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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 11:58:02 -0400
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"Cursitor Doom" <cd@notformail.com> wrote in message 
news:76nf1j9j04rknbh5kgta74nteeeht3303n@4ax.com...
> On Wed, 10 Apr 2024 21:10:59 -0400, "Edward Rawde"
> <invalid@invalid.invalid> wrote:
>
>>
>>"Cursitor Doom" <cd@notformail.com> wrote in message
>>news:cs4e1j5ohhb7fpcmnft14ad6pv66jtvi34@4ax.com...
>>> On Wed, 10 Apr 2024 18:18:21 -0400, "Edward Rawde"
>>> <invalid@invalid.invalid> wrote:
>>>
>>>>"Cursitor Doom" <cd@notformail.com> wrote in message
>>>>news:i52e1j9ctjqi1k1m9ej1aid2493foetnsq@4ax.com...
>>>>> On Wed, 10 Apr 2024 16:11:39 -0400, "Edward Rawde"
>>>>> <invalid@invalid.invalid> wrote:
>>>>>
>>>>>>"john larkin" <jl@650pot.com> wrote in message
>>>>>>news:v6sd1j1sr89ntc214dku5u5e04pks5toud@4ax.com...
>>>>>>> On Wed, 10 Apr 2024 15:57:55 -0400, "Edward Rawde"
>>>>>>> <invalid@invalid.invalid> wrote:
>>>>>>>
>>>>>>>>"Cursitor Doom" <cd@notformail.com> wrote in message
>>>>>>>>news:c6hd1jdjimga6ifo7b0kv7bqfj9750lbk3@4ax.com...
>>>>>>>>> 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.
>>>>>>>>
>>>>>>>>Changing a signal level can be thought of as multiplying the signal 
>>>>>>>>by
>>>>>>>>a
>>>>>>>>constant.
>>>>>>>
>>>>>>> You can change something by adding, too.
>>>>>>>
>>>>>>
>>>>>>I haven't looked at it in detail but a bit of playing with a search
>>>>>>engine
>>>>>>finds the question here:
>>>>>>https://broadbandlibrary.com/wise-and-mighty-decibel/
>>>>>>
>>>>>
>>>>> Jeez, when I said, "No Googling" I didn't seriously think anyone here
>>>>> would be dumb enough to need to actually do so! :-D
>>>>
>>>>I don't see any mention of any search engine in your first post.
>>>>
>>>>I tend to agree with John Larkin on this.
>>>>
>>>>If a student can use a meter to see that a signal which was 3 somethings
>>>>is
>>>>now 5 somethings (depending on what is being measured) then I give them 
>>>>a
>>>>pass.
>>>
>>> So going back to the orginal question as stated, you're saying the
>>> statement in quotes is *correct* then. Nice to have a straight answer.
>>
>>If you mean that do I think that something increases by 2 when it goes 
>>from
>>3 to 5 then yes that seems reasonable to me.
>
> I'm afraid that's not exactly the question, though.
> Here's what was asked again:
>
> Q: Is this statement correct: 'The signal level at the modem input
> increased by 2dBmV going from +3dBmV to +5dBmV.'
>
> You've already nailed your colours to the mast with your opinion that
> the statement is correct. Are you happy with that or would you like to
> change your mind?

What's wrong with the mind I already have?

My opinion is in my first reply to you.

Do the students who take this exam do any practical work or just sit in 
class?

>
> I'll be posting 'the answer' in about 5 hours' time for those who have
> yet to stick their heads above the parapet and might be tempted to
> participate. It's been a bit deafeningly quiet so far. ;-)
>
>>
>>You can also multiply it by 5/3 to get the same effect if you want. I 
>>don't
>>mind.
>>