I am hooking up an antennae to get the Superbowl in HD (yes I have an HD TV

) Anyway, I am getting not so great reception on the analog right now but since there's nothing on in HD right now the signal strength meter doesn't even register.
Is there any correlation between analog reception and HD? I've heard HD comes in much easier and even though I'm getting a bad signal now I'll likely get a good one during an HD broadcast. Is this true?