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KS91 sends an amplitude correction value to the controller. This correction value improves measurement accuracy
when it is subtracted from the amplitude measured by the analyzer.
The analyzer compiles the KS91 correction value from calibration data stored in its memory by the KSW com-
mand, the error correction routine. When the KS91 command is executed, the correction value is compiled from
those parts of the KSW data that apply to the present instrument state. Execute KSW before KS91 to ensure the
correction value is based on recent KSW data. Execute KS91 immediately after making your amplitude measure-
ment to ensure the correction value is based on the right instrument settings.
The KSX (Use Correction Data) command puts the analyzer into a "corrected" mode. In this mode the analyzer
automatically corrects its measurements with the data collected by the KSW command. The KSX command
makes amplitude corrections by adjusting the IF gain. Because of the inaccuracies inherent in changing the IF gain,
the correction mode established by the KSX command is up to 0.4 dB less accurate than the external mathemati-
cal correction made with the KS91 correction value.
The following program gives a sample readout of the KS91 correction value.
10
2 0
!
amplitude measurement routine
Any
30
!
4 0
718 USING "K,B";"KS";91
OWTJT
60
ENTER 718;E
70
PRINT "AMPLITUDE ERROR IS ";E;" dB"
E N D
8 0
The correction value stored in variable E improves the amplitude measurement accuracy when it is subtracted from
the measured amplitude.
The KS91 command cannot be executed from the front panel
This is the decimal ASCII equivalent and is transmitted to the analyzer as a single E&bit byte.
l
KS
91
KS91
Read Amplitude Error
P r o g r a m m i n g 2 0 3
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