Meanwhile......the learning curve must be a long one! That receiver with its remote is really frustrating. You can hold the remote steadily in one place, send some commands and one or two may pass and the other are completely ignored. Or sometimes, I have to let the command "sink in" the receiver. IOW, I send a command and will have to wait for the receiver to digest it before sending anything else.
Also, it seems the 54.0 remote is UHF only for the receiver commands. It has IR but for other equipment only. I would've liked the be able to use IR (and deactivate UHF) for receiver commands.