Operation Manual

Soundcraft Vi Series™ User Guide 1112Page 2 - 14
MADI HD link card
This card provides audio and control connection with the Local Rack via MADI. The corresponding MADI
card in the Local Rack transmits the clock for the Stagebox down the MADI stream. The second input on
the card can be used to increase the sample rate to 96KHz, provide a redundant connection to the Local
rack or to connect to a second system if two consoles are to be used for a monitor/FOH conguration. The
MADI card indicates its clock status using the lock LED on the card. An RS422 link output is also tted,
allowing RS422 data to be transmitted via a ‘pipeline’ within the MADI stream from a corresponding port
on the Local Rack to allow remote RS422 control. This RS422 port can also be used to control the mic
preamp gain in the Stagebox if it is in stand-alone mode or digital snake mode.
Redundant MADI Cable Operation
The system can be used with either a single cable connected to the MAIN or AUX ports (usually MAIN), or,
for additional security, two cables can be used to provide fully-automatic redundant operation. The 3-posi-
tion INPUT SEL toggle switch on the Stagebox MADI card determines the mode of operation.
It is very important that this switch is set correctly!
For single cable operation: the switch must be set to either ‘MAIN’ or ‘AUX’, depending on which socket is
being used.
For dual redundant operation: the switch MUST be set to the ‘RED’ position.
In redundant mode, the system will automatically switch to the other cable if a fault is detected on one
cable. Note that it will then stay on the second cable even if the connection is restored on the rst cable.
This is to prevent intermittent switching.
NOTE: Do NOT operate with the switch in ‘RED’ mode when only one cable is being used.
Although this may appear to work, audio may not be restored if the cable is temporarily
unplugged.