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MHT4001.1-2016: (VHF ground-to-air communication ground system. Part 1: Technical specification for voice communication system)
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Standard IDUSDBUY PDFLead-DaysStandard Title (Description)Status
MH/T 4001.1-2016699 Add to Cart 5 days (VHF ground-to-air communication ground system. Part 1: Technical specification for voice communication system) Valid

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Basic data

Standard ID: MH/T 4001.1-2016 (MH/T4001.1-2016)
Description (Translated English): (VHF ground-to-air communication ground system. Part 1: Technical specification for voice communication system)
Sector / Industry: Civil Aviation Industry Standard (Recommended)
Classification of Chinese Standard: M36
Word Count Estimation: 28,243
Date of Issue: 9/5/2016
Date of Implementation: 1/8/2016
Issuing agency(ies): Civil Aviation Administration of China

MHT4001.1-2016: (VHF ground-to-air communication ground system. Part 1: Technical specification for voice communication system)


---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.
(VHF ground-to-air communication ground system.Part 1.Technical specification for voice communication system) ICS 33.060.01 M 36 Civil Aviation Industry Standard of the People's Republic of China Replace MH/T 4001.1-2006 VHF ground-to-air communication ground system Part 1.Technical Specification of Voice Communication System 2016-05-09 released 2016-08-01 Implementation Issued by Civil Aviation Administration of China

Table of contents

Foreword...II 1 Scope...1 2 Normative references...1 3 Terms, definitions and abbreviations...1 4 Classification and composition...1 5 Overall performance requirements...3 6 Technical Specifications...5 7 Working environment...11 8 Test method...11 Appendix A (Normative Appendix) Test methods for main technical indicators of VHF receivers and transmitters...12

