
To resolve interference between wireless and wired communication in a DTU, frequency domain isolation and timing staggering are necessary. The wireless frequency band should be far removed from the wired signal band; if wired communication operates at low frequencies, the wireless frequency should be above 800MHz. In the power supply section, the wireless and wired modules should be powered independently, using ferrite beads for isolation. Layout-wise, they should be arranged in separate zones with a shielding plate in between. Timing-wise, time-division multiplexing should be used to avoid simultaneous transmission and reception. Interference should be monitored through spectrum analysis to optimize isolation measures. After resolving interference, the bit error rate when both modules operate simultaneously should be below 10^-6.