cyclone V caacading fpll for sdi ii(transceiver) xcvr_refclk filter error?

Hi,

You might want to use RTL viewer to look into the SDI II IP to see if there is any fPLL already instantiated. I am not familiar with SDI II IP but just to double check in case the IP itself have had fPLL inside. Then it might conflict with your external fPLL.

To set PLL location, this is what I generally did:

Use RTL viewer, look for the target PLL instance ie fPLL, right click on the instance, locate in assignment editor. Then go to the Assignment Editor, and set the location for the PLL location.