I was watching the Kentucky Derby via OTA on my DTC100 which feeds my JVC 30k via Firewire. When I switched to the JVC view I only see the second sub-channel and not the main channel. I know you can change sub channels while watching a recording by using the ch-/+ button but that doesn't work when its 'live'. Anyone know how I can do this? I wonder why it even happened in the first place, never seen this on any other DT channels.