R&S FSH
Working with Power Sensors
Using a Power Sensor
Operating Manual 1309.6275.12 - 14
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If the R&S FSH recognizes a power sensor, it sets up a connection via the interface
and after a few seconds shows the measured power. It displays the type of the power
sensor in the display header.
If no power sensor has been connected or it is not connected appropriately, the
R&S FSH shows nothing.
If there are communication problems between the R&S FSH and the power sensor, the
R&S FSH displays one of the following error messages that indicate the possible
cause.
Message
Cause
Remedy
Error in zeroing: signal at sensor
A signal was present at the power
sensor when zeroing was
performed.
Unscrew the power sensor from
the device under test and repeat
zeroing.
Warning: Input overloaded
The power at the input of the
power sensor exceeds the
permitted power (23 dBm =
200 mW).
Reduce the power at the sensor
input.
Power sensor hardware error
Communication error between the
R&S FSH and the power sensor.
Unscrew the sensor from the
R&S FSH and check the
connectors.
If the problem persists, contact a
Rohde & Schwarz service center.
Power sensor error
The power sensor signals an
error to the R&S FSH.
Contact a Rohde & Schwarz
service center.
Unknown power sensor model
connected
TheR&S FSH cannot identify the
device connected to the power
sensor interface.
3.1.2 Performing and Configuring Measurements
After you have connected a power sensor, the R&S FSH 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
frequency you know.
Note that the R&S FSH maintains the center frequency that you have set in another
operating mode. In that case it uses that frequency as the power sensor frequency.
If you want to perform measurements on another known signal, you can change the
power sensor frequency manually.
M
Press the MEAS key
M
Press the "Freq" softkey.
An input field to define the frequency opens.
