CN112557746A - Power level correction method and system for digital mobile communication comprehensive tester - Google Patents
Power level correction method and system for digital mobile communication comprehensive tester Download PDFInfo
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- 238000010295 mobile communication Methods 0.000 title claims abstract description 189
- 238000012937 correction Methods 0.000 title claims abstract description 39
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- 238000005259 measurement Methods 0.000 claims abstract description 54
- 238000001228 spectrum Methods 0.000 claims abstract description 50
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/16—Spectrum analysis; Fourier analysis
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- H04M—TELEPHONIC COMMUNICATION
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Abstract
The invention relates to the technical field of communication measurement, in particular to a method and a system for correcting power level of a digital mobile communication comprehensive tester, which comprises the following steps: step A, testing the line loss of a signal transmission cable by using a high-frequency signal generator and a power meter; step B, testing the power output error of the digital mobile communication comprehensive tester by using a spectrum analyzer; step C, testing the level measurement indicating value error of the digital mobile communication comprehensive tester by using a high-frequency signal generator; d, calculating a corrected value of the power output error and the level measurement indicating value error of the digital mobile communication comprehensive tester; and E, writing the power output error correction value and the level measurement indication error correction value into the digital mobile communication comprehensive tester. The invention can quickly finish the correction of the power output and the level measurement value of the digital mobile communication comprehensive tester, and effectively improve the actual accuracy of the digital mobile communication comprehensive tester when detecting the mobile terminal.
Description
Technical Field
The invention relates to the technical field of communication measurement, in particular to a power level correction method and a power level correction system for a digital mobile communication comprehensive tester.
Background
The digital mobile communication comprehensive tester is a key detection device for judging whether each mobile phone reaches the factory standard, and qualified mobile phones can be sold after being judged by the comprehensive tester. However, when a metering mechanism performs routine metering calibration on an enterprise comprehensive tester every year, the power output and level measurement indication values of the comprehensive tester with a large proportion are often found to be out of tolerance, and the mobile phone delivery quality can be misjudged if the indexes of the tester do not reach the standard. Therefore, the power output and level measurement indicating value of the digital mobile communication comprehensive tester with the out-of-tolerance condition must be corrected, and the problem that the power output and level measurement indicating value are out-of-tolerance is solved.
In the prior art, when the digital mobile communication comprehensive tester is used, only the line loss value of a signal transmission cable is tested, but errors of power output and level measurement of the digital mobile communication comprehensive tester are not corrected, so that the power output and level measurement values of the digital mobile communication comprehensive tester passing through the signal transmission cable are inaccurate, and the accuracy of the digital mobile communication comprehensive tester in detecting a mobile terminal is influenced.
Disclosure of Invention
The invention provides a method and a system for correcting the power level of a digital mobile communication comprehensive tester aiming at the problems in the prior art, which can quickly finish the correction of the power output and the level measurement value of the digital mobile communication comprehensive tester and effectively improve the accuracy of the digital mobile communication comprehensive tester for detecting a mobile terminal; the functions of signal emission, power reading, data storage and the like of each instrument are automatically realized, the automatic production operation is facilitated, and the working efficiency is effectively improved.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention also provides a method for correcting the power level of the digital mobile communication comprehensive tester, which comprises the following steps:
step A, testing the line loss of a signal transmission cable by using a high-frequency signal generator and a power meter;
step B, testing the power output error of the digital mobile communication comprehensive tester by using a spectrum analyzer;
step C, testing the level measurement indicating value error of the digital mobile communication comprehensive tester by using a high-frequency signal generator;
d, calculating a corrected value of the power output error and the level measurement indicating value error of the digital mobile communication comprehensive tester;
and E, writing the power output error correction value and the level measurement indication error correction value into the digital mobile communication comprehensive tester.
