CN112994807A - Automatic calibration system and method for signal source - Google Patents
Automatic calibration system and method for signal source Download PDFInfo
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- CN112994807A CN112994807A CN202110159633.7A CN202110159633A CN112994807A CN 112994807 A CN112994807 A CN 112994807A CN 202110159633 A CN202110159633 A CN 202110159633A CN 112994807 A CN112994807 A CN 112994807A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/11—Monitoring; Testing of transmitters for calibration
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements
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Abstract
The invention discloses an automatic calibration system and method of a signal source, the system comprises a power divider, a power meter, a frequency spectrograph and a calibration device, wherein the signal source is respectively connected with the power meter and the frequency spectrograph through the power divider; the calibration device includes: the signal source control unit is used for controlling the signal source to perform stepping attenuation by a preset power attenuation value from the upper limit value of the preset power attenuation range and outputting signals with different power attenuations until the signals are attenuated to the lower limit value of the preset power attenuation range; the power meter control unit is used for controlling the power meter to detect the real power value of the signal when the signal source outputs the signal for the first time; the frequency spectrograph control unit is used for controlling the frequency spectrograph to detect the power increment value of the signal output by the signal source every time relative to the signal output for the first time; the automatic calibration unit is used for taking the sum of the real power value corresponding to the signal output by the signal source in each attenuation and the power increment value as the actual power value output by the signal source in each attenuation. The invention can realize automatic calibration.
Description
Technical Field
The invention relates to the technical field of signal source calibration, in particular to an automatic calibration system and method of a signal source.
Background
The signal source is used for generating signals with certain characteristics, and is one of key instruments in radio measurement and testing. As the demand for frequency resources from radio equipment increases, the frequency coverage of signal sources also becomes wider and wider, and the signal bandwidth also increases.
As the frequency range and bandwidth covered by the signal source increases, the calibration workload of the instrument also increases. The traditional calibration method depends on manual calibration, the manual calibration has interference of human factors, the stability is poor, and the calibration process is long in time consumption and low in efficiency.
Disclosure of Invention
The invention mainly solves the technical problem of providing an automatic calibration system and method of a signal source, which can realize automatic calibration.
In order to solve the technical problems, the invention adopts a technical scheme that: the automatic calibration system of the signal source is provided and comprises a power divider, a power meter, a frequency spectrograph and a calibration device, wherein the output end of the signal source is connected with the input end of the power divider, and the two output ends of the power divider are respectively connected with the power meter and the frequency spectrograph; the calibration device comprises a signal source control unit, a power meter control unit, a frequency spectrograph control unit and an automatic calibration unit;
the signal source control unit is used for controlling the signal source to perform stepping attenuation by a preset power attenuation value from the upper limit value of a preset power attenuation range and outputting signals with different power attenuations until the signals are attenuated to the lower limit value of the preset power attenuation range;
the power meter control unit is used for controlling the power meter to detect the real power value of the signal when the signal source outputs the signal for the first time;
the frequency spectrograph control unit is used for controlling the frequency spectrograph to detect the power increment value of the signal output by the signal source every time relative to the signal output for the first time;
the automatic calibration unit is used for taking the sum of the real power value corresponding to the signal output by the signal source in each attenuation and the power increment value as the actual power value output by the signal source in each attenuation.
Preferably, the calibration device further comprises a data recording unit; the data recording unit is used for recording the actual power value output by the signal source in each attenuation in the cloud server.
Preferably, the preset power attenuation range is 0-90dB, and the preset power attenuation value is 0.5 dB.
In order to solve the technical problem, the invention adopts another technical scheme that: providing an automatic calibration method of a signal source, wherein the output end of the signal source is connected with the input end of a power divider, and two output ends of the power divider are respectively connected with a power meter and a spectrometer; the automatic calibration method comprises the following steps:
the signal source is controlled to perform stepping attenuation by a preset power attenuation value from the upper limit value of the preset power attenuation range, and signals with different power attenuation are output until the signals are attenuated to the lower limit value of the preset power attenuation range;
when the signal source outputs a signal for the first time, controlling a power meter to detect the real power value of the signal;
controlling a frequency spectrograph to detect a power increment value of a signal output by a signal source every time relative to a signal output for the first time;
and taking the sum of the real power value corresponding to the signal output by the signal source in each attenuation and the power increment value as the actual power value output by the signal source in each attenuation.
