JP5128057B2

JP5128057B2 - Method and apparatus for analyzing network characteristics

Info

Publication number: JP5128057B2
Application number: JP2005189837A
Authority: JP
Inventors: 原田耕自
Original assignee: Agilent Technologies Inc
Current assignee: Agilent Technologies Inc
Priority date: 2005-06-29
Filing date: 2005-06-29
Publication date: 2013-01-23
Anticipated expiration: 2025-06-29
Also published as: WO2007005139A1; JP2007010412A

Description

本発明は、網特性を解析する技術に係り、特に、複数の変調方式により変調された信号を観測することにより各変調方式に関連する信号経路の特性を解析する技術に関する。 The present invention relates to a technique for analyzing network characteristics, and more particularly to a technique for analyzing characteristics of a signal path related to each modulation scheme by observing signals modulated by a plurality of modulation schemes.

近年、移動体通信システムにおいて、極座標変調方式が採用される傾向にある。極座標変調方式は、信号空間上における信号点を、振幅成分ｒと偏角成分θで表現する方式である（例えば、特許文献２を参照。）。なお、振幅成分は、振幅信号、絶対値成分または絶対値信号とも称する。また、偏角成分は、偏角信号、位相成分または位相信号とも称する。さらに、本明細書では、振幅成分と偏角成分を総じて、極座標成分または極座標信号と称する。この極座標変調方式は、信号増幅器の電力効率を高めることができる。ここで、図１を参照する。図１は、極座標変調方式の概念を示すブロック図である。極座標信号発生器１１０は、ディジタルデータから振幅成分ｒおよび位相成分θを生成する。搬送波信号源１２０から出力される信号は、位相変調器１３０において、位相成分θにより位相変調が施される。位相変調された信号は、極座標アンプ１４０において、さらに、振幅成分ｒにより振幅変調が施される。このように極座標変調方式により生成された信号を、極座標変調信号と称する。なお、極座標アンプ１４０において、可変利得飽和増幅器１４３が、位相変調器１３０の出力信号を振幅成分ｒで振幅変調する。ローパスフィルタ１４１およびバンドパスフィルタ１４２は、関連する信号を最適化するものである。 In recent years, a polar coordinate modulation method tends to be adopted in mobile communication systems. The polar modulation method is a method of expressing a signal point on a signal space with an amplitude component r and a declination component θ (see, for example, Patent Document 2). The amplitude component is also referred to as an amplitude signal, an absolute value component, or an absolute value signal. The declination component is also referred to as declination signal, phase component, or phase signal. Further, in this specification, the amplitude component and the declination component are collectively referred to as a polar coordinate component or a polar coordinate signal. This polar modulation method can increase the power efficiency of the signal amplifier. Reference is now made to FIG. FIG. 1 is a block diagram illustrating the concept of polar coordinate modulation. The polar coordinate signal generator 110 generates an amplitude component r and a phase component θ from digital data. The signal output from the carrier signal source 120 is subjected to phase modulation by the phase component θ in the phase modulator 130. The phase-modulated signal is further subjected to amplitude modulation by the amplitude amplifier r in the polar coordinate amplifier 140. The signal thus generated by the polar modulation method is referred to as a polar modulation signal. In the polar amplifier 140, the variable gain saturation amplifier 143 modulates the output signal of the phase modulator 130 with the amplitude component r. The low-pass filter 141 and the band-pass filter 142 are for optimizing related signals.

特開２００４−３５６８３５号公報JP 2004-356835 A 特開２００５−８６６７３号公報JP 2005-86673 A 特開２００４−３６１１７０号公報JP 2004-361170 A

バンドパスフィルタ１４１およびローパスフィルタ１４２が適切に調整されていない場合、位相変調器１３０での位相変調や極座標アンプ１４０での振幅変調が正しく実施されない。バンドパスフィルタ１４１およびローパスフィルタ１４２を適切に調整するためには、バンドパスフィルタ１４１およびローパスフィルタ１４２の特性を知る必要がある。しかし、極座標アンプ１４０が１つのデバイスとして組み立てられた後では、バンドパスフィルタ１４１への入力信号、ローパスフィルタ１４２への入力信号、および極座標アンプ１４０の出力信号しか観測することができない。従って、従来のネットワークアナライザでは、極座標アンプ１４０の出力信号を観測しても、バンドパスフィルタ１４１およびローパスフィルタ１４２の特性を測定することができない。 When the band pass filter 141 and the low pass filter 142 are not properly adjusted, the phase modulation by the phase modulator 130 and the amplitude modulation by the polar amplifier 140 are not correctly performed. In order to appropriately adjust the band pass filter 141 and the low pass filter 142, it is necessary to know the characteristics of the band pass filter 141 and the low pass filter 142. However, after the polar amplifier 140 is assembled as one device, only the input signal to the band pass filter 141, the input signal to the low pass filter 142, and the output signal of the polar amplifier 140 can be observed. Therefore, the conventional network analyzer cannot measure the characteristics of the band pass filter 141 and the low pass filter 142 even if the output signal of the polar coordinate amplifier 140 is observed.

そこで、本発明は、被測定物から出力される、複数の変調方式により変調された信号を観測することにより、変調信号の特定成分または特定の変調方式に関連する、被測定物内の特定箇所の網特性を解析する方法および装置を提供することを目的とする。また、極座標アンプに内蔵されるフィルタの網特性を解析することを目的とする。 Therefore, the present invention observes a signal modulated from a plurality of modulation methods output from the device under test, thereby identifying a specific location in the device under test related to a specific component of the modulation signal or a specific modulation method. It is an object of the present invention to provide a method and an apparatus for analyzing the network characteristics of a network. Another object of the present invention is to analyze the network characteristics of a filter built in a polar amplifier.

本第一の発明は、被測定物の網特性を解析する方法であって、前記被測定物に基準変調信号を印加するか、前記被測定物の出力信号から基準変調信号を生成するステップと、前記被測定物の出力信号から、前記出力信号の各成分を生成するステップと、前記基準変調信号から、前記基準変調信号の各成分を生成するステップと、前記出力信号の成分と対応する前記基準変調信号の成分とに基づいて、前記被測定物の網特性を解析するステップとを含むことを特徴とするものである。 This first aspect of the present invention includes the steps of generating a process of analyzing the network properties of the object to be measured, or applying a reference modulation signal to said object to be measured, a reference modulation signal from the output signal of said object to be measured A step of generating each component of the output signal from the output signal of the device under test; a step of generating each component of the reference modulation signal from the reference modulation signal; and the component corresponding to the component of the output signal And analyzing a network characteristic of the device under test based on a component of a reference modulation signal.

本第二の発明は、被測定物の網特性を解析する方法であって、前記被測定物に基準変調信号を印加するか、前記被測定物の出力信号から基準変調信号を生成するステップと、前記被測定物の出力信号を、互いに異なる１以上のＮ個の復調方式のそれぞれで復調し、復調結果であるＮ個の復調信号を得るステップと、前記基準変調信号を、前記Ｎ個の復調方式のそれぞれで復調し、復調結果であるＮ個の復調信号を得るステップと、同一復調方式に基づく前記出力信号の復調信号と前記基準変調信号の復調信号とに基づいて、前記被測定物の網特性を解析するステップとを含むことを特徴とするものである。 The second invention is a method for analyzing a network characteristic of an object to be measured, the step of applying a reference modulation signal to the object to be measured or generating a reference modulation signal from an output signal of the object to be measured; The output signal of the device under test is demodulated by each of one or more N demodulation methods different from each other to obtain N demodulated signals as demodulation results; The DUT is demodulated by each of the demodulation methods to obtain N demodulated signals as demodulation results, and based on the demodulated signal of the output signal and the demodulated signal of the reference modulation signal based on the same demodulation method Analyzing the network characteristics of the network.

