Red CAL Sign in the Display is on

Question

The red UNCAL sign is on - what has to be done?

Answer

Typical reasons for the missing calibration data are:

- The FSEx exhibits a fault. In this case, the calibration will stop and a message will be displayed.The instrument must be repaired by an R&S service center.

- A general reset (factory reset) has been performed. The calibration data is erased and the instrument needs to be recalibrated by pressing 'TOTAL CAL'.

- A firmware update causes a factory reset and all calibration data is lost. Recalibration with 'TOTAL CAL' is required