In the ongoing evolution of optical module technology, PCB circuit boards face immense pressures across multiple dimensions—signalling, spatial constraints, thermal management—which continuously challenge their performance in material selection, process precision, and design. In the ongoing evolution of optical module technology, PCB circuit boards face immense pressures across multiple dimensions—signalling, spatial constraints, thermal management—which continuously challenge their performance in material selection, process precision, and design. Optical designers are constantly pushing the boundaries of technology, developing new materials, techniques, and software tools to improve the design and optimization of optical systems – crucial for continued growth and innovation in areas such as virtual reality, autonomous vehicles, and quantum. The Printed Circuit Board (PCB) at the heart of these modules is no longer a simple substrate but a highly engineered system. Specifically. These requirements have driven the development of Linear Drive Pluggable Optics (LPO) technology, which is expected to play an important role in the evolution of optical networks. This article describes the challenges associated with LPO design and testing and shows how EXFO's BA-4000-L2-RCNC can. Traditional architectures that rely on pluggable optical modules are hitting physical limits in signal attenuation, power, and port density.