CN108802660B - Calibration method, device and system for ALC of radio frequency signal source - Google Patents
Calibration method, device and system for ALC of radio frequency signal source Download PDFInfo
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- CN108802660B CN108802660B CN201710301090.1A CN201710301090A CN108802660B CN 108802660 B CN108802660 B CN 108802660B CN 201710301090 A CN201710301090 A CN 201710301090A CN 108802660 B CN108802660 B CN 108802660B
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Abstract
The invention provides a calibration method, equipment and a system for ALC of a radio frequency signal source, wherein the method comprises the following steps: acquiring a plurality of preset frequency values and a plurality of amplitude values; generating a test data set according to the plurality of frequency values and the plurality of amplitude values; extracting a group of test data from the test data set as first test data, wherein amplitude values of the first test data are called first amplitude values, and the first amplitude values are amplitude values except for the maximum amplitude value in the plurality of amplitude values; sending the test data set to a calibrated radio frequency signal source; reading data of a frequency spectrograph connected with a radio frequency signal source when the radio frequency signal source loads first test data, and taking the data as calibration data corresponding to the first test data; and traversing the test data to obtain standard data corresponding to the test data. The invention ensures the accuracy of the output signal of the radio frequency signal source and improves the success rate of the calibration of the radio frequency signal source.
Description
Technical Field
The invention relates to the technical field of testing, in particular to a testing and calibrating technology of a radio frequency signal source, and specifically relates to a calibration method, equipment and a system for ALC of the radio frequency signal source.
Background
The radio frequency signal source is an instrument for generating various radio frequency signals, such as a continuous wave signal, a general measurement signal, an analog modulation signal, an IQ modulation signal, a user-defined signal and the like, and has wide application in research and development, production test, electronic countermeasure and the like in various fields of mobile communication, aerospace, national defense and military industry and the like.
For any kind of radio frequency signal source instrument, the radio frequency part will have great influence on the accuracy of the signal generated by the signal source, so that the production of the high-accuracy signal source instrument needs to realize the function of the radio frequency part very accurately, and the problem of power calibration in the radio frequency signal source is the biggest influence on the accurate realization of the function of the radio frequency part. In the power control system of the rf signal source, the automatic level control ALC is an important module, and directly determines the accuracy of the output power.
In the prior art, the ALC circuit of the radio frequency signal source is calibrated at each frequency point according to a certain stepping sequence from large to small. This has the advantage that the data structure can be conveniently de-organised because each frequency point is calibrated in a monotonic order, and a frequency point corresponds to a set of calibration data. The disadvantage of this method is that the calibration fails due to too much power being set at the first calibration point at each frequency, because the ALC loop is difficult to lock due to too much power or the time required for locking is longer, and even worse, the ALC loop can be locked, which directly results in a larger error of the final output power of the rf signal source. This situation is very difficult for the scientific research field and for the enterprises that need to produce large quantities of rf signal source instruments. In addition, considering that each rf signal source instrument is more or less different in the production process, it takes a lot of time to perform power calibration measurement on each produced rf signal source, and once the calibration is inaccurate, the output error is large and rework is performed, which causes great loss to the enterprise.
Therefore, how to provide a new optimization scheme for the defects of the rf signal source in the power calibration measurement aspect, which can not only meet the accuracy of the signal generated by the rf signal source instrument, but also greatly improve the success rate of the power calibration measurement becomes a problem to be solved by those skilled in the art.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a calibration method, equipment and a system for ALC of a radio frequency signal source.
One of the objectives of the present invention is to provide a method for calibrating ALC of a radio frequency signal source, the method comprising:
acquiring a plurality of preset frequency values and a plurality of amplitude values;
generating a test data set according to the frequency values and the amplitude values, wherein the test data set comprises a plurality of groups of test data, and each group of test data comprises a frequency value and an amplitude value;
extracting a group of test data from the test data set as first test data, wherein amplitude values of the first test data are called first amplitude values, and the first amplitude values are amplitude values except for the maximum amplitude value in the plurality of amplitude values;
sending the test data set to a calibrated radio frequency signal source;
reading data of a frequency spectrograph connected with the radio frequency signal source when the radio frequency signal source loads the first test data, and taking the data as calibration data corresponding to the first test data;
and traversing the test data to obtain standard data corresponding to the test data.
In a preferred embodiment of the present invention, the method further comprises: determining a calibration sequence of the plurality of groups of test data, and traversing the test data to obtain standard data corresponding to the test data, wherein the standard data comprises: and when the test data except the first test data in the test data set are sequentially loaded by the radio frequency signal source according to the calibration sequence, data of a frequency spectrograph connected with the radio frequency signal source are used as calibration data corresponding to the test data.
In a preferred embodiment of the present invention, the first amplitude value is an amplitude value other than the smallest amplitude value among the plurality of amplitude values.
