Basic Operation
R&S
®
Cable Rider ZPH
80
User Manual 1321.0950.02 ─ 07
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 Cable Rider ZPH, 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).
1. Press the "REF" softkey at the "Parameter view".
The R&S Cable Rider ZPH opens an entry box to enter the reference level.
2. Enter a reference level of -25 dBm.
The R&S Cable Rider ZPH reduces the reference level by 5 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.
Using markers
The R&S Cable Rider ZPH has markers to read out signal levels and frequencies.
Markers are always positioned on the trace. Both the level and frequency at their cur-
rent positions are displayed on the screen.
► Press the [MARKER] key.
The R&S Cable Rider ZPH activates a marker and puts it on the maximum value
on the trace. The coordinates of the marker are shown in a table above the mea-
surement diagram.
A red vertical line represents the position of the marker on the horizontal axis (i.e.
the frequency). A small red horizontal dash represents the marker position on the
vertical axis (i.e. the level).
Using the Spectrum Analyzer
