Automatic testing method for medium and high frequency radio stations

Abstract

The present invention discloses an automatic test method for medium and high frequency radio stations, which replaces the manual test method, simplifies the test process, reduces the technical requirements for testers, and reduces the labor intensity of workers. When the line logic controller communicates with the radio station under test, an RS-422 serial communication interface is used, which has separate sending and receiving channels, so there is no need to control the data direction, and supports point-to-multipoint two-way communication. This automatic test method is provided with a self-diagnosis function, which automatically detects the status of the circuit and the communication line during the test process. When an abnormality occurs, the cause of the abnormality is analyzed, and the operator is prompted to handle it, thereby improving the operator's fault handling efficiency; and the setting of relevant parameters in the radio station power fine-tuning test can be completed automatically, avoiding errors caused by negligence of the operator, and improving the automation and intelligence of the test system.

Description

Technical Field

[0001] The invention belongs to the technical field of radio station testing, and in particular relates to an automatic testing method for medium and high frequency radio stations. Background Art

[0002] The medium and high frequency radio is the main body of the ground communication system, through which distress alarms, search and rescue coordination communications, on-site communications, etc. can be realized. At the same time, as an important equipment of GMDSS (Global Maritime Distress and Safety System), the medium and high frequency radio plays an important role in communication between ships and medium-distance navigation.

[0003] In order to ensure the safety of ship communications and navigation, each medium and high frequency radio must undergo a variety of performance tests before leaving the factory. At present, the testing of medium and high frequency radios is mainly done manually. Before the test, the tester needs to connect the test instrument to the radio under test through a cable, which increases the requirements for the tester; at the same time, the test results need to be recorded manually by the tester, which is prone to errors in the test results due to the negligence of the tester. Manual radio testing is cumbersome, which not only increases the labor intensity of the tester, but also reduces the test efficiency and the accuracy of the test results.

[0004] At present, the existing radio test system cannot solve the above problems well. For example, the ultra-short wave radio test system described in CN205212846U, although it has many advantages such as small size and fast response, cannot perform batch automatic testing on radio stations, and the test data cannot be saved; the ultra-short wave digital radio test system described in CN105656567A uses an automated digital test system to replace the traditional manual test method to improve the test efficiency, but it is only applicable to the test of ultra-short wave radio stations, and cannot perform batch testing on radio stations; the radio automatic test system described in CN202395782U, although it can perform batch automatic testing on radio stations to improve efficiency, does not provide a detailed test method for radio stations. Therefore, developing a test system that can perform batch and automatic testing on medium and high frequency radio stations, and the test data can be saved, is a problem to be solved by the current medium and high frequency radio test technology. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an automatic testing method for medium and high frequency radio stations.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a medium and high frequency radio automatic testing method, the automatic testing system adopted by the method includes a host system, a switch, an audio analyzer, a frequency meter, a spectrum analyzer, a junction box, a line logic controller, a display controller, and a test radio station placement rack;

[0007] The line logic controller includes a GPS RS-422 serial communication interface for communicating with the radio under test, a device under test power supply and power supply interface for powering the radio under test, a radio DSC interface for DSC power testing, and a radio SSB interface for SSB power testing;

[0008] The host system uses Ethernet to communicate with the audio analyzer, frequency meter, and spectrum analyzer through a switch to obtain the working status information of the audio analyzer, frequency meter, and spectrum analyzer as well as the test data of the radio station under test;

[0009] The line logic controller communicates with the radio station under test through the GPS RS-422 serial communication interface, sends control instructions to the radio station under test, and obtains the working status information and test data of the radio station under test; the host system uses Ethernet to communicate with the junction box, line logic controller, and display controller through the switch, and transmits the audio analyzer, frequency meter, spectrum analyzer, working status information of the radio station under test and the measurement data of the radio station under test obtained by the host system to the display controller; the line logic controller is equipped with an alarm;

[0010] The host system sends a radio test signal to the line logic controller via Ethernet. The line logic controller makes a signal judgment and controls the audio analyzer, frequency meter or spectrum analyzer to obtain the measured data from the radio station under test via the radio frequency line, and transmits the measured data to the host system via Ethernet. The host system transmits the test result to the display controller via Ethernet for display.

[0011] The specific process of the radio station test method of the automatic test system is as follows:

[0012] Step 1: Start the test system

[0013] 1.1. The operator places 8 radio stations under test on the radio station placement rack;

[0014] 1.2. The operator connects the power line, communication line, DSC test line and SSB test line of the radio station under test to the power interface, GPS RS-422 serial communication interface, radio station DSC interface and radio station SSB interface of the line logic controller respectively;

[0015] 1.3. The operator powers on the test system and opens the test software in the host system;

[0016] Step 2: Test mode selection

[0017] The operator selects the test mode of the radio station under test as the whole machine test or the power fine-tuning mode on the host system, generates the test mode data according to the table, and transmits them to the line logic controller and the display controller respectively; at the same time, the station number is added, and the transmission data is generated according to Table 1, and transmitted to the line logic controller;

[0018] Table 1 Data transmission format specification table

[0019]

[0020] The source address and destination address are defined as follows: the host system ID is 01; the line logic controller ID is 02; the display controller ID is 03;

[0021] Workstation number: 01~08 represents workstation 01 to workstation 08 respectively;

[0022] Test mode: 01 means whole machine test, 02 means power fine-tuning;

