Configuring the RF Signal
R&S
®
SMW200A
593User Manual 1175.6632.02 ─ 30
For example, to obtain a sufficient low average value, set the aperture time exactly to
one modulation period.
Remote command:
:SENSe<ch>[:POWer]:APERture:TIMe on page 896
S-Parameter ← Sensor Settings
Activates the use of the S-Parameter correction data of the connected power sensor.
For sensors with attenuator, this function is automatically activated.
S-Parameter correction is used to mathematically shift the reference plane to the DUT
by considering the S-parameters for any components connected upstream of the sen-
sor.
The S-Parameter table can be changed with the S-Parameters tool, provided as part of
the free R&S NRP Toolkit software. For more information, refer to the manual of the
connected R&S NRP power sensor.
Remote command:
:SENSe<ch>[:POWer]:CORRection:SPDevice:STATe on page 897
:SENSe<ch>[:POWer]:CORRection:SPDevice:LIST? on page 897
:SENSe<ch>[:POWer]:CORRection:SPDevice:SELect on page 896
Enable Logging ← Sensor Settings
Activates recording of R&S NRP power sensor readings in a log file.
There is 1 log file per sensor. The log files are created automatically and filled in con-
tinuously. They are text files with predefined filename SensLog<n>.txt, where <n>
indicates the connected sensor. Log files are stored on the internal memory, in the
directory /var/user/SensorLogging.
Each log file contains the measured value (2 readings when you work with peak sen-
sors), the sensor type, and the measurement time (timestamp). Logged data is not
overwritten. When a new measurement is started, the collected logging data is appen-
ded in the log file.
Check the used disc space regularly and remove log files to maintain storage capacity.
Note: The logging function is intended for measurements with long time intervals. It is
suitable source for data reconstructions if the connection to the sensor was interrupted.
Remote command:
:SENSe<ch>[:POWer]:LOGGing:STATe on page 901
8.9.5 How to Calibrate the Power Level with an R&S NRP Power Sensor
Using a R&S NRP power sensor and the user correction function of the instrument,
you can compensate external frequency responses. The R&S SMW utilizes the read-
ings of the power sensor and creates a correction value table for controlling the output
level during operation.
To connect the R&S NRP to the R&S SMW
1. Connect the power sensor.
Improving Level Performance
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