R&S ZVH
Getting Started
Using the Spectrum Analyzer (Option R&S ZVH-K1)
Quick Start Guide 1309.6900.12 - 06
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Setting the reference level
The level at the top of the measurement diagram is called the reference level. To
obtain the best dynamic range from the R&S ZVH, you should use its full level range.
That means that the maximum level value should be at or close to the top of the
measurement diagram (= reference level).
► Press the SCALE/AMPT key.
► Press the "Ref Level" softkey.
► Enter a reference level of -30 dBm.
The R&S ZVH reduces the reference level by 10 dB.
The maximum trace value is close to the maximum scale value of the measurement
diagram. The increase in the displayed noise floor is minimal. The difference between
the signal maximum and the displayed noise (i.e. the dynamic range) has, however,
been increased.
Measuring the frequency
The trace consists of 631 measurement points (frequency points). The marker is
always positioned on one of these measurement points. The R&S ZVH calculates the
marker frequency from the frequency of the measurement point, the center frequency
and the frequency span that have been set. The measurement-point resolution, and
consequently the accuracy of the marker frequency readout, therefore depend on the
frequency span that has been selected.
The R&S ZVH has a frequency counter to increase the accuracy of the marker-
frequency readout. It stops the sweep at the marker position, counts the frequency and
then continues the sweep.
► Press the MARKER key.
► Press the "Marker Function" softkey.
► Select the "Frequency Count" menu item.
The marker label "M" turns to a "C" to indicate an active frequency counter. When
the frequency counter is active, the resolution of the frequency readout is always
1 Hz, regardless of the span. The accuracy is determined by the internal reference
frequency which is far more exact than that of the pixel-oriented marker readout.