本第三の発明は、本第二の発明のおいて、前記解析ステップが、少なくとも１つの復調方式について、前記出力信号の復調信号を関連する復調方式と対になる変調方式で変調した結果と、前記基準変調信号の復調信号を関連する復調方式と対になる変調方式で変調した結果とに基づいて、前記被測定物の網特性を解析することを特徴とするものである。 According to a third aspect of the invention, in the second aspect of the invention, the analysis step modulates the demodulated signal of the output signal with a modulation scheme that is paired with a related demodulation scheme for at least one demodulation scheme; The network characteristic of the device under test is analyzed on the basis of the result of modulating the demodulated signal of the reference modulation signal with a modulation method paired with the related demodulation method.

本第四の発明は、被測定物の網特性を解析する方法であって、前記被測定物に基準変調信号を印加するか、前記被測定物の出力信号から基準変調信号を生成するステップと、前記被測定物の出力信号を振幅復調し、前記出力信号の振幅成分である振幅復調信号を得るステップと、前記出力信号を位相復調し、前記出力信号の位相成分である位相復調信号を得るステップと、前記基準変調信号を振幅復調し、前記基準信号の振幅成分である基準振幅信号を得るステップと、前記基準変調信号を位相復調し、前記基準信号の位相成分である基準位相信号を得るステップと、前記振幅復調信号と前記基準振幅信号とに基づいて、前記被測定物の網特性を解析するステップと、前記位相復調信号と前記基準位相信号とに基づいて、前記被測定物の網特性を解析するステップとを含むことを特徴とするものである。 The fourth invention is a method for analyzing a network characteristic of an object to be measured, the step of applying a reference modulation signal to the object to be measured or generating a reference modulation signal from an output signal of the object to be measured; , Amplitude demodulating the output signal of the device under test to obtain an amplitude demodulated signal that is an amplitude component of the output signal, and phase demodulating the output signal to obtain a phase demodulated signal that is a phase component of the output signal And amplitude demodulating the reference modulation signal to obtain a reference amplitude signal that is an amplitude component of the reference signal; and phase demodulating the reference modulation signal to obtain a reference phase signal that is a phase component of the reference signal Analyzing a network characteristic of the device under test based on the amplitude demodulated signal and the reference amplitude signal; and a network of the device under test based on the phase demodulated signal and the reference phase signal. Special It is characterized in that comprising the step of analyzing the.

本第五の発明は、本第四の発明において、前記位相復調信号と前記基準位相信号とに基づいて前記被測定物の網特性を解析するステップが、前記位相復調信号を関連する位相復調方式と対になる位相変調方式で変調した結果と、前記基準位相信号を同位相変調方式で変調した結果とに基づいて、前記被測定物の網特性を解析することを特徴とするものである。 According to a fifth aspect of the present invention, in the fourth aspect of the invention, the step of analyzing the network characteristics of the device under test based on the phase demodulated signal and the reference phase signal includes a phase demodulating method related to the phase demodulated signal. The network characteristic of the object to be measured is analyzed based on the result of modulation by the phase modulation method paired with and the result of modulation of the reference phase signal by the same phase modulation method.

本第六の発明は、被測定物の網特性を解析する装置であって、前記被測定物に基準変調信号を印加するか、前記被測定物の出力信号から基準変調信号を生成する手段と、前記被測定物の出力信号から、前記出力信号の各成分を生成する手段と、前記基準変調信号から、前記基準変調信号の各成分を生成する手段と、前記出力信号の成分と対応する前記基準変調信号の成分とに基づいて、前記被測定物の網特性を解析する手段とを備えることを特徴とするものである。 This sixth invention comprises means for generating a device for analyzing the network properties of the object to be measured, or applying a reference modulation signal to said object to be measured, a reference modulation signal from the output signal of said object to be measured , Means for generating each component of the output signal from the output signal of the device under test, means for generating each component of the reference modulation signal from the reference modulation signal, and the component corresponding to the component of the output signal And means for analyzing a network characteristic of the device under test based on a component of a reference modulation signal.

本第七の発明は、被測定物の網特性を解析する装置であって、前記被測定物に基準変調信号を印加するか、前記被測定物の出力信号から基準変調信号を生成する手段と、前記被測定物の出力信号を、互いに異なる１以上のＮ個の復調方式のそれぞれで復調し、復調結果であるＮ個の復調信号を得る手段と、前記基準変調信号を、前記Ｎ個の復調方式のそれぞれで復調し、復調結果であるＮ個の復調信号を得る手段と、同一復調方式に基づく前記出力信号の復調信号と前記基準変調信号の復調信号とに基づいて、前記被測定物の網特性を解析する手段とを備えることを特徴とするものである。 This seventh invention, the means for generating a device for analyzing the network properties of the object to be measured, or applying a reference modulation signal to said object to be measured, a reference modulation signal from the output signal of said object to be measured The output signal of the device under test is demodulated by each of one or more N demodulation methods different from each other to obtain N demodulated signals which are demodulation results, and the reference modulation signal is the N modulated signals. Based on the demodulated signal of the output signal based on the same demodulation method and the demodulated signal of the reference modulation signal based on the means for obtaining N demodulated signals that are demodulated by each demodulation method, And means for analyzing the network characteristics.

本第八の発明は、本第七の発明において、前記解析手段が、少なくとも１つの復調方式について、前記出力信号の復調信号を関連する復調方式と対になる変調方式で変調した結果と、前記基準変調信号の復調信号を関連する復調方式と対になる変調方式で変調した結果とに基づいて、前記被測定物の網特性を解析することを特徴とするものである。 According to an eighth aspect of the present invention, in the seventh aspect, the analysis unit modulates the demodulated signal of the output signal with a modulation scheme that is paired with an associated demodulation scheme for at least one demodulation scheme; The network characteristic of the device under test is analyzed on the basis of the result of modulating the demodulated signal of the reference modulation signal with a related modulation method and a corresponding modulation method.

被測定物の網特性を解析する装置であって、前記被測定物に基準変調信号を印加するか、前記被測定物の出力信号から基準変調信号を生成する手段と、前記被測定物の出力信号を振幅復調し、前記出力信号の振幅成分である振幅復調信号を得る手段と、前記出力信号を位相復調し、前記出力信号の位相成分である位相復調信号を得る手段と、前記基準変調信号を振幅復調し、前記基準信号の振幅成分である基準振幅信号を得る手段と、前記基準変調信号を位相復調し、前記基準信号の位相成分である基準位相信号を得る手段と、前記振幅復調信号と前記基準振幅信号とに基づいて、前記被測定物の網特性を解析する手段と、前記位相復調信号と前記基準位相信号とに基づいて、前記被測定物の網特性を解析する手段とを備えることを特徴とするものである。 An apparatus for analyzing a network characteristic of an object to be measured, the means for applying a reference modulation signal to the object to be measured or generating a reference modulation signal from an output signal of the object to be measured, and an output of the object to be measured Means for demodulating a signal to obtain an amplitude demodulated signal that is an amplitude component of the output signal; means for phase demodulating the output signal to obtain a phase demodulated signal that is a phase component of the output signal; and the reference modulation signal Means for obtaining a reference amplitude signal that is an amplitude component of the reference signal, means for phase-demodulating the reference modulation signal to obtain a reference phase signal that is a phase component of the reference signal, and the amplitude demodulation signal And means for analyzing the network characteristics of the device under test based on the reference amplitude signal, and means for analyzing the network characteristics of the device under test based on the phase demodulated signal and the reference phase signal. It is characterized by having It is intended.

