A while ago at least one mux changed the data stream and this caused my old
Nokia 221T box to cease being able to make sense of some stations. (I think
the change was the code rate.)

Out of curiousity, this morning I did a complete rescan to see if this
would fix the problem. It did. But it has thrown up an odd result I've not
previously encountered!

As usual I did the rescan in two steps.

1) Unplug the antenna lead and then do an 'fresh install' auto scan. This
is th make the box forget all previous station details.

2) Plug in the antenna lead once (1) is complete. Then do a manual scan of
the selected UHF channels for the TX I want. 53, 54, 58, 60, and 61.

As usual this produced many crap channels as well as the ones we actually
watch. But I noticed that many of the rubbish channels are duplicated. This
despite my trying to only choose each MUX once, using the preferred TX.

I looked and the duplicates seem to come from UHF Channel 23. Which I
certainly did not scan manually. And step (1) resulted in the box telling
me '0 channels found' as usual.

The reported signal levels for these 'channel 23' versions are all well
below those from the scanned channel version of the same station.

The channels I'd 'lost' do now show up OK, although in some cases with a
displaced logical station number - e.g. 801 for 'Yesterday' and 799 for
'Russia Today'. But I've encountered the Nokia doing this before despite
the Panasonic recorder showing the values as per Radio Times. The results
are OK despite the odd numbers. However my real puzzle is the mystery of
having aquired 'channel 23'... Anyone explain this without assuming I
accidentally did scan 23 without noticing what I was doing?

Slainte,

Jim

--
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Seems odd, unless it has some kind of problem with low channels and scans
them anyway.
It might have been missed as a bug in London as its ITV analogue at the
moment.
Brian

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Brian Gaff -
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"Jim Lesurf" wrote in message
...
A while ago at least one mux changed the data stream and this caused my old
Nokia 221T box to cease being able to make sense of some stations. (I
think
the change was the code rate.)

Out of curiousity, this morning I did a complete rescan to see if this
would fix the problem. It did. But it has thrown up an odd result I've not
previously encountered!

As usual I did the rescan in two steps.

1) Unplug the antenna lead and then do an 'fresh install' auto scan. This
is th make the box forget all previous station details.

2) Plug in the antenna lead once (1) is complete. Then do a manual scan of
the selected UHF channels for the TX I want. 53, 54, 58, 60, and 61.

As usual this produced many crap channels as well as the ones we actually
watch. But I noticed that many of the rubbish channels are duplicated.
This
despite my trying to only choose each MUX once, using the preferred TX.

I looked and the duplicates seem to come from UHF Channel 23. Which I
certainly did not scan manually. And step (1) resulted in the box telling
me '0 channels found' as usual.

The reported signal levels for these 'channel 23' versions are all well
below those from the scanned channel version of the same station.

The channels I'd 'lost' do now show up OK, although in some cases with a
displaced logical station number - e.g. 801 for 'Yesterday' and 799 for
'Russia Today'. But I've encountered the Nokia doing this before despite
the Panasonic recorder showing the values as per Radio Times. The results
are OK despite the odd numbers. However my real puzzle is the mystery of
having aquired 'channel 23'... Anyone explain this without assuming I
accidentally did scan 23 without noticing what I was doing?

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

In article , Brian Gaff
wrote:
Seems odd, unless it has some kind of problem with low channels and
scans them anyway.

It hasn't done this before. And because of the crazy way DVB-T lets the
broadcasters move all the deckchairs at the drop of a hat I've lost count
of how many times I've done a rescan over the years.

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