Foreword

The MH/T 4001 "VHF Ground-to-Air Communication Ground System" plan is divided into the following parts. --Part 1.Technical specification of voice communication system; --Part 2.Technical specifications of data communication systems. This part is part 1 of MH/T 4001. This part replaces and abolishes MH/T 4001.1-2006 "VHF Ground-to-Air Communication Ground System Part 1.Technical Specifications for Voice Communication Systems", Compared with MH/T 4001.1-2006, the main technical changes are as follows. - Deleted the overview (Chapter 4 of the.2006 edition); - The title of Chapter 5 of the.2006 edition was revised to "Classification and Composition", and the classification of fixed stations, mobile stations, and portable stations was added (see 4.1.2); - Deleted the third category of multi-channel VHF transceiver system (2006 version 6.1.2.1); - Added the extended function of VHF monitoring system (see 5.3.2); -Deleted the performance requirements of the selective pager, delayer, and selector (2006 version 6.3.2 ~ 6.3.4); - Modify the technical indicators of the VHF transceiver system to the technical indicators of the VHF transceiver system (see 6.1,.2006 version 7.1.1); -Modified frequency accuracy (see 6.1.3.1,.2006 edition 7.1.1.2); - Modify the channel spacing to frequency spacing and delete the 12.5 kHz channel (see 6.1.1.3,.2006 edition 7.1.1.3); - Delete the system channel isolation (2006 version 7.1.1.8); --Modify the sending and receiving conversion time of 20 ms to PTT response time of 50 ms and sending and receiving conversion time of 60 ms (see 6.1.3.8,.2006 edition 7.1.1.9); --- Increase the power supply requirements of portable station equipment (see 6.1.1.5) -Modified the receiver sensitivity value (see 6.1.2.1,.2006 version 7.1.2.1); -Deleted the RF input impedance (2006 version 7.1.2.2) --Modify the hum and noise level not greater than -45 dBm to the audio noise signal-to-noise ratio not less than 40 dB (see 6.1.2.15,.2006 edition 7.1.2.4); --Modify the intermediate frequency suppression not less than 90 dB to not less than 80 dB (see 6.1.2.6,.2006 edition 7.1.2.5); --Modify the automatic gain control to the receiver's RF dynamic range (see 6.1.2.4,.2006 version 7.1.2.6); -Modified the receiver bandwidth value (see 6.1.2.3,.2006 version 7.1.2.8); - Modified the audio output value and deleted the technical requirements for speakers and headphones (see 6.1.2.12,.2006 edition 7.1.2.9); -Modified the requirements of intermodulation suppression (see 6.1.2.8,.2006 edition 7.1.2.10); --Modify the signal-to-noise ratio or audio output drop to drop or block, and modify the index value (see 6.1.2.7,.2006 version 7.1.2.11); --Added intermodulation suppression, adjacent channel suppression, spurious response suppression, audio output, audio response, audio AGC range (see 6.1.2.9～6.1.2.13), the squelch lag, carrier frequency offset squelch capability, and squelch response time have been added to the squelch (see 6.1.2.16); --Added the technical indicators of portable station equipment reception (see 6.1.2); --Modify the carrier power value and increase the step (see 6.1.3.2,.2006 edition 7.1.3.1); -Modified the maximum modulation value (see 6.1.3.4,.2006 edition 7.1.3.3); - Deleted the parasitic frequency offset (2006 version 7.1.3.5); - Modified audio gain adjustment to audio gain control (see 6.1.3.5,.2006 version 7.1.3.6); -Modify the audio line impedance to audio response (see 6.1.3.7,.2006 edition 7.1.3.7); -Deleted the hum and noise level (2006 version 7.1.3.8); --Modified the PTT response time and increased the sending and receiving conversion time (see 6.1.3.8,.2006 version 7.1.3.9); --Modify harmonic suppression and clutter suppression to spurious radiation product suppression (see 6.1.3.11,.2006 editions 7.1.3.10, 7.1.3.11); --Modified the power consumption requirements (see 6.1.3.12,.2006 version 7.1.3.12); - Increased total distortion (see 6.1.3.6), adjacent channel power suppression (see 6.1.3.9), transmission intermodulation suppression (see 6.1.3.10); --- Increase the transmission technical indicators of portable station equipment (see 6.1.3); - Deleted the multi-element shared antenna (version 7.2.2 in.2006); --Modified the antenna frequency range (see 6.2.1,.2006 edition 7.2.1.1); --Modify the antenna gain to omnidirectional antenna gain (see 6.2.2,.2006 edition 7.2.1.2); -Modified the antenna standing wave ratio (see 6.2.3,.2006 edition 7.2.1.3); - Deleted the transmitting oscillator load power (2006 version 7.2.1.6); - Delete the filter 3 dB bandwidth (version 7.3.2 in.2006); - Deleted couplers, switches, and splitters (version 7.4 in.2006); --Added VHF shared system transmitting filter bank and radio frequency wiring (see 6.4); --- Added VHF shared system transmitting filter bank and RF wiring (see 6.5); - Deleted the circuit bit error rate (version 7.5.2.1 in.2006); -Modify the circuit delay (2006 version 7.5.2.2) and delay jitter (2006 version 7.5.2.3) to packet or code stream back-to-back delay ( See 6.6.2.3) and delay jitter (see 6.6.2.2). -Deleted the signal selector, delayer, and selective caller (2006 version 7.6.4~7.6.6); - Modified the criteria for impact and vibration (see 7.1.1, 7.1.2,.2006 edition 8.1.1, 8.1.2); --Modify the working environment temperature to normal working temperature and extreme working temperature (see 7.1.3, 7.1.4,.2006 edition 8.1.3); --- Increase the test method and corresponding test environment requirements (see Appendix A). This part was proposed by the Air Traffic Control Industry Management Office of the Civil Aviation Administration of China. This part was approved by the Aircraft Airworthiness Certification Department of the Civil Aviation Administration of China. This part is under the jurisdiction of the China Academy of Civil Aviation Science and Technology. Drafting organization of this section. Air Traffic Control Technology and Equipment Development Co., Ltd., Air Traffic Management Bureau, Civil Aviation Administration of China. The main drafters of this section. Guo Jing, Deng Zhen, Ren Sen, Wang Yonglei, Jia Fei, Zhou Gang, Li Li, Li Zhe. The previous published versions of this part are. ――MH/T 4001.1-1995; ――MH/T 4001.1-2006. VHF ground-to-air communication ground system Part 1.Technical Specification of Voice Communication System

1 Scope

This part of MH/T 4001 specifies the classification and composition of the ground voice communication system for civil aviation VHF ground-to-air communication, overall performance requirements, Technical indicators, test methods and working environment requirements. This part is applicable to the design, manufacture and inspection of civil aviation VHF ground-to-air ground voice communication systems and related equipment.

