Apparatus for measurement by digital spectrum analyzer

Details Apparatus for measurement by digital spectrum analyzer Apparatus for measurement by digital spectrum analyzer

1984-09-25

1986-08-19

Tokar, Michael J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Analysis of complex waves

364576, 324 57PS, G01R 2316

Patent

active

046072160

ABSTRACT:
A frequency range of measurement is divided into a plurality of regions. For each region a test signal suitable for measurement of the region is generated independently, and the test signal is supplied to a device under test. The output of the device under test is converted by an AD converter into a digital signal, which is then subjected to fast Fourier transform. For each region the sensitivity of the AD converter is set for optimal conversion of the signal level at its input side by the converter, and then the fast Fourier transform is carried out. On the basis of the sensitivity set for one of the regions, the magnitude of the fast Fourier transform output in each of the other regions is corrected according to the sensitivities set for the other regions.

REFERENCES:
patent: 4149122 (1979-04-01), Parato
patent: 4517512 (1985-05-01), Petrich et al.
patent: 4539518 (1985-09-01), Kitayoshi

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