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.

Are there any planned engineering works or unexpected transmitter faults on the Rowridge (Isle Of Wight, England) mast?

No problems on any service. BBC


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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)

Is the transmitter output the same in all directions?

Radiation patterns withheld

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

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.

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



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
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.

Are there any self-help relays?

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

How will the Rowridge (Isle Of Wight, England) 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.

How do the old analogue and currrent digital signal levels compare?

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

Which companies have run the Channel 3 services in the Rowridge transmitter area

Aug 1958-Jan 1992Southern Television
Jan 1982-Dec 1992Television South (TVS)
Jan 1993-Feb 2004Meridian
Feb 2004-Dec 2014ITV plc
Feb 1983-Dec 1992TV-am•
Jan 1993-Sep 2010GMTV•
Sep 2010-Dec 2014ITV Daybreak•
• 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  ◊  Later commentsnext Latest commentslast

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.

Transmitter engineering
Monday 18 June 2012 11:28AM
ROWRIDGE transmitter - Over the next week Rowridge main transmitter: TV (digital) Liable to interruption, Radio (analogue) working normally, Radio (digital) working normally. [DUK] Over the next week Rowridge main transmitter: TV (digital) Liable to interruption, Radio (analogue) working normally, Radio (digital) working normally. [DUK]
charles hayter
Wednesday 20 June 2012 9:25AM Verwood
bh31 7df we are getting beakup on only bbc chanels through the day but seems to clear up in the evening but not always, never had any trouble before the switch over.still have old ariel no trouble on any other channel perfect picture.we also have a booster in the roof.charles, verwood dorset
Transmitter engineering
Wednesday 20 June 2012 10:29AM
ROWRIDGE transmitter - Freeview BBC Digital TV Weak Signal; DSO related from 09:31 yesterday HD Digital TV Weak Signal; DSO related from 09:32 yesterday [BBC] Over the next week Rowridge main transmitter: TV (digital) Liable to interruption, Radio (analogue) working normally, Radio (digital) working normally. [DUK]
Transmitter engineering
Wednesday 20 June 2012 10:29AM
ROWRIDGE transmitter - Freeview BBC Digital TV Weak Signal; DSO related from 09:31 yesterday HD Digital TV Weak Signal; DSO related from 09:32 yesterday [BBC] Over the next week Rowridge main transmitter: TV (digital) Liable to interruption, Radio (analogue) working normally, Radio (digital) working normally. [DUK]
Transmitter engineering
Wednesday 20 June 2012 11:28AM
ROWRIDGE transmitter - Freeview BBC Digital TV Weak Signal; DSO related from 09:31 yesterday HD Digital TV Off Air from 09:50 today to 09:56 today HD Digital TV Weak Signal; DSO related from 09:32 yesterday [BBC] Over the next week Rowridge main transmitter: TV (digital) Liable to interruption, Radio (analogue) working normally, Radio (digital) working normally. [DUK]
Transmitter engineering
Wednesday 20 June 2012 11:28AM
ROWRIDGE transmitter - Freeview BBC Digital TV Weak Signal; DSO related from 09:31 yesterday HD Digital TV Off Air from 09:50 today to 09:56 today HD Digital TV Weak Signal; DSO related from 09:32 yesterday [BBC] Over the next week Rowridge main transmitter: TV (digital) Liable to interruption, Radio (analogue) working normally, Radio (digital) working normally. [DUK]
Transmitter engineering
Wednesday 20 June 2012 2:27PM
ROWRIDGE transmitter - Freeview BBC Digital TV Weak Signal; DSO related from 09:31 yesterday to 12:56 today HD Digital TV Weak Signal; DSO related from 09:32 yesterday to 12:55 today HD Digital TV Off Air from 09:50 today to 09:56 today [BBC] Over the next week Rowridge main transmitter: TV (digital) Liable to interruption, Radio (analogue) working normally, Radio (digital) working normally. [DUK]
