BA ONE RDS signal not clean

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  • July 31, 2018 at 10:41 am #3435
    MPXfan
    Participant

    The Breakaway ONE have non-clean RDS Signal. It has "side" signals that must not be there, like parasitic modulation! They are "jumping" around the RDS main signal.

    July 31, 2018 at 9:17 pm #15052
    Milky
    Keymaster

    Can you please provide screen shots and details of your audio set up? It's easy to make accusations, but we need to know what we are working with here.

    August 4, 2018 at 2:59 pm #15053
    MPXfan
    Participant

    Yes, the screen is inside Breakaway. It`s own Spectrum analyzer.
    If you still not see it – i`ll take a "picture" of what i mean.

    https://ibb.co/db5Vyz

    August 7, 2018 at 3:09 am #15054
    Leif
    Keymaster

    Hello doggy,

    This is a non issue. The sidebands are created naturally by the biphase RDS modulation process. Filtering more tightly than this is against RDS spec and degrades the signal. If you compare with other RDS encoders you will find that BaOne is among the cleanest ones.

    Best regards,
    Leif Claesson

    August 7, 2018 at 5:08 pm #15055
    MPXfan
    Participant

    Hello Leif,

    Respect for what you`re doing. But i know for a perfect clean signal from other softs(saw it the same way) and it works just perfect.
    No "side" signals, no any issues.

    So , i still suggest to clear those things – It looks like a "phase noise". I`m not saying it is, but in my opinion – is not like it should be.

    August 7, 2018 at 9:05 pm #15056
    Milky
    Keymaster

    You state that "other softs" have a "perfect clean signal", BUT are they to RDS specification? It is relatively easy to over filter, but you then lose good signal with the bad.

    It's like signal to noise specs in audio. You can lose the noise floor, but you will also lose some of the audio content.

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