Spectrum analysis system and control method thereof

Abstract

The invention discloses a spectrum analysis system and a control method thereof, and relates to the technical field of digital signal processing, and the system comprises a signal input port, a power distribution device, an analysis device, a control device and a plurality of signal links. Wherein the signal link comprises a signal processing module and an analog-to-digital conversion module. The signal processing module comprises filtering links of a plurality of passbands, and the signal processing module is configured to selectively switch the filtering links connected between the power distribution device and the analog-to-digital conversion module. And the analysis device is used for performing spectrum analysis on the output signal of the analog-to-digital conversion module. The control device is configured to obtain an analysis frequency band of the analysis signal; determining a target signal link and a target filtering link of each analysis frequency band based on the matching condition of the passband of the filtering link and the analysis frequency band; and controlling the corresponding signal processing module to be switched to the corresponding target filtering link so as to obtain a spectrum analysis result. The problem that the spectral analysis effect of a spectral analysis system is poor can be solved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of digital signal processing, and in particular to a spectrum analysis system and a control method thereof. Background Art

[0002] Current spectrum analysis systems typically use a single analog-to-digital converter (ADC) architecture to sample and analyze test signals during the conversion process between analog and digital signals. However, because the ADC module is limited by semiconductor process bottlenecks, when the sampling rate of the ADC module exceeds the critical point, the effective number of bits of the ADC module drops sharply, resulting in poor spectrum analysis performance of the spectrum analysis system. Summary of the Invention

[0003] In view of this, the present disclosure provides a spectrum analysis system and a control method thereof to solve the problem of poor spectrum analysis effect of the spectrum analysis system.

[0004] In a first aspect, the present disclosure provides a spectrum analysis system, the system comprising: Signal input port, used for receiving analysis signal; a power distribution device connected to the signal input port; A plurality of signal chains, each comprising a signal processing module and an analog-to-digital conversion module; the signal processing module comprising a plurality of passband filter chains, the signal processing module being configured to selectively switch the filter chains connected between the power distribution device and the analog-to-digital conversion module; an analysis device connected to the analog-to-digital conversion module, the analysis device being used to perform spectrum analysis on an output signal of the analog-to-digital conversion module; A control device is connected to the signal processing module, and the control device is configured to: respond to a selection instruction of an analysis mode for the analysis signal, determine at least one target analysis frequency band of the analysis signal; determine the target signal chain corresponding to each target analysis frequency band and the target filtering chain in the target signal chain based on the matching of the passband of the filtering chain and the target analysis frequency band; control the signal processing module of the target signal chain to switch to the corresponding target filtering chain to obtain the spectrum analysis results of the analysis signal in each target analysis frequency band.

[0005] In a second aspect, the present disclosure provides a control method for a spectrum analysis system, applicable to the above-mentioned spectrum analysis system; the method comprises: In response to a selection instruction for an analysis mode of an analysis signal, determining at least one target analysis frequency band of the analysis signal; Determining target signal links corresponding to the target analysis frequency bands and target filter links in the target signal links based on matching between the passbands of the filter links and the target analysis frequency bands; The signal processing module of the target signal chain is controlled to switch to the corresponding target filtering chain to obtain the spectrum analysis results of the analysis signal in each target analysis frequency band.

[0006] The spectrum analysis system and control method provided by the present disclosure are configured with a power distribution device and multiple signal chains. Each signal chain is configured with a signal processing module and an analog-to-digital conversion module. The signal processing module includes multiple passband filter chains, and the signal processing module is configured to selectively switch the filter chains between the power distribution device and the analog-to-digital conversion module. Therefore, when the bandwidth of the analysis signal to be analyzed is large, a target analysis frequency band for the analysis signal can be adaptively selected. The control device of the spectrum analysis system determines a target signal chain and a corresponding target filter chain for analyzing the target analysis frequency band based on the matching of the filter chain's passband with the target analysis frequency band. The target filter chain and the analog-to-digital conversion modules of the target signal chain are then used to acquire signals in the target analysis frequency band. As a result, the analog-to-digital conversion modules on each signal chain only need to acquire signals in the corresponding target analysis frequency band. Compared to acquiring signals across the entire bandwidth of the analysis signal, the instantaneous bandwidth requirement for the analog-to-digital conversion modules is lower, thereby avoiding a decrease in the effective number of bits of the analog-to-digital conversion modules and thereby improving the spectrum analysis performance of the spectrum analysis system. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the specific embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0008] Figure 1 is a structural block diagram of a spectrum analysis system according to an embodiment of the present disclosure; Figure 2 is a structural block diagram of another spectrum analysis system according to an embodiment of the present disclosure; Figure 3 is a structural block diagram of a signal processing module according to an embodiment of the present disclosure; Figure 4 is a schematic diagram of a user interface according to an embodiment of the present disclosure; Figure 5 is a flow chart of a control method of a spectrum analysis system according to an embodiment of the present disclosure; Figure 6 is a flow chart of another control method of a spectrum analysis system according to an embodiment of the present disclosure; The figure markings are as follows: 1. Signal input port; 2. Power distribution device; 3. Signal chain; 31. Signal processing module; 311. First filter; 312. Mixer; 313. Second filter; 314. First switch subunit; 315. Second switch subunit; 32. Analog-to-digital conversion module; 33. Local oscillation module; 4. Analysis device; 5. Control device; 6. Display device. DETAILED DESCRIPTION

[0009] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present disclosure.

[0010] With the rapid development of 5G millimeter-wave communications, ultra-wideband radar, and high-order modulation systems, spectrum analysis systems are facing the following irreconcilable performance contradictions: First, there's a conflict between the physical limits of instantaneous bandwidth and dynamic range. Limited by semiconductor process bottlenecks, the architecture of a single analog-to-digital converter (ADC) plummets to less than or equal to 10 bits at sampling rates exceeding 5 GS / s. This limits the ADC's dynamic range to approximately 61.96 dB, making it difficult to meet the rapidly evolving demands of spectrum analysis. For example, 5G FR2 spectrum analysis requires an ADC with an instantaneous bandwidth greater than 2 GHz, which translates to a sampling rate of at least 4 GS / s. Furthermore, the 802.11ad standard mandates harmonic suppression less than or equal to -45 dBc, meaning a dynamic range greater than 120 dB. Limited by semiconductor process bottlenecks, a single ADC often struggles to meet these requirements.

