From: Stefan Jahn <stefan@gr...>  20130917 14:45:04

Hello, are you asking for noise in a bandwidth, right? For this purpose we have a receiver() equation, see english help on math functions... BR, Stefan. On Tue, September 17, 2013 3:17 pm, chloros wrote: > Hi qucs community, > > i was wondering if there is an easy way to calculate the root mean > square noise value from the spectral density if the simulation step is > non linear (logarithmic)? > > for linear scale it should be sth like this: > urms=sqrt(integral(abs(Unoise)^2)) > which (if i am correct) could be implemented as: > urms=sqrt((max(acfrequency)min(acfrequency))*avg(abs(Unoise.vn)^2)) > > however that does not hold for logarithmic scaled ACsimulations (i.e. > acfrequency logarithmic). anybody an idea for an easy solution or do we > have to fiddle with the logarithmic derivatives? > > Best regards! > > > >  > LIMITED TIME SALE  Full Year of Microsoft Training For Just $49.99! > 1,500+ hours of tutorials including VisualStudio 2012, Windows 8, > SharePoint > 2013, SQL 2012, MVC 4, more. BEST VALUE: New MultiLibrary Power Pack > includes > Mobile, Cloud, Java, and UX Design. Lowest price ever! Ends 9/20/13. > http://pubads.g.doubleclick.net/gampad/clk?id=58041151&iu=/4140/ostg.clktrk > _______________________________________________ > Qucshelp mailing list > Qucshelp@... > https://lists.sourceforge.net/lists/listinfo/qucshelp > 