Transmitter engineering
Wednesday 20 June 2012 2:27PM
ROWRIDGE transmitter - Freeview BBC Digital TV Weak Signal; DSO related from 09:31 yesterday to 12:56 today HD Digital TV Weak Signal; DSO related from 09:32 yesterday to 12:55 today HD Digital TV Off Air from 09:50 today to 09:56 today [BBC] Over the next week Rowridge main transmitter: TV (digital) Liable to interruption, Radio (analogue) working normally, Radio (digital) working normally. [DUK]
Mark Fletcher
Wednesday 20 June 2012 6:04PM Barnsley
Charles Hayter,Verwood.
I would look up the posting below yours by Transmitter Engineering on Wednesday 20 June 2012 at 2.27pm.That could be one possibility.
The other possibility you mentioned is the booster in the roof.Try bypassing this.
Transmitter engineering
Thursday 21 June 2012 4:28AM
ROWRIDGE transmitter - Freeview BBC Digital TV Weak Signal; DSO related from 09:31 on 19 Jun to 12:56 yesterday HD Digital TV Weak Signal; DSO related from 09:32 on 19 Jun to 12:55 yesterday HD Digital TV Off Air from 09:50 yesterday to 09:56 yesterday [BBC] Over the next week Rowridge main transmitter: TV (digital) Liable to interruption, Radio (analogue) working normally, Radio (digital) working normally. [DUK]
Transmitter engineering
Thursday 21 June 2012 4:28AM
ROWRIDGE transmitter - Freeview BBC Digital TV Weak Signal; DSO related from 09:31 on 19 Jun to 12:56 yesterday HD Digital TV Weak Signal; DSO related from 09:32 on 19 Jun to 12:55 yesterday HD Digital TV Off Air from 09:50 yesterday to 09:56 yesterday [BBC] Over the next week Rowridge main transmitter: TV (digital) Liable to interruption, Radio (analogue) working normally, Radio (digital) working normally. [DUK]
Transmitter engineering
Thursday 21 June 2012 12:28PM
ROWRIDGE transmitter - Freeview HD Digital TV Off Air from 09:50 yesterday to 09:56 yesterday [BBC] Over the next week Rowridge main transmitter: TV (digital) Liable to interruption, Radio (analogue) working normally, Radio (digital) working normally. [DUK]
Transmitter engineering
Thursday 21 June 2012 12:28PM
ROWRIDGE transmitter - Freeview HD Digital TV Off Air from 09:50 yesterday to 09:56 yesterday [BBC] Over the next week Rowridge main transmitter: TV (digital) Liable to interruption, Radio (analogue) working normally, Radio (digital) working normally. [DUK]
Transmitter engineering
Friday 22 June 2012 4:28AM
ROWRIDGE transmitter - Freeview HD Digital TV Off Air from 09:50 on 20 Jun to 09:56 on 20 Jun [BBC] Over the next week Rowridge main transmitter: TV (digital) Liable to interruption, Radio (analogue) working normally, Radio (digital) working normally. [DUK]
Transmitter engineering
Friday 22 June 2012 4:28AM
ROWRIDGE transmitter - Freeview HD Digital TV Off Air from 09:50 on 20 Jun to 09:56 on 20 Jun [BBC] Over the next week Rowridge main transmitter: TV (digital) Liable to interruption, Radio (analogue) working normally, Radio (digital) working normally. [DUK]
Tim Collins
Friday 22 June 2012 11:09AM Brighton
Hello,
I'm hoping that somebody can shed some light on our occasionally serious Freeview reception problems...

To set the scene (with due apologies for any lack of tech-savvy!) we're in Brighton with a roof-mounted, powered-aerial supplying several RF points around the house. The aerial receives its signal from the Rowridge transmitter, signal from the nearby Whitehawk Hill transmitter being blocked from us by a high-rise building.

Switchover happened in March and generally speaking signal quality massively improved – prior to switchover it was so bad that I had to contact Digital UK to ask whether things would get better. However, occasionally we suffer from pixelation and drop-outs, and recently these have become so severe that watching television at these times is impossible.

When I look at the Rowridge transmitter's performance (when I can understand it) it always seems to be working normally, and in posting a message on the BBC's Reception Problems website, their comments in reply were solely aimed at my equipment. So presumably it's not the transmitter but rather something at my end?