In a preferred embodiment of the invention, the calibration sequence comprises: the sequence of frequency values in the plurality of sets of test data is: incrementing from a minimum value of the plurality of frequency values to a maximum value of the plurality of frequency values or decrementing from a maximum value of the plurality of frequency values to a minimum value of the plurality of frequency values;
the order of the amplitude values in the plurality of sets of test data is: incrementing from the first amplitude value to a maximum of the plurality of amplitude values and then decrementing from the first amplitude value to a minimum of the plurality of amplitude values or decrementing from the first amplitude value to a minimum of the plurality of amplitude values and then incrementing from the first amplitude value to a maximum of the plurality of amplitude values.
In a preferred embodiment of the present invention, the method further comprises: and storing the calibration data and the test data set, and sending the calibration data and the test data set to the radio frequency signal source.
It is an object of the present invention to provide a calibration apparatus for ALC of a radio frequency signal source, the calibration apparatus comprising:
the test data generating device is used for acquiring a plurality of preset frequency values and a plurality of preset amplitude values, and generating a test data set according to the frequency values and the amplitude values, wherein the test data set comprises a plurality of groups of test data, and each group of test data comprises a frequency value and an amplitude value;
the test data selection device is used for extracting a group of test data from the test data set as first test data, wherein the amplitude value of the first test data is called a first amplitude value, and the first amplitude value is an amplitude value except the maximum amplitude value in the plurality of amplitude values;
the test data sending device is used for sending the test data set to the calibrated radio frequency signal source;
and the calibration data acquisition device is used for reading data of a frequency spectrograph connected with the radio frequency signal source when the radio frequency signal source loads the first test data, taking the data as calibration data corresponding to the first test data, and traversing the test data to obtain standard data corresponding to the test data.
In a preferred embodiment of the present invention, the calibration apparatus further comprises: calibration order determining means for determining a calibration order of the plurality of sets of test data;
the calibration data obtaining device is further configured to, when the test data except the first test data in the test data set is sequentially loaded by the radio frequency signal source according to the calibration sequence, read data of a spectrometer connected to the radio frequency signal source as calibration data corresponding to the test data.
In a preferred embodiment of the present invention, the calibration apparatus further comprises: the data storage device is used for storing the calibration data and the test data set;
and the data sending device is used for sending the calibration data and the test data set to the radio frequency signal source.
One of the objectives of the present invention is to provide a calibration system for ALC of a radio frequency signal source, the system comprising a calibrated radio frequency signal source, a spectrometer, and a calibration device, wherein the radio frequency signal source is connected to the spectrometer;
the calibration equipment is respectively connected with the radio frequency signal source and the frequency spectrograph;
the calibration apparatus includes: the test data generating device is used for acquiring a plurality of preset frequency values and a plurality of preset amplitude values, and generating a test data set according to the frequency values and the amplitude values, wherein the test data set comprises a plurality of groups of test data, and each group of test data comprises a frequency value and an amplitude value;
the test data selection device is used for extracting a group of test data from the test data set as first test data, wherein the amplitude value of the first test data is called a first amplitude value, and the first amplitude value is an amplitude value except the maximum amplitude value in the plurality of amplitude values;
the test data sending device is used for sending the test data set to the radio frequency signal source;
and the calibration data acquisition device is used for reading data of the frequency spectrograph as calibration data corresponding to the first test data when the radio frequency signal source loads the first test data, and traversing the test data to obtain standard data corresponding to the test data.
The calibration method, the calibration equipment and the calibration system for the ALC of the radio frequency signal source have the advantages that the ALC of the radio frequency signal source is calibrated by setting the amplitude value of the first calibration point at each frequency in the calibration process of the radio frequency signal source to be the amplitude value outside the maximum amplitude value in the plurality of amplitude values, the calibration success rate of the radio frequency signal source is improved while the accuracy of the output signal of the radio frequency signal source is ensured, the cost of manpower and material resources is greatly reduced, the yield is improved, and the index of the radio frequency signal source is ensured and improved.
In order to make the aforementioned and other objects, features and advantages of the invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a block diagram of a calibration system for ALC of a radio frequency signal source according to an embodiment of the present invention;
FIG. 2 is a block diagram of a first embodiment of a calibration apparatus for ALC of a radio frequency signal source according to an embodiment of the present invention;
FIG. 3 is a block diagram of a second embodiment of a calibration apparatus for ALC of a radio frequency signal source according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating a first embodiment of a method for calibrating ALC of a radio frequency signal source according to an embodiment of the present invention;
FIG. 5 is a flowchart of a second embodiment of a method for calibrating ALC of a radio frequency signal source according to an embodiment of the present invention;
FIG. 6 is a flowchart illustrating a method for calibrating ALC with RF signal sources in 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.
As will be appreciated by one skilled in the art, embodiments of the present invention may be embodied as a system, apparatus, method or computer program product. Accordingly, the present disclosure may be embodied in the form of: entirely hardware, entirely software (including firmware, resident software, micro-code, etc.), or a combination of hardware and software.
The principles and spirit of the present invention are explained in detail below with reference to several representative embodiments of the invention.
