Abstract:
PURPOSE: To provide a terminal having satisfactory frequency characteristics in a supper high frequency range, which is used for the transmission line of a spectrum analyzer or a network analyzer as electronic measuring equipment. CONSTITUTION: When a signal in the super high frequency range is inputted to a signal line 1 of a terminal 8 while using a coaxial cable 6 or the like as a transmission line, a GND-Plane A 3 having a ground potential is provided on both sides on the same plane of a circuit board 7 parallelly with a signal propagating direction with the signal line 1 as a center. A resistor 2 is provided to connect those GND-Plane A 3 and signal line 1 on three planes and a grounded coplanar line is formed with a GND-Plane B and plural through holes A5 provided on the rear face of the circuit board.
Abstract:
PROBLEM TO BE SOLVED: To easily calibrate a signal generating system such as a switch branch signal source. SOLUTION: An error factor determination device 20 is provided with an error factor recording part for recording error factors Eija in the signal generating system 100 having both a signal generating part 12 for generating signals and an output terminal 19a for outputting signals; a reflection coefficient deriving part 24 for deriving a reflection coefficient of the output terminal 19a on the basis of measurement results R1 and R2 of signals in a state in which the output terminal 19a is outputting signals and the error factors Eija recorded in the error factor recording part; and a validity determination part for determining the validity of the recorded error factors Eija on the basis of a derived reflection coefficient Xm and a true value of a reflection coefficient. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a network analyzer, network analysis method, automatic calibration machine, calibration method, program and recording medium that enable error compensation of measuring system, even if frequency of input signal is different from that of the output signal for the measuring object. SOLUTION: In this method, signal output acquiring section 62 acquires power of the input signal by a power meter (not shown). As a result, errors caused by frequency tracking, such as, Er1 or Er2 can be separated, depending on directions in signal flow graph. Furthermore, measurement system error-cause Et in receiving means 20 can also be acquired, because a receiver (TR) 26a measures the S parameter on the signal received, when a signal source 10 is directed connected to the receiving means 20. Then the S parameter on DUT2 can be measured, while the error is compensated by combining with measured results on DUT2 from a receiver (RS) 16a, a receiver (TS) 16b and a receiver (TR) 26a. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To easily calibrate a signal generating system such as a switch branch signal source. SOLUTION: An error factor determination device 20 is provided with a first port error factor acquisition part 22 for acquiring first port error factors Eija, error factors on an output terminal for measurement of a switch branch signal source, on the basis of measurement results of signals; a switch part error factor recording part 24 for recording switch part error factors Qija, Qijb, Qijc, and Qijd, error factors of a switch; a signal source error factor acquisition part 28a for acquiring signal source error factors Pij, error factors on the signal source, on the basis of the switch part error factor Qija on the output terminal for measurement among the switch part error factors and the first port error factor Eija; and a second port error factor deriving part 28b for deriving second port error factors Eijb on the basis of signal source error factors Pij and the switch part error factors Qijb on output terminals except the output terminal for measurement among the switch part error factors. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To calibrate a system for measuring circuit parameters of a measured object and reduce the number of attachments and removals of a calibration kit. SOLUTION: A network analyzer 1 is provided with a first calibrator 100, connected to ports 18, 28 and having a first state achieving part 120 for achieving opened, shorted and standard loads on the ports 18, 28 or shorting the ports 18, 28, and a second calibrator 200, connected to the first calibrator 100 and a DUT 400 and having a second state achieving part 220 for achieving the opened, shorted and standard loads on the ports 18, 28. The first calibrator 100 has first connections 110a, 110b for connecting the ports 18, 28 to one of the first state achieving part 120 and the second calibrator 200, and the second calibrator 200 has a second connection 210 for connecting the ports 18, 28 to either the second state achieving part 220 or the DUT 400. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a network analyzer in which an error is hard to generate even when an ideal terminating resistance does not exist and which measures DUTs in a plurality of ports. SOLUTION: The network analyzer is provided with a power-supply port 8a which is connected to one measuring port 40a of an object 40 to be measured and to which a power supply 9 is connected. The network analyzer is provided with terminating ports 8b to 8n which are connected to ports 40b to 40n, of the object 40 to be measured, other than the measuring port 8a so as to be grounded via grounding resistances 6a, 6b to 6n. The network analyzer is provided with circuit-parameter measuring parts 20a, 20b to 20n which are connected respectively to the port 8a and the ports 8b to 8n and which measure an S parameter regarding the ports 40a, 40b to 40n. The parts 20a, 20b to 20n which are connected to the ports 8b to 8n measure the S parameter regarding the ports 8b to 8n. Thereby, even when the S parameter regarding the ports 8b to 8n cannot be regarded as 0, the S parameter of the object 40, to be measured, comprising a plurality of ports can be measured.
