COFDM Soft Case Receiver System

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Enterprise Control System

Diversity Soft Case Receiver System (High Definition)

The Coded Orthogonal Frequency Division Multiplexing (COFDM) Diversity Soft Case Receiver System (High Definition) consists of all the components of the new Enterprise Control Systems Ltd (ECS) ground station system. The system is housed in a 5U 19’’ rack fly away case for temporary and mobile use.

Diversity Soft Case Receiver System (High Definition)
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  • General Description
  • Technical Data

General Description

The Coded Orthogonal Frequency Division Multiplexing (COFDM) Diversity Soft Case Receiver System (High Definition) consists of all the components of the new Enterprise Control Systems Ltd (ECS) ground station system. The system is housed in a 5U 19’’ rack fly away case for temporary and mobile use.

External to the Soft Case Unit are three antennas and a Low Noise Block (LNB) downconverter. The antennas include an active switched Multiple Sector Antenna (MSA), an omnidirectional antenna and a Global Positioning System (GPS) antenna. All other components of the system are installed within the soft case: a Half Rack COFDM Video Link Diversity Receiver, an Half Rack Antenna Control Unit (ACU) and, a fold-out HD 17’’ rack monitor.
The Diversity Soft Case Receiver System (HD) provides decoding and monitoring of all signals contained within an ECS COFDM HD downlink. All information within the ECS COFDM HD downlink is decoded within the Diversity Receiver. The downlink may consist of up to two video channels with associated audio. GPS information is also multiplexed onto the MPEG Transport Stream of the aircraft transmitter. The Soft Case Receiver outputs the HD signal in DVI and HD-SDI format. If the transmitted signal is a Standard Definition (SD) video signal this will be output in composite (CVBS) format.
 
GPS information from the aircraft transmitter is fed to the ACU to select the link-facing sector within the MSA. This provides high gain reception with an excellent range. Using an omnidirectional antenna in diversity improves link resilience: the highest quality COFDM signal is chosen from the two antenna inputs on a carrier-by carrier basis and in real time.
The Diversity Soft Case Receiver System (HD) has been designed to be portable, lightweight and rugged whilst maintaining full functionality of static ECS receivers.

Technical Data

 Soft Case Receiver System (HD) Options

• Frequencies between 1.2 and 6.5 GHz.
• Advanced Encryption System 256-bit (subject to export licence) or Substitution Cipher Encryption
• Configuration of baseband data, video and audio output according to system capability and customer requirements.
Soft Case Receiver System (HD) includes:
• Soft Case Unit comprising of the soft case shell, all internal cables, power distribution and a mains power lead
• COFDM Evenlode Rack Diversity Receiver (rigidly installed within the case)
• Evenlode Rack Antenna Control Unit (rigidly installed within the case)
• 17’’ TFT LCD fold-out monitor (rigidly installed with the case)
• GPS Antenna and cable (external to the case)
• Multiple Sector Antenna, IF cable and data/power cable (external to the case)
• Omnidirectional antenna, line-powered Low Noise Block downconverter, RF and IF cables (external to case).
Soft Case Receiver Unit specification:
Size: 630 x 740 x 360 mm (case complete) approx
Weight: 25 kg approx
Power Supply: 90 - 264 VAC,
COFDM Video Link Diversity Receiver specification:
Sensitivity: -92 dB min (IF input sensitivity into the receiver)
-95 dB min (RF sensitivity
, including the LNB front end or MSA antenna)
Channel Bandwidth: 5,6,7 and 8 MHz
Video Channels: 2 simultaneously at full frame rate
Channels: Pre-selectable frequency channels (16 max)
Receiver Status Display: 128x64 Dot Matrix display
Receiver Video Monitor: Integrated 5” LCD video monitor
Baseband Outputs: HD (DVI and HD-SDI) (Ch A & B), CVBS (Ch A & B), Audio MPEG L1 x 2 (stereo) (Ch A & B), NMEA 0183, RS-232 Control, MPEG2 Transport Stream (ASI).
Optional 10/100BASE-TX interface for encapsulated Transport Stream output and IP control input.
Decryption: Advanced Encryption System 256-bit (subject to export licence approval) or Substitution Cipher Encryption
Antenna Control Unit specification:
GPS Display: Altitude, lat and long position, bearing and heading of the transmitting unit and time
Antenna Display: Antenna selected, auto/manual, channel selected
Control: Sector auto/manual selection, sector selection, channel up/down, mains on/off
Monitor specification
Monitor type: 17’’ TFT LCD fold-out from 1U 19’’ rack
Resolution: 1440 x 900
The system described here includes a High Definition Soft Case Receiver, a GPS active antenna, an external downconverter with an omnidirectional antenna and, a Multi-Sector Antenna. Other arrangements of external components are available according to customer range and portability requirements.