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The HP 8903B Audio Analyzer provides unparalleled versatility and performance for audio measurements from 20 Hz to 100 kHz. The HP 8903B combines the functionality of a low-distortion audio source, high-performance distortion analyzer, frequency counter, ac voltmeter, dc voltmeter and SINAD meter into one compact package. With microprocessor control of source and analyzer, the HP 8903B can perform stimulus-response measurements, such as signal-to-noise ratio and swept distortion, automatically with no additional equipment. The HP 8903B has many features which make difficult audio measurements easy. These include flexible data display formats, a selectable balanced or unbalanced input, plug-in filters, and automatic notch filter tuning. With the ratio key, you can establish a reference in % or dB and directly make frequency response and 3 dB bandwidth measurements without computation. A fully balanced analyzer input allows testing of bridged power amplifiers found in many radios and car stereos as well as professional balanced audio equipment. Distortion Residual distortion and noise (the higher of); @ 80 kHz BW: -80 dB (0.01%) or 17 uV, 20 Hz to 20 kHz. @ 500 kHz BW: -70 dB (0.032%) or 50 uV, 20 Hz to 50 kHz. 65 dB (0.056%) or 50 uV, 50 kHz to 100 kHz. Signal-to-Noise Frequency range: 50 Hz to 100 kHz. Display range: 0 to 99.99 dB. Accuracy: ± 1 dB. Source Frequency Range: 20 Hz to 100 kHz.. Resolution: 0.3%. Accuracy: 0.3% of setting. Source Output Level Range: 0.6 mV to 6V open circuit. Resolution: 0.3% or better. Options. Opt 001: Input/ output connectors on rear panel only. Opt 010 or 050: 400 Hz High-Pass filter. Opt 011 or 051: CCITT Weighting filter. Opt 012 or 052: CCIR Weighting filter. Opt 013 or 053: C-Message Weighting filter. Opt 014 or 054: CCIR/ ARM Weighting filter. Opt 015 or 055: "A" Weighting filter.
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