We're using two of our RF points with (1) a Freeview TV and (2) a Sharp Freeview+ twin-tuner and a Panasonic DVDR. When the signal breaks up, it breaks up across everything.

Given that we've now had three instances of severe reception problems across the last fortnight I'm trying to identify possible causes, and if all the FV boxes are affected but the transmitter is AOK, then I'm guessing it must be our aerial? But we're talking an intermittent problem...

Given problems on the 7th June prompting my BBC web posting and their reply I've come over all train-spottery and I've started to log what's going on. Signal was appalling Sat 16 June between 20.00 & 22.00 when it was windy, but fine from 22.00 when the wind dropped to gusty, though patchy in the afternoon when it was sunny with a light wind. We suffered minor pixelation on 18/6 when there was no wind and the weather was fine. 21/6 was very windy and we lost signal between 19.30 and 22.15, after which the wind dropped a little and the signal was fine.

So is this wind-related? I can see that the aerial-pole is flexing in the wind, but they all are! Is wind-based aerial movement enough to wreck digital signal reception?

Your thoughts and suggestions would be most welcome.
Dave Lindsay
Friday 22 June 2012 1:41PM
Tim Collins: The first thing to do is check that your receivers are tuned (on all channels) to Rowridge, and not another transmitter such as Whitehawk. Being tuned to another transmitter could cause such intermittent reception as the aerial will be pointing the wrong way for signals being received. If this is the case, and you are relying on a tree to reflect the signal back to you, then when the wind blows the tree moves and hence affects your reflected signal.

Refer to this page for a list of multiplexes and services carried on them (those with a bullet in the "E"/England column): www.dmol.co.uk link icon DMOL Post-DSO Multiplex Channel Allocations

There are six multiplexes, so check one service from each to see what UHF channel (frequency) it is tuned to. (Previous analogue used one UHF channel per service.) Do this by bringing up the signal strength screen whilst on the service in question.

PSB1 | BBC One | RR=C24 | WH=C60
PSB2 | ITV1 | RR=C27 | WH=C53
PSB3 | BBC One HD | RR=C21 | WH=C51
COM4 | ITV3 | RR=C25 | WH=C57
COM5 | Pick TV | RR=C22 | WH=C56
COM6 | Yesterday | RR=C28 | WH=C48

RR=Rowridge, WH=Whitehawk

For example, go to ITV3 (number 10) and bring up the signal strength screen. It should say that you are tuned to C25 for Rowridge, but will be C57 if it's coming from Whitehawk.

If it turns out that you were tuned to Whitehawk for all or some multiplexes, and these were the ones causing the difficulty, then put the poor reception you experienced down to being tuned to the wrong transmitter.

Because Rowridge channels are low (in the 20s) and Whitehawk's are high (50s and 60), you can unplug the aerial lead at 30% through the automatic tuning scan to miss out Whitehawk.

If you were tuned to Rowridge whilst experiencing poor reception, then this could perhaps be co-channel interference from a transmitter on the Continent. In the days of analogue it was clear to see that another signal was interfering. When particularly bad, the other picture would be imposed over the one you're wanting to receive.

With digital, all you get is nothing. You "may" find that, where the signal strength screen indicates strength and quality, that you have a signal that is as strong as it is normally (might be worth making a note of strength on each multiplex when it's OK so you can compare) but with poor quality.

If the problem is on the COM multiplexes, then switching your aerial to vertical might help. Indeed, the likelihood of co-channel interference could be reduced where the interfering station broadcasts only horizontally.

Rowridge is the only main station that broadcasts horizontally and vertically. The horizontal component is primarily so as to work with existing aerials.

The PSBs are at a power of 200kW horizontally and vertically, whereas COMs are 50kW horizontally and 200kW vertically. One of the possibilities is that the marked difference in strength could be desensitising your receiver (so as to make it less sensitive to the weaker signals). For example, if your receiver is tuned to ITV3 on C25, it is therefore "looking" at C25. On C24 is a much stronger signal. When outside at night, and car headlights shine towards you, your eyes become less sensitive and therefore you are less able to see the darker surroundings until the car passes. This is obviously only a possible issue with receiving the three COMs from Rowridge.
ajsrdg
Friday 22 June 2012 8:06PM
Re "Do you want to change to HD event?"

