Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Cursitor Doom Newsgroups: sci.electronics.design Subject: Re: A Complex Metaphysical Conundrum Date: Wed, 10 Apr 2024 22:50:01 +0100 Organization: A noiseless patient Spider Lines: 37 Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Injection-Date: Wed, 10 Apr 2024 23:50:04 +0200 (CEST) Injection-Info: dont-email.me; posting-host="72402197c520d2e3eac0674605690949"; logging-data="1288978"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19JnYgjuxTU11TwlqlLck0KagWMmD9Y6jc=" User-Agent: ForteAgent/8.00.32.1272 Cancel-Lock: sha1:19uUVY5EV9yI3j1ltNtSK9dMpQA= Bytes: 2439 On Wed, 10 Apr 2024 16:11:39 -0400, "Edward Rawde" wrote: >"john larkin" wrote in message >news:v6sd1j1sr89ntc214dku5u5e04pks5toud@4ax.com... >> On Wed, 10 Apr 2024 15:57:55 -0400, "Edward Rawde" >> wrote: >> >>>"Cursitor Doom" 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 From the site you pointed to: "This kind of statement is incorrect, because signal levels cannot increase or decrease in increments of dBmV, only dB." Well you learn something new every day on the net, doncha? ;->