本第十の発明は、前記位相復調信号と前記基準位相信号とに基づいて前記被測定物の網特性を解析する手段が、前記位相復調信号を関連する位相復調方式と対になる位相変調方式で変調した結果と、前記基準位相信号を同位相変調方式で変調した結果とに基づいて、前記被測定物の網特性を解析することを特徴とするものである。 In the tenth aspect of the present invention, there is provided a phase modulation method in which means for analyzing the network characteristics of the device under test based on the phase demodulated signal and the reference phase signal is paired with the phase demodulated method related to the phase demodulated signal The network characteristics of the device under test are analyzed based on the result of modulation in step (b) and the result of modulation of the reference phase signal by the same phase modulation method.

本第十一の発明は、本第一乃至本第五のいずれかの発明において、前記被測定物は、前記基準信号が印加される時に変調信号を出力することを特徴とするものである。 The eleventh invention is characterized in that, in any of the first to fifth inventions, the device under test outputs a modulation signal when the reference signal is applied.

本第十二の発明は、本第六乃至本第十のいずれかの発明において、前記被測定物は、前記基準信号が印加される時に変調信号を出力することを特徴とするものである。 The twelfth invention is characterized in that, in any of the sixth to tenth inventions, the device under test outputs a modulation signal when the reference signal is applied.

本発明によれば、変調信号の特定成分または特定の変調方式に関連する、被測定物内の特定箇所の網特性を解析することができる。これにより、極座標アンプ内のフィルタの網特性を解析することができる。 ADVANTAGE OF THE INVENTION According to this invention, the network characteristic of the specific location in a to-be-measured object relevant to the specific component of a modulation signal or a specific modulation system can be analyzed. Thereby, the network characteristics of the filter in the polar coordinate amplifier can be analyzed.

本発明の実施の形態を、添付の図面を参照しながら、以下に説明する。本発明の第一の実施形態は、電子測定装置３００である。ここで、図２を参照する。図２は、被測定物である信号発生装置２００と、電子測定装置３００を示す図である。図において、基準信号Ｓ_Ｒが信号発生装置２００に印加され、信号発生装置２００の出力信号が電子測定装置３００に印加される。まず、被測定物２００について簡単に説明し、その次に電子測定装置３００について説明する。被測定物２００は、振幅／位相分解器２１０と、搬送波信号源２２０と、位相変調器２３０と、極座標アンプ２４０を備える。振幅／位相分解器２１０は、印加される基準信号Ｓ_Ｒを振幅成分ｒと位相成分θとに分解して出力する装置である。搬送波信号源２２０は、定振幅の正弦波信号を発生する装置である。搬送波信号源２２０の出力信号は、位相変調器２３０において位相成分θにより位相変調され、さらに、極座標アンプ２４０において振幅成分ｒにより振幅変調される。極座標アンプ２４０は、バンドパスフィルタ２４１と、ローパスフィルタ２４２と、可変利得飽和増幅器２４３とを具備する。バンドパスフィルタ２４１は、位相変調器２３０の出力信号を最適化するものである。ローパスフィルタ２４２は、振幅成分ｒを最適化するものである。バンドパスフィルタ２４１の出力信号は、可変利得飽和増幅器２４３で増幅される。可変利得飽和増幅器２４３の利得は、ローパスフィルタ２４２の出力信号により制御される。 Embodiments of the present invention will be described below with reference to the accompanying drawings. The first embodiment of the present invention is an electronic measurement apparatus 300. Reference is now made to FIG. FIG. 2 is a diagram showing a signal generation device 200 and an electronic measurement device 300 which are measured objects. In the figure, the reference signal S _R is applied to the signal generator 200, the output signal of the signal generator 200 is applied to an electronic measuring device 300. First, the DUT 200 will be briefly described, and then the electronic measuring device 300 will be described. The DUT 200 includes an amplitude / phase decomposer 210, a carrier signal source 220, a phase modulator 230, and a polar amplifier 240. Amplitude / phase decomposer 210 is an apparatus for decomposing and outputting a reference signal S _R to be applied to the amplitude component r and a phase component theta. The carrier signal source 220 is a device that generates a constant amplitude sine wave signal. The output signal of the carrier signal source 220 is phase-modulated by the phase component θ in the phase modulator 230 and further amplitude-modulated by the amplitude component r in the polar coordinate amplifier 240. The polar amplifier 240 includes a band pass filter 241, a low pass filter 242, and a variable gain saturation amplifier 243. The band pass filter 241 optimizes the output signal of the phase modulator 230. The low-pass filter 242 optimizes the amplitude component r. The output signal of the band pass filter 241 is amplified by the variable gain saturation amplifier 243. The gain of the variable gain saturation amplifier 243 is controlled by the output signal of the low pass filter 242.

次に、電子測定装置３００の構成について説明する。電子測定装置３００は、アナログ・ディジタル変換器３１０と、アナログ・ディジタル変換器３２０と、基準信号発生器３３０と、プロセッサ４００とを備える。アナログ・ディジタル変換器は、以下、ＡＤＣと称する。ＡＤＣ３１０は、被測定物２００の出力である被測定信号Ｓ_Ｔをアナログ・ディジタル変換する装置であって、変換結果がプロセッサ４００へ出力される。基準信号発生器３３０は、基準信号Ｓ _Ｒを発生する装置である。ＡＤＣ３２０は、基準信号Ｓ _Ｒをアナログ・ディジタル変換する装置であって、変換結果がプロセッサ４００へ出力される。プロセッサ４００は、ＡＤＣ３１０およびＡＤＣ３２０から出力されるディジタル値に基づき被測定物２００の網特性を解析する。プロセッサ４００は、ＣＰＵ、ＭＰＵ、ＲＩＳＣまたはＤＳＰなどのような数値演算能力を有するプロセッサである。なお、プロセッサ４００は、ＣＰＵなどと同じように機能するものであればＦＰＧＡやＡＳＩＣなどであっても良い。プロセッサ４００は、図示しないプログラムを実行することにより、振幅／位相分解器４１０および振幅／位相分解器４２０および網特性解析器４３０および網特性解析器４４０として機能する。 Next, the configuration of the electronic measurement apparatus 300 will be described. The electronic measurement apparatus 300 includes an analog / digital converter 310, an analog / digital converter 320, a reference signal generator 330, and a processor 400. The analog / digital converter is hereinafter referred to as ADC. ADC310 is a device that performs analog-digital conversion of the measured signal _{S T} which is the output of the DUT 200, the conversion result is output to the processor 400. Reference signal generator 330 is a device for generating a reference signal S _R. ADC320 is a reference signal _{S R} to a device for analog-to-digital conversion, the conversion result is output to the processor 400. Processor 400 analyzes the network properties of the object to be measured 200 based on the digital value outputted from ADC310, and ADC 320. The processor 400 is a processor having a numerical operation capability such as a CPU, MPU, RISC or DSP. Note that the processor 400 may be an FPGA, an ASIC, or the like as long as it functions in the same manner as a CPU. The processor 400 functions as an amplitude / phase decomposer 410, an amplitude / phase decomposer 420, a network characteristic analyzer 430, and a network characteristic analyzer 440 by executing a program (not shown).

