6 System Functions
System
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 and set bit 12
if invoked with “Align Now, All required”.
Couplings Initializes the time for the Last Align Now, All Time.
Records the temperature for the Last Align Now, All Temperature.
Status Bits/OPC
dependencies
Bits 12 or 14 may be set in the Status Questionable Calibration register.
Initial S/W Revision Prior to A.02.00
RF
(In MXE the key label is “RF Only”)
Immediately executes an alignment of the RF subsystem . The instrument stops any measurement
currently underway, performs the alignment, then restarts the measurement from the beginning (similar to
pressing the Restart key).
This operation might be desirable if the alignments had been set to not include RF alignments, or if
previous RF alignments could not complete because of interference which has since been removed.
If an interfering user signal is present at the RF Input, the alignment will terminate and generate the Error
Condition message “Align skipped: 50 MHz interference” or “Align skipped: 4.8 GHz interference”, and
Error Condition “Align Now, RF required”. In addition, bits 11 and 12 will be set in the Status Questionable
Calibration register.
The query form of the remote commands (:CALibration:RF?) will invoke the alignment of the RF subsystem
and return a success or failure value. An interfering user signal is grounds for failure.
Successful completion of Align Now, RF will begin the elapsed time counter for Last Align Now, RF Time,
and capture the Last Align Now, RF Temperature.
Align Now, RF 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,
RF required” is generated, and bit 12 is set in the Status Questionable Condition register. None of the new
alignment data is used.
In models with the RF Preselector, such as the N9038A, the RF alignment will execute an alignment of the
RF subsystem of the Spectrum Analyzer, as well as the RF subsystem on RF Preselector path.
Key Path
System, Alignments, Align Now
Mode All
Remote Command
:CALibration:RF
:CALibration:RF?
Example :CAL:RF
Notes :CALibration:RF? returns 0 if successful
300 EMI Receiver Mode Reference
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