[0011] Second, there are system-level defects in scanning efficiency and measurement accuracy. Many ADC architectures in related technologies often adopt a forced continuous frequency band allocation mechanism, which requires a complete traversal of the invalid frequency band between the fundamental and harmonics. For example, in the spectrum analysis of the 2GHz fundamental and the 6GHz third harmonic, the invalid frequency band of 3-5GHz occupies 50% of the spectrum analysis time, resulting in a waste of more than 60% of the scanning resources. At the same time, the scanning delay T between the scanning channels of the fundamental and harmonic signals is delay Greater than or equal to 10ms, due to temperature drift or instantaneous signal changes, the scanning power changes of the fundamental wave and harmonics The sweep power variation of the fundamental and harmonic waves reflects the influence of factors such as time delay, temperature drift and signal transient on the signal acquisition accuracy. It can be seen that this forced continuous frequency band allocation mechanism introduces errors due to millisecond-level delay.

[0012] Third, there is a lack of flexibility and intelligent control. Users need to manually switch the spectrum analysis system to monitor discrete frequency bands. For example, when performing spectrum analysis on 2.4GHz Wi-Fi and 28GHz 5G NR, they need to manually switch the frequency band to be analyzed. This operation is complicated and easily loses the correlation of signal phases, making it difficult to support synchronous capture of non-continuous frequency bands. Moreover, the spectrum analysis system in related technologies lacks mathematically driven channel coordination, resulting in intermodulation distortion positioning accuracy greater than or equal to ±1MHz, making it difficult to meet spectrum analysis requirements such as ±100kHz testing of 5G UE transmitters.

[0013] In view of this, a spectrum analysis system is provided in this embodiment. Figure 1 The spectrum analysis system includes a signal input port 1, a power distribution device 2, and multiple signal links 3. The signal input port 1 is used to receive an analysis signal. The power distribution device 2 is connected to the signal input port 1. Specifically, the input end of the power distribution device 2 is connected to the signal input port 1, and the output end of the power distribution device 2 is connected to each signal link 3. The power distribution device 2 is used to divide the power of the received analysis signal and distribute it to the multiple signal links 3 connected thereto, and the frequency range of the analysis signal allocated to each signal link 3 is consistent.

[0014] See also Figure 2 , the signal chain 3 includes a signal processing module 31 and an analog-to-digital conversion module 32. It should be noted that, Figure 2 This is only an example of a spectrum analysis system configured with three signal chains. In actual applications, the spectrum analysis system can also be configured with two signal chains, four signal chains, etc. There is no restriction on the specific number of signal chains configured in the spectrum analysis system.

[0015] Among them, the signal processing module 31 includes a plurality of passband filter links, and the signal processing module 31 is configured to selectively switch the filter link connected to the power distribution device 2 and the analog-to-digital conversion module 32. The analog-to-digital conversion module 32 is an ADC, and the sampling rate of the analog-to-digital conversion module 32 is ±10MHz. The analog-to-digital conversion modules 32 of each signal link 3 are heterogeneously configured, that is, the working parameters of the analog-to-digital conversion modules 32 of each signal link 3 can be configured differently. For example, the resolution of the analog-to-digital conversion module 32 of the signal link 3 corresponding to the low frequency is 14 bits, and the sampling rate of the analog-to-digital conversion module 32 is 1GS / s. The resolution of the analog-to-digital conversion module 32 of the signal link 3 corresponding to the high frequency is 14 bits, and the sampling rate of the analog-to-digital conversion module 32 is 5GS / s.

[0016] The filtering link is used to shift the frequency band of the analysis signal distributed by the power distribution device 2 to the corresponding passband. Specifically, the filtering link is used to mix the analysis signal and filter the mixed signal to shift the frequency band of the analysis signal to the corresponding passband.

[0017] The spectrum analysis system of this embodiment further includes an analysis device 4. The analysis device 4 is connected to the analog-to-digital conversion module 32. Specifically, the input of the analysis device 4 is connected to the output of the analog-to-digital conversion module 32 in each signal chain 3. The analysis device 4 is configured to perform spectrum analysis on the output signals of the analog-to-digital conversion module 32 to obtain spectrum analysis results. Specifically, the analysis device 4 performs a Fast Fourier Transform (FFT) analysis on the output signals of the analog-to-digital conversion module 32 in each signal chain 3 to obtain spectrum analysis results.

[0018] The spectrum analysis system of this embodiment also includes a control device 5. The control device 5 is connected to the signal processing module 31 in each signal chain 3. The control device 5 is configured to: determine at least one target analysis frequency band for the analysis signal in response to an instruction to select an analysis mode for the analysis signal; determine the target signal chain corresponding to each target analysis frequency band and the target filtering chain within the target signal chain based on the matching between the passband of the filtering chain and the target analysis frequency band; and control the signal processing module of the target signal chain to switch to the corresponding target filtering chain to obtain the spectrum analysis results of the analysis signal in each target analysis frequency band.

[0019] The control device 5 is configured to determine the target signal link corresponding to each target analysis frequency band and the target filtering link in the target signal link based on the matching of the passband of the filtering link with the target analysis frequency band, including: the control device 5 is configured to allocate the target analysis frequency band to a corresponding number of signal links 3 in the plurality of signal links 3 according to the number of target analysis frequency bands, so as to obtain the target signal link corresponding to each target analysis frequency band. The control device 5 determines the target filtering link in the target signal link based on the matching of the target analysis frequency band with the passband of the filtering link in the corresponding target signal link.

[0020] Specifically, when there is only one target analysis frequency band, the target analysis frequency band can be allocated to the target signal links in multiple signal chains 3 according to the priority of the signal chain 3 or randomly. When there are multiple target analysis frequency bands, the target analysis frequency band can be allocated to multiple signal chains 3 in sequence according to the allocation priority of the signal chain 3. Alternatively, the target analysis frequency band can be allocated to multiple signal chains 3 in sequence according to the size of the target analysis frequency band and the order of the signal chains 3. Alternatively, based on the matching of the target analysis frequency band with the passband of the filter chain in the signal chain 3, the target analysis frequency band can be allocated to multiple signal chains 3 in sequence to determine the target signal chain corresponding to each target analysis frequency band. Alternatively, the target signal chain corresponding to each target analysis frequency band can be specified by the user. Furthermore, based on the matching of the target analysis frequency band with the passband of the filter chain in the corresponding target signal chain, the target filter chain in the target signal chain is determined.

