Passive Intermodulation Measurement Techniques
Through interaction with engineers and technicians in many countries throughout the world, Summitek Instruments has had the opportunity to discuss and evaluate measurement techniques as they apply to a wide variety of items. They have discussed the problem of IM with component manufacturers, infrastructure providers, site managers and service providers. This perspective combined with the knowledge gained through the development and manufacture of our Passive Intermodulation Analyzers, forms the basis of our approach to the measurement of passive intermodulation, and the test capabilities built into their analyzers.
Our findings suggest the following:
- Consistently manufacturing low IM items is extremely difficult to achieve in mass quantities where the emphasis is on cost reduction
- Dynamic measurements should be performed on all PIM critical devices
- Fixed frequency measurements may not be adequate due to the frequency dependent characteristics exhibited by many devices and subsystems
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