Extended Data Fig. 6: Time-synchronization verification experiment for the sensors.

a, Testing set up involves a signal generator sending rectangular pulses to a chest unit, while received data is streamed over to the base station. The signal generator sends a delayed signal to switch the Red LED and the photodetector in the limb unit to capture the output associated with LED switching, followed by streaming the output to the same base station. b, A representative plot showing two signals obtained from the chest and limb unit with a delay between two units defined by the signal generator. c, Mean and standard deviation of calculated timing difference compared to defined delay (testing PAT).