[0023] The specific contents of the instruction codes in Table 1 are shown in Table 2;

[0024] Table 2 Directive representative specification table

[0025] Code meaning Code meaning F0 Test mode settings 03 SSB power factor reading instruction F1 Stop the entire system test 04 DSC power factor reading instruction F2 Test station status 05 Radio mode settings F3 Stop the current station test 06 Radio TX frequency setting FC System working status: voltage, current 07 Radio station tuning status FD handshake communication 08 Open PTT FE Test instrument working status 09 Turn off PTT FF Error Type 0b Radio frequency setting 01 System Power On 0C Radio SSB power fine-tuning coefficient setting 02 Radio communication test 0D Radio DSC power fine-tuning coefficient setting 0E Radio power test setup complete

[0026] Step 3: Automatic test system self-diagnosis

[0027] 3.1. Handshake communication

[0028] The host system performs a handshake protocol with the line logic controller every 1 second. The specific process is as follows:

[0029] 3.1-1. The host system generates communication data according to Table 1, and performs handshake communication data transmission with the line logic controller and the radio under test through the PING IP command;

[0030] 3.1-2. The host system performs continuous status detection: If the continuous status detection is normal, go to step 3.2; if the continuous status detection is abnormal, perform step 3.1-3;

[0031] 3.1-3. The host system performs error information analysis: if the error information is an instrument connection error or a line logic controller connection error, the test is stopped; if the error information is a current station connection error, the test of the current station is stopped;

[0032] 3.1-4. The host system determines whether there is a waiting test station: if there is a waiting test station, go to step 2; if there is no waiting test station, the test ends;

[0033] 3.2. Real-time status monitoring of the test system

[0034] The host system reads the current and voltage of the power supply every 1 second, and the line logic controller detects the line working current and voltage every 1 second; the line logic controller generates current and voltage data according to Table 1 and transmits it to the host system;

[0035] 3.3、Test station status check

[0036] 3.3-1. The line logic controller performs a station status check to detect whether the number of the radio station under test can be read. If the radio station number is not detected, go to step 3.3-2. If the radio station number is detected, go to step 3.3-4.

[0037] 3.3-2. Display error information on the host system and prompt workers to troubleshoot the faults. Workers then perform troubleshooting.

[0038] 3.3-3, the line logic controller continues to check the station status. If the radio station number is not detected, go to step 3.3-2. If the radio station number is detected, go to step 3.3-4.

[0039] 3.3-4. The host system determines whether there is a station under test. If there is a station under test, it will be added to the waiting test queue; if there is no station under test, the radio will be tested as a whole or the radio power will be fine-tuned.

[0040] As a preferred solution, the whole machine test comprises the following steps:

[0041] Step 1: Communication test and power supply overvoltage test. The specific test process is as follows:

[0042] 1.1-1. Radio communication test, i.e. the test system and the tested radio send signals to each other. If either the tested radio or the test system fails to receive the signal, the communication fails and the alarm sends an alarm signal to prompt the tester to troubleshoot the problem.

[0043] 1.1-2. Power supply overvoltage test, that is, obtain the power supply voltage of the test system through the program-controlled power supply. If the voltage is within the allowable range, the test ends. If the voltage is not within the allowable range, the alarm sounds an alarm to prompt the tester to troubleshoot the problem;

[0044] 1.2. The test system performs a transmission frequency accuracy test on the radio station under test: the transmission frequency value of the radio station under test is changed through the attenuator; the frequency meter collects the a-frequency value transmitted by the radio station under test, in units of Hz, a≥5, and at the same time, the spectrum analyzer collects the power value corresponding to the frequency transmitted by the radio station under test. If the frequency difference between the two is within ±10Hz, the transmission accuracy test is qualified, otherwise the transmission accuracy test is unqualified;

[0045] 1.3. The test system performs a transmission power test on the radio station under test: If the power values ​​corresponding to the frequencies transmitted by the radio station under test collected by the spectrum analyzer in step 1.2 are all within 100W±1.5dB, the transmission power test is qualified, otherwise the transmission power test is unqualified;

[0046] 1.4. The test system performs a third-order intermodulation test on the radio station under test. The specific test process is as follows:

[0047] 1.4-1. Sort the frequencies transmitted by the radio stations under test in step 1.2 from low to high;

[0048] 1.4-2. The test system calculates the number of channels corresponding to each frequency according to the minimum channel spacing; and calculates the difference between the numbers of adjacent channels and the sum of the differences;

[0049] 1.4-3. The test system analyzes whether the difference and sum values ​​have the same number: if there is the same number, third-order intermodulation is required and the intermodulation value is calculated. If there is no same number, third-order intermodulation is not required, and the third-order intermodulation test is qualified; when third-order intermodulation occurs, the test system analyzes its intermodulation value: if the intermodulation value is <-25, the third-order intermodulation test is qualified, otherwise the third-order intermodulation test is unqualified;

[0050] 1.5. The test system performs a transmitter protection test on the radio station under test, that is, the test system tests the protection strategy of the transmitter in the radio station under test: if the transmitter can continue to work within the specified time and under overvoltage or overcurrent conditions, the transmitter protection test is qualified, otherwise the transmitter protection test is unqualified;

