Full Freeview on the Emley Moor (Kirklees, England) transmitter
This transmitter has no current reported problems
The BBC and Digital UK report there are no faults or engineering work on the Emley Moor (Kirklees, England) transmitter.
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The symbol shows the location of the Emley Moor (Kirklees, England) transmitter which serves 1,550,000 homes.
What do the colours on the map mean?
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.List by multiplex|
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See terrain plotWhich Freeview channels does the Emley Moor transmitter broadcast?
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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.
| Mux | Aerial position | Frequency | Height | Mode | Watts |
PSB1
BBCA | horizontal -0.6dB | C47 (682.0MHz) | 578m | 64QAM 8K 2/3
24.1Mb/s DVB-T MPEG2 | 174,000W |
| 
1 BBC One North, 2 BBC Two England, 7 BBC Three, 9 BBC Four, 70 CBBC Channel, 71 CBeebies, 80 BBC News, 81 BBC Parliament, 301 BBC Red Button 1, plus 12 others 200 BBC Red Button, 700 BBC Radio 1, 701 BBC Radio 1Xtra, 702 BBC Radio 2, 703 BBC Radio 3, 704 BBC Radio 4, 705 BBC Radio 5 Live, 706 BBC Radio 5 Live Sports Extra, 707 BBC Radio 6 Music, 708 BBC Radio 4 Extra, 709 BBC Asian Network, 710 BBC World Service,
|
PSB2
D3+4 | horizontal -0.6dB | C44 (658.0MHz) | 578m | 64QAM 8K 2/3
24.1Mb/s DVB-T MPEG2 | 174,000W |
| 
3 ITV (Yorkshire (Emley Moor micro region)), 4 Channel 4 North ads, 5 Channel 5 The North ads, 6 ITV 2, 13 Channel 4+1 North ads, 14 More 4, 28 E4, 33 ITV +1 (Yorkshire Emley Moor),
|
PSB3
BBCB | horizontal -0.6dB | C41 (634.0MHz) | 578m | 256QAM 32KE 2/3
40.2Mb/s DVB-T2 MPEG4 | 174,000W |
| 
101 BBC One HD (England no regional news), 102 BBC Two HD (England), 103 ITV HD (ITV Granada), 104 Channel 4 HD North ads, 303 BBC Red Button HD, plus 1 others 232 The Space,
|
COM4
SDN | horizontal -0.6dB | C51 (714.0MHz) | 566m | 64QAM 8K 3/4
27.1Mb/s DVB-T MPEG2 | 174,000W |
| 
10 ITV 3, 20 G.O.L.D. (not free), 25 Dave ja vu, 26 Home (not free), 27 ITV 2 +1, 30 5*, 31 5USA, 34 ESPN UK (not free), 38 Quest, 39 The Zone, 44 Channel 5 +1, 72 CITV, plus 21 others Bluebird 1, ADULT Playboy, 16 QVC, 23 Bid TV, 49 The Jewellery Channel, 170 ADULT Section, 171 Television X, 180 XxXpanded TV, 201 Teletext Hols, 202 Rabbit, 203 Gay Rabbit, 204 1-2-1 Dating, 228 Christian, 229 CONNECT 2, 230 VISION2, 234 CONNECT 4, 235 God TV, 236 Sony SAB TV Asia, 724 Capital FM, 727 Absolute Radio, 728 Heart,
|
COM5
ArqA | horizontal -0.6dB | C52 (722.0MHz) | 565m | 64QAM 8K 3/4
27.1Mb/s DVB-T MPEG2 | 174,000W |
| 
11 PICK TV, 12 Dave, 17 Really, 29 E4+1, 32 Movie Mix, 46 Challenge, 48 Food Network, 82 Sky News, 87 Community Channel, 302 BBC Red Button 2, plus 9 others 36 Create and Craft, 37 Price Drop TV, 43 Gems TV 1, 173 ADULT smileTV3, 175 ADULT PARTY, 176 ADULT Blue, 177 Babestation Xtra, 206 SkyText, 723 talkSPORT,
|
COM6
ArqB | horizontal -0.6dB | C48 (690.0MHz) | 565m | 64QAM 8K 3/4
27.1Mb/s DVB-T MPEG2 | 174,000W |
| 
15 Film 4, 18 4Music, 19 Yesterday, 21 VIVA, 24 ITV 4, 41 Sky Sports 1 (not free), 42 Sky Sports 2 (not free), 47 4seven, 83 Al Jazeera English, 85 RT English , plus 22 others heat, 0 Argos TV, 22 Ideal World, 35 QVC Beauty, 40 Rocks and Co 1, 172 ADULT smileTV2, 174 Babestation, 199 ADULT Section, 225 VISION, 226 CCTV, 227 Sports, 231 Racing TV , 306 Channel Zero, 711 The Hits radio, 712 Smash Hits!, 713 Kiss, 714 KISSTORY, 715 Magic, 716 Q, 717 Kerrang!, 718 Smooth radio, 725 Premier Radio,
|
Which BBC and ITV regional news can I watch from the Emley Moor transmitter?
