Commissioning new Blackhill transmitter
 

I drove past the now twin masts at Blackhill (Central Scotland). I
know the new mast is for DSO but I wondered if they will wait until
June to start using the new aerials or if they can make the transfer
early. I see that some of the new digital channels are the same as
the present analogue channels (which may provide the answer).

Does each channel have its own aerial (antenna) or do they all go
through the same aerial? If the former, does the size of the aerial
have to be matched exactly to the intended frequency?

Do you need a digital aerial to transmit digital as we all know by now
that you need a digital aerial to receive digital TV? :-)

Commissioning new Blackhill transmitter
 

"Scott" wrote in message
...
I drove past the now twin masts at Blackhill (Central Scotland).
I
know the new mast is for DSO but I wondered if they will wait
until
June to start using the new aerials or if they can make the
transfer
early. I see that some of the new digital channels are the
same as
the present analogue channels (which may provide the answer).

Does each channel have its own aerial (antenna) or do they all
go
through the same aerial? If the former, does the size of the
aerial
have to be matched exactly to the intended frequency?

Do you need a digital aerial to transmit digital as we all know
by now
that you need a digital aerial to receive digital TV? :-)



The transmitters are all combined at ground level and fed by
several cables to an aerial array which is designed to give power
gain - on a main site like Balck Hill either +10dB or +13dB.

The aerials are the same for both analogue and digital.


--
Woody

harrogate three at ntlworld dot com

Commissioning new Blackhill transmitter
 

On Sun, 2 Jan 2011 14:41:08 -0000, "Woody"
wrote:

"Scott" wrote in message
.. .
I drove past the now twin masts at Blackhill (Central Scotland).
I
know the new mast is for DSO but I wondered if they will wait
until
June to start using the new aerials or if they can make the
transfer
early. I see that some of the new digital channels are the
same as
the present analogue channels (which may provide the answer).

Does each channel have its own aerial (antenna) or do they all
go
through the same aerial? If the former, does the size of the
aerial
have to be matched exactly to the intended frequency?

Do you need a digital aerial to transmit digital as we all know
by now
that you need a digital aerial to receive digital TV? :-)



The transmitters are all combined at ground level and fed by
several cables to an aerial array which is designed to give power
gain - on a main site like Balck Hill either +10dB or +13dB.

The aerials are the same for both analogue and digital.

Sorry this is off-topic now but can anyone suggest a reason why my
post has disappeared and Woody's reply has created a new thread in my
newsreader (Agent)? A number of my postings have disappeared from
view but people are replying so they must see them.

PS Back on topic, why did Black Hill need a new transmitter when most
of the others have just been upgraded? Not complaining obviously
about the special treatement, just wondering.

Commissioning new Blackhill transmitter
 

Scott wrote:

can anyone suggest a reason why my
post has disappeared and Woody's reply has created a new thread in my
newsreader (Agent)?

Your post, Woody's reply and your reply to him are all visible here,
properly threaded.

Commissioning new Blackhill transmitter
 

On Sunday, January 2nd, 2011 at 14:57:27h +0000, Scott wrote:

Sorry this is off-topic now but can anyone suggest a reason why my post
has disappeared and Woody's reply has created a new thread in my
newsreader (Agent)?

You are posting to EternalSeptember and presumably reading from that
news server.

Since your post is present on that server because other people can see it,
the explanation is that something has messed up in the indexing and or
caching of articles by your newsreader Forte Agent.

I use Pan and occasionally month old or more articles appear as unread
because it has had a hiccough with its internal "database".

Commissioning new Blackhill transmitter
 

On Sun, 2 Jan 2011 15:27:57 +0000 (UTC), J G Miller
wrote:

On Sunday, January 2nd, 2011 at 14:57:27h +0000, Scott wrote:

Sorry this is off-topic now but can anyone suggest a reason why my post
has disappeared and Woody's reply has created a new thread in my
newsreader (Agent)?

You are posting to EternalSeptember and presumably reading from that
news server.

Since your post is present on that server because other people can see it,
the explanation is that something has messed up in the indexing and or
caching of articles by your newsreader Forte Agent.

I use Pan and occasionally month old or more articles appear as unread
because it has had a hiccough with its internal "database".

Thanks to you and Andy for helping to isolate the problem. What I
think I will try is to delete a few thousand posts and see if that
helps.

Commissioning new Blackhill transmitter
 

On Sun, 2 Jan 2011 14:41:08 -0000, "Woody"
wrote:



The transmitters are all combined at ground level and fed by
several cables to an aerial array

Cable or waveguide?

--
Cheers

Peter

Commissioning new Blackhill transmitter
 

Scott wrote:
I drove past the now twin masts at Blackhill (Central Scotland). I
know the new mast is for DSO but I wondered if they will wait until
June to start using the new aerials or if they can make the transfer
early. I see that some of the new digital channels are the same as
the present analogue channels (which may provide the answer).

They are likely to run some high power tests on the post DSO allocations from
the new mast and aerials overnight. Keep a look out between now and DSO for
the analogue services that are 'giving up' their allocations being scheduled
to be off the air overnight.

That's what happened at Wenvoe and Winter Hill (though those sites just had
new aerials, not permanent replacement masts), and the muxes were 'empty'
during the tests.

--
Mark
Please replace invalid and invalid with gmx and net to reply.

www.paras.org.uk

Commissioning new Blackhill transmitter
 

Brian Gaff wrote:
Trolling again..

The obvious answer is that normally one only is used, but of course to get
the polar responses required multiple aerials will be visible and phased to
get the desired effect.. Mybe!

Brian

Brian, a total change of subject. I'm writing something that touches on
the way blind people use television, and in particular the way analogue
switch-off is affecting them. I just wonder if you could offer any
insights, so to speak. I can't imagine what it must be like to be blind,
so I feel that I might be missing something obvious. Can you help?

Bill

Commissioning new Blackhill transmitter
 

On Sun, 02 Jan 2011 15:41:41 +0000, Scott wrote:

On Sun, 2 Jan 2011 15:27:57 +0000 (UTC), J G Miller
wrote:

On Sunday, January 2nd, 2011 at 14:57:27h +0000, Scott wrote:

Sorry this is off-topic now but can anyone suggest a reason why my post
has disappeared and Woody's reply has created a new thread in my
newsreader (Agent)?

You are posting to EternalSeptember and presumably reading from that
news server.

Since your post is present on that server because other people can see it,
the explanation is that something has messed up in the indexing and or
caching of articles by your newsreader Forte Agent.

I use Pan and occasionally month old or more articles appear as unread
because it has had a hiccough with its internal "database".

Thanks to you and Andy for helping to isolate the problem. What I
think I will try is to delete a few thousand posts and see if that
helps.

And then compact the database, if that's an option. Might be best to copy
the database(s) first, if that's not offered as a choice before compaction.
--
Peter.
The gods will stay away
whilst religions hold sway