Agilent Technologies E4406A VSA manual Automatic Alignment, Calibration Comb Alignment

Language Reference

CALibration Subsystem

Calculate the gain error of 40 RF attenuator steps. The nominal setting of 10 dB is assumed to have 0 dB error.

The query performs the alignment and returns a zero if the alignment is successful.

Remarks:	A valid service password needs to be entered prior to
	sending the command.
Front Panel
Access:	System, Alignments, Align subsystem, RF

Automatic Alignment

:CALibration:AUTO OFFALERTON

:CALibration:AUTO?

Turns the automatic alignment routines on and off. When turned on, they are run once every 5 minutes, or if the ambient temperature changes by 3 degrees.

If alignment is turned off, the instrument may drift out of specification. The alert mode allows you to turn off the automatic alignment, but reminds you to when to run the alignment again. You will get a warning message if 24 hours has expired or the temperature has change by 3 degrees since the last alignment.

Factory Preset
and *RST:	Alert
	Your setting for the auto alignment is persistent and
	will remain the same even through an instrument
	power cycle.
Front Panel
Access:	System, Alignments, Auto Align

Calibration Comb Alignment

:CALibration:COMB

:CALibration:COMB?

Aligns the comb frequencies by measuring them relative to the internal 50 MHz reference signal.

The query performs the alignment and returns a zero if the alignment is successful.

Remarks:	A valid service password needs to be entered prior to
	sending the command.

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