DTT Mt Leinster, Ch45 blocking Presely in the South East

Our man in Havana

LOL!

watty

Oddly I do get TV3 on Ch45.


Analogue in Limerick.
39 = RTE1, 42 = RTE2, 49 = TG4

watty

watty wrote: »

Oddly I do get TV3 on Ch45.


Analogue in Limerick.
39 = RTE1, 42 = RTE2, 49 = TG4

really? or are you referring to the analogue ch45 which you are recieving three on? still think ill do a scan

watty

watty wrote: »

Oddly I do get TV3 on Ch45.


Analogue in Limerick.
39 = RTE1, 42 = RTE2, 49 = TG4

Would dtt at mt leinster on 39 be strong enogh to trouble 39 in limerick?

Deleted User

Deleted User wrote: »

Would dtt at mt leinster on 39 be strong enogh to trouble 39 in limerick?

if uk DTT was being recieve far into the midlands a few days ago - it would make sence that mt leinster could be recived in limerick - whether it would act as interferrence is another question but if they are being broadcast of the same frequencies then i would say it would - thats probably why its on ch45 here (besides the point of them trying to block welsh DTT) and ch39 in limerick

mike65

No TV3 here (no loss admitedly)

watty

Ch39, 42, 45 and 49 are the Analogue channels in Limerick.

There is only a narrow strip of Woodcock receiving Limerick that would get Mt Leinster, and its only rural higher spots. The two paths are at 90 deg approx. The likelyhood of co-channel interference is about Nil.

The city is well shielded in Mt Leinster direction being mostly at sea level. Woodcock Hill is actually in Co. Clare but quite close to the City. Much clearer path to Limerick County than most of Clare.

Woodcock Digital
47 41 44 51

Looks to me like 44 is in use only for DTT
I think pointing an aerial SW I'm getting weak DTT on 45.

Just Analog spectrum analyser.

razor_ryan

warlikedave wrote: »

if uk DTT was being recieve far into the midlands a few days ago - it would make sence that mt leinster could be recived in limerick - whether it would act as interferrence is another question but if they are being broadcast of the same frequencies then i would say it would - thats probably why its on ch45 here (besides the point of them trying to block welsh DTT) and ch39 in limerick

Which area's were getting UK DTT far into the midlands ?

razor_ryan

razor_ryan wrote: »

Which area's were getting UK DTT far into the midlands ?

it was a rarity - because of the high pressure over the British Isles - i heard it was being recieved in Waterford and a friend in tip was getting it but it disappeared

jabarrett35

High pressure is back and it's not only 1021mb and ch45 strenght is down too 30% and poor quality this co channel interference is a mare!

Antenna

watty wrote: »

Woodcock Digital
47 41 44 51

Looks to me like 44 is in use only for DTT
I think pointing an aerial SW I'm getting weak DTT on 45.

Just Analog spectrum analyser.

Its on Ch 47 (682 MHz) , not 44.
I checked last weekend at a location that can get it.

watty wrote: »

I think pointing an aerial SW I'm getting weak DTT on 45.

SW = South West ?

As well as Mt Leinster, Spur Hill also uses 45 for PSB Mux, but that would be South from you, not South West?

watty

Spur Hill is south, but invisible. Big stuff blocking it. Mullaganish is a bit west of south.

Checked my calibration, Tonight anyway Woodcock DTT is approx 690MHz, so if that's 47 and not 44, then the weak channel is 48?

I'm getting a weak DTT exactly next channel up, peaks at SW (South West). So who is ch 48? (if local is ch47). I've only an analogue spectrum analyser, no DTT at present. Next up looks like Analogue TV, I can see v.strong Video, audio and Nicam, so that must be TG4 on Woodcock @ ch 49

Antenna

watty wrote: »

I'm getting a weak DTT exactly next channel up, peaks at SW (South West). So who is ch 48? (if local is ch47). I've only an analogue spectrum analyser, no DTT at present. Next up looks like Analogue TV, I can see v.strong Video, audio and Nicam, so that must be TG4 on Woodcock @ ch 49

Ch48 (690 MHz centre frequency ) is Maghera PSB Mux. Peaking SW ? possibly due to local reflection or use of wrong group aerial - (might have more pickup at the back when out of group )


see the centre frequency (far right) for DTT on UHF channels here:
http://www.digitalspy.co.uk/digitaltv/information/a12613/uhf-channel-and-frequency-guide.html

watty

I'd say a reflection as I get very poor Analogue Maghera.

It's a 435MHz Aerial, so seriously "out of group"

Motorised

Top and right aerials are 145MHz

I have some group B aerials but the motor won't take more weight

Mr McBoatface

I meant to post this earlier but forgot. I was preforming a channel rescan at around midday using DVBDream. As normal I was receiving channel 45 (666000Khz) with the normal 80% signal level and 100 signal quality, however something rather unexpected then happened. I received the test transmission on a completely new channel/frequency, channel 61 (794000Khz). The signal strength/level was identical to that I get from channel45, I re-ran the scan about 5 minutes later and it was still there.

