CN107994962B - Test terminal, radio frequency test method thereof and device with storage function - Google Patents
Test terminal, radio frequency test method thereof and device with storage function Download PDFInfo
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- CN107994962B CN107994962B CN201710932003.2A CN201710932003A CN107994962B CN 107994962 B CN107994962 B CN 107994962B CN 201710932003 A CN201710932003 A CN 201710932003A CN 107994962 B CN107994962 B CN 107994962B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
- H04B17/327—Received signal code power [RSCP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/345—Interference values
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
Abstract
The invention discloses a test terminal, a radio frequency test method thereof and a device with a storage function, wherein the radio frequency test method is used for the radio frequency test of an intelligent terminal, and comprises the following steps: the method comprises the steps that a test terminal obtains a frequency band and a bandwidth supported by an intelligent terminal; determining a plurality of test frequency points of the intelligent terminal according to the frequency band and the bandwidth; acquiring actual power of the intelligent terminal when the intelligent terminal transmits data at a plurality of test frequency points according to the set maximum power in sequence; and judging whether the actual power exceeds the preset power or not, and generating a test report according to the judgment result. By the radio frequency test method, the test can be performed in the emission mode of the intelligent terminal, and the test speed is improved.
Description
Technical Field
The invention relates to the field of radio frequency testing, in particular to a testing terminal, a radio frequency testing method thereof and a device with a storage function.
Background
Before a certain function is realized, the intelligent terminal generally needs to be tested for many times so as to determine the effectiveness of the corresponding function.
Taking the intelligent radio frequency test as an example, in the initial stage of the radio frequency test and authentication of the intelligent terminal, the LTE frequency band spurious condition of the intelligent terminal needs to be tested.
At present, the LTE frequency band straggling of the intelligent terminal is completed in the signaling mode of the intelligent terminal, and if the LTE frequency band of the intelligent terminal is authenticated by an authentication agency, the LTE frequency band straggling is tested in the signaling mode of the intelligent terminal.
However, in the research and development stage of the intelligent terminal, the function of the intelligent terminal is not perfect, the situation that the intelligent terminal cannot enter the signaling mode often occurs, the stray situation of the LTE frequency band of the intelligent terminal cannot be tested at the moment, the testing efficiency is not high, and the testing speed of a product is influenced.
Disclosure of Invention
The invention mainly solves the technical problem of providing a test terminal, a radio frequency test method thereof and a device with a storage function, which can carry out test in a transmitting mode of an intelligent terminal and improve the speed of radio frequency test.
In order to solve the technical problems, the first technical scheme adopted by the invention is as follows: providing a radio frequency test method, wherein the radio frequency test method is used for radio frequency test of an intelligent terminal, and the radio frequency test method comprises the following steps: the test terminal acquires a frequency band and a bandwidth supported by the intelligent terminal; determining a plurality of test frequency points of the intelligent terminal according to the frequency band and the bandwidth; acquiring actual power of the intelligent terminal when the intelligent terminal transmits data at the plurality of test frequency points according to the set maximum power in sequence; and judging whether the actual power exceeds the preset power or not, and generating a test report according to a judgment result.
In order to solve the above technical problems, the second technical solution adopted by the present invention is: providing a test terminal, the test terminal comprising: the system comprises a processor and a man-machine circuit which are mutually coupled, wherein the processor is matched with the man-machine circuit to realize the steps in any radio frequency test method in the invention when working.
In order to solve the above technical problems, the third technical solution adopted by the present invention is: there is provided a device having a memory function, the device storing program data executable to implement the steps of the radio frequency test method of any one of the present invention.
The invention has the beneficial effects that: the radio frequency testing method tests the radio frequency of the intelligent terminal, determines a plurality of testing frequency points of the intelligent terminal according to the frequency band and the bandwidth supported by the intelligent terminal, obtains the actual power of the intelligent terminal when the data are transmitted at the plurality of testing frequency points in sequence according to the set maximum power, judges whether the actual power exceeds the preset power, generates a testing report according to the judgment result, and improves the testing speed.
Drawings
FIG. 1 is a schematic flow chart diagram illustrating an embodiment of a radio frequency testing method according to the present invention;
FIG. 2 is a schematic structural diagram of an embodiment of a test terminal according to the present invention;
FIG. 3 is a schematic structural diagram of an embodiment of an apparatus with a storage function according to the present invention.
Detailed Description
The present invention provides a test terminal, a radio frequency test method thereof, and a device with a storage function, so that the objects, technical solutions, and technical effects of the present invention are more clear and clear, and the present invention is further described in detail below.