Wherein, the step a of testing the line loss of the signal transmission cable using the high frequency signal generator and the power meter further comprises the steps of:
step A1, the main control computer is respectively connected with the high-frequency signal generator and the power meter through a USB communication cable or a GPIB interface card, and a signal transmission cable a is connected between the output port of the high-frequency signal generator and the input port of the power meter;
step A2, the main control computer controls the orderly output power of the high-frequency signal generator to be fixed at AsAnd the frequency is f (where f means f)1，f2…fnEqual multiple different frequencies), the power meter tests and obtains the actual value A of the input power under the corresponding frequency set value frpAnd returning to the main control computer, wherein the main control computer records and stores the frequency set value f and the power set value A of the high-frequency signal generatorsAnd the actual value A of the power measured by the power meterrp。
Wherein, the step B of testing the power output error of the digital mobile communication comprehensive tester by using the spectrum analyzer further comprises the following steps:
step B1, the main control computer is respectively connected with the spectrum analyzer and the digital mobile communication comprehensive tester in a communication way through a USB communication cable or a GPIB interface card, and a signal transmission cable a is connected between the output port of the digital mobile communication comprehensive tester and the input port of the spectrum analyzer;
step B2, crystal oscillator synchronization is carried out between the spectrum analyzer and the digital mobile communication comprehensive tester, the crystal oscillator output port of the spectrum analyzer is connected to the crystal oscillator input port of the digital mobile communication comprehensive tester through a BNC connecting line, and the digital mobile communication comprehensive tester is controlled by the master control computer to open the external crystal oscillator synchronization function;
step B3, the main control computer controls the digital mobile communication comprehensive tester to fix the orderly output power to AsAnd the frequency is f (where f means f)1，f2…fnEqual multiple different frequencies), and the spectrum analyzer tests and obtains the actual value A of the input power under the corresponding frequency set value fraAnd returning to the main control computer, wherein the main control computer records and stores the frequency set value f and the output power set value A of the digital mobile communication comprehensive testersAnd the actual power value A measured by the spectrum analyzerra。
Wherein, the step C of testing the level measurement indicating value error of the digital mobile communication comprehensive tester by using the high-frequency signal generator further comprises the following steps:
step C1, the main control computer is respectively connected with the high-frequency signal generator and the digital mobile communication integrated tester in a communication way through a USB communication cable or a GPIB interface card, and a signal transmission cable a is connected between the output port of the high-frequency signal generator and the input port of the digital mobile communication integrated tester;
step C2, carrying out crystal oscillator synchronization between the high-frequency signal generator and the digital mobile communication comprehensive tester, connecting the crystal oscillator output port of the high-frequency signal generator to the crystal oscillator input port of the digital mobile communication comprehensive tester through a BNC connecting line, and controlling the digital mobile communication comprehensive tester to open the external crystal oscillator synchronization function by the master control computer;
step C3, the main control computer controls the orderly output power of the high-frequency signal generator to be fixed at AsAnd the frequency is f (where f means f)1，f2…fnEqual multiple different frequencies), the digital mobile communication comprehensive tester is set at the corresponding frequencyTesting at the value f to obtain the actual value A of the input powerrmAnd returning to the main control computer, wherein the main control computer records and stores the frequency set value f and the output power set value A of the high-frequency signal generatorsAnd power indicated value A measured by digital mobile communication comprehensive testerrm。
In the step E, the specific method for writing the power output error correction value and the level measurement indication error correction value into the digital mobile communication comprehensive tester includes: the main control computer is in communication connection with the digital mobile communication comprehensive tester through a USB communication cable or a GPIB interface card, and writes a power output error correction value and a level measurement indication error correction value of an additional or non-additional line loss value and corresponding frequency into a line loss correction setting frame of the digital mobile communication comprehensive tester according to the selection of a user, so that the power output and the level measurement indication value of the digital mobile communication comprehensive tester are corrected.
In the step a2, the result of subtracting the power set value of the high-frequency signal generator from the actual power value measured by the power meter at different frequencies is the line loss value of the signal transmission cable a at the corresponding electrical signal frequency.
