Basic Operation
R&S
®
Cable Rider ZPH
64
User Manual 1321.0950.02 ─ 03
2. Disconnect the power sensor from any signal sources.
3. Select the "Continue" softkey to start zeroing.
The R&S Cable Rider ZPH starts the zeroing process.
4. Wait for the zeroing process to finish.
After zeroing is done, the R&S Cable Rider ZPH displays the message "Power
sensor zero done" and again shows the power sensor softkey menu.
5. Connect the DUT to the power sensor.
The R&S Cable Rider ZPH shows the measured power level in dBm. See
.
Set the frequency
To get the best results, enter the frequency of the signal under test.
1. Select the "Freq" softkey.
The R&S Cable Rider ZPH opens an entry box to enter the frequency.
2. Enter the frequency of the signal.
3. Confirm the entry with one of the unit keys.
The R&S Cable Rider ZPH transfers the new frequency to the power sensor which
then corrects the measured power readings.
4.6.1.2
Measuring Power and Return Loss
With the directional power sensors R&S FSH-Z14 and R&S FSH-Z44, you can mea-
sure the power in both directions.
When you connect the directional power sensor between the source and the load, the
R&S Cable Rider ZPH measures the power from the source to load (forward power)
and from the load to source (reverse power).
The ratio between the forward and reverse power is a measure of the load matching.
The R&S Cable Rider ZPH displays it as the return loss or standing wave ratio.
The power sensors for the R&S Cable Rider ZPH have an asymmetrical design. There-
fore, they have to be inserted into the test setup in such a way that the "Forward" arrow
on the sensor points toward the load (in the direction of the power flux).
When measuring high powers, pay strict attention to the following instructions to avoid
personal injury and to prevent the power sensor from being destroyed.
Using Power Meter
