The BusTools/1553 analyzer software and the BusTools/1553-API store Bus Monitor data in binary files with a “.bmd” file extension. These are called “BMD files”, or “Bus Monitor Data files”. The purpose of this document is to explain this file format to allow users to write their own programs to read and process these files. This Application Note assumes a basic knowledge of 1553. For information on the MIL-STD-1553 protocol refer to the “MIL-STD-1553 Tutorial” document available from Condor Engineering Inc. Additional information can also be found in MIL-HDBK-1553A.