IDM Radar Data Optical Transmission Solution
1 Overview
Synchronous serial transmission is increasingly used in air traffic control radar applications. Traditionally, PCM equipment is used to transmit 9600bps asynchronous serial data. Our company has long focused on military and civil aviation applications and has proposed a radar data optical transmission solution, providing multiple dedicated radar data interfaces for radar data transmission. This solution supports both synchronous and asynchronous serial transmission, with a maximum of 128kbps in synchronous mode and 38.4kbps in asynchronous mode.
2 System Design
This solution adopts the SDH optical transmission scheme, supporting point-to-point or point-to-multipoint networking. A typical point-to-multipoint networking topology is shown below.
Requirement Description:
(1). There are 2 remote radar data access sites, requiring 12 and 4 radar data channels respectively;
(2). The central site needs to provide 40 radar data interfaces, of which 16 correspond to the local termination of the two remote sites accessing the radar data servers, and the remaining 24 are reserved for future remote site access.
Solution Description:
(1) The remote radar optical transmission equipment adopts our MUX180 device, with a single unit supporting up to 68 radar data interfaces;
(2) The radar-side optical transmission equipment MUX180 uplinks to the central site via a 155M optical interface;
(3) The radar monitoring center aggregates the remote radar data interface services through the MUX180 device, terminating them into the radar monitoring servers;
(4) For scenarios with a small number of radars, point-to-point fiber interconnection can also be used for transmission. A typical application diagram is shown below.
3 System Configuration
No. | Device Model | Configuration | Parameters | Qty | Unit | Remarks |
1 | IDM MUX180 | Main Unit | 19-inch3U chassis with17 service slots.-48V dual power supply,4x155M optical interfaces. | 1 | Unit |
Provides 4 optical ports, configured with 40 radar data serial interfaces, connecting 2 remote units. | |||
Radar Data Card | Each card provides 4 radar data interfaces. | 10 | cards |
2 | IDM MUX180 | Main unit | 19-inch3U chassis with17 service slots.-48V dual power supply,2x155M optical interfaces. | 1 | unit |
Configured to access12channels of radar data. | |||
Radar Data Card | Each card provides4radar data interfaces. | 3 | cards |
3 | IDM MUX180 | Main chassis | 19-inch 3U chassis with 17 service slots. Dual -48V power supplies, 2 155M optical interfaces. | 1 | Unit |
Configured to access4channels of radar data. | |||
Radar Data Card | Each card provides4radar data interfaces. | 1 | Unit |
4 Equipment Introduction
4.1 IDM MUX180 Integrated Optical-Electrical SDH Transmission Equipment (Access Type)
4.1.1 Overview
The IDM MUX180 integrated optical-electrical transmission equipment is a new-generation device launched by our company, based on MSTP and PCM technologies. It integrates MSTP transmission and PCM multi-service access functions into one unit, meeting the diverse fiber-optic transmission and access requirements of users for both broadband and narrowband services. With SDH ring network protection, it provides more reliable communication protection. The IDM MUX180 integrated unit can directly connect remote terminals such as telephones, computers, and cameras. At the remote end, it can also be extended via optical ports to connect PDH optical terminal units, optical modems, and multi-service optical terminal units, adapting to various network topologies.
