rx_freqlocked signal on Cyclone IV GX

Thanks for the suggestion.

It seems to be constantly asserted, but I'll double check that.

I found a knowledge base article that seems to describe the problem I'm seeing:

http://http://www.altera.com/support/kdb/solutions/rd12152010_565.html (http://http//www.altera.com/support/kdb/solutions/rd12152010_565.html)

This article indicates that the problem was caused by a bug in Quartus 10.1 and it links to a patch that fixes the problem. I'm using 11.0sp1, so hopefully that bug has been fixed. At any rate, there's no patch listed for 11.0sp1.

I submitted a service request on this and will post here if I find anything out from that route.