Adv Antest Corporation

Rohde and Schwarz Gmbh & Co. Kg

Yoshikazu Nakayama

Masato Haruta

Takeshi Tanabe

Hirotaka Wagata

Masao Watanabe

Hiroyuki Konno

Naoya Kimura

Minoru Iida

Takao Kawahara

Norio Arakawa

Hiroyuki Sekine

Hiroyuki Sato

Norihide Abiko

Yoshimi Sugimoto

To accurately measure a frequency characteristic of a waveform generating apparatus, provided is a measurement apparatus that measures a frequency characteristic of a waveform generating apparatus generating a signal having a waveform corresponding to waveform data, comprising a control section that causes a plurality of sine wave signals having different frequencies to be sequentially output from the waveform generating apparatus; a measuring section that measures each of the sine wave signals output from the waveform generating apparatus; and a calculating section that calculates a frequency characteristic of the waveform generating apparatus based on the measurement results of the measuring section. The control section causes trigger signals to be output from the waveform generating apparatus and causes the sine wave signals to be output in synchronization with the trigger signals, and the measuring section measures a phase of each sine wave signal with the corresponding trigger signal as a reference.

Measurement apparatus and measurement method

A reflection element determination device derives error factors in a first signal source and a second signal source based on measurement results of a signal in respective states in which reflection elements are respectively connected to the first signal source and the second signal source, and measurement results of a signal in a state in which the first signal source and the second signal source are connected with each other via a transmission element, derives transmission characteristics of the transmission element based on the measurement results of a signal in the state in which the first signal source and the second signal source are connected with each other via the transmission element and the derived error factors, and determines whether the reflection elements realize predetermined reflection states based on the derived transmission characteristics of the transmission element and transmission characteristics of the transmission element which have been known before the derivation, where the transmission characteristic of the transmission element in a direction from a first terminal to a second terminal, and the transmission characteristic of the transmission element in the opposite direction are equal to each other.

Device, method, and program for determining element, recording medium, and measurement device

An error factor determination device includes an error factor recording unit which records error factors Eija in a signal generation system which includes a signal generation unit for generating a signal and an output terminal for outputting the signal, a reflection coefficient deriving unit which derives a reflection coefficient Xm of the output terminal based on measurement results Rand Rof the signal while the signal is being output from the output terminal and the error factors Eija recorded in the error factor recording unit, and a true/false determination unit which determines whether the recorded error factors Eija are true or false based on the derived reflection coefficient Xm, and a true value of the reflection coefficient.

Device, method, program, and recording medium for error factor determination, and output correction device and reflection coefficient measurement device provided with the device

Errors of a measuring system are corrected by acquiring the phases of transmission tracking errors. A network analyzer includes a measuring system error factor recording unit which records measuring system error factors generated independently of frequency conversion carried out by a DUT, and an error factor acquiring unit which measures first coefficients and second coefficients of a correction mixer where a signal output from a terminal is a sum of a product of a signal input to the terminal and the first coefficient, and a product of a signal input to the other terminal and the second coefficient, and the ratio of magnitudes of the second coefficients is constant, and acquires the transmission tracking errors caused by the frequency conversion based on the measuring system error factors recorded in the measuring system error factor recording unit, the first coefficients, and the second coefficients.

Network analyzer, network analyzing method, program, and recording medium

Measurement of error factors of a signal source when a connection tool is connected to a signal source whether error factors of the connection tool are known or not is enabled. There is provided an error factor measurement device including a connection tool characteristic measurement unit which measures characteristics of a connection tool based on measurement results of first and second signals, a reflection-to-output ratio measurement unit which measures the ratio relating to a measurement result of a reflection in a second (first) signal generation unit and a measurement result before the first (second) signal is reflected by a first (second) output terminal, an error factor recording unit which records respective components Eiand Eoof an error factor caused by frequency tracking of a first signal generation unit, and a product of respective components EiEoof an error factor caused by frequency tracking of a second signal generation unit, and error factor deriving unit which derive respective components of the error factor caused by the frequency tracking of the second signal generation unit based on the measurement result of the characteristics of the connection tool, the measurement result of the reflection-to-output ratio measurement unit, and the recorded contents of the error factor recording unit.

Device, method, program, and recording medium for error factor measurement, and output measurement device and input measurement device provided with the device for error factor measurement

The error of a measurement system can be corrected even if the frequency of an input signal of a device under test is different from that of the output signal. A signal output acquiring section acquires the power of the input signal by a power meter not shown in the drawing. Thus, errors due to frequency tracking can be separated depending on the direction in a signal flow graph. Since a receiver measures the parameter concerning the received signal when a signal source is directly connected to a receiver, the measurement system error factor of the receiver can be acquired. The parameter of a device under test can be measured while the error is corrected when the results of measurement, concerning the device under test of receivers are combined.

Network analyzer, network analyzing method, automatic corrector, correcting method, program, and recording medium

There is provided an error factor measurement device for measuring an error factor in a switch branch signal source including a signal source and a switch, and the error factor measurement device includes a reference error factor component recording unit which records respective components E, Eof a frequency tracking error factor when a predetermined output terminal is connected to a signal source, a derived error factor product recording unit which records an error factor product E&#xd7;Ewhich is a product of respective components of a frequency tracking error factor when respective multiple output terminals other than predetermined output terminal are connected to the signal source, an error factor ratio deriving unit which derives an error factor ratio E/E, and a frequency tracking error factor deriving unit which derives E, Ebased on the error factor product and the error factor ratio, where E/E=E/Eholds.

