When I did some initial testing myself I found that the tx signal was getting induced into rx line and was triggering the rx active led but otherwise functioned ok..

Then I found that the controller wouldnt recognise my AWA TV,s remote start signal so I reduced the valid start count....

Now that the start count has been reduced occasionally the busy output gets triggered by the induced tx signal, its has no effect on Homevision as its busy transmitting the signal................(more of an nuisance than anything)

The valid start may have to be reduced even more as Graham has found his Pace DigiBox remote doesnt get recognised............All of Andys gear that hes tested so far works fine............