[0051] 1.6. The test system performs a continuous transmission test on the radio station under test, including continuous B state (0) and continuous Y state (1): the spectrum analyzer collects the power values ​​corresponding to the frequencies under different states transmitted by the radio station under test, and calculates the power deviation corresponding to the same frequency under different transmission states: if the power deviation in the continuous B state and Y state is ≤2dB, the continuous transmission test is qualified, otherwise the continuous transmission test is unqualified;

[0052] 1.7. The test system performs a receiving frequency accuracy test on the radio station under test: the test system sends a specified frequency value to the radio station under test, collects the received frequency value of the radio station under test through the audio analyzer, and calculates the frequency difference with the sent frequency value, in units of Hz: if the frequency difference is within 10Hz, the receiving frequency accuracy test is qualified, otherwise the receiving frequency accuracy test is unqualified;

[0053] 1.8. The test system performs J3E sensitivity test on the radio under test: the test system sends J3E type signals to the radio under test, collects the power, noise and other parameters of the frequency received by the radio under test through the audio analyzer, and calculates the amplitude under the condition of SINAD = 20dB, in dBu: if the amplitude is ≤ +15.6dBuV, the J3E sensitivity test is qualified, otherwise the J3E sensitivity test is unqualified;

[0054] 1.9. The test system performs F1B sensitivity test on the radio station under test: the test system sends F1B type signals to the radio station under test, collects the received frequency value of the radio station under test through the audio analyzer, and compares it with the sent frequency value to calculate its bit error rate BER: if BER<0.01, the F1B sensitivity test is qualified, otherwise the F1B sensitivity test is unqualified;

[0055] 1.10. The test system performs a power anomaly test on the radio station under test: the programmable power supply collects information such as the output voltage / current, calibration constants and output mode of the radio station under test: if all indicators are within the allowable range, the power anomaly test is qualified; if any indicator is not within the allowable range, the power anomaly test is unqualified.

[0056] As a preferred solution, the radio station power fine-tuning operation is performed as follows:

[0057] Step 1. Set the test system power supply to 13.8v / 27A and turn on the power output;

[0058] Step 2: The host system generates power-on command data and radio communication test data according to Table 1, and sends them to the line logic controller; the line logic controller performs a communication test on the radio under test: if the radio under test continuously communicates normally, execute step 3; otherwise, repeat this step to test the next radio;

[0059] Step 3. Set the host system to the audio signal source: set the frequency of the first audio to 1.1KHz under "AF Gen1 Freq", set it to audio output under "AF Gen1 To", and set the amplitude to 117.8dBuv; set the frequency of the second audio to 1.7KHz under "AF Gen2Freq", set it to audio output under "AF Gen2 To", and set the amplitude to 117.8dBuv;

[0060] Step 4: The host system generates a radio station setting instruction and a radio station Tx frequency setting instruction according to Table 1, and sends them to the line logic controller; the line logic controller performs corresponding settings on the radio station under test: if the settings are successful, execute step 5; otherwise, test the next radio station and go to step 2;

[0061] Step 5: The host system generates a PTT ON setting instruction according to Table 1 and sends it to the line logic controller; the line logic controller performs corresponding settings; then, the spectrum analyzer reads the power value of the radio station under test and records it;

[0062] Step 6, the host system generates a PTT OFF setting instruction according to Table 1, and sends it to the line logic controller; the line logic controller performs corresponding settings; at the same time, the host system performs relevant settings for the audio signal source: set it to off under "AF Gen1" and set it to off under "AF Gen2";

[0063] Step 7, the host system generates a radio station setting instruction and a radio station dot frequency setting instruction according to Table 1, and sends them to the line logic controller; the line logic controller performs corresponding settings on the radio station under test: if the settings are successful, execute step 11; otherwise, test the next radio station and go to step 2;

[0064] Step 8: The host system continuously transmits B(0) to the radio station under test; at the same time, the spectrum analyzer reads the power value of the radio station under test: if the power value is <60w or >250w, the radio station power is normal, and step 12 is executed; otherwise, the next radio station is tested and the process goes to step 2;

[0065] Step 9, the host system determines the number of power fine-tuning times. If the number of power fine-tuning times is ≠3, go to step 10; if the number of power fine-tuning times is 3, the power fine-tuning times counter is reset and the test ends;

[0066] Step 10: The host system generates an SSB power fine-tuning instruction and a DSC power fine-tuning instruction according to Table 1, and sends them to the line logic controller; the line logic controller performs corresponding settings; then, the power fine-tuning times counter is incremented by 1, and the process goes to step 4.

[0067] As a preferred solution, the automatic test system also includes a shared cloud for storing measurement data and test results obtained by the host system.

[0068] The beneficial effects of the present invention are:

[0069] The present invention uses an automatic test system for medium and high frequency radio stations to replace manual test methods, thereby simplifying the test process, lowering the technical requirements for testers, and reducing the labor intensity of workers. When the line logic controller communicates with the radio station under test, an RS-422 serial communication interface is used, which has separate sending and receiving channels, so there is no need to control the data direction, and supports point-to-multipoint two-way communication.

[0070] The present invention is provided with a self-diagnosis function through the medium and high frequency radio station automatic test system, which can automatically detect the status of the circuit and the communication line during the test process, analyze the cause of the abnormality when an abnormality occurs, and prompt the operator to handle it, thereby improving the operator's fault handling efficiency;

[0071] The medium and high frequency radio station automatic test system of the present invention can automatically complete the setting of relevant parameters in the radio station power fine-tuning test, avoiding errors caused by operator negligence and improving the automation and intelligence of the test system.

