Guzik Technical Enterprises

Sergey Konshin

Anatoli B Stein

Vladislav Anatolievich Klimov

Semen P Volfbeyn

Valeriy Serebryanskiy

A broadband digitizer for an applied broadband analog input signal SA(t). The digitizer includes a low frequency analog-to-digital converter (LF ADC) channel and a high frequency analog-to-digital converter (HF ADC) channel, an input splitter coupled to respective inputs to the LF ADC channel HF ADC channels, a frequency divider, and a combining unit. Low frequency portions of SA(t) are digitized to digital signal SD[n] in the LF ADC channel and high frequency portions of SA(t) are digitized to digital signal SD[n] in the HF ADC channel. The combining unit combines the digital signals SD[n] and SD[n] to form distortion-reduced SD[n], corresponding to SA(t). Front ends of the LF ADC channel and HF ADC channel reduce level-caused distortions, and the combining unit reduces ADC frequency-caused, time-position-caused, and interpolation-caused distortions.

Broadband digitizer with a low frequency bypass

Disclosed is a method of equalization of a vector/signal analyzer including: providing a structured test signal within a selected frequency range. The structured test signal includes a plurality of frequency components each having a respective amplitude and phase. The method includes inputting the test signal to the analyzer; the analyzer operating to condition the test signal; determining information representative of frequency distortion of the conditioned test signal introduced by the analyzer; generating a set of equalization coefficients based on the information representative of the frequency distortion, the set of coefficients corresponding to the selected frequency range; and storing the set of equalization coefficients and the correspondence of the set of coefficients to the selected frequency range.

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Mountain View, CA, United States of America

Sergey Konshin