CN206114773U - High performance spectral analyser - Google Patents
High performance spectral analyser Download PDFInfo
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- CN206114773U CN206114773U CN201620994424.9U CN201620994424U CN206114773U CN 206114773 U CN206114773 U CN 206114773U CN 201620994424 U CN201620994424 U CN 201620994424U CN 206114773 U CN206114773 U CN 206114773U
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Abstract
The utility model provides a high performance spectral analyser relates to the data processing field, a serial communication port, the analysis appearance includes: a display uni. Display element signal connection is in the treater, the treater is signal connection in peak detection unit, oscillating unit and adc respectively, peak detection unit signal connection is in programme -controlled amplifying unit, oscillating unit signal connection is in low -pass filtering unit, adc signal connection in the detection unit, programme -controlled amplifying unit respectively signal connection in low -pass filtering unit and mixing unit, the mixing unit is signal connection in first amplifying unit and second amplifying unit respectively, second amplifying unit signal connection is in the band -pass filter unit. The utility model has the advantages of simple structure, with low costs, the operation is stable, the error is little and the sexual valence relative altitude.
Description
Technical field
The present invention relates to spectrum analyses field, more particularly to a kind of high-performance spectrum analyzer.
Background technology
Spectrum analyzer is the instrument for studying signal of telecommunication spectrum structure, for signal distortion, percentage modulation spectral purity, frequency
The measurement of the signal parameter such as rate degree of stability and crosstalk, may be used to some ginsengs of the circuit systems such as measuring amplifier and wave filter
Number, is a kind of multiduty electronic measuring instrument.It can be described as frequency domain oscillograph, tracking oscillograph, analysis oscillograph, harmonic wave again
Analyzer, frequency characteristic analyzer or Fourier analyzer etc..Modern spectrum analyzer can in an analog fashion or digital form is aobvious
Show analysis result, less than 1 hertz of very low frequency can be analyzed to the signal of telecommunication of whole radio frequency bands of submillimeter region.
The main function of spectrum analyzer system is the spectral characteristic that input signal is shown in frequency domain.Spectrum analyzer is according to letter
The difference of number processing mode, typically there is two types；Instant spectrum analyzer（Real-Time Spectrum Analyzer）With
Scanning tuning spectrum analyzer（Sweep-Tuned Spectrum Analyzer). the function of real-time frequency analyser is same
The signal amplitude of frequency domain is shown in a flash, and its operation principle is that have corresponding wave filter for different frequency signals with inspection
Know device（Detector), then pass the signal to via synchronous multiplexing scanning device and shown on the display instruments such as CRT or liquid crystal
Show, its advantage is can display cycle property stray wave（Periodic Random Waves）Moment reaction, its have the disadvantage high price and
Limited performance in frequency range scope, multiplexing swap time of the number of wave filter and maximum（Switching Time). it is the most frequently used
Spectrum analyzer is scanning tuning spectrum analyzer, and its basic structure is similar to Super Heterodyne Receiver, and operation principle is input letter
Number Jing attenuators are directly applied to mixer, can the local oscillator Jing scanning generators synchronous with CRT of modulation produce at any time
The frequency of oscillation of catch cropping linear change, the intermediate-freuqncy signal Jing after mixer and input signal smear frequency reducing（IF）Amplify again, filter
With the vertical direction plate that detection is sent to CRT, therefore the longitudinal axis in CRT shows the corresponding relation of signal amplitude and frequency.
The content of the invention
In consideration of it, the invention provides a kind of high-performance spectrum analyzer, the present invention is with simple structure, low cost, fortune
The advantages of capable stable, little error and high cost performance.
