Quote:
Sure it actually requires a signal?


It is certainly possible. For example all the wireless TV links that Maplins sell in the UK will only operate when a video signal is present, meaning that you can't use them to transmit a purely audio signal. I always suspected that some obscure European regulation (or a misinterpretation of such a regulation) was the cause of this oddity.
_________________________
Remind me to change my signature to something more interesting someday