South Coast DIGITAL will interfere with Satellite?

Rippy

At the Clarion Hotel in Cork on Friday night South Coast celebrated their 21st birthday. 21 years since men first struggled up mountains with tractor batteries to give Cork folk TV form the UK.

More details on the Terrestrial forum

[ I can't delete this post as it would delete the Thread! -- Watty

However Rippy does not agree with the assertion the allocation should not be made, nor does Rippy agree it would cause interference]

Ulsterman 1690

CHELSEA TV (why??)

Either the rights were cheap or someone at SCTV is a fan ?

Rippy

Ulsterman 1690 wrote:

Either the rights were cheap or someone at SCTV is a fan ?

I guess Chelsea can well afford to give it away. Maybe they are going the way of Real Madrid TV and looking at FTA and FTV as a way of increasing the fan base?
Who knows, maybe MUTV will do the same, now that would be popular in Cork!

watty

If you are not into paying for "Sport TV" this is VERY expensive compared with Sky. And of course satellite when you cancel you still have all BBC, all ITV , Film 4 etc.

watty

It is in the MIDDLE of the satellite band, not 5GHz.

The 8 licensed frequencies will be: 11739.0 MHz,
11788.0 MHz, 11817.0 MHz, 11856.0 MHz,11895.0 MHz, 11934.0
MHz, 11973.0 MHz, 12012.0 MHz

http://www.comreg.ie/_fileupload/publications/ComReg0642.pdf

Write to Comreg (address and email in the PDF) quickly and complain.

Interested parties have until 5pm on Tuesday the 19th of September, 2006 to make
representations, in writing, on the proposed amendments, Representations made after
this deadline will not be considered. Please address representations in writing to:
Peter Moran,
Market Framework,
Commission for Communications Regulation,
Abbey Court,
Irish Life Centre,
Lower Abbey Street,
Dublin 1.
or by email to:
peter.moran@comreg.ie

Rippy

This thread was started in terrestrial by myself under the title "South Coast announce Digital Packages"
It was cross posted to satellite and the title changed. The thread continues on terrestrial. Please read on...

mikeym

They dont seem to have sky one in any of their packages

Chorus must be worried they charge €15 a month for only setanta sports ireland.

watty

The copy here is for those concerded to complain the comreg about the DEFINATE interference to Satellite Services.

telecinesk

Down in Budapest they have 11ghz tv service similar, you see a lot of dishes facing downwards for it. I cant remember off hand the url for the provider,

Nobody is whinging about interference. Anybody else in Buda confirm this?

TVDX

I sent an email.
Watty, what kind of interference will be likely?.
Is there specific channels or satellites which use those frequencies that are of note?.

Rippy

TVDX wrote:

I sent an email.
Watty, what kind of interference will be likely?.
Is there specific channels or satellites which use those frequencies that are of note?.

Check out the main thread and see why I beleive interference is unlikely

http://www.boards.ie/vbulletin/showthread.php?t=2054988944

watty

Potentionally any transponder near in frequency (Up to +/- 15MHz) could be affected. Symptoms would vary from very blocky picture during heavy cloud / ice crystal cover in sky (doesn't reduce terrestrial signal) to no reception at all as it is digital reception.

I'm a qualified Microwave Communications Engineer, so I think I'm voicing three issues from knowledge rather than opinion:

1) A likelyhood of interference. (obviously it might be a small number of cases, but one is too many)
2) It breaks International and European agreements that Ireland hasa signed up to.
3) Some day in the future SWCT & subscribers will have pain of it getting turned off, if allowed to start.

The Cush

watty wrote:

2) It breaks International and European agreements that Ireland hasa signed up to.

Ireland hasn't implemented the ECC Decision ERC/DEC(00)08 on the use of the band 10.7 – 12.5 GHz for broadcasting-satellite and fixed-satellite services.
Only 26 European Administrations have implemented or are committed to implementing the decision in 6 years, 3 will not be implementing the decision, the remaining 17 (incl. Ireland) are either reviewing or their position is unknown.

Comreg in its "Response to Consultation" odtr01/97 stated

While Ireland has not yet implemented the ERC Decision, the Director’s current understanding is, that implementing the ERC Decision would not be incompatible with licensing a 12GHz terrestrial television system.

telecinesk wrote:

Down in Budapest they have 11ghz tv service similar, you see a lot of dishes facing downwards for it. I cant remember off hand the url for the provider,

Nobody is whinging about interference. Anybody else in Buda confirm this?

