What does UNCOR mean on the 71400C display?

UNCOR appears at the upper right of the graticule if your analyzer needs electrical calibration with the built-in correction routine. Since the calibration routine lasts about three minutes, execute it only when the analyzer requires calibration:

• At the beginning of each day
• After extreme temperature changes
• After selecting a new input port
• After moving the analyzer

To execute the electrical calibration routine, follow this about five-minute procedure:

• Connect between 70810B RF Input and 70900B Calibrator
• Push Menu -> Amptd -> CAL ALL