Abstract: Provided is a measurement apparatus that measures a signal under measurement, including a strobe timing generator that sequentially generates strobes arranged at substantially equal time intervals; a level comparing section that detects a signal level of the signal under measurement at a timing of each sequentially provided strobe; a capture memory that stores therein a data sequence of the signal levels sequentially detected by the level comparing section; a window function multiplying section that multiplies the data sequence by a window function; a frequency domain converting section that converts the data sequence multiplied by the window function into a spectrum in the frequency domain; and an instantaneous phase noise calculating section that calculates instantaneous phase noise on a time axis of the signal under measurement, based on the spectrum.

Abstract: There is provided a correcting apparatus for correcting a PDF obtained from a measurement result of measuring a characteristic of a measurement target at strobe timings including errors with respect to ideal timings at predetermined intervals, the correcting apparatus including: an interpolation section that is supplied with a CDF of the measurement result, interpolates a value between each strobe timing of the CDF, calculates a value of the CDF at each of the ideal timings, and calculates a corrected CDF at the ideal timings; and a corrected function generating section that generates a corrected PDF in which the errors of the strobe timings for the PDF have been corrected, based on the corrected CDF calculated by the interpolation section.

Abstract: There is provided a noise separating apparatus that separates a probability density function of a predetermined noise component from a probability density function of a signal under test. The noise separating apparatus includes a domain transforming section that is supplied with the probability density function of the signal under test and transforms the probability density function into a spectrum in a predetermined variable axis, and a standard deviation computing section that computes standard deviation of a random component of noise contained in the signal under test based on a magnitude of a predetermined variable component in a main lobe of the spectrum.

Abstract: A measurement apparatus that measures a signal under measurement, including a strobe timing generator that sequentially generates strobes arranged at substantially even time intervals, a level comparing section that detects a signal level of the signal under measurement at a timing of each sequentially provided strobe, a capture memory that stores therein a data sequence of the signal levels sequentially detected by the level comparing section, a frequency domain converting section that converts the data sequence into a spectrum in the frequency domain, and a jitter calculating section that calculates jitter of the signal under measurement based on a value obtained by integrating levels of frequency components in a predetermined frequency range of the spectrum.

Abstract: There is provided a probability density function separating apparatus that separates a predetermined component in a given probability density function, including: a domain transforming section that is supplied with the probability density function and transforms the probability density function into a spectrum in a frequency domain; and a standard deviation computing section that computes standard deviation of a random component included in the probability density function based on the spectrum.

Abstract: There is provided a probability density function separating apparatus that separates a predetermined component in a given probability density function. The probability density function separating apparatus includes a domain transforming section that is supplied with the probability density function and transforms the probability density function into a spectrum in a predetermined variable axis, and a deterministic component computing section that multiplies a multiplier coefficient according to a type of distribution of a deterministic component included in the given probability density function by a value, in the variable axis, of a first null of the spectrum and computes a peak to peak value of the probability density function with the deterministic component.

Abstract: There is provided a probability density function separating apparatus that separates a predetermined component from a given probability density function. The apparatus includes: a domain transforming section that is supplied with the probability density function and transforms the probability density function into a spectrum in a frequency domain; and a deterministic component computing section that multiplies a multiplier coefficient according to a type of distribution of a deterministic component included in the given probability density function by a first null frequency of the spectrum in the frequency domain and computes a peak to peak value of the probability density function with the deterministic component.

Abstract: A measuring apparatus measures a signal-under-test having a signal level that changes at predetermined bit time intervals. A strobe timing generator sequentially generates strobes at even time intervals. A level comparator detects a level of the signal at a timing at which each strobe is sequentially provided. A capture memory stores a signal level output from the comparator. A signal processor calculates a measurement of the signal based on a data series including data taken at even time intervals, each larger than a bit time interval of the signal.

Abstract: A filter includes at least a pin diode, an inductive element, and a varactor diode coupled as a resonant circuit. The filter injects data dependent jitter into a digital data signal with a given data rate for testing a transceiver.

Abstract: There is provided a correcting apparatus for correcting a PDF obtained from a measurement result of measuring a characteristic of a measurement target at strobe timings including errors with respect to ideal timings at predetermined intervals, the correcting apparatus including: an interpolation section that is supplied with a CDF of the measurement result, interpolates a value between each strobe timing of the CDF, calculates a value of the CDF at each of the ideal timings, and calculates a corrected CDF at the ideal timings; and a corrected function generating section that generates a corrected PDF in which the errors of the strobe timings for the PDF have been corrected, based on the corrected CDF calculated by the interpolation section.