振幅／位相分解器４１０および振幅／位相分解器４２０は、入力される信号を振幅成分（振幅信号）と位相成分（位相信号）とに分解するものである。振幅／位相分解器４１０は、振幅／位相分解のために、振幅復調器４１１と位相復調器４１２を含む。振幅復調器４１１は、振幅／位相分解器４１０に入力される被測定信号Ｓ_Ｔを振幅復調することにより、被測定信号Ｓ_Ｔの振幅成分である振幅復調信号Ｓ_Ｔｒを生成し、振幅復調信号Ｓ_Ｔｒを出力するものである。位相復調器４１２は、被測定信号Ｓ_Ｔを位相復調することにより、被測定信号Ｓ_Ｔの位相成分である位相復調信号Ｓ_Ｔθを生成し、位相復調信号Ｓ_Ｔθを出力するものである。振幅／位相分解器４２０は、振幅／位相分解のために、振幅復調器４２１と位相復調器４２２を含む。振幅復調器４２１は、振幅／位相分解器４２０に入力される基準信号Ｓ_Ｒを振幅復調することにより、基準信号Ｓ_Ｒの振幅成分である基準振幅信号Ｓ_Ｒｒを生成し、基準振幅信号Ｓ_Ｒｒを出力するものである。位相復調器４２２は、基準信号Ｓ_Ｒを位相復調することにより、基準信号Ｓ_Ｒの位相成分である基準位相信号Ｓ_Ｒθを抽出し、基準位相信号Ｓ_Ｒθを出力するものである。なお、振幅復調器４１１および振幅復調器４２１は、同じ復調方式である。また、位相復調器４１２および位相復調器４２２は、同じ復調方式である。網特性解析器４３０および網特性解析器４４０は、入力される２つの信号に基づいて網特性を解析するものである。 The amplitude / phase decomposer 410 and the amplitude / phase decomposer 420 decompose an input signal into an amplitude component (amplitude signal) and a phase component (phase signal). The amplitude / phase decomposer 410 includes an amplitude demodulator 411 and a phase demodulator 412 for amplitude / phase decomposition. Amplitude demodulator 411, the amplitude / phase decomposer 410 measured signal S _T inputted to by amplitude demodulation, and generates an amplitude demodulated signal S _Tr is the amplitude component of the measured signal S _T, the amplitude demodulated signal _STr is output. Phase demodulator 412, by phase demodulating the signal S _T to be measured, in which generating a phase demodulated signal S _T.theta a phase component of the measured signal S _T, and outputs a phase demodulation signal S _T.theta. The amplitude / phase decomposer 420 includes an amplitude demodulator 421 and a phase demodulator 422 for amplitude / phase decomposition. Amplitude demodulator 421, by amplitude demodulating the reference signal S _R to be inputted to the amplitude / phase decomposer 420 generates a reference amplitude signal S _Rr is the amplitude component of the reference signal S _R, the reference amplitude signal S _Rr Is output. Phase demodulator 422, by phase demodulation reference signal S _R, extracts a reference phase signal S _R.theta a phase component of the reference signal S _R, and outputs a reference phase signal S _R.theta. Note that the amplitude demodulator 411 and the amplitude demodulator 421 have the same demodulation method. The phase demodulator 412 and the phase demodulator 422 are the same demodulation method. The network characteristic analyzer 430 and the network characteristic analyzer 440 analyze network characteristics based on two input signals.

次に、図３を参照する。図３は、網特性解析器４４０の内部構成を示すブロック図である。網特性解析器４４０は、位相変調部４４１と、位相変調部４４２と、網特性解析部４４３とを具備する。位相変調部４４１および位相変調部４４２は、入力される信号を再変調するためのものである。位相変調部４４１の変調方式は位相復調器４１２の復調方式と対になるものであり、位相変調部４４２の変調方式は位相復調器４２２の復調方式と対になるものである。従って、位相変調部４４１および位相変調部４４２の変調方式は、同じ変調方式である。網特性解析部４４３は、位相復調器４１２および位相復調器４２２の出力信号に基づいて網特性を解析するものである。 Reference is now made to FIG. FIG. 3 is a block diagram showing an internal configuration of the network characteristic analyzer 440. The network characteristic analyzer 440 includes a phase modulation unit 441, a phase modulation unit 442, and a network characteristic analysis unit 443. The phase modulation unit 441 and the phase modulation unit 442 are for remodulating an input signal. The modulation method of the phase modulation unit 441 is paired with the demodulation method of the phase demodulator 412, and the modulation method of the phase modulation unit 442 is paired with the demodulation method of the phase demodulator 422. Therefore, the modulation schemes of the phase modulation section 441 and the phase modulation section 442 are the same modulation scheme. The network characteristic analysis unit 443 analyzes the network characteristics based on the output signals of the phase demodulator 412 and the phase demodulator 422.

以上が、電子測定装置３００の構成に関する説明である。次に、電子測定装置３００の動作について説明する。ここで再び、図２を参照する。まず、基準信号発生器３３０は、変調信号である基準信号Ｓ_Ｒを生成する。基準信号Ｓ_Ｒは、被測定物の入力仕様に依存して生成される。例えば、基準信号Ｓ_Ｒは、被測定物２００に入力する場合、極座標変調方式や直交変調方式などにより生成される。次に、振幅／位相分解器４１０において、ＡＤＣ３１０によりアナログ・ディジタル変換された被測定信号Ｓ_Ｔから、振幅復調信号Ｓ_Ｔｒと位相復調信号Ｓ_Ｔθが生成される。一方、振幅／位相分解器４２０において、ＡＤＣ３２０によりアナログ・ディジタル変換された基準信号Ｓ_Ｒから、基準振幅信号Ｓ_Ｒｒと基準位相信号Ｓ_Ｒθが生成される。ここで、参考のために、基準振幅信号Ｓ_Ｒｒの波形例を図４Ａに、基準位相信号Ｓ_Ｒθの波形例を図４Ｂに、それぞれ示す。図４Ａおよび図４Ｂにおいて、縦軸は信号振幅を表し、横軸は時間を表す。 The above is the description regarding the configuration of the electronic measurement apparatus 300. Next, the operation of the electronic measurement apparatus 300 will be described. Reference is again made to FIG. First, the reference signal generator 330 generates a reference signal S _R is a modulation signal. Reference signal S _R is generated depending on the input specification of the object to be measured. For example, the reference signal S _R, when input to the DUT 200, is generated by such polar modulation scheme, orthogonal modulation scheme. Then, in the amplitude / phase decomposer 410, from the measured signal _{S T} which is analog-digital converted by ADC 310, the amplitude demodulated signal _{S Tr} and phase demodulation signal _{S T.theta} is generated. On the other hand, in the amplitude / phase decomposer 420, a reference amplitude signal S _Rr and a reference phase signal S _Rθ are generated from the reference signal S _R subjected to analog / digital conversion by the ADC 320. For reference, a waveform example of the reference amplitude signal S _Rr is shown in FIG. 4A and a waveform example of the reference phase signal S _Rθ is shown in FIG. 4B. 4A and 4B, the vertical axis represents signal amplitude, and the horizontal axis represents time.

