Agilent Technologies E1300B - Manual (Page 60)

Note Enabling monitor mode slows instrument operations. If the timing or speed of
instrument operations is critical (such as making multimeter readings at a
precise time interval), you should not use monitor mode.
Table 3-1 shows the status annunciators that may appear in the bottom line of
the screen in monitor mode. Some instruments also have device-specific
annunciators (see the plug-in module manual for more information).
Reading Error Messages Whenever the screen is showing the err annunciator, an error has occurred for
the instrument being monitored. You can read the error message, although
doing so cancels monitor mode. To read an error message, type the following
SCPI command (followed by the Return key):
SYST:ERR?
The error message will be displayed in the bottom line of the Text Ouput Area.
To see if another error was logged, repeat the above command by pressing
UTILS, RCL_PREV, then Return.
After you have read all the error messages, executing the SYST:ERR?
command causes the screen to show: + 0 No error. After reading the error
message(s), press f1 to return to monitor mode.
Annunciator Description
mon The instrument is in monitor mode
bsy The instrument is executing a command
err An error has occurred (see “Reading Error
Messages” below)
srq A service request has occurred
Table 3-1. Monitor Mode Display Annunciators
3-12 Using the Display Terminal Interface