- 436          Keysight E4980A/AL User’s Guide
Error Messages
Warning Messages
-
Warning Messages
A warning message is displayed in the instrument status display area in the 
lower-left part of the display. Pressing any of the front keys other than the 
[Local/Lock] key or executing the :DISP:CCL command clears the message. 
This message simply appears on the display since it is not known to remote 
environments such as GPIB. This message is not displayed when another error 
message is already displayed in the instrument message/warning area.
The warning messages for this instrument are as follows.
Numeric
1 I bias unit
The E4980A/AL finds one current bias unit (42841A) connected.
2 I bias units
The E4980A/AL finds two current bias units (42841A) connected.
A
ALC unable to regulate
The voltage level setting is inappropriate for using the ALC function. The ALC 
function does not work and the operation will be the same as when the ALC 
function is turned off. The measurement data status is set to 4. Refer to 
“Automatic level control” on page 93.
C
Can't change while DCI Isolation OFF
This message appears when the DCI measurement range (DCI RND) is 
changed when the bias current isolation function is OFF. Turn on the Bias 
current isolation function.
Can't change while 2nd sweep param exists
This message appears when attempting to change or delete the list sweep 
parameter from the E4980A/AL’s screen after setting the sweep point for the 
second parameter with the GPIB command. Use the GPIB command to change 
the list sweep parameter.
Clear the table first
This error occurs when the value of MODE has been changed when the LIMIT 
TABLE SETUP screen is moved to another screen or the sweep parameter on 
the LIST SWEEP SETUP screen is changed even though a sweep list for 
another measurement parameter exists. Clear the table first.
Correction, not effective