Referring to fig. 1, fig. 1 is a schematic flow chart of an embodiment of a radio frequency testing method of the present invention. The radio frequency test method of the embodiment is used for testing the radio frequency index of the intelligent terminal, and comprises the following steps:
101: and the test terminal acquires the frequency band and the bandwidth supported by the intelligent terminal.
In this embodiment, the test terminal includes an upper computer and a spectrum analyzer, wherein the upper computer includes a computer.
The intelligent terminal comprises intelligent equipment such as a smart phone and a tablet personal computer. In a specific test scenario, the upper computer is connected with the spectrum analyzer through a universal interface bus so that data can be transmitted between the upper computer and the spectrum analyzer. Meanwhile, the intelligent terminal is respectively connected with the upper computer and the spectrum analyzer to transmit data.
In one embodiment, the host computer and the spectrum analyzer are connected through a General-Purpose Interface Bus (GPIB) Interface line. Meanwhile, the intelligent terminal is connected with an upper computer in the test terminal through a USB line, and the intelligent terminal is connected with a spectrum analyzer in the test terminal through an RF Cable line. In this embodiment, the power supply types of the intelligent terminal are various, for example, the power supply can be performed by a built-in battery of the intelligent terminal, such as a lithium battery; power may also be supplied by an external power source, such as a digital power source. In a specific embodiment, when the intelligent terminal is powered by a digital power supply, the test terminal further comprises the digital power supply, and the digital power supply is connected with the upper computer through a GPIB interface line to transmit data; and the test terminal controls the digital power supply to be turned on or off according to the actual test condition so as to control the on-off of the intelligent terminal power supply. In addition, the voltage output by the digital power supply is optional and depends on the power supply voltage required by the intelligent terminal, for example, the voltage output by the digital power supply can be set to be 3.8V to supply power to the intelligent terminal.
Generally, in a development stage, a frequency band spurious response of an intelligent terminal needs to be tested and subjected to related authentication, and at present, the testing and the related authentication are performed in a signaling mode of the intelligent terminal, wherein the signaling mode is used for simulating normal operation of the intelligent terminal and comprises a transmitting mode and a receiving mode. However, the performance of the product in the research and development stage is not perfect, the situation that the signal mode cannot be entered often occurs, the stray situation of the LTE frequency band of the intelligent terminal cannot be tested at the moment, the testing efficiency is not high, and the testing speed of the product is influenced.
In order to improve the testing speed, in this embodiment, after the intelligent terminal is powered on, the testing terminal starts a testing mode matched with the power supply type according to the power supply type of the intelligent terminal, and controls the intelligent terminal to enter a non-signaling mode through the USB interface line, where the non-signaling mode refers to that the intelligent terminal is only in one of a receiving mode or a transmitting mode.
The frequency band spurious problem usually occurs when in the transmit mode, which is explained here with the smart terminal in the transmit mode. When the intelligent terminal is in a transmitting mode, the testing terminal acquires a frequency band and a bandwidth supported by the intelligent terminal. The frequency range of the band in the present embodiment is determined according to the LTE band specified in the 3GPP TS 36.521-1V14.1.0(2016-12) protocol. Specifically, the bandwidths corresponding to different frequency bands are different, and the same frequency band also corresponds to different bandwidths, and is related to the product specification or product trend of the intelligent terminal.
In this embodiment, the test terminal obtains a frequency band supported by the intelligent terminal, and determines a bandwidth corresponding to the intelligent terminal according to the frequency band. The bandwidth of the present embodiment is determined according to a specific bandwidth corresponding to the LTE band specified in the 3GPP TS 36.521-1V14.1.0(2016-12) protocol. For example, when the frequency band supported by the smart terminal is 1920MHz to 1980MHz, the frequency bandwidths of the bandwidths corresponding to the frequency band include 5MHz, 10MHz, 15MHz, and 20 MHz. The corresponding bandwidth can be selected according to the actual situation under the frequency band.
In the actual test process, the line loss of the RF Cable line exists, and the line loss of the RF Cable line in the test environment is different in different frequency ranges, so that in order to acquire more accurate test data, after the frequency band and the bandwidth supported by the intelligent terminal are acquired, line loss compensation is performed according to the frequency band and the bandwidth.
Specifically, the line loss compensation value may be determined according to a preset line loss compensation table, for example, when the frequency range is 1GHz to 2GHz, the line loss compensation value is 1dB, when the frequency range is 9GHz to 10GHz, the line loss compensation value is 9dB, and when the frequency range is 15GHz to 16GHz, the line loss compensation value is 15dB, which is not listed here; line compensation can also be performed according to the actual RF Cable line test condition.
102: and determining a plurality of test frequency points of the intelligent terminal according to the frequency band and the bandwidth. In this embodiment, the test terminal determines a plurality of test frequency points of the intelligent terminal according to the frequency band and the bandwidth.