The invention provides a calibration method, equipment and a system for ALC of a radio frequency signal source, aiming at the technical problems that when ALC of the radio frequency signal source is calibrated in the prior art, an ALC loop is difficult to lock due to too large set power of a first calibration point under each frequency or the time for locking is long, calibration data is not accurate, and the final result is that the output amplitude of a machine is not accurate.
Fig. 1 is a block diagram of a calibration system for ALC of a radio frequency signal source according to an embodiment of the present invention, and referring to fig. 1, the system includes a calibrated radio frequency signal source 100, a spectrometer 200 and a calibration apparatus 300,
wherein, the radio frequency signal source 100 is connected with the frequency spectrograph 200;
the calibration apparatus 300 is connected to the rf signal source 100 and the spectrometer 200, respectively.
In a particular embodiment, the output of the rf signal source 100 is connected to the input of the spectrometer. The radio frequency signal source is of a type such as DSG 3120.
Fig. 2 is a block diagram of a first implementation of a calibration apparatus for ALC of a radio frequency signal source according to an embodiment of the present invention, referring to fig. 2, a calibration apparatus 300 specifically includes:
the test data generating device 301 is configured to obtain a plurality of preset frequency values and a plurality of preset amplitude values, and generate a test data set according to the plurality of frequency values and the plurality of preset amplitude values, where the test data set includes a plurality of sets of test data, and each set of test data includes a frequency value and an amplitude value.
In a particular embodiment, the plurality of frequency values may be, for example, 6GHZ to 12GHZ, incremented by 50MHZ, the amplitude values may be, for example, -15dbm to 25dbm, incremented by 1dbm, and then the set of test data includes a plurality of sets of test data, such as one set of test data being (8GHZ, 12 dbm).
The test data selecting device 302 is configured to extract a group of test data from the test data set as first test data, where an amplitude value of the first test data is referred to as a first amplitude value, and the first amplitude value is an amplitude value other than a maximum amplitude value in the plurality of amplitude values. In a particular embodiment, the plurality of frequency values may be, for example, 6GHZ to 12GHZ, incremented by 50MHZ, the amplitude values may be, for example, -15dbm to 25dbm, incremented by 1dbm, and the first amplitude value of the first test data extracted from the test data set is not 25 dbm.
A test data sending device 303, configured to send the test data set to the radio frequency signal source.
After the radio frequency signal source receives the test data set, different test data can be loaded, for example, the test data (8GHZ, 12dbm) is loaded, and then the frequency of the radio frequency signal source is set to 8GHZ, and the amplitude is set to 12 dbm.
A calibration data obtaining device 304, configured to read data of the spectrometer as calibration data corresponding to the first test data when the radio frequency signal source loads the first test data, and traverse the test data to obtain standard data corresponding to the test data.
That is, when the test data is (8GHZ, 12dbm), the frequency of the radio frequency signal source is set to 8GHZ, and the amplitude is set to 12dbm, and at this time, the data of the spectrometer connected to the radio frequency signal source is the calibration data corresponding to the test data (8GHZ, 12 dbm). In the invention, when ALC calibration needs to be carried out on a radio frequency signal source, first test data is loaded by the radio frequency signal source, and then other test data are traversed until all test data are loaded.
The calibration system for the ALC of the radio frequency signal source, provided by the invention, has the advantages that the ALC calibration is carried out on the radio frequency signal source by setting the amplitude value of the first calibration point at each frequency in the calibration process of the radio frequency signal source to be the amplitude value beyond the maximum amplitude value in the plurality of amplitude values, the accuracy of the output signal of the radio frequency signal source is ensured, and the calibration success rate of the radio frequency signal source is improved.
In other embodiments of the present invention, the first amplitude value may also be set as an amplitude value other than the smallest amplitude value in the plurality of amplitude values, that is, in this embodiment, the plurality of frequency values may be, for example, 6GHZ to 12GHZ, incremented by 50MHZ, the amplitude values may be, for example, 15dbm to 25dbm, incremented by 1dbm, and then the first amplitude value of the first test data extracted from the test data set is not 25dbm and not-15 dbm.
Fig. 3 is a block diagram of a second implementation of the calibration apparatus for ALC of a radio frequency signal source according to an embodiment of the present invention, referring to fig. 3, in the second implementation, the calibration apparatus 300 further includes:
a calibration order determining means 305 for determining a calibration order of the plurality of sets of test data.
The calibration data obtaining device 304 is further configured to, when the test data except the first test data in the test data set is sequentially loaded by the radio frequency signal source according to the calibration sequence, read data of a spectrometer connected to the radio frequency signal source as calibration data corresponding to the test data.
That is, in the second embodiment, when the ALC calibration needs to be performed on the radio frequency signal source, the first test data is loaded by the radio frequency signal source, and then other test data is traversed according to the calibration sequence until all the test data are loaded.
In the present invention, the calibration order may be a variety of orders.
