Each remote model tends to have its own behaviors around the Master Power key, so I think you'll just have to try stuff.

I wiil add that it is very unlikely that you actually need to press cable before entering a general purpose macro, for which the bound key is not Master Power. It is critical to make sure while defining the macro that you press a device mode button at the start-- so that you always get the same action regardless of the device mode in use when the macro key is invoked. Also, it is important to be sure that the buttons you record in a macro are defined for the chosen device mode, and also not involved in VPT or channel lock.