmitter
 | Google Streetview |  | Google map |  | Bing map |  | Google Earth |  | 53.611,-1.666 or 53°36'41"N 1°39'57"W |  | HD8 9TF |
The symbol shows the location of the Emley Moor (Kirklees, England) transmitter which serves 1,550,000 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 Emley Moor (Kirklees, England) mast?
Emley Moor transmitter - Emley Moor transmitter: Possible effect on TV reception week commencing 18/11/2024 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
DTG-12 QSPK 8K 3/4 8.0Mb/s DVB-T MPEG2
H/V: aerial position (horizontal or vertical)
Which Freeview channels does the Emley Moor 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
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 Emley Moor transmitter?
BBC Look North (Leeds) 1.9m homes 7.4%
from Leeds LS9 8AH, 22km north-northeast (22°)
to BBC Yorkshire region - 56 masts.
ITV Calendar 1.9m homes 7.4%
from Leeds LS3 1JS, 22km north-northeast (16°)
to ITV Yorkshire (Emley Moor) region - 59 masts.
All of lunch, weekend and 80% evening news is shared with Belmont region
Are there any self-help relays?
| Derwent B | Active deflector | 74 homes | |
| Derwent C | Active deflector | (second level) | |
| Dunford Bridge | Active deflector | 14 km S Huddersfield | 15 homes |
| Hmp Leeds | Transposer | 30 homes | |
| Thixendale | Transposer | 25 km ENE York | 40 homes |
How will the Emley Moor (Kirklees, England) transmission frequencies change over time?
| 1956-80s | 1984-97 | 1997-98 | 1998-2011 | 2011-13 | 5 Feb 2020 | ||||
| VHF | B E T | B E T | B E T | B E T | W T | ||||
| C10 | ITVwaves | ||||||||
| C32 | com7 | ||||||||
| C33 | SDN | ||||||||
| C34 | com8 | ||||||||
| C36 | ArqA | ||||||||
| C37 | C5waves | C5waves | |||||||
| C39 | _local | ||||||||
| C41 | C4waves | C4waves | C4waves | BBCB | BBCB | ||||
| C44 | BBC1waves | BBC1waves | BBC1waves | D3+4 | D3+4 | ||||
| C47 | ITVwaves | ITVwaves | ITVwaves | BBCA | BBCA | ||||
| C48 | ArqB | ArqB | |||||||
| C51tv_off | BBC2waves | BBC2waves | BBC2waves | SDN | |||||
| C52tv_off | ArqA | ||||||||
| C55tv_off | com7tv_off | ||||||||
| C56tv_off | LLS |
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 7 Sep 11 and 21 Sep 11.
How do the old analogue and currrent digital signal levels compare?
| Analogue 1-5 | 870kW | |
| SDN, ARQA, ARQB, BBCA, D3+4, BBCB | (-7dB) 174kW | |
| com7 | (-12dB) 54.8kW | |
| com8 | (-12.3dB) 51.2kW | |
| Mux 1*, Mux 2*, Mux B*, Mux C* | (-19.4dB) 10kW | |
| Mux A*, LLS | (-22.4dB) 5kW | |
| Mux D* | (-23.4dB) 4kW |
Which companies have run the Channel 3 services in the Emley Moor transmitter area
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Tuesday, 20 January 2015
M
Michael7:40 PM
Holmfirth
We live in postcode area HD9 2SP and have been having intermittent reception problems with terrestrial Freeview over the past 3 days - occasional pixellation during a broadcast. We get the same problems on all TVs installed in the house, and have experienced these problems before - I have always assumed that this was due to unusual weather conditions, however our area is shown on the Emley transmitter map as having weaker reception (we live in a valley just out of direct line of sight to the Emley transmitter). Is there anything we can do to eliminate these occasional problems?
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Michael's: mapM's Freeview map terrainM's terrain plot wavesM's frequency data M's Freeview Detailed Coverage
J
jb3811:48 PM
Michael: Unfortunately I would have to say that in my experience there isn't, as reception in situations such as yours of residing in a slight valley which is just under the line of sight from a high powered transmitter located at only around 6 miles or so away is frequently responsible for a viewer experiencing this type of problem, as the signal path running close to the surface of the terrain is vulnerable to fluctuations caused by the changing reflective properties of the terrain, especially so if trees or other vegetation is involved, atmospheric related reasons also playing a role.
That said, it all depends on what you observe if you carry out a signal strength / quality check, as another possible (although less so) reason for your problem could be that the signal strength your TV's are running at is a tad on the high side, but with the level occasionally jumping up now and again resulting in intermittent overloading of the tuner, the effect of being exactly the same as that experienced with an intermittent weak signal.
You should carry out a signal check on BBC1 and also ITV1 and give an update on the results, observing the levels being indicated for around a minute each and making a note of any fluctuations seen, especially if of a more severe nature.
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Friday, 30 January 2015
C
carol1:19 PM
Huddersfield
We have been getting appalling digital TV signal on ITV, Channels 4 and 5, More 4 etc for the past week or so on one of our TVs. All BBC Channels are perfect. This is only happening on one TV in the house, and the aerial is networked to 4 TVs in the house. Can anybody please help or suggest anything please??
Our postcode is HD8 9BE and we can see Emley Moor from our house - we have restrictors installed because the signal is too strong.
