HEATKEYS

Tektronix has over 60 years of experience designing test and measurement instrumentation. Learn about our industry-leading test and measurement equipment.

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B&K Precision offers a wide range instruments including Power Supplies, Function Generators, Multimeters, DMM, Oscilloscopes, and more.

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RadioShack

Tests your audio equipment, speakers, room acoustics and hearing. Audio signals and test tones playable online. High resolution sound test files available for free download.

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A High-Quality Web-based Audio Frequency Signal Generator. 96kHz Sample Rate. Generate sine waves, sweep tones, noises and other sound test waveforms, online!