MHT4039-2013 English PDFUS$349.00 ยท In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. MHT4039-2013: L band primary surveillance radar for ATC.Test methods Status: Valid
Basic dataStandard ID: MH/T 4039-2013 (MH/T4039-2013)Description (Translated English): L band primary surveillance radar for ATC.Test methods Sector / Industry: Civil Aviation Industry Standard (Recommended) Word Count Estimation: 14,156 Date of Issue: 10/5/2013 Date of Implementation: 1/8/2013 Issuing agency(ies): Civil Aviation Administration of China MHT4039-2013: L band primary surveillance radar for ATC.Test methods---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.L band primary surveillance radar for ATC.Test methods ICS 33.200 M 53 MH Civil Aviation Industry Standard of the People's Republic of China Air traffic control L-band primary surveillance radar testing method 2013-05-10 released 2013-08-01 implementation Issued by Civil Aviation Administration of China ForewordThis standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by the Air Traffic Control Industry Management Office of the Civil Aviation Administration of China. This standard was approved by the Aircraft Airworthiness Certification Department of the Civil Aviation Administration of China. This standard is under the jurisdiction of the China Academy of Civil Aviation Science and Technology. Drafting organizations of this standard. Technology Center of Air Traffic Management Bureau of Civil Aviation Administration of China, Nanjing Enruit Industrial Co., Ltd. The main drafters of this standard. Tian Zhencai, Guo Jing, Li Bing, Ren Sen, Li Hangyu, Feng Bing, Tao Jing. Air traffic control L-band primary surveillance radar test method1 ScopeThis standard specifies the test methods for the main indicators of the L-band primary surveillance radar equipment for civil aviation air traffic control. This standard applies to the testing of L-band primary surveillance radar equipment for civil aviation air traffic control.2 Normative referencesThe following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. The verification test of failure rate and mean time between failures under the assumption of constant failure rate in GB/T 5080.7-1986 equipment reliability test Program GB 6364 Electromagnetic environment requirements for aeronautical radio navigation stations MH/T 4003 radio navigation station and air traffic control radar station setting site specifications MH/T 4032 Civil Aviation Flight Check Technical Requirements Radar MH/T 4038 L-band primary surveillance radar technical requirements for air traffic control 3 Terms, definitions and abbreviations 3.1 Terms and definitions The terms and definitions established in MH/T 4038 apply to this document. 3.2 Abbreviations The following abbreviations apply to this document. GNSS global navigation satellite system PPI plane position indicator STC sensitivity-time control4 General requirements4.1 Radar under test The radar under test should be in the state specified in the radar product manual before the various indicators are tested, the equipment should be intact and work stable. 4.2 Test environment 4.2.1 The wind at the test site should not be greater than level 3, and the weather should be fine. 4.2.2 The electromagnetic environment around the test site should meet the requirements of GB 6364. 4.2.3 The obstacle environment around the test site should meet the requirements of MH/T 4003. 4.3 Test equipment and instruments 4.3.1 Test equipment and instrument test capabilities should cover the indicators of the radar to be tested. 4.3.2 The self-made test equipment shall be approved by the competent authority of the industry before being used. 4.3.3 The test equipment and instruments should reach the specified accuracy. 4.3.4 Test equipment and instruments should be within the validity period of verification or calibration. 4.4 Test record 4.4.1 During the test, the original information and data related to the test results should be recorded in accordance with the test procedures for data processing. 4.4.2 The test record should include the following. --The basis, time, place, project, implementation process and participants of the test; --The name and code of the radar under test, and the model and identification date of all instruments; --Original data records, data processing methods and results.5 performance test5.1 Equipment composition inspection Count and record item by item according to the equipment composition table in the radar product manual. 5.2 Appearance quality inspection Use visual inspection and hand feel method to check the appearance quality of the whole radar. 5.3 Identification check In accordance with the provisions of the radar product manual, check the product part number and serial number of the radar and record them. 5.4 Radar transmitting frequency test 5.4.1 Test equipment Use a spectrum analyzer. 