Prove it. If anything, the coverage was kind to the Yes side. Certainly the ludicrous economic plans weren't subject to rigorous scrutiny.
Indeed there were just as many complaints from the NO side, they just didn't wrap it up in hysterical, conspiratorial language like Salmond and his impressionable followers. Isn't it noticeable that every political side claims the beeb is biased against it, not least the Tories? I take that as evidence that all things considered it is done a decent job, which includes raising the questions partisans find inconvenient