If this is correct and with Hungary having fully implemented ERC/DEC(00)08 are they breaking an agreement they have signed up to?

watty

Besides 10.010 to 10.144 GHz is allocated for fixed terrestrial.

Why can't they get that?

Why should they get preferential treatment?

When was this spectrum offered?

Well we sold off our Satellite spot and don't have any satellite service at all, so I suppose why should the irish Government care about foreign services.

12.7+ GHz would not be a problem either.

But between 10.65 and 12.65 is nutty.

The Cush

watty wrote:

Besides 10.010 to 10.144 GHz is allocated for fixed terrestrial.

Why can't they get that?

Why should they get preferential treatment?

When was this spectrum offered?

Well we sold off our Satellite spot and don't have any satellite service at all, so I suppose why should the irish Government care about foreign services.

12.7+ GHz would not be a problem either.

But between 10.65 and 12.65 is nutty.

(previously posted here)

The original consultation took place in 2001.
odtr0169 Licencing Regional or Locally based Digital television Delivery - Consultation Paper
odtr0197 Licensing Regional or Locally Based Digital Television Delivery- Response to Consultation
Press Release 21.12.2001
(ERC/DEC(00)08 - ERC Decision of 19 October 2000 on the use of the band 10.7 - 12.5 GHz by the fixed service and Earth stations of the broadcasting-satellite and fixed-satellite Service (space-to-Earth) was the basis for the consultation)

Applications for use of the band between 11.7GHZ and 12.5GHZ were requested in 2004.
ComReg 0427 Digital Television Delivery Systems at 12GHZ, Guidance Notes for Applicants
SCTV were awarded the licence in Sept 2004, the document ComReg0642 only proposes a variation to the licence to add 3 extra frequencies to the 5 centre frequencies currently licensed (and updated roll out plan)

In the US a similar group of frequencies (12.2-12.7 GHz band) are used for Multichannel Video Distribution & Data Service (MVDDS) and were auctioned off in 2004 & 2005.
At the time of the consultation there were fierce objections by DBS operators DirecTV and EchoStar to the shared use of these frequencies.

Use of this band and SCTV licence application were discussed in this forum at the time of the odtr (comreg) consultation in 2001.
http://www.boards.ie/vbulletin/showthread.php?t=36273
http://www.boards.ie/vbulletin/showthread.php?t=35919

This sharing of satellite-terrestrial frequencies originally called North-Point, was developed in the early 90s by Austin, Texas based professional engineers, Carmen and Saleem Tawil and commercialized by Northpoint Technology.
In the US it is now called terrestrial Multichannel Video Distribution and Data Service (MVDDS) or sometimes Terrestrial Satellite.
The FCC selected an independent engineering firm in 2001 to perform an analysis to determine whether the two services (terrestrial / satellite) could share the band without harmful interference to DBS systems. The FCC selected The MITRE Corporation to carry out this work. The frequencies were were auctioned off in 2004 & 2005.

In Europe the technology (hypercable) is provided by http://www.mds.fr/ to SCTV here Ireland and operators in France, Spain, Iceland, Slovenia, Andorra and other countries worlwide.

The Cush

watty wrote:

Well we sold off our Satellite spot and don't have any satellite service at all, so I suppose why should the irish Government care about foreign services.

If my memory is correct I dont think we sold our satellite spot (5 DBS frequencies, high power and D-MAC - I think) @ 31 degrees west???, didn't we lose it by default because we didn't place a satellite there.

Was the licence won by Denis O'Brien??? for Eire Sat or Atlantic Sat??? pre-Esat.

I think we shared the location with the UK and Spain.

The UK launched the Marcopolo satellite and British Satellite Broadcasting (BSB) later to merge with Sky Television to become BSkyB.
Did the UK use our 5 frequencies for Marcopolo 2???

Well all history now.

jmcc

The Cush wrote:

If my memory is correct I dont think we sold our satellite spot (5 DBS frequencies, high power and D-MAC - I think) @ 31 degrees west???, didn't we lose it by default because we didn't place a satellite there.

Was the licence won by Denis O'Brien??? for Eire Sat or Atlantic Sat??? pre-Esat.