[0021] Specifically, the control device 5 is configured to control the signal processing module 31 of the target signal link to switch to the corresponding target filtering link, including: the control device 5 is configured to control the signal processing module 31 of the target signal link to switch the connected filtering link to the corresponding target filtering link, so that the target filtering link is connected between the power distribution device 2 and the analog-to-digital conversion module 32 of the target signal link.

[0022] It should be noted that the spectrum analysis system of the present disclosure supports overlapping / non-contiguous allocation of target analysis frequency bands, and signal chain 3 is used to collect signals in the allocated target analysis frequency bands. For example, the first signal chain 3 collects signals at 2.4 GHz ± 100 MHz, and the second signal chain 3 collects signals at 28 GHz ± 500 MHz.

[0023] The spectrum analysis system provided in this embodiment is configured with a power distribution device 2 and multiple signal chains 3. Each signal chain 3 is configured with a signal processing module 31 and an analog-to-digital conversion module 32. The signal processing module 31 includes multiple passband filter chains. The signal processing module 31 is configured to selectively switch the filter chain connected between the power distribution device 2 and the analog-to-digital conversion module 32. Therefore, when the bandwidth of the analysis signal to be analyzed is large, the target analysis frequency band to be analyzed for the analysis signal can be adaptively selected. The control device 5 of the spectrum analysis system determines the target signal chain and the corresponding target filter chain for analyzing the target analysis frequency band based on the matching of the passband of the filter chain and the target analysis frequency band, thereby utilizing the target filter chain and the analog-to-digital conversion module 32 of the target signal chain to perform signal acquisition of the target analysis frequency band on the analysis signal. Therefore, the analog-to-digital conversion module 32 on each signal link 3 only needs to collect signals in the corresponding target analysis frequency band. Compared with signal collection over the entire bandwidth of the analysis signal, the instantaneous bandwidth requirement for the analog-to-digital conversion module 32 is smaller, thereby avoiding a decrease in the effective number of bits of the analog-to-digital conversion module 32, thereby improving the spectrum analysis effect of the spectrum analysis system.

[0024] In some optional embodiments, the signal chain 3 further includes a local oscillator module 33. Optionally, the local oscillator module 33 is a variable-frequency local oscillator. The frequency of the local oscillator module 33 covers the baseband to millimeter wave frequency band, supports software command to reset the signal frequency, and is a tunable local oscillator source.

[0025] Further, see Figure 3 , the filtering chain includes: a first filter 311, a mixer 312 and a second filter 313. It should be noted that, Figure 3 This is only an example of a signal processing module 31 configured with three filter chains. In actual applications, the spectrum analysis system can also be configured with two filter chains, five filter chains, etc. The specific number of filter chains configured in the signal processing module is not limited here.

[0026] The input of the first filter 311 is connected to the power distribution device 2. The input of the mixer 312 is connected to the local oscillator module 33 and the output of the first filter 311, respectively. The mixer 312 is used to mix the output signal of the local oscillator module 33 with the output signal of the first filter 311 to shift the signal frequency band of the output signal of the first filter 311 to the passband of the filtering chain. The input of the second filter 313 is connected to the output of the mixer 312. The output of the second filter 313 is connected to the analog-to-digital conversion module 32. The passband of the second filter 313 is consistent with the passband of the filtering chain.

[0027] It can be understood that the signal chain 3 is a filter array composed of multiple filters. Since each filter chain corresponds to a different passband, the center frequency and bandwidth of the signal collected by the signal chain 3 can be dynamically adjusted by switching the filter chains.

[0028] It can be understood that since the signal chains 3 are each configured with a selectively accessible filter chain, each filter chain allows different signal frequencies (i.e., passbands) to pass through, and thus the signal frequencies of the signals collected by each signal chain 3 can be dynamically adjusted according to the frequency band to be analyzed.

[0029] The spectrum analysis system provided in this embodiment is configured with a first filter 311 in each filtering chain to pre-process the analysis signal distributed by the power distribution device 2, reduce the interference signal entering the mixer 312, thereby helping to suppress the image frequency and reduce the burden of subsequent mixing. At the same time, each signal chain 3 is provided with a local oscillation module 33, which uses the local oscillation module 33 to generate a stable high-frequency signal, so that the high-frequency signal generated by the local oscillation module 33 is mixed with the analysis signal filtered by the first filter 311 in the mixer 312 to convert the analysis signal to the required frequency. In addition to the desired signal, the signal output by the mixer 312 also produces unnecessary frequency components, such as harmonics, intermodulation products, etc. Therefore, a second filter 313 is further provided in the filtering chain to filter out unnecessary mixing products, so that only the required signal is retained.

[0030] In some optional embodiments, the control device 5 is further connected to the local oscillator module 33 and the analog-to-digital conversion module 32 in each signal chain 3. The control device 5 is further configured to adjust the signal frequency of the local oscillator module 33 in the target signal chain based on the target analysis frequency band corresponding to the target signal chain. The operating parameters of the analog-to-digital conversion module 32 in the target signal chain are adjusted based on the target analysis frequency band corresponding to the target signal chain. The operating parameters include one or more of sampling rate and resolution.

[0031] Specifically, according to the mixing principle, ideally, the output signal frequency of the mixer 312 is ;in, is the output signal frequency of the mixer 312, is the frequency of the analysis signal after filtering by the first filter 311, is the output signal frequency of the local oscillation module 33.

[0032] In actual situations, the signal frequency of the local oscillation module 33 in the target signal chain can be adjusted according to the center frequency of the target analysis frequency band corresponding to the target signal chain, thereby controlling the output signal frequency of the mixer 312 in the target filter chain.

[0033] Furthermore, if the target analysis frequency band is within the preset low frequency band, the resolution of the analog-to-digital conversion module 32 in the target signal chain is adjusted to the preset resolution. If the target analysis frequency band is within the preset high frequency band, the sampling rate of the analog-to-digital conversion module 32 in the target signal chain is adjusted to the preset sampling rate.

[0034] Optionally, the preset resolution value is greater than 14 bits, and the preset sampling rate value is greater than 5 GS / s.

