User`s guide

Features and Functions 2
34980A User’s Guide 71
• The default values for the upper and lower alarm limits are “0”.
The lower limit must always be less than or equal to the upper limit,
even if you are using only one of the limits.
• For details on configuring alarms on the digital modules, see “Using
Alarms With the Digital Modules” on page 76.
• A Factory Reset (
*RST command) clears all alarm limits and turns off
all alarms. An Instrument Preset (SYSTem:PRESet command) or
Card Reset (SYSTem:CPON command) does not clear the alarm limits and
does not turn off alarms.
Front Panel Operation: Alarm > LOW LIMIT > HIGH LIMIT > THIS CHANNEL ALARM
After selecting the lower and upper limit for the selected channel, assign
one of the four alarm numbers. Note that the instrument does not start
evaluating the alarm conditions until you exit the Alarm menu.
Remote Interface Operation: To assign the alarm number to report any
alarm conditions on the specified channels, use the following command
(if not assigned, all alarms on all channels are reported on Alarm 1
by default).
OUTPUT:ALARM2:SOURCE (@2001,2012)
To set the upper and lower alarm limits on the specified channels,
use the following commands.
CALC:LIMIT:UPPER 5.25,(@2001,2012)
CALC:LIMIT:LOWER 0.025,(@2001,2012)
To enable the upper and lower alarm limits on the specified channels,
use the following commands.
CALC:LIMIT:UPPER:STATE ON,(@2001,2012)
CALC:LIMIT:LOWER:STATE ON,(@2001,2012)