At HF the Anritsu tee is likely not going to be that much better a cal
as the supplied SOL. To test it cal with the ANritsu Tee and then
measure the supplies SOL. Likely any difference you see will be
due to the N to SMA adaptors adding length to the calibration plane.
At upper UHF it may make a difference.
Generally while good there is a finite level of accuracy available
and you have to go to extremes to verify it.
Allison
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