Elecraft KPA500 Prog. Reference - Manual (Page 5)

BootLoader Command Reference
The KPA500 uses single character commands when in boot mode. Boot mode is the state the KPA500 is
in when the rear panel power switch is in the ON position, while the main firmware is not running. This
mode is used for starting up the KPA500 or downloading fresh firmware. Bootloader commands must be
sent upper-case only.
D" download firmware
The D command is used to download firmware to the KPA500. This command is for Elecraft internal use
only. Accidentally issuing a D command may require a rear panel power off for recovery.
I" Identify
On receipt of the I command the amplifier will respond with “KPA500”.
P" Power On
The P command will cause the KPA500 to perform internal firmware checks, then execute the main
firmware to power up the amplifier. This is the command to use to remotely power up the KPA500. No
response is sent from the KPA500 after receiving this command.
Appendix: Change History
A1, 7-4-11 [1.04]
Initial release.
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