[0035] In the spectrum analysis system provided by this embodiment, after determining the target signal chain corresponding to the target analysis frequency band, the control device 5 automatically adjusts the signal frequency of the local oscillator module 33 in the target signal chain based on the target analysis frequency band. This ensures that the mixer 312 in the target filter chain can generate the signal in the target analysis frequency band to be analyzed. Furthermore, the operating parameters of the analog-to-digital conversion module 32 in the target signal chain are adjusted based on the target analysis frequency band, thereby enabling the analog-to-digital conversion module 32 to adapt to the collected signal in the target analysis frequency band.

[0036] In some optional implementations, the signal processing module 31 further includes a link switching unit, which is configured to switch the filter link connected between the power distribution device 2 and the analog-to-digital conversion module 32 .

[0037] Specifically, see Figure 3 The link switching unit includes a first switch subunit 314 and a second switch subunit 315. One end of the first switch subunit 314 is connected to the power distribution device 2, and the other end of the first switch subunit 314 is used to connect to the filter link, specifically to the input end of the first filter 311 in the filter link. One end of the second switch subunit 315 is connected to the analog-to-digital conversion module 32, and the other end of the second switch subunit 315 is used to connect to the filter link, specifically to the output end of the second filter 313 in the filter link.

[0038] The spectrum analysis system provided in this embodiment is provided with a link switching unit in the signal processing module 31 , so that it can automatically switch to a target filtering link adapted to the target signal frequency band according to the target signal frequency band to be analyzed by the signal link 3 .

[0039] In some optional embodiments, the spectrum analysis system further includes a display device 6, which is connected to the control device 5 and the analysis device 4 respectively. The control device 5 is configured to determine at least one target analysis frequency band for the analysis signal in response to a selection instruction for an analysis mode of the analysis signal, including: the control device 5 is configured to: control the display device 6 to display a user interface, wherein the user interface displays at least one analysis mode, wherein the at least one analysis mode includes at least one of a first analysis mode, a second analysis mode, and a third analysis mode; the first analysis mode supports customizing the analysis frequency band; the second analysis mode supports determining the analysis frequency band of at least one harmonic order of the analysis signal based on the fundamental signal parameters of the analysis signal; and the third analysis mode supports determining the analysis frequency band of the intermodulation products of the analysis signal based on the fundamental signal parameters of the analysis signal. In response to the selection instruction for at least one analysis mode, at least one target analysis frequency band corresponding to the selected analysis mode is determined.

[0040] It is understood that the first analysis mode is a custom analysis mode, which is used by the user to customize the frequency band to be analyzed. The second analysis mode is a harmonic analysis mode, which is used to analyze harmonic signals. The third analysis mode is an intermodulation product analysis mode, which is used to analyze intermodulation products.

[0041] In some optional embodiments, the control device 5 is configured to determine at least one target analysis frequency band corresponding to the selected analysis mode in response to a selection instruction for at least one analysis mode, including: the control device 5 is configured to: display the configuration item of the analysis frequency band in response to a selection instruction for the first analysis mode in at least one analysis mode; obtain at least one custom frequency band in response to the configuration operation on the configuration item to obtain at least one target analysis frequency band, and the at least one custom frequency band includes one or more of a continuous frequency band, a repeated frequency band and a non-continuous frequency band.

[0042] For example, if the user selects the first analysis mode, the control device 5 displays the configuration items of the analysis frequency band in response to the selection instruction for the first analysis mode. The user can input the frequency band to be analyzed through the configuration item, or split the signal frequency band of the analysis signal into multiple optional analysis frequency bands for the user to select. Then, at least one custom analysis frequency band is obtained, and the custom analysis frequency band is used as the target analysis frequency band. The custom analysis frequency band can be multiple discrete frequency bands, or multiple continuous frequency bands, or there can be overlapping frequency bands, which are not limited here.

[0043] The spectrum analysis system provided in this embodiment provides a first analysis mode, which enables the user to flexibly set the target analysis frequency band to be analyzed, thereby improving the flexibility of spectrum analysis.

[0044] In some optional embodiments, the control device 5 is configured to determine at least one target analysis frequency band corresponding to the selected analysis mode in response to a selection instruction for at least one analysis mode, including: the control device 5 is configured to obtain the fundamental signal parameters of the analysis signal in response to a selection instruction for the second analysis mode in at least one analysis mode, the fundamental signal parameters including the center frequency and fundamental bandwidth of the fundamental signal of the analysis signal; based on the center frequency and fundamental bandwidth of the fundamental signal, determine the analysis frequency band of the harmonic signal of at least one harmonic order of the analysis signal to obtain at least one target analysis frequency band.

[0045] Specifically, if the user selects the second analysis mode, the control device 5 obtains the center frequency and fundamental bandwidth of the fundamental signal in response to the selection instruction for the second analysis mode. The control device 5 determines the center frequency of the harmonic signal based on the center frequency of the fundamental signal and the corresponding harmonic order of the harmonic signal. The control device 5 determines the harmonic bandwidth of the harmonic signal based on the fundamental bandwidth and the corresponding harmonic order of the harmonic signal. Based on the center frequency and harmonic bandwidth of the harmonic signal, the control device 5 determines the analysis frequency band of the harmonic signal and uses the analysis frequency band of the harmonic signal as the target analysis frequency band.

[0046] It should be noted that the minimum frequency of the analysis frequency band of the harmonic signal is less than the center frequency of the harmonic signal, and the maximum frequency of the analysis frequency band of the harmonic signal is greater than the center frequency of the harmonic signal.

[0047] Specifically, the center frequency of the harmonic signal . Where k is the harmonic order, is the center frequency of the fundamental signal. The center frequency of the harmonic signal is dynamically generated, thereby replacing the original method of manually setting the center frequency of the harmonic signal. Furthermore, the control device 5 determines the target signal links corresponding to the fundamental signal and the harmonic signal respectively, as well as the target filter links adapted in the target signal links, so as to synchronously analyze the fundamental signal and the harmonic signal. According to tests, the signal acquisition delay between the target signal link for analyzing the fundamental signal and the target signal link for analyzing the harmonic signal in the spectrum analysis system disclosed in the present invention is ≤100μs, and the delay jitter is ≤1μs, which can effectively eliminate the ±1.2dB power error of continuous scanning in the related art.

