Date printed: 24.01.12
76
D21m System
6.5.3 MadI Hd Cards
(
and
)
A949.04113x, A949.04133x, A949.04143x
The D21m MADI HD card is plugged into an HD card slot in the remote I/O
box and provides the link to the hub frame. 3 versions are available:
A949.04113x
Optical / multi-mode fibre version
A949.04133x
Optical / single-mode fibre version
A949.04143x
Twisted-pair version.
A949.04113x A949.04143x
A949.04133x
The two interfaces offer up to 64 audio channels with 44.1/48/88.2/96 kHz
operation, together with embedded control and user-accessible serial connec-
tion in each direction.
Starting with order nos. A949.041130, A949.041330 and A949.041430, the
MAIN/AUX switchover can be made using an additional GPIO on the card; it
utilizes the same connector as the RS422 interface. Depending on the desired
RS422 or GPIO mode, a flat cable has to be plugged accordingly on the
card. Refer to the component layout drawings on the next page. If RS422 is
selected, these cards are compatible with the earlier versions A949.04112x,
A949.04132x and A949.04142x (see
chapter 6.8.2
).
The auxiliary interface can be used as a redundant link or, in 88.2/96 kHz
operation, to extend the number of channels from 32 back to 64.
In slave mode, the cards extract the system clock from the incoming MADI
signals and provide it to the entire remote I/O box. They detect all other I/O
cards that are inserted into the D21m system and display their presence on
the front panel of the frame. Once all audio interface cards are plugged in,
pressing the
RECONFIG
key on the front panel confirms the configuration to
the system. Then all cards are activated and their audio signals are fed into
the MADI link. If switched to master mode, the cards run with an internal 48
or 96 kHz reference.
115.2 k
8, N, 1
Sync out
CH1...32 out
CH33...64 out
UART1 out
UART2 out
Sync out
CH1...32 out
CH33...64 out
UART1 out
UART2 out
Sync in
CH1...32 in
CH33...64 in
UART1 in
UART2 in
out
to D21m
Backplane
D21m card
control signals
UART
in
from D21m
Backplane
Sync in
CH1...32 in
CH33...64 in
UART1 in
UART2 in
MADI in
MADI in
MADI out
CH 1...32 in
Ch 33...64 in
CH 1...32 out
Ch 33...64 out
Ctrl
Ctrl
MADI out
Mode
56CH MODE
AUX
Red.
96k CH Ext.
MASTER/nSLAVE
UART MODE 1
UART MODE 0
UART
MODE 1
UART MODE 0
or UART MODE 1
UART MODE 1
96k/n48k
MASTER IF
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
0
0
1
0
1
0
1
1
0
1
0
1
0
1
0
MASTER IF
MASTER IF
MASTER IF
MASTER IF
MASTER IF
SPLIT MODE
MASTER AUX
SPLIT MODE
MASTER MAIN
56CH MODE
Mode
MADI
Decoder
Sync
Generator
Selector and
Demultiplexer
Selector and
Multiplexer
EEPROM
(D21m Command
Field Parameters)
Microcontroller
MADI
Decoder
MADI
Encoder
MADI
Encoder
MADI
Port
AUX
MADI
Port
MAIN
RS422
Port
(P3)
Pinout
Selector
DB9f
Conn.
Plug
Option
GPIO
Port
(P2)
Master IF
Selector
Logic
Input
Selector
Switch
