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

Brand:

Category:

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

Range	Description
30-3000 MHz (Expandable to 6 GHz)	Frequency
20 MHz (Expandable to 80 MHz)	Instantaneous Bandwidth
100 Hz	Frequency Resolution
0.1 ppm	Frequency Accuracy
-105 dBc/Hz @10 KHz	Phase Noise
≥ 80 dB	Image Frequency Rejection
≤ 16 dB	Noise Figure
80 dB	Adjacent Channel Suppression 10 KHz
AM, FM	Modes of Demodulation
≥ 120dB Offline (Including AGC) ≥ 70dB Online	Dynamic Range
Correlative Interferometer, Music (option)	DF Method
1° RMS	Instrument 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
1°	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/20MHz	Frequency Span in Wideband Mode
400μs	Minimum Detectable Burst Duration
Up to 1GHz/sec with 20KHz Resolution	Scan 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/7.5KHz	Demodulation Bandwidths
360	Azimuth Range
2500 Hop/s (Expandable to 5000 Hop/s)	Maximum Detectable Hopping Rate

VERSION	A	B	C
Frequency Range	30 to 1300 MHz	1300 to 3000 MHz	30 to 200 MHz
Antenna Type	9-Element Circular Array	8-Element Circular Array	9-Element Circular Array
Polarization	Vertical	Vertical	Switchable Active/Passive Mode
Nom. Impedance	50Ω	50Ω	50Ω
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 meter	0.31 x 0.5 meter	3 x 2.8 meter
Weight	About 30 kg	About 20 kg	About 70 kg

Specification	Value
Environmental Test Standard	According to Mil-STD-810G
Operation Temperature Range (Indoor)	0°C to 50°C
Operation Temperature Range (Outdoor)	-25°C to +65°C
MTBF	2000 hours
MTTR	20 minutes
Dimensions (W x H x D)	Approx. 60 x 70 x 70 cm
Weight	Approx. 65 kg
Standard	According to Mil-STD-810G
Power Supply	220VAC, Maximum 1.5KVA
ITU-R Recommendation Compliant	SM. 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