Method scan_amplitude

examples/backend_frontend/myapps.py:115–137

Open the shutter an then for each amplitude: - scan the amplitude of the function generator. - sleeps .3 seconds. - measures the trace of the oscilloscope. - yields amplitude, data for each amplitude. Finally, close the shutter. :param amplitudes: it

(self, amplitudes)

    new_data = QtCore.Signal(object, object)

    def scan_amplitude(self, amplitudes):
        """Open the shutter an then for each amplitude:
        - scan the amplitude of the function generator.
        - sleeps .3 seconds.
        - measures the trace of the oscilloscope.
        - yields amplitude, data for each amplitude.

        Finally, close the shutter.

        :param amplitudes: iterable of amplitudes.
        """
        self.shutter.opened = True

        # We use the embedded app to perform the actual operation.
        # Notice that we have not explicitly instantiated the AmplitudeScanner
        # nor provided the instruments. Lantz has done this in the back
        # connecting InstrumentsSlots by name.
        # i.e. self.osci is self.scanner.osci
        for amplitude, data in self.scanner.scan_amplitude(amplitudes):
            self.new_data.emit(amplitude, data)
            yield amplitude, data

        self.shutter.opened = False

    def _scan_amplitude(self, amplitudes):
        """Because scan_amplitude is a generator, this helper functions is used