Nrp-Z Level Control - R&S SMB100A Operating Manual

®
R&S SMB100A
Remote command:
[:SOURce<hw>]:POWer:ALC:SONCe
5.3.5.5

NRP-Z Level Control

With the NRP-Z Level Control function, you can achieve a very stable and accurate RF
power supplied to your DUT. With the aid of a downstream control circuit, a CLPC
(Closed Loop Power Control), you can detect frequency response characteristics of the
used components, such as losses due to cables, modules or components like power
amplifiers, and compensate these effects accordingly.
Example: How to set up a closed loop power control
Figure 5-4: 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
returns the results 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
constant input level at the DUT in real time.
Operating Manual 1407.0806.32 ─ 21
on page 377
Instrument Function
RF Block
154