Improving Level Performance
R&S
®
SMA100B
239User Manual 1178.3834.02 ─ 05
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.
The "Pulse Data..." button is displayed only for measurement mode time and if an R&S
NRP-Z81 power sensor is connected.
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.
●
Switch off the RF power source for zeroing, but do not disconnect it from the power
sensor. This proceeding keeps the thermal equilibrium, and the zeroing process
also compensates the noise that superimposes the measured signal (e.g. from a
broadband amplifier).
Pulse Data
Opens the dialog for configuring the settings for pulse data analysis.
See "Configure Trace Pulse Data" on page 242.
Trigger..
Opens the dialog for configuring the trigger settings.
See "Configure Trigger" on page 248
Level Offset State- Power Analysis
Activates a level offset at the sensor input. Set the appropriate value in the entry field
on the right.
Using Power Sensors
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