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""" Interface definition for oscilloscope devices. """

class Oscilloscope:
    """
    This interface specifies the common API for all
    supported oscilloscope devices.
    """
    def __init__(self):
        pass

    def measureAmplitude(self, channel: int) -> float:
        """ Return amplitude measurement on specific channel. """

    def measurePeakToPeak(self, channel: int) -> float:
        """ Return peak-to-peak measurement on specific channel. """

    def measureRMS(self, channel: int) -> float:
        """ Return RMS measurement on specific channel. """

    def measureFrequency(self, channel: int) -> float:
        """ Return frequency measurement on specific channel. """