AnsweredAssumed Answered

MXA Two Tone Second Order IM Spec

Question asked by spontaneousorder on Mar 31, 2015
Latest reply on Apr 9, 2015 by Dr_joel
Feed a two tone signal (f ~1~ and f ~2~ ) to a nonlinear system, the following distortion product would be generated:
h6. 2 ^nd^ order
f ~1~ + f ~2~
2f ~1~
2f ~2~
f ~2~ - f ~1~
...
h6. 3 ^rd^ order
2f ~2~ - f ~1~
2f ~1~ - f ~2~
...

My questions are:

1. MXA/PXA specifies the 2nd order harmonics distortion, but what about the 2nd order IMD f ~1~ + f ~2~ ?
2. Which part of the signal chain contribute the most to the 2nd order IMDs, including f ~1~ + f ~2~, 2f ~1~ and 2f ~2~ ? Is it the mixer, the IF amplifier, the ADC or something else?  

Outcomes