Typically the mx980 is the only one being used at the time. It's in the same room as the gear which is why I notice the IR commands work without issue. My emitters have red lights that indicate when they sending a command. They almost never light up when pressing the buttons on the mx980.

Absolutely no issues when running the same gear (sat/bluray/component video switcher) with mx900. I've brought it down to the same room to test and it works fine including the emitters lighting when button is pressed.

The mx980 hasn't been dropped. I'm the only user of it. I can't say the same about the mx900 which has probably taken a beating over the years. Until recently the mx980 has been rock solid and worked without issue.

I'll try moving the mrf260 to a different location to try to eliminate interference. But I suspect there would be mx900 issues as well if there were interference.