The technical solution used in the present invention is as follows：
A kind of high-performance spectrum analyzer, it is characterised in that the analyser includes：For showing the display list of frequency spectrum
Unit；The display unit signal is connected to the processor for controlling analyser work；Respectively signal is connected to the processor
For carrying out the peak detection unit of peak detection, the oscillating unit for generating oscillator signal and for analogue signal to be changed
For the analog-digital converter of digital signal；The peak detection cell signal is connected to the programming amplifying unit for programming amplifying；
The oscillating unit signal is connected to the low-pass filter unit for low-pass filtering；The analog-digital converter signal be connected to for
The detection unit of detection；Respectively signal is connected to the low-pass filter unit and the mixing for mixing to the programming amplifying unit
Unit；Respectively signal is connected to the first amplifying unit for being amplified process to signal and the second amplification to the mixing unit
Unit；The second amplifying unit signal is connected to the bandpass filtering unit for bandpass filtering.
The detection unit includes：For the active rectifier of rectification；The active rectifier signal is connected to for entering
Row square/division arithmetic square/divider；Described square/divider signals are connected to for as input buffering or filtering
Individual buffer amplifier；The individual buffer amplifier signal is connected to biasing circuit.
The mixing unit is lower mixing unit；The input difference magnitude of voltage of the mixing unit is not less than 2Vpp；It is described
The input difference electric voltage frequency of mixing unit is 250MHz.
The display unit includes：Display and keyboard；The monitor signal is connected with processor, for according to process
The signal display waveform that device is sended over；The keyboard signal is connected with processor, for being supplied to staff's input control
The operation of order control analyser.
The processor includes：It is described for being supplied to display unit and other units to connect the interface unit of processor
Interface unit signal is connected to the D/A conversion unit for converting digital signals into analogue signal；The digital-to-analogue conversion single-pass
Cross interface unit signal and be connected to display unit；The processor also includes：For judging whether magnitude of voltage meets area requirement
Judging unit.
Using above technical scheme, this utility model generates following beneficial effect：
1st, small volume, low cost：Vibration electric unit of the present utility model, only needs a small amount of peripheral components to may make up completely
Signal source, and, high resolution fast with conversion speed change that frequency speed is fast, and bandwidth is easy to control, the features such as signal stabilization.
Additionally, the only lower mixing unit of mixing unit, only need to arrange an intermediate frequency narrow band filter.Further reduce cost
2nd, simple structure：Simple structure of the present utility model, each several part annexation is easy to understand, and easily commercial production
Manufacture, further reduces manufacturing cost.
3rd, measure accurate：Oscillating unit internal structure of the present utility model include active rectifier (i.e. absolute value element),
Square/divider, filter amplifier, individual buffer amplifier and biasing circuit.Wherein, buffer amplifier both can be used as being input into and delay
Punching, also may make up active filter filtering, improve accuracy of measurement.
Description of the drawings
Fig. 1 is a kind of analyser structural representation of high-performance spectrum analyzer of the present invention.
Specific embodiment
All features disclosed in this specification, or disclosed all methods or during the step of, except mutually exclusive
Feature and/or step beyond, can combine by any way.
This specification（Including any accessory claim, summary）Disclosed in any feature, unless specifically stated otherwise,
Equivalent by other or with similar purpose alternative features are replaced.I.e., unless specifically stated otherwise, each feature is a series of
An example in equivalent or similar characteristics.
A kind of high-performance spectrum analyzer is provided in the embodiment of the present invention 1, analyser structure is as shown in Figure 1：
A kind of high-performance spectrum analyzer, it is characterised in that the analyser includes：For showing the display list of frequency spectrum
Unit；The display unit signal is connected to the processor for controlling analyser work；Respectively signal is connected to the processor
For carrying out the peak detection unit of peak detection, the oscillating unit for generating oscillator signal and for analogue signal to be changed
For the analog-digital converter of digital signal；The peak detection cell signal is connected to the programming amplifying unit for programming amplifying；
The oscillating unit signal is connected to the low-pass filter unit for low-pass filtering；The analog-digital converter signal be connected to for
The detection unit of detection；Respectively signal is connected to the low-pass filter unit and the mixing for mixing to the programming amplifying unit
Unit；Respectively signal is connected to the first amplifying unit for being amplified process to signal and the second amplification to the mixing unit
Unit；The second amplifying unit signal is connected to the bandpass filtering unit for bandpass filtering.
