R **ON A/C 106-149, 211-299, 301-399, 401-499,
(1) Data Retrieval A download of AIDS reports and SAR files, which are stored on the SSMM or recorded on the PCMCIA card through the MDDU or PDL is possible. For data retrieval the disk must be prepared by the GSE. The data dump is initiated either manually through the MCDU menu or automatically.
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K. Digital AIDS Recorder (DAR) (Ref. Fig. 009, 010, 011)
(1)
General The purpose of the DAR is to store serial data on an optical disk for on ground performance, maintenance or condition monitoring tasks.
(2)
DAR Construction The installed DAR is an extended storage Digital AIDS Recorder. The data are stored on an on-board rewritable optical disk. The quick access to the disk and the EJECT pushbutton is achieved by a door, incorporated in the front panel of the DAR. The storage medium is a standard 3 1/2" rewritable magneto-optical disk with a storage capacity of 128 MB per disk. The data are transmitted from the FDIMU in HARVARD BIPHASE Code with 64, 128, 256, 512 words per second. The standard is 128 words per second. The DAR front panel contains five pushbutton switches and a 16-character alphanumeric display to permit direct user configuration, status monitoring and command entry. One indicator lamp is located on the front panel for checking the status of the recorder. The DAR complies generally with ARINC 591 and is connected to the FDIMU. The status signals of the DAR are connected to the CTL PNL for indication of DAR FAIL and DAR TAPE LOW (MEDIA LOW). The DAR functional block diagram illustrates the internal interconnection of the functional modules.
(3)
DAR Functions The HARVARD BIPHASE data from the FDIMU are received in the interface board and transferred to the input data buffer. The data in the input buffer are then analyzed under software control to determine the sync word configuration and subframe length. After analyzing the data are subsequently transferred to the RAM and/or non-volatile memory prior for storage on the GSE formatted optical data disk. The DAR has an adequate BITE to facilitate self-testing, qualitative diagnostics collection and test status reporting. In case of discrepancies, the DAR sends a status signal to the FDIMU.
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Digital AIDS Recorder
Figure 009
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DAR Functional Block Diagram
Figure 010
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DAR - Interface
Figure 011
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**ON A/C 151-199, 201-210,
(1) Datatransfer between SAR and PDL To copy SAR data from the internal DMU internal SSMM to a floppy disk use the PDL/MDDU. The SAR is retrieved via PDL manually. File selection and automatic dump disc generation is done via AGS. The recording is aborted in case of following conditions:
-Recording time exceeds AGS defined limit
-To be downloaded data exceeds disc memory space (1.44 Mbyte)
K. Digital AIDS Recorder (DAR) (Ref. Fig. 009, 010, 011)
(1)
General The purpose of the DAR is to store serial data on an optical disk for on ground performance, maintenance or condition monitoring tasks.
(2)
DAR Construction The installed DAR is an extended storage Digital AIDS Recorder. The data are stored on an on-board rewritable optical disk. The quick access to the disk and the EJECT pushbutton is achieved by a door, incorporated in the front panel of the DAR. The storage medium is a standard 3 1/2" rewritable magneto-optical disk with a storage capacity of 128 MB per disk. The data are transmitted from the DMU in HARVARD BIPHASE Code with 64, 128, 256, 512 words per second. The standard is 128 words per second. The DAR front panel contains five pushbutton switches and a 16-character alphanumeric display to permit direct user configuration, status monitoring and command entry. One indicator lamp is located on the front panel for checking the status of the recorder. The DAR complies generally with ARINC 591 and is connected to the DMU. The status signals of the DAR are connected to the CTL PNL for indication of DAR FAIL and DAR TAPE LOW (MEDIA LOW). The DAR functional block diagram illustrates the internal interconnection of the functional modules.
(3)
DAR Functions The HARVARD BIPHASE data from the DMU are received in the interface board and transferred to the input data buffer. The data in the input buffer are then analyzed under software control to determine the sync word configuration and subframe length. After analyzing the data are subsequently transferred to the RAM and/or non-volatile memory prior for storage on the GSE formatted optical data disk.
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