R&S FSH
Network Analyzer Mode
Evaluating the Results
Operating Manual 1173.6275.12 - 30
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6.5.2 Configuring the Vertical Axis
Some results may not fit in the diagram area as it is configured in the default state of
the R&S FSH (for example measurements on amplifiers).
If you are performing measurements on an amplifier, you most likely have to change
the scaling of the vertical axis in order to see the complete transmission function.
The R&S FSH provides several ways to adjust the scaling of the vertical axis.
Changing the reference value
Changing the reference value works like an attenuation or gain in that it moves the
trace to another level. The R&S FSH adjusts the scale of the vertical axis accordingly.
The R&S FSH indicates the value and position of the current reference value with a
triangle at the vertical axis (
). In the default state, it is 0 dB and its position is the
grid line at the top of the diagram.
The reference value only changes the 0 dB reference without actually attenuating or
amplifying the signal level.
When changing the reference value, make sure that you do not overload the
R&S FSH. As long as the trace is completely within the diagram area and the
reference position at the top of the diagram, the risk of an overload is eliminated.
► Press the AMPT key.
► Press the "Ref" softkey.
The R&S FSH opens an input field.
► Enter the reference value you need to see the trace completely.
The R&S FSH moves the trace accordingly, relabels the vertical axis and shows
the new 0 dB reference in the hardware settings display.