The number of the test frequency points may be 2 or 3 or other values, such as 5, and may be determined according to an actual test situation.
Specifically, the number of test frequency points is 3. The test frequency points are respectively a middle test frequency point, a low-frequency test frequency point and a high-frequency test frequency point. In addition, the corresponding frequency of the test frequency point can be determined by the frequency band and the bandwidth. Specifically, the frequency band of the intelligent terminal includes an initial frequency point and a termination frequency point, and the frequency f of the intermediate test frequency point can be determined according to the formula (1)2，
f2＝f0+(f1-f0)/2 (1)
Wherein f is0Frequency of the starting frequency point, f1Is the frequency of the termination bin.
Further, according to the initial frequency point and the bandwidth, determining the frequency f of the low-frequency test frequency point according to the formula (2)3，
f3＝f0+W/2 (2)
Wherein f is0Is the frequency of the initial frequency point, and W is the frequency bandwidth of the bandwidth.
And finally, determining the frequency f of the high-frequency test frequency point according to the formula (3) according to the termination frequency point and the bandwidth4，
f4＝f1-W/2 (3)
Wherein f is1For terminating the frequency of the frequency point, W is the bandwidth of the bandwidth。
Here, in order to describe the method for determining the frequencies corresponding to the intermediate test frequency point, the low frequency test frequency point, and the high frequency test frequency point more intuitively. The frequency band is 1920 MHz-1980 MHz, and the bandwidth of the bandwidth is 5MHz, i.e., f0＝1920MHz，f1＝1980MHz，W＝5MHz。
According to the formula (1), the frequency of the intermediate test frequency point is f21950 MHz; frequency f of low-frequency test frequency point31922.5 MHz; frequency f of high-frequency test frequency point4＝1977.5MHz。
103: and acquiring the actual power of the intelligent terminal when the intelligent terminal transmits data at a plurality of test frequency points according to the set maximum power in sequence.
In this embodiment, after determining the test frequency point of the intelligent terminal, the test terminal sends a control instruction, so that the intelligent terminal sequentially transmits data at the test frequency point according to the set maximum power in a non-signaling mode. The maximum power setting can be determined by the maximum transmitting power of the intelligent terminal and can also be determined according to the actual test condition.
In one embodiment, the test terminal controls the spectrum analyzer through a GPIB interface line, so that the spectrum analyzer obtains the actual power of the intelligent terminal when transmitting data at a plurality of test frequency points in sequence according to the set maximum power.
In another embodiment, the test terminal scans the intelligent terminal at a plurality of test frequency points in sequence according to the set maximum power emission data through a preset scanning frequency so as to obtain the actual power corresponding to the scanning frequency. The preset scanning frequency comprises a preset starting scanning frequency and a preset cut-off scanning frequency.
Specifically, the preset initial scanning frequency is the frequency corresponding to the test frequency point of the intelligent terminal plus three times of the bandwidth, and can be determined according to the following formula (4):
F0＝F+B*3 (4)
wherein, B is the actual bandwidth of the current test frequency band, and F is the frequency of the test frequency point.
For example, when the intelligent terminalThe frequency of the test frequency point of the terminal in the non-signaling mode is f31922.5MHz, 5MHz as the actual bandwidth B of the current testing frequency band, when the frequency point is transmitted with maximum power, the scanning frequency F is started01937.5 MHz. In addition, in order to make the scanning range larger, the frequency range of the second harmonic and the third harmonic of the test frequency point can be covered, and the preset cut-off scanning frequency is 18 GHz.
After the initial scanning frequency and the termination scanning frequency are determined, the test terminal scans data transmitted by the intelligent terminal according to the initial scanning frequency and the termination scanning frequency and obtains power corresponding to the current scanning frequency.
104: and judging whether the actual power exceeds the preset power or not, and generating a test report according to a judgment result.
In this embodiment, the test terminal generates a spectrogram with the scanning frequency as the abscissa and the actual power as the ordinate according to the acquired actual power. Meanwhile, whether the actual power exceeds the preset power is judged and determined, and a test report is generated according to the test result. The test report visually displays the actual power of the data which is correspondingly transmitted by the test frequency point of the intelligent terminal under the scanning frequency.
Here, it should be noted that the preset power is a power limit value, and is used as a reference for measuring whether the transmission power corresponding to the frequency point exceeds the power limit value, and when the actual power corresponding to any test frequency point exceeds the preset power, the condition that frequency band strays exist in the frequency band is represented.
Different from the prior art, the radio frequency testing method of the embodiment tests the radio frequency of the intelligent terminal, determines a plurality of testing frequency points of the intelligent terminal according to the frequency band and the bandwidth supported by the intelligent terminal, obtains the actual power of the intelligent terminal when the data is transmitted at the plurality of testing frequency points according to the set maximum power in sequence, judges whether the actual power exceeds the preset power, generates a testing report according to the judgment result, and improves the testing speed.
