Spectrum analyzer cross-band scanning method

Abstract

The invention discloses a spectrum analyzer cross-band scanning method, and belongs to the technical field of spectrum analyzers. A frequency spectrograph cross-band scanning method comprises the following steps: firstly, according to a starting frequency fs and an ending frequency fT set by a user, calculating a frequency sweeping width Span; then, frequency spectrograph scanning is designed on the basis of two principles that Span is smaller than or equal to 100 MHz, no cross-band scanning is conducted, and cross-band frequency points f1 and f2 can be adjusted within the frequency range of + / -50 MHz; the frequency spectrograph does not need to carry out cross-band scanning when the frequency sweeping width Span is smaller than or equal to 100 MHz, cross-band frequency points can be adjusted within the frequency range of + / -50 MHz, the cross-band scanning state is obviously reduced compared with the fixed cross-band frequency, and the measurement speed and efficiency of the frequency spectrograph are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of spectrum analyzers, and in particular relates to a spectrum analyzer cross-band scanning method. Background Art

[0002] A spectrum analyzer is an instrument that studies the spectrum structure of electrical signals. It can measure the frequency, amplitude, distortion and other related parameters of unknown signals. It usually has a wide frequency and amplitude measurement range. It is mainly used in wireless communications, electronic product research and development and production, maintenance and testing of electronic countermeasure equipment, etc. Spectrum analyzers can also be called frequency domain oscilloscopes, tracking oscilloscopes, analytical oscilloscopes, harmonic analyzers, frequency characteristics analyzers or Fourier analyzers. The main technical indicators of spectrum analyzers include frequency range, resolution, sweep speed, sensitivity, false response, amplitude accuracy, etc.

[0003] The frequency measurement range of a spectrum analyzer can generally range from a few kilohertz to several gigahertz / tens of gigahertz. The entire measurement frequency range is divided into multiple bands for down-conversion reception, so the spectrum analyzer scans single-band scans and cross-band scans. In general, the cross-band frequency point of the spectrum analyzer is fixed, so as long as the starting frequency f s and the stop frequency f T In different bands, the spectrum analyzer needs to perform cross-band scanning; and with the same "sweep width", single-band scanning is faster and more efficient than cross-band scanning. Summary of the invention

[0004] In view of the deficiencies in the prior art, an object of the present invention is to provide a cross-band scanning method for a spectrum analyzer, which solves the problems in the prior art.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A spectrum analyzer cross-band scanning method, wherein the RF input frequency of the spectrum analyzer is 9kHz to 6GHz, which is divided into three bands for scanning, and the frequency ranges of the three bands are:

[0007] B0: 9kHz≤RF≤f1

[0008] B1: f1 <RF≤f2

[0009] B2: f2 <RF≤6GHz

[0010] Among them, f1 and f2 are cross-band frequency points;

[0011] The cross-band scanning method of the spectrum analyzer comprises the following steps:

[0012] According to the starting frequency f set by the user s and the stop frequency f T, calculate the sweep width Span;

[0013] When the sweep width Span ≤ 100 MHz, the scanning mode is: if f T ≤ f1 + 50 MHz, the spectrum analyzer scans in the B0 band; if f1 + 50 MHz < f T ≤ f2 + 50 MHz, the spectrum analyzer scans in the B1 band; if f2 + 50 MHz < f T , the spectrum analyzer scans in the B2 band;

[0014] When the sweep width Span > 100 MHz and f T ≤ f1 + 50 MHz, the spectrum analyzer scans in the B0 band;

[0015] When the sweep width Span > 100 MHz and f T ≤ f2 + 50 MHz, the scanning mode is: if f s ≥ f1 - 50 MHz, the spectrum analyzer scans in the B1 band; if f s < f1 - 50 MHz, the spectrum analyzer scans in both the B0 and B1 bands;

[0016] When the sweep width Span > 100 MHz and f T > f2 + 50 MHz, the scanning mode is: if f s ≥ f2 - 50 MHz, the spectrum analyzer scans in the B2 band; if f s ≥ f1 - 50 MHz, the spectrum analyzer scans in the B1 and B2 bands; if f s < f1 - 50 MHz, the spectrum analyzer scans in the B0, B1, and B2 bands.