The detection unit includes：For the active rectifier of rectification；The active rectifier signal is connected to for entering
Row square/division arithmetic square/divider；Described square/divider signals are connected to for as input buffering or filtering
Individual buffer amplifier；The individual buffer amplifier signal is connected to biasing circuit.
The mixing unit is lower mixing unit；The input difference magnitude of voltage of the mixing unit is not less than 2Vpp；It is described
The input difference electric voltage frequency of mixing unit is 250MHz.
The display unit includes：Display and keyboard；The monitor signal is connected with processor, for according to process
The signal display waveform that device is sended over；The keyboard signal is connected with processor, for being supplied to staff's input control
The operation of order control analyser.
The processor includes：It is described for being supplied to display unit and other units to connect the interface unit of processor
Interface unit signal is connected to the D/A conversion unit for converting digital signals into analogue signal；The digital-to-analogue conversion single-pass
Cross interface unit signal and be connected to display unit；The processor also includes：For judging whether magnitude of voltage meets area requirement
Judging unit.
A kind of high-performance frequency spectrum analysis method is provided in the embodiment of the present invention 2：
A kind of frequency spectrum analysis method based on high-performance spectrum analyzer, it is characterised in that methods described includes following step
Suddenly：
Step 1：System initialization, each unit module initialization；
Step 2：Jing after the amplification of the first amplifying unit, be sent to mixing unit carries out Frequency mixing processing to signal；
Step 3：Signal after Frequency mixing processing is respectively sent to programming amplifying unit and the second amplifying unit by mixing unit；
Step 4：Programming amplifying unit carries out sending the signal to peak detection unit after the gain of certain magnitude to signal,
Execution step 5；Second amplifying unit sends to bandpass filtering unit after being amplified to signal；Single-pass filter unit is to receiving
Signal carry out bandpass filtering, filtered signal is sent to detection unit；Detection unit is examined to the signal for receiving
Send after ripple to analog-digital converter, execution step 7；
Step 5：Processor control peak detection unit carries out peak detection；According to the result of peak detection, processor is sent out
D/A conversion unit transmitting control commands are sent, changes the gain of programming amplifying unit；
Step 6：Processor transmitting control commands to oscillating unit carries out frequency sweep process；Oscillating unit sends frequency sweep result
To processor；
Step 7：Processor transmitting control commands to analog-digital converter carries out signal sampling, and analog-digital converter is by sampled result
Send to processor；
Step 8：Sampled result is sent to display unit and is shown by processor.
The oscillating unit carries out the method for frequency sweep：It is single that default frequency sweep initial frequency is sent to vibration by processor
Unit；Frequency sweep initial frequency is added and obtains new swept frequency by oscillating unit with the default frequency frequency departure of tune, and oscillating unit makes
Frequency sweep is carried out with the frequency.
The processor changes the method for programming amplifying module gain：The magnitude of voltage that processor obtains analog-digital converter
It is compared with preset voltage value, if the magnitude of voltage for obtaining is more than default magnitude of voltage, control gain reduces；If the electricity for obtaining
Pressure value is less than default magnitude of voltage, then control gain increase.
The band filter carries out the method for selection to mid frequency includes step：
Step 1：If the expression formula of original input signal is：
Wherein,For modulation index；For carrier amplitude；
Step 2：According to the expression formula of signal, the frequency of signal is calculated；And maximum amplitude value；
Step 3：Second maximum is found out in the frequency spectrum of signalAnd respective frequencies, then judgeIt is right
The amplitude that should be put, if being more than default first threshold, for frequency-modulated wave,As its mid frequency；If less than default
First threshold, then be amplitude-modulated wave or persistent wave,Frequency centered on then；Due to a width of 20kHz of amplitude-modulated wave band, only need to judgeOrPoint value, if be less than default Second Threshold, be persistent wave, if be more than default Second Threshold
It is then amplitude-modulated wave.
