DTT reception - from perfect to unwatchable
 

The aerial has a grotty polar response and so close in will pick up all the
reflections from buildings and pylons and goodness knows what else. add in a
reduced direct signal, and maybe an overloaded mast head amp to really screw
up the cross mod performance and I'd imagine all sorts of things might be
going on.

Brian

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"larkim" wrote in message
...
On Jul 28, 10:58 am, "Bill Wright"
wrote:
"larkim" wrote in message

...

Analogue reception does look ghosty.

Yes it will with an XG10EW.


That's interesting - and given that it gives (according to the TV)
10/10 reception, does that mean that there *is* such a thing as a
digital aerial after all? i.e. if it gets perfect digital reception,
and inherently is likely to ghost on analogue?

Longshot: These aerials have a bad habit. The cap on the junction box
lifts
up (sometimes only a bit) and lets water in. The fault is really due to
the
installer not knowing that he needs to make double sure the cap is in
place.

Bill

Thank's for the pointer - certainly something to investigate.

I wrote that there was a tree in line of sight about 100m away. Is
that likely to cause any problems which are exacerbated by the rain?

Matt

DTT reception - from perfect to unwatchable
 

"larkim" wrote in message
...
On Jul 28, 10:58 am, "Bill Wright"
wrote:
"larkim" wrote in message

...

Analogue reception does look ghosty.

Yes it will with an XG10EW.


That's interesting - and given that it gives (according to the TV)
10/10 reception, does that mean that there *is* such a thing as a
digital aerial after all? i.e. if it gets perfect digital reception,
and inherently is likely to ghost on analogue?

No, I just mean that short wideband yagis are inherently not very
directional, especially near the lower end. However, since multipath is much
less of an issue for DTT than for analogue, it does occur to me that a great
aerial of yesteryear, the Jaybeam MBM46 (or 48, 70, or 88) might come into
its own nowadays. These aerials had really good gain but were hopeless for
ghosting.

Longshot: These aerials have a bad habit. The cap on the junction box
lifts
up (sometimes only a bit) and lets water in. The fault is really due to
the
installer not knowing that he needs to make double sure the cap is in
place.

Bill

Thank's for the pointer - certainly something to investigate.

I wrote that there was a tree in line of sight about 100m away. Is
that likely to cause any problems which are exacerbated by the rain?

If the signal really is obstructed by the tree (impossible to tell from the
ground and sometimes impossible to tell from the roof), then yes,
definitely.

Bill

DTT reception - from perfect to unwatchable
 

"Brian Gaff" wrote in message
om...
Is this the silly retainer bit of plastic that is too stiff and over time
pushes the lid off?. It may not look nice but tape is often needed on some
of the stiffer boxes. I've no idea who tests these things, but even in
the old days Antiference lids that kind of clicked on came off after some
temperature cycling.

I always used to put tape around these lids.

Bill