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?
| years | 1956~85 | 1984-97 | 1997-98 | 1998-2011 | 2011-13 | 2013-18 | 2013-18 | |
| aerial group | VHF | B E | B E | B E | B E | B E | W | |
| C10 | ITV | | | | | | | |
| 600 | C32 | | | | | | | com7 | |
| C34 | | | | | | | com8 | |
| C37 | | | C5 | C5 | | | | |
| C40 | | | | -2 | | | | |
| C41 | | C4 | C4 | C4 | BBCB | BBCB | BBCB | |
| C43 | | | | -A | | | | |
| C44 | | BBC1 | BBC1 | BBC1 | D3+4 | D3+4 | D3+4 | |
| C46 | | | | -B | | | | |
| C47 | | ITV | ITV | ITV | BBCA | BBCA | BBCA | |
| C48 | | | | | ArqB | ArqB | ArqB | |
| 700 | C49 | | | | -D | | | | |
| C50 | | | | -C | | | | |
| C51 | | BBC2 | BBC2 | BBC2 | SDN | SDN | SDN | |
| C52 | | | | +1 | ArqA | ArqA | ArqA | |
| C56 | | | | | | | local | |
| orange background for multiplexes names more | green background for transmission frequencies | lilac background for power levels in watts | 800MHz band: 4G mobile to start in 2013 | 700MHz band: possible 4G in 2019 more | 600MHz band: new or moved digital TV services more |
Notes:
+ and
- denote 166kHz offset; aerial group are shown as
A B C/D E K WItalics for
analogue, digital switchover was Wednesdays 7th September and 21st September 2011.
- Ofcom have projected that a local television service for Leeds including Dewsbury, Halifax, Huddersfield, Wakefield could use an Interleaved Frequency on the Emley Moor transmitter using C56
- COM7, COM8 projected for 2013-16. COM7 and COM8 to operate as Chesterfield, Emley Moor SFN.
How do the old analogue and currrent digital signal levels compare?
| Analogue 1-5 | 870kW | |
| com7, com8 | (-6.4dB) 200kW | |
| SDN, ARQA, ARQB, BBCA, D3+4, BBCB | (-7dB) 174kW | |
| Mux 1*, Mux 2*, Mux B*, Mux C* | (-19.4dB) 10kW | |
| Mux A* | (-22.4dB) 5kW | |
| PreDSO-BBCB*, Mux D* | (-23.4dB) 4kW | |
Which companies have run the Channel 3 services in the Emley Moor transmitter area
| May 1956-Jul 1968 | Granada Television† |
| May 1956-Jul 1968 | Associated British Corporation◊ |
| Jul 1968-Oct 2002 | Yorkshire Television |
| Oct 2002-Dec 2014 | ITV |
| | Feb 1983-Dec 1992 | TV-am• |
| Jan 1993-Sep 2010 | GMTV• |
| Sep 2010-Dec 2014 | ITV Daybreak• |
|
• Breakfast ◊ Weekends ♦ Friday night and weekends † Weekdays only.
Your comments: most recent posts are at the bottom
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Your comments are always welcome. Please use the form below to add your thoughts or questions to this page. We will get back to you as soon as we can.
