Basic Operation
R&S
®
Cable Rider ZPH
75
User Manual 1321.0950.02 ─ 07
3. Enter 10 MHz as the start frequency.
The R&S Cable Rider ZPH adjusts the frequency range according to your settings.
4. Select the "Stop" softkey.
The R&S Cable Rider ZPH opens an input field to specify the stop frequency.
5. Enter 200 MHz as the stop frequency.
The R&S Cable Rider ZPH adjusts the frequency range according to your settings.
Note that the distance from start to stop frequency has to be equal to the span. The
R&S Cable Rider ZPH adjusts the values if you enter a frequency range that is not the
same as the span.
Calibrating the measurement
For transmission measurements you have to perform a 2-port normalization to get the
best results.
1. Press the [CAL/SPAN] key.
2. Select the "Normalize Trans" softkey.
The R&S Cable Rider ZPH prompts you to replace the "DUT" by a "THROUGH"
connection.
3. Firmly connect a "Through" connection on both ports.
4. Proceed with "Continue" softkey to start the calibration.
After finishing the calibration routine, the R&S Cable Rider ZPH displayed the mes-
sage "Calibration done".
The R&S Cable Rider ZPH is now calibrated and a "(cal)" status is displayed next
to the measurement format, i.e.
. See
Measurement Trace Window
.
Transmission measurement
Reconnect the filter to the port of the R&S Cable Rider ZPH.
1. Press the [MEAS] key.
2. Select the "Transmission" softkey.
The R&S Cable Rider ZPH now shows the (corrected) characteristics of the low-
pass filter.
Measuring Transmissions
