Agilent Technologies 8960 10 Series Reference Manual page 576

Error Messages
Description
Reading Error Messages
Each error message that is generated is recorded in either the error/event queue or the message log or both.
Error messages are shown in a message window at the center of the test set's display.
When an error message is displayed an audio beep occurs, the beeper state of the test set can be set to on or off.
The error/event queue is read remotely using the SYSTem:ERRor? query. The error/event queue is able to hold
100 messages. To read the entire error/event queue use the following program.
10 DIM Err_msg$[255]
20 REPEAT
30 OUTPUT 714;"SYSTEM:ERROR?"
40 ENTER 714; Err_num,Err_msg$
50 PRINT Err_num,Err_msg$
60 UNTIL Err_num = 0
The message log may be viewed on the test set's display by pressing the SYSTEM CONFIG screen's Message
Log key. The message log can display up to 24 entries over two pages.
Error messages can be cleared from the test set's display using the DISPlay:WINDow:ERRor:CLEar
command. Pressing any functional front panel key, i.e. the LOCAL key, will clear an error message for the test
set's display.
Classes of Errors
Error messages are divided into classes, each class of error is handled differently by the test set. The message
log is cleared when the test set is power cycled.
Measurement Integrity Errors These errors occur while a measurement is being performed. They
indicate something happened during the measurement to invalidate the result, or make the integrity indicator
return a questionable result. These errors can be read by using the FETCh command, for a given
measurement.
Non-Persistent Errors These messages are generated when a condition occurs that is incorrect, but has no
serious or long lasting effect on the test set's operation. Examples could include an out of range value to a
parameter, or an invalid GPIB mnemonic. The message window is cleared when any front panel key is
pressed.
Persistent Errors These errors are generated when a non-transitory error condition exists. Persistent errors
occur when a hardware failure is found, or when damage or injury to a person or the test set may occur.
The test set displays these errors in the error message window and as a prompt at the bottom of the display
screen where it remains until the error condition no longer exists.
Fatal Errors When these errors occur no further operation of the test set is possible without cycling the
power switch. Fatal errors are not saved in the error message log. The test set display will provide the user
with information about what to do next and some details about what the test set was doing when the fatal
error occurred.
Maskable Messages These messages are intended to inform the user of a condition within the test set. They
are generally meant to provide information to the user. The user will need to decide if this condition is
undesirable and if they want the message to appear.
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