G
glennSaturday 1 October 2011 3:52PM
J
jb38Saturday 1 October 2011 4:15PM
M
mike woodwardMonday 3 October 2011 6:31PM
Robert HillMonday 3 October 2011 9:29PM
Mike Woodward at the time of posting all muxes are all ok,in fact watching BBC 1 . Location 3 miles south of Wetherby.
M
mike woodwardTuesday 4 October 2011 9:07AM
Thanks for your reply. When you sent your reply last night my service was also fine, with good signal strength. This morning it is still good but the signal is continually fluctuating from excellent to ok to good and so on. Obviously I am only really interested in a good picture, regardless of signal indicator. However, I am regularly unable to watch since the DSO because of picture breakup. It is so unreliable. Should the signal strength be fluctuating so much and at varying times of day?R
richard caywoodTuesday 4 October 2011 9:22AM
LeedsD
DaveTuesday 4 October 2011 9:32PM
I had to resort to manual tuning and now all is well.M
mike woodwardThursday 6 October 2011 7:05AM
D
daveFriday 7 October 2011 8:45PM
I'm no longer receiving Dave, sky news etc all of which are on the COM5/ArqA Mux. Is this most likely due to a fault with the aerial either not in the right orientation or something else?
Thanks in advance.dave.Friday 7 October 2011.8.45pm.Difficult so say without a postcode,but is your aerial vertical or horizontal polarisation,and what group is your aerial,also is your broadcasting area Emley Moor or Belmont ! D
daveSunday 9 October 2011 5:59PM
LeedsB
Betamax_manSunday 9 October 2011 6:12PM
YorkS
SteveSunday 9 October 2011 6:29PM
Leedsdave.LS2 8AR.Your postcode denotes Crown Plaza in or out of Leeds city centre,and as you stated the aerial is vertical polarisation which Steve of Leeds points out that you're receiving the Beecroft Hill relay transmissions which is a light relay broadcasting three mux's BBCA,D3+4,BBCB and a future fourth mux local some time in the near future.Are Crown Plaza low/high-rise flats/apartments,and if so is the aerial fitted externally (communal type possibly) or do you have an aerial for yourself either an external one or an internal set-top type.If the external antenna is communal,then you will need your landlords consent to have it realigned,if yours then you can if you wish realign it yourself to receive either Emley Moor or possibly Belmont (polarisation will have to be changed to horizontal to receive the before mentioned main transmitters above).Just one note,if you decide to pick up Belmont as a last resort,first two of their mux's ArqA on ch 53 and ArqB on ch 60 both currently on 4kw (both increasing to 100kw after Wed 23 Nov 2011),is for now out of reach until Tacolneston switches over fully on Wed 23 November 2011 due to frequencies 53 & 60 there currently clashing with each other.Secondly Belmont broadcasts BBC1 East Yorkshire and Lincolnshire news bulletins,as well as ITV1 Calendar (East) with more East Yorkshire and Lincolnshire matters.If you did decide to opt for Belmont as a last resort,best bet is to wait until after Wed 23 Nov 2011,when Tacolneston becomes all digital and the two currently understrength Belmont mux's ArqA & ArqB increases in power up to 25 times from that date onwards. J
John ThorndikeWednesday 12 October 2011 5:02PM
Wakefield
Improvement means rubbish service,,,,,,AGAIN
J
John ThorndikeWednesday 12 October 2011 5:02PM
Wakefield
Improvement means rubbish service,,,,,,AGAIN
K
KMJ,DerbyWednesday 12 October 2011 8:20PM
D
DavidWednesday 12 October 2011 10:01PM
S
Stephen PlattThursday 13 October 2011 5:29PM
Hope Valley
Do you have any plans to improve the service?
J
jb38Thursday 13 October 2011 9:10PM
These type of stations are dotted everywhere throughout the UK.
I have an issue with one receiver freezing, when two others that are connected to the same aerial do not.
My Sony RDR-HXD870 freezes I estimate on average every five or ten minutes on C51 (less often on others). Yet the Panasonic TU-CT41 and Hauppauge TV USB dongle don't.
