The transmission short section (WTC36) serves as a data communication bridge between the surface data acquisition system and downhole logging instruments. It mainly consists of the cable bus and instrument bus interface, the main control section, and the step-down DC-DC power supply section. The transmission short section collects instrument data via the instrument bus, packages it, and transmits it to the surface acquisition box through the cable bus interface. At the same time, the surface acquisition box can send data to the remote transmission, thereby configuring or controlling the transmission short section and the logging instruments, achieving full-duplex communication between the surface acquisition system and the transmission short section.