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From: Cursitor Doom <cd@notformail.com>
Newsgroups: sci.electronics.design
Subject: Re: A Complex Metaphysical Conundrum
Date: Thu, 11 Apr 2024 18:49:40 +0100
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On Thu, 11 Apr 2024 11:58:02 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:

>"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?

They're students so of course they don't do anything useful.