The Hauppauge software has a signal monitor with it and it shows how many errors. When the Sony breaks-up, no errors (correctable or uncorrectable) are shown by the Hauppauge software.
The devices are connected by short 1.5m leads so are not far apart. The Sony does it when it's the only device turned on.
Does the fact that two devices work fine suggest that the aerial and downlead are fine in my location?
The aerial is a 10 element contract wideband fitted in the loft. The downlead is a 10m long crappy coax (silver foil screen with 8 silver conductors!).
It was a DIY purchase from Argos around 15 years ago and has worked perfectly picking up DTT pre-DSO.
I know that it's a poor aerial, but could it be the cause of one receiver having problems when two others don't (on the same channel at the same time)?
I have tried attentuation and it makes no difference. Signal strength given by the Sony (without attentuation) varies between muxes: 70% to 92% Dave Lindsay,Doncaster.I take it your aerial is horizontally polarised,and if so is it pointed towards Emley Moor,or Belmont.The reason pardon my inquisition is that Doncaster where you reside can receive either Emley Moor or Belmont transmissions.Firstly you stated that your contract group W wideband aerial is inferior,i suggest you replace it in due course for a much superior aerial.ATV (Aerials & Television) of Sheffield,are a highly recommended aerial retailer who only sell superior quality aerials in all groups A,B,C/D,K,E,W (dependent on the mast concerned),don't bother buying a new aerial from Argos,B&Q,Wickes or any other DIY store,nor the likes of Labgear,Philex,Maxiview,etc,they're all cheap inferior contract group W wideband aerials.Also the 15 year old Argos bought cheap crappy co-ax you mentioned does need replacing with a much superior double screened copper/copper CAI approved cable (black coloured preferred,but brown will do,white not recommended) with a much superior brass co-ax plug, (not silver,alloy or worse plastic co-ax plugs the're useless).Again ATV of Sheffield stock the above mentioned. J
jb38Saturday 15 October 2011 4:35PM
You could maybe clarify another point though, this regarding the problem being seen when only the Sony is switched on, are you meaning when the aerial is only connected to it and nothing else? because if the aerial is still coupled to the other devices then try it whilst its disconnected from them, as you haven't said anything about the method used to split the aerial between these devices, and if you are using some form of passive splitter then the more that's connected into it the less the signal will be to each device, this applying whether they are switched on or not, powered splitters always being best for this type of thing unless a person sited within a very strong signal area not that far away from the transmitter, you being 25 miles away from Emley Moor.
That said though, I feel that irrespective of answers given the situation could likely be improved by spending some time on re-positioning your aerial within the loft, as most people who fits an aerial into a loft usually plumps for the easiest spot to fix it in, irrespective of the fact that it might not necessarily be the best spot for the signal.
On the subject of the aerial, if it was working OK before switchover then there is no reason whatsoever why it shouldn't be now "if" you are picking up from the same station as before, as since analogue days right up to the present your aerial has always been a group B.
You could probably benefit by replacing the co-ax though!
Briantist: Thanks. I read the page about too much signal being bad a while ago and as a result, was reminded of it when I experienced repeated freezing. I got a variable antennuator (like the one shown in the photograph on that page) and even when the signal strength is attentuated to around 40% (from about 85%) on the most troublesome mux, it makes no difference.
jb38: You have confirmed the conclusion I was coming to: That is that it is an aerial/downlead problem. I'm now using another aerial and it's working just fine.
What threw me was the fact that the Panasonic and Hauppauge work perfectly fine (connected to the same aerial, tuned to the same channel at the same time). That is, listening to all three devices at the same time, only the Sony breaks-up. However, I do appreciate that not all devices are identical.
There is another loft aerial for another room and I've run a coax extension from there to the Sony's input (which was fed from my aerial). So far, so good, no break-up, even though the strength from that aerial is 85% (with no attentuator).
The reason I introduced the passive splitter was so as to allow the amp in the Sony to be turned off when it's in standby. Thus, if it didn't work (using the splitter), then there would be no need to get a powered one because I have one! (All devices are within a metre or so of one another.)
This aerial worked just fine pre-DSO, even during the snow.
