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Chapter 5 215
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 OFF|ALERT|ON
: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.