- The OBM1553 system is used to connect a MIL-STD-1553B bus to a remote analyzer for monitoring purposes
- A typical application is an EMC immunity test on an avionic LRU appended on the MIL-STD-1553B: the EUT is exposed to a high EM field level in the chamber while the bus analyzer, unable to withstand the same field level, is to be placed outside in a remote position with respect to the bus
- The portion of the system in the chamber must of course be shielded while the portion in the control room does not present any specific shielding requirement.
- The OBM1553 optical link basically consists of dualchannel transmitters and receivers interconnected by means of bi-fiber optical cables providing the necessary isolation for the exchange of signals that have to cross the shielded room walls.
- The dual channel capability and the associated dualfiber connection is required by the MIL-STD requirement for redundancy of the bus.
- The system components are:
+ the dual channel shielded transmitter OBM1553S
+ the dual channel transmitter battery charger CB1
+ the dual channel unshielded receiver OBM1553B
+ the receiver container selectable either OMM- 1 or OMM
+ the bifiber cable type FB