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Article #198

Re: Using an FM-Carrier for the Y [Luminance] Signal -- how to relieve the bandwidth issue?

#198
From: Green Xenon [Radium]
Date: Thu, 01 Nov 2007 19:31
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3999 bytes
Bob Myers wrote:

> "Green Xenon [Radium]" <glucegen1@excite.com> wrote in message 
> news:47295e0d$0$11519$4c368faf@roadrunner.com...
> 



>>Anyways, the QAM should be given the highest practical bit-resolution. 
>>1-symbol-per-second should be the baud.





> Fine,  but the question remains - what the hell is so important
> about "1 symbol per second"?  Why do you CARE?


I want to send the most information using the least bandwidth.



>>The minimum voltage should be set to 1.6e-19 volt. This is the voltage of 
>>one electron.





> Wrong.  Electrons have charge, expressed in coulombs, not
> voltage.  Go figure out the difference, and come back.

A charge can generate a voltage. An area with one free electron vs. a 
area with no free electrons has a difference of 1.6e-19 volt because a 
single electron has a negative charge of 1.6e-19 coulomb.




>>The bit-resolution should be high enough that each "level" is a difference 
>>of 1.6e-19 volt from the level above/below. A resolution of 8-bit allows 
>>for only 256 different levels -- obviously *way* too low.




> Way too low for WHAT?

Deciphering all those voltage levels with differences of 1.6e-19 volt 
and with 1.6e-19 volt being the lowest voltage and the maximum voltage 
being just low enough *not* to do any of the following to any extent:

1. Exceed the dielectric strength of any electronic component

2. Generate temperatures above 70 Fahrenheit in any electronic component

3. Ionize any electronic component

8-bits of resolution simply isn't *nearly* enough for this task.


>>The original Y signal is converted to QAM. This QAM signal is then 
>>broadcasted on an FM radio carrier wave whose base frequency is 300 Hz. 
>>300 Hz is the lowest ULF frequency and the lowest frequency used by 
>>telephones.




> Restating nonsense doesn't make it less nonsensical.  What does
> "QAM...on an FM radio carrier wave" MEAN on your planet?

A QAM signal in broadcasted on an FM radio wave. What don't you 
understand about this?


> The rest is just gibberish as well.

How so?
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Date: Thu, 01 Nov 2007 11:31:40 -0800
From: "Green Xenon [Radium]" <glucegen1@excite.com>
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Newsgroups: uk.tech.digital-tv,uk.tech.broadcast,sci.electronics.misc,ba.broadcast,alt.radio.broadcasting
Subject: Re: Using an FM-Carrier for the Y [Luminance] Signal -- how to relieve
 the bandwidth issue?
References: <46fc71d2$0$24285$4c368faf@roadrunner.com>   <u9hus4-6vi.ln1@radagast.org>   <4722f832$0$25703$4c368faf@roadrunner.com>   <ujr6i3dolk1qjon2ij5tta8aip26tff9qa@4ax.com>   <slrnfi6tb4.n9a.pm@thinkpad.nowster.org.uk>   <4723dde6$0$19659$4c368faf@roadrunner.com>   <1193758919.924634.276450@y27g2000pre.googlegroups.com>   <5op40sFnr30mU1@mid.individual.net> <1193769738.441836.79230@k35g2000prh.googlegroups.com> <lISdnTog1rjMCrranZ2dnUVZ8vydnZ2d@pipex.net> <4727a189$0$19640$4c368faf@roadrunner.com> <fgb5ae$6da$1@usenet01.boi.hp.com> <47295e0d$0$11519$4c368faf@roadrunner.com> <fgc1v0$rmh$1@usenet01.boi.hp.com>
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