Wherein, in the step B3, the actual power value A measured by the spectrum analyzerraSubtracting the set value A of the output power of the digital mobile communication synthesizersThe difference value of (a) is the superposition of the output power error value of the digital mobile communication comprehensive tester and the line loss value of the signal transmission cable a.
In step C3, the digital mobile communication integrated tester measures the power indication value armSubtracting the set value A of the output power of the high-frequency signal generatorsThe difference value of (a) is the superposition of the level measurement indicating value error of the digital mobile communication comprehensive tester and the line loss value of the signal transmission cable a.
The invention also provides a power level correction system of the digital mobile communication comprehensive tester, which comprises a main control computer, and the digital mobile communication comprehensive tester, a high-frequency signal generator, a power meter and a frequency spectrum analyzer which are all in signal connection with the main control computer;
the high-frequency signal generator and the power meter are used for testing the line loss of the signal transmission cable;
the spectrum analyzer is used for testing the power output error of the digital mobile communication comprehensive tester;
the high-frequency signal generator is used for testing the level measurement indicating value error of the digital mobile communication comprehensive tester;
and the main control computer calculates the corrected value of the power output error and the level measurement indicating value error of the digital mobile communication comprehensive tester, and writes the power output error corrected value and the level measurement indicating value error corrected value with or without line loss value into the digital mobile communication comprehensive tester according to the selection of a user to correct the power output and the level measurement indicating value of the digital mobile communication comprehensive tester.
The power level correction system of the digital mobile communication comprehensive tester further comprises a signal transmission cable a, a USB communication cable, a GPIB interface card and a BNC connecting wire.
When the high-frequency signal generator and the power meter test the line loss of the signal transmission cable, the main control computer is respectively in communication connection with the high-frequency signal generator and the power meter through a USB communication cable or a GPIB interface card, and the signal transmission cable a is connected between the output port of the high-frequency signal generator and the input port of the power meter;
when the spectrum analyzer tests the power output error of the digital mobile communication comprehensive tester, the main control computer is respectively in communication connection with the spectrum analyzer and the digital mobile communication comprehensive tester through a USB communication cable or a GPIB interface card, and a signal transmission cable a is connected between the output port of the digital mobile communication comprehensive tester and the input port of the spectrum analyzer; performing crystal oscillator synchronization between the spectrum analyzer and the digital mobile communication comprehensive tester, connecting a crystal oscillator output port of the spectrum analyzer to a crystal oscillator input port of the digital mobile communication comprehensive tester through a BNC (bayonet nut connector) connecting line, and controlling the digital mobile communication comprehensive tester to open an external crystal oscillator synchronization function by the master control computer;
when the high-frequency signal generator tests the level measurement indication error of the digital mobile communication comprehensive tester, the main control computer is respectively in communication connection with the high-frequency signal generator and the digital mobile communication comprehensive tester through a USB communication cable or a GPIB interface card, and a signal transmission cable a is connected between the output port of the high-frequency signal generator and the input port of the digital mobile communication comprehensive tester; the high-frequency signal generator and the digital mobile communication comprehensive tester are in crystal oscillator synchronization, the output port of the crystal oscillator of the high-frequency signal generator is connected to the input port of the crystal oscillator of the digital mobile communication comprehensive tester through a BNC connecting wire, and the master control computer controls the digital mobile communication comprehensive tester to open the external crystal oscillator synchronization function.
The invention has the beneficial effects that:
the method for correcting the power level of the digital mobile communication comprehensive tester can quickly finish the correction of the power output and the level measurement value of the digital mobile communication comprehensive tester, and effectively improves the accuracy of the digital mobile communication comprehensive tester for detecting the mobile terminal; the power level correction system of the digital mobile communication comprehensive tester automatically realizes the functions of signal transmission, power reading, data storage and the like of each instrument, is convenient for automatic production operation, and effectively improves the working efficiency.
Drawings
FIG. 1 is a flow chart of a method for correcting power level of a digital mobile communication integrated tester according to the present invention.
