Spot Sine Wave Generator 2

June 19E8Fe SPOT SINE WAVE GENERATOR 2 by M G Weigl The article is concluded with details on the burst adaptor, and the construction of the instrument. A tone burst is essentially com- posed of a controlled number of periods of an alternating voltage, usually a sine wave, and is used for testing and analysing the dynamic response of AF amplifiers, passive and active filters, and loudspeakers. In the case of the loudspeaker, for in- stance, a sine wave burst can be used to study the transient behaviour of a drive unit by measuring its acoustic output with the aid of a test micro- phone, fitted at a suitable distance in front of the cone. The signal from the micro- phone is then amplified and made visible on an oscillo- scope. This method provides useful information about the oc- currence of resonance effects, phase delay, ringing, etc., while it is also a practicable way of measuring the linear operating range of the drive unit under test. Since the burst is a rela- tively short si...