Tool/software:
I am trying LMX2571 aliexpress board and I got succeed on board osc(100MHz) make 1.0GHz out
So after than I try external refernce clk(10MHz)
But it show +-2.45KHz offset peaks(-33db from center) added a lot on my spectrum plot
What I got changed things are
1) Fosc 100MHz -> 10MHz
2) MULT_WAIT(2000 -> 200)
And nothing.. I checked reference clk end of the osc_in...
so I checked signal min was -300mv so i got connect DC to up minimum to 200mV
But result is same
What should i check more..?
I think loop filter is ok because same Fpd setting was operated well
this is schematic about external reference clk input
