An AC-DC converter converts an alternating-current voltage, supplied from an external power supply, to a direct-current voltage higher than a peak voltage of the alternating-current voltage, and outputs the direct-current voltage to a first power supply line. A test symbol sequence is transmitted from the transmitter under test as an analog output signal. The light frequency is split such that the UV wavelength of interest for PV cell operation is split from all the other wavelengths and focused on the PV cell or light conducting media that will direct the UV to the PV cell location. 4 and the degree of sphericity is 2 or less. The second strap is connected to the first strap at a plurality of connection points.