[0072] The medium and high frequency radio automatic test system of the present invention provides radio whole machine test and power fine adjustment test item selection, and the test system can perform batch test on 8 radio stations at one time, thereby improving the test efficiency;

[0073] The medium and high frequency radio station automatic test system of the present invention automatically saves the data generated during the test process in a shared cloud, which is convenient for testers to call; at the same time, the system automatically displays the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] Figure 1 The composition diagram of the medium and high frequency radio station automatic test system of the present invention is

[0075] Figure 2 Flow chart of the testing method of the testing system of the present invention

[0076] Figure 3 The test flow chart of the whole machine test of the present invention is

[0077] Figure 4 The test flow chart of the power fine-tuning of the present invention is

[0078] In the figure: 1-host system, 2-switch, 3-audio analyzer, 4-frequency meter, 5-spectrum analyzer,

[0079] 6-junction box, 7-power supply of the device under test, 8-line logic controller, 9-alarm, 10-GPS RS-422 serial communication interface, 11-power interface, 12-radio DSC interface, 13-radio SSB interface, 14-display controller, 15-radio under test placement rack, 16-radio under test, 17-shared cloud. DETAILED DESCRIPTION

[0080] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0081] like Figure 1 The automatic test system for medium and high frequency radio stations includes a host system 1, a switch 2, an audio analyzer 3, a frequency meter 4, a spectrum analyzer 5, a junction box 6, a line logic controller 8, a display controller 14, a test radio station placement rack 15 and a shared cloud 17. The line logic controller 8 includes a GPS RS-422 serial communication interface 10 for communicating with the test radio station 16, a test equipment power supply 7 and a power supply interface 11 for powering the test radio station 16, a radio DSC interface 12 for DSC power testing, and a radio SSB interface 13 for SSB power testing.

[0082] The host system 1 uses Ethernet to communicate with the audio analyzer 3, the frequency meter 4, and the spectrum analyzer 5 through the switch 2 to obtain the working status information of the audio analyzer 3, the frequency meter 4, and the spectrum analyzer 5 and the test data of the tested radio station 16; the line logic controller 8 communicates with the tested radio station 16 through the GPS RS-422 serial communication interface 10, sends control instructions to the tested radio station 16, and obtains the working status information and test data of the tested radio station 16. In addition, the host system 1 uses Ethernet to communicate with the junction box 6, the line logic controller 8, and the display controller 14 through the switch 2 to transmit the working status information of the audio analyzer 3, the frequency meter 4, the spectrum analyzer 5, and the tested radio station 16 and the measurement data of the tested radio station 16 obtained by the host system 1 to the display controller 14.

[0083] The host system 1 sends a radio test signal to the line logic controller 8 via Ethernet. The line logic controller 8 makes a signal judgment and controls the corresponding test equipment (audio analyzer 3, frequency meter 4 or spectrum analyzer 5) to obtain the measured data from the radio station 16 under test via the radio frequency line, and transmits the measured data to the host system 1 via Ethernet. The host system 1 inputs the test result to the display controller 14 via Ethernet for display. At the same time, the host system 1 uploads the measured data and test result to the shared cloud 17 for storage.

[0084] like Figure 2 and Figure 3 As shown, the automatic test method of medium and high frequency radio stations, the process is as follows:

[0085] Step 1: Start the test system

[0086] 1.1. The operator places eight radio stations 16 under test on the radio station placement rack 15;

[0087] 1.2. The operator connects the power line, communication line, DSC test line and SSB test line of the radio station 16 under test to the power interface 11, GPS RS-422 serial communication interface 10, radio station DSC interface 12 and radio station SSB interface 13 of the line logic controller 8 respectively;

[0088] 1.3. The operator powers on the test system and opens the test software in the host system 1.

[0089] Step 2: Test mode selection

[0090] The operator selects the test mode of the tested radio station 16 as the whole machine test or the radio station power fine-tuning mode on the host system 1, generates the test mode data according to Table 1, and transmits them to the line logic controller 8 and the display controller 14 respectively; at the same time, adds the work station number, generates the transmission data according to Table 1, and transmits them to the line logic controller 8;

[0091] Table 1 Data transmission format specification table

[0092]

[0093]

[0094] The source address and the destination address are defined as follows: the ID of the host system 1 is 01; the ID of the line logic controller 8 is 02; the ID of the display controller 14 is 03;

[0095] Workstation number: 01~08 represents workstation 01 to workstation 08 respectively;

[0096] Test mode: 01 means whole machine test, 02 means power fine-tuning;

[0097] The instruction codes in Table 1 are shown in Table 2;

[0098] Table 2 Directive representative specification table

[0099] Code meaning Code meaning F0 Test mode settings 03 SSB power factor reading instruction F1 Stop the entire system test 04 DSC power factor reading instruction F2 Test station status 05 Radio mode settings F3 Stop the current station test 06 Radio TX frequency setting FC System working status: voltage, current 07 Radio station tuning status FD handshake communication 08 Open PTT FE Test instrument working status 09 Turn off PTT FF Error Type 0b Radio frequency setting 01 System Power On 0C Radio SSB power fine-tuning coefficient setting 02 Radio communication test 0D Radio DSC power fine-tuning coefficient setting 0E Radio power test setup complete