See:
https://www.sony-europe.com/discussions/message/786514#786514
Tim Collins
Saturday 23 June 2012 11:43AM Brighton
Dave, thanks for your detailed reply.
Your explanation of multiplexes and the reduction to 6 representative UHF channels is very good and I can almost say that, for now, I get it!

I've taken a look at all three FV tuners to determine what UHF channels I'm getting. The TV is next to impossible to fathom, but the FV+ box and the DVDR are much easier to read, though they're offering slightly different strength and quality info...

Here's what the DVD reports...
MUX | Channel | UHF | strength | quality
PSB1 | BBC ONE | 24 | 10 | 10
PSB2 | ITV1 | 27 | 10 | 10
PSB3 | BBC1HD | | |
COM4 | ITV3 | 25 | 10 | 7
COM5 | Pick TV | 22 | 10 | 7
COM6 | Yesterday | 28 | 10 | 7

FYI, here's what the FV+ says
PSB1 | BBC ONE | 24 | 9 | 8
PSB2 | ITV1 | 27 | 9 | 8
COM4 | ITV3 | 25 | 8 | 8
COM5 | Pick TV | 22(+1) | 7 | 7/8
COM6 | Yesterday | 28 | 8 | 8

So this confirms that we're tuned to Rowridge. As this is effectively a problem free moment I'll save these numbers and see how they compare when we suffer issues.

It's interesting that you mention cross-channel interference – back in the analogue days we did suffer occasional ghosting, though I was never able to work out what might be appearing or where from...

Looking at what you've said whilst the problem may be interference, without knowing what station is interfering, in order to confirm their horizontal or vertical broadcasting, my switching to a vertical aerial may not necessarily fix the problem? Or have I got that wrong?

Reflection? That sounds like a can of worms!

I'd appreciate hearing your thoughts now we're a little clearer on where my signal is coming from.

Thanks again...
Dave Lindsay
Saturday 23 June 2012 11:47PM
Tim Collins: We can't be totally sure that this is co-channel interference. Even if the interfering signal were to be strong enough to show a picture, it won't because your receiver is waiting for the signal from Rowridge.

If you are tempted to rescan, then you "might" find a foreign multiplex on the channel that you are having difficulty. Obviously retuning isn't advised in such circumstances as it will leave you without the receiver tuned to what you want, so it's up to you.

The thing with inversion is that it isn't that the signal travels further, but that the signal which normally goes up into space gets bounced back down to earth:

www.ukfree.tv link icon High pressure causing channel loss through "Inversion" | ukfree.tv - independent free digital TV advice

This page might be of interest:

www.aerialsandtv.com link icon Rowridge Transmitter

This PDF lists transmitters in France:

tvignaud.pagesperso-orange.fr link icon http://tvignaud.pagespers….pdf

Most are horizontally polarised and those that are vertically polarised are low power ones, so won't be an issue with inversion. The "PAR" column gives the power in kW. R1 through to R6 and L8 are the multiplexes.

Having your aerial vertically polarised should help "rejection" of interfering horizontal signals.

Obviously get in a professional or at least someone who is proficient in going on the roof safely.


