Freeview: Rowridge (Isle Of Wight, England) Full Freeview transmitter
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Full Freeview on the Rowridge (Isle Of Wight, England) transmitter

Google StreetviewGoogle mapBing mapGoogle Earth50.676,-1.369 or 50°40'35"N 1°22'7"WPO30 4HT

4G at 800MHz (at800) Freeview reception issues

When 800MHz 4G mobile broadband services start there will be 2 multiplexes in the higher risk range (C21-23, C30, C59-60): C22: ArqA, C21: BBCB
See How do I know if the 4G broadband will overload my Freeview? and Full UK map of 4G issue areas for details.

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. Click to recheck

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The symbol shows the location of the Rowridge (Isle Of Wight, England) transmitter which serves 620,000 homes.

Other maps:Rowridge DABRowridge AM/FMRowridge regionBBC SouthMeridian (South Coast micro region)

Radiation patterns

Radiation patterns withheld

Map key

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|List by channel number|List by channel name|See terrain plot

Rowridge transmitter Freeview broadcasts

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.

MuxAerial positionFrequencyHeightModeWatts
PSB1
BBCA
 vertical max
 horizontal max
C24 (498.0MHz)
320m64QAM 8K 2/3
24.1Mb/s DVB-T MPEG2		200,000W
200,000W
Channel icons
1 BBC One South, 2 BBC Two England, 7 BBC Three, 9 BBC Four, 70 CBBC Channel, 71 CBeebies, 80 BBC News, 81 BBC Parliament, 301 301, plus 12 others

PSB2
D3+4
 vertical max
 horizontal max
C27 (522.0MHz)
320m64QAM 8K 2/3
24.1Mb/s DVB-T MPEG2		200,000W
200,000W
Channel icons
3 ITV (Meridian (South Coast micro region)), 4 Channel 4 South ads, 5 Channel 5 Part Network ads, 6 ITV 2, 13 Channel 4+1 South ads, 14 More 4, 28 E4, 33 ITV +1 (Meridian south coast),

PSB3
BBCB
 vertical max
 horizontal max
C21+ (474.2MHz)
320m256QAM 32KE 2/3
40.2Mb/s DVB-T2 MPEG4		200,000W
200,000W
Channel icons
101 BBC One HD (England no regional news), 102 BBC Two HD (England), 103 ITV HD (ITV Meridian Southampton), 104 Channel 4 HD South ads, plus 1 others

COM4
SDN
 vertical max
 horizontal -6dB
C25 (506.0MHz)
299m64QAM 8K 3/4
27.1Mb/s DVB-T MPEG2		200,000W
50,000W
Channel icons
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 22 others

COM5
ArqA
 vertical max
 horizontal -6dB
C22+ (482.2MHz)
302m64QAM 8K 3/4
27.1Mb/s DVB-T MPEG2		200,000W
50,000W
Channel icons
11 PICK TV, 12 Dave, 17 Really, 29 E4+1, 32 Movie Mix, 46 Challenge, 48 Food Network, 82 Sky News, 87 Community Channel, plus 9 others

COM6
ArqB
 vertical max
 horizontal -6dB
C28 (530.0MHz)
302m64QAM 8K 3/4
27.1Mb/s DVB-T MPEG2		200,000W
50,000W
Channel icons
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 21 others



Regional news from the Rowridge transmitter


BBC South Today 1.3m homes 4.9%
from Southampton SO14 7PU, 26km north
to BBC South region - 39 masts.

ITV Meridian News 0.8m homes 3.2%
from Whiteley PO15 7AD, 24km north-northeast
to ITV Meridian (South Coast) region - 36 masts.

Self-help relays

Portsmouth DocksTransposer2 km N city centre50 homes Estimate. Group of houses'

How the transmission frequencies change over time

years1950s~851984-971997-981998-20122012-132013-182013-182019-
aerial groupVHFA KA KA KA KA KA KA K
C3BBCtv
C21C4C4C4+BBCB+BBCB+BBCBBBCB
C22+ArqA+ArqA+ArqASDN
C24BBC2BBC2BBC2BBCABBCABBCAD3+4
C25SDNSDNSDNArqA
C27ITVITVITVD3+4D3+4D3+4BBCA
C28+BArqBArqBArqBArqB
C30-Alocal
600C31BBC1BBC1BBC1com7
C32+2
C33+D
C341
C37+Ccom8

orange background for multiplexes names moregreen background for transmission frequencieslilac background for power levels in watts800MHz band: 4G mobile to start in 2013700MHz band: possible 4G in 2019 more600MHz band: new or moved digital TV services more
Notes: + and - denote 166kHz offset; aerial group are shown as A B C/D E K W
Italics for analogue, digital switchover was Wednesdays 7th March and 21st March 2012.