I think that the most likely cause is reflections caused by a large warehouse (nearly half a mile long) which was built a number of years ago (ghosting appeared at that time). It is a couple of miles away at about 140 degrees from the direction that the aerial faces. The rooftop aerial also suffered from ghosting on analogue.
It was particularly bad (not terrible by any means though) with my loft aerial on BBC Two analogue, which was on C51, which is now occupied by the mux that is freezing the most. I think it's fair to assume that any such reflected digital signals would have been small (negligible maybe) pre-DSO and increased considerably now.
I remember watching the snooker on analogue (on BBC Two) and seeing a dark impression of the queue ball part way over the screen from the proper one. Does this suggest an inverted reflection?
Mark Fletcher: When I retuned at DSO, I made sure that my tuners were on Emley Moor. Sometimes they do get Belmont. In the past with analogue I tuned presets 5 to 9 (or 6 to 10) to Belmont. Even with the aerial being in the opposite direction, it came in quite strong.
Most Doncastrians seem to be on Emley, except for a few places where the topography doesn't allow. Belmont broadcasts different local news so I would never consider it unless there was no other option.
I've looked extensively at ATV's website. It's excellent with lots of information on how things work, as well as the online shop.
The reason for the DIY purchase from Argos in the early 90s was because that was the only real option! Now the internet has come along, there are many more choices.
I don't hesitate when say that I wouldn't buy the cheap DIY crap again! T
ThomasMonday 17 October 2011 7:11AM
I think it may even be slightly too strong, as I have the issue with my Panasonic TV showing quality as very weak then jumping up to full.B
Brian SpringthorpeTuesday 18 October 2011 6:20PM
In Penmaenmawr in North Wales the number of Freeview channels that we get is probably a complete list, including all the +1 hour and Film 4 and Dave etc.
We regularly go upto the Yorkshire Dales and the Lake District on walking holidays and either stay over in pubs or rent a cottage. We have just come back from a very nice break in Kirkby Lonsdale.
When I switch the provided televisions on in these regions, there isn't the same comprehensive listing that we get here in North Wales. It was noted that chaneels such as Film 4 and Dave plus a load of others were missing from the list. What you would call the major channels, such as ITV1, which normally have a +1 hour channel running, were there but ITV2, 3 and 4 didn't.
I tried retuning but could only get those channels. I checked the parental settings on the TV but the settings were witched to off.
So why can't we watch Film 4 or Dave etc. in Kirkby Lonsdale?
We are going back there in April next year. If its a matter of taking a set top box to cure the problem I can manage that, but I suspect it is something more.
Please help!M
mike Roberts Wednesday 19 October 2011 6:04PM
WiganB
Brian SpringthorpeWednesday 19 October 2011 7:21PM
Carnforth
Can KL actually see the Lancaster transmitter?
KL is so low in the LUNE Valley and the fells seem quite high on the south side.
Do you know anyone for certain that is pointing at Lancaster from Kirkby Lonsdale?mike Roberts : You should be using the Winter Hill transmitter, from which you will receive all services at full strength. M
mike Roberts Thursday 20 October 2011 1:16AM
Wiganmike Roberts : They are all at the same strength in terms of ERP, but the radiation patterns may not be identical.
However, I don't actually know or not, because the information was redacted as a "state secret" when I asked the BBC for the information.
You may also have interference from other transmitters on the same frequencies. M
Mike DimmickThursday 20 October 2011 3:22PM
The power levels as stated are envelope power limits, not absolute limits. In the worst case the different carriers making up the signal could all align the same way at one instant, or all different directions at another instant - the difference between these two conditions is potentially 76 dB! In practice the peak-to-mean ratio is clipped at 7-10 dB, but this is still enough for programme content to mean that different muxes with the same nominal maximum power output read at different levels (source: 
BBC RD - Publications - White Paper 156 DVB-T and Voltage Ratings of Transmission Equipment ).
Really, the box should measure the size of the pilot and TPS carriers, which do *not* change amplitude (though they do change phase), rather than the whole bandwidth, but that is the customary approach.
