SPURIOUS test FAIL 1

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  1. Q:

    In an application integrating a GSM/GPRS module, which should be the source of harmonics of  GSM carrier failing spurious requirements?

     

    A:

    The typical reasons for harmonics of GSM carrier creation are:

    • antenna mismatch/detuning
    • contribution of nonlinear components, exposed to RF incident power, re-radiating unwanted emissions on outer layers tracks.
    • GPS antenna, near GSM antenna, exposed to RF incident power and GPS chain generating and re-radiating the harmonics.