In one embodiment of the invention, the calibration sequence comprises:
the sequence of frequency values in the plurality of sets of test data is: the minimum value from the plurality of frequency values is incremented to the maximum value from the plurality of frequency values or the maximum value from the plurality of frequency values is decremented to the minimum value from the plurality of frequency values.
In this embodiment, the plurality of frequency values may be, for example, 6GHZ to 7GHZ, incremented by 1GHZ, the amplitude values may be, for example, -15dbm to-5 dbm, incremented by 5dbm, and the test data are (6GHZ, -15dbm), (6GHZ, -10dbm), (6GHZ, -5dbm), (7GHZ, -15dbm), (7GHZ, -10dbm), (7GHZ, -5dbm), respectively. When the calibration order is incremented from the minimum of the plurality of frequency values to the maximum of the plurality of frequency values, one combination of loading orders for the test data is (6GHZ, -10dbm), (6GHZ, -15dbm), (6GHZ, -5dbm), (7GHZ, -15dbm), (7GHZ, -10dbm), (7GHZ, -5dbm), by way of example only. When the calibration order is decreasing from the maximum value to the minimum value, the embodiments also include various combinations, which are not described herein.
In one embodiment of the present invention, the order of the amplitude values in the plurality of sets of test data is: incrementing from the first amplitude value to a maximum of the plurality of amplitude values and then decrementing from the first amplitude value to a minimum of the plurality of amplitude values or decrementing from the first amplitude value to a minimum of the plurality of amplitude values and then incrementing from the first amplitude value to a maximum of the plurality of amplitude values.
In this embodiment, the plurality of frequency values may be, for example, 6GHZ to 7GHZ, incremented by 1GHZ, the amplitude values may be, for example, -15dbm to-5 dbm, incremented by 5dbm, and the test data are (6GHZ, -15dbm), (6GHZ, -10dbm), (6GHZ, -5dbm), (7GHZ, -15dbm), (7GHZ, -10dbm), (7GHZ, -5dbm), respectively. When the calibration order is from increasing from the first amplitude value to a maximum of the plurality of amplitude values and then decreasing from the first amplitude value to a minimum of the plurality of amplitude values, then one combination is, for example, (6GHZ, -10dbm), (7GHZ, -5dbm), (6GHZ, -15dbm), (7GHZ, -10dbm), (6GHZ, -5dbm), (7GHZ, -15 dbm).
Referring to fig. 3, in the second embodiment, the calibration apparatus 300 further includes:
a data storage 306 for storing the calibration data and the test data set;
a data sending device 307, configured to send the calibration data and the test data set to the radio frequency signal source. And then writing the data into a FLASH of a radio frequency signal source.
The calibration equipment for the ALC of the radio frequency signal source provided by the invention has the advantages that the ALC calibration is carried out on the radio frequency signal source by changing the loading sequence of the set frequency and the amplitude, the amplitude value of the first calibration point at each frequency in the calibration process of the radio frequency signal source is ensured to be set to be the amplitude value out of the maximum amplitude value and the minimum amplitude value in a plurality of amplitude values, the accuracy of the output signal of the radio frequency signal source is ensured, and meanwhile, the success rate of the calibration of the radio frequency signal source is improved.
Furthermore, although in the above detailed description several unit modules of the system are mentioned, this division is not mandatory only. Indeed, the features and functions of two or more of the units described above may be embodied in one unit, according to embodiments of the invention. Also, the features and functions of one unit described above may be further divided into embodiments by a plurality of units. The terms "module" and "unit" used above may be software and/or hardware that realizes a predetermined function. While the modules described in the following embodiments are preferably implemented in software, implementations in hardware, or a combination of software and hardware are also possible and contemplated.
Having described the coordination of the exemplary embodiments of the present invention, the method of the exemplary embodiments of the present invention will now be described with reference to the accompanying drawings. The implementation of the method can be referred to the above overall implementation, and repeated details are not repeated.
Fig. 4 is a flowchart of a method for calibrating ALC of a radio frequency signal source according to an embodiment of the present invention, referring to fig. 4, the method includes:
s101: acquiring a plurality of preset frequency values and a plurality of amplitude values;
s102: and generating a test data set according to the frequency values and the amplitude values, wherein the test data set comprises a plurality of groups of test data, and each group of test data comprises a frequency value and an amplitude value.
In a particular embodiment, the plurality of frequency values may be, for example, 6GHZ to 12GHZ, incremented by 50MHZ, the amplitude values may be, for example, -15dbm to 25dbm, incremented by 1dbm, and then the set of test data includes a plurality of sets of test data, such as one set of test data being (8GHZ, 12 dbm).
S103: extracting a group of test data from the test data set as first test data, wherein amplitude values of the first test data are called first amplitude values, and the first amplitude values are amplitude values except for the maximum amplitude value in the plurality of amplitude values. In a particular embodiment, the plurality of frequency values may be, for example, 6GHZ to 12GHZ, incremented by 50MHZ, the amplitude values may be, for example, -15dbm to 25dbm, incremented by 1dbm, and the first amplitude value of the first test data extracted from the test data set is not 25 dbm.
