RE: differences in SLT RX?
If your receivers are Tactic SLT receivers, and they will not link to a Tactic SLT transmitter, then something is wrong. Please make sure the receivers are very close to the transmitter while linking. Also, please make sure that any 2.4 GHz equipment in the house is far away or turned off. Many times, wireless computer routers cause problems indoors. If you still have difficulties, then please send all the affected quipment to the service center.