How do you use the "IR IN" connection on the back of a receiver? I am specifically referring to the connection on the back of the Onkyo TXSR601 A/V receiver. Do you just use a 3.5mm to 3.5mm mini jack cord from an IR connecting block emitter? Also, how is this input different from the one that says "Remote Control" with a similar looking mini jack connection? Please let me know if anyone has experience using these features. Thanks.