S104: and sending the test data set to the radio frequency signal source.
After the radio frequency signal source receives the test data set, different test data can be loaded, for example, the test data (8GHZ, 12dbm) is loaded, and then the frequency of the radio frequency signal source is set to 8GHZ, and the amplitude is set to 12 dbm.
S105: reading data of the frequency spectrograph as calibration data corresponding to the first test data when the radio frequency signal source loads the first test data;
s106: and traversing the test data to obtain standard data corresponding to the test data.
That is, when the test data is (8GHZ, 12dbm), the frequency of the radio frequency signal source is set to 8GHZ, and the amplitude is set to 12dbm, and at this time, the data of the spectrometer connected to the radio frequency signal source is the calibration data corresponding to the test data (8GHZ, 12 dbm). In the invention, when ALC calibration needs to be carried out on a radio frequency signal source, first test data is loaded by the radio frequency signal source, and then other test data are traversed until all test data are loaded.
The method for calibrating the ALC of the radio frequency signal source provided by the invention has the advantages that the ALC calibration is carried out on the radio frequency signal source by setting the amplitude value of the first calibration point at each frequency in the calibration process of the radio frequency signal source to be the amplitude value beyond the maximum amplitude value in the plurality of amplitude values, the accuracy of the output signal of the radio frequency signal source is ensured, and meanwhile, the calibration success rate of the radio frequency signal source is improved.
In other embodiments of the present invention, the first amplitude value may also be set as an amplitude value other than the smallest amplitude value in the plurality of amplitude values, that is, in this embodiment, the plurality of frequency values may be, for example, 6GHZ to 12GHZ, incremented by 50MHZ, the amplitude values may be, for example, 15dbm to 25dbm, incremented by 1dbm, and then the first amplitude value of the first test data extracted from the test data set is not 25dbm and not-15 dbm.
Fig. 5 is a flowchart of a second implementation manner of a method for calibrating ALC of a radio frequency signal source according to an embodiment of the present invention, referring to fig. 5, in the second implementation manner, the method includes:
s201: acquiring a plurality of preset frequency values and a plurality of amplitude values;
s202: and generating a test data set according to the frequency values and the amplitude values, wherein the test data set comprises a plurality of groups of test data, and each group of test data comprises a frequency value and an amplitude value.
S203: extracting a group of test data from the test data set as first test data, wherein amplitude values of the first test data are called first amplitude values, and the first amplitude values are amplitude values except for the maximum amplitude value in the plurality of amplitude values.
S204: and sending the test data set to the radio frequency signal source.
S205: reading data of the frequency spectrograph as calibration data corresponding to the first test data when the radio frequency signal source loads the first test data;
s206: determining a calibration order for the plurality of sets of test data.
S207: and when the test data except the first test data in the test data set are sequentially loaded by the radio frequency signal source according to the calibration sequence, data of a frequency spectrograph connected with the radio frequency signal source are used as calibration data corresponding to the test data.
S208: and storing the calibration data and the test data set, and sending the calibration data and the test data set to the radio frequency signal source. And then writing the data into a FLASH of a radio frequency signal source.
That is, in the second embodiment, when the ALC calibration needs to be performed on the radio frequency signal source, the first test data is loaded by the radio frequency signal source, and then other test data is traversed according to the calibration sequence until all the test data are loaded.
In the present invention, the calibration order may be a variety of orders.
In one embodiment of the invention, the calibration sequence comprises:
the sequence of frequency values in the plurality of sets of test data is: the minimum value from the plurality of frequency values is incremented to the maximum value from the plurality of frequency values or the maximum value from the plurality of frequency values is decremented to the minimum value from the plurality of frequency values.
In this embodiment, the plurality of frequency values may be, for example, 6GHZ to 7GHZ, incremented by 1GHZ, the amplitude values may be, for example, -15dbm to-5 dbm, incremented by 5dbm, and the test data are (6GHZ, -15dbm), (6GHZ, -10dbm), (6GHZ, -5dbm), (7GHZ, -15dbm), (7GHZ, -10dbm), (7GHZ, -5dbm), respectively. When the calibration order is incremented from the minimum of the plurality of frequency values to the maximum of the plurality of frequency values, one combination of loading orders for the test data is (6GHZ, -10dbm), (6GHZ, -15dbm), (6GHZ, -5dbm), (7GHZ, -15dbm), (7GHZ, -10dbm), (7GHZ, -5dbm), by way of example only. When the calibration order is decreasing from the maximum value to the minimum value, the embodiments also include various combinations, which are not described herein.
In one embodiment of the present invention, the order of the amplitude values in the plurality of sets of test data is: incrementing from the first amplitude value to a maximum of the plurality of amplitude values and then decrementing from the first amplitude value to a minimum of the plurality of amplitude values or decrementing from the first amplitude value to a minimum of the plurality of amplitude values and then incrementing from the first amplitude value to a maximum of the plurality of amplitude values.
