[Elecraft] Another PSK31 Power Question

[Parker Buckley]

I know this has been batted around here recently, but I have an additional question.  When setting power levels are we all talking about using a single tone, as when I activate the Tune button in Digipan, or the two tone idling signal I get when pushing the Pause/Break key?  Different power levels result.  Which do I use when establishing the 50% max power limit ( 5 watts for my QRP K2)?

Thanks,
Parker WD8JOL K2 #2636