ADF 4351 TX Spurious

[IK2NBU]

Hello everyone,

we have finished building a nice VFO with ADF4351 board as shown in the photo.
Has anyone tried it in transmission?

We have 2 small spurious residues at -60 db generated above and below 1.8 Khz from the carrier.
They basically repeat on every band from 72 to 435 MHz in a constant way.

Do you have any suggestions on parameters to lower their level?

Thank e 73 Arnaldo ik2nbu

ADF4351.jpg (192.28 KiB) Viewed 7330 times

[jdow]

This is a forum for SDR-Radio software products from Simon, G4ELI. You might ask about that in that product's support pages. (60 dB down is generally a legal level around the world.)

{^_^}