MIL-STD-1760 PDF

In common practice, an aircraft will support most of the MIL-STD signals, whereas the store needs to accommodate only those signals it needs to perform its mission. MIL-STD was intended to support both current needs as well as to provide growth capability as the technology matures. MIL-STD defines a Class I aircraft interface, which has four high bandwidth and two fiber optic interfaces, and a Class II interface, which has only two high bandwidth and no fiber optic interfaces. It is a dual-redundant differential serial interface that operates at a rate of one megabaud. The MIL-STD interface includes four signal lines, five lines used to assign one of 31 communications addresses to the store one address is reserved , and address parity and return lines, for a total of 11 lines. High-speed option[ edit ] To support weapons applications such as digitized video, and transfers of terrain maps, target images, and program files, Revision E of MIL-STD includes an option for higher speed data communication.

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In common practice, an aircraft will support most of the MIL-STD signals, whereas the store needs to accommodate only those signals it needs to perform its mission. MIL-STD was intended to support both current needs as well as to provide growth capability as the technology matures. MIL-STD defines a Class I aircraft interface, which has four high bandwidth and two fiber optic interfaces, and a Class II interface, which has only two high bandwidth and no fiber optic interfaces.

It is a dual-redundant differential serial interface that operates at a rate of one megabaud. The MIL-STD interface includes four signal lines, five lines used to assign one of 31 communications addresses to the store one address is reserved , and address parity and return lines, for a total of 11 lines.

High-speed option Edit To support weapons applications such as digitized video, and transfers of terrain maps, target images, and program files, Revision E of MIL-STD includes an option for higher speed data communication.

High-Speed specifies a gigabit-speed interface based on Fibre Channel , operating at 1. Note that either the aircraft or the store can be the source of the signal. The high bandwidth signals are intended for carrying video and other high frequency signals, such as those transmitted by the Global Positioning System GPS.

The low bandwidth signals are intended for carrying audio and other low frequency signals. Discrete signals Edit There are two sets of discrete signals. The Interlock discrete is used by the aircraft to determine whether the store is attached to the aircraft.

This interface uses two signals, the Interlock, and the Interlock Return. These signals are simply connected together within the store, and when the store is released from the aircraft this connection is broken on the aircraft side. The aircraft determines the presence of the store by measuring the continuity between the two signals. Certain stores, typically weapons, may be commanded into modes that can be hazardous if not managed properly, such as the arming of a warhead.

Activation of the Release Consent discrete signal is used to ensure that the store will only accept such a command when it is authorized to do so.

Fiber optic interface The fiber optic interface is intended for much higher digital communications speeds than can be supported by MIL-STD, such as Fibre Channel, which can operate at gigabaud rates. The interface will be energized to supply the weapon with electrical power when the air crew determines that hostilities are imminent. The weapon electronics will initialize itself, including running a battery of self tests and starting its MIL-STD communications interface.

These commands will commence with requests for the weapon to report its status, and will continue with commands that ready the weapon for its mission, such as navigation initialization and target coordinates. The aircraft may use the MIL-STD interface to send current position and time to the weapon, and a high bandwidth signal to route the GPS satellite signal from a topside aircraft antenna to the weapon.

The SMS will verify that the weapon release conditions have all been fulfilled, and it will activate the signals not part of the MIL-STD interface that cause the weapon to be released. In the case of a bomb, this is typically done by energizing an electro-explosive device that simultaneously opens the hooks that hold the bomb on the aircraft during carriage, and also operate a plunger that pushes the bomb away from the aircraft at high speeds there is a tendency for the weapon to remain in close proximity to the aircraft after the bomb hooks open.

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