Improving level performance
R&S
®
SMA100B
260User Manual 1178.3834.02 ─ 09
The "Configure Sensors" dialog provides specific parameters for the power sensor.
This part of the dialog can differ from the following description depending on the sensor
used. Refer to the manual of the power sensor in this case.
Power Sensor - Power Analysis
Selects the power sensor to be set if more than one sensor is connected to the instru-
ment.
Remote command:
n.a.
In remote control, the sensor is selected via the numeric suffix in the sense key word of
the command, for example SENSe2:POWer:SWEep:….
Zero - Power Analysis
Activates the auto zero function.
Zeroing calibrates the external power sensor by adjusting its reading at zero signal
power. For this purpose, the RF power source must be switched off or disconnected
from the sensor. If a Rohde & Schwarz power sensor receives an input power during
the zeroing process, it aborts zeroing and generates an error message. Zeroing takes
a few seconds, depending on the sensor model. Refer to the documentation of your
power sensor for more information.
Tips for zeroing
When to perform zeroing:
●
During warm up after switching on or connecting the instrument
●
After a substantial change of the ambient temperature
●
After fastening the power sensor module to an RF connector at high temperature
●
After several hours of operation
●
When low-power signals are to be measured, e.g. less than 10 dB above the lower
measurement limit.
Using power sensors
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