Fixed Means


Direction Finding Unattended System


  • System is intended for search, detection, evaluation of parameters, direction finding, recording, technical analysis and classification of signals within HF, VHF, UHF and SHF ranges, as well as for localization of their emitters while operating as a part of automated spectrum monitoring systems.

Typical Configuration:

  • ARTIKUL-S Fixed Direction Finder (simultaneous bandwidth up to 5 MHz, operating frequency range 30 – 3000 MHz)
  • Mast
  • Controller with software for remote control
  • Thermostatic moister proof cabinet for installation of the equipment (external temperature range -20C+30C)
  • Operator's automated workstation (AWS) with SMO-PAI, SMO-STA, SMO-ASPD Software Packages
  • Communication and data transmission equipment
  • Backup power supply system with remote control (battery-run time of the radio monitoring equipment is 2 hours minimum)

Antenna system of ARTIKUL-SN and cabinet with equipment

Antenna system of ARTIKUL-SN and cabinet with equipment


  • Extension of DF frequency range extension (1.5 – 8000 MHz)
  • Simultaneous DF bandwidth extension up to 24 MHz
  • Extension of operating temperature range for outdoor operation: additional heat Insulation (down to -55C), conditioner (up to +55C)
  • Equipment of back-up communication channel (2G/3G/4G modem)
  • SMO-PVP Cross Talk Detection Software Package
  • ARC-GIS Geoinformation Server.

Structural Diagram of ARTIKUL-SN

Features of System:

  • It meets the requirements of Unified Technical Policy (ETP) of RF Federal Service for Supervision in the Sphere of Telecom, Information Technologies and Mass Communications concerning fixed radio monitoring systems
  • To prevent digital path overloading of the direction finder with simultaneous bandwidth of 24 MHz in complicated electromagnetic environment, digital radio receiver includes additional analogue path with 500 kHz bandwidth
  • A/D processing unit, power supply system, controller and communication equipment are placed inside thermostatted moisture protected cabinet that provide an ability of outdoor location
  • The distance between antenna system and location of controller unit can be up to 100 m
  • Joint operation of several systems, including being a part of ASMS (ARMADA, AREAL, etc.).

System Provides:

  • Panoramic spectrum analysis within the entire operating frequency range or within separate intervals in complicated electromagnetic environment, accommodation to ambient radio environment and detection of its changes
  • Search for emission sources within selected frequency ranges, including frequency hopping signals
  • Plotting frequency-time diagram of loading within analyzed frequency ranges.
  • Automatic direction finding of radio emission sources with random modulation types and spectrum width in single-channel and multi-channel modes
  • Building of bearing panorama within operating frequency range
  • Real-time display of bearings, spectrum panorama, bearing history and signal amplitude history
  • Evaluation of signal parameters
  • Field strength evaluation
  • Recording of radio emission spectrum
  • Automated radio monitoring based on preset schedule or under operator control
  • Remote control based on TCP/IP via wire and wireless communication channels
  • Automated control of equipment health
  • Review and processing of the data from DB
  • Mapping DB information on the electronic map
  • Generation of reports with radio monitoring results in Microsoft Office, OpenOffice, HTML and PDF file formats.

In case of joint operation, the systems provides in addition:

  • Interaction via wire and wireless channels
  • Assigning tasks from master system to slave ones
  • Transfer of radio monitoring data from slave systems to master one for further analysis and processing
  • Synchronous direction finding of radio signal sources
  • Transmitter location evaluation based on direction finding data (when ARC-GIS Geoinformational Server is included).

Basic Technical Specifications of Systems in Complete Configuration

Operating frequency range 1.5 – 8000 MHz
Panoramic spectrum analysis rate up to 20 GHz/s
Intermodulation free dynamic range (3rd and 2nd order) 75 dB, min
Maximum simultaneous DF bandwidth 24 MHz
DF method Correlative interferometer
Operating azimuth range 0° - 360°
General Parameters
Power consumption 1000 W, max.
Dimensions of uninterruptible power supply unit (W x D x H) 600 x 600 x 1500 mm, max.
Weight of uninterruptible power supply unit max. 80 kg
Dimensions of antenna system (diameter x height) 2110 x 2820 mm
Weight of antenna system max. 40 kg
Operating temperature range -55C +55C

Technical parameters of DF paths depends on parameters of ARTIKUL-S Direction Finder.

Typical curves of RMS and DF sensitivity vs. frequency are the same as curves given for ARTIKUL-S Fixed Direction Finder

Fixed Means