| 摘要 |
PURPOSE:To decide a receiving electric field intensity of plural channels by inexpensive constitution, by converting an analog voltage corresponding the receiving electric field intensity into a frequency signal, and deciding the rank of the receiving electric field intensity by relative comparison of the measured value of this frequency. CONSTITUTION:A signal from a base station received by an antenna 1 is received by a receiver 2, a received signal is inputted to a voltage generator 3, and in this generator, an analog voltage corresponding to a receiving electric field intensity is generated. This voltage is converted to a frequency signal corresponding to its amplitude value, and inputted to a frequency measuring circuit 5. In such a state, when a start signal is applied to a circuit 5 from a logical circuit 6, the circuit 5 updates successively a receiving channel and measures the output frequency of a converter 4 in each channel, and supplies its measured value to the circuit 6. The circuit 6 compares relatively the measured values of each channel, discriminates a higher rank, and displays its result. |
