 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] DR:              ]
 ] A. OGLETREE        ]    PASS PROGRAM NOTE        ]     51108        ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE:            ]
 ] IBM/282-8440       ]      RELEASE NOTE( )        ] 10/16/87         ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ] REL 19 AND SUBS               ]  CREW (X)  GROUND (X)  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]        MAJOR SOFTWARE AREA:       ] OPS MODES AFFECTED:             ]
 ]SSW ( )  GNC ( )  VU ( )  SM/PL (X)] S2, S4                          ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA: PAYLOADS, I/O                                    ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: S4.1                                           ]
 ]_____________________________________________________________________]
 ] TITLE:  SUB-COMMUTATION OF PDI PARAMETERS                           ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ] WHEN PDI PARAMETERS ARE SUB-COMMUTATED IN THE PCMMU, I.E. AT TIME   ]
 ] X PARAMETER A IS IN A RAM ADDRESS AND AT TIME X+1 PARAMETER B IS    ]
 ] IN THAT SAME RAM ADDRESS, THE SM SOFTWARE PROCESSES THE DATA AS     ]
 ] THOUGH ONLY ONE VALUE IS BEING ACQUIRED. THIS CAN CAUSE DISPLAY     ]
 ] VALUES TO TOGGLE AND FAILURE TO ANNUNCIATE OUT OF LIMITS CONDITIONS ]
 ] OR FALSE ANNUNCIATION TO OCCUR.                                     ]
 ]                                                                     ]
 ] FOR IUS MISSIONS; SPEC 200 PARAMETERS ARE SUB-COMMUTATED WHEN THE   ]
 ] PDI IS PROCESSING THE 16 KBPS FORMAT.                               ]
 ]_____________________________________________________________________]
 ]USER RESPONSE:                                                       ]
 ] FOR PAYLOADS THAT HAVE SUB-COMMUTATED PARAMETERS BE AWARE THAT:     ]
 ]                                                                     ]
 ] 1) CARGO CONTROL SPEC DATA MAY TOGGLE AND DISPLAY ERRONEOUS         ]
 ]    INFORMATION. THE TIMING OF THIS DATA TOGGLE IS DEPENDENT ON THE  ]
 ]    DEFINITION OF THE PAYLOAD TELEMETRY STREAM. THE STATUS FIELD FOR ]
 ]    FDA PARAMETERS MAY TOGGLE AT THE SAME RATE.                      ]
 ]                                                                     ]
 ] 2) CLASS 3 ANNUNCIATION OF AN OUT OF LIMITS CONDITION FOR THOSE     ]
 ]    PARAMETERS REQUIRING FDA MAY NOT OCCUR. THE USE OF THE NOISE     ]
 ]    FILTER TO ELIMINATE NUISANCE ALERTS SHOULD BE EXAMINED, HOWEVER  ]
 ]    THIS MAY ALSO PRECLUDE ANNUNCIATION OF AN ACTUAL ALERT           ]
 ]    CONDITION.                                                       ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]IBM: WYATT COOPER         DATE 08/05/88]                             ]
 ]    --------------------      ---------]                             ]
 ]SSD: SAM ANKNEY           DATE 08/10/88]                             ]
 ]    --------------------      ---------]JACK BOYKIN         08/17/88 ]
 ]PF MGR: J. D. BAGWELL     DATE 08/15/88]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]___LOUTO J. BRAQUET____________08/18/88]_____________________________]
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