Patent ID: 8498582
Filing Date: 2013-07-30
Classification: H04B

Abstract:
1. A system for measuring passive intermodulation (PIM), comprising: a base unit which includes frequency-independent components configured to produce test signals in a broad frequency band and a receiver adapted to receive a reflected PIM signal generated by a PIM source; a plurality of modular frequency-dependent plugins selectively connectable between the base unit and the PIM source, each operating over a different frequency band and including a narrow band amplifier and a narrow band isolator for each signal source, a duplexer and a test port connectable to the PIM source; wherein the frequency-dependent plugins include frequency-dependent components and are associated with a particular frequency band narrower than the broad frequency band; wherein the frequency-dependent plugins are connectable between the base unit and the PIM source to measure PIM over the particular frequency band; wherein the frequency-dependent plugins are disconnectable from the base unit so that the frequency-dependent plugins associated with different frequency bands within the broad frequency band can be connected to the base unit; and wherein the frequency-dependent plugins receive the reflected PIM signal from the test port, and pass the reflected PIM signal to the tuned receiver.