Hi Cristian,
If I understand your question correctly, then yes, this is normal behavior. I will include two images of the setups of my working SA44B so you can compare.
I will sweep from 100k – 4.4Gz with 10k RBW at both reference level of 0 and again at -50.
Your results may not match exactly, but should be close.
Regards,
A.J.
