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RDS level 2KHz, deviation +- 75KHz.

Discussion in 'Electronic Design' started by Boki, Jul 22, 2006.

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  1. Boki

    Boki Guest

    Hi All,

    I have a specification on my FM TX,

    RDS level 2KHz, deviation +- 75KHz.

    1. If my FM TX freq is 100MHz, where is the RDS freq ?
    2. The deviation means when RDS is trasmitting ( and keep trasmitting
    data repeat), I check the tone deviation of RDS?

    Thank you so much!

    Best regards,
  2. try radio newsgroups, such as

  3. Joerg

    Joerg Guest

    Hello Boki,

    AFAIK it rides on a 57kHz subcarrier.

    Best would be to read up on the spec:
  4. Guest

    I have read the spec and implemented a sw-side receiver -> webb app.
    Anyway asfair, RDS data is sent at 57 kHz just like the sound is sent at
    <19 kHz. A simple way to get to the data is to get the baseband signal
    connected to an RDS chip from philips which will give you data+clock asfair.
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