STANAG 3910
STANAG 3910 is a NATO standard for an avionics - data bus for the European Fighter Aircraft (EFA). STANAG 3910 is an (optical) high-speed data bus with a transmission frequency of 20 MHz. The optical bus is controlled via an electrical MIL-STD-1553 bus, the structures are therefore identical. A data message can currently be 4096 data words in size.
Transfer process
The transfer is initiated via the MIL-STD-1553 BUS. The transmitter announces on the 1553 BUS who it would like to send data to. And learns whether he is allowed to broadcast or not. Once this has been negotiated, the data is transmitted to the receiver via optical light pulses via the glass fibers. This type of transmission is also called EFABus.
There is also an extended version, the EFABus Express (EFEx). This was designed for tranche 2 of the Eurofighter . This version is fully compatible with MIL-STD-1553 and the mixed EFABUS (STANAG 3910). However, communication on a purely optical level can also take place here.
commitment
The data bus is used in the Eurofighter for internal communication.