RIGOL DSA875 - Manual (Page 212)

RIGOL Chapter 4 Troubleshooting&Message
User’s Guide for DSA800 Series 4-20
471 Calibration data of TG lost.
Indicates that the calibration data before delivery or last valid calibration
data has been lost. Please report the error to your
RIGOL sales or
technical support team.
472 USB firmwarte lost.
473 Device information lost.
474 Data of menu, help, message and font lost.
475 Preset data to load is damaged.