[0048] Exemplarily, assume that the Y-th signal link is designated as the main path for testing the fundamental wave signal, and the frequency parameters of the fundamental wave signal are {f1, f2, f3}, where f1 is the minimum frequency of the fundamental wave signal, f2 is the center frequency of the fundamental wave signal, f3 is the maximum frequency of the fundamental wave signal, and the frequency band width occupied between f3 and f1 is the fundamental wave bandwidth. If the harmonic order that the user needs to measure is 1, and assume that the X-th signal link is designated as the slave channel, where 1 < X ≤ N, and N is the total number of signal links 3, then the control device 5 according to automatically calculates the center frequency of the first harmonic signal , so as to obtain the analysis frequency band corresponding to the X-th signal link. The control device 5 sets the signal frequency of the local oscillation module 33 of the X-th signal link according to the center frequency of the first harmonic signal, and controls the link switching unit of the X-th signal link to access the target filtering link adapted according to the analysis frequency band corresponding to the X-th signal link, so as to analyze the first harmonic signal by using the X-th signal link and obtain the analysis result. Through actual measurement, compared with the harmonic signal analysis using a single ADC architecture scan, the analysis time of the harmonic signal of the spectrum analysis system of the present disclosure can be shortened by 50%.

[0049] The spectrum analysis system provided in this embodiment provides a second analysis mode. In the second analysis mode, the control device 5 automatically calculates the analysis frequency band of the harmonic signal according to the center frequency and fundamental wave bandwidth of the fundamental wave signal of the analysis signal, so as to be used as the target analysis frequency band. Furthermore, the control device 5 can automatically select the target signal link and target filtering link for analyzing the harmonic signal according to the target analysis frequency band, so as to automatically perform synchronous analysis on the harmonic signal, effectively reducing the analysis time of the harmonic signal.

[0050] In some optional implementation manners, the control device 5 is configured to respond to a selection instruction for at least one analysis mode, and determine at least one target analysis frequency band corresponding to the selected analysis mode, including: the control device 5 is configured to respond to a selection instruction for the third analysis mode in at least one analysis mode, and obtain the fundamental wave signal parameters of the analysis signal and the position parameters of the intermodulation products, where the fundamental wave signal parameters include the center frequency and fundamental wave bandwidth of the fundamental wave signal of the analysis signal; based on the position parameters, fundamental wave bandwidth, and center frequency of the fundamental wave signal, determine the analysis frequency band for the intermodulation products, so as to obtain at least one target analysis frequency band.

[0051] Specifically, if the user selects the third analysis mode, the control device 5 responds to the selection instruction for the third analysis mode, and obtains the center frequency of the fundamental wave signal and the position parameters of the intermodulation products. The control device 5 determines the analysis frequency band of the intermodulation products based on the position parameters, fundamental wave bandwidth, and center frequency of the fundamental wave signal, so as to be used as the target analysis frequency band.

[0052] Specifically, the frequency of the intermodulation product , where m and n are the position parameters of the intermodulation product, and f min is the minimum frequency of the fundamental wave signal, and f max is the maximum frequency of the fundamental wave signal. In practical applications, the frequency range of the fundamental wave signal can be determined according to the center frequency and fundamental wave bandwidth of the fundamental wave signal. The minimum value of this frequency range is used as the minimum frequency of the fundamental wave signal, and the maximum value of this frequency range is used as the maximum frequency of the fundamental wave signal.

[0053] Exemplarily, assume that the frequency parameters of the fundamental wave signal are {f1, f2, f3}, where f1 is the minimum frequency of the fundamental wave signal, f2 is the center frequency of the fundamental wave signal, and f3 is the maximum frequency of the fundamental wave signal. Assume that the Zth signal link is specified as the slave channel for analyzing the intermodulation product, where 1 < Z ≤ N. Then, the control device 5 calculates the frequency of the intermodulation product automatically according to to obtain the analysis frequency band corresponding to the Zth signal link. The control device 5 sets the signal frequency of the local oscillator module 33 of the Zth signal link according to the frequency of the intermodulation product, and controls the link switching unit of the Zth signal link to access the corresponding target filtering link according to the analysis frequency band corresponding to the Zth signal link, so as to analyze the intermodulation product using the Zth signal link and obtain the analysis result. Through actual measurement, compared with the harmonic signal scanning analysis using a single ADC architecture, the intermodulation distortion positioning accuracy of the spectrum analysis system of the present disclosure is improved from ±1 MHz to ±100 kHz.

[0054] The spectrum analysis system provided in this embodiment provides a third analysis mode. In the third analysis mode, the control device 5 automatically calculates the analysis frequency band of the intermodulation product according to the center frequency, fundamental wave bandwidth of the fundamental wave signal of the analysis signal, and the position parameters of the intermodulation product, so as to be used as the target analysis frequency band. Furthermore, the control device 5 can automatically select the target signal link and target filtering link for analyzing the intermodulation product according to the target analysis frequency band, so as to automatically analyze the intermodulation product and effectively improve the intermodulation distortion positioning accuracy.

[0055] In some optional implementation manners, the control device 5 is further configured to determine the unanalyzed frequency band between adjacent target analysis frequency bands; the control device 5 is further used to control the display device 6 to display the spectrum analysis results of the analysis signal analyzed by the analysis device 4 in each target analysis frequency band according to the position relationship of the target analysis frequency band in the preset display frequency band, and to constrain the display area range of the unanalyzed frequency band.

[0056] ​​In actual use, control device 5 controls display device 6 to display a user interface, which includes display modules such as a menu bar, a parameter setting bar, a display area, and a display setting bar. The display area is a key display module that determines the user experience. To facilitate user switching analysis modes and observing the spectra of near-end signals such as the fundamental wave and harmonics of the analyzed signal, as well as the spectra of far-end signals, a discontinuous spectrum display function is provided, which automatically cuts off unanalyzed frequency bands other than the target analysis band. That is, when the analysis results of the target analysis band are combined and displayed, a blank segment of a preset display range is inserted in the position of the unanalyzed segment.

[0057] For example, the display device 6 is a touch screen, and the user can flexibly select the analysis mode by touching it, such as the custom analysis mode, harmonic analysis mode, and intermodulation product analysis mode. The display area automatically adjusts to display the waveform (i.e., analysis result) in the corresponding analysis mode. For example, if the fundamental signal with a center frequency of 12 GHz and a fundamental bandwidth of 1 GHz is measured, then the center frequency f of the fundamental signal is 11 =12GHz, fundamental bandwidth B 11 =1GHz, the frequency range of the fundamental signal is The center frequency of the second harmonic signal is , the bandwidth of the second harmonic signal , the frequency range of the second harmonic signal is The center frequency of the third harmonic signal , the bandwidth of the third harmonic signal , the frequency range of the third harmonic signal is .