The frequencies were allocated by WARC-77 I think. And the specs for satellite receivers then were nothing like the specs of the average satellite receiver when DTH became a reality. I think it was Stafford's Atlantic Sat operation that won the licence but without the technology it was useless.

I think we shared the location with the UK and Spain.

And a few others I think.

Did the UK use our 5 frequencies for Marcopolo 2???

Yes. BSB had a technologically superior system but was run by a bunch of ex-BBC and advertising assholes who had no idea of how to compete with Murdoch's Sky TV operation. All history now but it was fun at the time.

Regards...jmcc

telecinesk

BSB was fun alright, i had a receiver working on it years ago,now its a paperweight!
In Budapest, you see a lot of houses with 2 dishes, one facing almost to the ground and one as a normal dish usually on 4W Amos.
I would be suprised if after 10 or 12 years of this service here somebody has noticed any bad satellite reception all of a sudden.

watty

All the DMAC systems were doomed though, as they wrongly assumed there was plenty of bandwidth, there would only be about 20 channels.

FM PAL used nearly 20% less bandwidth and could work without a SCART. DMAC, D2MAC etc were hybrid analog uncompressed digital (B&W picture and digital colour and sound on one version).

Digital finally killed it of (D2MAC in Scandinavia). It didn't help payTv that they used a rubbish encryption scheme.

The Cush

Did a little research on Ireland DBS Satellite position at 31 degrees West
(Also discussed here previously)

The frequencies allocated to Ireland by WARC-77 were
Channel 2 11747 mhz
Channel 6 11823 mhz
Channel 10 11900 mhz
Channel 14 11977 mhz
Channel 18 12054 mhz

Channel Polarisations - RHC
Slot shared with UK, Spain, Portugal, Iceland
http://www.selkirkshire.demon.co.uk/analoguesat/dbsfreqs.html

In 1985 the Government entered into negotiations with Atlantic Satellites

On 18 September 1985 the Minister for Communications announced that the Government had decided, in principle, to enter into negotiations with Atlantic Satellites plc, 15 Kildare Street, Dublin 2, with a view to concluding an agreement to allow that company to construct and put into place the necessary satellite infrastructure and hardware which will enable this country to take advantage of direct broadcasting by satellite.
http://www.oireachtas-debates.gov.ie/D/0361/D.0361.198511140007.html

Hughes Corporation were also part of the consortium

17. Mr. Leyden asked the Minister for Communications if he will outline the benefits of entering into a contract with Atlantic Satellites-Hughes Corporation for the provision of direct satellite broadcasting...
http://www.oireachtas-debates.gov.ie/D/0362/D.0362.198512180020.html

Atlantic Satellite were awarded the frequencies

Mr. J. Mitchell: The company with whom negotiations have been conducted concerning the provision of an Irish satellite network is Atlantic Satellites Limited of 20 Lower Hatch Street, Dublin 2.
http://historical-debates.oireachtas.ie/D/0369/D.0369.198611060023.html

Mr. R. Burke: In December 1986 the then Minister for Communications on behalf of the Government, gave a commitment to issue a licence to Atlantic Satellites Limited to provide an Irish satellite network which would utilise the five direct broadcasting by satellite frequency assignments and geostationary orbital position allocated to Ireland by international agreement. The licence would issue when the company has become irrevocably committed to construct and launch the satellite network. The original commitment to issue a licence expired at the end of 1987. Having considered the case made by the company I granted an extension of time, initially to the end of 1988 and again to the end of 1989, to allow the company to continue their marketing efforts. The company therefore are continuing in their efforts internationally to find users for the proposed satellite capacity but at this point in time no concrete proposals have emerged.
http://www.oireachtas-debates.gov.ie/D/0387/D.0387.198903070022.html

The matter was again raised during a debate in the Seanad in late 2002 in relation to the Flood Tribunal.
(Flood Tribunal launches full inquiry into Atlantic Satellites Sunday Business Post)

Atlantic Satellites Limited was Struck Off on 19 Dec 2003


Denis O'Briens Esat were also bidding for the licence

The name Esat - said to be an abbreviation of "Éireann Satellite" and connected to O'Briens bid for Irelands communications satellite licence under the 1977 ITU frequency plans...
http://en.wikipedia.org/wiki/BT_Ireland

Decibel

In Europe the technology (hypercable) is provided by http://www.mds.fr/ to SCTV here Ireland and operators in France, Spain, Iceland, Slovenia, Andorra and other countries worlwide.[/QUOTE]

