Sequoia Series    219 
Appendix C: Error Messages 
Any errors that occur during operation from either the front panel or the remote control interface will 
result in error messages. Error messages are displayed in the upper left hand corner of the LCD 
display. They are also stored in the error message queue from which they can be queried using the 
SYST:ERR? Query. The error queue has a finite depth. If more error messages are generated than 
can be held in the queue, a queue overflow message will be put in the last queue location. To empty 
the queue, use the error query until the No Error result is received. 
Errors appearing on the LCD will generally remain visible until the user moves to another screen. If 
multiple error messages are generated in succession, only the last message will be visible as there is 
only space for one error message on the LCD display. 
The same area of the display is also used to display status messages. While error messages always 
have a negative error number, status messages have a positive number.  
The table below displays a list of possible error and status messages along with their possible cause 
and remedy.  
Correct  command  syntax,  e.g. 
misspelled or unsupported command.