[0017] Furthermore, the value of the cross - band frequency point f1 is: 3.4 GHz ± 50 MHz, and the value of the cross - band frequency point f2 is: 4.7 GHz ± 50 MHz.

[0018] Furthermore, the calculation formula for the sweep width Span is:

[0019] span = f T - fs.

[0020] Furthermore, when the sweep width Span ≤ 100 MHz, the spectrum analyzer does not perform cross - band scanning.

[0021] Further, the spectrum analyzer includes a radio frequency attenuator, a switch 1, a switch filter group, a low-pass filter, a first mixer, a first scanning local oscillator, a first intermediate frequency filter, an amplifier 1, a switch 2, a second mixer, a second local oscillator, a second intermediate frequency filter, an amplifier 2, a third mixer, a third local oscillator, a third intermediate frequency filter and a digital intermediate frequency processing unit;

[0022] Among them, the RF signal input is sequentially passed through the RF attenuator and the controllable preamplifier to switch 1, one RF signal of switch 1 is sequentially passed through the low-pass filter, the first mixer, the first intermediate frequency filter, amplifier 1, and the second mixer, and the second mixer outputs the intermediate frequency to switch 2; another RF signal of switch 1 is sequentially passed through the switch filter group and the first mixer, and the first mixer outputs the intermediate frequency to switch 2; the intermediate frequency output by switch 2 is sequentially passed through the second intermediate frequency filter, amplifier 2, and the third mixer, and the intermediate frequency output by the third mixer is output to the digital intermediate frequency processing unit through the third intermediate frequency filter for processing.

[0023] A spectrum analyzer, comprising a radio frequency attenuator, a switch 1, a switch filter group, a low-pass filter, a first mixer, a first scanning local oscillator, a first intermediate frequency filter, an amplifier 1, a switch 2, a second mixer, a second local oscillator, a second intermediate frequency filter, an amplifier 2, a third mixer, a third local oscillator, a third intermediate frequency filter and a digital intermediate frequency processing unit;

[0024] Among them, the RF signal input is sequentially passed through the RF attenuator and the controllable preamplifier to switch 1, one RF signal of switch 1 is sequentially passed through the low-pass filter, the first mixer, the first intermediate frequency filter, amplifier 1, and the second mixer, and the second mixer outputs the intermediate frequency to switch 2; another RF signal of switch 1 is sequentially passed through the switch filter group and the first mixer, and the first mixer outputs the intermediate frequency to switch 2; the intermediate frequency output by switch 2 is sequentially passed through the second intermediate frequency filter, amplifier 2, and the third mixer, and the intermediate frequency is output by the third mixer through the third intermediate frequency filter to the digital intermediate frequency processing unit for processing.

[0025] Furthermore, the RF input frequency of the spectrum analyzer is 9kHz to 6GHz, which is divided into three bands for scanning. The frequency ranges of the three bands are:

[0026] B0: 9kHz≤RF≤f1

[0027] B1: f1 <RF≤f2

[0028] B2: f2 <RF≤6GHz

[0029] Among them, f1 and f2 are cross-band frequency points: f1 = 3.4 GHz ± 50 MHz, f2 = 4.7 GHz ± 50 MHz.

[0030] A computer storage medium stores a readable program, and when the program is running, the above-mentioned spectrum analyzer cross-band scanning method can be executed.

[0031] An electronic device, comprising: a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other through the communication bus;

[0032] The memory is used to store at least one executable instruction, and the executable instruction enables the processor to execute operations corresponding to the above-mentioned cross-band scanning method of a spectrum analyzer.

[0033] A computer program product includes computer instructions, wherein the computer instructions instruct a computing device to execute operations corresponding to the above-mentioned cross-band scanning method of a spectrum analyzer.

