limit RF power based on amplification specs

[gadamc]

For the given rf amplifier in our setup, there is a recommended power regime. In particular, there is a maximum input power, beyond which device damage can occur.

This will be true for any experimental setup.

Need to add a check into code to prevent users from exceeding a particular power setting.

This could be added to experiment objects with a default value. But it could also be added to the QT3RFSynthControl object.... ? But that just controls the windfreak device, which doesn't itself have a limitation. Q - where to put this hardware check / restriction?