| 摘要 |
PURPOSE:To detect the deterioration of communication quality due to the leakage power, etc., of the adjacent channel of the frequency adjacent to the reception desired frequency by taking the ratio of the received electric field level information of at least two reception parts and comparing the value with a constant threshold value. CONSTITUTION:A discrimination part 5 lets two waves in the frequency relation adjacent each other which can be known from frequency designation information 4, for example, the adjacent wave for the reception desired wave of the frequency f0 be f'0 and f''0 among inputted N pieces of reception electric field level information 1C-NC. Where, f''0=f0$DELTAf;f''=f0+DELTAf:DELTAf is defined as a carrier interval. The ratio of the reception desired wave to the reception electric field level at respective reception electric field levels of the frequencies f'0 and f''0 are compared with a set constant threshold value. When the ratio exceeds the threshold value, the communication deterioration of the channel f0 due to the leakage power of the adjacent channels f'0 of f''0 is judged to be generated and to output the result. |