This informations are false SCTV do not purchase and do not deploy any Hypercable from www.mds.fr SCTV informations are lies on thi web site and the previous recently closed http://www.iolfree.ie/~icdg/sctv_mmds.htm:eek:

SCTV use Hypercable by MDSi to make tests and to obtain the Comreg Licence and also use MDSinernational refernces technologies and succesfull stories to collect money.:D

All of this story are in the hands of Peter Morand COMREG :mad: peter.morand@comreg.ie

watty

I'm not sure I quite follow what you are saying, Decibel, but no doubt you will clarify it over the next few days.

We do know that SCTV has been making various promises and claims for maybe 5 years now. Hopefully you will help us clarify what exactly is happening.

Decibel

watty wrote:

I'm not sure I quite follow what you are saying, Decibel, but no doubt you will clarify it over the next few days.

We do know that SCTV has been making various promises and claims for maybe 5 years now. Hopefully you will help us clarify what exactly is happening.

This are another SCTV eogorman WEB site relating to Hypercable MDSI technology tested from 2000 to 2006 in Carrigaline:
http://myhome.iolfree.ie/~icdg/sctv_mmds.htm:D
Hypercable MDSI help strongly SCTV to obtain the licence usig special Square cosecant TX antennas and special channel offset with another QPSK modulation than the satellite, also using a special software making a prediction to know terrestrial locations with potential risk of interferences with satellite users.:mad:

But devices and deployment are NOT from MDSi with the Hypercable technology :rolleyes:

Decibel

watty wrote:

I'm not sure I quite follow what you are saying, Decibel, but no doubt you will clarify it over the next few days.

We do know that SCTV has been making various promises and claims for maybe 5 years now. Hopefully you will help us clarify what exactly is happening.

SORY but also this previous adress
are closed now, but this can still be see on IRISH Cable pages:
see Google:


SCTV Technology - [ Traduire cette page ]SCTV Digital - Technology MMDS Hypercable System ... MMDS Hypercable uses a different set of wavebands to QAM MMDS. It uses the frequency wavebands from ...
myhome.iolfree.ie/~icdg/sctv_mmds.htm - 15k - En cache - Pages similaires


SCTV Digital preview - [ Traduire cette page ]The MMDS system they intend to use - MMDS HYPERCABLE (R) - differs in ... Here we will preview the proposed Digital MMDS service to be offered by SCTV. ...
www.iolfree.ie/~icdg/sctv.htm - 13k - En cache - Pages similaires


news - [ Traduire cette page ]SCTV have applied to use a system known as MDS Hypercable (see the ICDG feature on the subject) to transmit a limited 40-channel Digital MMDS service in the ...
www.iolfree.ie/~icdg/news_231201a.htm - 13k - Résultat complémentaire - En cache - Pages similaires


Southcoast Digital Licence Application [Archive] - boards.ie - [ Traduire cette page ]Main point, Madman: SCTV's chosen technology is not MMDS, does not rely on ... However, my understanding is that the Hypercable system involves very low ...
www.boards.ie/vbulletin/archive/index.php/t-36273.html - 24k - En cache - Pages similaires


Southcoast Digital Licence Application - boards.ie/vbulletin - [ Traduire cette page ]Have SCTV ever had an MMDS network ? AFAIK , they only re - broadcast on UHF . ... However , my understanding is that the Hypercable system involves very ...
www.boards.ie/vbulletin/showthread.php?t=36273 - 102k - Résultat complémentaire - En cache - Pages similaires
[ Autres résultats, domaine www.boards.ie ]






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You are in --> ICDG --> -Cable & MMDS --> SCTV Digital --> Technology



SCTV Digital - Technology
MMDS Hypercable System



Well, what is the system that SCTV intend to use to provide their digital TV system. At first, it seemed as if a digital deflector system would be basically DTT - indeed, we at ICDG reported that (erronously as it turned out) at the time.

