SDAA139 October 2025 UCC33020 , UCC33020-Q1 , UCC33410 , UCC33410-Q1 , UCC33411-Q1 , UCC33420 , UCC33420-Q1 , UCC33421-Q1
2.1 Setup
The following guidelines are recommended for the setup.
- For CE, an external, 5V power supply is used to provide power to the device under test (DUT) through the line impedance stabilization networks (LISNs). As required by the CISPR 32 test standard, the LISNs are placed and connected to a metal conductive floor and must be at least 80cm away from the DUT. The DUT must then be placed on a non-conductive table at least 10cm away from the external power supply.
- For RE, a low noise power supply is used to power the DUT. It is very important that the connection from the power supply to the DUT is short and tightly coupled. As seen in Figure 2-3, a twisted pair is used to connect both.
Figure 2-1 CISPR 32 CE Setup
Figure 2-2 CISPR 32 RE Setup
Figure 2-3 DUT for RE