| 摘要 |
The invention relates to a method for fine tuning the resonant frequency of a filter in a combiner, which is provided for combining signals from several radio channels, to the carrier frequency of an input signal to said filter. The power (Ta) of the output signal from said filter (14a) is measured in a narrow frequency band around the carrier frequency of said input signal. Furthermore, the power (Ra) of the signal reflected by said filter (14a) is measured in a narrow frequency band around the carrier frequency of said input signal. Thereafter a measure of the ratio between the two power measurements is formed. The resonant frequency of said filter (14a) is adjusted so as to maximize this measure. <IMAGE> |
