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The Tektronix AA501 Distortion Analyzer Plug-In provides measurement of level, total harmonic distortion plus noise (THD+N). The fundamental frequency range is 10Hz to 100kHz, with harmonics measured out to 300kHz. The distortion ranges are auto (100%), 20%, 2%, 0.2%, and dB (autoranging). The unit allows readings to be expressed in true rms or average response and rms calibrated. Any one of four built-in frequency-weighting filters may be switched into the signal paths for preconditioning of the signal to be measured. Provision is also made to permit the use of a user-selected filter as well. The digital voltmeter has input range of 200 µV to 200 V (10 steps) plus auto range and will display signal level in volts, dBm, or dB ratio. Other features include input monitor, function output, and auxiliary input connectors. It utilizes 2 slots in a Tek TM-Series Power Module.
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