Agilent Technologies X Series Manual page 163

The , setting is rarely the best choice, because
Auto Align Off
in throughput while maintaining the warranted performance for a much longer time. The
intended for unusual circumstances such as the measurement of radar pulses where you might like the
revisit time to be as consistent as possible.
When Auto Align , Off is selected the Auto Align Off time is initialized and the elapsed time counter
begins.
When Auto Align , Off is selected the Settings Panel indicates ALIGN OFF with a warning icon. The
warning icon is to inform the operator that they are responsible for maintaining the warranted operation
of the instrument:
Key Path
Mode
Example
Notes
Couplings
Readback Text
Initial S/W Revision
All but RF
Auto Align , All but RF , configures automatic alignment to include or exclude the RF subsystem.
(Eliminating the automatic alignment of the RF subsystem prevents the input impedance from changing.
The normal input impedance of 50 ohms can change to an open circuit when alignments are being used.
Some devices under test do not behave acceptably under such circumstances, for example by showing
instability.) When
Auto Align
Align Now , RF when RF-related alignments expire. The
operator to perform an
Align Now
exceeded.
When ,
Auto Align All but RF ON
warning icon (warning icon is intended to inform the operator they are responsible for the maintaining
the RF alignment of the instrument):
Key Path
Mode
Remote Command
Example
Preset
Preset
System, Alignments, Auto Align
All
:CAL:AUTO OFF
Auto Align Off begins the elapsed time counter for Auto Align Off time.
Auto Align is set to Off if Restore Align Data is invoked.
Off
Prior to A.02.00
, is selected, the operator is responsible for performing an
All but RF ON
, when the combination of time and temperature variation is
All
is selected the Settings Panel indicates ALIGN AUTO/NO RF with a
System, Alignments, Auto Align
All
:CALibration:AUTO:MODE ALL|NRF
:CALibration:AUTO:MODE?
:CAL:AUTO:MODE NRF
ALL
This is unaffected by Preset but is set to ALL on a "Restore System
Defaults->Align".
gives almost the same improvement
Partial
Auto Align , Alert mechanism will notify the
System Functions
System
choice is
Off
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