Full Freeview on the Rowridge (Isle Of Wight, England) transmitter
 | Google Streetview |  | Google map |  | Bing map |  | Google Earth |  | 50.676,-1.369 or 50°40'35"N 1°22'7"W |  | PO30 4HT |
The symbol shows the location of the Rowridge (Isle Of Wight, England) transmitter which serves 620,000 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.
This transmitter has no current reported problems
The BBC and Digital UK report there are no faults or engineering work on the Rowridge (Isle Of Wight, England) transmitter._______
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 Rowridge 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 Rowridge transmitter?
BBC South Today 1.3m homes 4.9%
from Southampton SO14 7PU, 26km north (354°)
to BBC South region - 39 masts.
ITV Meridian News 0.9m homes 3.6%
from Whiteley PO15 7AD, 24km north-northeast (20°)
to ITV Meridian (South Coast) region - 39 masts.
All of lunch, weekend and 50% evening news is shared with all of Meridian plus Oxford
Are there any self-help relays?
| Portsmouth Docks | Transposer | 2 km N city centre | 50 homes Estimate. Group of houses' |
How will the Rowridge (Isle Of Wight, England) transmission frequencies change over time?
| 1950s-80s | 1984-97 | 1997-98 | 1998-2012 | 2012-13 | 2 May 2018 | ||||
| VHF | A K T | A K T | A K T | A K T | W T | ||||
| C3 | BBCtvwaves | ||||||||
| C21 | C4waves | C4waves | C4waves | +BBCB | BBCB | ||||
| C22 | +ArqA | ArqA | |||||||
| C24 | BBC2waves | BBC2waves | BBC2waves | BBCA | BBCA | ||||
| C25 | SDN | SDN | |||||||
| C27 | ITVwaves | ITVwaves | ITVwaves | D3+4 | D3+4 | ||||
| C28 | ArqB | ArqB | |||||||
| C29 | LSO | ||||||||
| C31 | BBC1waves | BBC1waves | BBC1waves | com7 | |||||
| C37 | com8 | ||||||||
| 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 7 Mar 12 and 21 Mar 12.
How do the old analogue and currrent digital signal levels compare?
| Analogue 1-4 | 500kW | |
| PSB1||, PSB1≡, PSB2||, PSB2≡, PSB3||, PSB3≡ | (-4dB) 200kW | |
| COM4≡, COM4||, COM5≡, COM5||, COM6≡, COM6|| | (-10dB) 50kW | |
| com7≡ | (-13.1dB) 24.4kW | |
| Mux 1*, Mux 2*, Mux A*, Mux B*, Mux C*, Mux D* | (-14dB) 20kW | |
| com8≡ | (-14.3dB) 18.4kW | |
| LSO≡ | (-17dB) 10kW |
Local transmitter maps
Rowridge Freeview Rowridge DAB Rowridge TV region BBC South Meridian (South Coast micro region)Which companies have run the Channel 3 services in the Rowridge transmitter area
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Sunday, 9 September 2012
G
GLENN10:47 AM
Bognor Regis
Po22 9eg roof top aerial-Freeview built in to TV-since 6 sept unable to get itv2,itv4, pick TV, yesterday,qvc, film 4, 4music,Dave,really, viva, itv2 +1, e4 +1, etc-unable to receive broadcast on these channels. have reset TV checked cables etc
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GLENN's: ...
D
David Sutton11:28 AM
Last night we found that many of our freeview channels were showing 'no signal'. From the descriptions on this website it looks as though we are suffering from single frequency interference, possible on several multiplexes. However, when we try to re-tune the TV, we pick up a load of French channels instead.
Any ideas what we can do about this?
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GLENN: Best to switch your aerial to vertical polarisation as the COM channels (those that you're having difficulty with) are 50kW horizontally and 200kW vertically. The Public Service channels are 200kW horizontally and 200kW vertically.
This will also help reduce the likelihood of interference from transmitters in France, which are horizontally polarised.
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David Sutton: Unless you've checked, then it could be that the French stations that you are receiving are not on the same channels/frequencies as the desired ones from Rowridge, and therefore aren't the ones that are compromising local reception. However, it does suggest that signals are carrying further than they normally do and so that could be the cause of the difficulty you are having.
It is possible that it is another transmitter that is interfering with the signals from Rowridge at your location. This doesn't mean that either will be receivable as there may be no overall "winner". Also, unlike with analogue, digital receivers will not start to show the picture carried on the offending signal (if/when it gets strong enough) because they are "looking" for the tuned signals.
So even if the interfering signals come in strong enough to wipe out reception from Rowridge *and* be watchable, your set would still show "no signal", *had* you left it tuned to Rowridge.
As suggested to Glenn, have your aerial switched for vertical polarisation. Never say never, but the transmitters in France that are likely to interfere are horizontally polarised.
Rowridge broadcasts horizontally and vertically, with the Commercial channels being on lower power using the former polarity and are equal to that of the Public Service channels on the latter.
This means that there are potentially two benefits to vertical polarisation.
You should not need to replace your aerial, unless it is defective of course. For some transmitters aerials used for former analogue need replacing to get the full Freeview service. With Rowridge the only thing that is needed is to switch to vertical polarisation.
If you do decide to get another aerial, then don't get a wideband. These are the types that DIY shops sell. These aren't the best for Rowridge. For more information (whether because you wish to install a new aerial or just wish to be informed before calling in a professional), see:
Rowridge Transmitter
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Monday, 10 September 2012
N
Norman Langridge5:40 PM
Can you say why C22, C25 & C28 from Rowridge Horizontal were not increased to 200kw?