Preferably, the automatic calibration method further comprises:
and recording the actual power value output by the signal source every time of attenuation in the cloud server.
Preferably, the preset power attenuation range is 0-90dB, and the preset power attenuation value is 0.5 dB.
Different from the prior art, the invention has the beneficial effects that: the calibration efficiency stability can be improved, the manual factor interference is avoided while the labor cost is reduced, the calibration precision is improved, and the method is suitable for batch calibration of signal sources.
Drawings
FIG. 1 is a functional block diagram of an automatic calibration system for a signal source according to an embodiment of the present invention.
Fig. 2 is a schematic flow chart of an automatic calibration method for a signal source according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a schematic block diagram of an automatic calibration system for a signal source according to an embodiment of the present invention is shown. In the embodiment of the present invention, the automatic calibration system includes a power divider 11, a power meter 12, a spectrum analyzer 13 and a calibration device 14, an output end of a signal source 10 is connected to an input end of the power divider 11, and two output ends of the power divider 11 are respectively connected to the power meter 12 and the spectrum analyzer 13; the calibration apparatus 14 includes a signal source control unit 141, a power meter control unit 142, a spectrometer control unit 143, and an automatic calibration unit 144.
The signal source control unit 141 is configured to control the signal source 10 to perform step attenuation with a preset power attenuation value from an upper limit value of a preset power attenuation range, and output signals with different power attenuations until the signals are attenuated to a lower limit value of the preset power attenuation range. The preset power attenuation range is a range that the signal source 10 can adjust, and is within the detection range of the power meter 12 and the spectrometer 13. In this embodiment, the predetermined power attenuation range is 0-90dB, and the predetermined power attenuation value is 0.5 dB.
The power meter control unit 142 is used for controlling the power meter 12 to detect the real power value of the signal when the signal source 10 outputs the signal for the first time.
The spectrometer control unit 143 is configured to control the spectrometer 13 to detect a power increment value of the signal output by the signal source 10 each time relative to the signal output for the first time. The spectrometer 13 obtains a power increment value of a signal currently output by the signal source 10 relative to a signal output last time each time, and accumulates the power increment values obtained each time to obtain a power increment value of the signal currently output by the signal source 10 relative to the signal output first time.
The automatic calibration unit 144 is configured to use the sum of the real power value corresponding to the signal output by the signal source 10 in each attenuation and the power increment value as the actual power value output by the signal source 10 in each attenuation. The automatic calibration unit 144 may write the actual power value output by the signal source 10 every time of attenuation into the signal source 10, for example, in a certain memory chip, and output the corresponding actual power value according to the current power attenuation every time the signal source 10 outputs a signal.
In order to facilitate the recalibration after a long-term use of the signal source 10, in the present embodiment, the calibration apparatus 14 further includes a data recording unit 145; the data recording unit 145 is configured to record the actual power value output by the signal source 10 every time of attenuation in the cloud server. After the signal source 10 is used for a long time, if the power of the output signal has an error due to some reason, the actual power value of each attenuation output by the signal source 10 may be downloaded from the cloud server and written into the signal source 10 again.
Fig. 2 is a schematic flow chart of the method for automatically calibrating a signal source according to the embodiment of the present invention. In the embodiment of the invention, the output end of a signal source is connected with the input end of a power divider, and two output ends of the power divider are respectively connected with a power meter and a frequency spectrometer; the automatic calibration method comprises the following steps:
s1: and the control signal source performs stepping attenuation by the preset power attenuation value from the upper limit value of the preset power attenuation range and outputs signals with different power attenuation until the signals are attenuated to the lower limit value of the preset power attenuation range.
The preset power attenuation range is the range which can be adjusted by the signal source and is within the detection range of the power meter and the frequency spectrometer. In this embodiment, the predetermined power attenuation range is 0-90dB, and the predetermined power attenuation value is 0.5 dB.
S2: when the signal source outputs a signal for the first time, the power meter is controlled to detect the real power value of the signal.
S3: the control frequency spectrograph detects the power increment value of the signal output by the signal source every time relative to the signal output for the first time.
