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2635A
Users Manual
4-40
Table 4-5. Command and Query Reference (cont)
LOCK Lock and unlock the instrument front panel control keys. The LOCK modes disable
the front panel keys, while placing the instrument in either REVIEW (LOCK 1),
MONITOR (LOCK 2) or Configuration Lock (LOCK 3). This limits instrument
operation to a specific mode and prevents unauthorized configuration changes. Only
supervisory personnel should be aware that the
F and B keys can be used to
toggle the LOCK modes on and off, except for LOCK 3, which is reset from the
computer interface only or by loading a non-LOCK 3 setup file.
LOCK modes 1 and 2 are not saved/restored in configuration files. If one of these
modes is active when FILE_STORE is performed, mode 0 (unlocked) is stored in the
file.
LOCK <mode>
<mode> = 0,1,2,3
LOCK 0 Unlock the front panel and turn off the REM (remote) annunciator.
All key functions are enabled. This command is used to clear
a LOCK 1, LOCK 2, or LOCK 3 condition.
LOCK 1 Lock the front panel in the REVIEW mode and turn on the REM
(remote) annunciator. Only the up/down and left/right arrow
keys are unlocked to allow the review of the minimum,
maximum, and last values of any channel. The front panel can be
unlocked by using the LOCK 0 command, or by simultaneously
pressing the front panel F and
B keys. The F and B
keys can be used toggle between the locked and unlocked
modes, while in REVIEW.
LOCK 2 Lock the front panel in the MONITOR mode (which must be active
or the command will generate an execution error) and turn on the
REM (remote) annunciator. Only the up/down arrow keys are
unlocked to allow the monitoring of any channel. The front panel
can be unlocked by using the LOCK 0 command, or by
simultaneously pressing the front panel F and
B keys. The
F and b keys can be used to toggle between the locked
and unlocked modes, while in MON.
LOCK 3 Lock the channel configuration. The instrument operates normally
except keys used to configure a channel are disabled, that is , the
configuration is locked. A configuration file can be loaded; scan
can be turned on/off, monitor on/off, and review on/off. Exit this
mode using the power-up configuration-reset sequenced from the
instrument front panel or load a configuration file that has lock-
out disabled.
The four LOCK states are nonvolatile. If power is interrupted, the instrument retains
the last LOCK setting.