Physical Layer Overview
•
RDS subcarrier frequency is the 3
rd
harmonic of
the pilot tone (19 kHz x 3 = 57 kHz).
•
Subcarrier frequency is in-phase or quadrature to
the pilot tone’s 3
rd
harmonic.
•
Pilot tone deviation is +/- 2kHz, so subcarrier
frequency deviation is +/- 6kHz.
•
Subcarrier frequency is amplitude modulated by
the biphase coded signal with a shaping filter.
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