I am new to RF-mixers, and i read that RF mixers should maintain the amplitude and phase relationship from the RF-input signal (Linearity).
Do I use a wrong type of mixer, ore are there other ways of doing this. I can not get phase alignment. Maybe I am missing a fundamental issue.
If anyone can enlighten me on this subject, I wold appreciate it so much.
I am using the mixer “ADL5801”. My RF-in signal is 0dbm, 440Mhz.
My LO-inn signal is 0dbm 485Mhz.
My IF-out signal is filtered thru a 45Mhz crystal-filter.
I am not able to get any phase lock between RF-in and the 45Mhz.