I too will now have to alter my aerial to vertical to take advantage of the 200kw transmissions and hopefully avoid the black-out of reception as recently experienced with the 50kw channels.
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Norman Langridge: The COM channels (22, 25 and 28 from Rowridge) do not have as extensive coverage as the Public Service Broadcaster (PSB) ones. Over 1,000 small relay transmitters don't carry them as they are PSB-only. In some cases viewers will need to replace their aerials because the COM channels are broadcast from their chosen transmitter, but outside of the Group of their aerial (that is on UHF channels outside of those that their aerial is most sensitive).
Some transmitters that do carry the COMs radiate them at lower power than the PSBs and this is so that the COM channels can be "re-used" by another transmitter in closer proximity than would otherwise be possible (without the power restriction).
This is the reason for the lower power horizontal COMs signals from Rowridge. These three are used by two neighbouring main (high-power) transmitters: Stockland Hill to the west and Crystal Palace to the north east. These are horizontally polarised only.
The nearest that the three Rowridge PSB channels are used by main transmitters are Redruth to the west, Ridge Hill to the north west and Sandy Heath to the north east. These are further away than the two mentioned at the end of the previous paragraph.
Rowridge is unique in that it is the only main transmitter that broadcasts mixed polarities.
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M
Malcolm Butler10:13 PM
Thanks Mark. I will do as you suggest. Could the drop out of nearly all channels be accounted for by this? If not who do we contact to try to get help? Are we just in a bad spot? If so who carries the can for downdrading our TV experience?
Any help appreciated.
Thanks!
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Tuesday, 11 September 2012
M
Mark Fletcher12:07 AM
Halifax
Malcolm Butler.Im not a fully qualified professional i may add,im just an amateur with some knowledge of most things but i will endeavour to answer the questions you delivered to me in your last text.
It could be one possibility in the first question you raised about the dropout of all channels after 9pm onwards but ok the next morning during clear skies,if your aerial facing Rowridge from your abode which crosses the sea over Poole Bay/English Channel due to local atmospherics or inversion effect could be disturbing your reception during the late night/early hours period,or whether your aerial is black tipped a group W wideband aerial which performs poorly on a all group A mast like Rowridge in a poor/marginal area.
Your second question is a tricky one but you could try Ofcom.
Your third question is are there any obstacles from aerial to mast such as trees,buildings,etc,do you live on high or low ground or in between.
Your fourth and last question probably falls at the hands of any UK/worldwide governments as they orchestrated the switching off of analogue TV and the switch on of all digital TV,this process is happening worldwide,and there's analogue radio coming up due for total switch off in tens or twenty years time.
If you provide your full postcode preferably this is to ascertain reception likelyhoods in your locality,then myself and others more so the true pros on here will equip you with more fuller advice and assistance to you as such.
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Mark's: mapM's Freeview map terrainM's terrain plot wavesM's frequency data M's Freeview Detailed Coverage
J
jb388:19 PM
Malcolm Butler: Regarding the problem of your channels dropping out, much as I do not wish to appear as a prophet of doom but as an engineer I have to say that there is very little you (or anyone) can do about that type of situation "if" its affecting all or most channels, as this indicates that its not co-channel interference being caused by atmospheric conditions but one where the only reason you are getting a signal in the first place is because the signal is being channel along by the reflective actions of the clouds, hence as you have obviously observed that when the said cloud cover vanishes so does your signal.
I have been involved in the past with trouble shooting missions to some of the more remote areas where this type of problem is common place, and although as aforementioned there is very little anyone can do as far as resolving the issue is concerned, such as spending time trying the aerial in different positions etc which in most cases is a totally futile operation, albeit of course this procedure "is" very effective on many occasions with other types of reception problems, however in your particular type of situation there is one thing that sometimes does help and it involves the use of a 20db variable gain booster such as obtainable from Argos, item
number: 534 / 4235 (£11.99) a link for same below.
Of course the use of this type of device only really helps in situations where when the signal drops out its only because that it has dropped to a lower level and "not" completely vanished altogether, something which unfortunately can happen, but the procedure is to check the signal strength / quality whilst reception is basically OK and making a note of the indications seen then when the signal drops out make another similar signal check, as in most cases even although the picture may have vanished the signal will still be there but just at a level that's under the reception threshold of your receivers tuner, once again making a note of the indications seen.
If the test made when the signal drops out reveals that its still there but is only indicating around 20 - 30% or so and that the quality is not fluctuating to any great extent, then the addition of the booster referred to could well lift it to a level that's just high enough above the reception threshold to produce a reasonable (but not perfect) picture.
Another point to note with your type of problem is to refrain from using any type of high gain aerial, as the highly directional properties of this type of aerial can be detrimental to reception rather than assist it.
Argos item number: 534 / 4235 (£11.99)
Buy Plug-In 1 Way TV Aerial Signal Booster at Argos.co.uk - Your Online Shop for Television aerials and boosters, TV aerials, boosters and accessories, TV aerials, boosters and accessories, Television aerials and boosters.
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Thursday, 11 October 2012
D
david cusworth3:37 PM
Brighton
I can get no signal in Brighton on Channel 22 for Pick, Sky News etc. Why?
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david's: mapD's Freeview map terrainD's terrain plot wavesD's frequency data D's Freeview Detailed Coverage
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