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Tektronix AA501
audio analyzer
Tektronix AA501

Produced from 1980 to (?)

Manuals – Specifications – Links – Pictures

The Tektronix AA501 is an audio analyzer plug-in for the TM500 system.

It provides automated measurement of THD+N and levels (RMS responding) in the range of 10 Hz to 100 kHz. Harmonics are measured up to 300 kHz. It has four built-in weighting filters and allows the user to loop an external filter in. Option 01 adds intermodulation measurement. Input impedance is 100 kΩ unlike other analyzers with usually 1 MΩ or near-infinite input impedance. Internal THD in the audio band is specified as typically <−95 dB (0.0018 %). Residual THD+N is specified as <−90 dB (<0.0032 %).

It was one of the first, if not the first, audio analyzers capable of fully automatic measurements without requiring manual reference level setting, range selection or frequency fine-tuning. It is ideally combined with the SG505 low distortion oscillator.

The AA501 is two slots wide.

Key Specifications

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Documents Referencing AA501

Document Class Title Authors Year Links
Tekscope 1980 V12 N2.pdf Article New Products 1980
Tekscope 1980 V12 N3.pdf Article Automatic Distortion Analyzer Speeds Distortion Measurements Bruce Hofer 1980