Greetings, all.. My old MythTV system went tits-up on me so I built out a new one with a pvr-250 instead of a dumb capture card. Everything works fine except for the cable tuner. All I get is snow. My question is this-- How can you tell what tuner is on that card? It's set to the default 2 (phillips ntsc) but it's obviously not right. TIA- --Dennis