Abstract: In a signal generating device 2, first signal generation means 12 for generating a most significant bit signal stream MSB, second signal generation means 13 for generating a least significant bit signal stream LSB, a mask generation means 14 for defining a bit that allows error insertion and a bit that prohibits error insertion with different pieces of bit information, and generating a mask pattern of each of the most significant bit signal stream MSB and the least significant bit signal stream LSB, based on symbol transition information indicating a transition destination of four PAM4 symbols of a PAM4 signal; and error insertion means 15 for inserting an error, based on bit information of the mask pattern corresponding to each bit of the most significant bit signal stream and the least significant bit signal stream designated according to a symbol error rate.

Abstract: Provided is an end face inspection device capable of inspecting different end face shapes without replacing an adapter for attachment. An end face inspection device includes: an optical system that forms an image of an end face of a test object, which is fixed at a predetermined position, at a position of an image sensor; and a focus detection section that acquires image data, which is output by the image sensor, and determines whether or not the end face is brought into focus in the image data. The focus detection section acquires a plurality of the image data pieces, in which parts of the end face are brought into focus by changing a focal position of the optical system by a predetermined distance at a time, and acquires focused image data by synthesizing the respective parts brought into focus in the plurality of image data pieces.

Abstract: A mobile terminal testing apparatus capable of facilitating a setting of a combination of frequency bands of carrier aggregation and a setting of frequency information of each band and easily performing a test of the carrier aggregation is provided. A mobile terminal testing apparatus includes a control unit (14) that acquires UE capability information of a mobile communication terminal (2), displays a list of combinations of frequency bands set in a carrier aggregation band combination list of the UE capability information, and sets frequency information of each cell of carrier aggregation according to a frequency band in a combination selected from the list.

Abstract: An electromagnetic wave shield box 50 accommodates a DUT 100 having an antenna 110 and a coupling antenna 80 that is spatially coupled to the antenna 110, and includes a coupling antenna holding module 70 that arranges a plurality of the coupling antennas 80 annually so that an antenna surface is directed to a center of a ring, and holds the coupling antennas 80. The coupling antenna holding module 70 holds each coupling antenna 80 in a posture in which the coupling antenna 80 is inclined at, for example, 32 degrees with respect to a horizontal surface so that the respective coupling antennas 80 are able to radiate radio waves toward the same radiation point in upper positions, and is rotated by about 5 degrees around a center axis C1 in a direction orthogonal to a circumferential direction of the ring of the coupling antenna 80.

Abstract: A distance between a center of a first probe antenna and a center of a second probe antenna in a measurement plane is longer than a distance between the center of the first probe antenna and a center of a third probe antenna in the measurement plane by a distance between two measurement positions adjacent to each other in a horizontal direction. A distance between a center of a fourth probe antenna and a center of a fifth probe antenna in the measurement plane is longer than a distance between the center of the fourth probe antenna and a center of a sixth probe antenna in the measurement plane by a distance between two measurement positions adjacent to each other in a vertical direction.

Abstract: A measurement device 10 includes a reception unit 13b that receives a frame transmitted from a DUT 1, an MCS determination unit 17a that determines whether or not a received MCS index of a frame received by the reception unit 13b matches a predetermined MCS index for comparison, a transmission unit 13a that transmits a notification signal to the DUT when the MCS determination unit 17a determines that the received MCS index matches the MCS index for comparison, and does not transmit the notification signal to the DUT when the MCS determination unit 17a determines that the received MCS index does not match the MCS index for comparison, and a measurement unit 14 that measures data under measurement included in the frame in which it is determined that the received MCS index matches the MCS index for comparison.

Abstract: A distance H from a standard point O to one surface of a bottom plate of a terminal holding section 31 is set so that with respect to a direct wave that is output from one of a measurement antenna 25 and a wireless terminal that is a measurement target and is directly input to the other one thereof, a reflectivity of a reflection wave that is output from the one thereof, is reflected on one surface 32a of the bottom plate of the terminal holding section 31, and is input to the other one thereof is equal to or smaller than an incidence angle (for example, 80° or 70°) for assigning a predetermined allowable limit in view of a characteristic of incidence angle-to-reflectivity determined by a specific dielectric constant of the terminal holding section 31, to thereby reduce an influence of the reflection wave on measurement.

Abstract: The present application relates to a technique for reducing the circuit scale of a testing device having a function of performing a fading process with respect to a propagation channel of S×U channels assumed between transmitting and receiving antennas, using a terminal compatible with MIMO for transmitting a downlink signal from a base station to a mobile terminal with the number of base station-side antennas S and the number of terminal-side antennas U, or a circuit substrate, an integrated circuit and the like built into the terminal, as a test object. The multiplication arithmetic operation of the characteristics of the propagation channel and the modulation signal is performed in the frequency domain, and a time domain signal is generated from the arithmetic operation result. It's possible to considerably reduce the scale of a circuit that performs inverse Fourier transform and the scale of a circuit that generates propagation channel characteristics.

Abstract: Provided is an antenna device used for evaluating a transmission characteristic or a reception characteristic of equipment under test (EUT) having an array antenna that includes a plurality of antenna elements arranged in a plane at predetermined intervals. The antenna device includes an antenna for receiving a modulated signal radiated by the EUT via the array antenna or radiating a modulated signal to the array antenna. The antenna is disposed at a position on a z-axis perpendicular to the plane defined by the plurality of antenna elements such that a group delay distortion of the modulated signal is reduced in a near-field region.