5.4.2 Test method Connect the radar excitation signal (milliwatt level) before power amplification directly to the spectrum analyzer, select the operating frequency point, and check the excitation signal on the spectrum analyzer. The frequency spectrum characteristics of the excitation signal are used to determine whether the radar is working at a specified frequency point. 5.5 Airspace coverage test Refer to the relevant regulations of MH/T 4032 for the test method. 5.6 Detection accuracy 5.6.1 Test preparation 5.6.1.1 The detection accuracy test of the radar can be carried out simultaneously with the coverage test. 5.6.1.2 If the target aircraft is equipped with high-precision GNSS equipment, the data recorded by the high-precision GNSS equipment on the target aircraft during the test As the test benchmark data. 5.6.1.3 When there are high-precision measuring equipment such as secondary radar, the data recorded by the high-precision measuring equipment can also be used as reference data. 5.6.1.4 The inspected radar should be able to receive GNSS timing and make corresponding records. Before the start of the test, the time and Calibrate the GNSS time recorded in the reference device and record the time difference. 5.6.2 Test method 5.6.2.1 Data collection 5.6.2.1.1 The admission content and rate of the inspected radar are the same as the admission method of the radar coverage test. Data acquisition and radar coverage The admission of the coverage test can be carried out at the same time. 5.6.2.1.2 The inspected radar shall record the batch number, azimuth, distance and time stamp of the detected target aircraft. 5.6.2.2 Data processing 5.6.2.2.1 The data measured by the reference equipment shall be converted into the data with the tested radar as the origin of the coordinates. 5.6.2.2.2 Take the time sequence of the track coordinate data of the target aircraft measured by the inspected radar, and compare the time of the reference equipment measurement data with the time of the inspected radar. After the radar measurement data is time aligned, the difference of this measurement is calculated. 5.6.2.2.3 Abnormal data caused by external objective reasons in the recorded data sample can be eliminated. The difference data after removing the abnormal data is used as Root mean square error analysis and processing, the test results should meet the requirements of the radar product manual. 5.7 Resolution 5.7.1 The resolution of the radar can be obtained by testing the signal main lobe width and antenna beam width after pulse compression. 5.7.2 The range resolution of radar is calculated as follows. 5.7.3 The azimuth resolution is equal to the antenna azimuth beam width (in degrees). 5.7.4 See Chapter 9 for pulse pressure test, and Chapter 6 for antenna azimuth beamwidth test. 5.7.5 The test results should meet the requirements of the radar product manual. 5.8 Meteorological detection capability 5.8.1 Test equipment Use signal source. 5.8.2 Test method 5.8.2.1 Connect the signal output by the signal source from the input of the receiver. 5.8.2.2 The control signal source works at the operating frequency of the radar and outputs analog weather signals. 5.8.2.3 Record the actual output power of the signal source corresponding to the 6 different meteorological levels on the PPI display screen, and the test results should conform to the radar Product manual requirements. 5.9 Target visibility in clutter 5.9.1 Test equipment Use oscilloscope, variable attenuator, signal generator. 5.9.2 Test method 5.9.2.1 The radar is powered on and working normally. Manually rotate the antenna to point to the selected reference object position, connect the oscilloscope to the receiver, Observe the distance position and amplitude of the ground object echo. The selected ground object echo distance position should be in the non-STC area, and the amplitude should be 1 dB lower than the saturation level the above. After selecting a feature, the antenna should be fixed on the location of the feature. 5.9.2.2 Radar simulation generates a fixed moving target signal, adjust the distance of the simulated target and the ground object at the same distance, adjust the attenuation The subtractor makes the amplitude of the fixed moving target signal basically equal to the amplitude of the ground object echo, and records the simulated target amplitude (A1) at this time. On the radar A fixed position analog target video signal should be displayed on the PPI screen of the monitor. 5.9.2.3 Attenuate the signal amplitude of the simulated target with an attenuator, observe the video signal of the simulated moving target displayed on the radar display, When the video signal attenuates to the minimum value that can still display the dot trace video, record the analog target amplitude (A2) at this time. 5.9.2.4 The visibility of the target in the clutter is equal to the difference between A1 and A2, and the measured value should meet the requirements of the radar product manual. 