G - Physics – 06 – G
Patent
G - Physics
06
G
354/137
G06G 7/12 (2006.01) G06F 1/035 (2006.01) H03K 5/156 (2006.01) H04B 3/46 (2006.01)
Patent
CA 1042107
COMPLEX ANALOG WAVEFORM GENERATOR Abstract of the Disclosure A signal generator digitally synthesizes a complex analog signal which has a frequency domain repre- sentative including a precise low-frequency offset for each spectral component. The complex analog signal is particularly adapted to increase the accuracy and reliability of a conventional ratio measurement technique. This ratio measurement technique provides a single number rating which is the comprehensive measure of the fidelity of a transmission channel. The complex analog signal is thoroughly compensated for a number of effects. The transfer response of filters and fundamental sources of spectral distortion inherent to digital synthesis, such as aperture effect and quantizing distortion, are items for which compensation is provided. The signal generator has complementary circuitry which conveniently assists to provide desirable odd half-wave symmetry in the analog signal and reduces by one-half the number of stored code words from which the signal is derived. - i -
244518
Na
Western Electric Company Incorporated
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