Power Meter
R&S
®
Cable Rider ZPH
144
User Manual 1321.0950.02 ─ 03
1. Press the "SCALE" key.
2. Select the "Ref Offset" softkey.
The R&S Cable Rider ZPH opens an input field to define the reference offset.
3. Enter the offset you require.
The selected offset displayed as "OFS" in the parameter view is taken into account
in the power (level) and matching results.
If high powers are applied that exceed the maximum input level of the R&S FSH-
Z14 or R&S FSH-Z44, a directional coupler or an attenuator has to be connected
ahead of the power sensor.
In such cases, the coupling attenuation of the directional coupler or the attenuation
value of the attenuator are entered as positive dB values (see
) into the R&S Cable Rider ZPH to ensure true measured power read-
out. In both cases, a termination or an attenuator of sufficient power-handling
capacity has to be connected to the power sensor at the load end. The matching
readout is irrelevant in such case since it is likewise corrected by taking into
account the attenuation value of the termination or attenuator.
Using a Directional Power Sensor