Fig. 2 is a schematic diagram illustrating a case where the line loss of the signal transmission cable is tested by using the high frequency signal generator and the power meter according to the present invention.
Fig. 3 is a schematic diagram of the present invention when a spectrum analyzer is used to test the power output error of the digital mobile communication integrated tester.
Fig. 4 is a schematic diagram of the digital mobile communication integrated tester for testing level measurement indicating value error by using the high-frequency signal generator according to the 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 of the present invention without any inventive step, are within the scope of the present invention. It is to be understood that the drawings are provided solely for the purposes of reference and illustration and are not intended as a definition of the limits of the invention. The connection relationships shown in the drawings are for clarity of description only and do not limit the manner of connection.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It should also be noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; either mechanically or electrically, and may be internal to both elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
It should be noted that in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Example 1
A method for correcting power level of a digital mobile communication comprehensive tester comprises the following steps:
step a, as shown in fig. 2, testing the line loss of the signal transmission cable by using a high-frequency signal generator and a power meter;
step B, as shown in FIG. 3, testing the power output error of the digital mobile communication comprehensive tester by using a spectrum analyzer;
step C, as shown in FIG. 4, testing the level measurement indication error of the digital mobile communication comprehensive tester by using the high-frequency signal generator;
d, calculating a corrected value of the power output error and the level measurement indicating value error of the digital mobile communication comprehensive tester;
and E, writing the power output error correction value and the level measurement indication error correction value into the digital mobile communication comprehensive tester.
Particularly, the method can quickly finish the correction of the power output and the level measurement value of the digital mobile communication comprehensive tester, and effectively improve the accuracy of the digital mobile communication comprehensive tester for detecting the mobile terminal.
In the method for correcting a power level of a digital mobile communication integrated tester according to embodiment 1, the step a of testing a line loss of a signal transmission cable by using a high-frequency signal generator and a power meter further includes the following steps:
step A1, the main control computer is respectively connected with the high-frequency signal generator and the power meter through a USB communication cable or a GPIB interface card, and a signal transmission cable a is connected between the output port of the high-frequency signal generator and the input port of the power meter;
step A2, the main control computer controls the orderly output power of the high-frequency signal generator to be fixed at AsAnd the frequency is f (where f means f)1，f2…fnEtc. multiple different frequencies), such as sine wave signals with signal power of 0dBm and frequencies of 1GHz, 2GHz, 3GHz, 4GHz, 5GHz and 6GHz, the power meter tests under corresponding frequency setting values to obtain the actual value a of the input powerrpAnd returning to the main control computer, wherein the main control computer records and stores the frequency set value f and the power set value A of the high-frequency signal generatorsAnd the actual value A of the power measured by the power meterrp。
Specifically, the result of subtracting the power set value of the high-frequency signal generator from the actual power value measured by the power meter at different frequencies in step a2 is the line loss value of the signal transmission cable a at the corresponding electrical signal frequency;
in the method for correcting the power level of the integrated digital mobile communication tester in this embodiment 1, the step B of testing the power output error of the integrated digital mobile communication tester by using the spectrum analyzer further includes the following steps:
step B1, the main control computer is respectively connected with the spectrum analyzer and the digital mobile communication comprehensive tester in a communication way through a USB communication cable or a GPIB interface card, and a signal transmission cable a is connected between the output port of the digital mobile communication comprehensive tester and the input port of the spectrum analyzer;
step B2, crystal oscillator synchronization is carried out between the spectrum analyzer and the digital mobile communication comprehensive tester, the crystal oscillator output port of the spectrum analyzer is connected to the crystal oscillator input port of the digital mobile communication comprehensive tester through a BNC connecting line, and the digital mobile communication comprehensive tester is controlled by the master control computer to open the external crystal oscillator synchronization function;
