KR100962404B1 - Signal strength measuring device and method - Google Patents

Abstract

The present invention relates to an apparatus for measuring signal strength, and specifically, a signal strength measurement dynamic range in which a difference between two signal strengths output from a device under test (DUT) can be measured by an automatic test equipment (ATE). The present invention relates to a signal strength measuring apparatus and method for measuring the signal strength of an inspector even when the dynamic range is greater than the dynamic range. To this end, the present invention is located between the automatic tester and the inspector, a signal converter for converting the measurement response signal of the inspector into a measurement response conversion signal, and generates a conversion request signal required for converting the measurement response conversion signal, the measurement It provides a signal strength measuring device and a signal strength measuring method using the same, characterized in that it comprises an automatic tester for receiving the response conversion signal to verify the performance of the inspected.

Auto Inspector, Inspector, Signal Converter

Description

Signal strength measuring apparatus and method {APPARATUS AND METHOD FOR MEASURING SIGNAL POWER}

The present invention relates to an apparatus and a method for measuring signal strength. Specifically, even when a difference between two signal strengths output from an inspector is greater than a signal intensity measurement dynamic range that can be measured by an automatic inspector, the signal strength of the inspector is measured and measured. A signal strength measuring apparatus and method for verifying the performance of a tester.

In general, integrated circuits (ICs) need to be tested to ensure proper operation. This is particularly required during the development and manufacturing stages of ICs, which are typically inspected prior to final application. During testing, ICs such as inspectors, such as RF chips, are exposed to various types of stimulus signals, and the response is measured and processed to compare with the expected response of a good device. Automated checkers generally perform their work according to a device-specific inspection program.

Here, the case where there are two measurement response signals is demonstrated as an example.

1A is a block diagram illustrating a conventional signal strength measuring apparatus.

As shown in FIG. 1A, the conventional signal strength measuring apparatus receives the measurement response signals f1 and f2 of the inspected object 30 and mixes the low frequency converted signal fo to mix the low frequency signals f1 -fo and f2-2. signal strength measurement dynamic range to measure the mixer 11 for converting to fo, the signal generator 17 for generating a low frequency converted signal fo, and the mixed low frequency signals f1-fo and f2-fo Analog to Digital Converter (ADC) 13 and a Digital Signal Processor (DSP) for processing the signal strength measurement value recognized by the analog digital converter and outputting the final signal strength measurement result. The automatic inspector 10 including 15 and the inspector 30 whose performance is verified by measuring the measurement response signals f1 and f2 are constituted.

The automatic inspector 10 generates a low frequency converted signal fo for converting the measurement response signals f1 and f2 of the inspected object into a low frequency signal through the signal generator 17 and sends the signal to the mixer 11. 11) mixes the measurement response signals f1 and f2 and the low frequency converted signal fo to produce the low frequency signals f1-fo and f2-fo. The low frequency signals f1-fo and f2-fo are input to the analog-to-digital converter 13 and recognized as signal strength within the signal strength measurement dynamic range of the analog-to-digital converter 13 and processed by the digital signal processor 15. It is then output as a result of the measurement response signal strength.

Figure 1b is an exemplary view for explaining the measurement response signal strength in the conventional signal strength measuring apparatus.

As shown in Figure 1b, the signal strength of the measurement response signal (f1, f2) of the inspector 30 input to the automatic tester 10 in the conventional signal strength measuring device is shown through a frequency analyzer.

Figure 1c is an exemplary view for explaining the measurement response signal strength in the conventional signal strength measuring apparatus.

As shown in Figure 1c, the intensity of the measurement response mixed signal (f1-fo, f2-fo) output from the mixer of the automatic tester 10 in the conventional signal strength measurement device was shown through the frequency analyzer, the measurement response It can be seen that among the mixed signals, f1-fo is within the signal strength measurement dynamic range of the analog-to-digital converter, and f2-fo is not within the dynamic range.

However, in the conventional signal strength measuring apparatus, the signal intensity measurement dynamic range of the analog-to-digital converter is shown in FIG. If larger, there is a problem in that the intensity of the measurement response signals f1 and f2 of the inspector cannot be simultaneously measured.

The present invention has been made in view of the above problems, and when two or more output signals are input from the inspector, even if the difference in the output signal strength is greater than the signal intensity measurement dynamic range that can be measured by the inspector, It is an object of the present invention to provide a signal strength measuring apparatus and method for measuring the output signal strength of the inspector to verify the performance of the inspector.

