A Digital System for the Acquisition and Processing of Geoacoustic Data

Summary In the autumn of 1969 we accepted delivery of three TC-200 digital data acquisition systems from Teledyne Geotech. These systems can record up to 16 channels of long period, digital data with a specified sampling rate (currently 1 per second) on magnetic tape in an 'IBM compatible' format. Identifying headers are automatically written at the beginning of each file on tape and Universal Time is written each minute. The actual dynamic range of the receding system is about 66 dB, but an operating range of 120 dB is automatically assured by the use of binary, gain-ranging amplifiers. The systems have been tested and are now operating satisfactorily at Blacknest Laboratory near Reading in England, at the University of Alaska and at a field site east of Dallas, Texas.