[0034] Beneficial effects of the present invention:

[0035] The spectrum analyzer scanning of the present invention is designed based on two principles: no cross-band scanning when Span≤100MHz, and cross-band frequency points f1 and f2 can be adjusted in the frequency range of ±50MHz; the spectrum analyzer does not need to perform cross-band scanning when the sweep width Span≤100MHz, and the cross-band frequency points can be adjusted in the frequency range of ±50MHz. The cross-band scanning is significantly reduced relative to the fixed cross-band frequency points, which is beneficial to improving the measurement speed and efficiency of the spectrum analyzer. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1 It is a schematic diagram of the structure of the spectrum analyzer of the present invention;

[0038] Figure 2 It is a flow chart of the cross-band scanning method of the spectrum analyzer of the present invention. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Example 1

[0041] like Figure 1 As shown, the spectrum analyzer includes a radio frequency attenuator, a switch 1, a switch filter group, a low-pass filter, a first mixer, a first scanning local oscillator, a first intermediate frequency filter, an amplifier 1, a switch 2, a second mixer, a second local oscillator, a second intermediate frequency filter, an amplifier 2, a third mixer, a third local oscillator, a third intermediate frequency filter and a digital intermediate frequency processing unit;

[0042] Among them, the RF signal input is sequentially passed through the RF attenuator and the controllable preamplifier to switch 1, one RF signal of switch 1 is sequentially passed through the low-pass filter, the first mixer, the first intermediate frequency filter, amplifier 1, and the second mixer, and the second mixer outputs the intermediate frequency to switch 2; another RF signal of switch 1 is sequentially passed through the switch filter group and the first mixer, and the first mixer outputs the intermediate frequency to switch 2; the intermediate frequency output by switch 2 is sequentially passed through the second intermediate frequency filter, amplifier 2, and the third mixer, and the intermediate frequency output by the third mixer is output to the digital intermediate frequency processing unit through the third intermediate frequency filter for processing.

[0043] The RF input frequency of the spectrum analyzer is 9kHz~6GHz, which is divided into three bands for scanning. The frequency ranges of the three bands are:

[0044] B0: 9kHz≤RF≤3.4GHz(f1)

[0045] B1: (f1) 3.4GHz <RF≤4.7GHz(f2)

[0046] B2: (f2) 4.7GHz <RF≤6GHz

[0047] Users can set the start frequency f within the spectrum analyzer operating frequency range. s and the stop frequency f T The spectrum analyzer can scan in a single band or in two or three consecutive bands. Figure 1 It can be seen that the cross-band frequency points f1 and f2 are 3.4 GHz and 4.7 GHz respectively. In the traditional spectrum scanning design, cross-band scanning is required as long as the starting frequency and the ending frequency are not in the same band.

[0048] In this embodiment, the spectrum analyzer sweep width Span, the starting frequency f s and the stop frequency f T The settings determine whether cross-band scanning is required, that is, when:

[0049] 1) If the sweep width Span≤100MHz, the spectrum analyzer does not scan across bands;

[0050] 2) The cross-band frequencies f1 and f2 can be adjusted within the frequency range of ±50MHz.

[0051] Example 2

[0052] Based on the spectrum analyzer in Example 1, a cross-band scanning method for a spectrum analyzer is proposed in this example, which specifically includes the following steps:

[0053] S1. Calculate the sweep width Span according to the starting frequency f s and the ending frequency f T set by the user;

[0054] The calculation formula for the sweep width Span is:

[0055] span = f T - fs

[0056] S2. When the sweep width Span ≤ 100 MHz, perform the following scanning method:

[0057] S21. If f T ≤ f1 + 50 MHz, the spectrum analyzer scans in the B0 band;

[0058] S22. If f1 + 50 MHz < f T ≤ f2 + 50 MHz, the spectrum analyzer scans in the B1 band;

[0059] S23. If f2 + 50 MHz < f T , the spectrum analyzer scans in the B2 band.

[0060] S3. When the sweep width Span > 100 MHz and f T ≤ f1 + 50 MHz, the spectrum analyzer scans in the B0 band.