The reflection I was thinking of was that of Whitehawk, perhaps on another building reflecting back to your aerial (which faces the other way), although I said that without thinking that Whitehawk is vertical only and your aerial is horizontal, so that's unlikely.
samualgrist
Sunday 24 June 2012 11:25AM
Good post! The transmitter engineering works really impressed me much. I think it will help in detection of place, humidity, temperature etc. These information's are much needed for me. Thanks for the allocation. :lol:
Transmitter engineering
Monday 25 June 2012 11:29AM
ROWRIDGE transmitter - Freeview HD Digital TV Off Air from 09:50 on 20 Jun to 09:56 on 20 Jun [BBC]
Transmitter engineering
Monday 25 June 2012 11:29AM
ROWRIDGE transmitter - Freeview HD Digital TV Off Air from 09:50 on 20 Jun to 09:56 on 20 Jun [BBC]
Transmitter engineering
Monday 25 June 2012 12:28PM
ROWRIDGE transmitter - Freeview HD Digital TV Off Air from 09:50 on 20 Jun to 09:56 on 20 Jun [BBC] Over the next week Rowridge main transmitter: TV (digital) Liable to interruption, Radio (analogue) Possible weak signal, Radio (digital) working normally. [DUK]
Transmitter engineering
Monday 25 June 2012 12:28PM
ROWRIDGE transmitter - Freeview HD Digital TV Off Air from 09:50 on 20 Jun to 09:56 on 20 Jun [BBC] Over the next week Rowridge main transmitter: TV (digital) Liable to interruption, Radio (analogue) Possible weak signal, Radio (digital) working normally. [DUK]
Transmitter engineering
Tuesday 26 June 2012 10:27AM
ROWRIDGE transmitter - Over the next week Rowridge main transmitter: TV (digital) Liable to interruption, Radio (analogue) Possible weak signal, Radio (digital) working normally. [DUK]
Transmitter engineering
Tuesday 26 June 2012 10:27AM
ROWRIDGE transmitter - Over the next week Rowridge main transmitter: TV (digital) Liable to interruption, Radio (analogue) Possible weak signal, Radio (digital) working normally. [DUK]
Stu Seddon
Friday 29 June 2012 4:34PM Lymington
Is it normal for Lymington not to receive any of the Five channels?
My girlfriend needs her Home & Away fix :/
KMJ,Derby
Friday 29 June 2012 6:19PM
Stu Seddon: You should be able to receive the full set of Freeview channels. If you have ITV1 and C4 you should also have Channel Five as this is on the same mux, available from all UK TV transmitter sites after DSO, Additionally, if you can receive QVC you should have the remaining Channel Five group channels. Try a manual tune on C27 for D3+4, and C25 for SDN from Rowridge. If you have a non functioning Channel Five in the channel list, do a factory reset to clear the old data before retuning.
Snarf
Friday 29 June 2012 9:09PM
I guess the Rowridge engineering works are affecting Film4? It's disappeared off channel 15 and reappeared on channel 810 with a really weak signal.
KMJ,Derby
Friday 29 June 2012 9:36PM
Snarf: What do you now have stored in position fifteen of the channel list? I would suspect that the inversion effect could have been at work delivering out of area signals, unless an automatic retune took place which coincided with Rowridge being off the air, resulting in an alternative frequency being stored for ArqB.
Louis Lawrence
Wednesday 4 July 2012 12:24PM
Can anyone tell me whether it would be possible to broadcast a digital TV channel from the satellite or repeater station on St Boniface Down, Ventnor, Isle of Wight? OFCOM is a bit vague on this.
Transmitter engineering
Monday 16 July 2012 11:10AM
ROWRIDGE transmitter - Over the next week Rowridge main transmitter: TV (digital) working normally, Radio (analogue) Possible weak signal, Radio (digital) working normally. [DUK]
Transmitter engineering
Monday 16 July 2012 11:10AM
ROWRIDGE transmitter - Over the next week Rowridge main transmitter: TV (digital) working normally, Radio (analogue) Possible weak signal, Radio (digital) working normally. [DUK]
Taras
Wednesday 18 July 2012 1:39AM
Hi,

I've lost the COM6 mux completely, I'm in the bh23 area.

itv4 seemed to be choppy and in the last week or so it went completely.

Is it worth doing a swap from horizontal polarization to vertical ?
Keith
Friday 20 July 2012 5:09PM Worthing
I live in BN12 6QA with a roof top aerial pointing to Rowridge. I am experiencing occasional picture break up of varying severity on sky sports and other commercial channels through my BT Vision box. I was wondering if I should switch the aerial to vertical polarization or would this cause other problems with interference from France, or possibly the Midhurst Transmitter ? Many Thanks.
Jamie
Sunday 22 July 2012 6:10PM Havant
KEITH--------------

If you have a red tipped aerial which is grouped for rowridge, then you should not be getting interference from midhurst, only if you have a black tipped aerial which is wideband, would you receive interference from other transmitters.

