Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
A couple of lines may not sufficiently explain this issue to you but this text should:
"From Amplitude Modulation to Frequency Modulation" **broken link removed**
The Deviation Ratio (DR) is defined as the ratio of the maximum deviation of the FM signal to the maximum modulating frequency.The DR for NBFM is restricted to values between 0.5 and 1.0. By holding the DR to such small values, only the carrier and the first sideband are of significant amplitude .. see picture below ..
When only one sideband and the carrier are transmitted, the NBFM signal occupies the same bandwidth as an AM signal ..
both will have upper and lower side band..if you look at the expression for both AM and Narrow FM ...they will differ from each other by means "sign" ( + or -) in the expression..
yet to be explored...
Is it NBFM or FM it doesn't matter. Both are frequency modulation. Difference is different modulation index or simply degree of modulation. At NBFM the modulation is "weak". And in this case the spectrums of FM and AM are similar. And that is a fact. You can prove it mathematically.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
