I'm testing my ADF4108 based design, I am using a Synergy Microwave VCO that works up to 8GHz and I want to generate signals in the frequency range near 7400 MHz.
I am using a 20 MHz TCXO as a REF_IN clock and a passive filter loop designed with ADISimPLL, when y set the R register the output signal goes to the higher limit (Vcp=5V) and when I introduce AB register, no matter the A and B values I set, the output frequency goes to 7.08 GHz. My configuration procedure is Initialization Latch Method
My configuration registers are:
R: 0x120280 (R=160)
AB (For 7412MHz): 0x073D01
Steps 125kHz (20MHZ /160)
I hope anybody could help me with this.