step B3, the main control computer controls the digital mobile communication comprehensive tester to fix the orderly output power to AsAnd the frequency is f (where f means f)1，f2…fnEtc. at a plurality of different frequencies), such as a sinusoidal signal having a signal power of 0dBm and frequencies of 1GHz, 2GHz, 3GHz, 4GHz, 5GHz, and 6GHz, respectively, where the power and frequency selected should remain the same as those selected in a 2. The spectrum analyzer tests under the corresponding frequency set value to obtain the actual value of the input power and then returns to the main control computer, and the main control computer records and stores the frequency set value and the output power set value A of the digital mobile communication comprehensive testersAnd the actual power value A measured by the spectrum analyzerra。
In the method for correcting the power level of the integrated digital mobile communication tester in this embodiment 1, the step C of testing the level measurement indication error of the integrated digital mobile communication tester by using the high-frequency signal generator further includes the following steps:
step C1, the main control computer is respectively connected with the high-frequency signal generator and the digital mobile communication integrated tester in a communication way through a USB communication cable or a GPIB interface card, and a signal transmission cable a is connected between the output port of the high-frequency signal generator and the output port of the digital mobile communication integrated tester;
step C2, carrying out crystal oscillator synchronization between the high-frequency signal generator and the digital mobile communication comprehensive tester, connecting the crystal oscillator output port of the high-frequency signal generator to the crystal oscillator input port of the digital mobile communication comprehensive tester through a BNC connecting line, and controlling the digital mobile communication comprehensive tester to open the external crystal oscillator synchronization function by the master control computer;
step C3, the main control computer controls the orderly output power of the high-frequency signal generator to be fixed at AsAnd the frequency is f (where f means f)1，f2…fnEtc. at a plurality of different frequencies), such as a sinusoidal signal having a signal power of 0dBm and frequencies of 1GHz, 2GHz, 3GHz, 4GHz, 5GHz, and 6GHz, respectively, where the power and frequency selected should remain the same as those selected in a 2. The digital mobile communication comprehensive tester tests under the corresponding frequency set value to obtain the actual value of the input power and returns to the main control computer, and the main control computer records and stores the frequency set value f and the output power set value A of the high-frequency signal generatorsAnd the actual power value A measured by the digital mobile communication comprehensive testerrm。
In the method for correcting the power level of the integrated digital mobile communication tester in this embodiment 1, the specific method for writing the power output error correction value and the level measurement indication error correction value into the integrated digital mobile communication tester in step E includes: the main control computer is in communication connection with the digital mobile communication comprehensive tester through a USB communication cable or a GPIB interface card, and writes a power output error correction value and a level measurement indication error correction value of an additional or non-additional line loss value and corresponding frequency into a line loss correction setting frame of the digital mobile communication comprehensive tester according to the selection of a user, so that the power output and the level measurement indication value of the digital mobile communication comprehensive tester are corrected.
In the method for correcting the power level of the digital mobile communication integrated tester described in this embodiment 1, in the step a2, a result obtained by subtracting a power set value of the high-frequency signal generator from an actual power value measured by the power meter at different frequencies is a line loss value of the signal transmission cable a at a frequency corresponding to the electrical signal.
In the method for correcting power level of the integrated digital mobile communications tester described in this embodiment 1, in step B3, the actual power value a measured by the spectrum analyzerraSubtracting the set value A of the output power of the digital mobile communication synthesizersThe difference value of (a) is the superposition of the output power error value of the digital mobile communication comprehensive tester and the line loss value of the signal transmission cable a.
In the method for correcting power level of the integrated digital mobile communications tester described in this embodiment 1, in the step C3, the integrated digital mobile communications tester measures the power indication value armSubtracting the set value A of the output power of the high-frequency signal generatorsThe difference value of (a) is the superposition of the level measurement indicating value error of the digital mobile communication comprehensive tester and the line loss value of the signal transmission cable a.
Specifically, the frequency setting and the power setting in step a2, step B3, and step C3 should be respectively identical; in step 2, step 5 and step 8, the ordered output power is fixed as AsAnd the frequency is f (where f means f)1，f2…fnEtc. of a plurality of different frequencies) means that a certain power, such as 0dBm, is output and the output frequency is orderly set to different frequencies, such as 1GHz, 2GHz, etc., while being maintained.
