RD1607: Receiver was stuck on L band. OTTER interface had crashed, needed J-Mac's help to restart the OTTER server and successfully communicate with the receiver again. Caltsys was giving error due to it being setup for the DBBC instead of the mark 4, J-Mac edited the .prc file (Arwin).
Happens (perhaps) if power failure/glitch. OTTER needs to be reset. sudo otter reset. In setup notes now.