A kind of high-performance spectrum analyzer is provided in the embodiment of the present invention 3, analyser structure chart is as shown in Figure 1：
A kind of high-performance spectrum analyzer, it is characterised in that the analyser includes：For showing the display list of frequency spectrum
Unit；The display unit signal is connected to the processor for controlling analyser work；Respectively signal is connected to the processor
For carrying out the peak detection unit of peak detection, the oscillating unit for generating oscillator signal and for analogue signal to be changed
For the analog-digital converter of digital signal；The peak detection cell signal is connected to the programming amplifying unit for programming amplifying；
The oscillating unit signal is connected to the low-pass filter unit for low-pass filtering；The analog-digital converter signal be connected to for
The detection unit of detection；Respectively signal is connected to the low-pass filter unit and the mixing for mixing to the programming amplifying unit
Unit；Respectively signal is connected to the first amplifying unit for being amplified process to signal and the second amplification to the mixing unit
Unit；The second amplifying unit signal is connected to the bandpass filtering unit for bandpass filtering.
The detection unit includes：For the active rectifier of rectification；The active rectifier signal is connected to for entering
Row square/division arithmetic square/divider；Described square/divider signals are connected to for as input buffering or filtering
Individual buffer amplifier；The individual buffer amplifier signal is connected to biasing circuit.
The mixing unit is lower mixing unit；The input difference magnitude of voltage of the mixing unit is not less than 2Vpp；It is described
The input difference electric voltage frequency of mixing unit is 250MHz.
The display unit includes：Display and keyboard；The monitor signal is connected with processor, for according to process
The signal display waveform that device is sended over；The keyboard signal is connected with processor, for being supplied to staff's input control
The operation of order control analyser.
The processor includes：It is described for being supplied to display unit and other units to connect the interface unit of processor
Interface unit signal is connected to the D/A conversion unit for converting digital signals into analogue signal；The digital-to-analogue conversion single-pass
Cross interface unit signal and be connected to display unit；The processor also includes：For judging whether magnitude of voltage meets area requirement
Judging unit.
A kind of frequency spectrum analysis method based on high-performance spectrum analyzer, it is characterised in that methods described includes following step
Suddenly：
Step 1：System initialization, each unit module initialization；
Step 2：Jing after the amplification of the first amplifying unit, be sent to mixing unit carries out Frequency mixing processing to signal；
Step 3：Signal after Frequency mixing processing is respectively sent to programming amplifying unit and the second amplifying unit by mixing unit；
Step 4：Programming amplifying unit carries out sending the signal to peak detection unit after the gain of certain magnitude to signal,
Execution step 5；Second amplifying unit sends to bandpass filtering unit after being amplified to signal；Single-pass filter unit is to receiving
Signal carry out bandpass filtering, filtered signal is sent to detection unit；Detection unit is examined to the signal for receiving
Send after ripple to analog-digital converter, execution step 7；
Step 5：Processor control peak detection unit carries out peak detection；According to the result of peak detection, processor is sent out
D/A conversion unit transmitting control commands are sent, changes the gain of programming amplifying unit；
Step 6：Processor transmitting control commands to oscillating unit carries out frequency sweep process；Oscillating unit sends frequency sweep result
To processor；
Step 7：Processor transmitting control commands to analog-digital converter carries out signal sampling, and analog-digital converter is by sampled result
Send to processor；
Step 8：Sampled result is sent to display unit and is shown by processor.
The oscillating unit carries out the method for frequency sweep：It is single that default frequency sweep initial frequency is sent to vibration by processor
Unit；Frequency sweep initial frequency is added and obtains new swept frequency by oscillating unit with the default frequency frequency departure of tune, and oscillating unit makes
Frequency sweep is carried out with the frequency.
The processor changes the method for programming amplifying module gain：The magnitude of voltage that processor obtains analog-digital converter
It is compared with preset voltage value, if the magnitude of voltage for obtaining is more than default magnitude of voltage, control gain reduces；If the electricity for obtaining
Pressure value is less than default magnitude of voltage, then control gain increase.