However I since rescanned and the signal is gone on that frequency. I'm based in Athy in Kildare using a Televes DAT 75 pointing south towards mount Leinster in my loft. Is it possible the signal was a reflected signal from some other source or could Mt Leinster be planning a channel move to C61, how would that affect the freeview overspill on the eastcoast ?

argosy2006

rte 1 and 2 gone missing

Mr McBoatface

argosy2006 wrote: »

rte 1 and 2 gone missing

Yeah all gone here , it was working until about midnight, nothing on C61 either

jobyrne30

jobyrne30 wrote: »

I meant to post this earlier but forgot. I was preforming a channel rescan at around midday using DVBDream. As normal I was receiving channel 45 (666000Khz) with the normal 80% signal level and 100 signal quality, however something rather unexpected then happened. I received the test transmission on a completely new channel/frequency, channel 61 (794000Khz). The signal strength/level was identical to that I get from channel45, I re-ran the scan about 5 minutes later and it was still there.

However I since rescanned and the signal is gone on that frequency. I'm based in Athy in Kildare using a Televes DAT 75 pointing south towards mount Leinster in my loft. Is it possible the signal was a reflected signal from some other source or could Mt Leinster be planning a channel move to C61, how would that affect the freeview overspill on the eastcoast ?

That ch 61 is kippure

rte is off air on 45

lets hope they reappear on ch 39

Go on RTENL-you know you want to!

Mr McBoatface

The signal from Mount Leinster was back again this morning, not on C39 still on C45

Also I done another rescan today a picked up the Test transmission on channel 54 (738000Khz) any idea where this signal is coming ?

54 is the kippure three rock sdn transmission.
Kippure hopped back to 61 yesterday for the day-it's back to 54 again now firing little or nothing to it's south.

Boy the life of an RTENL engineer... must be tough!

jabarrett35

Hi the signal I am getting this on Ch 45 is very poor on one box and on my less sensitive TV no signal. It was fine last night though the signal strenght was only 50%. So I'm wondering have the reduced power or could it still be co channel interference even the high pressure is virtual gone.

presely is an unusual case.
It never has a steady signal.It is always either medium,Very low or very high.

It can get very high in advance of a weather front and then drop like a stone when it passes.

With irish weather then,if you are going to be prone to presely interference and have to rely on channel 45,you are fecked.
It's not just tropo that causes it.
It's peculiar to presely's location and the seapath to Wexford.

I doubt RTENL would believe you if you told them that but it is the case and always has been in wexford and clearly in your area aswell as you are so high overlooking the sea.

jabarrett35

Hi I emailed RTENL and just got a reply they say the have no intention of moving from Ch 45 any time soon. This was from a man who is an engineer.

"In relation to channel 45 it was selected as part of an international co-ordination process (ITU, ComReg, DCENR, BAI) and I’m afraid we are stuck with it for some time to come. "

Gerry Wicklow

jabarrett35 wrote: »

Hi I emailed RTENL and just got a reply they say the have no intention of moving from Ch 45 any time soon. This was from a man who is an engineer.

"In relation to channel 45 it was selected as part of an international co-ordination process (ITU, ComReg, DCENR, BAI) and I’m afraid we are stuck with it for some time to come. "

Yet again Big Brother has spoken. "We're right and feck yezz all! Who cares if it works or not we still get our licence fee.":mad:

Sponge Bob

Gerry Wicklow wrote: »

Who cares if it works

Antenna

watty wrote: »

It's a 435MHz Aerial, so seriously "out of group"

Motorised

Top and right aerials are 145MHz

How does your vertically polarised 2metre/145MHz Yagi on the right perform for receiving TV Band 3 and DAB!?

Sponge Bob

jabarrett35

jabarrett35 wrote: »

Hi I emailed RTENL and just got a reply they say the have no intention of moving from Ch 45 any time soon. This was from a man who is an engineer.

"In relation to channel 45 it was selected as part of an international co-ordination process (ITU, ComReg, DCENR, BAI) and I’m afraid we are stuck with it for some time to come. "

They are wrong you know.
If Comreg do their job properly and act on the widespread non receivability of ch45 in wexford,parts of waterford and wicklow.

Then it's as simple as them telling RTE,they are licenced on the group A channels available which by the way have also been internationally approved and coordinated.
There is No obstacle.

All that is required is the necessary Comreg paperwork.

I honestly think the only way this potential problem can be avoided and RTENL prevented from railroading Wexford and wicklow [and parts of waterford] viewers into it,is by contacting your local T.D

Explain in simple terms that RTE don't have to use ch45 but if they do,many 1000's of homes will be left with no service after analogue switch off and could your T.D lobby Comreg on your behalf to ensure this is fixed.

Sponge Bob

Your best bet is a series of PQs to Ryan from various TDs in all of Wexford Carlow Waterford and Wicklow whose constituents are faced with expensive and completely unnecesary aerial reconfigs because RTE will not bugger off 45 onto 39 which channel is equally co-ordinated.