Abstract: There is provided a probability density function separating apparatus that separates a predetermined component in a given probability density function. The probability density function separating apparatus includes a domain transforming section that is supplied with the probability density function and transforms the probability density function into a spectrum in a frequency domain, and a deterministic component computing section that multiplies a multiplier coefficient according to a type of distribution of a deterministic component included in the given probability density function by a first null frequency of the spectrum in the frequency domain and computes a peak to peak value of the probability density function with the deterministic component.

Abstract: Provided is a measurement apparatus that measures a signal under measurement, including a strobe timing generator that sequentially generates strobes arranged at substantially equal time intervals; a level comparing section that detects a signal level of the signal under measurement at a timing of each sequentially provided strobe; a capture memory that stores therein a data sequence of the signal levels sequentially detected by the level comparing section; a window function multiplying section that multiplies the data sequence by a window function; a frequency domain converting section that converts the data sequence multiplied by the window function into a spectrum in the frequency domain; and an instantaneous phase noise calculating section that calculates instantaneous phase noise on a time axis of the signal under measurement, based on the spectrum.

Abstract: There is provided a probability density function separating apparatus that separates a predetermined component in a given probability density function, including: a domain transforming section that is supplied with the probability density function and transforms the probability density function into a spectrum in a frequency domain; and a standard deviation computing section that computes standard deviation of a random component included in the probability density function based on the spectrum.

Abstract: A measurement apparatus that measures a signal under measurement, including a strobe timing generator that sequentially generates strobes arranged at substantially even time intervals, a level comparing section that detects a signal level of the signal under measurement at a timing of each sequentially provided strobe, a capture memory that stores therein a data sequence of the signal levels sequentially detected by the level comparing section, a frequency domain converting section that converts the data sequence into a spectrum in the frequency domain, and a jitter calculating section that calculates jitter of the signal under measurement based on a value obtained by integrating levels of frequency components in a predetermined frequency range of the spectrum.

Abstract: There is provided a noise separating apparatus that separates a probability density function of a predetermined noise component from a probability density function of a signal under test. The noise separating apparatus includes a domain transforming section that is supplied with the probability density function of the signal under test and transforms the probability density function into a spectrum in a predetermined variable axis, and a standard deviation computing section that computes standard deviation of a random component of noise contained in the signal under test based on a magnitude of a predetermined variable component in a main lobe of the spectrum.

Abstract: There is provided a probability density function separating apparatus that separates a predetermined component in a given probability density function. The probability density function separating apparatus includes a domain transforming section that is supplied with the probability density function and transforms the probability density function into a spectrum in a predetermined variable axis, and a deterministic component computing section that multiplies a multiplier coefficient according to a type of distribution of a deterministic component included in the given probability density function by a value, in the variable axis, of a first null of the spectrum and computes a peak to peak value of the probability density function with the deterministic component.

Abstract: There is provided a measuring apparatus for measuring a signal-under-test, having a comparator for sequentially comparing voltage values of the signal-under-test with a threshold voltage value fed thereto at timing of strobe signals sequentially fed thereto, a strobe timing generator for sequentially generating the strobe signals placed almost at equal time intervals, a capture memory for storing the comparison result of the comparator and a digital signal processing section for calculating jitter of the signal-under-test based on the comparison result stored in the capture memory.

Abstract: There is provided a probability density function separating apparatus that separates a predetermined component in a given probability density function. The probability density function separating apparatus includes a domain transforming section that is supplied with the probability density function and transforms the probability density function into a spectrum in a frequency domain, and a deterministic component computing section that multiplies a multiplier coefficient according to a type of distribution of a deterministic component included in the given probability density function by a first null frequency of the spectrum in the frequency domain and computes a peak to peak value of the probability density function with the deterministic component.

Abstract: There is provided a probability density function separating apparatus that separates a predetermined component from a given probability density function. The apparatus includes: a domain transforming section that is supplied with the probability density function and transforms the probability density function into a spectrum in a frequency domain; and a deterministic component computing section that multiplies a multiplier coefficient according to a type of distribution of a deterministic component included in the given probability density function by a first null frequency of the spectrum in the frequency domain and computes a peak to peak value of the probability density function with the deterministic component.

Abstract: There is provided a noise separating apparatus that separates a probability density function of a predetermined noise component from a probability density function of a signal under test. The noise separating apparatus includes a domain transforming section that is supplied with the probability density function of the signal under test and transforms the probability density function into a spectrum in a frequency domain, and a standard deviation computing section that computes standard deviation of a random component of noise contained in the signal under test based on a magnitude of a predetermined frequency component in a main lobe of the spectrum.