[0058] When displaying the spectrum of the fundamental signal, second harmonic signal, and third harmonic signal in the same spectrum, the display mode in the related art will continuously display the spectrum of all signal frequency bands. The frequency range must be at least 11.5GHz to 37.5GHz. The displayed frequency range is large, and there is a long useless frequency band in the middle (i.e., the unanalyzed frequency band), which is not conducive to user observation and comparison. Based on this, the spectrum analysis system of the present disclosure will automatically cut off the useless frequency band by default. Figure 4 , Figure 4 Gap1 and Gap2 correspond to the 12.5GHz~23GHz frequency band and the 25GHz~314.5GHz frequency band respectively. Figure 4 The 12.5GHz~23GHz frequency band and the 25GHz~34.5GHz frequency band are truncated in order to constrain the display area of ​​these two frequency bands.

[0059] In addition, users can also adjust the preset display frequency band (i.e., the displayed frequency range) or the set value of the preset display frequency band by dragging the frequency band left or right as needed. If the user wants to observe the complete spectrum analysis graph, they can right-click to switch to the complete spectrum analysis graph display mode. Compared with the display mode of related technologies, it is more convenient and flexible, and can meet the diverse needs of users.

[0060] The spectrum analysis system provided in this embodiment provides an intermittent spectrum display function, which restricts the display area range of the unanalyzed frequency band, thereby facilitating observation of the analysis results of the analysis signal in the target analysis frequency band.

[0061] As mentioned above, the spectrum analysis system disclosed in the present invention is a parallel architecture of multiple analog-to-digital conversion modules. A plurality of signal chains 3 are designed in the spectrum analysis system. Each signal chain 3 includes a filter chain composed of one or more mixers 312 sharing a local oscillation module 33, and a filter group of optional channels. When a user needs to test and analyze a certain input signal, there is no need to force continuous frequency band allocation as in the multi-ADC architecture in the related art. The spectrum analysis system disclosed in the present invention allows the user to specify the spectrum of the maximum sampling bandwidth of the ADC at the center of any carrier that needs to be observed and analyzed through a control interface and a user interface, so as to obtain at least one target analysis frequency band. Among them, the frequency range that the user can specify is the maximum frequency coverage range of the spectrum analysis system.

[0062] These target analysis frequency bands can be non-continuous or can be adjusted through software linkage via the user interface. For example, if the user selects the harmonic analysis mode and specifies that the center frequency of the target analysis frequency band of the first signal chain 3 is 2 GHz, the control device 5 automatically configures the second signal chain 3 to analyze the target analysis frequency band with a center frequency of 4 GHz. If the center frequency of the first signal chain 3 is adjusted to 3 GHz, the second signal chain 3 automatically switches to the target analysis frequency band with a center frequency of 6 GHz. Therefore, it is possible to automatically skip frequency bands that are not of interest, thereby improving the efficiency of spectrum scanning.

[0063] Furthermore, in the related art, continuous scanning harmonic analysis or intermodulation analysis involves a time difference between the time the fundamental wave is scanned and the time the harmonics are scanned. During this time difference, the fundamental wave signal may have changed, and channel parameters may have also changed due to changes in the external environment such as temperature, resulting in errors in the harmonic and intermodulation analysis results. Compared to the related art, the spectrum analysis system disclosed herein can utilize multiple signal chains 3 and access selection of filter chains within the signal chains 3, and simultaneously employ multiple signal chains 3 and filter chains to analyze harmonic signals and intermodulation products, effectively improving the accuracy of harmonic and intermodulation analysis.

[0064] For ease of understanding, the overall operation process of the spectrum analysis system disclosed herein is described below: See also Figure 1 The spectrum analysis system includes multiple signal chains 3 for collecting signals. After the analysis signal enters the spectrum analysis system through the signal input port 1, the power distribution device 2 divides the input analysis signal into multiple analysis signals of equal power and inputs them into each signal chain 3. The analog-to-digital conversion module 32 on each signal chain 3 converts the collected analog signal into a digital signal that can be analyzed by the analysis device 4, allowing the analysis device 4 to obtain the required analysis data and waveform.

[0065] Take one of the signal links 3 as an example, see Figure 3 Signal chain 3 includes a signal processing module 31, an analog-to-digital conversion module 32, a local oscillator module 33, and multiple filter chains. Each filter chain includes a first filter 311, a mixer 312, a second filter 313, a first switch subunit 314, and a second switch subunit 315. The analysis signal distributed by the power distribution device 2 is a radio frequency (RF) signal. When the RF signal is switched to any filter chain via the first switch subunit 314, the control device 5 controls the shared local oscillator module 33 of this signal chain 3 to output a local oscillator signal. The RF signal passes through the first filter 311 and enters the mixer 312 for mixing with the local oscillator signal. The mixed signal is filtered by the second filter 313 and outputs the required intermediate frequency (IF) signal. The IF signal is then collected by the analog-to-digital conversion module 32 of the corresponding signal chain 3. The ADC module 32 converts the IF signal from an analog signal to a digital signal for collection and analysis by the analysis device 4. At the same time, the analysis device 4 can combine the signals collected by each signal link 3 to form a spectrum analysis graph that meets the user's needs, and output it to the display device 6 for display.

[0066] Understandably, due to the limited bandwidth of a single mixer 312, it's difficult to cover a wide frequency and spectrum range. Therefore, in the data analysis system disclosed herein, multiple signal chains 3 employ heterogeneous, selectable structures. For example, the first filter 311, mixer 312, second filter 313, intermediate frequency bandwidth (i.e., target analysis frequency band), and sampling rate of the analog-to-digital converter 32 (dynamically switchable between high-speed and low-speed sampling modes for the same analog-to-digital converter 32) selected for the first and Nth signal chains can differ. The spectrum analysis system can utilize signal chains 3 to simultaneously perform segmented frequency sweep acquisition of the input analysis signal and integrate the signals acquired by each signal chain 3. It should be noted that this integration process does not involve signal fusion; it only requires obtaining a complete spectrum analysis graph. Compared to related art spectrum analysis chain designs using a single ADC architecture that require frequency sweeping of the entire analysis signal, the present disclosure effectively improves the sampling rate of the spectrum analysis system without compromising sampling accuracy. When a user needs to analyze both the center frequency of a signal and its remote harmonics simultaneously, the spectrum analysis system of the present disclosure can separately acquire the spectrum of the frequency band containing the center frequency and the spectrum of the remote frequency band according to the user's input instructions, eliminating the need to continuously scan the intermediate frequency bands of no interest. Furthermore, when a user needs to perform multiple sampling analyses on the same signal or perform simultaneous sampling and comparison of similar frequency points, the spectrum analysis system of the present disclosure can also support this.

