Patent ID: 8615170

Claim:
A method of controlling a timing state of a local oscillator ( 17 ) being synchronized by a timing signal (S T1 ) provided through one-way transmission from a remote master oscillator ( 6 ) through a dielectric waveguide ( 4 ), the method comprising the steps of: receiving ( 101 ) a first timing signal (S T1 ) modulated on a first electromagnetic carrier having a first carrier wavelength (λ 1 ) and transmitted through said dielectric waveguide ( 4 ); receiving ( 101 ) a second timing signal (S T2 ) modulated on a second electromagnetic carrier having a second carrier wavelength (λ 2 ) different from said first carrier wavelength (λ 1 ) and transmitted through said dielectric waveguide ( 4 ) together with said first timing signal (S T1 ); providing ( 102 ) a signal (S diff ) indicative of a difference between a transmission time (T 1 ) of said first timing signal (S T1 ) and a transmission time (T 2 ) of said second timing signal (S T2 ) through said dielectric waveguide; and controlling ( 103 ) said timing state of said local oscillator ( 17 ) based on said first timing signal (S T1 ) and said signal (S diff ) indicative of the difference between the transmission time (T 1 ) of said first timing signal (S T1 ) and the transmission time (T 2 ) of said second timing signal (S T2 ).