| 摘要 |
PURPOSE: To reset the device location required due to the degradation of a communication state by the hand of a user without stopping the working of the device by reading the value corresponding to the amplification factor of an amplifier from an AGC circuit, calculating the intensity of reception infrared ray and displaying the intensity. CONSTITUTION: A reception side amplifier 213 amplifies the reception infrared ray signal being the electric signal corresponding to the infrared ray received from space to a fixed level. The amplification factor is inversely proportional to the intensity of the received infrared ray, an arithmetic processing such as a division, etc., is performed for the value corresponding to the amplification factor of the amplifier 213 that a CPU 205 fetches and the value proportional to the infrared ray intensity from space can be obtained. The CPU 205 validates the serial input permission signal of a display device driving circuit 218 and writes the value proportional to the intensity of the received infrared ray in a serial port 208. As a result, the value proportional to the intensity or the infrared ray intensity can be displayed on a display device 219 at an arbitrary point of time. Therefore, when a communication state is degradated due to the change of external environment while a device is working, the installation location of a transceiver part can be changed, looking at the display device 219 by a user. |
