There is a way to force a ZigBee Chanel change...I just have to remember how to do it. From what I can discern, the DTV Xmitter is in the 5.8Ghz spectrum which *shouldn't* disrupt the ZigBee spectrum, but given enough oversaturation due to proximity, there may be an issue.
"Whatever is rightly done, however humble, is noble." [Sir Henry Royce]