7-CHANNEL DIGITAL TELEMETRY SYSTEM FOR MONITORING AND DIRECT COMPUTERCAPTURING OF BIOLOGICAL DATA

A seven-channel telemetry system for collection and display of biologi cal data is presented. The system can amplify bioelectrical signals in the range of 2 muV to 200 mV and has a bandwidth of 0.1-80 Hz, After multiplexing, the signals are digitized with a resolution of 8 bits. T he data are frequency modulated directly on a VHF transmitter. After r eceiving the data on a VHF receiver, they are routed directly to the R S232 input connector on the PC. Thereby the advantage of direct commun ication between the transmitter and the PC can be utilized. Expensive analog equipment is avoided and display of the signals on the PC scree n as well as signal analysis can be performed. The system has been tes ted and was found to be stable and highly reliable.