Improving level performance
R&S
®
SMA100B
244User Manual 1178.3834.02 ─ 09
See also "About the measuring principle, averaging filter, filter length, and achieving
stable results" on page 237.
Remote command:
:SENSe<ch>[:POWer]:FILTer:SONCe on page 556
Timeout ← Sensor settings
For "Filter > Fixed Noise", sets a time limit for the averaging process.
Remote command:
:SENSe<ch>[:POWer]:FILTer:NSRatio:MTIMe on page 556
Default Aperture Time ← Sensor settings
The sensor default setting is sufficient. Disable this parameter to specify a user-defined
aperture time per sensor, if, for example, the readings vary.
To obtain stable readings, set the Aperture Time exactly to one modulation period.
Remote command:
:SENSe<ch>[:POWer]:APERture:DEFault:STATe on page 553
Aperture Time ← Sensor settings
If "Use Default Aperture Time > Off", defines the acquisition time per sensor.
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 553
S-Parameter ← Sensor settings
Lists the S-Parameter correction data files retrieved for the connected power sensor.
To activate the correction data, select the corresponding file.
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 554
:SENSe<ch>[:POWer]:CORRection:SPDevice:LIST? on page 554
:SENSe<ch>[:POWer]:CORRection:SPDevice:SELect on page 553
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.
Using power sensors
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