Inphase (I) and Quadrature (Q) components of signals

Hi Dave,

Thanks for the reply. I am trying to compile the testbench, automatically generated by NCO MegaCore function using Quartus 13.1 but an error message:

"Error (10533): VHDL Wait Statement error at ncoIPDesign_tb.vhd(111): Wait Statement must contain condition clause with UNTIL keyword"

I really cannot finger out what's wrong with this "wait for" statement. I tried lines 113 to 116 but got the same error. Do you know how to fix it? I have attached the nco and testbench VHDL codes.

Many Thanks,

Lee