R&S 1129.7246.03, Operating Manual

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Operating Manual 1302.6163.12 - 03 4.143
R&S ESU Instrument Functions
Analyzer Mode
4.8.9 Recording the Correction Data – CAL Key
The R&S ESU obtains its high measurement accuracy through its inbuilt self-align-
ment method.
The correction data and characteristics required for the alignment are determined by
comparison of the results at different settings with the known characteristics of the
high-precision calibration signal source of R&S ESU at 128 MHz. The correction
data are then available in the instrument as a file and can be displayed by means of
the
CAL RESULTS softkey.
For service purposes the use of correction data can be deactivated by means of the
CAL CORR ON/OFF softkey. If the correction data recording is aborted, the last
complete correction data set is restored.
The CAL key opens a menu with the available functions for recording, displaying
and activating the data for self alignment.
CAL
CAL TOTAL The CAL TOTAL softkey starts the recording of correction data of the instrument.
If the correction data recording has failed or if the correction values are deactivated
(
CAL CORR = OFF softkey), UNCAL is displayed in the status field.
Remote command:
*CAL?
CAL ABORT The CAL ABORT softkey interrupts the recording of correction data and restores the
last complete correction data set.
Remote command:
CAL:ABOR
CAL CORR
ON | OFF The CAL CORR ON/OFF softkey switches the calibration data on/off.
• ON: The status message depends upon the results of the total calibration.
• OFF: The message UNCAL appears in the status line.
Remote command:
CAL:STAT ON
YIG CORR
ON | OFF The YIG CORR ON/OFF softkey switches on or off the automatic, cyclic correction
of the temperature-dependent frequency drift of the YIG filter.
The term "Calibration" formerly used for the integrated self alignment was often
mistaken for the "true" calibration of the instrument at the test set in production and
in service. It is therefore no longer used although it appears in the abbreviated
form in the name of keys ("CAL...").
CAL TOTAL
CAL ABORT
CAL CORR ON | OFF
YIG CORR ON | OFF
CAL RESULTS
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