Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Analysis of complex waves
Patent
1989-07-19
1991-06-18
Tokar, Michael J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Analysis of complex waves
328163, 328167, G01R 2316
Patent
active
050252070
ABSTRACT:
The disclosure concerns automatic measuring stands. The automatic measurement of the amplitude of an intermodulation line at the output of a TV transmitter is difficult to achieve because this line is often drowned in a cloud of noise formed by the spectra of lines due to the numerous frequencies of the line frequency. The standard way to make the measurement is to do a visual interpretation. When the measurement is done automatically, this visual interpretation is not possible. The method according to the invention uses the a priori knowledge of the existence of a steady level at the peak of the line to be measured. The method consists in: considering the samples of the spectrum signal given by the analyzer, for a period of time corresponding to the duration of the steady level; considering a sequence of sections in the scale of the amplitudes; counting the number of samples having a value belonging to a given section, successively for each of the sections; determining that section which corresponds to the greatest number of samples, the value corresponding to this section constituting the amplitude value of the steady level.
REFERENCES:
patent: 4019148 (1977-04-01), Shawhan
patent: 4577335 (1986-03-01), Wong et al.
patent: 4672635 (1987-06-01), Fischer
8140 Wireless World, vol. 87, May 1981, No. 1544, Sheepen Place, Colchester, Gr. Britain, J. L. Gordon, Data Store by Running Average.
Thomson-LGT Laboratoire General des Telecommunications
Tokar Michael J.
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