[0067] The architecture design of the multiple analog-to-digital conversion modules 32 adopted by the spectrum analysis system of the present invention can cover a wide frequency range from low frequency bands to millimeter wave bands, and is suitable for various application fields that require high frequency resolution and large dynamic range, such as communications, radar, wireless network monitoring, and radio frequency research and development. While broadening the real-time bandwidth of the spectrum analysis system, it can support setting the real-time bandwidth to various forms such as discontinuous, interleaved, and overlapping according to user needs within the real-time bandwidth range. For example, the first signal link is allocated a target analysis frequency band with a center frequency of 10 GHz and a real-time bandwidth of 2 GHz. The Nth signal link can be allocated a target analysis frequency band with a center frequency of 10 GHz and a real-time bandwidth of 2 GHz, or a target analysis frequency band with a center frequency of 20 GHz and a real-time bandwidth of 2 GHz, or a target analysis frequency band with a center frequency of 11 GHz and a real-time bandwidth of 1 GHz, thereby meeting the user's various analysis needs for analyzing signals.

[0068] This embodiment also provides a control method for a spectrum analysis system. This control method is applicable to the aforementioned spectrum analysis system, and is specifically used for the control device 5 in the spectrum analysis system. Details already described are omitted for clarity. It should be noted that although a logical sequence is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than shown. Figure 5 FIG. 1 is a flow chart of a control method of a spectrum analysis system according to an embodiment of the present disclosure, such as Figure 5 As shown, the process includes the following steps: Step S501 : In response to a selection instruction for an analysis mode of an analysis signal, at least one target analysis frequency band of the analysis signal is determined.

[0069] Step S502 : Based on the matching between the passband of the filtering link and the target analysis frequency band, a target signal link corresponding to each target analysis frequency band and a target filtering link in the target signal link are determined.

[0070] Step S503 : Control the signal processing module of the target signal chain to switch to the corresponding target filtering chain to obtain spectrum analysis results of the analysis signal in each target analysis frequency band.

[0071] In some optional embodiments, the control method of the present invention also includes: adjusting the signal frequency of the local oscillation module in the target signal link based on the target analysis frequency band corresponding to the target signal link; adjusting the operating parameters of the analog-to-digital conversion module in the target signal link according to the target analysis frequency band corresponding to the target signal link, the operating parameters including one or more of the sampling rate and resolution.

[0072] In some optional embodiments, the above-mentioned step S501 includes: controlling the display device to display a user interface, the user interface displays at least one analysis mode, the at least one analysis mode including at least one of a first analysis mode, a second analysis mode and a third analysis mode; the first analysis mode supports a custom analysis frequency band; the second analysis mode supports determining the analysis frequency band of a harmonic signal of at least one harmonic order of the analysis signal based on the fundamental signal parameters of the analysis signal; the third analysis mode supports determining the analysis frequency band of an intermodulation product of the analysis signal based on the fundamental signal parameters of the analysis signal; and in response to a selection instruction for at least one analysis mode, determining at least one target analysis frequency band corresponding to the selected analysis mode.

[0073] In some optional embodiments, the above-mentioned response to the selection instruction for at least one analysis mode determines at least one target analysis frequency band corresponding to the selected analysis mode, including: in response to the selection instruction for the first analysis mode in the at least one analysis mode, displaying the configuration item of the analysis frequency band; in response to the configuration operation for the configuration item, obtaining at least one custom frequency band to obtain at least one target analysis frequency band, the at least one custom frequency band including one or more of a continuous frequency band, a repeated frequency band and a non-continuous frequency band.

[0074] In some optional embodiments, the above-mentioned response to the selection instruction for at least one analysis mode, determining at least one target analysis frequency band corresponding to the selected analysis mode, includes: in response to the selection instruction for the second analysis mode in the at least one analysis mode, obtaining the fundamental signal parameters of the analysis signal, the fundamental signal parameters including the center frequency and fundamental bandwidth of the fundamental signal of the analysis signal; based on the center frequency and fundamental bandwidth of the fundamental signal, determining the analysis frequency band of the harmonic signal of at least one harmonic order of the analysis signal to obtain at least one target analysis frequency band.

[0075] In some optional embodiments, the above-mentioned response to the selection instruction for at least one analysis mode, determining at least one target analysis frequency band corresponding to the selected analysis mode, includes: in response to the selection instruction for the third analysis mode in the at least one analysis mode, obtaining the fundamental signal parameters of the analysis signal and the position parameters of the intermodulation product, the fundamental signal parameters including the center frequency and fundamental bandwidth of the fundamental signal of the analysis signal; based on the position parameters, the fundamental bandwidth and the center frequency of the fundamental signal, determining the analysis frequency band for the intermodulation product to obtain at least one target analysis frequency band.

[0076] In some optional embodiments, the control method of the present invention also includes: determining unanalyzed frequency bands between adjacent target analysis frequency bands; controlling the display device to display the spectrum analysis results of the analysis signal analyzed by the analysis device in each target analysis frequency band according to the positional relationship of the target analysis frequency bands in the preset display frequency bands, and constraining the display area range of the unanalyzed frequency bands.

[0077] Take a specific application example as an example, see Figure 6 The control method of the spectrum analysis system disclosed in the present invention mainly includes the following process: the user selects an analysis mode, for example, a custom analysis mode, a harmonic analysis mode, or an intermodulation product analysis mode, through the user interface displayed by the display device of the spectrum analysis system. Then, the control device of the spectrum analysis system determines the analysis mode selected by the user, and obtains at least one target analysis frequency band in response to the selected analysis mode. The control device determines the target signal link for analyzing the target analysis frequency band and the target filter link in the target signal link. The control device adjusts the working parameters of the analog-to-digital conversion module in the target signal link, and adjusts the signal frequency of the local oscillation module in the target signal link. The control device controls the link switching unit in the target signal link to connect to the target filter link. The analog-to-digital conversion module samples the output signal of the target filter link, and the analysis device performs spectrum analysis on the sampled signal to obtain a spectrum analysis result.