In fact the system developed by MDS International (MDSI) - MMDS Hypercable - is, in fact, a variant on the traditional "QAM" Multipoint Microwave Distribution System currently in use here by Chorus and NTL. (Something, that, for obvious reasons to do with marketing and politics, SCTV deny - they call it "terrestrial satellite" instead - but that's a contradiction in terms). MMDS Hypercable uses a different set of wavebands to QAM MMDS. It uses the frequency wavebands from 1.7-60 GHz, in the FM band. It allows up to 130 analogue or 2000 digital channels, although SCTV are for various reasons planning to use rather less than this - fifty digital channels. According to MDSI, a single transmitter can cover a radius of 200 km - easily covering SCTV's coverage area in Counties Cork, Kerry, and Waterford. MDSI also claim that the signal can be reflected by "a mirror, or a piece of metal, or a tree", you don't need to have a line-of-sight to the transmitter - unlike traditional MMDS. Also the head-end equipment is apparently rather cheap - equipment possibly costing thousands rather rather than millions of pounds. For the viewer, the equipment will cost ?85 and include an LNB (Low Noise Block) fitted to your rooftop aerial and a Digital Set Top Box. Some people in exceptional circumstances will however need a 35cm digital minidish, simular to analogue MMDS aerials.

Technical documentation for MMDS Hypercable is available at MDSI's website at www.mds.fr

HyperCable? Transmitter Technical Specifications
HyperCable? may transmit any type of frequencies or modulation from 2.5 to 60 Ghz, but the basic system uses frequencies in the satellite band from 10.7 to 12.5 Ghz. This enables any satellite receiving set to process the signal, provided that the L.N.B. gain is adapted to the high power of the transmitter, in order to avoid transmodulation problems. Modulations are FM and QPSK.
Frequency : 3.4 GHz to 4.2 GHz and 10.7 to 13.25 GHz
Energy Dispersion Signal
70 MHz Filter : 24 MHz @ 1 dB
Maximum IF Attenuation < 10 dB (between cable and head)
If Filter to the Head : Included
Transmitter Power : 0.250W(23dBm)- 1W(30dBm)- 4W(36dBm)- maximum 5w
DVB Standard
Modulation type : QPSK
TX pulse shaping : Square-root raised cosine roll-off factor =0.35
Symbol rate : Ds= 2 to 30 Mbauds
Outer code : RS (204, 188, 8)
Interleaving : Convolutional, depth I=12
Inner Code : Convolutional, K=7, R=1/2 to 8/9
Energy Dispersion : IESS 309 following DVB standard
Data Rate (MPEG-2) : D=2xDs x R x (188/204) Mb/s (Up to 60 Mb/s )
Input Interface : MPEG-2 DVB LVDS Parallel (ASI, RS422 optional)
Serial Interf. (optional) : CCITT, G703 (HDB3)
Config. / Monitoring : Front panel, RS 232 and Ethernet
Direct Test Access : I & Q, symbol clock, IF
Input voltage : 48 VDC (85V to 264V AC )
Power Consumption : 85 W
Operating T? Range : +5?C to +45?C
Humidity : 85 %
Modulator Size and Weight : 19", 4U cabinet 20 kg
SHF Head size and Weight : 28 x 25 x 16 cm, 2kg

John1000

According the comreg web site the system is DVB-MS. Anyone here have a
first-hand review of the picture quality etc..?

watty

Picture quality will depend on source quality and compression and how the signal is converted.

The point Decibel is making is that what SCTV is deploying *MIGHT* bear no resemblence to the Comreg spec, as the MDSi system is proprietary.

The Cush

watty wrote:

The point Decibel is making is that what SCTV is deploying *MIGHT* bear no resemblence to the Comreg spec, as the MDSi system is proprietary.

ComReg0428 Technical Conditions For the Operation of Digital Television Delivery Systems between 11.7 GHz and 12.5 GHz requires the licence holder

6 System Standards
6.1 Transmission Standard
The relevant transmission standard is specified in EN 300 748

ETSI EN 300 748 is DVB-MS (Multipoint Video Distribution Systems (MVDS) at 10 GHz and above)
http://www.dvb.org/technology/standards_specifications/transmission/dvbms/index.xml

DVB-MS and DVB-MC

DVB has developed two complementary systems for digital multipoint distribution; DVB-MS, based on the DVB-S satelite delivery system, and DBV-MC, based on the DVB-C cable delivery system.