Example 2
The embodiment 2 of the invention also provides a power level correction system of the digital mobile communication comprehensive tester, which comprises a main control computer, and the digital mobile communication comprehensive tester, a high-frequency signal generator, a power meter and a spectrum analyzer which are all in signal connection with the main control computer;
the high-frequency signal generator and the power meter are used for testing the line loss of the signal transmission cable;
the spectrum analyzer is used for testing the power output error of the digital mobile communication comprehensive tester;
the high-frequency signal generator is used for testing the level measurement indicating value error of the digital mobile communication comprehensive tester;
and the main control computer calculates the corrected value of the power output error and the level measurement indicating value error of the digital mobile communication comprehensive tester, and writes the power output error corrected value and the level measurement indicating value error corrected value with or without line loss value into the digital mobile communication comprehensive tester according to the selection of a user to correct the power output and the level measurement indicating value of the digital mobile communication comprehensive tester.
Specifically, the power level correction system of the digital mobile communication comprehensive tester automatically realizes the functions of signal emission, power reading, data storage and the like of each instrument, facilitates automatic production operation and effectively improves the working efficiency.
The power level correction system of the digital mobile communication comprehensive tester further comprises a signal transmission cable a, a USB communication cable, a GPIB interface card and a BNC connecting wire.
When the high-frequency signal generator and the power meter test the line loss of the signal transmission cable, the main control computer is respectively in communication connection with the high-frequency signal generator and the power meter through a USB communication cable or a GPIB interface card, and the signal transmission cable a is connected between the output port of the high-frequency signal generator and the input port of the power meter;
when the spectrum analyzer tests the power output error of the digital mobile communication comprehensive tester, the main control computer is respectively in communication connection with the spectrum analyzer and the digital mobile communication comprehensive tester through a USB communication cable or a GPIB interface card, and a signal transmission cable a is connected between the output port of the digital mobile communication comprehensive tester and the input port of the spectrum analyzer; performing crystal oscillator synchronization between the spectrum analyzer and the digital mobile communication comprehensive tester, connecting a crystal oscillator output port of the spectrum analyzer to a crystal oscillator input port of the digital mobile communication comprehensive tester through a BNC (bayonet nut connector) connecting line, and controlling the digital mobile communication comprehensive tester to open an external crystal oscillator synchronization function by the master control computer;
when the high-frequency signal generator tests the level measurement indication error of the digital mobile communication comprehensive tester, the main control computer is respectively in communication connection with the high-frequency signal generator and the digital mobile communication comprehensive tester through a USB communication cable or a GPIB interface card, and a signal transmission cable a is connected between the output port of the high-frequency signal generator and the output port of the digital mobile communication comprehensive tester; the high-frequency signal generator and the digital mobile communication comprehensive tester are in crystal oscillator synchronization, the output port of the crystal oscillator of the high-frequency signal generator is connected to the input port of the crystal oscillator of the digital mobile communication comprehensive tester through a BNC connecting wire, and the master control computer controls the digital mobile communication comprehensive tester to open the external crystal oscillator synchronization function.
Although the present invention has been described with reference to the above preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A method for correcting power level of a digital mobile communication comprehensive tester is characterized by comprising the following steps:
step A, testing the line loss of a signal transmission cable by using a high-frequency signal generator and a power meter;
step B, testing the power output error of the digital mobile communication comprehensive tester by using a spectrum analyzer;
step C, testing the level measurement indicating value error of the digital mobile communication comprehensive tester by using a high-frequency signal generator;
d, calculating a corrected value of the power output error and the level measurement indicating value error of the digital mobile communication comprehensive tester;
and E, writing the power output error correction value and the level measurement indication error correction value into the digital mobile communication comprehensive tester.