Abstract:
PROBLEM TO BE SOLVED: To eliminate a measurement error, increase the utilization value, and improve the technical value by making calibration via calculation when the value of the reflection coefficient of a load element is known even if it is not ideal nonreflection. SOLUTION: A calibration kit having a known reflection coefficient is used, and three kinds of elements including an open element, a short element, and a load element are prepared. The reflection coefficients of the elements, i.e., the reflection coefficient Aopen of the open element, the reflection coefficient Ashort of the short element, and the reflection coefficient Aload of the load element, are stored in the memory section of a network analyzer. The open element is connected to the input/output terminal of the network analyzer, a signal is sent from a signal source, and a response signal is measured at a reception section. Measured values of S11m are stored in the memory section as f(open), f(short), and f(load). Ed, Es, Er are obtained by an arithmetic section according to the first equation with the reflection coefficients Aopen, Ashort, Aload and measured values (f), and calibration is made.
Abstract:
PROBLEM TO BE SOLVED: To accurately measure frequency characteristics of a waveform generating device.SOLUTION: A measuring device which measures frequency characteristics of a waveform generating device which generates waveform signals corresponding to waveform data, comprises: a control unit which controls the waveform generating device to sequentially output a plurality of sinusoidal signals having different frequencies; a measurement unit which measures the respective sinusoidal signals output from the waveform generating device; and a calculation unit which calculates frequency characteristics of the waveform generating device on the basis of the measurement result by the measurement unit. The control unit controls the waveform generating device to output trigger signals, and also to output the plurality of sinusoidal signals by synchronizing the respective sinusoidal signals with the trigger signals. The measurement unit is an oscilloscope which receives the trigger signals and the sinusoidal signals, and takes in the sinusoidal signals on the basis of the trigger signals.
Abstract:
PROBLEM TO BE SOLVED: To easily calibrate a signal generating system such as a switch branch signal source. SOLUTION: An error factor determination device 20 is provided with an error factor recording part for recording error factors Eija in the signal generating system 100 having both a signal generating part 12 for generating signals and an output terminal 19a for outputting signals; a reflection coefficient deriving part 24 for deriving a reflection coefficient of the output terminal 19a on the basis of measurement results R1 and R2 of signals in a state in which the output terminal 19a is outputting signals and the error factors Eija recorded in the error factor recording part; and a validity determination part for determining the validity of the recorded error factors Eija on the basis of a derived reflection coefficient Xm and a true value of a reflection coefficient. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To acquire a phase of transmission tracking to correct an error in a measuring system. SOLUTION: This analyzer is provided with: a measuring system error factor recording part 80 for recording a measuring system error factor generated irrelevant to frequency conversion by a DUT 2; and an error factor acquiring part 90 for acquiring the transmission tracking generated by the frequency conversion, based on the measuring system error factor recorded in the measuring system error factor recording part 80 and the first coefficient and the second coefficient, by measuring the first coefficient and the second coefficient of a calibration mixer wherein a signal output from a terminal 2a is expressed as a sum of a value obtained by multiplying a signal input into the terminal 2a with the first coefficient, and a value obtained by multiplying a signal input into the other terminal 2b with the second coefficient, and wherein a level ratio of the second coefficient is constant. COPYRIGHT: (C)2005,JPO&NCIPI