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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.

    Question:
    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,
    Boki.
     
  2. try radio newsgroups, such as rec.radio.broadcasting


    martin
     
  3. Joerg

    Joerg Guest

    Hello Boki,

    AFAIK it rides on a 57kHz subcarrier.

    Best would be to read up on the spec:
    http://www.rds.org.uk/rds98/rds98.htm
     
  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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