I used the IR codes from Inteset 422-3 remote and Inteset IReTV USB IR Receiver combination to control Nvidia shield via IR.

Only one issue I am having is - I have Xantech ml95 IR extender system (equipment is in next room) and the IR from Inteset works directly when pointed to the IreTV IR receiver but it does not work, when I try to use the Xantech system (IR emitter from xantech was taped to the IR receiver and yes, it is emmitting IR but shield is not responding). Does it have to do something with the IR frequency being used? I just ordered a 38 khz capable IR emitter. My Xantech ML 95 is 20 khz to 50 khz. The connecting block xantech 791-44 is 30 to 60 khz. I am assuming it is the emitter? Just today, I found an emitter on amazon, which specifically says 38 khz. If anyone know of general purpose emitters which cover 30 to 60 khz, please let me know.
Does anyone know what carrier frequency Shield IR codes use?
My xantech extender system works just fine with Fire TV IR codes.

Do connecting blocks have limitations? Mine is about 20 years old xantech 791-44.
My IR receiver is Xantech ML95.