[0100] Step 3: Automatic test system self-diagnosis

[0101] 3.1. Handshake communication

[0102] The host system 1 performs a handshake protocol with the line logic controller 8 every 1 second. The specific process is as follows:

[0103] 3.1-1, the host system 1 generates communication data according to Table 1, and performs handshake communication data transmission with the line logic controller 8 and the radio station under test 16 through the PING IP command;

[0104] 3.1-2, the host system 1 performs a continuous state detection: if the continuous state detection is normal, go to step 3.2; if the continuous state detection is abnormal, execute step 3.1-3;

[0105] 3.1-3. The host system 1 performs error information analysis: if the error information is an instrument connection error or a line logic controller connection error, the test is stopped; if the error information is a current station connection error, the test of the current station is stopped;

[0106] 3.1-4, the host system 1 determines whether there is a waiting test station: if there is a waiting test station, go to step 2; if there is no waiting test station, the test ends;

[0107] 3.2. Real-time status monitoring of the test system

[0108] The host system 1 reads the current and voltage of the power supply every 1 second, and the line logic controller 8 detects the line working current and voltage every 1 second; the line logic controller 8 generates current and voltage data according to Table 1 and transmits it to the host system 1;

[0109] 3.3、Test station status check

[0110] 3.3-1. The line logic controller 8 performs a station status check to detect whether the number of the radio station 16 under test can be read. If the radio station number is not detected, go to step 3.3-2. If the radio station number is detected, go to step 3.3-4.

[0111] 3.3-2. An error message is displayed on the host system 1, and the worker is prompted to troubleshoot the fault, and the worker performs troubleshooting;

[0112] 3.3-3, the line logic controller 8 continues to check the station status. If the station number is not detected, go to step 3.3-2. If the station number is detected, go to step 3.3-4.

[0113] 3.3-4. The host system 1 determines whether there is a station currently being tested. If there is a station being tested, it is added to the waiting test queue; if there is no station being tested, the whole radio is tested or the radio power is fine-tuned.

[0114] The specific process of the whole machine test operation is as follows:

[0115] 1.1. Communication test and power supply overvoltage test. The specific test process is as follows:

[0116] 1.1-1. Radio communication test, i.e. the test system and the tested radio 16 send signals to each other. If the tested radio 16 or the test system fails to receive the signal, the communication fails and the alarm 9 sends an alarm signal to prompt the tester to troubleshoot the problem;

[0117] 1.1-2. Power supply overvoltage test, i.e. obtaining the power supply voltage of the test system through the program-controlled power supply. If the voltage is within the allowable range, the test ends. If the voltage is not within the allowable range, the alarm 9 sounds an alarm to prompt the tester to troubleshoot;

[0118] 1.2. The test system performs a transmission frequency accuracy test on the radio station 16 under test: the transmission frequency value of the radio station 16 under test is changed by an attenuator; the frequency meter 4 collects the a-time (a≥5) frequency value (unit: Hz) transmitted by the radio station 16 under test, and at the same time, the spectrum analyzer 5 collects the power value corresponding to the frequency transmitted by the radio station 16 under test. If the frequency difference between the two is within ±10Hz, the transmission accuracy test is qualified, otherwise the transmission accuracy test is unqualified;

[0119] 1.3. The test system performs a transmission power test on the radio station 16 under test: if the power values ​​corresponding to the frequencies transmitted by the radio station 16 under test collected by the spectrum analyzer 5 in step 1.2 are all within 100W±1.5dB, the transmission power test is qualified, otherwise the transmission power test is unqualified;

[0120] 1.4. The test system performs a third-order intermodulation test on the radio station 16 under test. The specific test process is as follows:

[0121] 1.4-1. Sort the frequencies transmitted by the radio station 16 under test in step 1.2 from low to high;

[0122] 1.4-2. The test system calculates the number of channels corresponding to each frequency according to the minimum channel spacing; and calculates the difference between the numbers of adjacent channels and the sum of the differences;

[0123] 1.4-3. The test system analyzes whether the difference and sum values ​​have the same number: if there is the same number, third-order intermodulation is required and the intermodulation value is calculated. If there is no same number, third-order intermodulation is not required, and the third-order intermodulation test is qualified; when third-order intermodulation occurs, the test system analyzes its intermodulation value: if the intermodulation value is <-25, the third-order intermodulation test is qualified, otherwise the third-order intermodulation test is unqualified;

[0124] 1.5. The test system performs a transmitter protection test on the radio station 16 under test, that is, the test system tests the protection strategy of the transmitter in the radio station 16 under test, such as overvoltage protection, overcurrent protection, etc.: if the transmitter can continue to work within the specified time and under overvoltage or overcurrent conditions, the transmitter protection test is qualified, otherwise the transmitter protection test is unqualified;

[0125] 1.6. The test system performs a continuous transmission test on the radio station 16 under test (continuous B state (0) and continuous Y state (1)): the spectrum analyzer 5 collects the power values ​​(unit W) corresponding to the frequencies under different states transmitted by the radio station 16 under test, and calculates the power deviation (unit W) corresponding to the power of the same frequency under different transmission states: if the power deviation of the continuous B state and the Y state is ≤2dB, the continuous transmission test is qualified, otherwise the continuous transmission test is unqualified;