In this embodiment, the plurality of frequency values may be, for example, 6GHZ to 7GHZ, incremented by 1GHZ, the amplitude values may be, for example, -15dbm to-5 dbm, incremented by 5dbm, and the test data are (6GHZ, -15dbm), (6GHZ, -10dbm), (6GHZ, -5dbm), (7GHZ, -15dbm), (7GHZ, -10dbm), (7GHZ, -5dbm), respectively. When the calibration order is from increasing from the first amplitude value to a maximum of the plurality of amplitude values and then decreasing from the first amplitude value to a minimum of the plurality of amplitude values, then one combination is, for example, (6GHZ, -10dbm), (7GHZ, -5dbm), (6GHZ, -15dbm), (7GHZ, -10dbm), (6GHZ, -5dbm), (7GHZ, -15 dbm).
The ALC calibration method for the radio frequency signal source provided by the invention has the advantages that the ALC calibration is carried out on the radio frequency signal source by changing the loading sequence of the set frequency and the amplitude, the amplitude value of the first calibration point at each frequency in the calibration process of the radio frequency signal source is ensured to be set as the amplitude value out of the maximum amplitude value and the minimum amplitude value in the plurality of amplitude values, the accuracy of the output signal of the radio frequency signal source is ensured, and the success rate of the calibration of the radio frequency signal source is improved.
It should be noted that while the operations of the method of the present invention are depicted in the drawings in a particular order, this does not require or imply that the operations must be performed in this particular order, or that all of the illustrated operations must be performed, to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions.
The technical solution of the present invention will be described in detail with reference to specific examples. FIG. 6 is a flowchart of a method for calibrating ALC of a radio frequency signal source in an embodiment of the present invention, where the radio frequency signal source is model number DSG 3120. And connecting the output end of the radio frequency signal source to the input end of the frequency spectrograph.
S1: calibration of the ALC is started.
S2: the frequency points are cycled and are sequentially increased from 6GHZ to 12 GHZ. That is, it is finished by firstly setting the frequency 6GHZ of the DSG3120 and secondly setting the frequency to be increased by 50MHZ more than the last frequency until the set frequency reaches 12 GHZ.
S3: and (4) performing amplitude circulation, wherein the amplitude is increased from-10 dbm to 25dbm in sequence and then decreased from-10 dbm to-15 dbm in sequence. That is, the ALC amplitude of DSG3120 is first set to-10 dbm, then the ALC amplitude is set to 1dbm increase from the last ALC amplitude until 25dbm, after the amplitude has increased to 25dbm, the ALC amplitude is set to-11 dbm, and the ALC amplitude is set to 1dbm decrease from the last ALC amplitude until-15 dbm.
S4: performing amplitude detection, judging whether the amplitude setting value is within a preset range (namely-15 dbm to 25dbm), if so, executing S5, if not, indicating that the power point is circulated, performing calibration for writing a frequency point, and executing step S2;
s5: after the amplitude judgment is completed, whether the frequency is within the range (i.e., 6GHZ to 12GHZ) is judged, and if so, the cyclic calibration of the next frequency point is performed, and the process returns to the step of S2. If the frequency range is not out of the range, the last frequency point is reached, that is, all the frequency points are calibrated.
S6: calibration data is acquired and saved.
S7: and writing the ALC calibration data into a FLASH of the radio frequency signal source, and completing ALC calibration.
That is, in this particular embodiment, after initialization of the RF source and spectrometer at the beginning of ALC calibration, a cyclic incremental setting of the instrument frequency is performed, at each frequency point, incrementally increasing from-10 dbm to 25dbm, then back to-11 dbm, and decrementing to-15 dbm, and then an output power measurement is taken. Calibration of the ALC is complete until all frequency point cycle tests are complete.
The invention optimizes the setting sequence of the amplitude points, so that the ALC avoids the problem that the first point may not be locked due to too large set power, thereby affecting the inaccuracy of calibration data, and the final result is the inaccuracy of the output amplitude of the machine. In the prior art, the amplitude setting is monotonically decreased from large to small according to a certain step, and under the setting of a first amplitude point of 25dbm, the amplitude of the ALC is very large, and the ALC is difficult to lock and even cannot lock, so that the calibration fails. In the embodiment of the invention, the setting amplitude is monotonically increased to 25dbm from the middle value of-10 dbm according to a certain unit, then returns to-10 dbm, and is monotonically decreased to-15 dbm according to a certain unit, so that the problem of difficult ALC locking caused by too large first setting point is avoided, and the success rate of calibration is improved.
In summary, according to the calibration method, the calibration device and the calibration system for the ALC of the radio frequency signal source provided by the invention, the ALC calibration is performed on the radio frequency signal source by changing the loading sequence of the set frequency and the amplitude, so that the amplitude value of the first calibration point at each frequency in the calibration process of the radio frequency signal source is ensured to be set as the amplitude value out of the maximum amplitude value and the minimum amplitude value in the plurality of amplitude values, and the calibration success rate of the radio frequency signal source is improved while the accuracy of the output signal of the radio frequency signal source is ensured.
