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Agilent E1441A Application Information 55
Chapter 2
System-Related Operations
This section gives information on topics such as error conditions and
self-test. This information is not directly related to waveform generation but
is an important part of operating the function generator. Topics covered on
system-related operations are:
• Error Conditions
• Self-Test
• Memory State
• Firmware Revision Query
• SCPI Language Version Query
Error Conditions When the faceplate Errors LED turns on, one or more command syntax or
hardware errors have been detected. A record of up to 20 errors can be stored
in the function generator's error queue. See Appendix B, “Error Messages,”
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. When you have read all errors from the
queue, the
Errors LED turns off.
If more than 20 errors have occurred, the last error stored in the queue (the
most recent error) is replaced with -350, “Too many errors”. No additional
errors are stored until you remove errors from the queue. If no errors have
occurred when you read the error queue, the function generator responds
with +0, “No error”.
The error queue is cleared when power has been off or after a *CLS (clear
status) command has been executed. The *RST (reset) command does not
clear the error queue.
Use the following command to check for system errors:
SYSTem:ERRor?
Reads one error from the error
queue
Errors have the following format (the error string may contain up to 80
characters):
-113,"Undefined header"
Self-Test A power-on self-test occurs automatically when you turn on the function
generator. This limited test assures you that the function generator is
operational.
A complete self-test runs a series of tests and takes approximately
10 seconds to execute. If all tests pass, you can have a high confidence that
the function generator is fully operational.
If the self-test fails, the
Errors LED turns on the function generator should
be returned to Agilent Technologies for service.