The Automated Transmitting and Receiving Center (ATRC) TRS 2000 is designed to provide fixed radio communication channels between dispatchers and aircraft crew to the benefit of the Unified System of Air Traffic Management of the Russian Federation (USATM RF). Suitable for installation both to stationary radio facilities or containers, the ATRC is available in different hardware configurations:
The combined transmitting/receiving radio centers represent a conceptually new design approach to radio communication solutions for air traffic management. Such approach offers the possibility to accommodate transceivers and receivers in single facility or cabinet, install antennas within a limited space and guarantee adequate electromagnetic compatibility. Also, this solution enables to reduce cabling (cables needed for single location only), land lease costs, operational expenses and necessary auxiliary equipment.
ATRC consists of the following parts:
The hardware locates in standard 19" racks according to IEC 60297.
From external system side, any ATRC channel can be switched to transmission mode in a following way:
Control signal type depends on application requirements.
Dedicated remote control hardware (RCH), that shall be located in Air Traffic Management Facility, provides remote control and monitoring capabilities for ATRC. This hardware provides collection, processing and display of data associated with technical condition of maximum 40 ATRCs as well as manages their hardware configuration. Also, ATRC's radio communication hardware offers certain additional capabilities to meet demands of different applications.
To ensure solid communication field under steep terrain (eg mountainous areas) can be installed standalone radio repeaters . If the frequencies of radio repeaters will be slightly shifted relative to the frequencies of the main radio , the dispatcher pressing PTT on one channel mode radiation will go over remote transmitters offset carrier and the aircraft all incoming signals will be accepted without distortion. There is the possibility of a carrier frequency offset transmission and reception (with grid spacing 25 kHz ) according to ICAO, Volume III, Annex 10 .
To meet continuous transmission requirements, e.g., «Meteo» channel, ATRC incorporates radio communication equipment that ensures 24-hours channel operation in «Transmission» mode.
Aviation regulations require the installation of air traffic management systems in the emergency radio , power supply which is provided by chemical current sources . The most cost effective simultaneous connection of radio communication equipment AC and DC . When AC AC radio automatically switches to chemical sources without loss of communication and reduce transmitter power .
Any single transceiver may use simplex, semi duplex and duplex mode provided that receiver and transmitter incorporates individual synthesizers. In this case receiver and transmitter, each connected to own antenna, enables to use duplex mode and repeater mode.
When implementing ATRC with lots of frequencies may intemodulation radiations of different orders . To improve the electromagnetic compatibility , reducing intermodulation , out of band and spurious products are used in filtration decoupling devices providing radiation suppression of third-order intermodulation to minus 65 dB, and the out-of-band emission to the level of minus 44 dB.