Device, method, program, and recording medium for error factor measurement, and output correction device and reflection coefficient measurement device provided with the device for error factor measurement

There is reduced labor to directly connect two ports selected from ports of a network analyzer in order to measure transmission tracking errors. A network analyzer, to which a test set which branches four ports to nine ports (main port group: three ports, and sub port groups: three ports &#xd7;2) is connected, includes transmission/reception ports, a transmission tracking error determining unit which determines transmission tracking errors of a combination of one of possible connections in the main port group and one of possible connections in the sub port groups for all the possible connections in the main port group based on signals before transmitted by the transmission/reception ports and reception signals, and a transmission tracking error deriving unit which derives other transmission tracking errors based on the transmission tracking errors determined by the transmission tracking error determining unit.

Network analyzer, transmission tracking error measuring method, network analyzing method, program, and recording medium

There are measured characteristics of a jig (fixture) used to calculate and measure circuit parameters of a device under test. There is provided a jig characteristic measuring device which measures the jig characteristics of a jig which includes signal lines used to connect a DUT and a network analyzer with each other (namely, the reflection characteristics of the signal lines, and the transmission S parameters), measures the reflection coefficients of the signal lines in an open state where the DUT is not connected to the signal lines measures the reflection coefficients of the signal lines in a short-circuit state where all the signal lines are grounded, and derives the jig characteristics of the jig based on these measured results.

Fixture characteristic measuring device, method, program, recording medium, network analyzer, and semiconductor test device

A multi-port device analysis apparatus is capable of analyzing a multi-port device having three or more with improved efficiency and accuracy. The multi-port device analysis apparatus includes: a signal source () for providing a test signal to one of terminals of a multi-port device under test (DUT); a plurality of test ports (P-Pn) for connecting all of the terminals of the multi-port DUT to the corresponding test ports; a plurality of measurement units (MU-MUn) for measuring signals from the corresponding test ports; a reference signal measurement unit (R) for measuring the test signal for obtaining reference data; a plurality of terminal resistors (TR-TRn) each being assigned to one of the test ports; and switch means (SW-SWn) for selectively providing the test signal to one of the test ports (input port) and disconnecting the terminal resistor from the input port while connecting the terminal resistors to all the other test ports; wherein parameters of the multi-port DUT are acquired without changing the connections between the test ports and the terminals of the DUT, while changing selection of the test port until all of the test port being assigned as the input port.

Multi-port analysis apparatus and method and calibration method thereof

A measurement system for circuit parameters of a device under test (DUT) that reduces the number of attachments and detachments of calibration kits. An error factor acquisition device includes a first calibrator connected to ports of a network analyzer that has a first state realization unit that determines open-circuit, short-circuit, and standard load states for the ports. Second calibrators connected to the first calibrator and the DUT have a second state realization unit that determines open-circuit, short-circuit, and standard load states for the ports. The first calibrator includes first connection units that connect the ports to the first state realization unit or to the respective second calibrators, while the second calibrators respectively include a second connection unit that connects the ports to the second state realization unit or the DUT.

Error factor acquisition device, method, program, and recording medium

It is possible to apply a correct power to a load even when the output impedance and a load impedance of a signal source are different from a characteristic impedance of a transmission line. The power applied to the load can be expressed by a measurement system error factor, a load coefficient X of the load, and an S parameter of the input signal R. Accordingly, a target input signal decision can decide a target value of the S parameter of the input signal R according to the power desired to be applied to the load, the measurement system error factor, and the load coefficient X of the load. Furthermore, an input signal level control section controls the input signal level so that the S parameter of the input signal R has this target value. This is performed by changing the amplification ratio of an amplification ratio variable amplifier. Thus, it is possible to apply a desired power to the load not depending on whether the impedance is matched or not.

Power supply device, method, program, recording medium, network analyzer, and spectrum analyzer

A network analyzer includes a raw data measuring portion for measuring an S parameter of a device under test, a measuring-system error-factor measuring portion for obtaining measuring-system error factors occurring in the measurement of the device under test, a parameter conversion factor calculating portion for obtaining a parameter conversion factor indicative of the relationship between impedance and measuring system error-factor-free data obtained by eliminating measuring-system error factors from the S parameter, an extended error-factor calculating portion for obtaining extended error factors by combining the measurement-system error factors and the parameter conversion factor, and a device-under-test calculating portion for obtaining the impedance from the S parameter and the extended error factors. Accordingly, the need for fixtures is eliminated and, further, the extended error factors are obtained in advance. Therefore, operation of the network analyzer can be simplified and the calculating speeds increased.

Network analyzer, network analytical method and recording medium

A multi-port device analysis apparatus is capable of analyzing a multi-port device having three or more with improved efficiency and accuracy. The multi-port device analysis apparatus includes: a signal source for providing a test signal to one of terminals of a multi-port device under test (DUT); a plurality of test ports for connecting all of the terminals of the multi-port DUT to the corresponding test ports; a plurality of measurement units for measuring signals from the corresponding test ports; a reference signal measurement unit for measuring the test signal for obtaining reference data; a plurality of terminal resistors each being assigned to one of the test ports; and switch means for selectively providing the test signal to one of the test ports (input port) and disconnecting the terminal resistor from the input port while connecting the terminal resistors to all the other test ports; wherein parameters of the multiport DUT are acquired without changing the connections between the test ports and the terminals of the DUT, while changing selection of the test port until all of the test port being assigned as the input port.

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Saitama, Japan

Yoshikazu Nakayama