[0126] 1.7. The test system performs a receiving frequency accuracy test on the radio station 16 under test: the test system sends a specified frequency value to the radio station 16 under test, collects the received frequency value of the radio station 16 under test through the audio analyzer 3, and calculates the frequency difference (in Hz) with the sent frequency value: if the frequency difference is within 10 Hz, the receiving frequency accuracy test is qualified, otherwise the receiving frequency accuracy test is unqualified;

[0127] 1.8. The test system performs a J3E sensitivity test on the radio station 16 under test: the test system sends a J3E type signal to the radio station 16 under test, collects the power, noise and other parameters of the frequency received by the radio station 16 under test through the audio analyzer 3, and calculates the amplitude (in dBu) under the condition of SINAD = 20 dB: if the amplitude is ≤ +15.6 dBuV, the J3E sensitivity test is qualified, otherwise the J3E sensitivity test is unqualified;

[0128] 1.9. The test system performs an F1B sensitivity test on the radio station 16 under test: the test system sends an F1B type signal to the radio station 16 under test, collects the received frequency value of the radio station 16 under test through the audio analyzer 3, and compares it with the transmitted frequency value, and calculates its bit error rate (BER): if BER<0.01, the F1B sensitivity test is qualified, otherwise the F1B sensitivity test is unqualified;

[0129] 1.10. The test system performs a power supply abnormality test on the radio station 16 under test: the program-controlled power supply collects information such as the output voltage / current, calibration constant and output mode of the radio station 16 under test: if all indicators are within the allowable range, the power supply abnormality test is qualified; if any indicator is not within the allowable range, the power supply abnormality test is unqualified;

[0130] like Figure 2 and Figure 4 As shown, the radio power is fine-tuned, and the process is as follows:

[0131] Step 1. Set the test system power supply to 13.8v / 27A and turn on the power output;

[0132] Step 2, the host system 1 generates power-on instruction data and radio communication test data according to Table 1, and sends them to the line logic controller 8; the line logic controller 8 performs a communication test on the radio station 16 under test: if the radio station 16 under test continuously communicates normally, execute step 3; otherwise, test the next radio station and go to step 2;

[0133] Step 3. Host system 1 performs relevant settings for the audio signal source: set the frequency of the first audio to 1.1KHz under "AF Gen1 Freq", set it to audio output under "AF Gen1 To", and set the amplitude to 117.8dBuv; set the frequency of the second audio to 1.7KHz under "AFGen2 Freq", set it to audio output under "AF Gen2 To", and set the amplitude to 117.8dBuv;

[0134] Step 4, the host system 1 generates a radio station setting instruction and a radio station Tx frequency setting instruction according to Table 1, and sends them to the line logic controller 8; the line logic controller 8 performs corresponding settings on the radio station 16 under test: if the settings are successful, execute step 5; otherwise, test the next radio station and go to step 2;

[0135] Step 5, the host system 1 generates a PTT ON setting instruction according to Table 1, and sends it to the line logic controller 8; the line logic controller 8 performs corresponding settings; then, the spectrum analyzer 5 reads the power value of the radio station 16 under test and records it;

[0136] Step 6, the host system 1 generates a PTT OFF setting instruction according to Table 1, and sends it to the line logic controller 8; the line logic controller 8 performs corresponding settings; at the same time, the host system 1 performs relevant settings of the audio signal source: set it to off under "AF Gen1" and set it to off under "AF Gen2";

[0137] Step 7, the host system 1 generates a radio station setting instruction and a radio station dot frequency setting instruction according to Table 1, and sends them to the line logic controller 8; the line logic controller 8 performs corresponding settings on the radio station 16 under test: if the settings are successful, execute step 8; otherwise, test the next radio station and go to step 2;

[0138] Step 8, the host system 1 continuously transmits B(0) to the radio station 16 under test; at the same time, the spectrum analyzer 5 reads the power value of the radio station 16 under test: if the power value is <60w or >250w, the radio station power is normal, and step 9 is executed; otherwise, the next radio station is tested and the process goes to step 2;

[0139] Step 9, the host system 1 determines the number of power fine-tuning times. If the number of power fine-tuning times is ≠3, go to step 10; if the number of power fine-tuning times is 3, the power fine-tuning times counter is reset and the test ends.

[0140] Step 10, the host system 1 generates the SSB power fine-tuning instruction and the DSC power fine-tuning instruction according to Table 1, and sends them to the line logic controller 8; the line logic controller 8 performs corresponding settings; then, the power fine-tuning times counter is incremented by 1, and the process goes to step 4.

[0141] The above-mentioned embodiments are only illustrative of the principles and effects of the invention, as well as some embodiments of its application, and are not intended to limit the invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the invention, and all of these belong to the protection scope of the invention.

