Adjacent Channel Leakage Power of Spectrum Analyzer

Chapter Adjacent Channel Leakage Power

Guide to Spectrum and Signal Analysis
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Guide to Spectrum and Signal Analysis

  • | 39Adjacent Channel Leakage PowerAnother common transmitter measurement is that of adjacent channel leakage power. This is defined as the ratio of the amount of leakage power in an adjacent channel to the total transmitted power. In order to calculate the upper and lower adjacent channel values, the spectrum analyzer needs three parame ters to be specified:a) the channel separationb) the measurement channel bandwidthc) the adjacent channel bandwidth (if different from measurement channel bandwidth) andd) the center frequency of the reference channelThe measurement is applicable to both modulated and unmodulated signals and provides a means of assessing the transmitters selectivity (Figure 45).Figure 45