2 Normative references

The 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. GJB 150.16A-2009 Military Equipment Laboratory Environmental Test Method Part 16.Vibration Test GJB 150.18A-2009 Military Equipment Laboratory Environmental Test Method Part 18.Impact Test ICAO "Convention on International Civil Aviation" Annex 10 "Aeronautical Telecommunications" 3 Terms, definitions and abbreviations 3.1 Terms and definitions The terms and definitions defined in Annex 10 "Aeronautical Telecommunications" of ICAO "Convention on International Civil Aviation" apply to this document. 3.2 Abbreviations The following abbreviations apply to this document. ADPCM Adaptive Difference Pulse Code Modulation (Adaptive Difference Pulse Code Modulation) BITE built-in test equipment (Built-In Test Equipment) Modulation degree (Modulation) MTBCF Mean Time Between Critical Failures (Mean Time Between Critical Failures) MTBF Mean Time Between Failures (Mean Time Between Failures) PTT button to talk (Push to Talk) RF (Radiation Frequency) SINAD (SIAND=(Signal Noise Distortion)/(Noise Distortion)) SQL Squelch (Squelch) VSWR Voltage Standing Wave Ratio (Voltage Standing Wave Ratio)

4 Classification and composition

4.1 Single VHF Transceiver Classification 4.1.1 Divided into the following three categories according to the type of transceiver composition. a) The transceiver equipment is integrated, the transceiver is the same RF interface, and the transceiver uses 1 antenna element; b) The transceiver equipment is integrated, the transceiver uses different RF interfaces, and the transceiver uses different antenna elements; c) The transceiver equipment is separated, the transceiver uses different RF interfaces, and the transceiver uses different antenna elements. 4.1.2 Divided into the following three categories according to the way the transceiver is used. a) Fixed platform; b) mobile station; c) Portable station. Note. There are differences in the performance indicators of transceivers for different usage methods. 4.2 Classification of VHF Sharing System 4.2.1 Divided into the following two categories according to the type of transceiver composition. a) The receiver and transmitter are separated, and the antenna elements of the receiving and transmitting antennas are separated (horizontal or vertical isolation). Usually, each of the four receiving and transmitting channels share one antenna element; b) The transceiver is integrated (receiving and receiving RF interfaces are separated), and the receiving and transmitting antenna elements are separated (horizontal or vertical isolation), usually every 4 receiving and The transmitting channels each share 1 antenna element. 4.2.2 Divided into the following two categories according to usage. a) Mobile station; b) Fixed table. 4.3 Composition of VHF Sharing System 4.3.1 The transceiver equipment is integrated, and the transceiver antenna is separated. The system configuration includes. a) Transceiver. 2 units per channel, configured as master/backup mode; b) Receiving antenna. multiple channels (usually 4 channels) correspond to one antenna element; c) Transmitting antenna. multiple channels (usually 4 channels) correspond to one antenna element; d) Receiving filter bank. usually includes 1 multi-channel (usually 4 channels) star type RF splitter, multiple (usually 4) filters and RF wiring; e) Transmit filter bank. usually includes 1 multi-channel (usually 4 channels) star-shaped RF combiner, multiple (usually 4) filters, Isolator, dummy load and RF wiring; f) RF splitter. 1 per receiving channel; g) Radio frequency switcher. 1 per transmission channel; h) Cabinet or rack. including supporting radio frequency wiring, audio wiring, AC and DC power distribution unit; i) Monitoring interface unit. Provides system monitoring data interface. 4.3.2 The transceiver equipment is separated, and the transceiver antenna is separated. The system configuration includes. a) Transmitter. 2 units per channel, configured as master/backup mode; b) Receiver. 2 units per channel, configured as master/backup mode; c) Receiving antenna. multiple channels (usually 4 channels) correspond to one antenna element; d) Transmitting antenna. multiple channels (usually 4 channels) correspond to one antenna element; e) Receiving filter bank. usually includes a multi-channel (usually 4) star-shaped RF splitter, multiple (usually 4) filters and RF wiring; f) Transmitting filter bank. usually includes 1 multi-channel (usually 4) star-shaped RF combiner, multiple (usually 4) filters, Isolator, dummy load and RF wiring; g) Radio frequency splitter. 1 for each receiving channel; h) Radio frequency switcher. 1 per transmission channel; i) Cabinet or rack. including unified radio frequency wiring, audio wiring, AC and DC power distribution unit; j) Monitoring interface unit. Provide system monitoring data interface.