The band filter carries out the method for selection to mid frequency includes step：
Step 1：If the expression formula of original input signal is：
Wherein,For modulation index；For carrier amplitude；
Step 2：According to the expression formula of signal, the frequency of signal is calculated；And maximum amplitude value；
Step 3：Second maximum is found out in the frequency spectrum of signalAnd respective frequencies, then judgeIt is right
The amplitude that should be put, if being more than default first threshold, for frequency-modulated wave,As its mid frequency；If less than default
First threshold, then be amplitude-modulated wave or persistent wave,Frequency centered on then；Due to a width of 20kHz of amplitude-modulated wave band, only need to judgeOrPoint value, if be less than default Second Threshold, be persistent wave, if be more than default Second Threshold
It is then amplitude-modulated wave.
The invention is not limited in aforesaid specific embodiment.The present invention is expanded to and any in this manual disclosed
New feature or any new combination, and the arbitrary new method that discloses or the step of process or any new combination.
Claims (5)
1. a kind of high-performance spectrum analyzer, it is characterised in that the analyser includes：For showing the display unit of frequency spectrum；
The display unit signal is connected to the processor for controlling analyser work；The processor respectively signal be connected to for
Carry out the peak detection unit of peak detection, the oscillating unit for generating oscillator signal and for converting analog signals into number
The analog-digital converter of word signal；The peak detection cell signal is connected to the programming amplifying unit for programming amplifying；It is described
Oscillating unit signal is connected to the low-pass filter unit for low-pass filtering；The analog-digital converter signal is connected to for detection
Detection unit；Respectively signal is connected to the low-pass filter unit and the mixing list for mixing to the programming amplifying unit
Unit；Respectively signal is connected to the first amplifying unit for being amplified process to signal to the mixing unit and the second amplification is single
Unit；The second amplifying unit signal is connected to the bandpass filtering unit for bandpass filtering.
2. high-performance spectrum analyzer as claimed in claim 1, it is characterised in that the detection unit includes：For rectification
Active rectifier；The active rectifier signal is connected to for carrying out square/division arithmetic square/divider；It is described
Square/divider signals be connected to for as input buffering or filter individual buffer amplifier；The individual buffer is amplified
Device signal is connected to biasing circuit.
3. high-performance spectrum analyzer as claimed in claim 2, it is characterised in that the mixing unit is lower mixing unit；
The input difference magnitude of voltage of the mixing unit is not less than 2Vpp；The input difference electric voltage frequency of the mixing unit is
250MHz。
4. high-performance spectrum analyzer as claimed in claim 3, it is characterised in that the display unit includes：Display and
Keyboard；The monitor signal is connected with processor, for the signal display waveform sended over according to processor；The keyboard
Signal is connected with processor, for being supplied to staff's input control command to control the operation of analyser.
5. high-performance spectrum analyzer as claimed in claim 4, it is characterised in that the processor includes：For being supplied to
Display unit and other units connect the interface unit of processor, and the interface unit signal is connected to for digital signal to be turned
It is changed to the D/A conversion unit of analogue signal；The digital-to-analogue conversion single pass-through interface unit signal is connected to display unit；It is described
Processor also includes：For judging whether magnitude of voltage meets the judging unit of area requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620994424.9U CN206114773U (en) | 2016-08-31 | 2016-08-31 | High performance spectral analyser |
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|---|---|---|---|
| CN201620994424.9U CN206114773U (en) | 2016-08-31 | 2016-08-31 | High performance spectral analyser |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106353595A (en) * | 2016-08-31 | 2017-01-25 | 成都市和平科技有限责任公司 | High-performance spectrum analyzer and spectrum analysis method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106353595A (en) * | 2016-08-31 | 2017-01-25 | 成都市和平科技有限责任公司 | High-performance spectrum analyzer and spectrum analysis method |
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Granted publication date: 20170419 Termination date: 20180831 |