This preview shows page 1. Sign up to view the full content.
Unformatted text preview: ﬁrst sidebands vanish when β corresponds to a zero of J1 (β ). The ratio of two contiguous tone frequencies
corresponds to the inverse ratio of the corresponding bessel function zeros, i.e. let fm,i = 491.5 Hz and
fm,i+1 = 712.7 Hz. Then
= 1.45 =
The two contiguous zeros with this ratio are βi = 10.1735 and βi+1 = 7.0156. Once the correspondence
between tone frequencies and Bessel function zeros has been established, the peak deviation is determined
using ∆fmax = βi fm,i or ∆fmax = βi+1 fm,i+1 . In either case, the result is ∆fmax 5000 Hz. 1-15 Solution 1a -...
View Full Document
- Spring '08