Auditronics 220 Digital Audio Console, Техническое руководство, Страница: 16 / 109

I N S T A L L A T I O N a n d P O W E R
page 1 – 7
220 / March 2000
Audio and Control Wiring
All audio and control I/O connections to the 220 console are made through
multipin DB-25 (or in the case of the OMD-220 Digital Control Ports, a DB-
15) connectors located on the top of the each module.
Connection Procedures
As supplied from the factory, the console requires no logic connections to
function. Therefore an orderly installation begins with the audio wiring. Note
this manual is organized by module type (inputs, outputs, monitor modules,
etc.); each chapter contains detailed wiring instructions for its module type.
Proceed through the manual, chapter by chapter, until all modules have been
wired to suit your particular installation requirements. Once proper audio
operation is verified, go back to each individual chapter and proceed with
control wiring.
Digital Audio Connections
CABLE - All AES/EBU input and output digital audio connections are
balanced and should be made using a high quality digital audio cable. Be sure
to select a digital audio cable with an integral drain wire of the same wire gauge
(AWG) as the twisted pair. Typical AES/EBU digital audio cable has a very
low characteristic capacitance per ft (pF/ft), and a nominal impedance of 110
Ω
.
High quality digital audio cable offers better signal transmission performance
versus typical analog audio cable, especially over long cable runs. Check the
cable manufactures data sheet to be sure the cable you plan to use will work in
your application.
CONNECTORS - All AES/EBU connections are made with the supplied
DB-25 male mating connectors. These crimp style connectors are the insula-
tion displacement type and will accept wire gauge 24 - 28AWG.
SPDIF INPUTS - The SPDIF (Sony/Philips Digital Interface) or “con-
sumer” digital audio interface is a two wire unbalanced signal typically on a
single RCA style connector. To connect SPDIF devices to the 220 console
simply wire the SPDIF center conductor (HOT) to the IND-220 “HI” input pin
and SPDIF shell (ground) to the IND-220 “LO” input. Connect the IND-220
“SHIELD” at the console end only.
Analog Insert Points
Certain module signals have insert patch points in their signal chains to
allow outboard audio processing. These include MONO MIC INPUTS (IND-
220).
Normally these points are internally bridged at the factory (via PCB-
mounted programming jumpers) prior to shipment. If you intend to use
outboard signal loops at these points, you must reprogram these jumpers. See
pages 2-3 (mic inputs).