page 2 – 63
2001 / Jul 01
H A R D W A R E
In systems incorporating control surfaces and DSP, each control surface
link is made to a QAT port co-located with its corresponding DSP cards.
These “MT” ports carry all fader, switch, logic, LCD meter, source and
destination information to and from the control surface and the companion
DSP cards located in the Remote Tier racks. Local/Remote and Primary/
Secondary settings do NOT apply to ports configured as Mixer Transport
links.
While the QAT provides a tremendous amount of flexibility and routing
power, please note the following design aspects:
• There is no audio data on an MT link.
• Control surfaces may not be daisy chained together off a single MT port.
• Audio cards in a remote chassis do not communicate directly with each other.
• In a single Tier configuration, a remote chassis cannot be daisy chained to
another remote chassis.
Q
A
T
AUDIO
C
P
U
Q
A
T
Q
A
T
Q
A
T
Q
A
T
D
S
P
D
S
P
AUDIO LOGIC
LOGIC
Q
A
T
Q
A
T
D
S
P
D
S
P
AUDIO LOGIC
MASTER RACK HUB
AIR HUB
PRODUCTION HUB
NEWS HUB
SPARE
B
C
D
A
SURF 1
SURF 2
SURF 3
PROD SURF 1
PROD SURF 2
PROD SURF 3
B
C
D
B
C
D
AIR RACK 1
AIR RACK 2
AIR RACK 3
PROD RACK 1
PROD RACK 2
PROD RACK 3
A
B
C
A
B
C
HUBS
SURFACES
SATELLITE
RACKS
TYPICAL QAT SIGNAL FLOW
D
S
P
D
S
P
AUDIO LOGIC
2001 / Sep 03