[mythtvnz] Help with terrestrial channels (non-MythTV)

[David Zanetti]

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On Mon, 2007-02-26 at 03:33 -0500, Bryan Ischo wrote:

> WTF is up with TVs in New Zealand?  Why can't they scan for channels in a
> way that makes sense?  Why are some channels duplicated on my TV?  Why do
> TVs here make it so difficult to set up a reasonable channel map?  Is my
> experience typical or am I just not understanding what's going on here?=20
> For once, something in the USA is simpler: terrestrial broadcasts in the
> USA are generally tuned to on the channel number that they broadcast on,
> and TVs "just work" when you do a channel scan.

I wrote a quick hack of an explanation here:
http://pvr.geek.nz/w/index.php/Analog_TV

The short version is:

New Zealand TVs don't use a hard mapping between channel numbers you
press and channel numbers as used to identify frequencies. The numbers
you press are nothing more than presets, like would be the case on some
radios.=20

You've got multiple copies of channels for two reasons:
(a) Autoscan sucks, and picks up distinct channels when it's just
slightly offset from a strong signal
(b) There are multiple distinct broadcast towers that offer the same
channel but from different frequencies

You're much better off to manually tune. For my Sony Trinitron, there's
a flap with a 'manual' button. Enter the channel slot you want to tune,
hit manual, then plus or minus and it'll seek, stopping at each strong
signal. Find the channel you want for that slot, hit manual again.
Repeat.

--=20
David Zanetti <dave2@wetstring.net>
http://hairy.geek.nz/

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