[0061] S4. When the sweep width Span > 100 MHz and f T ≤ f2 + 50 MHz, perform the following scanning method:

[0062] S41. If f s ≥ f1 - 50 MHz, the spectrum analyzer scans in the B1 band;

[0063] S42. If f s < f1 - 50 MHz, the spectrum analyzer scans in both the B0 and B1 bands.

[0064] S5. When the sweep width Span > 100 MHz and f T > f2 + 50 MHz, perform the following scanning method:

[0065] S51. If f s ≥ f2 - 50 MHz, the spectrum analyzer scans in the B2 band;

[0066] S52, if f s ≥ f1 - 50 MHz, the spectrum analyzer scans in the B1 and B2 bands;

[0067] S53, if f s < f1 - 50 MHz, the spectrum analyzer scans in the B0, B1, and B2 bands.

[0068] Based on a similar inventive concept, an embodiment of the present invention further provides a computer storage medium storing a readable program that, when executed, can perform the above-described spectrum analyzer cross-band scanning method.

[0069] Based on a similar inventive concept, an embodiment of the present invention provides an electronic device, including: a processor, a memory, a communication interface, and a communication bus, where the processor, the memory, and the communication interface complete communication with each other through the communication bus;

[0070] The memory is used to store at least one executable instruction, and the executable instruction causes the processor to perform operations corresponding to the above-described spectrum analyzer cross-band scanning method.

[0071] Based on a similar inventive concept, an embodiment of the present invention further provides a computer program product including computer instructions that direct a computing device to perform operations corresponding to the above-described spectrum analyzer cross-band scanning method.

[0072] The method of the present invention can be implemented in hardware, firmware, or be implemented as software or computer code that can be stored in a recording medium (such as a CDROM, RAM, floppy disk, hard disk, or magneto-optical disk), or be implemented as computer code originally stored in a remote recording medium or a non-transitory machine-readable medium and downloaded through a network and stored in a local recording medium, so that the method described herein can be stored in such software processing on a recording medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware (such as an ASIC or FPGA). It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component (such as RAM, ROM, flash memory, etc.) that can store or receive software or computer code, and when the software or computer code is accessed and executed by the computer, the processor, or the hardware, the method described herein is implemented. In addition, when a general-purpose computer accesses the code for implementing the method shown herein, the execution of the code converts the general-purpose computer into a dedicated computer for executing the method shown herein.

[0073] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0074] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A spectrum analyzer cross-band scanning method, characterized in that: The RF input frequency of the spectrum analyzer is 9kHz~6GHz, which is divided into three bands for scanning. The frequency ranges of the three bands are: B0: 9kHz≤RF≤f1 B1: f1 <RF≤f2 B2: f2 <RF≤6GHz Among them, f1 and f2 are cross-band frequency points; The cross-band scanning method of the spectrum analyzer comprises the following steps: According to the starting frequency f set by the user s and the stop frequency f T , calculate the sweep width Span; When the sweep width Span≤100MHz, the scanning mode is: if f T ≤f1+50MHz, the spectrum analyzer scans in the B0 band; if f1+50MHz <f T ≤f2+50MHz, the spectrum analyzer scans in the B1 band; if f2+50MHz <f T , the spectrum analyzer scans in the B2 band; When the sweep width Span>100MHz and f T When ≤f1+50MHz, the spectrum analyzer scans in the B0 band; When the sweep width Span>100MHz and f T When ≤f2+50MHz, the scanning mode is: if f s ≥f1-50MHz, the spectrum analyzer scans in the B1 band; if f s <f1-50MHz, the spectrum analyzer scans in the two bands B0 and B1: When the sweep width Span>100MHz and f T >f2+50MHz, the scanning mode is: if f s ≥f2-50MHz, the spectrum analyzer scans in the B2 band; if f s ≥f1-50MHz, the spectrum analyzer scans in the B1 and B2 bands; if f s <f1-50MHz, the spectrum analyzer scans in three bands: B0, B1 and B2.

