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From: Jeroen Belleman <jeroen@nospam.please>
Newsgroups: sci.electronics.design
Subject: Re: A Complex Metaphysical Conundrum
Date: Fri, 12 Apr 2024 09:56:51 +0200
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On 4/12/24 08:15, Jasen Betts wrote:
> On 2024-04-11, Cursitor Doom <cd@notformail.com> wrote:
>> On Thu, 11 Apr 2024 06:38:30 -0000 (UTC), Jasen Betts
>> <usenet@revmaps.no-ip.org> wrote:
>>
>>> On 2024-04-10, 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.
>>>
>>> db is a logarythmic ratio. an increase from +3dBmV to +5dBmV is an increase by 2dB
>>> (not 2dBmV)
>>>
>>> Adding 2dBmV to +3dBmV will not get you +5dBmV because it's a
>>> logarythmic scale.
>>
>> The question does require a "correct/incorrect" answer. It's a binary
>> choice. Your answer is....?
> 
> My answer is still "db is a logarythmic ratio. an increase from +3dBmV to +5dBmV is
> an increase by 2dB"
> 

It's "logarithmic".

Jeroen Belleman