Another object of the present invention is to provide a signal strength measuring apparatus and method for measuring the performance of an inspector by controlling the dynamic range of the signal strength measurement in the auto inspector for a plurality of output signals of the inspector according to each signal. The purpose is to provide.

Another object of the present invention is to receive a plurality of output signals of the inspector one by one in the automatic tester signal strength measuring apparatus for varying the output signal of the inspector to adjust the measurement dynamic range according to each input signal strength and The purpose is to provide a method.

Signal strength measuring apparatus according to an aspect of the present invention for achieving the above object is an operation of generating a conversion request signal to verify the performance of the inspector through a plurality of measurement response signals received from the inspected object to be measured An automatic inspector which repeats and verifies the performance of the inspector; And a signal converter positioned between the automatic tester and the test target, and configured to sequentially convert a plurality of measurement response signals of the test target into a measurement response conversion signal and output the signal. It is characterized by.

In addition, the signal strength measurement method according to another aspect of the present invention for achieving the above object is to repeatedly measure the intensity of the plurality of measurement response signals of the inspector according to the type of inspector to verify the performance A signal strength measuring method of a device for measuring a signal strength comprising a signal converter for sequentially converting the plurality of measurement response signals into a measurement response conversion signal, wherein the plurality of measurement response signals are sequentially converted into the measurement response conversion signal A conversion request signal generating step of generating a conversion request signal required for conversion into a signal; A signal modulating step of receiving and modulating the plurality of measurement response signals and sequentially transmitting the measurement response conversion signals to the automatic tester; And a signal strength measuring step of receiving a plurality of the measurement response conversion signals and repeatedly measuring the strength of the measurement response conversion signal.

According to the above-mentioned problem solving means, when the signal strength measuring device is used, the automatic tester can convert the output signal of the inspector to measure the output signal strength of the inspector, thereby verifying the performance of the inspector. .

In addition, when a plurality of signals are output from the inspector, even if the difference in the intensity of the output signals is greater than the dynamic range of the signal strength measurement that can be measured by the automatic inspector, the converted signal is input one by one and the signal is matched with each input signal. Intensity Measurement By measuring the dynamic signal output signal strength by adjusting the dynamic range, the performance of the inspector can be verified.

In the signal strength measuring apparatus and method of the present invention, when verifying the performance of the inspector, when two or more measurement response signals required for verifying the performance of the inspector are input to the automatic inspector, the difference in the intensity of the input signal is measured by the automatic inspector. Even if it is greater than the possible signal strength measurement dynamic range, there is a technical gist to verify the performance of the inspector. This is to solve the problem that the automatic tester cannot measure the response signal having the difference in signal strength greater than the dynamic range of the signal strength measurement dynamic range. The automatic tester adjusts the dynamic range of the signal strength measurement of the automatic tester according to the input signal strength one by one to measure the signal strength of the response signal to verify the performance of the test subject.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings, with reference to the parts necessary for understanding the operation and operation according to the present invention.

In the following description, the signal strength measuring apparatus of the present invention and specific details of the present invention are shown to provide a more general understanding of the present invention. Without these specific details, the present invention can be easily implemented by modification thereof. It will be apparent to those of ordinary skill in the art.

On the other hand throughout the present specification, the measurement response signal will be used immediately means a signal output from the inspector. In addition, the measurement response mixed signal will be used immediately, which means a signal in which the measurement response signal is output through the mixer. In addition, the measurement response conversion signal will be immediately used to mean a signal that the measurement response mixed signal is output through a predetermined band pass filter. The conversion request signal will also be used immediately to mean a signal necessary for converting the measurement response signal to match the center frequency of the band pass filter. In addition, the measurement result of the response signal strength will be used immediately, which means the result of the performance verification of the inspected object measured by the automatic inspector. Also, the band filter center frequency will be used immediately to mean the center frequency of a predetermined band filter.

In addition, although the signal strength measuring apparatus and method of the present invention can be used when there are more than one measurement response signals output from the inspected object, the case of two will be described as an example to help understanding of the present invention.

2 is a block diagram for explaining a signal strength measuring apparatus of the present invention.

As shown in FIG. 2, the signal measuring apparatus of the present invention includes an automatic inspector 100, an inspector 200, and a signal converter 300.

First, the inspector 200 may output two or more measurement response signals having a difference f1-f2 between the intensity of the response response signals f1 and f2 greater than the measurement dynamic range of the signal intensity that can be measured by the automatic inspector 100. You can print Here, the inspector 200 is a device having a built-in transmission and reception function. For example, it may be an RF chip for transmitting and receiving radio frequency (RF) signals.