2. The cross-band scanning method of a spectrum analyzer according to claim 1, characterized in that: The value of the cross-band frequency point f1 is: 3.4 GHz±50 MHz, and the value of the cross-band frequency point f2 is: 4.7 GHz±50 MHz.

3. The cross-band scanning method of a spectrum analyzer according to claim 1, characterized in that: The calculation formula of the sweep width Span is: span=f T -fs。 4. The cross-band scanning method of a spectrum analyzer according to claim 3, characterized in that: When the sweep width Span≤100MHz, the spectrum analyzer does not scan across bands.

5. The cross-band scanning method of a spectrum analyzer according to claim 1, characterized in that: The spectrum analyzer includes a radio frequency attenuator, a switch 1, a switch filter group, a low-pass filter, a first mixer, a first scanning local oscillator, a first intermediate frequency filter, an amplifier 1, a switch 2, a second mixer, a second local oscillator, a second intermediate frequency filter, an amplifier 2, a third mixer, a third local oscillator, a third intermediate frequency filter and a digital intermediate frequency processing unit; Among them, the RF signal input is sequentially passed through the RF attenuator and the controllable preamplifier to switch 1, one RF signal of switch 1 is sequentially passed through the low-pass filter, the first mixer, the first intermediate frequency filter, amplifier 1, and the second mixer, and the second mixer outputs the intermediate frequency to switch 2; another RF signal of switch 1 is sequentially passed through the switch filter group and the first mixer, and the first mixer outputs the intermediate frequency to switch 2; the intermediate frequency output by switch 2 is sequentially passed through the second intermediate frequency filter, amplifier 2, and the third mixer, and the intermediate frequency output by the third mixer is output to the digital intermediate frequency processing unit through the third intermediate frequency filter for processing.

6. A spectrum analyzer, characterized in that: It includes a radio frequency attenuator, a switch 1, a switch filter group, a low-pass filter, a first mixer, a first scanning local oscillator, a first intermediate frequency filter, an amplifier 1, a switch 2, a second mixer, a second local oscillator, a second intermediate frequency filter, an amplifier 2, a third mixer, a third local oscillator, a third intermediate frequency filter and a digital intermediate frequency processing unit; Among them, the RF signal input is sequentially passed through the RF attenuator and the controllable preamplifier to switch 1, one RF signal of switch 1 is sequentially passed through the low-pass filter, the first mixer, the first intermediate frequency filter, amplifier 1, and the second mixer, and the second mixer outputs the intermediate frequency to switch 2; another RF signal of switch 1 is sequentially passed through the switch filter group and the first mixer, and the first mixer outputs the intermediate frequency to switch 2; the intermediate frequency output by switch 2 is sequentially passed through the second intermediate frequency filter, amplifier 2, and the third mixer, and the intermediate frequency is output by the third mixer through the third intermediate frequency filter to the digital intermediate frequency processing unit for processing.

7. A spectrum analyzer according to claim 6, characterized in that: The RF input frequency of the spectrum analyzer is 9kHz~6GHz, which is divided into three bands for scanning. The frequency ranges of the three bands are: B0: 9kHz≤RF≤f1 B1: f1<RF≤f2 B2: f2 <RF≤6GHz Among them, f1 and f2 are cross-band frequency points: f1 = 3.4 GHz ± 50 MHz, f2 = 4.7 GHz ± 50 MHz.

8. A computer storage medium storing a readable program, characterized in that: When the program is running, the cross-band scanning method of a spectrum analyzer as described in any one of claims 1 to 5 can be executed.

9. An electronic device, characterized in that: include: A processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other via the communication bus; The memory is used to store at least one executable instruction, and the executable instruction enables the processor to perform operations corresponding to the cross-band scanning method of a spectrum analyzer according to any one of claims 1 to 5.

10. A computer program product comprising computer instructions, characterized in that: The computer instructions instruct the computing device to execute operations corresponding to the cross-band scanning method of a spectrum analyzer as claimed in any one of claims 1 to 5.

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