Disruption on RTÉ 1 analogue.

endakenny

There has been disruption to transmission of RTÉ 1 analogue on my TV set at home in Cavan. Most recently, transmission cut out for 5 seconds during Fair City. What is causing this disruption? Have other viewers experienced this disruption on analogue?

glimmerman123

endakenny wrote: »

There has been disruption to transmission of RTÉ 1 analogue on my TV set at home in Cavan. Most recently, transmission cut out for 5 seconds during Fair City. What is causing this disruption? Have other viewers experienced this disruption on analogue?

RTE NL now have a notice up on Aertel saying that the current high pressure is causing disruption to RTE ONE analogue. That might be the problem.

endakenny

Thanks, glimmerman123.

Ronnie Raygun

glimmerman123 wrote: »

RTE NL now have a notice up on Aertel saying that the current high pressure is causing disruption to RTE ONE analogue.

Where is RTE1 analogue mentioned specifically?

glimmerman123

Ronnie Raygun wrote: »

Where is RTE1 analogue mentioned specifically?

It doesn't mention RTE ONE specifically i just presumed it meant RTE ONE as i usually get co channel interference when strong high pressure is present and RTE ONE analogue gets affected the most.

Ronnie Raygun

That message on Aertel is mainly aimed at those who are experiencing interference from UK transmitters & mostly concerned with Saorview reception I would think.

The breaks affecting the OP are something else.

The Cush

endakenny wrote: »

There has been disruption to transmission of RTÉ 1 analogue on my TV set at home in Cavan. Most recently, transmission cut out for 5 seconds during Fair City. What is causing this disruption? Have other viewers experienced this disruption on analogue?

If it's weather related this is an interesting piece from the ukfree.tv website

High pressure causing channel loss through "Inversion"

High pressure does not just bring cold at this time of year, it is causing quite random loss of Freeview and analogue reception.

Published on 14th March 2012 at 23:00 by Brian Butterworth

There is high pressure over the whole of the UK at the moment, and this causes the Inversion Effect. This is causing people to be missing a single Freeview multiplex, or have terrible analogue reception on a single channel. The problem may come-and-go or last for several days.

http://www.ukfree.tv/fullstory.php?storyid=1107051977

Ronnie Raygun

From the piece on ukfree:

The digital television signal uses a format called COFDM (coded orthogonal frequency division multiplexing) and this incorporates the ability to ignore reflected digital signals

Is he referring to the distant transmissions as "reflected digital signals"?

The ability of COFDM to ignore reflections only applies to delayed versions of the same transmission (multipath). Other digital signals on the same channel just add noise to the wanted signal & once the SNR is reduced enough, reception will be lost.

The Cush

Ronnie Raygun wrote: »

Is he referring to the distant transmissions as "reflected digital signals"?

If you post the question over on the website he should clarify.

blackius

Ronnie Raygun wrote: »

From the piece on ukfree:

The digital television signal uses a format called COFDM (coded orthogonal frequency division multiplexing) and this incorporates the ability to ignore reflected digital signals

Is he referring to the distant transmissions as "reflected digital signals"?

The ability of COFDM to ignore reflections only applies to delayed versions of the same transmission (multipath). Other digital signals on the same channel just add noise to the wanted signal & once the SNR is reduced enough, reception will be lost.

I presume rtenl engineers are finding out more and more moreso lately with tests on this as more of the Uk switches?
Anecdotally from digital spy posters in the early switch over regions of the Uk,there have been many surprises discovered with how cofdm has ACTUALLY performed (relative to original expectations) with services traveling much further, people getting the wrong itv region,pembrokeshire homes getting rte instead of freeview etc etc
You work for/connected with rtenl /saorview in my considered opinion so I expect and respect your posts to be amongst the better informed around here on what's going on at the coal face.

OddJobz

really should be quite grateful if reception dipped for whole of half hour during fair city..as is mainly poo