Referring to fig. 2, fig. 2 is a schematic structural diagram of an embodiment of a test terminal according to the present invention. The test terminal 20 of the present embodiment includes a man-machine circuit 21 and a processor 22 coupled to each other, wherein the processor 22 can implement the radio frequency test method of any one of the above embodiments.
In this embodiment, the test terminal 20 includes an upper computer and a spectrum analyzer, wherein the upper computer includes a computer.
The intelligent terminal comprises intelligent equipment such as a smart phone and a tablet personal computer. In a specific test scenario, the upper computer is connected with the spectrum analyzer through a universal interface bus so that data can be transmitted between the upper computer and the spectrum analyzer. Meanwhile, the intelligent terminal is respectively connected with the upper computer and the spectrum analyzer to transmit data.
In one embodiment, the host computer and the spectrum analyzer are connected through a General-Purpose Interface Bus (GPIB) Interface line. Meanwhile, the intelligent terminal is connected with the upper computer through a USB line, and the intelligent terminal is connected with the spectrum analyzer through an RFCable line. In this embodiment, the power supply types of the intelligent terminal are various, for example, the power supply can be performed by a built-in battery of the intelligent terminal, such as a lithium battery; power may also be supplied by an external power source, such as a digital power source.
In a specific embodiment, when the intelligent terminal is powered by a digital power supply, the test terminal 20 further includes a digital power supply, and the digital power supply is connected to the upper computer through a GPIB interface line to transmit data; the processor 22 controls the digital power supply to be turned on or off according to the actual test condition so as to control the on-off of the intelligent terminal power supply. In addition, the voltage output by the digital power supply is optional and depends on the power supply voltage required by the intelligent terminal, for example, the voltage output by the digital power supply can be set to be 3.8V to supply power to the intelligent terminal.
Generally, in a development stage, a frequency band spurious response of an intelligent terminal needs to be tested and subjected to related authentication, and at present, the testing and the related authentication are performed in a signaling mode of the intelligent terminal, wherein the signaling mode is used for simulating normal operation of the intelligent terminal and comprises a transmitting mode and a receiving mode. However, the performance of the product in the research and development stage is not perfect, the situation that the signal mode cannot be entered often occurs, the stray situation of the LTE frequency band of the intelligent terminal cannot be tested at the moment, the testing efficiency is not high, and the testing speed of the product is influenced.
In order to increase the testing speed, in this embodiment, after the intelligent terminal is powered on, the processor 22 starts a testing mode matching the power supply type of the intelligent terminal according to the power supply type of the intelligent terminal, and controls the intelligent terminal to enter a non-signaling mode through the USB interface line, where the non-signaling mode refers to that the intelligent terminal is only in one of a receiving mode and a transmitting mode.
The frequency band spurious problem usually occurs when in the transmit mode, which is explained here with the smart terminal in the transmit mode. When the intelligent terminal is in a transmitting mode, the processor 22 obtains the frequency band and the bandwidth supported by the intelligent terminal. The frequency range of the intermediate frequency band in the present embodiment is determined according to the LTE frequency band defined in the 3gpp ts 36.521-1V14.1.0(2016-12) protocol. Specifically, the bandwidths corresponding to different frequency bands are different, and the same frequency band also corresponds to different bandwidths, and is related to the product specification or product trend of the intelligent terminal.
In this embodiment, the processor 22 obtains a frequency band supported by the intelligent terminal, and determines a bandwidth corresponding to the intelligent terminal according to the frequency band. The bandwidth of the present embodiment is determined according to a specific bandwidth corresponding to the LTE band specified in the 3GPP TS 36.521-1V14.1.0(2016-12) protocol. For example, when the frequency band supported by the smart terminal is 1920MHz to 1980MHz, the frequency bandwidths of the bandwidths corresponding to the frequency band include 5MHz, 10MHz, 15MHz, and 20 MHz. The corresponding bandwidth can be selected according to the actual situation under the frequency band.
In the actual test process, the line loss of the RF Cable line exists, and the line loss of the RF Cable line in the test environment is different in different frequency ranges, so that in order to acquire more accurate test data, after the frequency band and the bandwidth supported by the intelligent terminal are acquired, line loss compensation is performed according to the frequency band and the bandwidth.
Specifically, the line loss compensation value may be determined according to a preset line loss compensation table, for example, when the frequency range is 1GHz to 2GHz, the line loss compensation value is 1dB, when the frequency range is 9GHz to 10GHz, the line loss compensation value is 9dB, and when the frequency range is 15GHz to 16GHz, the line loss compensation value is 15dB, which is not listed here; line compensation can also be performed according to the actual RF Cable line test condition.
