| 摘要 |
Variations in received signal amplitude caused by filter characteristics are reduced by a C/I measuring apparatus for a signal having a fluctuating carrier-frequency, comprising a filter for filtering the signal and means for splitting the signal into an RSS signal representing the signal strength and a BB signal representing the momentary carrier frequency deviation, comprising means for measuring the RSS signal unaffected by the frequency dependent attenuation in the IF filter. A method of measuring the C/I of a received signal is also disclosed. The method comprises the steps of filtering the signal using an IF filter to obtain one signal channel, feeding the signal to the FM detector and the RSSI unit, and measuring the signal strength of the received signal at a selected, substantially constant, carrier frequency. |
