4 System
4.6 Alignments
required” is generated, and bits 11 and 12 are set in the Status Questionable
Calibration register.
The query form of the remote commands (:CALibration[:ALL]? or *CAL?)
invokes the alignment of all subsystems and returns a success or failure value. An
interfering user signal is not grounds for failure; if the alignment was able to succeed
on all portions but unable to align the RF because of an interfering signal, the
resultant will be the success value.
Successful completion of Align Now All will clear the “Align Now All required” Error
Condition, and clear bit 14 in the Status Questionable Calibration register. It will also
begin the elapsed time counter for Last Align Now All Time, and capture the Last
Align Now All Temperature.
If the Align RF subsystem succeeded in aligning (no interfering signal present), the
elapsed time counter begins for Last Align Now, RF Time, and the temperature is
captured for the Last Align Now, RF Temperature. In addition, the Error Conditions
“Align RF skipped” are cleared, the Error Condition “Align Now, RF required” is
cleared, and bits 11 and 12 are cleared in the Status Questionable Calibration
register
Align Now All can be interrupted, by pressing the Cancel (ESC) front-panel key, or
remotely with Device Clear followed by the :ABORt SCPI command. When this
occurs, the Error Condition message “Align Now All required” is generated, and bit
14 is set in the Status Questionable Condition register. This is because new
alignment data may be employed for an individual subsystem, but not a cohesive set
of data for all subsystems.
In many cases, you might find it more convenient to change alignments to Normal,
instead of executing Align Now All. When the Auto Align process transitions to
Normal, the instrument will immediately start to update only the alignments that
have expired, thus efficiently restoring the alignment process.
Remote
Command
:CALibration[:ALL]
:CALibration[:ALL]?
Example
:CAL
Notes :CALibration[:ALL]? returns 0 if successful, or 1 if failed
:CALibration[:ALL]? is the same as *CAL?
While Align Now All is performing the alignment, the Calibrating bit (Bit 0 in the Status Operation
register) is set. Completion, or termination, will clear Bit 0 in the Status Operation register
This command is sequential; it must complete before further SCPI commands are processed.
Interrupting the alignment from remote is accomplished by invoking Device Clear followed by the
:ABORt command
Successful completion will clear bit 14 in the Status Questionable Calibration register
An interfering user signal is not grounds for failure of Align Now All. However, Bits 11 and 12 are set in
the Status Questionable Calibration register to indicate Align Now, RF is required
An interfering user-supplied signal will result in the instrument requiring an Align Now, RF with the
1809 Short Range Comms & IoT Mode User's &Programmer's Reference
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