5-2 (E)
MAV-555
3. Audio Block
4. Raid Block
3. Audio Block
An audio signal is usually input from the SDI (COMPO-
NENT) IN terminal or AES/EBU terminal of an R1 port
(selectable). The audio signal input from the AES/EBU
terminal is input to the DPR-127 board through the CN-
1816 and MB-845 boards. If BKMA-511 (option) is
inserted into each port, the analog signal input to BKMA-
570 (option) is passed through the AUDIO I/F terminal on
the rear panel and directly sent from the rear panel to the
AD-160 board via a harness. On the AD-160 board, the
analog signal is converted from analog to digital and sent
to the DPR-127 board. The three types of signals (SDI,
AES/EBU, and analog) sent to the DPR-127 board are sent
to the sub-board (APR-44 board) of the DPR-127 board.
After one of these signals is selected, it is converted into an
HDD-write format (packing) and output to the DPR-127
board again. On the DPR-127 board, the output signal is
multiplexed with the compressed video data. On the DM-
120 board, PU-109 board, IF-751 board, and HDD (1
+
1),
the output signal is processed and recorded in the same
manner as for video data. On the HDD, IF-751 board, PU-
109 board, and DM-120 board, a signal is also processed in
the same manner as for video data during playback.
The reproduced audio data is input through the DPR-127
board to the sub-board (APR-44 board) and converted into
an HDD-write format (depacking). The data then branches
into two paths via the processing display. One is added to
an SDI signal and output to the DPR-127 board. The other
is converted into an AES/EBU signal by the APR-44 board
and output from the rear panel through the DPR-127, MB-
845, and CN-1816 boards. If BKMA-512 (option) is
inserted into each port, the reproduced audio data is output
from the APR-44 board to the DA-136 board through the
DPR-127 and MB-845 boards. The output data is then
converted from digital to analog and output to the AUDIO
I/F terminal on the rear panel through the harness. After
that, the output data is sent to BKMA-570 (option).
4. Raid Block
The raid block consists of a PU-109 board, IF-751 boards
(11), and HDDs (11). A data bus is connected from the
DM-120 (standard and optional systems) and FM-68
boards to the raid block. In a video system, two systems
are used in reciprocation via a 16-bit bus. In an audio
system, two systems are used in reciprocation via an 8-bit
bus. For the video system, the processing in raid level 3 is
carried out. For the audio system, the processing in raid
level 1 is carried out. For the video system, the data
divided into four blocks is input from the DM-120 board to
the PU-109 board. The input data is assigned to two
HDDs per block and recorded on eight HDDs in total. The
parity for eight HDDs is assigned to one HDD. For the
audio system, mirror data is input from the DM-120 board
to the PU-109 board and striped into two HDDs on the PU-
109 board. Data is output through the MB-853 board from
the PU-109 board to the IF-751 board corresponding to
HDD in a ratio of 1 to 1.
The IF-751 board mounts SPC controlled by SCSI. This
board interfaces with HDD through the MB-853 and CN-
1830 boards. During PB operation, data is ECC-processed
on the PU-109 board and output to the DM-120 board. On
the PU-109 board, data is automatically rebuilt or patrol-
sought using an empty time slot.
