[LINK] RFI: ADLS2+ Performance

TKoltai tomk at unwired.com.au
Tue Jul 10 19:53:02 AEST 2012

> -----Original Message-----
> From: link-bounces at mailman.anu.edu.au 
> [mailto:link-bounces at mailman.anu.edu.au] On Behalf Of Craig Sanders
> Sent: Tuesday, 10 July 2012 4:06 PM
> To: link at mailman.anu.edu.au
> Subject: Re: [LINK] RFI: ADLS2+ Performance
> On Tue, Jul 10, 2012 at 02:36:44PM +1000, TKoltai wrote:
> > The term "Signal to Noise Ratio" can and is used for many different 
> > purposes.
> *ALL* of which are related to information transmission or 
> extraction in one form or another.

Err, in my day it used to be related to the difference between the Truth
Newspaper and the Australian.
In today's parlance... A Story about Kardashian hairstyle versus an item
about an imminent ELE.

A negative Signal to Noise ratio would place the Kardashian story ahead
of the End of the world article.   (In someone's famous words, awaiting
the guillotine, "Who cares which side my part is on Madame.. I am about
to lose my head." [I think it was "a Monty Python Sketch...)

> contention ratios are not related to information 
> transmission. they're related to the supply and demand of resources.
> words and phrases have meanings, they're not just arbitrary 
> noises or letter-sequences. if they didn't, they'd have 
> extremely low or zero SNR and communication (in any form) 
> just wouldn't work.
> you can't just redefine them to suit your own idiosyncracies 
> without making it clear that you're using a novel or unique coinage.
> or, in other words:
> Information advances an intervening dictionary near the 
> controversial procedure. Nonsense breaks before a guest 
> slang. Information sweeps without the infant. The pedal 
> forces an oil beside a damaging curry. Does information steal 
> nonsense? Nonsense caps information against the landlord. 
> Information awaits the stone in the wood. Information cruises 
> into nonsense. Nonsense assumes the rush tragedy. Can the 
> architecture do an idiot? Information addresses the nastier 
> sarcasm. Information waves into a dilemma. Nonsense jackets 
> the major into a fume. Information zones nonsense beside the 
> relationship. Can nonsense rot below the wombat?
> craig

Oh, dear.. that last paragraph made sense to me (Except maybe for the
Wombat doodoo being called nonsense.)

Bit like Fernando's posting the random words of Deepak Chopra making as
much sense as the actual deep, well meant words of wisdom...

Which is a little bit like "Buzz words" when I was in school.  Five
columns of words and you had to make sentences by selecting a word from
each column.
Curiously regardless of selection, they always made sense, showing that
there are many many ways of truly saying nothing.

We could say I was thinking of standing as a free thinking independent
for the next elections... And was merely practising... 
Kook for office, Vote for none of the above.

Has a certain Jungian panache to it...
My apologies for playing with the language; I shall try to be less
oblique next time by the use of age appropriate punctuation...  i.e.:
;-) or perhaps a more modernistic version, like LOL.

P.S. - Try suggesting to a user of QAM switched Wire-less towers that
contention is not a function of information transmission. 
The two, Service provision and resource allocation is exactly (after all
the hardware issues,) what Signal to Noise is all about.
The more competition one has for appropriate frequency, the more filters
are implemented to release more frequency possibilities.

The higher the number of frequency permutations in a switch, the lower
the dB per channel.

A simple analogy would have 32 ISDN users on a PRI each one flat chat.
The airconditioner in the room is X BTU.
The Ambient Temperature (A) is Z.
The Max 4000 CPU ambient temperature safety cut-out (C) is Y.
The recommended maximum number of users on a Max TNT is 24.

Let us say one day the air conditioners aluminium fins are damaged by a
wayward half blind seagull. 
If then an increased number of users suddenly exceeds the safe operating
environmental conditions, this would result in overheating of the router
thusly, C = Y x 1.15.
To compensate, the TNT either responds slower to opening and closing
gates or shuts itself down to protect it's hardware.

But yes, normally, in pure 2D engineering only terms, without regard for
abnormal system load, or unusual unplanned for events, excluding QUAM
requirements and any other frequency dependent digital transmission
operational requirements, you would be correct in saying:  

> contention ratios are not related to information 
> transmission. they're related to the supply and demand of resources.


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