5.10 Channel switching 5.10.1 Manual switching of test methods When channel A is working and channel B is turned on, manually select the channel switching function at the monitoring and maintenance seat, and it will be displayed on the monitoring screen Prompt that the channel is switched successfully, and the channel changeover switch completes the switch. Observe the display screen, if the target track is continuous, it means manual switching success. When the B channel is working, manually switch to the A channel according to the above operation. 5.10.2 Automatic switching test method When channel A is working and channel B is turned on, the processing unit of channel A is turned off to simulate a fault, and the radar should be able to automatically switch to channel B The channel changeover switch completes the switch. Observe the display screen, if the target track is continuous, it indicates that the automatic switching is successful. When the B channel is working, it will automatically switch to the A channel according to the above operation. 5.11 Power consumption 5.11.1 Test equipment Use a clamp-on ammeter. 5.11.2 Test method The whole machine is working at full load, and the total three-phase AC input current is measured with a clamp ammeter to calculate the total power consumption. 5.12 Data output 5.12.1 Test equipment Use protocol analyzer. 5.12.2 Test method Connect the protocol analyzer to the radar target data output interface, and compare the received data with the format specified in the radar product manual Correct. 5.13 Reliability For test methods, see Chapter 5 of GB/T 5080.7-1986. 6 Antenna feeder sub-system test 6.1 Antenna performance 6.1.1 Test equipment Radar antenna testing generally adopts far-field lobe measurement method. The instruments used include spectrum analyzer, signal source, standard transmitting antenna, calculation Machine, attenuator, standard gain feed. 6.1.2 Test preparation 6.1.2.1 Choose a suitable test site. The test site should be flat and open, with a good electromagnetic environment, and minimize the impact of the surrounding environment. 6.1.2.2 The test distance should be greater than 1 650 m. Considering the influence of the ground, the launch point can move up and down within a height of.200 m. 6.1.2.3 Adjust the angle between the rotating plane of the turntable and the ground, and connect the instrument circuit according to Figure 1 to ensure that the instrument is well grounded. Figure 1 Diagram of the far-field lobe test system 6.1.3 Test method 6.1.3.1 Set the signal source and the working mode of the spectrum analyzer, adjust the working frequency and transmit power of the signal source, and ensure that the spectrum analyzer has sufficient dynamics range. 6.1.3.2 Adjust the position of the transmitting point and the elevation angle of the antenna so that the antenna is aligned with the maximum direction of the low beam. 6.1.3.3 Rotate the tested antenna, perform the low-beam horizontal lobe test at each frequency point of the radar antenna, print or draw the lobe diagram and The main parameter, record the test data, the azimuth interval of the half power point of the main beam is the azimuth beam width. 6.1.3.4 Adjust the position of the launch point and the elevation angle of the antenna so that the antenna is aligned with the maximum point of the high beam. 6.1.3.5 Rotate the tested antenna, perform the high-beam horizontal lobe test at each frequency point of the radar antenna, print or draw the lobe diagram and The main parameter, record the test data, the azimuth interval of the half power point of the main beam is the azimuth beam width. 6.1.3.6 The antenna gain test adopts the contrast method, which is suitable for the high and low beams of the radar antenna. Place the standard gain feed on the turntable and measure Calculate its level value (SL1) at each frequency point, and then measure the level value (SL2) of the radar antenna at the corresponding frequency point, and calculate the standard increase based on theory. The gain (G0) of the beneficial feed source at this frequency point, then the gain (G) of the radar antenna at this frequency point is. 6.2 Feeder performance 6.2.1 Test equipment A vector network analyzer is used to connect the waveguide. 6.2.2 Test method 6.2.2.1 Connect the instrument circuit according to Figure 2. Figure 2 Block diagram of feeder loss test 6.2.2.2 Test the loss value of the connected waveguide and record it. 6.2.2.3 Connect the high and low beam branches above the hinge with a connecting waveguide, and test the input from the transmitting end of the high-power circulator. Beam branch output, test its loss value, and record. 6.2.2.4 The difference between the above two levels of data is the required test feeder transmit and receive loss value. 6.2.2.5 Disassemble the waveguide transmitting and output to the circulator, and connect the network analyzer to the input port of the circulator for testing. Standing wave inside. 