Power Meter
R&S
®
Spectrum Rider FPH
203
User Manual 1321.1011.02 ─ 06.00
Message
Cause
Remedy
Power sensor error
The power sensor signals an
error to the R&S Spectrum Rider
Contact a Rohde & Schwarz ser-
vice center.
Unknown power sensor model
connected
The R&S Spectrum Rider cannot
identify the device connected to
the power sensor interface.
7.1.2
Performing and Configuring Measurements
After you have connected a power sensor, the R&S Spectrum Rider immediately starts
to measure the signal power.
Defining the center frequency
Power sensors have a memory containing correction values that are dependent on the
frequency. Hence, measurement results are the most accurate for signals whose fre-
quency you know.
Note that the R&S Spectrum Rider maintains the center frequency that you have set in
another operating mode. In that case, it uses that frequency as the power sensor fre-
quency.
If you want to perform measurements on another known signal, you can change the
power sensor frequency manually.
1. Select the "Freq" softkey.
The R&S Spectrum Rider opens an input field to define the frequency opens.
2. Enter the frequency of the signal.
The R&S Spectrum Rider transfers the new frequency to the power sensor which
then corrects the measured power readings.
Zeroing the power sensor
Offset voltages and currents have most effect on the power readout when measuring
low powers. You can compensate for these offsets by zeroing the power sensor.
Do not apply power during the zeroing process, as the power sensor cannot distinguish
between external powers and internal offsets.
1. Select the "Zero" softkey.
2. The R&S Spectrum Rider asks you not to apply any signals to the power sensor
during the zeroing process.
Using a Power Sensor