Figure 1 Front Panel Diagram of the IDM MUX180 Equipment
4.1.2 Product Features
Ø The chassis adopts a 19-inch standard 3U rack-mount design with a plug-in card structure, providing 17 slots for 3U user cards;
Ø Two SFP-type STM-1 optical interfaces, supporting SDH ring and chain topologies, with tributary 1+1 channel protection;
Ø Provides 252×252 VC-12 level non-blocking cross-connection between TDM interface services, supporting unidirectional, bidirectional, and broadcast services;
Ø Supports access of up to 180 channels of 64K time-slot services;
Ø Provides 4 groups of physically isolated EoS Ethernet channels, each with a bandwidth of N×VC12 (N=1~50) configurable; each group also provides 1 reserved extended Ethernet port; works with the 8FE card to expand the number of extended Ethernet interfaces;
Ø Provides a 5-in-1 2-wire audio card: 3U-8MVOICE; each card provides 8 channels of 2-wire audio; each 2-wire audio channel can be configured as FXO/FXS/hotline/magneto/2100Hz magneto mode;
Ø Supports plug-in radar data access card, providing 4 radar data service interfaces per card, supporting synchronous and asynchronous operating modes. In synchronous mode, transmission rates support 300bps/600bps/1.2kbps/2.4kbps/4.8kbps/9.6kbps/19.2kbps/38.4kbps/57.6kbps/64kbps/115.2kbps/128kbps; in asynchronous mode, the maximum transmission rate is 38.4kbps, with automatic rate adaptation below 38.4kbps;
Ø Clock source can be selected from line clock, external clock (2Mbit/s or 2MHz), and free-running oscillation;
Ø Provides 17 user slots for inserting various service cards, supporting access to voice and data services including PDH, E1, FXO/FXS, V.24/V.28/V.35, EM2/4, hotline telephone, magneto telephone, high-fidelity audio, X.50, and 10M/100M Ethernet;
Ø Supports plug-in 3UMPCONV user optical port expansion card and WG300 signaling switching card;
Ø Standard model supports non-repeater transmission distance of 40 km; custom configurations are available for distances exceeding this;
Ø Provides Ethernet management channels based on DCC, E1, N*64K, and TCP/IP, with SNMP simple network management protocol support;
Ø DC -48V and AC 220V power supply, with optional DC+DC, AC+AC, AC+DC dual redundant power supplies;
4.1.3 Technical Specifications
Optical Interface
接口类型 | SFP | 光纤模式 | 单模(可选多模) |
Tx/Rx Rate | 155.52Mbps/155.52Mbps | Tx/Rx Wavelength | 1310nm/1550nm |
Optical Output Power | -12~-6dBm | Receiver Sensitivity | Better than-32dBm |
Transmission Distance | |||
E1 Interface
Bit Rate | 2.048Mbps | Line Code | HDB3 |
Standard Protocol | SupportsITU-T G.703 | Impedance | 75Ω/120Ω |
Frame Structure | PCM30/32 | Signaling | Channel-Associated Signaling |
Ethernet
Interface Type | RJ-45 | Transmission Rate | N×VC12(N≤50) |
Standard Protocol | SupportsIEEE802.3 | Operating Mode | Full/Half Duplex/Auto-Negotiation |
FXO, FXS Interfaces
Audio Range | 300Hz~3400Hz | Compression Rate | A-law per ITU G.711 |
Impedance | Triple compound impedance200Ω+560Ω//0.1μF | Loop current | 20mA/channel |
Co-directional 64K interface
Line Code | G.703 Standard | Line Rate | 64Kbps
|
Impedance | Balanced120Ω | Fully compliant withITU G.703recommendations | |
EM2/4****Wire Interface
Audio Frequency Range | 300Hz~3400Hz | Impedance | Balanced600Ω |
Compression Rate | A-law per ITU G.711 | Return Loss | Not less than 18dB |
Magnetic Ring Interface
Audio Range | 300Hz~3400Hz | Impedance | Balanced600Ω |
Compression Rate | A-law in ITU G.711 | Return Loss | Not less than 18dB |
Radar Data Interface
Operating Mode | Asynchronous Mode/Synchronous Mode |
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Transmission Rate | Synchronous mode: supports a maximum transmission rate of38.4kbps, with automatic adaptation for rates below38.4kbps. | ||
| Asynchronous mode: supports300bps/600bps/1.2kbps/2.4kbps/4.8kbps/ 9.6kbps/19.2kbps/38.4kbps/57.6kbps/64kbps/115.2kbps/128kbps. | ||
Electrical characteristics | Compliant withCCITT V.28protocol | ||
V.35 Interface
Interface Type | RJ-45 | Electrical Characteristics | Compliant withITU-T V.35Recommendation |
Transmission Rate | n×64Kbps (n=0–31) | Terminal Interface | Compliant with ISO2593 specifications |
Power Supply and Consumption
Power Supply | AC220V/DC-48V | Total Power Consumption | ≤90W |
Environmental Conditions
Operating Temperature | -20oC ~+50oC | Relative Humidity | 0~95%(non-condensing) |
Product Dimensions
Length×Depth×Height | 482×309×132(mm) |
4.1.4 Application Example 1
Figure 2 Star Network Application Diagram
The IDM MUX180 can form a star network with other SDH equipment to provide users with telephone, data, IP, and video services.