Registers – Transfer mechanism – Traveling pawl
Patent
1975-06-19
1977-07-05
Smith, Jerry
Registers
Transfer mechanism
Traveling pawl
324 05A, 324 05AC, G01N 2778, G01R 3308
Patent
active
040341917
ABSTRACT:
Broadband RF excitation for a Fourier transform spectrometer is obtained by synthesizing the time domain excitation from the desired frequency spectrum of RF excitation. Means are provided to Fourier transform the desired spectral data from the frequency domain into the time domain to obtain a modulation output for modulating an RF carrier signal to generate the desired sideband of RF excitation. In a preferred embodiment, the desired frequency domain data, as tabled in the computer, has a pseudorandom phase shift added to each component for scrambling the phases of the RF excitation. The excited RF resonance signals in the time domain are detected, time-averaged, Fourier transformed to the frequency domain and, in the case of phase scrambling, unscrambled by the pseudorandom phase angle sequence, and displayed.
REFERENCES:
patent: 3475680 (1969-10-01), Anderson et al.
patent: 3581191 (1971-05-01), Anderson
patent: 3609317 (1971-09-01), Siebert, Jr.
patent: 3674998 (1972-07-01), Benz
patent: 3681680 (1972-08-01), Ernst
patent: 3720816 (1973-03-01), Keller et al.
patent: 3786341 (1974-01-01), Anderson et al.
patent: 3795856 (1974-03-01), Keller
Hill Howard D. W.
Tomlinson Barrett L.
Cole Stanley Z.
Fisher Gerald M.
Smith Jerry
Varian Associates Inc.
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