AN / ALR-69

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The AN / ALR-69 is a digital radar warning system for combat aircraft . It is used by the US Corporation Raytheon produces.

description

The ALR-69, which is based on the AN / ALR-46 , was designed to warn pilots of combat aircraft in good time before detection by ground-based radar systems . For this purpose, four antennas are attached to the airframe of the carrier platform. The system can detect and identify radar radiation in the frequency range from 0.5 to 20 GHz. Reprogramming is also possible so that new radar systems can also be identified.

The system was produced in series from 1978, with over 3,500 devices delivered by the preliminary end of production at the end of 2002. In the meantime, an unmanageable number of changes and upgrades have been made, as the system had to be adapted several times to new threats and requirements.

The Danish company Radartronic A / S has designed a radar warning system for helicopters based on the ALR-69. This system is tailored to the requirements of the Danish military and is known as "ALR-DK" or "Mini-69". In the basic version, it weighs approx. 13.6 kg and dispenses with part of the receiver equipment, which reduces the frequency range covered.

AN / ALR-69A (V)

The ALR-69A (V) represents the current variant of the ALR-69 series. If you compare it with the original system, only the dimensions and the requirements for the infrastructure have remained the same, the electronic system has been developed from scratch . Therefore, the production lines were started up again in 2004, although they had only been closed two years earlier. This unusual change of course by Raytheon can probably be explained by the enormously high degree of distribution and the associated customer potential.

The system itself is fully digitized and no longer has any essential analog components. Modern computer components were used, for example fiber optic data lines, which are modular and have a high level of reliability. The signal processing is carried out by means of four digital signal processors and two PowerPC CPUs, whereby the system can process over 20 billion instructions per second . The architecture is based in some areas on the AN / ALR-67 (V) 3 , which also uses PowerPC CPUs.

The US Air Force plans to replace a large number of old ALR-69s with this new variant.

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