1.I have an ad9516-1 evaluation board. I want to use two cmos interfaces with different frequencies, but the sixth and seventh interfaces on the evaluation board are not soldered. Therefore, I want to solder the sixth and seventh interfaces, but I don’t know how to do it. What should I do?
2.I use the CLK pin to introduce a 20MHZ clock, and then configure the CMOS interface and LVPECL interface. In this process, no internal or external VCO is used, and only ad9516-1 is used as a frequency divider. During the experiment, I found that I had not started the signal generator to send the clock to the CLK pin at the beginning, but through the oscilloscope, I could see an unstable square wave at about 12MHz on the CMOS pin. And I also see some transitions on the LVPECL pin.
After the clock is transmitted, there are sometimes some unstable states on the LVPECL pin.
What caused the above situation and how should we improve the situation?