title: An eight channel telemetry system for the transmission of biomedical signals.
abstract: An eight channel telemetry system is presented which has low dimensions, low weight and is easy to use. The transmission is in the 430 MHz band on the basis of pulse-width modulation in a time-multiplex mode. A standard 9 volt battery offers a minimum of 15 hours operation with an accuracy of 1%. The upper limit frequency is currently at about 100 Hz. A 9th channel serves to monitor the function of the system.
mesh_terms: D004562:Electrocardiography; D005260:Female; D005323:Fetal Monitoring / Q000295:instrumentation*; D006801:Humans; D011247:Pregnancy; D013686:Telemetry / Q000295:instrumentation*