Detector module for a simplified ultrasonic time delay spectrometry system

When setting up a water-tank based ultrasonic system, aligning the transmitting and receiving transducers to maximize the received signal is required. With a digital time delay spectrometry (TDS) system the "dechirped" signal is observed while positional adjustments are being made. Observation is easier if only the envelope, rather than the modulated signal, is displayed. A module is described that provides an envelope (rectified signal) that, when displayed on an oscilloscope, is suitable as an alignment aid for use with the TDS system described elsewhere in these Proceedings.