SWRU546E October 2018 – May 2022 AWR6843 , AWR6843AOP , IWR6443 , IWR6843 , IWR6843AOP
The immersion silver finish of the PCB provides a better high-frequency performance, but is also prone to oxidation in open environments. This oxidation causes the surface around the antenna region to blacken.
To avoid oxidation, the PCB should be stored in an ESD cover and kept at a controlled room temperature with low humidity conditions. All ESD precautions must be taken while using and handling the EVM.