Pulse modulated passive intermodulation (PIM) measuring instrument with reduced noise floor
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United States of America Patent
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Sep 19, 2017
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Mar 30, 2015
filing date -
Mar 30, 2015
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Abstract
In an embodiment, a method for measuring passive intermodulation (PIM) associated with a device under test (DUT) includes generating a test signal using a measuring instrument and obtaining measurements of PIM for the DUT. The test signal comprises two or more tones each amplified to a target output power by a respective amplifier according to a duty cycle. Measurements are obtained by the measuring instrument during an active portion of each duty cycle over a sweep of frequencies. PIM is calculated for the DUT by averaging a plurality of measurements obtained for each frequency from the sweep of frequencies. The duty cycle is determined based on the target output power.
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