User guide

15
Cisco TelePresence System Codec C90 Physical interface guide
D14644.03 Codec C90 Physical Interface Guide TC4.1, February 2011.
© 2010-2011 Cisco Systems, Inc. All rights reserved.
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Audio inputs
Unused, but connected audio inputs must be
set to O to avoid unwanted audio/noise.
Microphone/Line In 1–8 (XLR)
8 x Balanced XLR sockets, audio input 1–8.
Main connector. The Microphone/Line In 1 is
the main connector for the microphone.
All eight microphone inputs are for balanced
electret microphones, 48V phantom powered
via XLR connectors.
The phantom powering of all eight XLR
sockets can be individually switched o. The
input will then be a balanced line level input.
All Microphone/Line In 1–8 are equipped with
acoustic echo canceller.
Use Microphone/Line In 1–8 to connect to an
external microphone amplier or an external
mixer.
Default conguration. In default conguration,
all Microphone/Line In inputs are enabled and
congured as microphones.
HDMI In 3, 4
2 x HDMI connectors, audio input 3, 4
Typical use: Use HDMI In 3 or 4 (2–8 channels)
to connect to external playback devices as
DVD players. Each input support up to two
channels at 48kHz sampling rate.
XLR pin-out
External view of socket
Pin 1: Gnd
Pin 2: Hot
Pin 3: Cold/neutral
8xMicrophone /Line In
2xHDMI In
XLR - Electrical Connector (Cannon XL
series with Rubber compound)
Pin: 19 17 3 1
Pin: 18 16 4 2
HDMI pin-out
External view of socket
Please refer to previous page for pin-out
scheme.
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Contents
Contact us
Introduction
The physical interface
Connecting to the codec
The physical interface