Abstract: Provided is a technique that can generate a spread spectrum clock signal in all of an upper-spread mode, a down-spread mode, and a center-spread mode. A spread spectrum clock generator (2) spreads a spectrum of a signal with a predetermined carrier frequency to generate a spread spectrum clock signal under the control of a control unit (13). The control unit includes carrier frequency correction control means (13b). The carrier frequency correction control means shifts the predetermined carrier frequency to generate, from one spread mode, a spread spectrum clock signal of another pseudo spread mode.

Abstract: A synchronization device has a signal reception unit and a signal generation unit. The latter provides a multicarrier signal, which serves as an internally transmitted signal. The former receives the same type of externally received signal as the internally transmitted signal. An STO timing detection unit detects a position at which a correlation value in the correlation calculation between sampled data of the internally transmitted signal shifted at a predetermined sampling interval and sampled data of the externally received signal is maximum as an STO timing. A difference calculation unit calculates a difference between phases of the externally received signal and the internally transmitted signal at each subcarrier in a state in which the STO timing is detected. A correction control unit executes correction control on the signal generation unit such that a difference in a phase of each calculated subcarrier is added as a correction amount.

Abstract: An end face inspection apparatus which inspects an end face of an test object, and includes optical system causing an image acquisition unit to form an image of an end face of a held test object, focusing degree changing means for changing a distance between the end face of the test object and a focal position of the optical system, and a control unit processing image data acquired in the image acquisition unit. The end face inspection apparatus acquires a series of image data which is output from the image acquisition unit at a preset time interval while the distance between the end face of the test object and the focal position of the optical system is changed, determines whether or not each piece of the image data is focused, and selects focused image data as image data for end face inspection.

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: A measurement device includes a capability information acquisition unit that acquires capability information indicating capability of a DUT set for each item determined in advance, a setting unit that sets a measurement condition of the DUT, a measurement unit that performs measurement of the DUT on the basis of the measurement condition, a capability determination unit that notifies of capability excess information indicating that the measurement condition regarding a certain item among the measurement conditions exceeds capability determined for each item in advance on condition that the measurement condition regarding the item among the measurement conditions has been set to exceed the capability determined for each item in advance, and a display unit that displays capability excess information.

Abstract: A directional characteristic acquisition unit 51 rotates a wireless terminal 1 that is a measurement target using a terminal holding rotation mechanism 30 centering around a standard point O, measures a field intensity Pr of a radio wave received by the measurement antenna 21 at each rotation angle (?, ?) to calculate a virtual directional characteristic of a terminal antenna 1a in the wireless terminal 1. An error information output unit 60 calculates a reception angle error (??, ??), a propagation loss error E1, and a gain error E2 that occur in accordance with rotation of the wireless terminal 1, and corrects a virtual directional characteristic using these errors, using a correction unit 70, to calculate a directional characteristic Hc in a case where it is assumed that the terminal antenna 1a of the wireless terminal 1 is rotated at the position of the standard point O.

Abstract: Provided are a measurement result display device and a measurement result display method which are capable of making a list of how much difference is present between an allowable value and a measurement value of each measurement item measured by a measuring instrument, in a visually discriminable state. An allowable upper limit value indicator 21 and an allowable lower limit value indicator 22 are disposed at display positions which are set in advance in a measurement result image 20 as positions indicating an allowable upper limit value and an allowable lower limit value, and a measurement value indicator 23 is disposed at a display position calculated from display positions of the allowable upper limit value indicator 21 and allowable lower limit value indicator 22 and a measurement value measured by the measurement unit 10.

Abstract: A measuring apparatus 10 includes: a transmission and reception unit 12 which wirelessly communicates with devices 1 to 3 under test (DUTs); a measurement unit 13 which receives data from the DUTs through the transmission and reception unit 12, measures the DUTs based on the received data and outputs measurement results; a display unit 15 which displays predetermined information regarding the measurement; a disconnection related information acquisition unit 24 which, on the condition that a connection state of the wireless communication has been changed to a disconnected state, acquires disconnection related information including information indicating a reason for changing to the disconnected state and information on a state immediately before the disconnected state; and a display control unit 14 which performs control to display the disconnection related information on the display unit 15.

Abstract: Downlink signals output from a transmission and reception unit are combined with an interference signal of a CW, a resultant signal is applied to a mobile terminal, throughputs for respective interference signal frequencies for the downlink signals are collectively measured, a signal suppression band of the filter is fitted to a frequency band of the downlink signal determined not to reach a defined value, and re-measurement and re-determination of the throughput for the downlink signal among the collectively measured throughputs are performed. In a case where throughputs collectively measured at a certain interference signal frequency are equal to or greater than the defined value and a case where re-measured throughputs of all the downlink signals are equal to or greater than the defined value, the interference signal frequency is switched to the next interference signal frequency, and collective throughput measurement is performed.

Abstract: Provided is a signal generating apparatus including an inverse characteristic calculation unit that sets an amplitude characteristic of a signal as input data to calculate an inverse characteristic of a transfer function from an inverse characteristic of the amplitude characteristic of the input data, an inverse Fourier transform unit that performs inverse Fourier transform of the inverse characteristic of the transfer function, an impulse response extract unit that extracts points corresponding to a desired number of taps on the basis of a peak of the impulse response obtained by the inverse Fourier transform unit, a power spectrum calculation unit that calculates a power spectrum on the basis of values which are extracted from the impulse response, and a loss value correction unit that corrects a loss value of the power spectrum by using a loss value correction curve.

Abstract: According to one embodiment, a mobile terminal testing device which tests a mobile terminal including a plurality of transmitting antennas by transmitting/receiving radio signals between the mobile terminal testing device and the mobile terminal, includes a radio signal processing module configured to transmit and receive radio signals to and from the mobile terminal and a controller configured to cause the mobile terminal to switch one from another among the plurality of transmitting antennas by a predetermined radio signal transmitted to the mobile terminal via the radio signal processing module.