  • Ofcom have projected that a local television service for Southampton including Eastleigh, Fareham, parts of Isle of Wight, parts of Portsmouth, Winchester could use an Interleaved Frequency on the Rowridge transmitter using C30
  • COM7, COM8 projected for 2013-16. COM7 and COM8 to operate as Midhurst,Rowridge VP, Salisbury SFN.
  • COM7, COM8 projected for 2013-16.

Comparison of old analogue and current digital signal levels

Analogue 1-4 500kW
COM4||, COM5||, COM6||, com7≡, com7||, com8||, com8≡, PSB1≡, PSB1||, PSB2≡, PSB2||, PSB3≡, PSB3||(-4dB) 200kW
COM4≡, COM5≡, COM6≡(-10dB) 50kW
Mux 1*, Mux 2*, Mux A*, Mux B*, Mux C*, Mux D*(-14dB) 20kW

History of Channel 3 in the Rowridge transmitter area

• Breakfast ◊ Weekends ♦ Friday night and weekends † Weekdays only. Rowridge was not an original Channel 3 VHF 405-line mast: the historical information shown is the details of the company responsible for the transmitter when it began transmitting Channel 3.


Your comments: most recent posts are at the bottom

firstFirst comments prevEarlier comments  ◊ 

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.

Roy Barton
Sunday 24 February 2013 11:40AM Wimborne
Given what I wrote above, I can see it would not be a good idea to use a diplexer to combine signals from an H aerial with that from a V aerial. A switch would be the thing to use. (Nobody ever suggested that this would be a good thing to do.)

The more I think about it it seems that my H aerial may also pick up V signals as well. If that is the case I wonder what has happenned in the last few days to stop this happening. Perhaps the H and V signals have been made identical???
I could get paranoid over this !!!
jamie
Sunday 24 February 2013 5:54PM Portsmouth
ROY BARTON-

There is no reason to combine a HP and VP signal, although they are received differently they are outputting reception on exactly the same UHF settings.

Thus all you will be actually doing is combining 2 identical signals.


jb38
Sunday 24 February 2013 7:51PM
Roy Barton: With regards to the latter part of my reply and where I gave an example of a reverse situation to transmission involving the reception of H & V polarised signals from two aerials being combined in a diplexer and with reference to this in relation to the first paragraph of your latest posting, I did actually say >> a viewer receiving from "two" stations radiating on different polarities << and not two aerials of differing polarities being diplexed when receiving from the same bi-polarity station, something which I feel would be a pointless exercise anyway.

It has to be appreciated that when dealing with RF signals in any frequency band under that of microwave that "nothing" is exact once the signals have travelled via airspace, and so have to be looked at in a somewhat different way to that as though they were still contained "within" a transmitter station and being carried via trunking or cabling, as once an RF signal has left the mast this is where theory and practice generally starts to part company and elements of educated guesswork is the order of the day in attempting to solve any reception problem, but of course based on knowledge of the range of variables that is likely to apply, as the problem with remote diagnosing of reception difficulties is that the only way of assessing the situation is by feedback supplied by the viewer and so the more info supplied the better!

That said though, nothing can really beat an on site visit armed with a quality signal meter and a test aerial of the medium sized log periodic type so that the levels indicated are not being biased by the characteristics of the aerial, as well as it being beneficial for other bits and pieces to be at hand to either boost or reduce the signal level dependant on the location in relation to that of the transmitter, as a number of physical checks can be carried out on an installation in the first stages of an on site visit that cannot really be done without exceptionally lengthy two way "questions and answers" postings being involved.
jb38
Sunday 24 February 2013 7:57PM
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.
Roy Barton
Sunday 24 February 2013 8:33PM 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 ???
Roy Barton
Sunday 24 February 2013 10:28PM 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.
jb38
Monday 25 February 2013 9:18PM
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.


John
Sunday 3 March 2013 10:05AM
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.
KMJ,Derby
Sunday 3 March 2013 11:33AM
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.
Jamie
Sunday 3 March 2013 6:34PM Portsmouth
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
Carol
Monday 13 May 2013 6:05PM
I live in Bryanston, Dorset (DT11 area/Blandford). Since the digital switchover a few weeks ago, we have been receiving digital TV via Mendip very successfully. Now we cannot tune in any channels successfully, using Rowridge, Winterborne Stickland or Mendip. We have moved the TV aerial every which way to no avail. The signal strength/quality is particularly poor in the mornings but is often very good in the evenings, which makes no sense at all. We can't understand what's happened.
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