problem using cyclone ep1c3t144

Your asking, how to correct the receiver phase to be alligned with your LVDS signal?

It seem to me that, the lvds-receiver Megafunction has an undocumented systematic phase shift, that is inappropriate for cyclone design, e. g. when receiving from an Analog or TI LVDS ADC. I remember, that I once had some problems with it. In one case, I finally ended up in using a custom LVDS receiver based on altddio_in and a shift register. This also allowed me the straightforward definition of a 14 bit receiver, that isn't supported by the Megafunction for arbitrary reasons.

With the lvds receiver Megafunction, your basically able to setup any phase by setting the phase shift for the slow clock accordingly. But a correct setting isn't always provided by the Megawizard.