Instrument Function
R&S
®
SMBV100A
170Operating Manual 1407.6062.32 ─ 08
Example: How to set up a closed loop power control
Fig. 5-1: Example of a test setup with NRP-Z Level Control
As shown in the example, the sensor measures a proportional power in defined time
intervals, derivated from a coupler. It considers optionally given S-parameters and sends
the results back to the generator. The signal generator compares the measured level with
the set value and adjusts its output level accordingly.
This allows you to control the external signal level continuously and reliably reach a con-
stant input level at the DUT in real time.
Please keep in mind that modulated signals may differ from CW signals regarding mean
power and peak power. This affects the operation of "NRP-Z Level Control".
Beyond that, it is strongly recommended that you disable the "List" mode, since it also
falsifies the power control loop.
5.4.7.1 NRP-Z Level Control Settings
To open the "NRP-Z Level Control" dialog, select "RF > Configure > NRP-Z Level Con-
trol" or use the MENU key under "RF".
Sensor
Selects the R&S NRP-Z power sensor for power control.
RF Signal and Analog Modulations - RF Block
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