Power Meter
R&S
®
Cable Rider ZPH
140
User Manual 1321.0950.02 ─ 03
1. Select the "MT" softkey.
2. Select the measurement time most suitable for your test setup.
Taking additional loss or gain into account
At high powers that cause the power sensor maximum input level to be exceeded or at
very low levels that are below the R&S Cable Rider ZPH minimum sensitivity, the R&S
Cable Rider ZPH can take additional loss or gain between the DUT and the power sen-
sor into account. These differences are defined in terms of an offset in dB relative to
the measured level. A positive offset corresponds to a loss and a negative offset corre-
sponds to a gain.
The R&S Cable Rider ZPH shows the current offset in the diagram header.
1. Press the SCALE key.
2. Select the "Ref Offset" softkey.
The entry box for the reference offset opens.
3. Enter the offset you require.
The offset is taken into account in the power or level display.
8.2 Using a Directional Power Sensor
For power measurements in both directions (forward and reverse), you can connect
directional power sensors to the R&S Cable Rider ZPH. The R&S Cable Rider ZPH
supports the following directional power sensors:
●
R&S FSH-Z14
●
R&S FSH-Z44
With a directional power sensor, the R&S Cable Rider ZPH measures the power of a
signal from source to load (forward power) and from load to source (reverse power).
The ratio of forward and reverse power is a measure of the load matching. The R&S
Cable Rider ZPH displays the results as the return loss or the standing wave ratio.
1. Press the MODE key.
2. Select the "Power Meter" softkey
The R&S Cable Rider ZPH activates the mode for power measurements.
Using a Directional Power Sensor
