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Passive Intermodulation (PIM) Measurement. Passive intermodulation (PIM) is a form of intermodulation distortion that occurs in passive components such as antennas, cables, connectors, or duplexers with two or more high-power input signals.PIM in the transmission path degrades quality of the wireless communication system.nnovative Passive Intermodulation (PIM) and S-parameter Measurement Solution with the ENA. This application note introduces the solution that combines PIM and S-parameter measurements by using the vector network analyzer.
Demodulation is the act of extracting the original information-bearing signal from a modulated carrier wave. A demodulator is an electronic circuit (or computer program in a software-defined radio) that is used to recover the information content from the modulated carrier wave.here are several ways of demodulation depending on how parameters of the base-band signal such as amplitude, frequency or phase are transmitted in the carrier signal. For example, for a signal modulated with a linear modulation like AM (amplitude modulation), we can use a synchronous detector.