Operating Manual EMI TEST RECEIVER ESIB7 - Rohde & Schwarz

Calibration
ESIB
EMI
PRESEL
The EMI PRESEL softkey calibrates the frequency response of the
preselector and the preamplifier.
IEC/IEEE- bus command ::CALibration:PRESelector?
PRESEL
PEAK
The PRESEL PEAK softkey optimizes the tuning of the preselector for input
signals in the frequency range above 7 GHz.
This calibration should be used whenever signal levels in the frequency range
above 7 GHz are to be measured and high accuracy is desired.
If a marker is not active when the PRESEL PEAK softkey is pressed, marker
1 is activated as the reference marker and placed on the signal maximum in
the active trace. Otherwise the active marker is used.
The following window is displayed on the screen while the peaking function is
running. The function can be aborted at any time using the ABORT line. In
this case, the correction value determined at the factory is restored.
SYSTEM MESSAGE
PEAKING
ABORT
The input signal’s signal-to-noise ratio must be at least 10dB in order that the
peaking function runs properly. Otherwise, the preselector may be set
incorrectly, which would cause level errors by subsequent measurements.
If the instrument setting (start/stop frequency, sweep time) is changed after
PRESEL PEAK has been called, the correction value for the preselector
determined by the function is no longer used. Instead, the correction value
determined at the factory is restored.
IEC/IEEE- bus command
:CALibration:PPEak?
CAL CORR
ON OFF
The CAL CORR ON/OFF softkey switches the correction data on/off.
ON The status message depends upon the results of the total correction
OFF The message UNCAL appears in the ESIB status line.
IEC/IEEE- bus command :CALibration:STATe ON | OFF
1088.7531.12 4.12 E-15