WR-ALC/LYK, 380 2nd St Ste 104, Robins Air Force Base GA 31098-1638

59 -- ARN-108/112 FM IMMUNITY UPGRADE POC Tong Tang, Avionics Engineer, 912-926-9859 E-MAIL: For additional information contact, tong.tang@robins.af.mil. FM Immunity Requirement The Air Force has a requirement to upgrade the VOR/ILS and ILS-only receivers to comply with ICAO Annex 10 requirement for protection against FM broadcast interference by 01 Jan 2001. This requirement is otherwise referred to herein as Protected ILS or FM Immunity. Background on FM Immunity Requirement: In 1999, the Air Force prepared a Point Paper on FM Radio Protection which presented the following conclusions. (1)Operations can safely continue between 1 Jan 1998 and 1 Jan 2001, as published in national airfield publications, using host nation assessments of interference to non-FM protected receivers. (2)Beyond JAN 2001, there are no civil requirements for host nations to continue FM broadcast interference assessment for non-FM immune operations since civil aircraft will be equipped. (3) The Air Force should upgrade installed aircraft equipment to meet FM Immunity requirement in Europe, Africa, Middle Ease, and Russian airspace. (4) Aircraft not equipped with a stand-alone FM protected receivers by Jan 2001 will be noncompliant with regional/host nation requirements and may face severe operational restrictions. Problem: The R-1755/ARN-112 and R-1871/ARN-108 receivers does not meet the Protected ILS as defined by the ICAO Annex 10 requirement for protection against FM broadcast interference. There is an urgent and compelling requirement to upgrade these receivers for protection against FM broadcast interference and to protect against frequency modulated (FM) interference under new capabilities granted radio and television stations. We have been directed to accelerate an upgrade program to aircraft equipped with non-Protected ILS receivers by most viable and affordable solution. Upgrade Requirements: We have determined that the most viable, lowest risk and quickest solution is to upgrade the ARN-108 and ARN-112 Localizer Card Assembly to be FM Immune. The upgraded Localizer Card Assembly shall utilize same footprint and connectors, as the ARN-108 and ARN-112 and the upgraded design shall be available in the form of a kit that can be installed by the depot and I-Level shops. To avoid further delay in qualification testing, the existing power supply must be utilized (available from the ARN-108 and ARN-112 power supply inverter, DC to AC inverter, and Power Supply Regulator modules). Because the ARN-108 and ARN-112 receivers share commonality with respect to module performance and form factors, the FM Immunity Kit shall be a single module that will be dropped into both of these ILS receivers. For schedule and qualification testing reasons, the upgrade design shall impact only the ARN-108 and ARN-112 receiver and synthesizer module. All internal physical and electrical interfaces will remain compatible with the existing ARN-108 and ARN-112 design. The upgrade kit functions shall be compatible and be verifiable by the current depot test station and the F-16 AIS test station. Capability Questions: (1) Has your company designed a Landing System that is FM Immune and complies with the ICAO Annex 10 requirements? (2) Will the FM Immunity Kit utilize same footprint and connectors within ARN-108 and ARN-112 receivers? (3) Will the ARN-108/112 FM Immunity upgrade Kit impact effect only the Synthesizer module? (4) Will the FM Immunity Kit be compatible with the power supplied by the ARN-108/112 and the current Depot Tester and F-16 AIS tester? (5) Will the FM Immunity Kit interconnect physically and interface electrically with the ARN-108 and ARN-112? (6) Will the FM Immunity Kit be available for Qualification Testing July 00, for Qualification Acceptance Sept. 00, for Flight Testing Oct. 00 and Certification Oct 00? (7) Is the FM Immunity Kit commercially available? If so, please provide information relative to commercial contract terms and conditions. This is not a pre-solicitation notice that constitutes an Invitation for Bid or a Request for Proposal, and is not to be construed as a commitment by the Government. The Government will not reimburse contractors for any costs incurred in responding to this notice, or in subsequent exchanges of information. Organizations having the required expertise and capabilities are invited to submit information discussing such capabilities in a technical capability outline. Comments do not constitute a proposal, but will be considered as an open exchange of capabilities and ideas. Respondents will not be notified of the results of the source data received, nor will a source list be provided. The response date for this request is 15 Jun 00. Responses may be submitted via mail, faxed to (912) 926-1475, or e-mailed to tong.tang@robins.af.mil . Posted 05/31/00 (W-SN459944). (0152)

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