AWT PIM-P, User Manual, Page: 17 / 110

4-5
PIM-P Analyzer User’s Manual
Copyright AWT-Global, LLC. All rights reserved.
4.1 USING HIGH PERFORMANCE RF ACCESSORIES
PIM test sets combine very high output power, with extremely sensitive receivers. Note:
The sensitivity of the PIM-P receiver is many times greater than the sensitivity of a Base
Station. Any unwanted influence generated by poor performing accessories will reduce the
accuracy of the desired measurement. To ensure quality measurements great care has to be
taken; not only for the test system but also for the cables and accessories. Remember you
want to measure the PIM of the device under test, not a poor performing or worn accessory.
Hint
Prevent unnecessary force:
Nearly all RF connectors are designed to allow for manual connection. To
ensure a proper connection, RF connectors should be manually mated, push in
to seat the center pin, then hand tightened until seated. The torque wrench
should only be used to tighten the last ½ turn or less. Improper connections
will cause performance loss. This includes under torqueing and over torqueing.
Both, over and under-torqueing, result in weak connections which contribute to
PIM. Over tightening may damage the connector and lead to visible metal
fragments in the connector’s surface. All damaged connectors and connectors
savers should be replace prior to testing.
Hint
Keep Accessories clean:
Dust and dirt may affect test results. Make sure accessories are stored
properly and clean. Please use the protective caps - to keep the accessories free
from contamination. Never use sharp devices to remove any contamination
because scraping can cause metal chips in the contact areas, which will
generate PIM. If any dirt, corrosion or any other foreign matter needs to be
removed use special RF contact cleaning tabs and / or compressed air.
Hint
Keep Accessories dry:
Even the best plating will wear if accessories are frequently used. Moisture
will cause oxidation. Prevent moisture by using supplied protective caps and
keeping accessories stored properly. Many connectors are weather sealed to
prevent moisture from entering the contact area. If you discover moisture use
RF contact cleaning tabs and blow dry with compressed air.