The processor 22 determines a plurality of test frequency points of the intelligent terminal according to the frequency band and the bandwidth. In this embodiment, the processor 22 determines a plurality of test frequency points of the intelligent terminal according to the frequency band and the bandwidth.
The number of the test frequency points may be 2 or 3 or other values, such as 5, and may be determined according to an actual test situation.
Specifically, the number of test frequency points is 3. The test frequency points are respectively a middle test frequency point, a low-frequency test frequency point and a high-frequency test frequency point. In addition, the corresponding frequency of the test frequency point can be determined by the frequency band and the bandwidth. Specifically, the frequency band of the intelligent terminal includes an initial frequency point and a termination frequency point, and the frequency f of the intermediate test frequency point can be determined according to the formula (1)2，
f2＝f0+(f1-f0)/2 (1)
Wherein f is0Frequency of the starting frequency point, f1Is the frequency of the termination bin.
Further, according to the initial frequency point and the bandwidth, determining the frequency f of the low-frequency test frequency point according to the formula (2)3，
f3＝f0+W/2 (2)
Wherein f is0Is the frequency of the initial frequency point, and W is the frequency bandwidth of the bandwidth.
And finally, determining the frequency f of the high-frequency test frequency point according to the formula (3) according to the termination frequency point and the bandwidth4，
f4＝f1-W/2 (3)
Wherein f is1W is the frequency bandwidth of the bandwidth for the stop bin.
Here, in order to describe the method for determining the frequencies corresponding to the intermediate test frequency point, the low frequency test frequency point, and the high frequency test frequency point more intuitively. The frequency band is 1920 MHz-1980 MHz, and the bandwidth of the bandwidth is 5MHz as an example for explanation, namely，f0＝1920MHz，f1＝1980MHz，W＝5MHz。
According to the formula (1), the frequency of the intermediate test frequency point is f21950 MHz; frequency f of low-frequency test frequency point31922.5 MHz; frequency f of high-frequency test frequency point4＝1977.5MHz。
In this embodiment, after determining the test frequency point of the intelligent terminal, the processor 22 sends a control instruction, so that the intelligent terminal sequentially transmits data at the test frequency point according to the set maximum power in the non-signaling mode. The maximum power setting can be determined by the maximum transmitting power of the intelligent terminal and can also be determined according to the actual test condition.
In one embodiment, the processor 22 controls the spectrum analyzer through the GPIB interface line, so that the spectrum analyzer obtains the actual power of the intelligent terminal when the intelligent terminal transmits data at a plurality of test frequency points in sequence according to the set maximum power.
In another embodiment, the processor 22 scans the intelligent terminal at a plurality of test frequency points sequentially according to the set maximum power emission data through a preset scanning frequency to obtain the actual power corresponding to the scanning frequency. The preset scanning frequency comprises a preset starting scanning frequency and a preset cut-off scanning frequency.
Specifically, the preset initial scanning frequency is the frequency corresponding to the test frequency point of the intelligent terminal plus three times of the bandwidth, and can be determined according to the following formula (4):
F0＝F+B*3 (4)
wherein, B is the actual bandwidth of the current test frequency band, and F is the frequency of the test frequency point.
For example, when the frequency of the test frequency point of the intelligent terminal in the non-signaling mode is f31922.5MHz, 5MHz as the actual bandwidth B of the current testing frequency band, when the frequency point is transmitted with maximum power, the scanning frequency F is started01937.5 MHz. In addition, in order to make the scanning range larger, the frequency range of the second harmonic and the third harmonic of the test frequency point can be covered, and the preset cut-off scanning frequency is 18 GHz.
After determining the start scanning frequency and the end scanning frequency, the processor 22 scans data transmitted by the intelligent terminal according to the start scanning frequency and the end scanning frequency, and obtains power corresponding to the current scanning frequency.
In the present embodiment, the processor 22 generates a spectrogram having the scanning frequency as the abscissa and the actual power as the ordinate, based on the acquired actual power. Meanwhile, whether the actual power exceeds the preset power is judged and determined, and a test report is generated according to the test result. The test report visually displays the actual power of the data which is correspondingly transmitted by the test frequency point of the intelligent terminal under the scanning frequency.
Here, it should be noted that the preset power is a power limit value, and is used as a reference for measuring whether the transmission power corresponding to the frequency point exceeds the power limit value, and when the actual power corresponding to any test frequency point exceeds the preset power, the condition that frequency band strays exist in the frequency band is represented.
