Your not sharing that huge wok with a SKY STB are you through a splitter of some kind? If so, you will need to be sure that you have power passing on both legs. I reckon the 22khz signal is well below the pass band of most splitters as they are usually 950mhz to 2250mhz or thereabouts. As far as the spliiter is concerned, 22khz is virtually DC.
Cheers Mike
Cheers Mike
New Zealand