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From: "Edward Rawde" <invalid@invalid.invalid>
Newsgroups: sci.electronics.design
Subject: Re: A Complex Metaphysical Conundrum
Date: Thu, 11 Apr 2024 15:08:44 -0400
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"Cursitor Doom" <cd@notformail.com> wrote in message 
news:qjbg1jh7baj22i618rcafvo80rcgcm7ojn@4ax.com...
> On Thu, 11 Apr 2024 14:33:45 -0400, "Edward Rawde"
> <invalid@invalid.invalid> wrote:
>
>>"Cursitor Doom" <cd@notformail.com> wrote in message
>>news:ar1g1jdn81s994gd5brslvrrlns8jrtq13@4ax.com...
>>> On Wed, 10 Apr 2024 18:02:50 +0100, Cursitor Doom <cd@notformail.com>
>>> wrote:
>>>
>>>>Gentlemen,
>>>>
>>>>This is an exam question that trips up even some of the best students.
>>>>See what you make of it!
>>>>
>>>>Q: Is this statement correct: 'The signal level at the modem input
>>>>increased by 2dBmV going from +3dBmV to +5dBmV.'
>>>>
>>>>Your pal, CD.
>>>
>>> Okay, here's the answer you've been waiting for from some guy on the
>>> internet in this record-low participation quiz. This URL takes you
>>> directly to the relevant section to save time:
>>>
>>> https://youtu.be/jOVa4xJSLiA?list=PLl-kpmJ-_T4DMeDalokqXz7u-ReHZi08p&t=1466
>>>
>>> So it turns out that John, Edward and myself were all wrong and only
>>> Jason and Jeroen were right! And the proof is right there in the
>>> video.
>>>
>>>
>>
>>I don't see any proof of anything in the section of the video you posted.
>>I didn't watch the entire video.
>>Maybe you should post the proof for this example in text and ask why a 30
>>minute video is needed if a few lines of text is enough.
>>DOCSIS isn't my field but I would have thought that the average cable 
>>modem
>>could report whether or not it's happy with the signal levels.
>>The ISP/Cable company I use ripped the cable and phone lines out and put
>>fibre to the home into the small town I live in about a year ago.
>>So DOCSIS is history here.
>>
>
> Sorry, sarcasm doesn't come across very well at all via this medium!
> John knows what I mean as we're both veterans here. I actually agree
> with you. The question itself is just plain stupid if the answer
> suggests that two absolute quantities added together cannot make an
> absolute total.

Pompous twit might be going a bit far but that's what came to mind while I 
watched a few minutes of the video.
The guy with the headphones seems embarrassed.

I did manage to find this
https://www.scte.org/standards/library/catalog/scte-270-mathematics-of-cable/
I'll add it to my collection of pdfs I've had a quick look through but never 
read.