Dear Dr. Stefan Ritt,

My name is Mingxin Liu. Our research group has completed a series of experimental measurements based on the available AC-coupled DRS4 evaluation board. Nevertheless, the AC-coupled input topology cannot fulfill our experimental requirements. As shown in the attached file, the existing hardware design fails to fully capture input signals featuring negative DC offset components. For this reason, we are writing to inquire about your officially recommended hardware design specifications or reference documents for DC-coupled DRS4 evaluation boards.

I look forward to any valuable suggestions and replies. Thanks in advance for your kind help.

Best regards,

Mingxin Liu