The MPX Spectrum with RDS v2.0
The extra carriers fit into the space 57KHz to 76KHz. The obligator carrier is at 57KHz, the other carriers are optional as per requirements of the broadcaster.
The Spectrum
The MPX Spectrum Design
The mono or L+R signal occupies 30Hz to 15KHz.
The pilot is at 19KHz.
The stereo or L-R signal on a 38KHz sub-carrier occupies 23KHz to 53KHz.
The obligatory RDS sub-carrier is at 57.00KHz.
Optional RDS sub-carrier at 66.50KHz.
Optional RDS sub-carrier at 71.25KHz.
Optional RDS sub-carrier at 76.00KHz.