Figure 5

RF pulse generation and signal readout. The upper half shows how an arbitrary wave is generated. After the wave is generated, it is power amplified and sent to the control coil (see Fig. 2) so that the quantum state can be manipulated. After the RF pulse irradiation, the electro-magnetic signal induced during spin relaxation is picked up by the coil, and then is sent to the preamplifier. After the signal is amplified, it is sent to the ADC and processed by the master board