Claims

1. A method for automatic testing of medium and high frequency radio stations, characterized in that: the automatic testing system adopted by the method comprises a host system, a switch, an audio analyzer, a frequency meter, a spectrum analyzer, a junction box, a line logic controller, a display controller, and a stand for placing the radio station under test; The line logic controller includes a GPS RS-422 serial communication interface for communicating with the radio under test, a device under test power supply and power supply interface for powering the radio under test, a radio DSC interface for DSC power testing, and a radio SSB interface for SSB power testing; The host system uses Ethernet to communicate with the audio analyzer, frequency meter, and spectrum analyzer through a switch to obtain the working status information of the audio analyzer, frequency meter, and spectrum analyzer as well as the test data of the radio station under test; The line logic controller communicates with the radio station under test through the GPS RS-422 serial communication interface, sends control instructions to the radio station under test, and obtains the working status information and test data of the radio station under test; the host system uses Ethernet to communicate with the junction box, line logic controller, and display controller through the switch, and transmits the audio analyzer, frequency meter, spectrum analyzer, working status information of the radio station under test and the measurement data of the radio station under test obtained by the host system to the display controller; the line logic controller is equipped with an alarm; The host system sends a radio test signal to the line logic controller via Ethernet. The line logic controller makes a signal judgment and controls the audio analyzer, frequency meter or spectrum analyzer to obtain the measured data from the radio station under test via the radio frequency line, and transmits the measured data to the host system via Ethernet. The host system transmits the test result to the display controller via Ethernet for display. The specific process of the radio station test method of the automatic test system is as follows: Step 1: Start the test system 1.

1. The operator places 8 radio stations under test on the radio station placement rack; 1.

2. The operator connects the power line, communication line, DSC test line and SSB test line of the radio station under test to the power interface, GPS RS-422 serial communication interface, radio station DSC interface and radio station SSB interface of the line logic controller respectively; 1.

3. The operator powers on the test system and opens the test software in the host system; Step 2: Test mode selection The operator selects the test mode of the radio station under test as the whole machine test or the power fine-tuning mode on the host system, generates the test mode data according to the table, and transmits them to the line logic controller and the display controller respectively; at the same time, the station number is added, and the transmission data is generated according to Table 1, and transmitted to the line logic controller; Table 1 Data transmission format specification table The source address and destination address are defined as follows: the host system ID is 01; the line logic controller ID is 02; the display controller ID is 03; Workstation number: 01~08 represents workstation 01 to workstation 08 respectively; Test mode: 01 means whole machine test, 02 means power fine-tuning; The specific contents of the instruction codes in Table 1 are shown in Table 2; Table 2 Directive representative specification table Step 3: Automatic test system self-diagnosis 3.

1. Handshake communication The host system performs a handshake protocol with the line logic controller every 1 second. The specific process is as follows: 3.1-1. The host system generates communication data according to Table 1, and performs handshake communication data transmission with the line logic controller and the radio under test through the PING IP command; 3.1-2. The host system performs continuous status detection: If the continuous status detection is normal, go to step 3.2; if the continuous status detection is abnormal, perform step 3.1-3; 3.1-3. The host system performs error information analysis: if the error information is an instrument connection error or a line logic controller connection error, the test is stopped; if the error information is a current station connection error, the test of the current station is stopped; 3.1-4. The host system determines whether there is a waiting test station: if there is a waiting test station, go to step 2; if there is no waiting test station, the test ends; 3.

2. Real-time status monitoring of the test system The host system reads the current and voltage of the power supply every 1 second, and the line logic controller detects the line working current and voltage every 1 second; The line logic controller generates current and voltage data according to Table 1 and transmits it to the host system; 3.3、Test station status check 3.3-1. The line logic controller performs a station status check to detect whether the number of the radio station under test can be read. If the radio station number is not detected, go to step 3.3-2. If the radio station number is detected, go to step 3.3-4. 3.3-2. Display error information on the host system and prompt workers to troubleshoot the faults. Workers then perform troubleshooting. 3.3-3, the line logic controller continues to check the station status. If the radio station number is not detected, go to step 3.3-2. If the radio station number is detected, go to step 3.3-4. 3.3-4. The host system determines whether there is a station under test. If there is a station under test, it will be added to the waiting test queue; if there is no station under test, the radio will be tested as a whole or the radio power will be fine-tuned.

2. A medium and high frequency radio station automatic testing method as claimed in claim 1, characterized in that: the whole machine test comprises the following steps: Step 1: Communication test and power supply overvoltage test. The specific test process is as follows: 1.1-1. Radio communication test, i.e. the test system and the tested radio send signals to each other. If either the tested radio or the test system fails to receive the signal, the communication fails and the alarm sends an alarm signal to prompt the tester to troubleshoot the problem. 1.1-2. Power supply overvoltage test, that is, obtain the power supply voltage of the test system through the program-controlled power supply. If the voltage is within the allowable range, the test ends. If the voltage is not within the allowable range, the alarm sounds an alarm to prompt the tester to troubleshoot the problem; 1.

2. The test system performs a transmission frequency accuracy test on the radio station under test: the transmission frequency value of the radio station under test is changed through the attenuator; the frequency meter collects the a-frequency value transmitted by the radio station under test, in units of Hz, a≥5, and at the same time, the spectrum analyzer collects the power value corresponding to the frequency transmitted by the radio station under test. If the frequency difference between the two is within ±10Hz, the transmission accuracy test is qualified, otherwise the transmission accuracy test is unqualified; 1.

3. The test system performs a transmission power test on the radio station under test: If the power values ​​corresponding to the frequencies transmitted by the radio station under test collected by the spectrum analyzer in step 1.2 are all within 100W±1.5dB, the transmission power test is qualified, otherwise the transmission power test is unqualified; 1.