6.3 Antenna control The test method is. a) Turn on the radar (the transmitter may not be turned on); b) Set the antenna speed; c) After the rotation is stable, observe and record the antenna rotation period at the monitoring system; d) Take the average of the N antenna rotation period data values read at any time, and perform statistics respectively, and calculate the antenna period by the following formula Root mean square error of period. e) Calculate the root mean square error of the antenna rotation period according to the above method at multiple speeds. 6.4 Corner coding 6.4.1 Test equipment Use oscilloscope or angle code tester. 6.4.2 Test method 6.4.2.1 Turn on the radar (transmitting is not necessary). 6.4.2.2 Measure the azimuth incremental signal and the true north signal output by the angle encoder. 6.4.2.3 The effective bit (N) of the bearing code signal can be estimated by the following formula. 7 Launch sub-system test 7.1 Transmitter output power 7.1.1 Test equipment Use oscilloscope and peak power meter. 7.1.2 Test method 7.1.2.1 Connect the test instrument as shown in Figure 3. Figure 3 Transmitter output power and signal envelope test method 7.1.2.2 Turn on the transmitter. 7.1.2.3 Read the output power value on the peak power meter. 7.1.2.4 Calculate the peak power output by the transmitter according to the following formula. 7.2 Transmit pulse envelope 7.2.1 Test equipment Use digital oscilloscope, power meter (including detection function). 7.2.2 Test method 7.2.2.1 Connect the test equipment as shown in Figure 3. 7.2.2.2 Turn on the transmitter. 7.2.2.3 On the oscilloscope, read the envelope, rising edge and falling edge width of the transmitted signal. 7.2.2.4 Read the amplitude of the top fluctuation (A1) and the pulse amplitude (A2), the top fluctuation 7.3 Emission spectrum 7.3.1 Test equipment Use a spectrum analyzer. 7.3.2 Test method 7.3.2.1 Connect the test equipment as shown in Figure 4, and output the directional coupler signal to the spectrum analyzer. Figure 4 Connection diagram for testing spectrum characteristics of radar transmitter output signal 7.3.2.2 Turn on the transmitter. 7.3.2.3 Measure and record the harmonics of the transmitted signal. 7.3.2.4 Measure and record the out-of-band spurs of the transmitted signal.8 Receiving subsystem test8.1 Signal bandwidth 8.1.1 Test equipment Use a spectrum analyzer. 8.1.2 Test method Connect the radar excitation signal (in the order of milliwatts) before power amplification to the spectrum analyzer directly, select the operating frequency point, and read the half Power point bandwidth. 8.2 Receiving noise figure and sensitivity 8.2.1 Test equipment Use noise figure tester and noise source. 8.2.2 Test method 8.2.2.1 Turn off the STC function of the receiving system. 8.2.2.2 Connect the receiver and the meter as shown in Figure 5, and read the measured value of the noise figure of the receiving channel from the noise figure tester. Figure 5 Block diagram of noise figure test 8.2.2.3 Complete the noise figure test of the high and low beam channels and the meteorological channel according to the above methods. 8.2.2.4 The relationship between receiving sensitivity and noise figure can be calculated using the following formula. 8.3 Receive dynamic range and gain control 8.3.1 Test equipment Use spectrum analyzer and signal source. 8.3.2 Test method 8.3.2.1 Turn off the STC function of the receiving system. 8.3.2.2 On the premise of measuring the receiving noise figure, the sensitivity of the receiver is calculated according to the formula in 8.2.2.4. 8.3.2.3 Set the frequency of the spectrum analyzer and signal source to the operating frequency point of the radar. 8.3.2.4 Connect the receiver and the meter as shown in Figure 6. 8.3.2.5 Increase the signal source power until it reaches the 1 dB compression point P-1in. 8.3.2.6 The linear dynamic range is P-1in-Pmin. 8.3.2.7 Turn on the STC function of the receiving system, adjust the gain of the receiving channel, and observe that the output of the receiver should change accordingly. Figure 6 Input dynamic test block diagram 8.4 Incentive source 8.4.1 The test method of the output power of the excitation source is the same as that of the total output power of the transmitter (see 7.1). The test position is the output power of the excitation source. Out. 8.4.2 The spectrum test method of the output signal of the excitation source is the same as that of the transmitter output spectrum test method (see 7.3), and the test location is the excitation source The output terminal. 8.4.3 The test method of the output signal envelope and repetition period of the excitation source is the same as the test method of the transmitter output signal envelope (see 7.2). The test position is the ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of MHT4039-2013_English be delivered?Answer: Upon your order, we will start to translate MHT4039-2013_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of MHT4039-2013_English with my colleagues?Answer: Yes. The purchased PDF of MHT4039-2013_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay. |
