~Moved my aerial 360 degree `s and im picking up DTT everywhere!

Im living in the North of Galway and ive been playing with Aerial today in the hope I might pick up some NI freeview! (you never know!)

Anyway to cut a long story short every way I turned my aerial including a full 360 degree I was picking up the Irish DTT signal all around me.

Sure they were different freq, but the signal came in at around 70 - 100 % all the time.

I think I must have picked up 4-5 transmitters all around me.

However i didnt get any NI freeview signals, much to my shame.

snaps

Yes im pointing towards truskmore and have noticed that ch 22, ch 48, ch 52, ch 53, ch 58 are all active.

Ch 22 is Castlebar
Ch 48 Is Maghera
Ch 53 is Truskmore

Thats the thing with digital that was never the case with analogue.

A lot of tv's auto tune dtt by default [you can turn that setting off usually]and constantly update channel lists - so you will always see what dtt channells from different transmitters are available.
There used be analogue versions of these that in their analogue form were either too weak for you to bother with or you just always tuned in the clearest one.
When you get a dtt channel at all regardless of how weak it is,it will always be as clear as the strongest one [that you are supposed to tune to or used to tune to in analogue] as long as it's signal is steady and of good quality.




Also as I posted in another thread,that means that people in the East who never used bother looking for channels that visit in fine weather from the UK are now see'ing them automatically and going what the fcuk??
They used be there weakly in analogue in these conditions before but people never knew.

Also often when they used appear in analogue anyway,they used be too weak to view or barely watchable but at the same strength in digital they are within the threshold for tv's to decode them

As you know when you get dtt,you either have it or you don't so it's crystal clear which means when channels visit,people sit up and take notice.
Hence now all the recent threads/posts in this forum saying "wow I've got UK freeview today".

watty

Weaker signals will be blockier though and much worse on rapid movement if VBR when signal is still quite above the intermittent "freezing". Because of how digital works you never get the more noticeable "snow" (noise) or "patterning/herring bone" (interference) or "ghosts" (multipath or reflections interference). The "blockyness is only noticeable if your screen is bigger, or you more aware of picture quality, or signal is near the point where it freezes.

Digital vs Analogue is a bit like FM vs AM
FM is clear, then hissy, then Breaks up then gone. The intermediate stage (Hiss on FM) on DAB is "bubbling Mud" effect and on Digital it's pixelation/blockyness and eventually periodic freezing. You see it on poorly aligned Sky dish in rain especially in West on non-2D channels as they are weaker.

AM is often noisy and simply gets noisier till you can't make it out, no sudden transitions. Analogue TV uses a form of AM for video, FM for mono and Digital for Stereo. If signal is not good enough for digital Audio, it switches to mono FM audio. Since the video is essentially AM, you see every noise and interference blemish like you hear on AM Radio. Analogue Satellite used FM video hence either perfect picture, varying amount of sparklies (exactly like Hiss on FM Radio) and then nothing. Digisenders and other Video senders are almost identical to Analogue Satellite (FM video) with also like Analogue Satellite multiple sound using separate FM audio subcarriers (Unlike Stereo on FM radio or Stereo on Terrestrial TV).

Peter Henderson

However i didnt get any NI freeview signals, much to my shame

Well, maybe after DSO you might be able to get Brougher.