Cable and Antenna Test Mode
R&S
®
ZNH
112
User Manual 1334.5985.02 ─ 02
3. Define the required parameters to export the S-parameter file:
● "Frequency Unit": Frequency unit of spectrum ("Hz", "kHz", "MHz", "GHz")
● "Parameter Format": Select the exported
on the measure-
ment ("Real - Imaginary", "dB Mag - Phase", "Lin Mag - Phase")
● "File Format": s1p or s2p file format
4. Select "Save" to save the export configuration.
The R&S
ZNH opens the file manager dialog.
5. Select the storage device and folder that you want to save the data.
6. Enter a filename in the input field of "Save Dataset" dialog box.
The default filename is "Measurementxxx" which "xxx" is the new number in
ascending order.
The file extension for the S1P and S2P is
*.s1p
and
*.s2p
respectively.
7. Press the rotary knob to confirm the entry.
The R&S
ZNH saves the file.
8. To delete the file, see
Chapter 5.8.3, "Deleting Datasets"
7.1.2
Distance to Fault Measurements
The distance to fault (DTF) measurement determines the exact location of possible
faults in a transmission system. If you connect the end of the cable to the R&S
ZNH,
the DTF measurement shows you the exact distance to the fault (in meter or feet),
regardless by what the fault is caused. In addition, the measurement shows the degree
of the fault in dB. From this information, you can determine the component that has the
fault and its seriousness.
In order to determine the distance to a cable fault, the R&S
ZNH measures the reflec-
tions of the cable under test in the frequency domain. The R&S
ZNH first determines
the magnitude of the reflections for a particular frequency by comparing the phase of
the reflected signal and a reference signal created by the signal source. It then per-
forms an inverse fast fourier transformation (IFFT) on the signal that has been
Performing Cable and Antenna Measurements