2. The method of claim 1, wherein the step a of testing the line loss of the signal transmission cable by using the high frequency signal generator and the power meter further comprises the steps of:
step A1, the main control computer is respectively connected with the high-frequency signal generator and the power meter through a USB communication cable or a GPIB interface card, and a signal transmission cable a is connected between the output port of the high-frequency signal generator and the input port of the power meter;
step A2, the main control computer controls the orderly output power of the high-frequency signal generator to be fixed at AsAnd the frequency is f (where f means f)1，f2…fnEqual multiple different frequencies), the power meter tests and obtains the actual value A of the input power under the corresponding frequency set value frpAnd returning to the main control computer, wherein the main control computer records and stores the frequency set value f and the power set value A of the high-frequency signal generatorsAnd the actual value A of the power measured by the power meterrp。
3. The method of claim 1, wherein the step B of testing the power output error of the integrated digital mobile communication tester by using the spectrum analyzer further comprises the steps of:
step B1, the main control computer is respectively connected with the spectrum analyzer and the digital mobile communication comprehensive tester in a communication way through a USB communication cable or a GPIB interface card, and a signal transmission cable a is connected between the output port of the digital mobile communication comprehensive tester and the input port of the spectrum analyzer;
step B2, crystal oscillator synchronization is carried out between the spectrum analyzer and the digital mobile communication comprehensive tester, the crystal oscillator output port of the spectrum analyzer is connected to the crystal oscillator input port of the digital mobile communication comprehensive tester through a BNC connecting line, and the digital mobile communication comprehensive tester is controlled by the master control computer to open the external crystal oscillator synchronization function;
step B3, the main control computer controls the digital mobile communication comprehensive tester to fix the orderly output power to AsAnd the frequency is f (where f means f)1，f2…fnEqual multiple different frequencies), and the spectrum analyzer tests and obtains the actual value A of the input power under the corresponding frequency set value fraAnd returning to the main control computer, wherein the main control computer records and stores the frequency set value f and the output power set value A of the digital mobile communication comprehensive testersAnd the actual power value A measured by the spectrum analyzerra。
4. The method of claim 1, wherein the step C of testing the level measurement indication error of the digital mobile communication integrated tester by using the high frequency signal generator further comprises the steps of:
step C1, the main control computer is respectively connected with the high-frequency signal generator and the digital mobile communication integrated tester in a communication way through a USB communication cable or a GPIB interface card, and a signal transmission cable a is connected between the output port of the high-frequency signal generator and the input port of the digital mobile communication integrated tester;
step C2, carrying out crystal oscillator synchronization between the high-frequency signal generator and the digital mobile communication comprehensive tester, connecting the crystal oscillator output port of the high-frequency signal generator to the crystal oscillator input port of the digital mobile communication comprehensive tester through a BNC connecting line, and controlling the digital mobile communication comprehensive tester to open the external crystal oscillator synchronization function by the master control computer;
step C3, the main control computer controls the orderly output power of the high-frequency signal generator to be fixed at AsAnd the frequency is f (where f means f)1，f2…fnEqual multiple different frequencies), the digital mobile communication comprehensive tester tests and obtains the actual value A of the input power under the corresponding frequency set value frmAnd returning to the main control computer, wherein the main control computer records and stores the frequency set value f and the output power set value A of the high-frequency signal generatorsAnd power indicated value A measured by digital mobile communication comprehensive testerrm。
5. The method for correcting the power level of the integrated digital mobile communication tester as claimed in claim 1, wherein the step E of writing the power output error correction value and the level measurement indication error correction value into the integrated digital mobile communication tester comprises the following specific steps: the main control computer is in communication connection with the digital mobile communication comprehensive tester through a USB communication cable or a GPIB interface card, and writes a power output error correction value and a level measurement indication error correction value of an additional or non-additional line loss value and corresponding frequency into a line loss correction setting frame of the digital mobile communication comprehensive tester according to the selection of a user, so that the power output and the level measurement indication value of the digital mobile communication comprehensive tester are corrected.