再び、図２を参照する。振幅復調信号Ｓ_Ｔｒおよび対応する基準振幅信号Ｓ_Ｒｒは、網特性解析器４３０で解析される。網特性解析器４３０は、振幅復調信号Ｓ_Ｔｒおよび基準振幅信号Ｓ_Ｒｒのそれぞれの複素スペクトラムまたはパワースペクトラムを求め、得られた２つのスペクトラムを比較する。これにより、網特性解析器４３０は、極座標変調信号の振幅成分に関する、被測定物２００内の経路の網特性を解析することができる。網特性解析器４３０は、具体的には、振幅／位相分解器２１０と可変利得飽和増幅器２４３との間の網特性を解析することができる。従って、ローパスフィルタ２４２の網特性を解析することができる。また、位相復調信号Ｓ_Ｔθおよび基準位相信号Ｓ_Ｒθは、網特性解析器４４０で解析される。網特性解析器４４０は、位相復調信号Ｓ_Ｔθおよび基準位相信号Ｓ_Ｒθを個別に再変調し、再変調した位相復調信号ＭＳ_Ｔθおよび再変調した基準位相信号ＭＳ_Ｒθに基づいて網特性を解析する。網特性解析部４４３は、再変調した位相復調信号ＭＳ_Ｔθおよび再変調した基準位相信号ＭＳ_Ｒθのそれぞれの複素スペクトラムまたはパワースペクトラムを求め、得られた２つのスペクトラムを比較する。これにより、網特性解析器４４０は、極座標変調信号を生成するための位相変調に関する、被測定物２００内の経路の網特性を解析することができる。網特性解析器４３０は、具体的には、位相変調器２３０と可変利得飽和増幅器２４３との間の網特性を解析することができる。従って、バンドパスフィルタ２４１の網特性を解析することができる。なお、網特性解析器４３０および網特性解析部４４３は、上記のようなスペクトラム比較を用いる方法（周波数ドメイン法）だけでなく、特開２００４−３６１１７０号公報に記載されるようにインパルス応答を同定する方法（時間ドメイン法）により、網特性を解析するようにしても良い。 Reference is again made to FIG. The amplitude demodulated signal _STr and the corresponding reference amplitude signal _SRr are analyzed by the network characteristic analyzer 430. The network characteristic analyzer 430 obtains the complex spectrum or power spectrum of each of the amplitude demodulated signal _STr and the reference amplitude signal _SRr , and compares the two obtained spectra. Thereby, the network characteristic analyzer 430 can analyze the network characteristics of the path in the DUT 200 regarding the amplitude component of the polar modulation signal. Specifically, the network characteristic analyzer 430 can analyze the network characteristic between the amplitude / phase decomposer 210 and the variable gain saturation amplifier 243. Accordingly, the network characteristics of the low-pass filter 242 can be analyzed. Further, the phase demodulated signal _STθ and the reference phase signal _SRθ are analyzed by the network characteristic analyzer 440. The network characteristic analyzer 440 individually remodulates the phase demodulated signal S _Tθ and the reference phase signal S _Rθ , and analyzes the network characteristics based on the remodulated phase demodulated signal MS _Tθ and the remodulated reference phase signal MS _Rθ. . The network characteristic analysis unit 443 obtains respective complex spectra or power spectra of the remodulated phase demodulated signal MS _Tθ and the remodulated reference phase signal MS _Rθ , and compares the two obtained spectra. Thereby, the network characteristic analyzer 440 can analyze the network characteristics of the path in the DUT 200 regarding the phase modulation for generating the polar modulation signal. Specifically, the network characteristic analyzer 430 can analyze the network characteristic between the phase modulator 230 and the variable gain saturation amplifier 243. Therefore, the network characteristics of the bandpass filter 241 can be analyzed. The network characteristic analyzer 430 and the network characteristic analysis unit 443 identify not only the method using the spectrum comparison as described above (frequency domain method) but also the impulse response as described in JP-A-2004-361170. The network characteristics may be analyzed by a method (time domain method).

ところで、被測定信号Ｓ_Ｔと基準信号Ｓ_Ｒとの間においても時間差が生じる場合がある。この時間差は、例えば、信号発生器３３０と振幅／位相分解器２１０との間の電気長や、振幅／位相分解器の処理時間などに起因して生じる。この時間差は、網特性解析器４４０の解析結果に、周波数に比例する線形位相を与える。被測定物２００内の電気長に関する測定や補正では、この時間差を考慮する必要があるが、フィルタなどの特性を測定する場合は、無視することができよう。例えば、フィルタの網特性を解析する場合、この時間差は、周波数−振幅特性には無関係であるし、周波数−位相特性に対しては傾きを与えるにすぎない。したがって、フィルタの非線形な位相特性を十分認識することができる。 Meanwhile, there is a case where the time difference between the signal S _T and the reference signal S _R to be measured occurs. This time difference is caused by, for example, the electrical length between the signal generator 330 and the amplitude / phase decomposer 210, the processing time of the amplitude / phase decomposer, or the like. This time difference gives a linear phase proportional to the frequency to the analysis result of the network characteristic analyzer 440. In the measurement and correction related to the electrical length in the DUT 200, it is necessary to consider this time difference, but it can be ignored when measuring characteristics such as a filter. For example, when analyzing the network characteristics of a filter, this time difference is irrelevant to the frequency-amplitude characteristics and only gives a slope to the frequency-phase characteristics. Therefore, the nonlinear phase characteristic of the filter can be sufficiently recognized.

なお、網特性解析部４４３において、再変調された信号の代わりに、位相復調信号Ｓ_Ｔθおよび基準位相信号Ｓ_Ｒθを解析することができる。この場合、極座標変調信号の位相成分に関する、被測定物２００内の経路の網特性、すなわち、位相変調器２３０と振幅／位相分解器２１０との間の網特性を解析することができる。また、網特性解析器４３０において、振幅復調信号Ｓ_Ｔｒおよび基準振幅信号Ｓ _Ｒｒを個別に再変調し、再変調結果に基づいて網特性を解析することができる。この場合、極座標変調信号を生成するための振幅変調に関する、被測定物２００内の経路の網特性を解析することができる。例えば、仮に、極座標アンプ２４０において、可変利得飽和増幅器２４３の後段に回路素子が接続されていた場合、その回路素子の網特性を解析することができる。以上が第一の実施形態についての説明である。 Note that in the network analyzing unit 443, in place of the remodulated signal, it is possible to analyze the phase demodulated signal S _T.theta and the reference phase signal S _R.theta. In this case, it is possible to analyze the network characteristics of the path in the DUT 200 relating to the phase component of the polar modulation signal, that is, the network characteristics between the phase modulator 230 and the amplitude / phase decomposer 210. Further, in the network characteristic analyzer 430, can be the amplitude demodulated signal S _Tr and the reference amplitude signal S _Rr individually remodulated, analyzes the network properties on the basis of the re-modulation result. In this case, it is possible to analyze the network characteristics of the path in the DUT 200 regarding amplitude modulation for generating a polar modulation signal. For example, in the polar coordinate amplifier 240, if a circuit element is connected to the subsequent stage of the variable gain saturation amplifier 243, the network characteristics of the circuit element can be analyzed. The above is the description of the first embodiment.

