very very strange - question involving B&T modulator

[Adam]

With the modulator transmitting on ch2, I'm picking up the audio of a football game on ch3. With the modulator off, or on another channel, I don't get the football game on any channel on the tv.

The same audio of the game is on AM radio, but on the radio it's about a second or so behind what I get on the tv. I'm not picking up the game on any channel on FM radio at all.

And on ch4 on the tv I recieve a pattern of 2 horizontal bars of black, 2 horiz bars of snow, no audio, regardless of what I do with the modulator.

What is going on?