FAQs from Rohde & Schwarz

State of external reference via remote control


I have switched to an external reference frequency.

How can I check if the frequency is locked via remote control?


You can check the state of the external reference frequency with the STATus:QUEStionable:FREQuency register


If the reference frequency is not locked, it will return a '2' or a '512'.

If everything is OK, it will return a '0'.