ところで、第一の実施形態では、振幅成分および位相成分のそれぞれについて解析するようにしているが、振幅成分および周波数成分のそれぞれについて解析するようにしても良い。位相変調と周波数変調は、ともに角度変調とも称され、相互に変換できる性質を有するからである。位相変調から周波数変調への変換は以下の通りである。図２において、位相復調器４１２および位相復調器４２２を周波数復調器に変更すれば良い。変更の結果、被測定信号Ｓ_Ｔを周波数復調することにより周波数復調信号が得られ、基準信号Ｓ_Ｒを周波数復調することにより基準周波数信号が得られる。そして、位相成分に関する解析の代わりに、周波数復調信号と基準周波数信号とを網特性解析器で解析すると、極座標変調信号の周波数成分に関する、被測定物２００内の経路の網特性を解析することができる。 By the way, in the first embodiment, each of the amplitude component and the phase component is analyzed, but each of the amplitude component and the frequency component may be analyzed. This is because both phase modulation and frequency modulation are also called angle modulation, and have the property of being able to be converted into each other. The conversion from phase modulation to frequency modulation is as follows. In FIG. 2, the phase demodulator 412 and the phase demodulator 422 may be changed to a frequency demodulator. Result of the change, the frequency demodulated signal is obtained by frequency demodulation of the signal S _T to be measured, the reference frequency signal is obtained by frequency demodulation reference signal S _R. When the frequency demodulated signal and the reference frequency signal are analyzed by the network characteristic analyzer instead of the analysis regarding the phase component, the network characteristic of the path in the DUT 200 regarding the frequency component of the polar modulation signal can be analyzed. it can.

またさらに、第一の実施形態において、プロセッサ４００内の機能要素、例えば、振幅／位相分解器や網特性解析器は、プログラム実行により仮想的に実現される代わりに、現実のハードウェアで構成されても良い。その逆に、第一の実施形態において、基準信号発生器３３０をもプロセッサ４００内で実現するようにしても良い。 Furthermore, in the first embodiment, the functional elements in the processor 400, such as an amplitude / phase decomposer and a network characteristic analyzer, are configured by actual hardware instead of being virtually realized by executing a program. May be. Conversely, in the first embodiment, the reference signal generator 330 may also be realized in the processor 400.

また、第一の実施形態において、ＡＤＣ３１０およびＡＤＣ３２０は、直接、入力信号をアナログ・ディジタル変換するようにしているが、対応可能な周波数帯を変えるために、ＡＤＣ３１０およびＡＤＣ３２０の少なくとも一方の前段に周波数変換器を備えるようにしても良い。 In the first embodiment, the ADC 310 and the ADC 320 directly convert the input signal from analog to digital. However, in order to change the frequency band that can be handled, the ADC 310 and the ADC 320 have a frequency in front of at least one of the ADC 310 and the ADC 320. You may make it provide a converter.

さらに、第一の実施形態において、基準信号Ｓ_Ｒを電子測定装置３００の外部から供給するようにしても良い。またさらに、基準信号Ｓ_Ｒを電子測定装置３００内で発生させ、被測定物２００には外部から別の基準信号を供給しても良い。この場合、電子測定装置３００では、特開２００４−３６１１７０号公報に記載されるように、被測定信号Ｓ_Ｔを復調・変調することにより、被測定信号Ｓ_Ｔから基準信号Ｓ_Ｒを生成しても良い。 Further, in the first embodiment, the reference signal S _R may be supplied from the outside of the electronic measuring device 300. Furthermore, the reference signal S _R is generated in the electronic measuring device 300 may be supplied to another reference signal from the outside to the object to be measured 200. In this case, the electronic measuring device 300, as described in JP 2004-361170, by demodulating and modulating the signal _{S T} to be measured, and generates a reference signal _{S R} from the measured signal _{S T} Also good.

また、本発明は、次のように一般化する事ができる。ここで、図５を参照する。図５は、変調信号発生装置５００と電子測定装置６００を示す図である。電子測定装置６００は、被測定物である変調信号発生装置５００が発生する信号を測定し、変調信号発生装置５００の網特性を解析する。変調信号発生装置５００は、搬送波を生成する信号源５１０と、ｎ個の信号源（５２０−１〜ｎ）と、ｎ個の変調器（５３０−１〜ｎ）とを備える。なお、ｎは、１以上の整数である。信号源（５２０−１〜ｎ）は、関連する変調方式（Ｆ_１〜Ｆ_ｎ）と基準信号ｄとに基づき、信号Ｓ（Ｆ_１〜Ｆ_ｎ、ｄ）を発生する装置である。変調器（５３０−１〜ｎ）は、互いに干渉しない変調方式が採用される。ここで、「互いに干渉しない」とは、例えば、変調器（５３０−１）で搬送波に乗せられた信号が他の変調器（５３０−２）の影響を受けることなく、また、変調器（５３０−１）の変調方式と対になる復調方式により、信号Ｓ（Ｆ_１、ｄ）に相当する信号のみを復調することができる関係をいう。信号源５１０の出力信号ｍ_０は、変調器（５３０−１〜ｎ）に順次変調されて、電子測定装置６００へ送られる。なお、ｍ_１、ｍ_２、・・・、ｍ_ｎ−１は、それぞれ、変調器５３０−１、５３０−２、・・・、５３０−（ｎ−１）の出力信号を示す。なお、信号源（５２０−１〜ｎ）は、１〜ｎ個分の機能を果たす信号発生装置で置き換えることができる。同様に、変調器（５３０−１〜ｎ）も、１〜ｎ個分の機能を果たす変調装置で置き換えることができる。 The present invention can be generalized as follows. Reference is now made to FIG. FIG. 5 is a diagram showing a modulation signal generation device 500 and an electronic measurement device 600. The electronic measurement device 600 measures a signal generated by the modulation signal generation device 500 that is a device under test, and analyzes the network characteristics of the modulation signal generation device 500. The modulation signal generator 500 includes a signal source 510 that generates a carrier wave, n signal sources (520-1 to n), and n modulators (530-1 to n). Note that n is an integer of 1 or more. Signal source (520-1~n), based on the relevant modulation method with _(F 1 _~F _n) and the reference signal d, is a device for generating a signal _{_{S (F 1 ~F n, d}} ). Modulation methods that do not interfere with each other are used for the modulators (530-1 to n). Here, “does not interfere with each other” means that, for example, the signal carried on the carrier wave by the modulator (530-1) is not affected by the other modulator (530-2), and the modulator (530). This refers to a relationship in which only a signal corresponding to the signal S (F ₁ , d) can be demodulated by a demodulation method paired with the modulation method of -1). The output signal m ₀ of the signal source 510 is sequentially modulated by the modulators (530-1 to n) and sent to the electronic measuring device 600. Note that m ₁ , m ₂ ,..., _Mn−1 indicate output signals of the modulators 530-1, 530-2,..., 530-(n−1), respectively. Note that the signal sources (520-1 to n) can be replaced with signal generators that perform 1 to n functions. Similarly, the modulators (530-1 to n) can be replaced with modulators that perform 1 to n functions.