Different from the prior art, the test terminal of the embodiment tests the radio frequency of the intelligent terminal, determines a plurality of test frequency points of the intelligent terminal according to the frequency band and the bandwidth supported by the intelligent terminal, obtains the actual power of the intelligent terminal when the data is transmitted at the plurality of test frequency points in sequence according to the set maximum power, judges whether the actual power exceeds the preset power, generates a test report according to the judgment result, and improves the test speed.
Referring to fig. 3, fig. 3 is a schematic structural diagram of an embodiment of the device with a storage function according to the present invention. The device 30 with a storage function stores at least one program 31, and the program 31 is used for implementing the radio frequency testing method according to any one of the above embodiments.
In one embodiment, the apparatus 30 with a storage function may be a storage chip in a terminal, a hard disk, or a removable hard disk, or a flash disk, an optical disk, or other readable and writable storage means, and may also be a server, or the like.
Here, a memory chip having a device with a memory function as a test terminal is explained as an example.
In this embodiment, the test terminal includes an upper computer and a spectrum analyzer, wherein the upper computer includes a computer.
The intelligent terminal comprises intelligent equipment such as a smart phone and a tablet personal computer. In a specific test scenario, the upper computer is connected with the spectrum analyzer through a universal interface bus so that data can be transmitted between the upper computer and the spectrum analyzer. Meanwhile, the intelligent terminal is respectively connected with the upper computer and the spectrum analyzer to transmit data.
In one embodiment, the host computer and the spectrum analyzer are connected through a General-Purpose Interface Bus (GPIB) Interface line. Meanwhile, the intelligent terminal is connected with the upper computer through a USB line, and the intelligent terminal is connected with the spectrum analyzer through an RFCable line. In this embodiment, the power supply types of the intelligent terminal are various, for example, the power supply can be performed by a built-in battery of the intelligent terminal, such as a lithium battery; power may also be supplied by an external power source, such as a digital power source.
In a specific embodiment, when the intelligent terminal is powered by a digital power supply, the test terminal further comprises the digital power supply, and the digital power supply is connected with the upper computer through a GPIB interface line to transmit data; and the program 31 controls the digital power supply to be turned on or off according to the actual test condition so as to control the on-off of the intelligent terminal power supply. In addition, the voltage output by the digital power supply is optional and depends on the power supply voltage required by the intelligent terminal, for example, the voltage output by the digital power supply can be set to be 3.8V to supply power to the intelligent terminal.
Generally, in a development stage, a frequency band spurious response of an intelligent terminal needs to be tested and subjected to related authentication, and at present, the testing and the related authentication are performed in a signaling mode of the intelligent terminal, wherein the signaling mode is used for simulating normal operation of the intelligent terminal and comprises a transmitting mode and a receiving mode. However, the performance of the product in the research and development stage is not perfect, the situation that the signal mode cannot be entered often occurs, the stray situation of the LTE frequency band of the intelligent terminal cannot be tested at the moment, the testing efficiency is not high, and the testing speed of the product is influenced.
In order to increase the testing speed, in this embodiment, after the intelligent terminal is powered on, the program 31 starts a testing mode matching the power supply type according to the power supply type of the intelligent terminal, and controls the intelligent terminal to enter a non-signaling mode through the USB interface line, where the non-signaling mode refers to that the intelligent terminal is only in one of a receiving mode and a transmitting mode.
The frequency band spurious problem usually occurs when in the transmit mode, which is explained here with the smart terminal in the transmit mode. When the intelligent terminal is in the transmission mode, the program 31 acquires the frequency band and the bandwidth supported by the intelligent terminal. The frequency range of the band in the present embodiment is determined according to the LTE band specified in the 3GPP TS 36.521-1V14.1.0(2016-12) protocol. Specifically, the bandwidths corresponding to different frequency bands are different, and the same frequency band also corresponds to different bandwidths, and is related to the product specification or product trend of the intelligent terminal.
In this embodiment, the program 31 acquires a frequency band supported by the intelligent terminal, and determines a bandwidth corresponding to the intelligent terminal according to the frequency band. The bandwidth of the present embodiment is determined according to a specific bandwidth corresponding to the LTE band specified in the 3GPP TS 36.521-1V14.1.0(2016-12) protocol. For example, when the frequency band supported by the smart terminal is 1920MHz to 1980MHz, the frequency bandwidths of the bandwidths corresponding to the frequency band include 5MHz, 10MHz, 15MHz, and 20 MHz. The corresponding bandwidth can be selected according to the actual situation under the frequency band.
In the actual test process, the line loss of the RF Cable line exists, and the line loss of the RF Cable line in the test environment is different in different frequency ranges, so that in order to acquire more accurate test data, after the frequency band and the bandwidth supported by the intelligent terminal are acquired, line loss compensation is performed according to the frequency band and the bandwidth.
