We have a design that consists of modified FMCOMMS1. We have only the Tx sdie and we use 2 AD4351 devices and ping pong among them to increase the hopping frequency.
I have tried using the ADIsimPLL to determine the loop filter but I have a couple of questions:
- The ref clock into the ADF4351 is 122 MHz but the S/W wants 120 MHz is it a problem?
- Once I set the design using the software to determine the settling time I want, How do I get the register values to program into the device.
For information, I have the following loop filter and I want settling time to be around 35 uSec.
Any help is greatly appreciated.