Cable and Antenna Test Mode
R&S
®
Cable Rider ZPH
109
User Manual 1321.0950.02 ─ 03
● "Elect Length Offset" - Offset length is used in compensation of the phase shift
of S11.
● "Auto Length" - Take the "Electrical Length" and apply it as an "Elect Length
Offset", i.e. if the "Elect Length Offset" is zero, the current "Electrical Length"
value is added to the "Elect Length Offset" value.
7.1.6 Calibrating Measurements
In its default state, the R&S Cable Rider ZPH uses factory calibration. Factory calibra-
tion is a full 1-port calibration over the current frequency range (i.e. span) of the R&S
Cable Rider ZPH. When factory calibration is active, the status line reads (dcal). In
many cases, this calibration already provides accurate results.
To get the best and most accurate results, you have to calibrate the measurement. The
R&S Cable Rider ZPH provides several calibration methods. You will need one of the
available calibration standards R&S FSH-Z28 / Z29 (order number. 1300.7810.03 /
1300.7610.03) or
, R&S ZN-Z103 (order number: 3586.9392.00).
To successfully calibrate the test setup, you have to connect the calibration standard at
the reference plane, usually the output of the RF measurement cable.
Calibration is performed over the R&S Cable Rider ZPH entire frequency range (full
span). This full span calibration eliminates the need for recalibration when you change
a parameter or select a different cable or DUT.
Calibration also remains valid after turning off the R&S Cable Rider ZPH or changing
into another operating mode as calibration data is saved in the internal memory of the
R&S Cable Rider ZPH. If you save the measurement in a dataset, calibration data is
part of that dataset. When you restore the dataset and perform the same measurement
again, you do not have to recalibrate the R&S Cable Rider ZPH. See
"Presetting the R&S Cable Rider ZPH"
Performing Cable and Antenna Measurements
