Boots – shoes – and leggings
Patent
1987-04-03
1989-01-31
Chin, Gary
Boots, shoes, and leggings
315367, 324 77B, 364483, 364572, G06F 1531, G01R 2316
Patent
active
048020982
ABSTRACT:
A digital bandpass oscilloscope permits an operator to observe both time and frequency domain plots of analog signal components of frequency within a passband of selected center frequency during a time window of selected duration. The input signal is digitized, and the resulting digital data sequence is bandpass filtered and decimated by an adjustable decimation ratio to produce stored waveform data indicating the time dependent behavior of the passband during the time window. The oscilloscope, which utilizes the waveform data to produce both time and frequency domain displays of the passband, adjusts the decimation ratio to ensure that the number of data elements in the waveform data sequence is constant regardless of the selected duration of the time window and adjusts the bandwidth of the passband to minimize aliasing in the time domain display.
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Balakrishnan Shiv K.
Hansen Victor L.
Chin Gary
Dellett John P.
Gray Francis I.
Tektronix Inc.
Teska Kevin J.
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