Vhf-uhf Mobile Radiomonitoring Station «barvinok-m»

VHF-UHF mobile radiomonitoring station «Barvinok-M» is intended to provide detection and direction finding of signals within the frequency band of 25 - 3000 MHz. Station provides scanning of pre­set VHF-UHF frequency band, spatial search and localization of RES position by surface wave of vertical polarization.
Equipment of «Barvinok-M» station is mounted inside Customer's vehicle (minibus). VHF-UHF direction finding antenna feeder system is mounted on top of the vehicle under radiotransparent streamlined antenna cover.
Station is serviced by a single operator. «Barvinok M» software is developed using modern computer technologies and due to GUI station operation doesn't involve high qualification and special knowledge of operator. Built-in self-testing system allows defining of malfunction up to bench-replacement assembly.
«Barvinok-M» detector-finder refers to the class of the systems with spatial signal processing and it provides signal detection by signal spatial features together with assessment of direction towards RES using correlation vector method of bearing computation.
VHF-UHF antenna system consists of two ring antenna arrays each containing 7 monopoles covering frequency sub bands of 25-1000 MHz and 1-3 GHz respectively.
Navigation equipment (GPS-receiver) with radio communication equipment provides a possibility of synchronous work of mobile stations «Barvinok M» both as Salve and Master station.
Power supply of the station is provided through UPS from industrial network with given voltage 220 V, frequency 50 Hz from independent source that is mounted in the rear section of the vehicle.
Station provides:
•  Panoramic look with signal detection and direction finding in the frequency band of 25 - 3000 MHz with 10 GHz/s rate
•  Automatic detection and direction finding of emission sources of modern communication systems (Conventional & Frequency Hopping) using correlation vector method
•  Coordinates' computation with displaying them on the digital map
•  Network classification and signal parameters measurement
•  Signal reception and digital registration
•  Audio and visual control over signals detected
•  Radio electronic environment (REE) data storing and processing
•  Informational interaction inside direction finding network with time synchronization by GPS navigation system
• Range of coverage: up to 20.. .30 km in the 25 - 500 MHz frequency band up to 5...10 km in the 500 - 3000 MHz frequency band
Purpose
Mobile VHF-UHF station for radiomonitoring «Barvinok-M» provides the following:
•  REE monitoring over the territory in view of 20-30 km in the band of 25-500 MHz and up to 5-10 km in the band of 500-3000 MHz;
•  Search, detection and direction finding of new radio emission sources within given segment of VHF-UHF (25-3000 MHz) frequency bands;
•  Network classification and measurement of signals parameters of the RES detected;
•  Control over already known sources put under observation;
•  Disclosure of radiation modes and composition of radio nets operating on conventional and hopping frequencies with selection of separate sources by frequency-bearing panorama;
•  Signal registration at the audio and IF outputs of the tracking receiver;
•  Coordinates computation of the source location with displaying them on the map;
•  Parameters and operation modes control, data gathering from Slave stations of the direction finding network;
•  Automated processing and documentation of REE data;
•  Informational interaction with stations from the composition of the complex.

Technical parameters VHF-UHF detector-radio direction finder:
• Operating frequency band25-3000 MHz
• Frequency scanning rate with detected signals processing:
• Frequency resolution, kHz6.25       12.5        25
• Instrumental frequency scanning rate, GHZ/s2           5             10

Instrumental bearing error:
• within 25-100 MHz frequency band3.0° (RMS)
• within 100-1000 MHz frequency band1.0° (RMS)
• within 1000-3000 MHz frequency band2.0° (RMS)
• Sensitivity by EM-field (SNR=10 dB, BW=12.5 kHz):
• in the 25 50 MHz frequency band15 - 40 µV/m
• in the 50 1000 MHz frequency band3 - 15 µV/m
• in the 1- 3 GHz frequency band10 - 30 µV/m
• Realtime BW2.5 / 10 MHz
• Probability of detection and direction 
finding of the signal with 100 ms duration 
when scanning in the 200 MHz frequency band
> 0.9
• Probability of detection and direction finding of FH signals> 0.9
• Minimal duration of the signal to be detected and for its bearing to be taken1 ms
• Sensitivity of receiving sections (SNR=10 dB, BW=12.5 kHz)0.7-1.0 µV
• Dynamic range with respect to third order intermodulation:> 80 dB
• Dynamic range of received signal levels120 dB
• Suppression of spurious channels> 80 dB
• Relative frequency instability2x10-7
• Tuning time of receiver's frequency synthesizer200 µs
• Spectral density of heterodyne noise (given detuning 25 kHz)- 100 dBc/Hz
• Quality assessment of signal detection and direction findingRMS ©/U dBµV

VHF-UHF equipment of tracking and signal registration:
•Number of receiving channels:1 tracking and 
registration 
channel
•Operating frequency band25-3000 MHz
•Sensitivity (SNR=10 dB, BW=12 kHz)0.7 - 1 µV
•Dynamic range of received signal levels> 120 dB
•Tuning time of receiver’s frequency synthesizer1 ms
•Frequency tuning step10 Hz
•Frequency analysis and digital
registration band
2,5 kHz - 3 MHz
•Time of signal registration (is set
automatically depending on the
frequency band and detector-finder
request queue
10…100 s
•Total duration of continuous signal
record of a signal given frequency
band 300 kHz to HDD
4 hours
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