Cable and Antenna Test Mode
R&S
®
Cable Rider ZPH
104
User Manual 1321.0950.02 ─ 03
The R&S Cable Rider ZPH displays the submenu to select the measurement for-
mat.
3. Select "Return Loss" or "SWR".
The R&S Cable Rider ZPH calculates the distance to cable faults.
If you are measuring the cable only, make sure to terminate the other end into a load.
shows an example of a DTF measurement in magnitude and SWR mea-
surement format. The peaks that the trace shows at the marker positions are possible
faults. Depending on the distance, you can also get an idea of the component that is
defective.
Marker 1, M1 for example, shows a defect in the cable. Marker 2, M2 shows a fault at
the end of the cable, probably a bad or loose connection.
Figure 7-4: Distance to fault measurement
Split screen
Using split screen, you can display the DTF measurement in both time and frequency
domain. The main DTF measurement is displayed in the upper screen window (time
domain) and the reflection measurement is displayed in the lower screen window (fre-
quency domain). The Y-axis on both screen window depends on the selected mea-
surement format (Magnitude or SWR) in DTF measurement.
The marker and limit line controls are independent for each screen window. The mark-
ers or limit lines shown in the
are measurement performed
by the selected screen window. See
1. Press the MEAS key.
2. Select the "DTF" softkey.
The R&S Cable Rider ZPH displays the submenu to select the measurement for-
mat.
3. Enable the checkbox for "Split Screen" menu item.
The R&S Cable Rider ZPH displays the DTF measurement in the top screen win-
dow and the reflection measurement in the bottom screen window.
4. Tap on the desire trace window to select the screen window.
The selected screen window is highlighted with a blue frame around the screen
window. Alternatively, you can select the trace to identify the screen window
Performing Cable and Antenna Measurements
