R&S FSH
Distance-to-Fault Mode (R&S FSH-K41)
Performing Cable and Antenna Measurements
Operating Manual 1173.6275.12 - 30
216
7.1 Performing Cable and Antenna Measurements
In order to get an idea about problems of a cable, you can analyze several aspects of
the signal.
7.1.1 Reflection Measurements
The reflection (S11) measurement is a good way to get an idea if the transmission
system works properly. If unusual amounts of signal power are being reflected, you
can guess that there is something wrong in the system. This measurement helps to
find reflections by displaying the magnitude of the reflections in dB in a specified
frequency range.
► Press the "Meas Mode" softkey.
► Select the "Reflection" menu item.
The R&S FSH starts the reflection measurement over its entire frequency range.
The figure shows an example of a reflection measurement without any major faults in
the cable or the antenna.
You can perform reflection
measurements on the complete
system or on individual components of
the system. If you measure while two
or more system components are
connected, the results of the reflection
measurement are an aggregate over
these components. Therefore you can
only see the aggregated magnitude of
the reflected power in a specified
frequency range.
To draw conclusions about which component is affected and determine the location of
the fault, you need to perform further analysis using other measurements.
