i designed two boards , one with the ADL5382, and the other one with the ADL5387.
both show the same problem : a new image appears, at frequency : RFin-3*LO.
In both boards the LO is issued form an ADF4350, with a very bad third order harmonic.
So i test with an LO issued form an Signbal generator, with >-80dBc third order harmonic.
the Problem is stil there.
same thong with the eval board : ADF4350 with ADL5382 / ADL5387
there is the specified filter between the ADSF5340 and the demodulator, form CN-0134
Can I solve the Problem?
any advice, informations,