5520A
Operators Manual
6-18
Example: EXPLAIN? 539 returns “Can’t change compensation now.”
Returns the explanation of error 539: “Can’t change compensation now.”
EXTGUARD
Overlapped CoupledIEEE-488 RS-232 Sequential
xx xxx
(External guardcommand) Connects or disconnects the internal guard shield from the LO
binding post.
Parameter: ON (external guard is on, i.e. external)
OFF (external guard is off, i.e. internal)
Once set, the Calibrator retains the external guard setting until power off or reset.
Example: EXTGUARD ON
EXTGUARD?
Sequential Overlapped
Coupled
IEEE-488 RS-232
x x xx
x
(External guard query) Returns whether the internal guard shields are connected or
disconnected from earth
(chasis) ground.
Response: (character) ON (external guard is on, i.e., external)
(character) OFF (external guard is off, i.e., internal)
Example: EXTGUARD? returns ON
FAULT?
Sequential Overlapped
Coupled
IEEE-488 RS-232
x x xx
x
(Fault query) Returns the first error code contained in the Calibrator error queue, then
remove that error from the queue. After obtaining the error code, use the EXPLAIN?
command to view an explanation. A zero value is returned when the error queue is
empty. To read the entire contents of the error queue, repeat FAULT? until the response
is 0. (Only system errors appear in the error queue.)
Response: <value> of the error code
Example: FAULT? returns 539
Returns the first error code in the error queue, number 539. To view an explanation of
the error, enter the command EXPLAIN? 539.