The signal converter 300 is located between the automatic tester 100 and the test target 200, and converts the measurement response signals f1 and f2 to output the automatic tester. The signal converter 300 receives the conversion request signal fc generated by the automatic tester 100 and converts the measurement response signals f1 and f2 to match the center frequency of the predetermined band (f1-fc, f2-fc). Do it. When the converted signal is output to the automatic tester 100 through a predetermined band, when f1-fc and f2-fc pass through the predetermined band when f1-fc coincides with the center frequency of the predetermined band, f2-fc becomes If f1-fc and f2-fc pass through the predetermined band when it is filtered and the measurement response conversion signal f1-fc is output to the automatic checker 100, and f2-fc coincides with the center frequency of the predetermined band, f1 -fc is filtered and the measurement response conversion signal f2-fc is output to the automatic checker 100.

The automatic inspector 100 generates a conversion request signal fc and outputs it to the signal converter 300 to convert the measurement response signals f1 and f2 into signals corresponding to the center frequencies of the predetermined bands. First, in order to convert f1 to match the center frequency of a predetermined band among the measurement response signals, a conversion request signal fc is generated and output to the signal converter 300 such that f1-fc becomes the center frequency of the predetermined band. . When f2 is to be converted to match the center frequency of the predetermined band, a conversion request signal fc is generated and output to the signal converter 300 such that f2-fc is the center frequency of the predetermined band. When the measurement response conversion signal output from the signal converter 300 is f1-fc, the automatic tester 100 adjusts the signal strength measurement dynamic range to a range in which the measurement response conversion signal f1-fc is measured. After measuring the strength and outputs the measurement result of the measurement response signal strength, and when the measurement response conversion signal output from the signal converter 300 is f2-fc, the automatic tester 100 measures the signal strength measurement dynamic range measurement response After measuring the signal strength by adjusting the conversion signal (f2-fc) to the range that can be measured, and outputs the measurement result of the measurement response signal strength.

3A is a block diagram showing the internal configuration of a signal converter of the signal strength measuring apparatus in FIG.

As shown in FIG. 3A, the signal converter 300 of the present invention includes a mixer 310 and a band filter 330.

First, the mixer 310 mixes the measurement response signals f1 and f2 of the inspector 200 and the conversion request signal fc received from the automatic inspector 100 to measure the measurement response mixed signals f1-fc and f2-fc. ) In this case, when the conversion request signal fc is a signal necessary for converting f1 to match the center frequency of the bandpass filter 330 among the measurement response signals, f1-fc becomes the bandpass filter center frequency fb and f2 is a bandpass filter. If the signal is required to be converted to match the center frequency of 330, f2-fc becomes the band filter center frequency fb. When f1-fc of the measurement response mixed signals f1-fc and f2-fc matches the band filter center frequency fb, the measurement response mixed signals f1-fc and f2-fc are the band filters 330. When f2-fc is passed by the filter, the measurement response conversion signal f1-fc is output to the automatic tester 100. When f2-fc coincides with the band filter center frequency fb, the measurement response mixed signal ( When f1-fc and f2-fc pass through the band pass filter 330, f1-fc is filtered by the filter, and f2-fc, which is a measurement response conversion signal, is output to the automatic tester 100.

3B is an exemplary diagram for describing the strength of the measurement response signal input to the signal converter.

As shown in Figure 3b, the signal strength of the measurement response signal (f1, f2) input to the signal converter 300 is shown through a frequency analyzer. When the conversion request signal fc is a signal required for matching f1 with the center frequency fb of the band pass filter 330 among the measurement response signals f1 and f2, the conversion request signal fc becomes f1-fb.

3C is an exemplary diagram for explaining the strength of the measurement response mixed signal output from the mixer of the signal converter.

As shown in Figure 3c, the signal strength of the measurement response mixed signal (f1-fc, f2-fc) output from the mixer 310 of the signal converter 300 is shown through a frequency analyzer.

3D is an exemplary diagram for describing the strength of the measurement response conversion signal output from the band pass filter of the signal converter.

As shown in FIG. 3D, when f1-fc coincides with the center frequency fb of the band filter 330 among the measurement response mixed signals f1-fc and f2-fc, the band filter 330 outputs the band filter 330. The signal strength of the measured response conversion signal f1-fc is shown through a frequency analyzer.

3E is an exemplary diagram for describing the strength of the measurement response signal input to the signal converter.