電子測定装置６００は、ｎ個の復調器（６１０−１〜ｎ）と、ｎ個の復調器（６２０−１〜ｎ）と、基準信号発生器６３０と、ｎ個の網特性解析器（６４０−１〜ｎ）とを備える。復調器（６１０−１〜ｎ）および復調器（６２０−１〜ｎ）のそれぞれは、変調器（５３０−１〜ｎ）のそれぞれの変調方式と対になる形式で復調を行う。図において、Ｆ_１ ^−１〜Ｆ_ｎ ^−１のそれぞれは、Ｆ_１〜Ｆ_ｎのそれぞれと対になる復調方式を表す。基準信号ｄは、変調信号であって、基準信号発生器６３０から出力される。図示しないが、基準信号発生器６３０は、基準信号ｄを供給するために、各信号源（５２０−１〜ｎ）および各復調器（６２０−２〜ｎ）とも電気的に接続されている。網特性解析器（６４０−１〜ｎ）のそれぞれは、関連する復調器（６１０−１〜ｎ）の出力信号Ｆ_１ ^−１〜Ｆ_ｎ ^−１（ｘ）および関連する復調器（６２０−１〜ｎ）の出力信号Ｆ_１ ^−１〜Ｆ_ｎ ^−１（ｄ）を参照し、時間ドメイン法または周波数ドメイン法により網特性を求め、結果を出力する。各網特性解析器（６４０−１〜ｎ）が内部で再変調を施さない場合、得られた結果は、各信号源（５２０−１〜ｎ）と変調器（５３０−１〜ｎ）との間の経路の網特性を示す。一方、各網特性解析器（６４０−１〜ｎ）が内部で再変調を施す場合、得られた結果は、各変調器（５３０−１〜ｎ）間の経路の網特性を示す。なお、本拡張形態においても、既に述べた態様変形を施せることは言うまでもない。 The electronic measurement apparatus 600 includes n demodulators (610-1 to n), n demodulators (620-1 to n), a reference signal generator 630, and n network characteristic analyzers (640). -1 to n). Each of the demodulator (610-1 to n) and the demodulator (620-1 to n) performs demodulation in a format that is paired with the modulation scheme of the modulator (530-1 to n). In the figure, each of F ₁ ^{−1 to} F _n ⁻¹ represents a demodulation method paired with each of F _{1 to} F _n . The reference signal d is a modulation signal and is output from the reference signal generator 630. Although not shown, the reference signal generator 630 is also electrically connected to each signal source (520-1 to n) and each demodulator (620-2 to n) in order to supply the reference signal d. Each of the network characteristic analyzers (640-1 to _n ) includes output signals F ₁ ^{−1 to} F _n ⁻¹ (x) of an associated demodulator (610-1 to _n ) and an associated demodulator (620-1). ˜n) with reference to the output signals F ₁ ^{−1 to} F _n ⁻¹ (d), the network characteristics are obtained by the time domain method or the frequency domain method, and the result is output. When each network characteristic analyzer (640-1 to n) does not perform remodulation internally, the obtained result is the result of each signal source (520-1 to n) and modulator (530-1 to n). The network characteristics of the route between are shown. On the other hand, when each network characteristic analyzer (640-1 to n) performs remodulation internally, the obtained result indicates the network characteristic of the path between the modulators (530-1 to n ) . In addition, it cannot be overemphasized that the aspect deformation | transformation already described can be given also in this expansion form.

極座標変調方式の概念を示すブロック図である。It is a block diagram which shows the concept of a polar coordinate modulation system. 被測定物２００と電子測定装置３００を示す図である。It is a figure which shows the to-be-measured object 200 and the electronic measuring apparatus 300. 網特性解析器４４０の内部構成を示す図である。It is a figure which shows the internal structure of the network characteristic analyzer 440. FIG. 振幅成分Ｓ_Ｒｒの波形を示す図である。It is a figure which shows the waveform of amplitude component _SRr . 位相成分Ｓ_Ｒθの波形を示す図である。It is a figure which shows the waveform of phase component _SRθ . 被測定物５００と電子測定装置６００を示す図である。It is a figure which shows the to-be-measured object 500 and the electronic measuring apparatus 600.

Explanation of symbols

１１０極座標信号発生器
１２０，２２０搬送波信号源
１３０，２３０位相変調器
１４０，２４０極座標アンプ
１４１，２４１バンドパスフィルタ
１４２，２４２ローパスフィルタ
１４３，２４３可変利得飽和増幅器
２００被測定物，信号発生装置
２１０振幅／位相分解器
２９０極座標信号発生器
３００電子測定装置
３１０，３２０アナログ・ディジタル変換器
３３０信号発生器
４００プロセッサ
４００電子測定装置
４１０，４２０振幅／位相分解器
４１１，４２１振幅復調器
４１２，４２２位相復調器
４３０，４４０網特性解析器
４４１，４４２位相変調部
４４３網特性解析部
５００変調信号発生装置
５１０搬送波信号源
５２０信号源
５３０変調器
６００電子測定装置
６１０，６２０復調器
６３０基準信号発生器
６４０網特性解析器 110 Polar signal generator 120, 220 Carrier signal source 130, 230 Phase modulator 140, 240 Polar coordinate amplifier 141, 241 Band pass filter 142, 242 Low pass filter 143, 243 Variable gain saturation amplifier 200 Device under test, signal generator 210 Amplitude / Phase resolver 290 polar signal generator 300 electronic measuring device 310,320 analog to digital converter 330 signal generator 400 processor 400 electronic measuring device 410,420 amplitude / phase decomposer 411,421 amplitude demodulator 412,422 phase demodulation Units 430 and 440 Network characteristic analyzers 441 and 442 Phase modulation unit 443 Network characteristic analysis unit 500 Modulation signal generator 510 Carrier signal source 520 Signal source 530 Modulator 600 Electronic measuring devices 610 and 620 Demodulator 630 Reference signal generator 640 Characteristics analyzer

Claims

A method for analyzing the network characteristics of an object to be measured,
Applying a reference modulation signal to the device under test;
Demodulating the output signal of the device under test with each of one or more different N demodulation methods to obtain N demodulated signals as demodulation results;
Demodulating the reference modulation signal with each of the N demodulation schemes to obtain N demodulation signals as demodulation results;
Analyzing the network characteristics of the device under test based on the demodulated signal of the output signal and the demodulated signal of the reference modulation signal based on the same demodulation method;
Only including,
The analyzing step for at least one demodulation scheme;
Based on the result of modulating the demodulated signal of the output signal with a modulation scheme that is paired with a related demodulation scheme and the result of modulating the demodulated signal of the reference modulation signal with a modulation scheme that is paired with a related demodulation scheme, A network characteristic analysis method, comprising: analyzing a network characteristic of a path related to modulation in the object to be measured .

The N demodulated signals are based on a demodulated result based on an amplitude component and a phase component of the output signal or based on an amplitude component and a phase component of the reference modulation signal. Item 2. The network characteristic analysis method according to Item 1.

