Abstract: According to one embodiment, a testing device includes a signal generator that generates a first signal output to a device under test, a channel selector provided after the signal generator and configured to select one of a plurality of channels, a signal receiver that receives the second signal supplied from the device under test, a correction value calculator that calculates a correction value for calibrating loss of a respective one of the channels, wherein the correction value calculator calculates a correction value for calibrating loss of a respective one of the channels included in the channel selector, based on a signal level received by the signal receiver via a loopback channel, when a calibration-level output state indicating a state where a signal level of the first signal generated by the signal generator reaches a predetermined transmission reference level of calibration is assumed.

Abstract: To provide a phase noise optimization device and a phase noise optimization method which are capable of automatically measuring optimum phase noise according to an offset frequency. There is included a phase noise data generation unit 28 that generates at least two types of phase noise data corresponding to at least two low-pass filters (LPFs) 15a and 15b selected by a filter selection unit 16 in at least one measurement frequency range, set in advance, out of a plurality of measurement frequency ranges, a comparison unit 29 that compares at least two types of phase noise data, and a phase noise optimization unit 30 that generates optimized phase noise data based on a comparison result of the comparison unit 29.

Abstract: To provide a phase noise optimization device and a phase noise optimization method which are capable of automatically measuring optimum phase noise according to an offset frequency. There is included a phase noise data generation unit 28 that generates at least two types of phase noise data corresponding to at least two LPFs 15a and 15b selected by a filter selection unit 16 in at least one measurement frequency range, set in advance, out of a plurality of measurement frequency ranges, a comparison unit 29 that compares at least two types of phase noise data, and a phase noise optimization unit 30 that generates optimized phase noise data based on a comparison result of the comparison unit 29.

Abstract: According to one embodiment, a testing device includes a signal generator that generates a first signal output to a device under test, a channel selector provided after the signal generator and configured to select one of a plurality of channels, a signal receiver that receives the second signal supplied from the device under test, a correction value calculator that calculates a correction value for calibrating loss of a respective one of the channels, wherein the correction value calculator calculates a correction value for calibrating loss of a respective one of the channels included in the channel selector, based on a signal level received by the signal receiver via a loopback channel, when a calibration-level output state indicating a state where a signal level of the first signal generated by the signal generator reaches a predetermined transmission reference level of calibration is assumed.

Abstract: To provide a signal analysis apparatus and a signal analysis method which can expand a dynamic range. A spectrum analyzer 1 includes a frequency conversion unit 10 that includes an S-ATT 11 which adjusts the level of an analog input signal and converts the input signal into a predetermined intermediate frequency signal, a V-ATT 21 that adjusts the level of an output signal from the frequency conversion unit 10, an ADC 23 that converts an output signal from the V-ATT 21 into a digital signal, an f-response correction filter 24 that corrects the frequency response of an output signal from the ADC 23, and a noise floor level subtraction unit 25 that subtracts the noise level of the ADC 23 from a noise floor level indicating an overall noise level of the S-ATT 11 to the f-response correction filter 24 in a predetermined frequency band.

Abstract: To provide a signal analysis apparatus and a signal analysis method which can expand a dynamic range. A spectrum analyzer 1 includes a frequency conversion unit 10 that includes an S-ATT 11 which adjusts the level of an analog input signal and converts the input signal into a predetermined intermediate frequency signal, a V-ATT 21 that adjusts the level of an output signal from the frequency conversion unit 10, an ADC 23 that converts an output signal from the V-ATT 21 into a digital signal, an f-response correction filter 24 that corrects the frequency response of an output signal from the ADC 23, and a noise floor level subtraction unit 25 that subtracts the noise level of the ADC 23 from a noise floor level indicating an overall noise level of the S-ATT 11 to the f-response correction filter 24 in a predetermined frequency band.

Abstract: To provide a signal generating device and a signal generating method capable of correcting the frequency characteristics of the level of a broadband radio-frequency signal. A signal generating device 10 includes a waveform data storage unit 11 that stores waveform data of a baseband signal, a quadrature modulator 20 that generates a modulation signal from the baseband signal, a local oscillator 31 that generates a local oscillation signal, a multiplier 32 that multiplies the modulation signal and the local oscillation signal to generate a radio-frequency signal in a predetermined frequency band, a frequency characteristic correction value determining unit 50 that acquires the frequency characteristics of the signal level of the frequency band on the basis of the center frequency of the radio-frequency signal, and a DF 12 that corrects the frequency characteristics of the level of the baseband signal.

Abstract: There is provided a spectrum analyzer and a spectrum analysis method capable of promptly performing measurement while preventing the spectrum waveform caused by the fractional spurious components from being displayed. When the width of a designated span (analysis target frequency range) is larger than a boundary value, a reference signal frequency is set to a predetermined reference value, and a loop filter band narrower than a RBW (resolution bandwidth) is selected to thereby make the fractional spurious components be within the RBW and prevent it from being displayed as a spectrum waveform.

Abstract: To provide a signal generating device and a signal generating method capable of correcting the frequency characteristics of the level of a broadband radio-frequency signal. A signal generating device 10 includes a waveform data storage unit 11 that stores waveform data of a baseband signal, a quadrature modulator 20 that generates a modulation signal from the baseband signal, a local oscillator 31 that generates a local oscillation signal, a multiplier 32 that multiplies the modulation signal and the local oscillation signal to generate a radio-frequency signal in a predetermined frequency band, a frequency characteristic correction value determining unit 50 that acquires the frequency characteristics of the signal level of the frequency band on the basis of the center frequency of the radio-frequency signal, and a DF 12 that corrects the frequency characteristics of the level of the baseband signal.

Abstract: There is provided a spectrum analyzer and a spectrum analysis method capable of promptly performing measurement while preventing the spectrum waveform caused by the fractional spurious components from being displayed. When the width of a designated span (analysis target frequency range) is larger than a boundary value, a reference signal frequency is set to a predetermined reference value, and a loop filter band narrower than a RBW (resolution bandwidth) is selected to thereby make the fractional spurious components be within the RBW and prevent it from being displayed as a spectrum waveform.

Abstract: A structure for attaching a brake fluid pressure generator to a vehicle. The brake fluid pressure generator is attached to a dash panel provided at the rear side of a damper housing, which divides a compartment of a vehicle into a cabin and an engine room. An installation hole, through which the brake fluid pressure generator is inserted, is formed on the dash panel to one side of the engine. A mounter, which accommodates at least part of the brake fluid pressure generator, is used for detachably attaching the brake fluid pressure generator to the dash panel from the cabin side. Thereby, part of the brake fluid pressure generator is positioned at the rear side of the dash panel, and the outline of the brake fluid pressure generator is positioned so that it might overlap the damper housing when viewed from the fore side direction with respect to the vehicle.

Abstract: The present invention relates to an attaching structure of a brake fluid pressure generator on the vehicle. This brake fluid pressure generator is attached to a dash panel provided at near the rear side of a damper housing, by which a compartment of a vehicle is divided into a cabin and an engine room.