Specifically, the line loss compensation value may be determined according to a preset line loss compensation table, for example, when the frequency range is 1GHz to 2GHz, the line loss compensation value is 1dB, when the frequency range is 9GHz to 10GHz, the line loss compensation value is 9dB, and when the frequency range is 15GHz to 16GHz, the line loss compensation value is 15dB, which is not listed here; line compensation can also be performed according to the actual RF Cable line test condition.
The program 31 determines a plurality of test frequency points of the intelligent terminal according to the frequency band and the bandwidth. In this embodiment, the program 31 determines a plurality of test frequency points of the intelligent terminal according to the frequency band and the bandwidth.
The number of the test frequency points may be 2 or 3 or other values, such as 5, and may be determined according to an actual test situation.
Specifically, the number of test frequency points is 3. The test frequency points are respectively a middle test frequency point, a low-frequency test frequency point and a high-frequency test frequency point. In addition, the corresponding frequency of the test frequency point can be determined by the frequency band and the bandwidth. Specifically, the frequency band of the intelligent terminal includes an initial frequency point and a termination frequency point, and the frequency f of the intermediate test frequency point can be determined according to the formula (1)2，
f2＝f0+(f1-f0)/2 (1)
Wherein f is0Frequency of the starting frequency point, f1Is the frequency of the termination bin.
Further, according to the initial frequency point and the bandwidth, determining the frequency f of the low-frequency test frequency point according to the formula (2)3，
f3＝f0+W/2 (2)
Wherein f is0Is the frequency of the initial frequency point, and W is the frequency bandwidth of the bandwidth.
And finally, determining the frequency f of the high-frequency test frequency point according to the formula (3) according to the termination frequency point and the bandwidth4，
f4＝f1-W/2 (3)
Wherein f is1W is the frequency bandwidth of the bandwidth for the stop bin.
Here, in order to describe the method for determining the frequencies corresponding to the intermediate test frequency point, the low frequency test frequency point, and the high frequency test frequency point more intuitively. The frequency band is 1920 MHz-1980 MHz, and the bandwidth of the bandwidth is 5MHz, i.e., f0＝1920MHz，f1＝1980MHz，W＝5MHz。
According to the formula (1), the frequency of the intermediate test frequency point is f21950 MHz; of low-frequency test frequency pointsFrequency f31922.5 MHz; frequency f of high-frequency test frequency point4＝1977.5MHz。
In this embodiment, after determining the test frequency point of the intelligent terminal, the processor 22 sends a control instruction, so that the intelligent terminal sequentially transmits data at the test frequency point according to the set maximum power in the non-signaling mode. The maximum power setting can be determined by the maximum transmitting power of the intelligent terminal and can also be determined according to the actual test condition.
In one embodiment, the processor 22 controls the spectrum analyzer through the GPIB interface line, so that the spectrum analyzer obtains the actual power of the intelligent terminal when the intelligent terminal transmits data at a plurality of test frequency points in sequence according to the set maximum power.
In another embodiment, the processor 22 scans the intelligent terminal at a plurality of test frequency points sequentially according to the set maximum power emission data through a preset scanning frequency to obtain the actual power corresponding to the scanning frequency. The preset scanning frequency comprises a preset starting scanning frequency and a preset cut-off scanning frequency.
Specifically, the preset initial scanning frequency is the frequency corresponding to the test frequency point of the intelligent terminal plus three times of the bandwidth, and can be determined according to the following formula (4):
F0＝F+B*3 (4)
wherein, B is the actual bandwidth of the current test frequency band, and F is the frequency of the test frequency point.
For example, when the frequency of the test frequency point of the intelligent terminal in the non-signaling mode is f31922.5MHz, 5MHz as the actual bandwidth B of the current testing frequency band, when the frequency point is transmitted with maximum power, the scanning frequency F is started01937.5 MHz. In addition, in order to make the scanning range larger, the frequency range of the second harmonic and the third harmonic of the test frequency point can be covered, and the preset cut-off scanning frequency is 18 GHz.
After determining the start scanning frequency and the end scanning frequency, the processor 22 scans data transmitted by the intelligent terminal according to the start scanning frequency and the end scanning frequency, and obtains power corresponding to the current scanning frequency.
In the present embodiment, the processor 22 generates a spectrogram having the scanning frequency as the abscissa and the actual power as the ordinate, based on the acquired actual power. Meanwhile, whether the actual power exceeds the preset power is judged and determined, and a test report is generated according to the test result. The test report visually displays the actual power of the data which is correspondingly transmitted by the test frequency point of the intelligent terminal under the scanning frequency.
