Viavi AVX-10K Operation Manual page 265

Chapter F Standard Accessories and Procedures
Appendix F. Standard Accessories and Procedures
When testing a diversity transponder with the AVX-10K, the antenna that is not being
tested needs to be shielded. This can be accomplished by connecting a 50-ohm load to
the coupler that is placed over the antenna not under test. Use the 1' coaxial cable to
connect the load to the coupler.
NOTE: The UC-584S coupler simply rests on top of the aircraft over the antenna. No
clamping is necessary.
Connect the AVX-10K RF I/O port to the other coupled antenna, run the XPDR AUTO
application and set the test set RF Port to Direct with Coupler on the setup page. Set
Diversity Test to ON and complete the setup with Cable Settings and Coupler
Settings.Select either the TOP or BOTTOM tab and continue with the test.
Once testing on one antenna is complete, swap the AVX-10K and the load to the opposite
couplers, and complete the other test (TOP or BOTTOM).
Rev 004
F - 8
AVX-10K Operation Manual 22135254
January 2024