Hewlett Packard - 8903A - Analyzer
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Equipment:
8903A
Date:
1981
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Information
The HP Model 8903A Audio Analyzer is a complete audio
measurement system covering the frequency range of 20 Hz to
100 kHz. It combines a low-distortion signal source with a
signal analyzer. The analyzer can perform distortion
analysis, frequency count, and ac level, dc level, SINAD,
and signal-to-noise measurements. The Audio Analyzer reduces
the number of instruments required in many applications
involving audio signal characterization.
The Audio Analyzer is easy to use. All measurements are
selected by one or two keystrokes. For distortion
measurements, the Audio Analyzer automatically tunes to and
levels the input signal. Measurement and output ranges are
automatically
selected for maximum resolution and accuracy. Furthermore,
tuning is independent of the source. Thus, the source can be
set to one frequency while the analyzer is measuring the
distortion on a signal at another frequency (i.e., there is
no need to tune the analyzer to the source).
The combined capabilities of the instrument are enhanced by
microprocessor control, resulting in more capability than
would be available from separate instruments. For example,
when making signal-to-noise measurements, the Audio Analyzer
monitors the ac input level while turning the source on and
off. The microprocessor then computes and displays the ratio
of the on and off levels. The ratio can be displayed in
either % or dB. In addition, the source can be swept. This
makes measurements such as frequency response or complete
distortion characterization simple to perform.
Microprocessor control allows flexible entry of source
parameters and versatile display formats. For example, ac
level can be displayed in V, mV, dBV, watts, or as a ratio
(in % or dB) referenced to an entered or measured value.
Virtually all functions are remotely programmable through
the Hewlett-Packard Interface Bus (HP-IB1). Programming is
easy and straightforward, and all measurements are made
through a single input connector. This eliminates the need
to switch between multiple inputs under remote control and
reduces software development time and hardware costs.
The Audio Analyzer measures the true rms level on all
measurements. True rms measurements assure greater accuracy
when measuring complex waveforms and noise. Accurate
distortion measurements typically can be made to less than
0.003% (-90 dB) between 20 Hz and 20 kHz at a IV level.
1 Manual
Service and user manual
Manual type:
Service and user manual
Pages:
450
Size:
20.6 MB
Language:
english
Revision:
Manual-ID:
08903-9002
Date:
Quality:
Scanned document, all readable.
Upload date:
May 31, 2015
MD5:
971ed64e-d3af-ec25-8f80-3a48fc11b30c
Downloads:
1421