5 Overall performance requirements

5.1 Single VHF transceiver 5.1.1 The panel of the VHF equipment should at least have visual indications such as operating frequency or channel, power supply status, transmission carrier loading, SQL opening or threshold, and alarms. 5.1.2 The emission protection shall meet the following requirements. a) VHF equipment will not transmit when the frequency is out of lock; b) VHF equipment does not emit when the transmitter RF is open or shorted; c) The mobile station and fixed station equipment will automatically reduce the transmission power or close the transmission when the power amplifier temperature alarms; d) The mobile station and fixed station equipment should not be damaged when the VSWR is too high. After the VSWR exceeds the threshold (6.0), the transmission power should be reduced or the transmission should be turned off; e) The mobile station and fixed station equipment have PTT long-transmission limitation and the time is adjustable, and this function should be able to be turned off. 5.1.3 Various parameters set in the transceiver (including at least the current channel or frequency, frequency offset, power level, long transmission time limit, working Mode, squelch threshold, etc.), it should be able to maintain at least 30 d when the equipment is not powered on. 5.1.4 The power supply mode should meet the following requirements. a) The mobile station and the fixed station equipment have two power supply modes. AC and DC, AC is the main use, and DC is the backup, which can automatically switch; b) The portable device has AC power supply and battery power supply. 5.1.5 The external interface shall meet the following requirements. a) The receiver has a built-in speaker and volume adjustment knob, and the transmitter has a microphone input interface; b) The mobile station and fixed station equipment have remote control interfaces, and the physical and electrical characteristics of the interfaces are at least compatible with E c) The mobile station and the fixed station equipment have a recording interface, and the recording interface of the transceiver integrated machine is mixed to send and receive audio on a pair of audio lines; d) The mobile station and fixed station equipment have a data communication interface that meets computer debugging and monitoring; e) The antenna interface is 50 Ω unbalanced. 5.1.6 Self-check and built-in test shall meet the following requirements. a) VHF equipment has a power-on self-check function, and displays the test results on the panel, and the mobile station and fixed station equipment can also output the test results to the monitoring system; b) The mobile station and fixed station equipment can detect parameters such as VSWR, modulation degree, carrier power, and received signal strength; c) The mobile station and fixed station equipment can alarm for frequency loss, VSWR over limit, and power amplifier temperature over limit; d) The mobile station and fixed station equipment can detect the main module failure and alarm. 5.2 VHF Sharing System 5.2.1 The switching of the main and standby transceivers shall meet the following requirements. a) Each channel is composed of main and standby equipment, and the working status of the current equipment is displayed on the panel; b) When the main machine fails, it will alarm and automatically switch to the standby machine. 5.2.2 The external interface shall meet the following requirements. a) The system has a centralized data monitoring interface, which can monitor multiple channels of transceiver equipment through a single physical interface; b) Each cabinet has a unified AC and DC power distribution interface; c) Each channel of the system has at least two remote control voice interfaces, which include at least PTT, SQL, sending and receiving audio, Interface signaling is compatible with at least E 5.2.3 System protection should meet the following requirements. a) All transceivers, filters, isolators, and dummy loads in the VHF shared system are all independent Does not affect the normal operation of other channels in the system; b) When the antenna or feeder fails, the radio frequency power of the corresponding channel of the system is output to the dummy load. 5.3 VHF monitoring system 5.3.1 Basic functions include. a) The monitoring terminal should be able to view and set the working status and performance parameters of the transceiver, including at least. working frequency, frequency deviation, power, Modulation degree, squelch threshold, squelch switch, transceiver master and slave switch; b) The monitoring terminal should be able to monitor the working status and performance parameters of the transceiver, including at least. working status, standing wave ratio, modulation degree, Transmitting power, received signal strength, AC and DC power status; c) The monitoring terminal should be able to start the self-check of the transceiver and reflect the result of the self-check, and classify and determine the fault of the VHF equipment Bit, and generate audio and image alarms; d) The monitoring system should be able to detect the fault status of the transceiver in real time, regardless of factors such as transmission delay, and the response speed on the terminal should be less than 5 s; e) The monitoring system should have a work log function to record changes in the operating status of the transceiver, alarm information and monitoring system operation information, etc. And can query and export the work log; f) The failure of the monitoring terminal should not affect the normal operation of the VHF transceiver. 5.3.2 Extended functions include. a) The monitoring terminal should be able to set hierarchical security passwords and user permissions; b) The monitoring terminal should have networking functions, remote terminal access and monitoring information output capabilities; c) The monitoring terminal should have the ability to monitor multiple VHF stations. 5.4 Signal transmission system 5.4.1 The signal transmission system includes transmission and access equipment, which is directly related to control and audio signals, and is directly used for signal transmission. 5.4.2 Transmission physical media includes. optical fiber, microwave, signal cable, etc. Twisted-pair cables should be used for the cables that transmit audio and PTT and SQL signals (Above category 3), the loop resistance should not be greater than 100 Ω. 5.4.3 Access equipment can choose PCM group access equipment or multi-service router or multiplexer. If voice compression technology is adopted, it should be used ADPCM or G.72......
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