Agilent Technologies Signal Analyzer N9030a - Manual (Page 1269)

6 RLC Swept SA Measurement Front-Panel & SCPI Reference
System
Key Path System, Alignments
Initial S/W Revision Prior to A.02.00
All
Immediately executes an alignment of all subsystems. The instrument stops any measurement
currently underway, performs the alignment, then restarts the measurement from the beginning
(similar to pressing the Restart key).
If an interfering user signal is present at the RF Input, the alignment is performed on all
subsystems except the RF. After completion, the Error Condition message “Align skipped: 50 MHz
interference” or “Align skipped: 4.8 GHz interference” is generated. In addition the Error
Condition message “Align Now, RF 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 skipped: 50 MHz interference” and
“Align skipped: 4.8 GHz interference” 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 analyzer will
immediately start to update only the alignments that have expired, thus efficiently restoring the
alignment process.
In models with the RF Preselector, such as the N9038A, the Align Now All alignment will
immediately execute an alignment of all subsystems in the Spectrum Analyzer and partial
subsystems of the RF Preselector. The additional alignments are the System Gain, Mechanical
Remote Language Compatibility Measurement Application Reference 1269