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carol's: mapC's Freeview map terrainC's terrain plot wavesC's frequency data C's Freeview Detailed Coverage
Dave Lindsay
1:29 PM
1:29 PM
carol: You say you have attenuator(s) in place (which you refer to as "restrictors"). Perhaps you need to increase your level of attenuation further.
Go to the manual tuning page and enter/select UHF channel 44, but don't press the button to scan/add services. Observe it for a minute or two. If the strength is seen to be high one moment and keep jumping down to low then that could be because the signal level is OTT.
Try pulling the aerial lead out and holding the plug within a centimetre or two. This might "loose" some of the strength. If it stabilises then it could indicate too high a signal level.
If you are feeding 4 ways by a powered booster then attenuation should go before it and not after it. In any case, with such a strong signal you will probably be able to split it four ways with no powered booster (and still potentially require additional attenuation).
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MikeP
10:16 PM
10:16 PM
Dave Lindsay:
It's worth noting that if a passive splitter is used then all the outputs need to be connected to the input of a tuner all the time or have a 'dummy' load connected. This because a splitter is designed so that the impedances of inputs and outputs remain at 75 Ohms to ensure proper matching and that can only be maintained with all outputs having the correct 75 Ohms load connected. Leaving just one output unconnected will give rise to unexpected results and may cause partial or total loss of reception being reported.
That was a problem in analogue days and seems to be worse, or at least more critical, with digitally encoded signals - perhaps because of the way the decoding is performed.
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Dave Lindsay
10:34 PM
10:34 PM
MikeP: Thanks. Impedance matching has always been one of those things I haven't got my head around.
Is it possible to buy 75 ohm load IEC male aerial plugs? I see F-connector ones are available, but this would require an adapter.
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Saturday, 31 January 2015
MikeP
9:17 PM
9:17 PM
Dave Lindsay:
When I was working in TV Servicing during the analogue days we had male and female plugs with 75 Ohm loads built in, but I haven't seen them advertised for some years. Correct termination is crucial when dealing with RF. An aerial is designed to present a 75 Ohm impedance at the connections and the input to any TV tuner is designed to 'see' that 75 Ohms so that the full amount of signal passes into the first stage of the tuner, usually a tuned RF amplifier. If the tuner does not 'see' 75 Ohms, there is a significant loss of signal being transfered into the tuner. Added to that is that mismatching can give rise to internal signal reflections in the cabling, which can mean total loss of signal at the tuner input! And that loss could be frequency specific so you might get good signals at, say, 500 MHz but little or nothing at 510 MHz! Plus you can get some very strange effects due to standing waves in the cables! (Isn't RF fun to play with?!)
Passive splitters are always designed to maintain the impedance matching but only when all outputs and inputs are connected to 75 Ohm devices. Unplug any one and the matching is lost, often resulting in the mismatch effects I described above. Using Ohm's Law you can calculate the values of resistors needed for each leg of the splitter, remembering that all of them must be the same value else the signal is not shared equally.
You can make a terminating plug easily though, all you need is a plug of whatever gender you require and a 75 Ohm wire-ended resistor. One lead is connected to the inner and the other to the outer - simple but can be a bit fiddly. Depending on the actual construction of your chosen plug you may want to solder the wires to the centre pin and the star-shaped fitting that usually connects the outer sheathing of the coax cable to the outer body of the plug. The centre pin wire can usually be passed right down the bore of the pin so there is no risk of it shorting to the outer and it can be trimmed so it does not protrude beyond the pin.
When you assemble the terminating plug don't worry that the end of the resistor and its wire are a little visible, they are at 'ground' potential.
If though you don't want to fiddle with a plug and resitor, you could always get a 75 Ohm F terminator and an F-Coax adapter, such as the ones shown at IEC Spiral Connector 75 Ohm Terminator, (other sources are available).
Note that all references to 75 Ohms in this context is to the presented impedance of the device(s) at the rated RF and not to any DC resistance (an aerial often measures as a short circuit to DC!).
Does that help?
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Sunday, 1 February 2015
Dave Lindsay
11:53 AM
11:53 AM
MikeP: Yes, thanks, it does help.
I ask because I have an aerial which feeds one room and which I'll be fitting a splitter to in order to feed another room. If there is one room which doesn't have a TV in when the other does I can fit one of these terminators if the picture is affected.
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MikeP
8:20 PM
8:20 PM
Dave Lindsay:
Glad to be of assistance. Using passive splitters can give some unexpected problems so I would suggest that if you still want to use a passive, rather than an active that gives gain but isolation between outputs, then it might well be worth having the terminators available and connected to unused outputs to prevent odd events. Note that you always get some loss of signal strength with passive splitting, even when all outputs are properly terminated into 75 Ohms.
Such is the fun of electronics technologies, especially when working with the higher frequencies. When you start looking at the signals in the 10 -100 GHz bands it gets even more critical to have properly designed distribution. I well remember a taxi firm in Nottingham using an improperly set up VHF transmitter that spread interference across not just the VHF radio signals but badly affected local reception of UHF from the Kimberley transmitter and also some immediate neighbours' satellite reception! And all because the transmitter was not 'matched' to the dipole aerial they used.
Let us know how you get on with the signal distrbution.
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Tuesday, 3 March 2015
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