[0078] The specific implementation details and beneficial effects of the control method of the spectrum analysis system provided by the embodiment of the present disclosure can be found in the relevant description of the spectrum analysis system, which will not be elaborated here.

[0079] Although the embodiments of the present disclosure have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present disclosure, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A spectrum analysis system, characterized in that: The system comprises: Signal input port, used for receiving analysis signal; a power distribution device connected to the signal input port; A plurality of signal chains, each comprising a signal processing module and an analog-to-digital conversion module; the signal processing module comprising a plurality of passband filter chains, the signal processing module being configured to selectively switch the filter chains connected between the power distribution device and the analog-to-digital conversion module; an analysis device connected to the analog-to-digital conversion module, the analysis device being used to perform spectrum analysis on an output signal of the analog-to-digital conversion module; A control device is connected to the signal processing module, and the control device is configured to: respond to a selection instruction of an analysis mode for the analysis signal, determine at least one target analysis frequency band of the analysis signal; determine the target signal chain corresponding to each target analysis frequency band and the target filtering chain in the target signal chain based on the matching of the passband of the filtering chain and the target analysis frequency band; control the signal processing module of the target signal chain to switch to the corresponding target filtering chain to obtain the spectrum analysis results of the analysis signal in each target analysis frequency band.

2. The system according to claim 1, wherein: The signal chain also includes a local oscillation module; The filtering link includes: a first filter, wherein an input end of the first filter is used to connect to the power distribution device; a mixer, wherein an input end of the mixer is connected to an output end of the local oscillation module and the first filter respectively; A second filter, wherein the input end of the second filter is connected to the output end of the mixer, the output end of the second filter is used to connect to the analog-to-digital conversion module, and the passband of the second filter is consistent with the passband of the filtering chain.

3. The system according to claim 2, characterized in that The control device is also connected to the local oscillation module and the analog-to-digital conversion module; the control device is further configured to: adjusting the signal frequency of a local oscillator module in the target signal link based on a target analysis frequency band corresponding to the target signal link; According to the target analysis frequency band corresponding to the target signal link, operating parameters of the analog-to-digital conversion module in the target signal link are adjusted, where the operating parameters include one or more of a sampling rate and a resolution.

4. The system according to claim 1, wherein: The signal processing module further includes a link switching unit, which is used to switch the filter link connected between the power distribution device and the analog-to-digital conversion module.

5. The system according to claim 1, wherein: The system further includes a display device connected to the control device; the control device is configured to determine at least one target analysis frequency band of the analysis signal in response to a selection instruction for an analysis mode of the analysis signal, including: The control device is configured to: Controlling the display device to display a user interface, wherein the user interface displays at least one analysis mode, the at least one analysis mode including at least one of a first analysis mode, a second analysis mode, and a third analysis mode; the first analysis mode supports a custom analysis frequency band; the second analysis mode supports determining an analysis frequency band of a harmonic signal of at least one harmonic order of the analysis signal based on a fundamental signal parameter of the analysis signal; and the third analysis mode supports determining an analysis frequency band of an intermodulation product of the analysis signal based on a fundamental signal parameter of the analysis signal; In response to a selection instruction for the at least one analysis mode, at least one target analysis frequency band corresponding to the selected analysis mode is determined.

6. The system according to claim 5, characterized in that The control device is configured to, in response to a selection instruction for the at least one analysis mode, determine at least one target analysis frequency band corresponding to the selected analysis mode, including: The control device is configured to: In response to a selection instruction for a first analysis mode among the at least one analysis mode, displaying configuration items of an analysis frequency band; In response to the configuration operation for the configuration item, at least one custom frequency band is obtained to obtain the at least one target analysis frequency band, where the at least one custom frequency band includes one or more of a continuous frequency band, a repeated frequency band, and a non-continuous frequency band.

7. The system according to claim 5, characterized in that The control device is configured to, in response to a selection instruction for the at least one analysis mode, determine at least one target analysis frequency band corresponding to the selected analysis mode, including: The control device is configured to: In response to a selection instruction for a second analysis mode among the at least one analysis mode, acquiring fundamental wave signal parameters of the analysis signal, the fundamental wave signal parameters including a center frequency and a fundamental wave bandwidth of the fundamental wave signal of the analysis signal; Based on the center frequency of the fundamental wave signal and the fundamental wave bandwidth, an analysis frequency band of a harmonic signal of at least one harmonic order of the analysis signal is determined to obtain the at least one target analysis frequency band.

8. The system according to claim 5, characterized in that The control device is configured to, in response to a selection instruction for the at least one analysis mode, determine at least one target analysis frequency band corresponding to the selected analysis mode, including: The control device is configured to: In response to a selection instruction for a third analysis mode among the at least one analysis mode, acquiring fundamental signal parameters of the analysis signal and position parameters of intermodulation products, the fundamental signal parameters including a center frequency and a fundamental bandwidth of the fundamental signal of the analysis signal; An analysis frequency band for the intermodulation product is determined based on the position parameter, the fundamental bandwidth, and the center frequency of the fundamental signal to obtain the at least one target analysis frequency band.

9. The system according to claim 5, characterized in that The display device is also connected to the analysis device; the control device is further configured to: determining unanalyzed frequency bands between adjacent target analysis frequency bands; According to the positional relationship of the target analysis frequency bands in the preset display frequency bands, the display device is controlled to display the spectrum analysis results of the analysis signal analyzed by the analysis device in each target analysis frequency band, and the display area range of the unanalyzed frequency band is constrained.

10. A control method for a spectrum analysis system, characterized in that: The spectrum analysis system according to any one of claims 1 to 9 is applicable; the method comprising: In response to a selection instruction for an analysis mode of an analysis signal, determining at least one target analysis frequency band of the analysis signal; Determining target signal links corresponding to the target analysis frequency bands and target filter links in the target signal links based on matching between the passbands of the filter links and the target analysis frequency bands; The signal processing module of the target signal chain is controlled to switch to the corresponding target filtering chain to obtain the spectrum analysis results of the analysis signal in each target analysis frequency band.

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