R&S ZVH Spectrum Analyzer Mode (R&S ZVH-K1)
Configuring Spectrum Measurements
Operating Manual 1309.6946.12 - 09 127
4.2.2.2 Setting a Display Range
The display range determines the scaling or resolution of the vertical axis. In the
default state, the display range is a logarithmic scaling over a 100 dB. This
corresponds to 10 dB per grid division. The R&S ZVH provides other display ranges
that either increase or decrease the resolution of the vertical axis.
However, increasing resolution does not increase the accuracy of, for example, the
marker level readout, but only makes it easier to read values off the trace.
You can also select a linear scale for the vertical axis. In that case, the power levels
are expressed as a percentage of the reference level. Linear scaling is useful to
display AM modulated carriers in the time domain, for example.
► Press the SCALE/AMPT key.
► Press the "Range / Ref Pos" softkey.
The R&S ZVH opens a submenu to select the display range.
► Select the display range you need (“Manual Range” allows you to select a custom
range).
The R&S ZVH adjusts the vertical axis accordingly.
4.2.2.3 Selecting the Display Unit
By default, the vertical axis (and therefore the reference level) is scaled in dBm.
However, the units dBmV, dBµV, Watt and Volt are also available. Selecting the right
unit is relevant for the marker level display because the unit of the marker level is the
same as that of the reference level.
► Press the SCALE/AMPT key.
► Press the "Unit" softkey.
The R&S ZVH opens a submenu to select the display unit.
► Select one of the available units.
The R&S ZVH adjusts the labels of the vertical axis accordingly.
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