Here, it should be noted that the preset power is a power limit value, and is used as a reference for measuring whether the transmission power corresponding to the frequency point exceeds the power limit value, and when the actual power corresponding to any test frequency point exceeds the preset power, the condition that frequency band strays exist in the frequency band is represented.
Different from the prior art, the radio frequency testing method of the embodiment tests the radio frequency of the intelligent terminal, determines a plurality of testing frequency points of the intelligent terminal according to the frequency band and the bandwidth supported by the intelligent terminal, obtains the actual power of the intelligent terminal when the data is transmitted at the plurality of testing frequency points according to the set maximum power in sequence, judges whether the actual power exceeds the preset power, generates a testing report according to the judgment result, and improves the testing speed.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A radio frequency test method is used for radio frequency test of an intelligent terminal, and is characterized by comprising the following steps:
when the intelligent terminal is in a non-signaling mode, the test terminal acquires a frequency band and a bandwidth supported by the intelligent terminal;
determining 3 test frequency points of the intelligent terminal according to the frequency band and the bandwidth, wherein the 3 test frequency points are respectively a middle test frequency point and a low frequency test frequency pointAnd a high frequency test frequency point; acquiring a starting frequency point and a terminating frequency point of the frequency band, and determining the frequency f of the intermediate test frequency point according to a formula (1)2，
f2＝f0+(f1-f0)/2 (1)
Wherein f is0Is the frequency of the starting frequency point, f1The frequency of the termination frequency point is;
determining the frequency f of the low-frequency test frequency point according to the formula (2) according to the initial frequency point and the bandwidth3，
f3＝f0+W/2 (2)
Wherein f is0The frequency of the initial frequency point is W, and the bandwidth of the bandwidth is W;
determining the frequency f of the high-frequency test frequency point according to the formula (3) according to the termination frequency point and the bandwidth4，
f4＝f1-W/2 (3)
Wherein f is1The frequency of the termination frequency point is W, and the bandwidth of the bandwidth is W;
scanning the intelligent terminal at the 3 test frequency points in sequence according to the set maximum power emission data through a preset scanning frequency, and covering the frequency ranges of the second harmonic and the third harmonic of the test frequency points to obtain the actual power corresponding to the scanning frequency;
and judging whether the actual power exceeds a preset power, generating a test report according to a judgment result, and generating a spectrogram by taking the scanning frequency as an abscissa and the actual power as an ordinate.
2. The radio frequency test method according to claim 1, wherein the step of the test terminal acquiring the frequency band and the bandwidth supported by the intelligent terminal specifically comprises:
acquiring a frequency band supported by the intelligent terminal;
and determining the bandwidth corresponding to the intelligent terminal according to the frequency band.
3. The radio frequency test method according to claim 1, wherein the step of obtaining the actual power of the intelligent terminal when transmitting data at the 3 test frequency points in sequence according to the set maximum power specifically comprises:
and acquiring the actual power of the intelligent terminal when the data is transmitted at the 3 test frequency points in sequence according to the set maximum power through a spectrum analyzer.
4. The radio frequency test method according to claim 3, wherein the preset scan frequency comprises a preset start scan frequency and a preset cut-off scan frequency;
the preset starting scanning frequency is determined according to the following formula (4):
F0＝F+B*3 (4)
wherein, B is the actual bandwidth of the current test frequency band, and F is the frequency of the test frequency point.
5. The radio frequency test method according to claim 1, wherein the step of the test terminal acquiring the frequency band and the bandwidth supported by the intelligent terminal specifically comprises:
starting a test mode matched with the power supply type according to the power supply type of the intelligent terminal;
and acquiring the frequency band bandwidth supported by the intelligent terminal in the test mode.
6. The radio frequency test method of claim 5, wherein the power type comprises one of digital power supply power and battery power;
the step of starting the test mode matched with the power supply type according to the power supply type of the intelligent terminal specifically comprises the following steps:
when the intelligent terminal supplies power to the digital power supply, the test terminal outputs voltage so as to supply power to the intelligent terminal;
and starting a test mode matched with the power supply of the digital power supply.
7. A test terminal, characterized in that the test terminal comprises:
a processor and a human-machine circuit coupled to each other, the processor being operable to implement the steps in the radio frequency testing method of any one of claims 1 to 6 in cooperation with the human-machine circuit.
8. An apparatus having a memory function, wherein the apparatus stores program data executable to implement the steps in the radio frequency test method of any one of claims 1-6.
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| EP3806353B1 (en) * | 2019-10-09 | 2022-11-23 | Rohde & Schwarz GmbH & Co. KG | Method and test system for determining the device under test antenna frequency band relation |
| CN112995416B (en) * | 2019-12-18 | 2022-06-14 | 中国移动通信集团浙江有限公司 | Method and device for detecting frequency band of terminal |
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