6. The method of claim 2, wherein the power level calibration of the integrated digital mobile communication tester comprises: in the step a2, the result of subtracting the power set value of the high-frequency signal generator from the actual power value measured by the power meter at different frequencies is the line loss value of the signal transmission cable a at the corresponding electrical signal frequency.
7. The method of claim 3, wherein the power level calibration of the integrated digital mobile communication tester comprises: in said step B3, the actual power value A measured by the spectrum analyzerraSubtractive digital mobile communication synthesisSet value A of instrument output powersThe difference value of (a) is the superposition of the output power error value of the digital mobile communication comprehensive tester and the line loss value of the signal transmission cable a.
8. The method of claim 4, wherein the power level calibration of the integrated digital mobile communication tester comprises: in the step C3, the digital mobile communication integrated tester measures the power indication value armSubtracting the set value A of the output power of the high-frequency signal generatorsThe difference value of (a) is the superposition of the level measurement indicating value error of the digital mobile communication comprehensive tester and the line loss value of the signal transmission cable a.
9. A power level correction system of a digital mobile communication comprehensive tester is characterized in that: the system comprises a main control computer, a digital mobile communication comprehensive tester, a high-frequency signal generator, a power meter and a spectrum analyzer, wherein the digital mobile communication comprehensive tester is in signal connection with the main control computer;
the high-frequency signal generator and the power meter are used for testing the line loss of the signal transmission cable;
the spectrum analyzer is used for testing the power output error of the digital mobile communication comprehensive tester;
the high-frequency signal generator is used for testing the level measurement indicating value error of the digital mobile communication comprehensive tester;
and the main control computer calculates the corrected value of the power output error and the level measurement indicating value error of the digital mobile communication comprehensive tester, and writes the power output error corrected value and the level measurement indicating value error corrected value with or without line loss value into the digital mobile communication comprehensive tester according to the selection of a user to correct the power output and the level measurement indicating value of the digital mobile communication comprehensive tester.
10. The power level calibration system of a digital mobile communication integrated tester as claimed in claim 8, wherein: the power level correction system of the digital mobile communication comprehensive tester also comprises a signal transmission cable a, a USB communication cable, a GPIB interface card and a BNC connecting wire;
when the line loss of the signal transmission cable is tested by the high-frequency signal generator and the power meter, the main control computer is respectively in communication connection with the high-frequency signal generator and the power meter through a USB communication cable or a GPIB interface card, and the signal transmission cable a is connected between the output port of the high-frequency signal generator and the input port of the power meter;
when the spectrum analyzer tests the power output error of the digital mobile communication comprehensive tester, the main control computer is respectively in communication connection with the spectrum analyzer and the digital mobile communication comprehensive tester through a USB communication cable or a GPIB interface card, and a signal transmission cable a is connected between the output port of the digital mobile communication comprehensive tester and the input port of the spectrum analyzer; performing crystal oscillator synchronization between the spectrum analyzer and the digital mobile communication comprehensive tester, connecting a crystal oscillator output port of the spectrum analyzer to a crystal oscillator input port of the digital mobile communication comprehensive tester through a BNC (bayonet nut connector) connecting line, and controlling the digital mobile communication comprehensive tester to open an external crystal oscillator synchronization function by the master control computer;
when the high-frequency signal generator tests the level measurement indication error of the digital mobile communication comprehensive tester, the main control computer is respectively in communication connection with the high-frequency signal generator and the digital mobile communication comprehensive tester through a USB communication cable or a GPIB interface card, and a signal transmission cable a is connected between the output port of the high-frequency signal generator and the input port of the digital mobile communication comprehensive tester; the high-frequency signal generator and the digital mobile communication comprehensive tester are in crystal oscillator synchronization, the output port of the crystal oscillator of the high-frequency signal generator is connected to the input port of the crystal oscillator of the digital mobile communication comprehensive tester through a BNC connecting wire, and the master control computer controls the digital mobile communication comprehensive tester to open the external crystal oscillator synchronization function.
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