As shown in FIG. 3E, the signal strengths of the measurement response signals f1 and f2 input to the signal converter 300 are shown through a frequency analyzer. When the conversion request signal fc is a signal required for matching f2 with the center frequency fb of the bandpass filter 330 among the measurement response signals f1 and f2, the conversion request signal fc becomes f2-fb.

3F is an exemplary diagram for explaining the strength of the measurement response mixed signal output from the mixer of the signal converter.

As shown in Figure 3f, the signal strength of the measurement response mixed signal (f1-fc, f2-fc) output from the mixer 310 of the signal converter 300 is shown through a frequency analyzer.

3G is an exemplary diagram for describing the strength of the measurement response conversion signal output from the band pass filter of the signal converter.

As shown in FIG. 3G, when f2-fc of the measurement response mixed signals f1-fc and f2-fc coincides with the center frequency fb of the band filter 330, the band filter 330 outputs the band filter 330. The signal strength of the measured response conversion signal f2-fc is shown through a frequency analyzer.

Figure 4a is a configuration diagram showing the internal configuration of the automatic tester of the signal strength measuring apparatus in FIG.

As shown in FIG. 4A, the automatic tester 100 of the present invention includes a signal strength measuring unit 110, a conversion request signal generating unit 130, and a control unit 150.

First, the signal strength measuring unit 110 includes an analog to digital converter 111 and a digital signal processor 113. The analog-to-digital converter 110 receives the measurement response conversion signal f1-fc or f2-fc and measures the signal strength of the measurement response conversion signal f1-fc or f2-fc. The intensity of the input signal is recognized by adjusting the signal strength measurement dynamic range of the signal to the response response conversion signal f1-fc or f2-fc. When the recognized value is output to the digital signal processor 113, the digital signal processor 113 receives and processes the value and outputs the measurement result of the measurement response signal strength.

The conversion request signal generation unit 130 is to receive the measurement response conversion signal f1-fc or f2-fc of the measurement response signals f1 and f2 of the inspector 200 from the signal strength measurement unit 110. The conversion request signal fc is generated so that the center frequency of the signal coincides with the center frequency of the band pass filter 330 of the signal converter 300. To make the measurement response conversion signal be f1-fc, generate a conversion request signal fc such that f1-fc coincides with the center frequency of the bandpass filter 330 of the signal converter 300, and the measurement response conversion signal is f2. In order to be -fc, a conversion request signal fc is generated such that f2-fc coincides with the center frequency of the bandpass filter 330 of the signal converter 300.

The controller 150 checks how many measurement response signals are output from the inspector 200, and when there are two or more measurement response signals, the control unit 150 may measure each of the measurement response signals and the signal strength measurement unit 110. The conversion request signal generation unit 130 is controlled. When the intensity difference f1-f2 of the measurement response signals f1 and f2 is greater than the signal intensity measurement dynamic range that can be measured by the signal strength measurement unit 110, simultaneously measuring the measurement response signals f1 and f2 Since it is impossible, the conversion request signal necessary for converting the measurement response signals f1 and f2 into the measurement response conversion signals f1-fc or f2-fc in order to convert the measurement response signals f1 and f2 to measure the signal strength. The signal strength measurement dynamic of the analog-to-digital converter 111 is controlled to control the conversion request signal generation unit 130 to generate (fc) and to measure the input measurement conversion request signal f1-fc or f2-fc. The signal strength measuring unit 110 is controlled to adjust the range.

4B is an exemplary diagram for describing the strength of the measurement response conversion signal input to the automatic tester 100.

As shown in FIG. 4B, when the measurement response conversion signal input to the automatic tester 300 is f1-fc, the signal strength of the measurement response conversion signal is shown through a frequency analyzer. It can be seen that the signal strength measurement dynamic range of the analog-to-digital converter 111 is adjusted according to the measurement response conversion signal f1-fc. Measurement result of the measurement response signal strength can be measured.

4C is an exemplary diagram for describing the strength of the measurement response conversion signal input to the automatic tester 100.

As shown in FIG. 4C, when the measurement response conversion signal input to the automatic tester 300 is f2-fc, the signal strength of the measurement response conversion signal is shown through a frequency analyzer. It can be seen that the signal strength measurement dynamic range of the analog-to-digital converter 111 is adjusted according to the measurement response conversion signal f2-fc. Measurement result of the measurement response signal strength can be measured.

5 is a flowchart illustrating a signal strength measuring method of the present invention.

As shown in FIG. 5, the inspector 200 outputs a measurement response signal (S501).

