6 System Functions
System
elapsed time counter for Last Characterize Preselector Time, and capture the Last Characterize
Preselector Temperature.
The last Characterize Preselector Time and Temperature survives across the power cycle as this operation
is performed infrequently.
The Characterize Preselector function can be interrupted by pressing the Cancel (ESC) front-panel key or
remotely with Device Clear followed by the :ABORt SCPI command. None of the new characterization data
is then used. However, since the old characterization data is purged at the beginning of the
characterization, you now have an uncharacterized preselector. You should re-execute this function and
allow it to finish before making any further preselected measurements.
Key Path
System, Alignments, Advanced
Mode All
Remote Command
:CALibration:YTF
:CALibration:YTF?
Example :CAL:YTF
Notes :CALibration:YTF? returns 0 if successful
:CALibration:YTF? returns 1 if failed (including interfering user signal)
While Advanced, Characterize Preselector is performing the alignment, bit 0 in the Status Operation
register is set. Completion, or termination, will clear bit 0 in the Status Operation register.
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 9 in the Status Questionable Calibration register.
A failure encountered during alignment will generate the Error Condition message “Characterize
Preselector failed” and set bit 9 in the Status Questionable Calibration register.
For Options that support frequencies > 3.6 GHz only.
Dependencies 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.
Couplings Initializes the time for the Last Characterize Preselector Time.
Records the temperature for the Last Characterize Preselector Temperature.
Initial S/W Revision Prior to A.02.00
Characterize Reference Clock
Characterizing the reference clock is calibrating the Reference Input Phase with the External Reference
Output. This feature is only available when either option DP2 or B40 is present. It requires connecting the
10 MHz OUT to the EXT REF IN port with a BNC cable before running the characterization.
See "Front panel guided calibration sequence" on page 318
Key Path
System, Alignments, Advanced
Mode All
316 EMI Receiver Mode Reference
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