Agilent Technologies X Series Manual page 185

Dependencies
Couplings
Initial S/W Revision
Timebase DAC
Allows control of the internal 10 MHz reference oscillator timebase. This may be used to adjust for
minor frequency alignment between the signal and the internal frequency reference. This adjustment has
no effect if the instrument is operating with an External Frequency Reference.
If the value of the Timebase DAC changes (by switching to Calibrated from User with User set to a
different value, or in User with a new value entered) an alignment may be necessary. The alignment
system will take appropriate action; which will either invoke an alignment or cause an Alert.
Key Path
Mode
Remote Command
Example
Notes
Preset
Preset
State Saved
Initial S/W Revision
Calibrated
Sets the Timebase DAC to the value established during factory or field calibration. The value displayed
on the menu key is the calibrated value.
Key Path
Mode
Example
Readback Text
Initial S/W Revision
This key does not appear in models that do not contain preselectors. In these
models the SCPI command is accepted without error but no action is taken.
Initializes the time for the Last Characterize Preselector Time.
Records the temperature for the Last Characterize Preselector Temperature.
Prior to A.02.00
System, Alignments
All
:CALibration:FREQuency:REFerence:MODE CALibrated|USER
:CALibration:FREQuency:REFerence:MODE?
:CAL:FREQ:REF:MODE CAL
If the value of the timebase is changed the alignment system automatically
performs an alignment or alerts that an alignment is due.
If the value of the timebase is changed the alignment system automatically
performs an alignment or alerts that an alignment is due.
CAL
This is unaffected by Preset but is set to CALibrated on a "Restore System
Defaults->Align".
No
Prior to A.02.00
System, Alignments, Timebase DAC
All
:CAL:FREQ:REF:MODE CAL
[xxx] < where xxx is the calibrated value
Prior to A.02.00
System Functions
System
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