The controller 150 of the automatic tester 100 determines whether there are two or more measurement response signals (S503).

As a result of determination, when there are two or more measurement response signals, the control unit 150 of the automatic tester 100 determines that the difference between the two measurement response signal strengths of the analog-to-digital converter 111 of the signal strength measurement unit 110 of the automatic tester 100 is different. It is determined whether the signal strength measurement is greater than the dynamic range (S505).

 As a result of determination, when the difference between the two measurement response signal strength is large, the automatic tester such that the center frequency of the signal to measure the signal strength of the measurement response signal to match the center frequency of the band filter 330 of the signal converter 300, In operation S507, the conversion request signal generation unit 130 generates a conversion request signal. The mixer 310 of the signal converter 300 mixes two measurement response signals and a conversion request signal to produce two measurement response mixed signals (S509). The control unit 150 of the automatic tester 100 determines whether there is a signal in which the frequency coinciding with the center frequency of the bandpass filter 330 is identical among the two measurement response mixed signals (S511).

As a result of the determination, when a signal coinciding with the center frequency of the bandpass filter 330 is present in the two measurement response mixed signals, the signal is matched with the center frequency of the bandpass filter 330 among the two measurement response mixed signals. Pass the signal, and the signal does not match (S513). In order to measure the strength of the signal passing through the band pass filter 330, the controller 150 of the automatic tester 100 adjusts the dynamic range of the signal strength measurement of the analog-to-digital converter 111 of the signal strength measurement unit 110. (S515). When the dynamic range is adjusted, the signal strength measuring unit 110 measures the strength of the signal passing through the band pass filter (S517).

However, as a result of the determination in step 511 (S511), when there is no signal matching the center frequency of the bandpass filter 330 among the two measurement response mixed signals, the center frequency of the signal to measure the signal strength among the measurement response signals is The conversion request signal is generated to match the center frequency of the band pass filter 330 (S507).

As a result of the determination in step 503 (S503), when the measurement response signal is not two or more, the signal of the analog-to-digital converter 111 so that the intensity of the new measurement response signal of the control unit 150 of the automatic tester 100 can be measured. The intensity measurement dynamic range is adjusted (S515). The signal strength measuring unit 110 of the automatic tester 100 measures the signal strength (S517).

As a result of determining in step 505 (S505), when the signal strength difference between the two measurement response signal is smaller than the dynamic range of the analog-to-digital converter 111 signal strength measurement of the automatic tester 100, the signal strength measurement of the automatic tester 100 immediately The unit 110 measures the signal strength (S517).

The controller 150 of the automatic tester 100 determines whether a measurement response signal to be measured remains (S519).

As a result of the determination, if there is no measurement response signal to be measured, the signal strength measurement is finished.

However, when it is determined in step 519 that the measurement response signal to be measured remains, the center frequency of the measurement response mixed signal that has not yet been measured among the two measurement response mixed signals remains at the center of the band filter 330. A conversion request signal is generated to match the frequency (S507).

Figure 1a is a block diagram for explaining a conventional signal strength measuring device.

Figure 1b is an exemplary view for explaining the measurement response signal strength in the conventional signal strength measuring device.

Figure 2 is a block diagram for explaining the signal strength measuring apparatus of the present invention.

3A is a configuration diagram showing an internal configuration of a signal converter in FIG.

Figure 3b is an exemplary diagram for explaining the strength of the measurement response signal input to the signal converter.

Figure 3c is an exemplary view for explaining the measurement response signal strength output from the mixer of the signal converter.

3D is an exemplary view for explaining the strength of the measurement response conversion signal output from the band pass filter of the signal converter.

3E is an exemplary diagram for explaining the strength of the measurement response signal input to the signal converter.

Figure 3f is an exemplary diagram for explaining the strength of the measurement response mixed signal output from the mixer of the signal converter.

3G is an exemplary diagram for explaining the strength of the measurement response conversion signal output from the band pass filter of the signal converter.

Figure 4a is a configuration diagram showing the internal configuration of the automatic inspection machine in Figure 2;

4B and 4C are exemplary views for explaining the strength of the measurement response conversion signal input to the automatic tester.

5 is a flow chart showing a signal strength measuring method of the present invention.

