DSP2 or DVR Check Boxes Disabled or "Installed in K3" is "N/A"

The KRX3 Second Receiver Option must be installed and "enabled" using the K3 CONFIG:KRX3 menu selection.

The KDVR Digital Voice Recorder Option must be installed and "enabled" using the K3 CONFIG:KDVR3 menu selection.

See "Option Module Enables" in the Configuration section of the Elecraft K3 Owner's Manual.