1. A method of generating a PIM (passive intermodulation) diagnosis for one or more wireless networks, the one or more wireless networks comprising equipment deployed at a plurality of cell sites, the method comprising:receiving respective PIM detection results from PIM detection devices for respective cell sites, each respective PIM detection result representing detection of PIM caused by passive intermodulation between carriers of the one or more wireless networks, each respective PIM detection result being obtained by correlation of respective simulated PIM signals generated from samples of at least a first signal that is hypothesized to have caused PIM with a received waveform for a respective cell site, and each respective PIM detection result comprising respective magnitudes of received PIM at respective cell sites;
normalizing the received respective PIM detection results to account for transmission power and frequency allocation of respective cell sites;
correlating the normalized respective PIM detection results with data relating to at least one of a condition of respective cell sites or an environment of the respective cell sites to produce correlation results; and
dependent on the correlation results, generating the PIM diagnosis,
wherein the normalized respective PIM detection results represent an underlying propensity of a respective cell site and its environment to generate PIM.