R&S SMU200A Adjustments
1007.9845.82 2.1 E-4
2 Adjustments
T
his chapter describes all necessary measures to restore the performance of the R&S SMU after
module replacement.
There are no manual adjustments to be performed. Internal and external adjustment routines are
implemented for this purpose.
Preliminary Remark
Setting a defined initial state by pressing the
PRESET key prior to adjustments is recommended.
To ensure that the internal adjustments are valid at operating temperature, at least 30 minutes warm-
up time at this temperature must be observed.
Internal Adjustments
All internal adjustments are available in the Setup/Internal Adjustments menu (see operating manual).
External Adjustments Requiring Measurement Equipment
The external adjustments require calibrated equipment and special software. Data sheet specifications
of the unit are concerned. If required, contact your local Rohde & Schwarz representative.
External Level Correction
The measuring program for external level correction measures output power over frequency and level
and stores the correction values inside the R&S SMU to maintain level accuracy.
I/Q Skew Correction, Modulation Frequency Response Correction
This program performes
• measurements on mirror sideband suppression for I/Q skew correction,
• measurements of modulation frequency response over center frequency and level
• and stores the correction values inside the R&S SMU to improve the performance of internal
baseband I/Q modulation.
Adjustments of the Complete Unit
Performing Setup/Internal Adjustments/Adjust All activates all internal adjustments in a reasonable
order.
The external adjustments have to be performed, if the recommended calibration interval is exhausted.
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