[Elecraft] KPA500 MCU LOAD screen

[Andy Durbin]

It's probably worth emphasizing that the KPA500 is only vulnerable to a spurious "D" command when it is in "powered but off" state.   Perhaps the problem can be avoided by changing the sequence of remote station power up so KPA500 is only powered when the server is stable.  It may also help to limit the amount of time the KPA500 is in "powered but off" state.

Seeing what the server is sending may be useful.  I found my Rigol DS1054Z scope to be very helpful during my controller development.  When investigating my spurious loader issue I was able to capture the offending RS-232 data and see how it could be decoded as "D" even though "D" had not been sent by my code and was not present in the TTL signal.

73,
Andy, k3wyc