The Xiaomi Yi is my first camera that has 2.4 GHz connectivity built in.

Having a number of R/C multirotors all using 2.4 GHz control, I was wondering if the 2.4 GHz transmitter in the Xiaomi Yi camera was absolutely off in the standby state, and not transmitting at all.

Being a portable battery powered device, you would expect so, but I wanted to verify this using the spectrum analyzer.