4. The test system performs a third-order intermodulation test on the radio station under test. The specific test process is as follows: 1.4-1. Sort the frequencies transmitted by the radio stations under test in step 1.2 from low to high; 1.4-2. The test system calculates the number of channels corresponding to each frequency according to the minimum channel spacing; and calculates the difference between the numbers of adjacent channels and the sum of the differences; 1.4-3. The test system analyzes whether the difference and sum values ​​have the same number: if there is the same number, third-order intermodulation is required and the intermodulation value is calculated. If there is no same number, third-order intermodulation is not required, and the third-order intermodulation test is qualified; when third-order intermodulation occurs, the test system analyzes its intermodulation value: if the intermodulation value is <-25, the third-order intermodulation test is qualified, otherwise the third-order intermodulation test is unqualified; 1.

5. The test system performs a transmitter protection test on the radio station under test, that is, the test system tests the protection strategy of the transmitter in the radio station under test: if the transmitter can continue to work within the specified time and under overvoltage or overcurrent conditions, the transmitter protection test is qualified, otherwise the transmitter protection test is unqualified; 1.

6. The test system performs a continuous transmission test on the radio station under test, including continuous B state (0) and continuous Y state (1): the spectrum analyzer collects the power values ​​corresponding to the frequencies under different states transmitted by the radio station under test, and calculates the power deviation corresponding to the same frequency under different transmission states: if the power deviation in the continuous B state and Y state is ≤2dB, the continuous transmission test is qualified, otherwise the continuous transmission test is unqualified; 1.

7. The test system performs a receiving frequency accuracy test on the radio station under test: the test system sends a specified frequency value to the radio station under test, collects the received frequency value of the radio station under test through the audio analyzer, and calculates the frequency difference with the sent frequency value, in units of Hz: if the frequency difference is within 10Hz, the receiving frequency accuracy test is qualified, otherwise the receiving frequency accuracy test is unqualified; 1.

8. The test system performs J3E sensitivity test on the radio under test: the test system sends J3E type signals to the radio under test, collects the power, noise and other parameters of the frequency received by the radio under test through the audio analyzer, and calculates the amplitude under the condition of SINAD = 20dB, in dBu: if the amplitude is ≤ +15.6dBuV, the J3E sensitivity test is qualified, otherwise the J3E sensitivity test is unqualified; 1.

9. The test system performs F1B sensitivity test on the radio station under test: the test system sends F1B type signals to the radio station under test, collects the received frequency value of the radio station under test through the audio analyzer, and compares it with the sent frequency value to calculate its bit error rate BER: if BER<0.01, the F1B sensitivity test is qualified, otherwise the F1B sensitivity test is unqualified; 1.

10. The test system performs a power anomaly test on the radio station under test: the programmable power supply collects information such as the output voltage / current, calibration constants and output mode of the radio station under test: if all indicators are within the allowable range, the power anomaly test is qualified; if any indicator is not within the allowable range, the power anomaly test is unqualified.

3. A medium and high frequency radio station automatic testing method as claimed in claim 1, characterized in that: The process of the radio station power fine-tuning operation is as follows: Step 1. Set the test system power supply to 13.8v / 27A and turn on the power output; Step 2: The host system generates power-on command data and radio communication test data according to Table 1, and sends them to the line logic controller; the line logic controller performs a communication test on the radio under test: if the radio under test continuously communicates normally, execute step 3; otherwise, repeat this step to test the next radio; Step 3. Set the host system to the audio signal source: set the frequency of the first audio to 1.1KHz under "AF Gen1 Freq", set it to audio output under "AF Gen1 To", and set the amplitude to 117.8dBuv; set the frequency of the second audio to 1.7KHz under "AF Gen2Freq", set it to audio output under "AF Gen2 To", and set the amplitude to 117.8dBuv; Step 4: The host system generates a radio station setting instruction and a radio station Tx frequency setting instruction according to Table 1, and sends them to the line logic controller; the line logic controller performs corresponding settings on the radio station under test: if the settings are successful, execute step 5; otherwise, test the next radio station and go to step 2; Step 5, the host system generates a PTT ON setting instruction according to Table 1, and sends it to the line logic controller; the line logic controller performs corresponding settings; Then, the spectrum analyzer reads the power value of the radio station under test and records it; Step 6, the host system generates a PTT OFF setting instruction according to Table 1, and sends it to the line logic controller; the line logic controller performs corresponding settings; at the same time, the host system performs relevant settings for the audio signal source: set it to off under "AF Gen1" and set it to off under "AF Gen2"; Step 7, the host system generates a radio station setting instruction and a radio station dot frequency setting instruction according to Table 1, and sends them to the line logic controller; the line logic controller performs corresponding settings on the radio station under test: if the settings are successful, execute step 11; otherwise, test the next radio station and go to step 2; Step 8: The host system continuously transmits B(0) to the radio station under test; at the same time, the spectrum analyzer reads the power value of the radio station under test: if the power value is <60w or >250w, the radio station power is normal, and step 12 is executed; otherwise, the next radio station is tested and the process goes to step 2; Step 9, the host system determines the number of power fine-tuning times. If the number of power fine-tuning times is ≠3, go to step 10; if the number of power fine-tuning times is 3, the power fine-tuning times counter is reset and the test ends; Step 10: The host system generates an SSB power fine-tuning instruction and a DSC power fine-tuning instruction according to Table 1, and sends them to the line logic controller; the line logic controller performs corresponding settings; then, the power fine-tuning times counter is incremented by 1, and the process goes to step 4.

4. A medium and high frequency radio automatic testing method as claimed in any one of claims 1 to 3, characterized in that: The automatic test system also includes a shared cloud for storing measurement data and test results obtained by the host system.

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