Tvheadend

Hey folkes. First off, I'm very very new to all of this, and am quite confused. So, first a bit of background.

I'm in Newfoundland, Canada, and we have a grand total of 2 over-the-air stations. When I have my antanna plugged into my HDTV, I can pick them up, they come up as channels "8.1" and "21.1" (there is also a radio channel on 21.1 as well. Channel 8.1 is sometimes weak, and often cuts out unless my anntanna is in the exact perfect position. Its due to this that I believe i'm having trouble getting it into tvheadend properly.

I have a Hauppauge HVR 950Q usb stick plugging into my Zotac MAG running OpenElec 2.95.6. Following some guides, I'm up to the point where I've one channel and the radio station working (channel 21.1 per my tv), but the other channel (8.1 according to my tv) did not pick up. Is there a way I can add this channel manually so I can still "try" it and adjust my antanna until it picks it up? Or do I have to run a full scan over and over until one lucks into picking it up?

Loving this so far though having the live tv working through XBMC. Just hoping to get this one other channel going.