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.
Are there any planned engineering works or unexpected transmitter faults on the Rowridge (Isle Of Wight, England) mast?
Rowridge transmitter - Rowridge transmitter: Possible effect on TV reception week commencing 29/04/2024 Screen may go black 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 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, 24 February 2013
J
jb387:57 PM
Roy Barton: Just noticed that Jamie has made a posting earlier on regarding the subject of polarity, me having likewise composed a reply earlier on elsewhere then copied and pasted it into the sites reply box "without" having checked first.
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R
Roy Barton8:33 PM
Wimborne
Roy Barton:
If as Jamie says the V and H signals are identical then they add up to a signal at 45 degress polarisation. Is that right?
If that is the case then I can't really see the point... unless it just a convenient way of getting a large signal that has V and H components.
Possibly a higher power from an transmitter antenna at 45 degrees migh be impractical.
I wonder what an omnidirectional H antenna looks like?
Probably the complexity of a omnidirectional aerial at 45 degrees makes it easier to have separate V and H ???
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Roy's: mapR's Freeview map terrainR's terrain plot wavesR's frequency data R's Freeview Detailed Coverage
R
Roy Barton10:28 PM
Wimborne
To JB38. I too missed your posts when I replied to Jamie. Actually I did understand that you were being hypothetical in regard to combining signals. Your diplexing hypothesis triggered the thoughts I had on how H and V transmissions might interfere with each other if an aerial picked up both polarisations. With every post I get a better understanding.
We have just had another day of perfect reception on all channels. At this rate I won't have to dig out the satellite kit that purchased more than year ago and have not unpacked yet.
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Roy's: mapR's Freeview map terrainR's terrain plot wavesR's frequency data R's Freeview Detailed Coverage
Monday, 25 February 2013
J
jb389:18 PM
Roy Barton: I don't think that Jamie was referring to anything connected to signal strength but more the case of the technical characteristics of the actual signals themselves being identical from both aerials, which of course they are, although problems can still be experienced as referred to in the next paragraph.
Although I am not privy to the details of the aerial set up at Rowridge, the reason for the high power radiating on vertical polarity is to avoid the possibility it causing interference to distant stations and not connected in anyway to the station providing some form of slant polarisation, because as far as using an H and V polarised aerial diplexed together to receive signals from the Rowridge mast is concerned this type of thing is really a non starter, because rather than provide the best of both worlds its liable to be the opposite by it creating the potential for possible phase clash problems to occur in locations where the horizontal signal is received at a reasonably high level, viewers at distances being somewhat better off because of the horizontal component being low.
The only type of situation where a pair of identical aerials facing the same transmitter is capable of giving great results is when they are arranged as a phased pair, the setting up of same really being outwith the domain of most (excl engineers) except the most dedicated enthusiast armed with a high quality signal meter, as it takes the utmost precision (as well as a good deal of patience!) to set up this type of system otherwise no advantage whatsoever is gained, plus even when perfectly set up the advantage can be lost if the signals being received are corrupted by ground reflections etc which unbalances the system.
Of course this type of set up is used more for killing off a signal that's not wanted in favour of the one that is.
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Sunday, 3 March 2013
J
John10:05 AM
I have bad break up,freezing on the following Channels 11,12,17,29,32,36,46,48,and 82.
Plus I get picture freezing etc when I turn on lights or use power devices.
Why, and what can I do to improve the situation.
Any advice would be appreciated.
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K
KMJ,Derby11:33 AM
John: What is the signal strength and quality on C22 compared with say C24 or C25? Select the frequency as if doing a manual tune, but do not press store or save to take readings of the signal being received. If C22 is shown as having lower strength or quality than the other frequencies it could be that the aerial needs slight repositioning to get a clearer view of that particular signal. With regard to interference from switches etc it is advisable to have good quality double screened coax for the downlead and any fly leads to prevent interference pick-up by the cable. Having the aerial mounted for vertical polarisation might prove beneficial, depending on your location, as the COM muxes including C22 are transmitted at 200kW vertical and only 50kW horizontal from Rowridge. If replacing your aerial a log periodic, or a group A yagi fitted with a pcb balun should be chosen for reception from Rowridge. Avoid the wideband models on offer in DIY outlets as these do not perform particularly well on the lower UHF frequencies as used at Rowridge. A good installer should automatically fit the correct aerial type as suggested above.
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JOHN-
To assist you can you please provide
Your location
The type of aerial you have ie red or black tipped
The location of your aerial
How many TVs connect to the aerial
Do you have an amplifier
thanks
Jamie
Qualified Aerial Installer
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Jamie's: mapJ's Freeview map terrainJ's terrain plot wavesJ's frequency data J's Freeview Detailed Coverage
Monday, 29 April 2013
I may have posed this question on here before but now I have more data.
I live in Weymouth & have installed a Group A high gain aerial with a mast head + 25 DB booster.
I obtained a compass bearing from my house to the Rowridge transmitter from the local Coastguard station of 86 degrees & lined it up exactly.
I can get good strength signals on multiplex channels 24, 25, 27,& 28, but on channel 22 which has 2 stations I require, Sky News & Dave the signal strength is pretty steady @ 64 but quality poor to nil.
The modulation alternates between 64QAM to QPSK, I have no idea what this means.
If anybody can give me an explanation why when all of the other channels are ok why should 22 be any different when they are all produced from the same transmitter.
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Tuesday, 30 April 2013
J
jb388:18 AM
Idris Martin: Although the channels referred to might well come from the same mast they are all being radiated from different heights on the mast (BBC at top) by a series of phased panels positioned around it at these different levels, and with this type of system no matter how carefully these panels are positioned the signals beamed out from the mast will never be anything even remotely resembling parallel lines, hence the main beam from some channels might suffer from one of the three main problems that can affect an RF signal, and being - reflection / diffraction / scattering, whereas another beam might not hence why the difference in levels.
The fact of you having previously reported that Ch22 can vary dependant on whether it be a sunny day or not somewhat indicates that Ch22's the signal path suffers from one of the aforementioned potential problems, and of course the further away a person might be from a transmitter (48 miles in your case) the greater the chance of being affected.
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Well thanks jb38 for the info it seems I will just have to grin & bear it.
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