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Multi-channel VHF and VHF/UHF radio communication equipment

Application

Series 2000 represents a new-generation digital multichannel VHF and VHF/UHF radio communication equipment to be used in air traffic control systems for civil and state aviation. Digital technology enhances radio communication and data transmission in ACARS and VDL 2 modes.

Design and modifications

Featuring modular design, Series 2000 radio communication equipment represents a scalable solution suitable both for small airports and for huge multichannel radio centers. Configuration of radio transmitters and transceivers includes power unit, transmitter-receiver module, control and indication module and power amplifier. The radio receiver consists of a power unit, transmitter-receiver module, control and indication module. Such hardware configuration makes it possible to use Series 2000 radio communication equipment in combined transmitting-receiving centers by means of using transceivers or radio terminals. A required number of radio receiving and transmitting devices is used in separated receiving and transmitting centers. The Series 2000 radio communication equipment requires no maintenance or calibration and adjustment in case of module replacement.
The Series 2000 radio frequency channel design offers high performance and reliability. When considering radio receivers RX2000V, term ‘multi-channel’ gets conceptually new meaning as four- (eight-) channel receiver is capable to receive signals simultaneously over four (eight) independent frequency channels throughout entire frequency range and produce low frequency output over eight communication lines.
Series 2000 radio transmitters and transceivers provide the possibility to select capacity between 5 and 50 W. The modifications of VHF/UHF radio communication equipment supporting FHSS mode are used to control the state aviation flights. A specific program reads out, stores and copies the groups of settings and a preset configuration of a device. Any selector switches or jumpers are not required.
The software for Series 2000 radio communication equipment offers the possibility to add new functions, expand technical capabilities or adapt the hardware to the specific application without any design changes. The radio transmitters and transceivers are 19"/2 wide, while the radio receivers are 19"/4 wide. The height of all radio communication devices is 3U. So, up to 24 radio transmitters or transceivers can be installed into a standard 19” rack.

Control and monitoring

All radio communication equipment is interconnected through LAN interface and shares built-in test system for basic parameters monitoring. The detailed information about current device status is shown by the LED indicators and displayed on character-numerical display.
Radio communication equipment offers both local control using front panel buttons and remote control through RS-485, Ethernet, USB or low-frequency interface. For software-based operation and configuration settings loading, radio communication equipment offers USB port for PC connection. With such remote control and monitoring capabilities, radio communication equipment can be controlled from one or several control centers, thus offering new possibilities for radio networking.

Functional features of radio communication equipment

When used in areas with high noise environment induced by operating radio transmitter, radio receivers offer the possibility to select input signal gain, thus ensuring low intermodulation interference.
Noise suppressor supports two operating modes. It may operate based on level of radio frequency input signal or S/N ration of audio signal. If required, use may combine both noise reduction criteria.
The radio receiver offers possibility to listen own signal or connect external audio recording hardware.
The transceivers and radio transmitters also incorporate safety function for antenna-feeder line failure with automatic performance recovery after elimination of failure.
The radio communication equipment meets ICAO requirements regarding offset carrier frequency.
With integrated Pin-diode switch, transceiver is capable to operate with single transceiver antenna eliminating the need in external antenna relay.
If radio transmitter encounters high ambient temperature, low supply voltage or worse SWR (before idle mode and closing) in antenna-feeder line, transmitter output capacity reduces automatically and recovers to normal operation after elimination of abovementioned conditions. Transmitting-receiving module includes micro computer, receiver and exciter. The transmitting-receiving module provides the following functions: demodulation of received signals, data encoding and decoding, modulated signal output, control and monitoring of power unit, power amplifier and control & indication module as well as data acquisition and output over low-frequency interface, RS-485 interface, Ethernet or USB.
Radio communication equipment can operate from AC or DC power source, or simultaneously from both sources provided that AC mains is used as primary power source while DC mains as backup power source.

Performance capabilities

• Full compliance with ICAO and National standards;
• High interference protection for adverse electromagnetic environment;
• Self-adaptation to environmental conditions;
• 24/7 operation with maximum (up to 50 W) radio transmitter output capacity;
• Advanced integrated test capabilities;
• Easy user interface and fool-proof operation;
• Remote control and monitoring capabilities over low-frequency lines and digital channels;
• Effective monitoring and redundancy; high reliability;
• Unauthorized local access alarm;
• Electronic event log (registration) with support of local/remote access;
• Service software with user-friendly graphic interface;
• Compact and lightweight modular design that uses advanced and perspective components.

Transmitter main specifications
Frequency range:
— for frequency spacing of 25 kHz	118,000—136,975 MHz
— for frequency spacing of 8.33 kHz	118,0000—136,9916 MHz
Maximum relative frequency fluctuation	±0,2...10
Modulation types for data exchange modes:
— voice	АЗЕ
— ACARS	A2D
— VDL2	D8PSK
Modulation depth (selectable with step of 5%)	30—95 %
Transmitter capacity range, selectable with step of 1W (for ВАИШ.464117.002-02)	5—50 W
Minimum frequency band of telephone line at 6dB:
— for frequency spacing of 25 kHz	300—2700 kHz
— for frequency spacing of 8.33 kHz	300—2500 kHz
Transmitter non-linear distortion factor (%) for modulation frequency between 300 and 3400Hz and modulation depth between 30 and 95%	5 %
Maximum discontinuity of transmitter frequency response for frequency range of modulating signal between 300 and 3400Hz regarding 1000Hz	3 dB
Minimum depression of indirect transmitter radiation	80 dB
Acceptable VSWR at output capacity of 50W	2
Maximum depth of incidental amplitude modulation	1 %
Number of preset channels	30
Carrier frequency offset, modes «2», «3», «4», «5»	According to ICAO, vol. III, Appendix 10
Maximum ready-for-operation time after power-up:	3 seconds
Maximum power consumption for VAISh.464117.002-02
— for AC power supply	300 WA
— for DC power supply	250 W
Radio receiver main specifications
Frequency range:
— for frequency spacing of 25 kHz	118,000—136,975 MHz
— for frequency spacing of 8.33 kHz	118,0000—136,9916 MHz
Maximum relative frequency fluctuation	±0,2...10
Modulation types for data exchange modes:
— voice	АЗЕ
— ACARS	A2D
— VDL2	D8PSK
Minimum frequency band of telephone line at 6dB:
— for frequency spacing of 25 kHz	300—2700 kHz
— for frequency spacing of 8.33 kHz	300—2500 kHz
Receiver sensitivity at modulation frequency 1000 Hz, modulation depth 30% and minimum S/N ration 10 dB	1
Minimum depression of indirect receiving channels	80 dB
Minimum radio receiver selectivity for adjacent channel	80 dB
Minimum radio receiver selectivity for intermodulation receiving channels	80 dB
Minimum blocking dynamic range	86 dB
Maximum discontinuity of radio receiver frequency response within frequency range between 300 and 3400Hz regarding 1000Hz	3 dB
Number of preset channels	30

Series 2000 configuration
Type	VHF 110-150 MHz	VHF/UHF 100-400 MHz	Options
Transceiver	RS2500V	RS2500W	50 W, w/o antenna switch 50 W, with antenna switch 5 W, w/o antenna switch 5 W, with antenna switch
Transmitter	TX2500V	TX2500W	50 Вт 5 Вт
Receiver	RX2500V	RX2500W	4-channel 8-channel

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