Both systems make use of microwave frequencies for direct distribution of services from a central point to viewers' homes. DVB-MS uses frequencies above 10 GHz. DVB-MS signals can be received with a DVB-S satellite receiver equipped with a small frequency converter instead of a satellite dish. DVB-MC uses frequencies below 10 GHz. The signals can be received with a common cable receiver equipped with a suitable frequency down-converter.
http://www.telecomabc.com/d/dvb-mds.html

This MDSi press release states ...Hypercable, the “TNT (i.e. DTT) DVB-MS”, releases the radio relay area reserved to TNT (DTT) in UHF-VHF,...

Decibel wrote:

SCTV use Hypercable by MDSi to make tests and to obtain the Comreg Licence and also use MDSinernational refernces technologies and succesfull stories to collect money.

Thinking out loud here, maybe "SCTV used MDSi "Hypercable" DVB-MS compliant system for testing and evaluation of this transmission standard but has chosen another EN 300 748 DVB-MS system (as per the technical conditions of the licence) from another supplier for the commercial roll-out and maybe someone is not happy about this"

Decibel

Thinking out loud here, maybe "SCTV used MDSi "Hypercable" DVB-MS compliant system for testing and evaluation of this transmission standard but has chosen another EN 300 748 DVB-MS system (as per the technical conditions of the licence) from another supplier for the commercial roll-out and maybe someone is not happy about this"[/QUOTE]

DVB-MS are a mistake the system ETSI full name are DVB-MC/S;)

As per informations we have the transmitters do not comply the COMREG requirement about the genlock required for multiple carriers and oscillators and are not GPS genlocked by a common clock for all LO and use also low cost devices use in SMATV with conversion and not of course genlocked
but of course if any do not comply I think COMREG can make a control to see if all are compliant:eek:

About "Maybe someone is not happy about" probabely you are right, of course MDSi Hypercable are probabely not Happy to see SCTV using the world references of MDSi to collect the money of Irish citizens This are same to said give me your Money I purchase for you this Rolls Royce and in fine with your money I purchase only a Brabant . :rolleyes:

Decibel

The Cush wrote:

ComReg0428 Technical Conditions For the Operation of Digital Television Delivery Systems between 11.7 GHz and 12.5 GHz requires the licence holder

Do you need another package of documents about the Money collected ?

TCM Archives > Irish Examiner > 2004/11/16 > Digital television licence goes to community firm

Tuesday, November 16, 2004 :

FRONT | IRELAND | SPORT | WORLD | BUSINESS

---

Digital television licence goes to community firm

By Eoin English
A COMMUNITY-RUN company was given a licence yesterday to broadcast a new digital TV service across Munster.Cork-based South Coast Television (SCTV) will take on Sky and Chorus and said its initial 60-channel digital package will be between 10% to 15% cheaper than its competitors.

The SCTV service should be up and running by September 2005.

It will also include a dedicated local channel highlighting the work of community groups and will broadcast locally made programmes, managing director Eric Daly said yesterday.

He was speaking after the Commission for Communications Regulation (ComReg) granted the licence.

“Since we started the company almost 20 years ago we have delivered a quality television service to the southern community at a reasonable cost and have encouraged, promoted and assisted in the development of local community television.

“However television viewing is changing. Traditional UHF technology is becoming obsolete and has been superseded by digital technology,” Mr Daly said.

“With our new digital service we will be able to offer our subscribers more choice and control over what they watch. Importantly, due to improvements in technology, we will provide a greater choice of channels, with greater picture quality at a significantly lower cost than our multinational competitors.

“We are adopting a measured approach to rolling out our service but we hope to have customers connected by September 2005,” he said.

Work has already started on the rollout of the service.

System tests are under way and talks are advancing with a number of programme providers, Mr Daly said.

It will cost SCTV between €6 million to €8m to launch the digital service.

“The system is state-of-the-art technology which has been developed by a French Company MDS International of Lyon,” Mr Daly said.

“South Coast has collaborated with MDS for the last three years to tailor the system for the Irish market and the launch of the system in 2005 will herald the first such system in Europe.”

SCTV has been broadcasting since 1985.

The company charges €75 annually for its package of BBC1, BBC2, ITV and Channel 4.

It beams the services into 23,000 homes in Cork, Waterford and parts of Kerry.

Front | Back

The Cush

Decibel wrote:

DVB-MS are a mistake the system ETSI full name are DVB-MC/S;)

DVB-MC/S ???

From the ETSI website

DVB-MS EN 300 748 Multipoint Video Distribution Systems (MVDS) at 10 GHz and above

DVB-MC EN 300 749 Framing structure, channel coding and modulation for MMDS systems below 10 GHz

Decibel

The Cush wrote:

DVB-MC/S ???