Finally, as Brian says, there may be differences in the radiation patterns. The radiation pattern of a full transmitting antenna is made up by combining many smaller elements. The UHF aerial for Emley Moor's second mast (this collapsed before the current tower was built) was eight tiers of 6 panels, each panel carrying 4 elements (8 *components* were fitted to each panel, but the active part was the vertical slot *between* the components, odd as that may sound). Again, the slots behave slightly differently at different frequencies - optimal resonance is achieved at 1/4 of the wavelength, so you can never tune the response of an aerial carrying more than one service perfectly for all of them. The overall radiation pattern is made up by the reinforcing and cancelling signals from each element on each panel.
That original antenna contained transformers to feed only 60% of the power into the two panels in each tier on the south-west face, compared to the other two faces. Pushing any more power into the Pennines was considered a waste. You can see the BBC's report on that antenna at BBC RD - Publications - R&D Report 1966-47 : UHF transmitting aerial for the Emley Moor Television Station , particularly how its radiation pattern differed at C44 (BBC One) and C51 (BBC Two).
Because the Emley Moor tower is now a listed building, the external appearance had to remain the same even while changing the antennas inside the fibreglass shrouds at the top of the mast. In turn, though, that meant that Arqiva didn't have to apply for planning permission to change the antennas as they had at most other sites. So we don't know anything about what the new aerial is like and what its radiation pattern might be. Mike Dimmick: That document is interesting. Why might they have decided to implement differing radiation patterns for the two channels? What was the point of this?
The chart published elsewhere by UK Free TV showing the number of homes served by Emley Moor indicates that not all will receive both PSB and commercial muxes:
The commercial multiplex after switchover: ArqA, ArqB and SDN | ukfree.tv - independent free digital TV advice
Presumably some at the fringes will only be able to receive the PSBs.
This is despite them all being listed as having the same ERP of 174kW.
Is this evidence that the radiation patterns of the PSBs and Coms are different? (DN31NJ) M
mike Roberts Thursday 20 October 2011 5:50PM
WiganM
Mike DimmickFriday 21 October 2011 5:04PM
The picture is somewhat exaggerated as engineers normally measure differences in decibels (dB) while those graphs are shown in relative volts. To convert, take the base-10 logarithm of the voltage ratio ('log' on most calculators, LOG10 in Excel) and multiply by 20.
Giving each channel its own antenna at the same site would still be a compromise, as the coverage area is also affected by the aerial's height. Each antenna could be shorter - fewer tiers - to reduce the differences in height, but that would reduce the gain of the aerial and increase the electrical power needed to produce the same output.
In the US, it seems to be common to erect a tower with quite a wide platform that the various antennas then are mounted on - where they do share sites at all. The Empire State Building is festooned with different aerials.
As it is, the commercial multiplexes at Emley Moor are on an aerial slightly further down the mast (about 11.5 metres) than the PSB multiplexes, presumably so that each can be optimized better for the frequencies it's carrying, though it will also offer greater redundancy. The other issue is that the commercial muxes clash more with transmissions from other sites (e.g. Nottingham also uses 48/51/52) and with PSB transmissions from the relay transmitters - both co-channel, using the same channel at both sites, and adjacent-channel interference, due to the imperfect nature of the transmitter - some power leaks into adjacent channels. It is filtered, but filters with a less sharp roll-off are permitted at lower-power sites, therefore more leakage. This only affects the residents near to that site, but it still ends up reducing coverage.
There's a possibility that Emley Moor ArqB might currently be restricted to half power to avoid damage to the low-power Mux 1 at Pontop Pike - there is provision for that in Ofcom's licence documents.
Signal propogation is slightly frequency-dependent, and higher frequencies don't travel quite as well as lower ones, nor carry along cables quite as well. I also mentioned multi-path effects before.
All this put together means you may see different levels across the various multiplexes, and those differences may change over time, despite the published maximum ERPs being identical.Mike Dimmick: Does each mux have its own set of panels then?
Why the gap of 11.5m?
