I have designed a circuit board about hmc833. The hmc833 worked very well. For some other reasons, I design another board again. this time,my hmc833 has a big problem. It is unlocked at some frequences. For example , I use the frequence between 2 and 6G. between those frequence , there are 5 frequence point is unlock. Others is good. The hardware and the program is the same as forward . I has made much try.But it does't work. Can you give me some suggestion about this .
Look forward to your suggestion .