In one aspect, the present invention provides a method of processing a substrate, e. The device having a laser device that is configured to attach to a pet though use of a garment, such as a collar. Therefore, as compared with a case where the capacitor is mounted on the LSI chip side, a transmission path through the capacitor can be extremely shortened. Thus, it is possible to form images directly receiving a document file such as a PDF file on a printer with a limited usable memory capacity. The reference input provided to the regulator can be appropriately filtered to reduce noise. Then, the mobile terminal station detects a synchronizing signal pattern from the amplified received signal, and controls to perform an automatic gain control by using the fixed gain set value as the initial value of the automatic gain control when the synchronizing signal pattern is detected and modifies the fixed gain set value when the synchronizing signal pattern is not detected.