I assumed that underneath the fibreglass shroud there would be rows of panels (without gaps) similar to these being installed at Sandy Heath:
mb21 - The Transmission Gallery (DN31NJ) M
Mike DimmickMonday 24 October 2011 1:24AM
Useful documentation
Emley Moor was originally an IBA transmitter so you'll find it under the Arqiva offer, rather than the ex-NGW (former BBC transmitters).
If you look at Appendix 3, List of Main Stations, you'll see that they intended to construct one antenna for the PSBs, and one for the COMs. The reserve antenna can act for the PSBs or for the COMs but not both at once.
My belief is that the two main antennas, PSB and COM, simply sit on top of one another with the PSBs on top, giving the appearance of forming a single antenna. The difference of 11.5 metres is the distance between the centre points of the two antennas (Ofcom use average height). Each antenna is constructed in halves to allow half-antenna running. Each panel is 1.09m in height - if they're using Radio Freqency Solutions' PHP panels - which would suggest 10 tiers, five tiers in each half antenna.
Sandy Heath's data is odd - Ofcom are listing SDN at the same height as the PSB muxes, which doesn't sound right (and the difference between the two is only 2.7m). It would certainly make sense to put 48/51/52 on a different antenna from 21/24/27. Arqiva did project a Class 2 antenna system, each antenna able to offer half-working (at 6 dB down) so I assume that the top 6 tiers are one antenna for PSBs (in 2 x 3 tiers) and the bottom 6 for the COMs.
The reason I say we don't know exactly what's in there is that at other sites, e.g. Winter Hill, the main antenna is a wrap-around of the main lattice structure - I assume RFS PHP12S which have 12 panels per tier - and at others, e.g. Hannington and Dover, the structure has five faces, e.g. RFS PHP5S. At Dover, only three of the five faces have panels fitted, to reduce the amount of power sent into France. M
mike Roberts Monday 24 October 2011 11:51AM
WiganA
AndyMonday 24 October 2011 4:01PM
Leeds
It just seems strange to have it happening every day in the evening.
I'm mainly wanting to sort this out as I'm looking at topping up for Sky Sports, but I can't see the point of doing it if the signals going to be doing this every time.
CheersA
AndyTuesday 25 October 2011 3:21PM
Leeds
When it was analogue everyone would of been pointed to beecroft. But looking at all the other aerials different installers are pointing them in different directions.
My neighbour has theirs pointing to north/east which can only be Bilsdale far as I can tell, but their signal gets screwed up when a bus goes past.
My brother who lives down the street (LS12 5JD) has his pointing to Emley Moor and gets a brilliant signal at all times (asked him last night).
Just seems strange for our house.Andy Leeds.Your neighbour whose aerial i presume is horizontally polarised which i assume is directed towards Bilsdale (BBC1 North East & Cumbria,ITV1 Tyne-Tees) will have to wait until Wednesday 12 September 2012 (DSO1) and 2 weeks later (DSO2) on Wed 26 Sept 2012 to get much improved high powered digital signals from Bilsdale as at present it is broadcasting both analogue and much lower powered pre digital signals,hence as you implied their reception gets screwed when a bus,etc,goes past.Incidentally when DSO comes to Bilsdale by September 2012,your locality could become an overlapped Emley Moor/Bilsdale (Belmont possibly ?) area,with potential dis/advantages,the advantages being choices of either diplexing a group K aerial (Yagi 18K or XB16K antenna) towards Bilsdale and a group W wideband aerial (probably in your location a Log Periodic will do) towards Emley Moor.The disadvantage possibly if Belmont can be received in your locality being a three main transmitter area overlap.In the case of Belmont which is officially a group W wideband mast,a Yagi or X beam is required to pick up stable Belmont signals in Leeds LS12 area,but most of Belmont's mux's (except for 2 mux's in group C/D band) are on group A frequencies.One option in this scenario would be diplexing a group A aerial with either a group E (recommended),or as a last resort with a group W wideband aerial as their antennas have a poor response on group A frequencies (low signal gains on the lowest frequencies being commonplace). Mike Dimmick: Thanks for the insight and the link. J
JAYNE TWIDDLEFriday 4 November 2011 8:23AM
YorkG
G. H. KnightSunday 6 November 2011 3:49PM
Sheffield
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