From the ETSI website

Kun johtokunta on hyväksynyt ohjeen, sitä tarjotaan asiaankuuluvalle standardoijaelimelle, joita ovat ETSI (European Telecommunications Standards Institute) ja CENELEC (European Committee for Electrotechnical Standardisation). Siirtokanavina toimivat EBU/ETSI/CENELEC JTC (Joint Technical Committee), ITU-R, ITU-T ja DAVIC.
DVB-projekti on kehittänyt standardit kaikille eri medioille: Satelliitit (DVB-S), kaapeli (DVB-C), perinteinen TV-lähetys (DVB-T), moniosoitusjärjestelmät (DVB-MC/S),:) palveluinformaatiojärjestelmä (DVB-SI), yleinen salausjärjestelmä (DVB-CA) sekä yleinen käyttöliittymä suojatuille järjestelmille (DVB-CI).



다음의 검색어들이 하이라이트 되었습니다: dvb mc s
DVB-MC/S
Microwave Multipoint Video Distribution. :eek:

Exhibit 1 - DVB standards
Name Description
DVB-S Satellite broadcast system, including modulation and data formatting methods that can be used with any transponder, current or planned.
DVB-C As above for HFC cable systems.
DVB-T As above for terrestrial video broadcasting: DTTB.
DVB-MC/S As above for microwave Multipoint (MDS) video distribution systems.
DVB-SI Service information system, enabling the user to navigate through the DVB environment.
DVB-CA Common scrambling system.
DVB-CI Common interface for conditional access and other uses


DVB-MS

This standard has the following references:

Standard Ref: EN 300 748
Edition: 1.1.2
Multipoint Video Distribution Systems (MVDS) at 10 GHz and above

Of course I know I participate to do it... before retirement but near to far problems solutions, LDQPSK, STB Roll; Off filters for terrestrial use are missing also extra COMREG needs are missing in the specs.

TVDX

My reply from Peter Moran :

Thank you for your representation on our Information Notice 06/42 on
the
Proposed Variation to SCTV Digital Plc Programme Services Distribution
Licence.

Your representation seems to centre on your concern regarding possible
interference to the reception of satellite services in the transmission
coverage area of the SCTV Digital Plc network.

With any licences issued by ComReg, the operation of equipment will
have
to comply with a set technical conditions, the SCTV Digital Plc
Programme Services Distribution Licence is no exemption to this. A set
of technical conditions exist and are published on our website as
document 04/28. I draw your attention to section 10.3 of document 04/28
(Frequency Sharing with Direct to Home (DTH) Satellite Receivers) in
which a set of conditions are imposed on the operator to ensure it does
not affect satellite reception.

Regards,

Peter

Peter Moran
Spectrum Management Engineer - Broadcasting

Decibel

TVDX wrote:

My reply from Peter Moran :

Thank you for your representation on our Information Notice 06/42 on
the
Proposed Variation to SCTV Digital Plc Programme Services Distribution
Licence.

Your representation seems to centre on your concern regarding possible
interference to the reception of satellite services in the transmission
coverage area of the SCTV Digital Plc network.

With any licences issued by ComReg, the operation of equipment will
have
to comply with a set technical conditions, the SCTV Digital Plc
Programme Services Distribution Licence is no exemption to this. A set
of technical conditions exist and are published on our website as
document 04/28. I draw your attention to section 10.3 of document 04/28
(Frequency Sharing with Direct to Home (DTH) Satellite Receivers) in
which a set of conditions are imposed on the operator to ensure it does
not affect satellite reception.

Regards,

Peter

Peter Moran
Spectrum Management Engineer - Broadcasting

No interference to satellite are easy to do, of course terrestrial KU satellite band are existing and use by microwave links and by ENG before the DTH satellite existence; satellite installers know very well the way to prevent interferences but terrestrial mode require for a safe service no less of 40 dB of fade margin ( same a microwave link) and a lot of care to prevent multipath flat fading, selective fading and another raleigh problems.
also multiples repeaters are not the better solution when only SMATV L band converters are in use ( no clock or GPS synchronisation).

Better and reliable service to the MMDS users are very difficult to do than to prevent the "never see" interferences to satellite users.:rolleyes: