[Elecraft] KAT500 Remote software and KPA500 remote software

[Andy Durbin]

"But keep in mind that the KPA Utility will not connect to the KPA500 unless the amp is first powered on"

That may be a bit misleading.  Depends on what you mean by "powered on".   I consider the KPA500 to have 4 states:

Not powered
Powered but off
STBY
OPER

The utility can be connected to KPA500 in the "powered but off " state and the KPA500 will accept a limited subset of serial commands.   One of those commands, P,  will turn it on.  P can be sent with the Utility "command tester and will change the KPA500 state to STBY.  At this point all the normal Utility functions work.

Andy, k3wyc