A Signal Averager Interface between a Biomation 6500 Transient Recorder and a LSI-11 Microcomputer.

摘要

This report describes the design and implementation of a versatile and compact signal averager interface between a Biomation 6500 transient recorder and a LSI-11 microcomputer. The design allows for fast signal averaging in excess of 1 kHz and is also easily software configurable and controllable. The interface has been incorporated into an LSI-11 system using the RT-11 operating system and found to perform very satisfactorily. Basically, a signal averager adds together waveforms that are synchronized in time so that any coherent features that are present will add constructively; whereas, any incoherent features will add destructively. In this way the ratio of signal to noise, or coherent to incoherent features, can be increased from that which it is for any given waveform.