The author is senior development engineer for Wheatstone Corp. There’s nothing like a little audio performance testing to cap off a hectic week at the station, especially if you don’t have to haul out ...

Testing FM receivers is not that much different than testing other pieces of audio equipment. Appropriate tests include the big six: level, frequency response, THD+N, phase, interchannel crosstalk, ...

That's the test-equipment hardware challenge. Equally or more important is knowing how to make the measurements. The plusses and minuses of simply measuring audio amplitude take up a page and a half ...

A small audio test generator is very useful for quickly tracing a signal through an audio unit. Its main purpose is speed rather than refinement. A single sine-wave signal of about 1 kHz is normally ...