Improvements to a technology can clearly be distinguished between hardware improvements (e.g. improvements to the circuit structure of diodes, transistors, switches, etc.) and software improvements (improvements to the process flow). However, as technology advances, many of today's process flow improvements have been seen as direct improvements in hardware circuit architecture. Designers almost always obtain the corresponding hardware circuit structure by programming an improved method flow into the hardware circuit. Thus, it cannot be said that an improvement in the process flow cannot be realized by hardware physical modules. For example, a Programmable Logic Device (PLD), such as a Field Programmable Gate Array (FPGA), is an integrated circuit whose Logic functions are determined by programming the Device by a user. A digital system is "integrated" on a PLD by the designer's own programming without requiring the chip manufacturer to design and fabricate application-specific integrated circuit chips. Furthermore, nowadays, instead of manually making an Integrated Circuit chip, such Programming is often implemented by "logic compiler" software, which is similar to a software compiler used in program development and writing, but the original code before compiling is also written by a specific Programming Language, which is called Hardware Description Language (HDL), and HDL is not only one but many, such as abel (advanced Boolean Expression Language), ahdl (alternate Language Description Language), traffic, pl (core unified Programming Language), HDCal, JHDL (Java Hardware Description Language), langue, Lola, HDL, laspam, hardbyscript Description Language (vhr Description Language), and the like, which are currently used by Hardware compiler-software (Hardware Description Language-software). It will also be apparent to those skilled in the art that hardware circuitry that implements the logical method flows can be readily obtained by merely slightly programming the method flows into an integrated circuit using the hardware description languages described above.
The controller may be implemented in any suitable manner, for example, the controller may take the form of, for example, a microprocessor or processor and a computer-readable medium storing computer-readable program code (e.g., software or firmware) executable by the (micro) processor, logic gates, switches, an Application Specific Integrated Circuit (ASIC), a programmable logic controller, and an embedded microcontroller, examples of which include, but are not limited to, the following microcontrollers: ARC 625D, Atmel AT91SAM, Microchip PIC18F26K20, and Silicone Labs C8051F320, the memory controller may also be implemented as part of the control logic for the memory.
Those skilled in the art will also appreciate that, in addition to implementing the controller as pure computer readable program code, the same functionality can be implemented by logically programming method steps such that the controller is in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Such a controller may thus be considered a hardware component, and the means included therein for performing the various functions may also be considered as a structure within the hardware component. Or even means for performing the functions may be regarded as being both a software module for performing the method and a structure within a hardware component.
The systems, devices, modules or units illustrated in the above embodiments may be implemented by a computer chip or an entity, or by a product with certain functions.
For convenience of description, the above devices are described as being divided into various units by function, and are described separately. Of course, the functionality of the units may be implemented in one or more software and/or hardware when implementing the present application.
From the above description of the embodiments, it is clear to those skilled in the art that the present application can be implemented by software plus necessary general hardware platform. Based on such understanding, the technical solutions of the present application may be essentially or partially implemented in the form of software products, which may be stored in a storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and include instructions for causing a computer system (which may be a personal computer, a server, or a network system, etc.) to execute the methods described in the embodiments or some parts of the embodiments of the present application.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The application is operational with numerous general purpose or special purpose computing system environments or configurations. For example: personal computers, server computers, hand-held or portable systems, tablet-type systems, multiprocessor systems, microprocessor-based systems, set top boxes, programmable consumer electronics systems, network PCs, minicomputers, mainframe computers, distributed computing environments that include any of the above systems or systems, and the like.
The application may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The application may also be practiced in distributed computing environments where tasks are performed by remote processing systems that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage systems.
While the present application has been described with examples, those of ordinary skill in the art will appreciate that there are numerous variations and permutations of the present application without departing from the spirit of the application, and it is intended that the appended claims encompass such variations and permutations without departing from the spirit of the application.
Claims (5)
1. A calibration method for ALC of a radio frequency signal source, characterized in that the method comprises:
acquiring a plurality of preset frequency values and a plurality of preset amplitude values;
generating a test data set according to the frequency values and the amplitude values, wherein the test data set comprises a plurality of groups of test data, and each group of test data comprises a frequency value and an amplitude value;
extracting a group of test data from the test data set as first test data, wherein amplitude values of the first test data are called first amplitude values, and the first amplitude values are amplitude values except for the maximum amplitude value in the plurality of amplitude values or are amplitude values except for the minimum amplitude value in the plurality of amplitude values;
sending the test data set to a calibrated radio frequency signal source;
reading data of a frequency spectrograph connected with the radio frequency signal source when the radio frequency signal source loads the first test data, and taking the data as calibration data corresponding to the first test data;
determining a calibration order for the plurality of sets of test data; wherein the calibration sequence comprises:
the sequence of frequency values in the plurality of sets of test data is: incrementing from a minimum value of the plurality of frequency values to a maximum value of the plurality of frequency values or decrementing from a maximum value of the plurality of frequency values to a minimum value of the plurality of frequency values;
the order of the amplitude values in the plurality of sets of test data is: incrementing from the first amplitude value to a maximum of the plurality of amplitude values and then decrementing from the first amplitude value to a minimum of the plurality of amplitude values or decrementing from the first amplitude value to a minimum of the plurality of amplitude values and then incrementing from the first amplitude value to a maximum of the plurality of amplitude values;
and according to the calibration sequence, reading data of a frequency spectrograph connected with the radio frequency signal source when the radio frequency signal source sequentially loads other test data except the first test data in the test data set as calibration data corresponding to the other test data.
