User`s guide

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Chapter 4 Features and Functions
System-Related Operations
4
Error Conditions
When the front-panel ERROR annunciator turns on, one or more
command syntax or hardware errors have been detected. A record of up
to 10 errors (34970A) or 20 errors (34972A) is stored in the instrument’s
error queue. See chapter 6 for a complete listing of the errors.
• Errors are retrieved in first-in-first-out (FIFO) order. The first error
returned is the first error that was stored. Errors are cleared as you
read them. When you have read all errors from the queue, the
ERROR annunciator turns off and the errors are cleared. The
instrument beeps once each time an error is generated.
• If more than 10 errors (34970A) or 20 errors (34972A) have occurred,
the last error stored in the queue (the most recent error) is replaced
with “Error queue overflow”. No additional errors are stored until you
remove errors from the queue. If no errors have occurred when you
read the error queue, the instrument responds with “No error”.
• The error queue is cleared by the *CLS (clear status) command or
when power is cycled. The errors are also cleared when you read the
queue. The error queue is not cleared by a Factory Reset (*RST
command) or an Instrument Preset (SYSTem:PRESet command).
• Front-Panel Operation:
ERRORS
If the ERROR annunciator is on, press to view the error. Use the
knob to scroll through the error numbers. Press to view the text of
the error message. Press again to increase the scrolling speed (the
final key press cancels the scroll). All errors are cleared when you exit
the menu.
• Remote Interface Operation:
SYSTem:ERRor? Read and clear one error from the queue
Errors have the following format (the error string may contain up to
80 characters):
-113,"Undefined header"
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