4 CONNECTING THE AIM MODULE TO THE BUS
The MIL-STD-1553 Specification clearly defines the process of coupling subsystems to the
bus. This connection, called a stub, has two coupling options: Direct and Transformer
Coupled. In addition to these two methods of connecting to the bus, a Direct to Device
(Network) Coupling configuration is also an option. All three methods are described in this
section.
Direct Coupling
Direct Coupling connects the subsystem/terminal device
directly to the bus and can only be used in connections under one
foot in length.
Since a Direct Coupled stub provides only limited isolation in the
event of a device (subsystem or terminal) short, Transformer
Coupling is normally the recommended method of connecting to
the bus.