Band pass filters -- what am I missing?
 

Richard Tobin wrote:
Why do TVs not let you simply choose a transmitter? There's an
identifier in the signal somewhere, because I've seen it displayed.

(I'll get in quick, before Mark et al get back from their pre-Sunday lunch
pints ... ).

The identifier is for a transmitter *group*, not an individual transmitter.
So although I want to receive from Ilchester Crescent, the identifier still
says 'Mendip'.

André Coutanche

Band pass filters -- what am I missing?
 

David wrote:

How much is a filter just to keep CH22 out of a band B area?

How strong is channel 22, in absolute terms and relative to the weakest
wanted channel? If there is a lot weaker, simply using a broadband
attenuator may be enough.

And can one get one at a retailer as we not all in the trade.
I did have a friendly Trade supplier but he sold out to a National
company and are now strictly trade only.

Band pass filters -- what am I missing?
 

In article , André Coutanche
wrote:
Richard Tobin wrote:
Why do TVs not let you simply choose a transmitter? There's an
identifier in the signal somewhere, because I've seen it displayed.

(I'll get in quick, before Mark et al get back from their pre-Sunday
lunch pints ... ).

The identifier is for a transmitter *group*, not an individual
transmitter. So although I want to receive from Ilchester Crescent, the
identifier still says 'Mendip'.

Which of course leads to the "Why, Oh Why?..." question...

Why didn't they give each individual TX its own ID and allow the user to
tell the box to scan for a specified ID?

Too late now, I guess.

I also find it a PITA to 'rescan', so only do so when I find I need it to
access something. In my case I have three items. With each I have to
either:

A) Do an 'auto' scan with the antenna lead unplugged to blank the existing
info. Then do a 'manual' scan for each target channel.

or

B) Do an 'auto' with the antenna only pligged in during a carefully chosen
part of the scan.

B is quicker if I get it right. But A may end up being faster if I can't
judge B correctly.

It would be nice if a box did a scan and showed the user where there were
duplicates of mux and offer them a choice of which to assign the correct
'logical' channel numbers. But none of the ones I have do anything like
that.

Slainte,

Jim

--
Please use the address on the audiomisc page if you wish to email me.
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html
Audio Misc http://www.audiomisc.co.uk/index.html

Band pass filters -- what am I missing?
 

In article ,
Richard Tobin wrote:
In article ,
Mark Carver wrote:

Welcome to the world of hight power overlapping DTT. Folk in the
Manchester, Liverpool, and Bristol Channel areas (to name but three)
have been struggling with this problem for a while.

Why do TVs not let you simply choose a transmitter? There's an
identifier in the signal somewhere, because I've seen it displayed.

not really. I believe that (for instance) all Welsh transmiiters call
themselves 'Wenvoe'.

--
From KT24

Using a RISC OS computer running v5.16

Band pass filters -- what am I missing?
 

This is what you get when a designer is not a person living in the real
world of the general public.

Brian

--
Brian Gaff -
Note:- In order to reduce spam, any email without 'Brian Gaff'
in the display name may be lost.
Blind user, so no pictures please!
"Alan" wrote in message
...
In message , John Rumm
wrote

If the box supports manual scan... and of those that do, some have an
annoying habit of erasing all the stored channels each time you manual
scan. Hence you can only tune one mux.

And some boxes only add channels to the list when you scan so you first
have to reset to get rid of the previous scan information prior to new
scan.


--
Alan
news2009 {at} admac {dot} myzen {dot} co {dot} uk

Band pass filters -- what am I missing?
 

In article ,
Jim Lesurf wrote:
In article , André Coutanche
wrote:
Richard Tobin wrote:
Why do TVs not let you simply choose a transmitter? There's an
identifier in the signal somewhere, because I've seen it displayed.

(I'll get in quick, before Mark et al get back from their pre-Sunday
lunch pints ... ).

The identifier is for a transmitter *group*, not an individual
transmitter. So although I want to receive from Ilchester Crescent, the
identifier still says 'Mendip'.

Which of course leads to the "Why, Oh Why?..." question...

Why didn't they give each individual TX its own ID and allow the user to
tell the box to scan for a specified ID?

Not so easy when the 'transmitter' is a transposer.

--
From KT24

Using a RISC OS computer running v5.16

Band pass filters -- what am I missing?
 

On Sunday, August 28th, 2011 at 14:49:07h +0100, Brian Gaff explained:

This is what you get when a designer is not a person living in the real
world of the general public.

Are you suggesting that designers of some digital converter boxes are not
people or that they live on another world?

Do they all commute to work on this world from Tralfamadore?

Band pass filters -- what am I missing?
 

On Sun, 28 Aug 2011 13:53:05 +0100, Jim Lesurf wrote:

Why didn't they give each individual TX its own ID and allow the user to
tell the box to scan for a specified ID?

In fact each multiplex from each individual transmitter does have
its own unique identity in any one geographical area -- the UHF
channel on which it is transmitted.

So one solution for "auto scan" would be to prompt the user to
enter the UHF channel name to be added to an editable list of
channels to be automatically scanned each time the "auto scan"
function is activated.

I also find it a PITA to 'rescan'

The problem being the loss of favorites if you have any.

Band pass filters -- what am I missing?
 

In article , J G Miller wrote:

So one solution for "auto scan" would be to prompt the user to
enter the UHF channel name to be added to an editable list of
channels to be automatically scanned each time the "auto scan"
function is activated.

There must be numerous ways that lists of channels for each
transmitter could be provided in a compatible way, for example over
MHEG.

-- Richard

Band pass filters -- what am I missing?
 

J G Miller wrote:
On Sun, 28 Aug 2011 13:53:05 +0100, Jim Lesurf wrote:

Why didn't they give each individual TX its own ID and allow the user to
tell the box to scan for a specified ID?

In fact each multiplex from each individual transmitter does have
its own unique identity in any one geographical area -- the UHF
channel on which it is transmitted.

So one solution for "auto scan" would be to prompt the user to
enter the UHF channel name to be added to an editable list of
channels to be automatically scanned each time the "auto scan"
function is activated.

That's fine, until the UHF channel allocations change ! I'm afraid not even
those can be taken for granted to remain the same, if you can work out what
they are in the first place ! Ofcom data often doesn't match Digital UK's, so
whose do you trust ? It's all a shambles quite honestly.

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

www.paras.org.uk