ELMER A MAC Alenia Marconi Communications SpA Company INTERCOMMUNICATION SYSTEM SP-1450 The SP-1450 system is centralized, digitally controlled audio management system which provides: Control, amplification and interfacing for all external communications on the aircraft A sophisticated and flexible intercom network The SP-1450 system installation utilizes fibre optics and appropriate wiring layout to reduce crosstalk and EMI to a minimum in order to satisfy the TEMPEST requirement. Control is effected via MIL-STD-1553 B digital data links or dedicated Remote Control Panel to perform the switching function and via asynchronous serial bus between User’s Unit and Central Switching Unit. The system’s configuration includes: Switching UNITSP-1451 Headset Interface Unit (HIU) SP-1452 Main Control Panel (MCP) SP-1453 Secondary User Unit (SUU) SP-1454 Direct Voice Output/Warning Tone Generator (DVO/WTG) SP-2049 A single Switching Unit support up to 8 Main Users, 4 Secondary Users provides interfacing and control for up to: 8 Transmitter-Receiver units 1 ANDVT Crypto Device Narrow Band 12 Nav/Mission Aids 4 Telebriefing/Ground Support Channels 2 Crypto Device for Wide Band 1 Link-11 Modem (for HF and V/UHF) 1 Sonar stereo Different configurations for different aircraft types utilize common units and modules. Software controlled function selection and amplification ensure maximum operating flexibility adaptability and growth capability. Improved reliability and maintainability is achieved by continuous BIT (Built-in-Test) routines, and dual separated power supplies. Basic features Tested to TEMPEST requirements according AMSG 720/784 Airborne applications in very hostile EMI/EMC environments Internal microprocessor control for monitoring and supervision of system’s operation Microprocessor controlled BITE, with automatic identification of the faulty Line Replaceable Unit (LRU) Modular construction Extremely efficient thermal design and low power consumption Complete remote controlled by external computer (VIA MIL-STD-1553B) Fully compliance with MIL-E-5400 Technical description The SP-1450 Intercommunication System (ICS) provides management and control of the external and internal communications on-board various aircraft. The ICS functions allow: Use of any radio on any type of service (LINK-11 data, crypto/plain voice) Unlimited selection from the main user units, of any external/internal communication channel plus NAV-AIDS/SONAR/ESM, with facilities for simultaneous reception of all channels. Selection from the secondary user units of the internal communication channels, with reception capability of the radio channels. The system also provides speech and tone warnings to minimise pilot’s workload and enhance flight safety. Relay function between HF and V/UHF channels. CASS/DICASS capability. Emergency functionalities in Back Up Intercom-Mode Note: basic configuration with 6 Main Users and 6 T/R Radio Technical characteristics GENERAL Asynchronous Serial Bus: Data Format 11 bit/word Data Rate 9600 bit/sec Rise time less than 10 m sec Level 0/5 volt Impedence 100ohm balanced Audio Interface: Bandwidth 300 to 3500 Hz Input Level (microphone) 250mV/150ohm 100uV/5ohm Output Level (headphone) 200mW ± 1.5dB into 8ohm/600ohm Primary Power 28Vdc as per MIL-STD-704B Power Consumption 160 watt ENVIRONMENTAL Operating Temperature: -40°C to 71°C Storage Temperature: -55°C to 90°C Humidity: up to 95% Altitude: 70,000 feet EMC: as per MIL-STD-461 and MIL-STD-462 TEMPEST: as per AMSG-720 B and AMSG 784 PHYSICAL Dimension (mm)/Weight NH90 MCP 146W x 95H x 90D / 1kg HU 150W x 60H x 90D / 0.7kg HIU 150W x 60H x 90D / 0.6kg DVO/WTG ARINC 600: 2 MCU / 2.2kg ASU 1/2 ATR Short / 8.5 Kg EH 101 MPC 146W x 133H x 90D / 1kg SUU 150W x 60H x 90D / 0.7kg HIU 150W x 60H x 90D / 0.6kg BUIU 150W x 60H x 90D / 0.8kg SwU 1/2 ATR Short / 8.5kg INTERFACES MIL-STD-1553 B or Remote Control Panel RELIABILITY AND MAINTAINABILITY MTBF (as per MIL-HDBK-217 D): 1400 hours MTTR: 15 minutes ELMER SpA 00040 Pomezia (Rome), Italy - Viale dell’lndustria 4 Telex: 610112 Elmer Fax (39-6) 91091203 Phone(39-6) 910911 1000/95/NC-E2014