I'm trying to use an evaluation board for the HMC704 to experiment with the HMC733 VCO (10-20GHz). I have div-by-4 in the feedback path of the RF. I modified the board to support a larger VTUNE analog swing (up to 22V). This all works with my own custom software controlling the evaluation board; however, I'd like to use the evaluation software provided (it has more features).
I have downloaded the software and USB driver. I load the register file provided, but this is for an on-board VCO. I never get a "lock detect" status. Instead, it always reads "UNLOCKED" in red. I have tried to simply lock with an R=1 (50Mhz), and N=55 which should lock to 11GHz but nada.
Are there ways to get or create a default register set appropriate for this test case? I have tested that USB turns on and off the chip enable; however, is there a better way to test USB communications?