1-1. Main Parts Location
1-1-3. Description of Board Functions
IPM-82 board
*1
. The IPM-82 board backs up the file system, AV process data, VFL, and logs, managed by the CPU-
234 board, using the battery backed-up SRAMs and flash memories.
. The IPM-82 board can copy the file system to CPU-234 board when a file system in the CPU-234
board was lost. (Refer to Section 1-13-2.)
MS-53 board
. The MS-53 board communicates with hard disk drive array unit (abbreviates to RAID/MAV-S1000 or
*2
MAV-S1010) or receives the data in RAID (FTP) using one of the time slots.
. In the time slot into which no optional board (BKMA-1010/1020/1030/1040) is inserted, the MS-53
board outputs a sync signal to an SBX OUT signal instead of the optional board.
. The MS-53 board receives the time code signal input to the MAV-1000 and reads it into CPU.
. The MS-53 board distributes various timing signals output from the SG-250 board or various control
signals from the CPU-234 board to each slot through the MB-714 board. (The MS-53 board mounts a
driver circuit.)
. The MS-53 board generates a signal output to the STATUS OUT connector.
CPU-234 board (Sub-board of MS-53 board)
. The CPU-234 board manages a file system (refer to Section 1-13-1) and communicates with the
optional board as required.
. The CPU-234 board performs the system management in the hardware (power units, chassis fans,
device, and communication with RAID) and software of the MAV-1000.
. The CPU-234 board performs the communication processing of Ethernet and VS-BUS.
. The CPU-234 board uses flash memory as program memory and can download the firmware through
Ethernet.
SG-250 board (Sub-board of MS-53 board)
. The SG-250 board generates a clock signal and internal reference signal from the external reference
signal and distributes them to each slot through the MS-53 and MB-714 boards.
*1: VFL (Virtual File List)
Text file in which other multiple file cuts are described in the order of reproduction.
Variable-speed playback (JOG, VAR, or SHUTTLE) can be continuously carried out with the multiple cuts used as one material by treating this file in the
same way as one ordinary AV file recorded on a disk.
*2: Time slot
Each IO board (IO-160/163 board) or MS-53 board communicates in time sharing when accessing RAID in SBX (IN and OUT) signals. This is each slot
divided by time in that case.
The 30-frame time is divided into 1/10, and one time slot is formed by three-frame time. Eight IO boards and the MS-53 board use the nine time slots. The
remaining one time slot is used for another purpose.
Ten IDOs are assigned to each time slot. For the IO board, the ID used is fixed according to the physical position of the inserted slot.
1-4 (E)MAV-1000 |
ACEC
