 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] DR:              ]
 ] T. METCALF         ]    PASS PROGRAM NOTE        ]       39054      ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE: SEPT. 1987 ]
 ] LSIS/282-8436      ]      RELEASE NOTE( )        ] REV A: 05/23/94  ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ] REL 19 AND SUBS               ]  CREW (X)  GROUND (X)  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]        MAJOR SOFTWARE AREA:       ] OPS MODES AFFECTED:             ]
 ]SSW (X)  GNC ( )  VU ( )  SM/PL ( )] G1, G6, G2, G3, G8, G9, P9,     ]
 ]                                   ] S2, S4                          ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA: BCE                                              ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: SANU                                           ]
 ]_____________________________________________________________________]
 ] TITLE:                                                              ]
 ]         BCE ELEMENT BYPASS ON POWER TRANSIENT DETECTION             ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ] POWER TRANSIENTS ON MULTIPLE BTU'S READ BY A SINGLE CHAIN OF BCE    ]
 ] ELEMENTS WILL RESULT IN SEVERAL OF THE EFFECTED BTU'S BEING         ]
 ] BYPASSED. SPECIFICALLY, THE SRB DATA ACQUISITION (LL1, LL2, LR1,    ]
 ] LR2 CHAINED TOGETHER), HFE/MFE INPUT TRANSACTIONS (FC'S AND EIU'S   ]
 ] TOGETHER), THE SM PL HIGH RATE TRANSACTION, AND THE GNC9 PF LOW     ]
 ] RATE TRANSACTION ARE SUBJECT TO THIS BEHAVIOR.                      ]
 ]                                                                     ]
 ] THE SRB DATA ACQUISITION WILL BE AFFECTED NOMINALLY AFTER THE LL    ]
 ] AND LR MDM'S ARE POWERED ON, AS WELL AS IF MULTIPLE LL'S AND LR'S   ]
 ] EXPERIENCE POWER TRANSIENTS FOLLOWING THE NOMINAL SITUATION. THE    ]
 ] HFE/MFE INPUTS WILL BE AFFECTED ONLY IF POWER TRANSIENTS ARE        ]
 ] EXPERIENCED ON FC'S AND EIU'S SIMULTANEOUSLY.                       ]
 ]                                                                     ]
 ] ANY BYPASSABLE TRANSACTION IS SUBJECT TO THE LOSS OF A MDM IF A     ]
 ] POWER TRANSIENT ERROR OCCURS FOLLOWING ANY OTHER ERROR ON THAT BCE. ]
 ]_____________________________________________________________________]
 ]USER RESPONSE:                                                       ]
 ] NOMINAL SRB CASE: ISSUE AN I/O RESET OR SRB BUS SELECT TO RESTORE   ]
 ] THE LL/LR ELEMENTS. TWO RESETS/SELECTS WILL BE REQUIRED IF THE      ]
 ] LL/LR MDM'S ARE NOT POWERED ON PRIOR TO THE FIRST SRB DATA          ]
 ] ACQUISITION CYCLE.                                                  ]
 ]                                                                     ]
 ] OTHER CASES: AN I/O RESET, FC OR PL STRING MODING OR SRB BUS SELECT ]
 ] SHOULD BE PERFORMED WHENEVER A BCE ELEMENT BYPASS IS DETECTED AND   ]
 ] THERE IS EVIDENCE OF A POWER TRANSIENT.                             ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]LSIS: HUGH D. STOVALL     DATE 07-12-94]                             ]
 ]     -------------------      ---------]                             ]
 ]FDSD: W. R. PRUETT        DATE 07-16-94]                             ]
 ]     -------------------      ---------] DARRELL E. STAMPER 07/22/94 ]
 ]PF MGR: KAYLENE KINDT     DATE 07-15-94]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]_______________________________________]_____________________________]
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