COFDM Transmitter

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Enterprise Control System


The Patriot Video Transmitter uses Coded Orthogonal Frequency Division Multiplexing (COFDM) to provide a resilient and reliable one-directional link. Capable of being programmed in the field, the Patriot carries high quality Standard Definition (SD) video, audio, and data to the full range of Enterprise Control Systems Ltd (ECS) receivers.

  • General Description
  • Technical Data

General Description

The transmitter is a ruggedised, light-weight and compact unit designed for covert applications. A range of ECS receivers are available including hand held, briefcase, static and vehicle-based equipment depending on the customer’s specific requirements.
The standard unit operates on a single Radio Frequency (RF) channel; multi-channel versions are also available with channel selection via an optional hand held controller or software running on a computer.
The Patriot transmitter can be fitted with an optional Global Positioning System (GPS) receiver module such that the unit’s position may be transmitted as part of the data stream. The Patriot has an integral heat exchange system to ensure continued operation in harsh environments.

Technical Data

Frequency Coverage: 1.4 GHz band
1.8 GHz band
2.4 GHz band
4.9 GHz band*
With channels operating within a10 % proportional bandwidth.
Channel Bandwidth: 8 MHz
Output Power: Up to 1 W (preset)
Modes: QPSK 1/2, 2/3 code rate (user programmable) 1/4, 1/8 guard interval (user programmable)
Encryption: Substitution Cipher Encryption or AES 256 (AES is subject to export license approval)
Video: CVBS.
Audio: 2 audio channels (1 stereo pair)
Data: Up to 115k Baud (RS232)
Supply Voltage: 12 VDC nom. 11 - 15 VDC
Supply Current: 2.0 A nom at 12 VDC (1.4GHz Band)
Size: 170 x 174 x 34 mm
Weight: 1.1 kg
Operating Temperature: -10º to +45º C
Enclosure Protection: IP55
* For the 4.9GHz Band Patriot contact ECS for size, current and weight.