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Model X3C21P1-05S

Rev A

Notes on RF Testing and Circuit Layout

The X3C21P1-05S Surface Mount Couplers require the use of a test fixture for verification of RF performance. This

test fixture is designed to evaluate the coupler in the same environment that is recommended for installation.

Enclosed inside the test fixture, is a circuit board that is fabricated using the recommended footprint. The part being

tested is placed into the test fixture and pressure is applied to the top of the device using a pneumatic piston. A four

port Vector Network Analyzer is connected to the fixture and is used to measure the S-parameters of the part. Worst

case values for each parameter are found and compared to the specification. These worst case values are reported to

the test equipment operator along with a Pass or Fail flag. See the illustrations below.

3 dB and 5dB

Test Board

Test Board

In Fixture

Test Station