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Enterprise Control System


COFDM Diversity Receiver Module for Vehicles
The Enterprise Control Systems Ltd (ECS) Coded Orthogonal Frequency Division Multiplexing (COFDM) modular diversity receiver has been specifically designed for reception of digital video transmission from either aircraft or ground-based transmitters.
  • General Description
  • Technical Data

General Description

A vehicle-based receiver system consists of the Video Link Diversity Receiver-Intermediate Frequency (VLDR-IF), two Low Noise Block (LNB) downconverters with antennas and, a Graphical Hand Held Controller unit (GHHC). The receiver will automatically select the matching code rate and demodulation scheme for any given input signal. Decryption is based on ‘Destinations’ and is fully automatic.
The ECS COFDM digital receiver can be used with a wide variety of covert and overt antennas. LNB downconverters may be fixed within the vehicle or mounted to the vehicle roof.
When used with either the ECS 1 W or 10 W COFDM transmitters the resultant encrypted video link is extremely robust and ideal for surveillance in built-up areas.
The VLDR-IF has two IF inputs for diversity operation. This has been shown to improve link range and resilience. The receiver will choose the input with the best signal quality on a carrier-by-carrier basis and in real time. Diversity operation has been shown to provide a 6 - 8 dB link budget improvement over a single antenna receive system.
Mobile applications of the vehicle-based receiver system include:
• Vehicle to vehicle
• Person to vehicle
• Aircraft to vehicle

Technical Data

Equipment Designation: VLDR-IF-XX
XX: Customer Specific System Configuration Number
IF Input Range: 475 - 850 MHz
Inputs: 2 x IF and DC
Power: 11 - 15 VDC. 1.2 A at 12 V nom
Video Output: CVBS and S-Video (Single Channel)
Audio Output: Line level 0dBm into 600 Ω
Connectors: Power: 2-pin Lemo
IF: N-Type
Video: BNC
Audio: 3-pin Lemo
Control: 5-pin Lemo
Data: 6-pin Lemo
Dimensions: 215 x 228 x 55 mm
Weight: 2.5 kg approx
Downconverter specification
Power: 11 - 15 VDC 250 mA at 12 V nom (DC fed via IF connection from receiver)
Connection: N-Type
Noise Figure: 1.4 dB typ. 2.0 dB max.
Input Sensitivity: -95 dBm typical, -92 dBm min
Hand Held Controller specification
Display of: Encryption code, video status, received signal to noise ratio, transmitter
temperature and battery status.
Additionally, GPS information is displayed.
Dimensions: 200 x 120 x 38 mm