Common Measurement Settings
R&S
®
FSW
356User Manual 1173.9411.02 ─ 19
Compensating the effects of additional attenuation after calibration
After calibration, an additional attenuator is inserted between the DUT and the
R&S FSW. This may be necessary, for example, to protect the analyzer's input con-
nector. Nevertheless, we are only interested in the effects of the DUT, not those of the
additional protective attenuator. Thus, we will compensate these effects in the result
display on the R&S FSW by moving the reference line.
1.
Connect a 3 dB attenuator between the band elimination filter output and the RF
INPUT connector on the R&S FSW.
The measurement results are now 3 dB lower.
Fig. 6-11: Measurement results with additional attenuator
2.
In the "Source Calibration" tab, enter "Reference Value":-3
dB.
The reference line is shifted down by 3 dB so that the measurement trace is dis-
played on the reference line again.
At the same time, the scaling of the y-axis is changed: -3 dB are now shown at
50% of the diagram; the range is [-53
dB to +47
dB].
Data Input and Output
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