Changing to VP for the aerial could cure your problems, however this is not always the case, although you need enough power for the signal to work correctly, you also need the quality of that signal to be good.

As an aerial installer I usually fit aerials now on VP, but have found the odd job that requires HP install.

So I would say give it a try and see if it helps.

information provided by JAYS CABLING SERVICES
jb38
Sunday 22 July 2012 7:18PM
Keith: If your aerial is still mounted horizontally then please note that the commercials only transmit on 50Kw on that mode whereas the vertically polarised transmissions are radiating on 200Kw.

By the way Midhurst cannot cause interference to signals from Rowridge as the latter spans channels from 21 - 28 whereas in the case of Midhurst its 50 - 62, and so if you do get interference at any time it has to be from somewhere else or possibly even from continental stations, your reception of commercials being much more susceptible to being interfered with as you are predicted as only being able to receive them with the status of variable even although they are radiating on 200Kw.
Barry Quinn
Sunday 22 July 2012 10:57PM
I have lost many of my Freeview channels from the Rowridge transmitter. All seemed to be ok till late last night 21 July..
jamie
Monday 23 July 2012 7:11PM Havant
BARRY-

what is your postcode and do you know if your existing aerial is running through an amplifier or splitter?
Trevor Rhodes
Tuesday 24 July 2012 4:49PM Poole
We are at BH13 7NH (Canford Cliffs), and receive our Freeview signal from Rowridge. We have a modern digital aerial professionally installed about 3 years ago. We have not needed to adjust it during or after the change over procedure.

However in the last week (approx since 19 July 2012) we have started to have problems receiving Sky News (82). It often breaks up and is sometimes no longer found when we do a retune.

So we have looked at signal quality for each of the 100+ channels using the facility on our Panasonic TX-P42G20B TV. We find that signal quality is perfectly fine (100%) for all channels except for the following 20 which are all about 30% - 40% quality level:
11
19
20
25
29
36
37
43
46
49
62
82
87
90
84
96
97
98
108
193
Do you suggest we have the aerial realigned towards the Poole transmitter, or is there a simpler method?
jamie
Tuesday 24 July 2012 5:09PM Havant
TREVOR RHODES

Hi, your poor signal seems to be on the commercial muxes.

The best thing to try first is to have the aerial tilted so that the elements are vertical as apposed to horizontal.

The reason for this is that they signal strength is stronger on VP setting rather than on HP setting.

The fact that all has been fine up until recently could also indicate that maybe something is being built in your signal path, causing your weak signal.

I would try altering the aerial first then go from there.

Information provided by

Jays Cabling Services
Digital Approved Installer

www.jayscabling.co.uk
Dave Lindsay
Tuesday 24 July 2012 5:10PM
Trevor Rhodes: Short answer: Have your aerial changed from horizontal to vertical.

Long answer: The Poole relay does not carry the Commercial (COM) multiplexes; only the Public Service Broadcaster (PSB) ones, so you would be worse off. Indeed, it is COM5 you are having issues with, and you may be susceptible to poor reception of COM4 and COM6 as well due to the clash with Stockland Hill.

For services and which multiplex they are carried on, see:

www.dtg.org.uk link icon DTG :: DTT Services by Multiplex

After switchover, digital signals from Rowridge are broadcast horizontally and vertically. The horizontal signals are there there for compatibility with existing aerials.

The PSBs (BBC, ITV1, ITV2, C4 etc) are at a power of 200kW horizontally and vertically, whereas the COMs are 50kW horizontally and 200kW vertically. The COMs are lower power horizontally because the three channels (frequencies) so that they can be used by other transmitters (in closer proximity than what the PSBs' channels are re-used).