2. The method of claim 1, further comprising saving the calibration data and a set of test data, and sending the calibration data and the set of test data to the radio frequency signal source.
3. A calibration apparatus for ALC of a radio frequency signal source, said calibration apparatus comprising:
the test data generating device is used for acquiring a plurality of preset frequency values and a plurality of preset amplitude values, and generating a test data set according to the frequency values and the amplitude values, wherein the test data set comprises a plurality of groups of test data, and each group of test data comprises a frequency value and an amplitude value;
the test data selection device is used for extracting a group of test data from the test data set as first test data, wherein amplitude values of the first test data are called first amplitude values, and the first amplitude values are amplitude values outside the maximum amplitude values in the amplitude values or the first amplitude values outside the minimum amplitude values in the amplitude values;
the test data sending device is used for sending the test data set to the calibrated radio frequency signal source;
calibration order determining means for determining a calibration order of the plurality of sets of test data; wherein the calibration sequence comprises:
the sequence of frequency values in the plurality of sets of test data is: incrementing from a minimum value of the plurality of frequency values to a maximum value of the plurality of frequency values or decrementing from a maximum value of the plurality of frequency values to a minimum value of the plurality of frequency values;
the order of the amplitude values in the plurality of sets of test data is: incrementing from the first amplitude value to a maximum of the plurality of amplitude values and then decrementing from the first amplitude value to a minimum of the plurality of amplitude values or decrementing from the first amplitude value to a minimum of the plurality of amplitude values and then incrementing from the first amplitude value to a maximum of the plurality of amplitude values;
the calibration data acquisition device is used for reading data of a frequency spectrograph connected with the radio frequency signal source when the radio frequency signal source loads the first test data, and the data is used as calibration data corresponding to the first test data; and according to the calibration sequence, reading data of a frequency spectrograph connected with the radio frequency signal source when the radio frequency signal source sequentially loads other test data except the first test data in the test data set as calibration data corresponding to the other test data.
4. The calibration device of claim 3, further comprising:
the data storage device is used for storing the calibration data and the test data set;
and the data sending device is used for sending the calibration data and the test data set to the radio frequency signal source.
5. A calibration system for ALC of a radio frequency signal source, said system comprising a radio frequency signal source to be calibrated, a spectrometer and a calibration device according to any of claims 3 to 4,
the radio frequency signal source is connected with the frequency spectrograph;
the calibration equipment is respectively connected with the radio frequency signal source and the frequency spectrograph;
the calibration apparatus includes: the test data generating device is used for acquiring a plurality of preset frequency values and a plurality of preset amplitude values, and generating a test data set according to the frequency values and the amplitude values, wherein the test data set comprises a plurality of groups of test data, and each group of test data comprises a frequency value and an amplitude value;
the test data selection device is used for extracting a group of test data from the test data set as first test data, wherein amplitude values of the first test data are called first amplitude values, and the first amplitude values are amplitude values outside the maximum amplitude values in the amplitude values or the first amplitude values outside the minimum amplitude values in the amplitude values;
the test data sending device is used for sending the test data set to the radio frequency signal source;
calibration order determining means for determining a calibration order of the plurality of sets of test data; wherein the calibration sequence comprises:
the sequence of frequency values in the plurality of sets of test data is: incrementing from a minimum value of the plurality of frequency values to a maximum value of the plurality of frequency values or decrementing from a maximum value of the plurality of frequency values to a minimum value of the plurality of frequency values;
the order of the amplitude values in the plurality of sets of test data is: incrementing from the first amplitude value to a maximum of the plurality of amplitude values and then decrementing from the first amplitude value to a minimum of the plurality of amplitude values or decrementing from the first amplitude value to a minimum of the plurality of amplitude values and then incrementing from the first amplitude value to a maximum of the plurality of amplitude values;
a calibration data obtaining device, configured to read, when the radio frequency signal source loads the first test data, data of the spectrometer as calibration data corresponding to the first test data; and according to the calibration sequence, reading data of a frequency spectrograph connected with the radio frequency signal source when the radio frequency signal source sequentially loads other test data except the first test data in the test data set as calibration data corresponding to the other test data.
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