A method for analyzing the network characteristics of an object to be measured,
Applying a reference modulation signal to the device under test;
Amplifying the output signal of the device under test to obtain an amplitude demodulated signal that is an amplitude component of the output signal;
Phase-demodulating the output signal to obtain a phase demodulated signal that is a phase component of the output signal;
Amplitude-demodulating the reference modulation signal to obtain a reference amplitude signal that is an amplitude component of the reference signal;
Phase-demodulating the reference modulation signal to obtain a reference phase signal that is a phase component of the reference signal;
Analyzing network characteristics of the device under test based on the amplitude demodulated signal and the reference amplitude signal;
Analyzing network characteristics of the device under test based on the phase demodulated signal and the reference phase signal;
Only including,
Analyzing the network characteristics of the device under test based on the phase demodulated signal and the reference phase signal;
Based on a result of modulating the phase demodulated signal with a phase modulation method paired with a related phase demodulation method and a result of modulating the reference phase signal with the phase modulation method, a path related to modulation in the object to be measured A method for analyzing network characteristics, characterized by analyzing network characteristics.

An apparatus for analyzing the network characteristics of an object to be measured,
Means for applying a reference modulation signal to the device under test;
Means for demodulating the output signal of the device under test with each of one or more different N demodulation schemes to obtain N demodulated signals as demodulation results;
Means for demodulating the reference modulation signal with each of the N demodulation schemes to obtain N demodulation signals as demodulation results;
Means for analyzing the network characteristics of the device under test based on the demodulated signal of the output signal and the demodulated signal of the reference modulation signal based on the same demodulation method;
Equipped with a,
The analyzing means for at least one demodulation method;
Based on the result of modulating the demodulated signal of the output signal with a modulation scheme that is paired with a related demodulation scheme and the result of modulating the demodulated signal of the reference modulation signal with a modulation scheme that is paired with a related demodulation scheme, A network characteristic analyzer for analyzing a network characteristic of a path related to modulation in the device under test .

The N demodulated signals are based on a demodulated result based on an amplitude component and a phase component of the output signal or based on an amplitude component and a phase component of the reference modulation signal. Item 5. The network characteristic analyzer according to Item 4.

An apparatus for analyzing the network characteristics of an object to be measured,
Means for applying a reference modulation signal to the device under test;
Means for demodulating the output signal of the device under test to obtain an amplitude demodulated signal that is an amplitude component of the output signal;
Means for demodulating the output signal to obtain a phase demodulated signal that is a phase component of the output signal;
Means for amplitude-demodulating the reference modulation signal to obtain a reference amplitude signal which is an amplitude component of the reference signal;
Means for phase-demodulating the reference modulation signal to obtain a reference phase signal which is a phase component of the reference signal;
Means for analyzing a network characteristic of the device under test based on the amplitude demodulated signal and the reference amplitude signal;
Means for analyzing the network characteristics of the device under test based on the phase demodulated signal and the reference phase signal;
Equipped with a,
Means for analyzing network characteristics of the device under test based on the phase demodulated signal and the reference phase signal;
Based on a result of modulating the phase demodulated signal with a phase modulation method paired with a related phase demodulation method and a result of modulating the reference phase signal with the phase modulation method, a path related to modulation in the object to be measured A network characteristic analyzing apparatus characterized by analyzing the network characteristics of a network.

A method for analyzing the network characteristics of an object to be measured,
Generating a reference modulation signal from the output signal of the device under test;
Demodulating the output signal of the device under test with each of one or more different N demodulation methods to obtain N demodulated signals as demodulation results;
Demodulating the reference modulation signal with each of the N demodulation schemes to obtain N demodulation signals as demodulation results;
Analyzing the network characteristics of the device under test based on the demodulated signal of the output signal and the demodulated signal of the reference modulation signal based on the same demodulation method;
Including
The analyzing step for at least one demodulation scheme;
Based on the result of modulating the demodulated signal of the output signal with a modulation scheme that is paired with a related demodulation scheme and the result of modulating the demodulated signal of the reference modulation signal with a modulation scheme that is paired with a related demodulation scheme, A network characteristic analysis method, comprising: analyzing a network characteristic of a path related to modulation in the object to be measured.

A method for analyzing the network characteristics of an object to be measured,
Generating a reference modulation signal from the output signal of the device under test;
Amplifying the output signal of the device under test to obtain an amplitude demodulated signal that is an amplitude component of the output signal;
Phase-demodulating the output signal to obtain a phase demodulated signal that is a phase component of the output signal;
Amplitude-demodulating the reference modulation signal to obtain a reference amplitude signal that is an amplitude component of the reference signal;
Phase-demodulating the reference modulation signal to obtain a reference phase signal that is a phase component of the reference signal;
Analyzing network characteristics of the device under test based on the amplitude demodulated signal and the reference amplitude signal;
Analyzing network characteristics of the device under test based on the phase demodulated signal and the reference phase signal;
Including
Analyzing the network characteristics of the device under test based on the phase demodulated signal and the reference phase signal;
Based on a result of modulating the phase demodulated signal with a phase modulation method paired with a related phase demodulation method and a result of modulating the reference phase signal with the phase modulation method, a path related to modulation in the object to be measured A method for analyzing network characteristics, characterized by analyzing network characteristics.

An apparatus for analyzing the network characteristics of an object to be measured,
Means for generating a reference modulation signal from the output signal of the device under test;
Means for demodulating the output signal of the device under test with each of one or more different N demodulation schemes to obtain N demodulated signals as demodulation results;
Means for demodulating the reference modulation signal with each of the N demodulation schemes to obtain N demodulation signals as demodulation results;
Means for analyzing the network characteristics of the device under test based on the demodulated signal of the output signal and the demodulated signal of the reference modulation signal based on the same demodulation method;
With
The analyzing means for at least one demodulation method;
Based on the result of modulating the demodulated signal of the output signal with a modulation scheme that is paired with a related demodulation scheme and the result of modulating the demodulated signal of the reference modulation signal with a modulation scheme that is paired with a related demodulation scheme, A network characteristic analyzer for analyzing a network characteristic of a path related to modulation in the device under test.

An apparatus for analyzing the network characteristics of an object to be measured,
Means for generating a reference modulation signal from the output signal of the device under test;
Means for demodulating the output signal of the device under test to obtain an amplitude demodulated signal that is an amplitude component of the output signal;
Means for demodulating the output signal to obtain a phase demodulated signal that is a phase component of the output signal;
Means for amplitude-demodulating the reference modulation signal to obtain a reference amplitude signal which is an amplitude component of the reference signal;
Means for phase-demodulating the reference modulation signal to obtain a reference phase signal which is a phase component of the reference signal;
Means for analyzing a network characteristic of the device under test based on the amplitude demodulated signal and the reference amplitude signal;
Means for analyzing the network characteristics of the device under test based on the phase demodulated signal and the reference phase signal;
With
Means for analyzing network characteristics of the device under test based on the phase demodulated signal and the reference phase signal;
Based on a result of modulating the phase demodulated signal with a phase modulation method paired with a related phase demodulation method and a result of modulating the reference phase signal with the phase modulation method, a path related to modulation in the object to be measured A network characteristic analyzing apparatus characterized by analyzing the network characteristics of a network.