In your case, you could be suffering from interference from Stockland Hill as its COMs use the same three channels. It is horizontally polarised only, so changing your aerial to vertical polarisation should help "rejection" of the unwanted signals.
M Brown
Tuesday 24 July 2012 7:01PM Poole
Poor signal on Freeview. Aerial in loft. Post code BH14 9NA Poole
jb38
Tuesday 24 July 2012 7:20PM
M Brown: Should this just have been fitted (as you haven't mentioned) then have you ensured that the aerial is mounted vertically and is facing 296 degrees if receiving from Poole @ 1 mile or alternatively 97 degrees if its Rowridge @ 25 miles, as indications are that you should be able to have good reception from both stations.
A J BEVAN
Wednesday 25 July 2012 3:57PM
My bbc 1 signal from Rowridge Ae has been off briefly the last 2days.Any Xmission reasons plese.Please comfirm Ae on Westcliff Bournemouth should be installed for best signals from Rowridge THank you.
Rachel
Wednesday 25 July 2012 9:36PM
Has anyone else experienced free view reception issues today? We have no problems at all with signal normally but today we have experienced a lot of interference. The picture is periodically blocky with a delay much like if you experience bad weather when using a sky signal.
Someone else suggested it could be related to air pressure, is this likely?
Solent-Viewer
Thursday 26 July 2012 9:55AM
I lost all Freeview channels last night towards 23:00hrs but they are back this morning. I have a new aerial vertically aligned at Rowirdge. Did the transmitter fail??
We had excellent analogue reception in Selsey before we opted for a Freeview DVB TV set and the new aerial, but have experienced digital reception problems ever since.
If this is progress they can keep it!! We pay our licence fee in advance and expect good reception every day.
jamie
Thursday 26 July 2012 7:19PM Havant
RACHEL

many things can cause problems with reception.

The key questions are:

is your aerial good
are the cables and connections good
do you have any splitters or amplifier
what area do you live in
are there specific channels that are not working

With all systems there can be problems from time to time

however all equipment can have a life span of about 20 years.

Just to confirm that Rowridge transmission has been perfect the last few days.

If you provide your location and system details I may be able to provide more information.

regards

Jamie
jamie
Thursday 26 July 2012 7:26PM Havant
SOLENT VIEWER

If you answer these few questions I may be able to help.

1. your location
2. does your system have an amplifier
3. how many connections on the system
4. age of aerial
5. when did your problems start
6. is the aerial mounted outside or in a loft

reception issues can be down to poorly sited aerials or connection and equipment issues.

regards

Jamie

Rachel
Thursday 26 July 2012 8:05PM
Jamie,

The problem seemed to fix itself by about 22:00 last night. I noticed there was a bit of interference earlier this evening but again it is back to normal.

I live in Southampton city center in a flat with a communal aerial (SO14). The building is about 5yrs old.
The cables and connections appear to be fine.
No splitters or amplifiers.

Itv 1, channel 4 and E4 were the worst quality signal.
Solent-Viewer
Thursday 26 July 2012 9:25PM
Jamie .. The aerial is only weeks old and was installed when we bought the new DVB TV set at the end of Feb this year. It was fine on analogue right up until switchover/off but often lost reception on digital. After full switchover the rigger came and changed polarity to vertical and digital became better on some of the channels but occasionally stuttered on ones such as Pick, Dave, Sky News and some others.
BBC 1,2,3,4 etc was fine until yesterday until all went off and again this evening with the whole lot going off at 21:00
The lead is direct from the aerial to the back of the set and is the same age as the new group A (red ended) aerial.
I called the aerial rigger this morning and left a message but as he has not bothered to reply I can only assume he does not want to sort anything out that is sortable.
If this is DVB than this is one viewer who will flatly refuse to pay his licence next year and it will be great to have my say in court ...GRRRRR!!!



Please post a question, answer or commentIf you have Freeview reception problems before posting a question your must first do this Freeview reset procedure then see: Freeview reception has changed, Single frequency interference, and Freeview intermittent interference.

If you have no satellite signal, see Sky Digibox says 'No Signal' or 'Technical fault'

If you have other problems, please provide a full (not partial) postcode (or preferably enter it in box at the top right) and indicate where if aerial is on the roof, in the loft or elsewhere.

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