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Re: 56K Modems



On Mon, Jan 05, 2004 at 01:16:24AM +0100, Arnt Karlsen wrote:
> On Sun, 4 Jan 2004 21:52:57 +0000, 
> Pigeon <jah.pigeon@ukonline.co.uk> wrote in message 
> <20040104215257.GB30783@droitwichbox.dyndns.org>:
> > with), as long as you're in the right country; at least in the UK, the
> > frequency is legally required to average out to exactly 50Hz in a
> > 24-hour period. 
> 
> ..huh?  I thought the idea was to stick as close to 50Hz as possible?
> On having some heavy gear hop onto the grid, the load slows it to 
> say 49.99Hz, so promptly feeding more power onto the grid to bring 
> it back up to 50Hz, is done. But you brits have to hike it up to say
> 50.01Hz for a while "to catch up lost clock time"???  
> That too, is outside the 50Hz ideal.

It's wider than that... a +/-1% variation is allowed, ie. 49.5Hz-50.5Hz.
Nothing really bothers about such a variation... except in the bad old days
when record companies' mastering turntables were mains-locked, so you could
end up with LPs whose pitch was up to 1% out (a semitone is about 5.9%).

-- 
Pigeon

Be kind to pigeons
Get my GPG key here: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x21C61F7F

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