*** Explanation of symbols for main parts of drawing ***

100: automatic tester 200: tester

300: signal converter 110: signal strength measuring unit

111: analog to digital converter 113: digital signal processor

130: conversion request signal generation unit 150: control unit

310: mixer 330: band filter

Claims (13)

In the signal strength measuring apparatus comprising an automatic inspector for verifying the performance of the inspector, and a signal converter located between the automatic inspector and the inspector, When the difference between the strengths of the plurality of measurement response signals output from the inspector is greater than the signal intensity measurement dynamic range that can be measured by the automatic inspector, a conversion request signal is transmitted, and the inspector is converted based on the converted measurement response signal. An automatic checker for verifying the performance of the; And a signal converter which receives the conversion request signal from the automatic tester, converts the plurality of measurement response signals of the inspected device into a signal strength measurement dynamic range, and outputs the converted signal to the automatic tester. The method of claim 1, wherein the automatic checker, A conversion request signal generator for generating the conversion request signal; A signal strength measuring unit measuring the strength of the measurement response conversion signal; A control unit for controlling the conversion request signal generation unit and the signal strength measurement unit, and controls the overall operation according to the performance verification of the inspector Signal strength measuring apparatus comprising a. The method of claim 2, wherein the conversion request signal generation unit, When the difference in the measurement response signal strength is greater than the signal intensity measurement dynamic range that can be measured by the signal strength measurement unit, one of the measurement response signals to be measured to match the center frequency of a predetermined band A signal strength measuring device for generating a conversion request signal required for conversion. The method of claim 2, wherein the signal strength measuring unit, An analog-digital converter configured to receive the measurement response conversion signal and vary a signal strength measurement dynamic range in a range in which the strength of the measurement response conversion signal can be measured; Digital signal processor that measures the measurement response signal in the dynamic range of the variable analog-to-digital converter and outputs the measurement result of the response signal strength. Signal strength measuring apparatus comprising a. The method of claim 2, wherein the control unit, According to the strength of the measurement response conversion signal, the signal strength measurement unit to control the signal strength measurement unit to vary the dynamic range of the signal strength measurement unit to a range that can measure the strength of the measurement response conversion signal, characterized in that Signal strength measuring device. The method of claim 2, wherein the control unit, And control the conversion request signal generation unit to generate the conversion request signal required to convert the measurement response signal so that the center frequency of the measurement response signal coincides with the center frequency of a predetermined band to pass. Signal strength measuring device. The method of claim 1, wherein the signal converter, A mixer for mixing the measurement response signal and the conversion request signal to produce a measurement response mixed signal; A filter that filters the measurement response mixed signal and outputs the measurement response conversion signal Signal strength measuring apparatus comprising a. The method of claim 7, wherein the filter, And a measurement response signal for outputting the measurement response conversion signal by passing a signal corresponding to the center frequency of a predetermined band among the measurement response mixed signals. A signal converter that converts the plurality of measurement response signals into measurement response conversion signals sequentially so that the strength of the plurality of measurement response signals of the inspector can be repeatedly measured by an automatic inspector according to the type of inspector to verify the performance. In the signal strength measurement method of the device for measuring the signal strength consisting of, A conversion request signal generating step of generating a conversion request signal necessary for converting the plurality of measurement response signals into the measurement response conversion signal sequentially; A signal modulating step of receiving and modulating the plurality of measurement response signals and sequentially transmitting the measurement response conversion signals to the automatic tester; A signal strength measuring step of receiving a plurality of the measurement response conversion signal and repeating the strength measurement of the measurement response conversion signal Signal strength measurement method comprising a. The method of claim 9, wherein the conversion request signal generation step, Generating a conversion request signal necessary for converting one of the measurement response signals to be measured to be consistent with the center frequency of a predetermined band so that the intensity of the measurement response signal can be measured by the automatic tester; Signal strength measuring method, characterized in that. The method of claim 9, wherein the signal modulation step, A mixing step of mixing the measurement response signal and the conversion request signal to generate a measurement response mixed signal; A filtering step of transmitting the measurement response conversion signal by filtering the measurement response mixed signal Signal strength measurement method comprising a. The method of claim 11, wherein the filtering step, And a measurement response mixed signal for transmitting the measurement response conversion signal by passing a signal corresponding to the center frequency of a predetermined band among the measurement response mixed signals. 10. The method of claim 9, wherein the signal strength measurement step, An analog-digital conversion step of receiving a measurement response conversion signal and varying a signal strength measurement dynamic range to a range in which the strength of the measurement response conversion signal can be measured; Digital signal processing step of measuring the measurement response signal in the dynamic range of the variable analog-to-digital converter and transmitting the measurement result of the measurement response signal strength Signal strength measurement method comprising a.

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