The spectrum analyzer obtains a power increment value of a signal currently output by the signal source relative to a signal output last time through detection each time, and the power increment value obtained each time is accumulated to obtain a power increment value of the signal currently output by the signal source 10 relative to the signal output for the first time.
S4: and taking the sum of the real power value corresponding to the signal output by the signal source in each attenuation and the power increment value as the actual power value output by the signal source in each attenuation.
The actual power value output by the signal source in each attenuation can be written into the signal source, for example, in a certain memory chip, and the signal source outputs the corresponding actual power value in each attenuation according to the current power.
In order to facilitate recalibration after long-term use of the signal source, in this embodiment, the automatic calibration method further includes:
s5: and recording the actual power value output by the signal source every time of attenuation in the cloud server.
After the signal source is used for a long time, if the power of the output signal generates errors due to some reasons, the actual power value output by the signal source in each attenuation mode can be downloaded from the cloud server and written into the signal source again.
Through the mode, the automatic calibration system and the method for the signal source, provided by the embodiment of the invention, can calibrate the signal source according to the real power value detected by the power meter and the power increment value detected by the frequency spectrometer by controlling the power meter and the signal output by the frequency spectrometer and detecting different power attenuations of the signal source without manual participation in calibration, so that automatic calibration can be realized, the stability of calibration efficiency can be improved, the labor cost is reduced, meanwhile, the interference of human factors is avoided, the calibration precision is improved, and the automatic calibration system and the method are suitable for batch calibration of the signal source.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (6)
1. An automatic calibration system of a signal source is characterized by comprising a power divider, a power meter, a frequency spectrograph and a calibration device, wherein the output end of the signal source is connected with the input end of the power divider; the calibration device comprises a signal source control unit, a power meter control unit, a frequency spectrograph control unit and an automatic calibration unit;
the signal source control unit is used for controlling the signal source to perform stepping attenuation by a preset power attenuation value from the upper limit value of a preset power attenuation range and outputting signals with different power attenuations until the signals are attenuated to the lower limit value of the preset power attenuation range;
the power meter control unit is used for controlling the power meter to detect the real power value of the signal when the signal source outputs the signal for the first time;
the frequency spectrograph control unit is used for controlling the frequency spectrograph to detect the power increment value of the signal output by the signal source every time relative to the signal output for the first time;
the automatic calibration unit is used for taking the sum of the real power value corresponding to the signal output by the signal source in each attenuation and the power increment value as the actual power value output by the signal source in each attenuation.
2. The automatic calibration system of claim 1, wherein the calibration device further comprises a data logging unit; the data recording unit is used for recording the actual power value output by the signal source in each attenuation in the cloud server.
3. The automatic calibration system of claim 1 or 2, wherein the predetermined power attenuation range is 0-90dB and the predetermined power attenuation value is 0.5 dB.
4. The automatic calibration method of the signal source is characterized in that the output end of the signal source is connected with the input end of a power divider, and the two output ends of the power divider are respectively connected with a power meter and a frequency spectrometer; the automatic calibration method comprises the following steps:
the signal source is controlled to perform stepping attenuation by a preset power attenuation value from the upper limit value of the preset power attenuation range, and signals with different power attenuation are output until the signals are attenuated to the lower limit value of the preset power attenuation range;
when the signal source outputs a signal for the first time, controlling a power meter to detect the real power value of the signal;
controlling a frequency spectrograph to detect a power increment value of a signal output by a signal source every time relative to a signal output for the first time;
and taking the sum of the real power value corresponding to the signal output by the signal source in each attenuation and the power increment value as the actual power value output by the signal source in each attenuation.
5. The auto-calibration method of claim 4, further comprising:
and recording the actual power value output by the signal source every time of attenuation in the cloud server.
6. The automatic calibration method according to claim 4 or 5, wherein the predetermined power attenuation range is 0-90dB, and the predetermined power attenuation value is 0.5 dB.
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Cited By (1)
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| CN113411143A (en) * | 2021-06-28 | 2021-09-17 | 上海创远仪器技术股份有限公司 | Power fitting processing method, system, device, processor and storage medium for eliminating uncertainty of numerical control attenuator in signal source |
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Application publication date: 20210618 |