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Home Products VRF-12-141/A(V/UHF) V/UHF Direction Finder

VRF-12-141/A(V/UHF) V/UHF Direction Finder

Product Code:

288

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Additional information

GENERAL DESCRIPTION This system with extremely high scan speed is designed by making use of the latest technology in the field of military communications. This system can intercept and find the direction of frequency/time hopping, burst, and fixed frequency signals in the wide frequency range from 30MHz to 3000MHz. The antennas are designed for stationary and semi-mobile applications. Using large aperture antennas with nine elements, the system can reach highly accurate bearings. For better accuracy, the DF consists of three antenna sets, which are arranged for three sub-band frequencies. One set of nine elements antenna covers 30-200MHz frequency band, a set of nine elements antenna covers 30-1300MHz, and another set of eight elements antenna covers 1300-3000MHz frequency band. The overall system is protected against lightning to prevent natural malfunctions.

FEATURES

  • High-speed direction finding using correlative interferometer algorithm
  • Simultaneous direction finding of wide-band (FH/Burst) and narrow-band signals
  • Excellent resistance against powerful signals
  • Appropriate diversity of antennas to cover the frequency band
  • Enhanced DF accuracy and sensitivity by using wide aperture DF antennas
  • Extremely high frequency resolution
  • Direction finding of all narrow-band digital and analog modulated signals
  • Simultaneous direction finding of three frequency-hopping signals with 2500hops/S in 20MHz bandwidth
  • Networking capability for position finding
  • Direction finding of the burst signals with a time duration more than 400µsec
  • Equipped with GPS receiver for time synchronization
  • Automatically correct the error difference angle with respect to magnetic north by compass
  • Demodulation of the AM and FM signals
  • Self-test ability with error and fault status determination
  • User-Friendly GUI
  • Appropriate weight and dimensions
  • Tactical and stationary application
  • Scale indicating
  • Able to arrange any DF system on the map
  • Possibility to add or delete layers on the map
  • Capability to show a map in vector or raster shape in an infinite multi-layer
  • Printing ability

Specification

 

RangeDescription
30-3000 MHz (Expandable to 6 GHz)Frequency
20 MHz (Expandable to 80 MHz)Instantaneous Bandwidth
100 HzFrequency Resolution
0.1 ppmFrequency Accuracy
-105 dBc/Hz @10 KHzPhase Noise
≥ 80 dBImage Frequency Rejection
≤ 16 dBNoise Figure
80 dBAdjacent Channel Suppression 10 KHz
AM, FMModes of Demodulation
≥ 120dB Offline (Including AGC)
≥ 70dB Online
Dynamic Range
Correlative Interferometer, Music (option)DF Method
1° RMSInstrument DF Accuracy
Dependent to Antenna Type (Refer to Antenna Spec.)System DF accuracy
Azimuth vs. Frequency, Level vs. Frequency, Polar Diagram,
Histogram, Waterfall, Real-Time IF Panoramic Display
Display
Display Resolution
Typ. 1μv/m (-107dBm) to 9μv/m (-90dBm)
(Frequency Dependent)
DF Sensitivity
FFM (Fix Frequency Mode), WBM (Wide Band Mode), SCAN
(F-SCAN, M-SCAN), Frequency Hopping(up to 3 nets) with
2500hops/s
Operating Modes
1MHz/ 2MHz/10MHz/20MHzFrequency Span in Wideband Mode
400μsMinimum Detectable Burst Duration
Up to 1GHz/sec with 20KHz ResolutionScan Speed
100KHz/50 KHz/25KHz/20KHz
12.5KHz/10 KHz/8.33KHz/5KHz
2KHz/1 KHz/0.5KHz/0.2KHz
0.1KHz/0.05 KHz/0.02KHz
Channel Spacing (Depending on Selected Real Time Band Which)
60KHz/30KHz/15KHz/12KHz/7.5KHz/6KHz/5KHz/3KHz/1.2K
Hz/0.6KHz
Direction Finding Bandwidth
30KHz/15KHz/7.5KHzDemodulation Bandwidths
360Azimuth Range
2500 Hop/s (Expandable to 5000 Hop/s)Maximum Detectable Hopping Rate

 

VERSIONABC
Frequency Range30 to 1300 MHz1300 to 3000 MHz30 to 200 MHz
Antenna Type9-Element Circular Array8-Element Circular Array9-Element Circular Array
PolarizationVerticalVerticalSwitchable Active/Passive Mode
Nom. Impedance50Ω50Ω50Ω
DF Error (In Reflection Free Environment)≤2.5° rms, 30 to 200 MHz≤2° rms≤2° rms
Dimension (Diameter, Height)1.1 x 0.26 meter0.31 x 0.5 meter3 x 2.8 meter
WeightAbout 30 kgAbout 20 kgAbout 70 kg

 

SpecificationValue
Environmental Test StandardAccording to Mil-STD-810G
Operation Temperature Range (Indoor)0°C to 50°C
Operation Temperature Range (Outdoor)-25°C to +65°C
MTBF2000 hours
MTTR20 minutes
Dimensions (W x H x D)Approx. 60 x 70 x 70 cm
WeightApprox. 65 kg
StandardAccording to Mil-STD-810G
Power Supply220VAC, Maximum 1.5KVA
ITU-R Recommendation CompliantSM. 1053, SM. 1269, SM. 1370, SM. 1392, SM. 1537-0, SM. 1537-1, SM. 1598, SM. 1600-0, SM. 1600-2, SM. 854-1, SM. 854-3

 

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