Telecommunications – Transmitter and receiver at separate stations – Having measuring – testing – or monitoring of system or part
Patent
1995-04-07
1997-07-15
Urban, Edward F.
Telecommunications
Transmitter and receiver at separate stations
Having measuring, testing, or monitoring of system or part
379 1, 379 6, 324615, H04B 1700
Patent
active
056493045
ABSTRACT:
A method and apparatus for fast response and distortion measurement of a signal transfer device. A computer processor generates a multitone test signal of predetermined duration and stores it in a memory. The test signal is read out, converted to analog form, if necessary, and applied to the input of a device under test. The output produced by the device under test in response to the test signal is acquired and digitized, if necessary, and a Fast Fourier Transform is performed on the acquired data to determine its spectral characteristics. Frequency response, harmonic distortion, intermodulation distortion, phase distortion, wow and flutter and other signal transfer characteristics are measured by the CPU by analysis of the output signal. The multitone test signals a unique combination which is extracted at the output for identifying the source, or location, of the test signals.
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Audio Precision, Inc.
Urban Edward F.
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