 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] SMS: B28769      ]
 ] S. VENITSKY        ]    BFS PROGRAM NOTE         ] DR:  109676      ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE:  8/29/96   ]
 ] RI/310-922-1921    ]      RELEASE NOTE ( )       ]                  ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ]     OI-24 AND SUBS            ]  CREW ( )  GROUND (X)  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]           MAJOR SOFTWARE AREA:            ] OPS MODES AFFECTED:     ]
 ]BSL( ) BSS(X) GNC( ) SEQ( ) SM/SP( ) IPL( )]       0,1,3,6           ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA:  UPLINK                                          ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: MG038101 / 3.6.2.2.9                           ]
 ]_____________________________________________________________________]
 ] TITLE:                                                              ]
 ]          MDM SPC MULTIPLE TIME TAG EXECUTION ANOMALY                ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ] WHEN MDM SPC MULTIPLE UPLINKS ARE CONSTRUCTED SUCH THAT THEY ARE TO ]
 ] BE EXECUTED 1 SECOND APART, THE SOFTWARE PUTS THESE SPCS OUT        ]
 ] APPROXIMATELY 1.12 SECONDS APART, AND EVENTUALLY THE SOFTWARE PUTS  ]
 ] 2 COMMANDS OUT ON THE BUS TO THE MDM SIMULTANEOUSLY.  THE 2         ]
 ] SIMULTANEOUS COMMANDS MAY HAVE DETRIMENTAL EFFECTS ON THE HARDWARE  ]
 ] BECAUSE OF A POSSIBLE "LOGIC RACE" CONDITION THAT MAY OCCUR.  I.E., ]
 ] THE SECOND COMMAND MAY GET COMPLETED PRIOR TO THE FIRST COMMAND     ]
 ] BEING COMPLETED.                                                    ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] USER RESPONSE:                                                      ]
 ]                                                                     ]
 ] THE USER IS CAUTIONED TO NOT CONSTRUCT THE MDM SPC MULTIPLE UPLINKS ]
 ] 1 SECOND APART, BECAUSE EXECUTION OF THE COMMANDS MAY NOT MEET THE  ]
 ] USER'S INTENDED RESULT.  IF SPC MULTIPLE UPLINKS ARE CONSTRUCTED AT ]
 ] LEAST 2 SECONDS APART, THIS SIMULTANEOUS EXECUTION OF TWO COMMANDS  ]
 ] WILL NOT OCCUR.                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]RI: <S> D. CORBIN         DATE 09/26/96]                             ]
 ]    --------------------      ---------]                             ]
 ]ASD:   ERIC C. BINGHAM    DATE 10/15/96]                             ]
 ]    --------------------      ---------] DARRELL E. STAMPER 10/15/96 ]
 ]PF MGR:DEBRA I. ELDRIDGE  DATE 10/15/96]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]_____________________________________________________________________]
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