4 System
4.6 Alignments
Interrupting the alignment from remote is accomplished by invoking Device Clear followed by the
:ABORt command
A failure encountered during alignment generate the Error Condition message “Align LO failed” and
sets Bit 5 in the Status Questionable Calibration register. Successful completion clears the “Align LO
failed” message and Bit 5 in the Status Questionable Calibration register
Dependencies This control does not appear unless option EXM is present and is grayed-out, unless a USB mixer is
plugged in to the USB
Status Bits/OPC
dependencies
Bit3 may be set in the Status Questionable Calibration Extended Failure register
4.6.2.9 Align Source
Accesses source alignment processes that are immediate action operations. They
perform complete operations and run until they are complete.
The instrument stops any sequence of the source, performs the alignment, then
restarts the sequence from the beginning.
Note: This alignment corrects slow-rate drift, which does not impair specifications
for time periods shorter than one week. Thus, it is required to perform this alignment
on a weekly basis to maintain specifications. This alignment typically takes >2
minutes to complete.
There is no alert available for the source alignment. Operators are responsible for
checking temperature shift since the last Align Now Source to determine whether
the source alignment needs to be executed.
Remote Command
:CALibration:INTernal:SOURce[:ALL]
:CALibration:INTernal:SOURce[:ALL]?
Example
:CAL:INT:SOUR
Notes :CAL:INT:SOUR? Initiates an Alignment and returns 0 if successful, or 1 if failed
Dependencies Only appears in VXT models M9410A/11A
Couplings Initializes the time for the Last Align Source Now, All Time
Records the temperature for the Last Align Source Now, All Temperature
Overlapped Command
Remote Command
:CALibration:INTernal:SOURce[:ALL]:NPENding
Example
:CAL:INT:SOUR:NPEN
Notes :CALibration:INTernal:SOURce[:ALL]:NPENding is the same as :CALibra-
tion:INTernal:SOURce[:ALL], including all conditions and status register bits, except that
this SCPI command does not block the SCPI session, so you should use status register bits to query
whether the calibration is successfully completed or not
Typical usage is:
1817 Short Range Comms & IoT Mode User's &Programmer's Reference