Basic Operation
R&S
®
Cable Rider ZPH
57
User Manual 1321.0950.02 ─ 03
You can also define new cable models on the R&S Cable Rider ZPH or with the R&S
InstrumentView software and then transfer them to the R&S Cable Rider ZPH. For
more information, see
Chapter 7.2.1.3, "Creating a Cable Model"
In addition to the cable model, you should also specify the maximum distance to the
cable end.
1. Press the FREQ/DIST key.
2. Select the "Stop Dist" softkey.
The R&S Cable Rider ZPH opens an input field to specify the cable length.
3. Enter the maximum distance of the cable you are testing.
The range is from 3 m (10 ft) to 1500 m (4921 ft). The unit depends on the regional
settings. It is either meter or feet. For more information, see
The R&S Cable Rider ZPH uses the cable length to determine the ideal span for the
measurement and to scale the horizontal axis. For best results, the cable should be
specified 20% to 50% longer than the actual cable length.
Calibrating the test setup
Using the calibration kit (R&S FSH-Z28 or R&S FSH-Z29), the R&S Cable Rider ZPH
performs a "Full 1-Port" calibration over its entire span with 2501 sweep points. Thus, it
is not necessary to perform a new calibration after changing the frequency range or
cable length.
The R&S Cable Rider ZPH stores the calibration data in its memory. Thus, the calibra-
tion is valid after you change the operating mode or after you turn off the R&S Cable
Rider ZPH.
Before connecting the cable, you should calibrate the R&S Cable Rider ZPH to get the
best measurement results.
The R&S Cable Rider ZPH provides several calibration methods for cable measure-
ments. For more information on the methods refer to the
1. Press the CAL key.
2. Select the "Full 1-Port" softkey.
The R&S Cable Rider ZPH prompts you to connect a "Short", "Open" or a "Load" to
the measurement cable.
3. Firmly connect a "Short", "Open" or a "Load" to the output end of the cable.
Identifying Cable Faults
