Cisco MXP Series Посібник з фізичного інтерфейсу - Сторінка 9
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MXP Series Codecs
Contents
Audio Sockets
Use Audio Input No.
Use Audio Input No. 5 to
4 to connect to an
connect to external playback
external microphone
devices or to telephone add-on
amplifier or to an
hybrids. For systems configured
external mixer.
with stereo I/O, connect the
VCR/DVD left channel to this
input.
NOTE!
Audio
inputs
4–6 are
referred
to as Line
input 1–3
in the API.
Microphone Inputs
Use Audio Output No. 1 to
Nos. 1–3.
provide a mixed signal of audio
Three balanced
from far end and local external
microphone inputs for
devices connected to input 5 &
electret microphones
6, in addition to dial tones.
balanced, 24V
This output should be connected
phantom powered via
to the local loudspeaker system,
XLR connectors.
which may, or may not, include
The phantom
the TANDBERG Digital Natural
powering of XLR
Audio Module.
socket No. 3 can be
For systems configured with
switched off. The Mic.
stereo speakers and SPDIF†
input No. 3 will then
active, the left and right channel
be a balanced line
of the loudspeaker signal will
level input.
both be provided on this output.
For systems configured with
stereo speakers and SPDIF†
not active, the left channel of
the loudspeaker signal will be
present on this output. The right
loudspeaker channel will be
provided on Audio Output No. 2.
SPDIF (Sony/Philips Digital Interface) is
†
used by the Digital Natural Audio module.
D14790.01 MXP Series Codec Physical Interface Guide, May 2011.
© 2011 Cisco Systems, Inc. All rights reserved.
Introduction
Codec 6000 MXP
Codec 6000 MXP
Use Audio Input No. 6 to
connect a VCR or DVD
player to the system. For
systems configured with
stereo I/O, connect the VCR/
DVD right channel to this
input.
Use Audio Output No.
2 (the AUX output) to
provide a mixed signal
consisting of audio from
the local side (AUX input
not included) and audio
from the far end.
This output should be
used when connecting a
telephone add-on system.
For system configured with
stereo I/O and with SPDIF†
active on Audio Output No.
1, this output will provide
the VCR left channel stereo
information.
For systems configured
with stereo I/O, stereo
speakers and SPDIF† not
active, this output will
provide the right channel
of the loudspeaker signal
(the left channel will be
provided on the Audio
Output No. 1).
Codec 3000 MXP
Settings
TIP!
Audio inputs Nos.
Out 1
5 & 6 are not equipped
mode
with acoustic echo
canceller. Connecting
Analogue
microphones to these
Analogue
inputs can therefore
Analogue
not be recommended.
Analogue
TIP!
Unused, but
connected audio inputs
SPDIF
should be set to Off to
SPDIF
avoid unwanted audio/
SPDIF
noise.
SPDIF
TIP!
Audio signal levels
expressed in volts
and dBu can be found
overleaf.
Signal type
Socket
Input impedance
Use Audio Output No. 3
(the VCR output) to provide
Output impedance
a mixed signal consisting
Max input level when set to min.
of audio from the local side
input level
(VCR input not included)
Max output level when set to max.
output level
and audio from the far end.
Max input level when set to max.
input level
This output should be used
Max output level when set to min.
when connecting a VCR to
output level
the system.
Gain range
For system configured with
Phantom power
stereo I/O and with SPDIF†
Phantom power resistor pin 2
active on Audio Output No.
Phantom power resistor pin 3
1, this output will provide
Max phantom power current
the VCR right channel
stereo information.
XLR pin-out
For systems configured
External view of socket
with stereo I/O, stereo
speakers and SPDIF† not
active, this output will
2
provide the mix of left and
right channel of the VCR
out signal.
Pin 1: Gnd
Pin 2: Hot
Pin 3: Cold/neutral
9
Physical interface guide
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Stereo Settings
Output Response
Stereo
Stereo
Audio Out 1
I/O
speakers
mode
Off
Off
Loudspeaker mono
Off
On
Loudspeaker L
On
Off
Loudspeaker mono
On
On
Loudspeaker L
Off
Off
Loudspeaker mono
Off
On
Loudspeaker L & R
On
Off
Loudspeaker mono
On
On
Loudspeaker L & R
Hardware Information
Microphone(s)
Audio
Input(s)
Balanced
Unbalanced
XLR-F
RCA/phono
2400 W
10 kW
(pin 2–3)
83 mVpp
15.5 Vpp
6.2 mVpp
1.2 Vpp
22.5 dB (16 steps of 1.5 dB)
24 V ± 5 %
1200 W
1200 W
12 mA
RCA pin-out
External view of socket
1
Signal
GND
3
Audio
Audio
Out 2
Out 3
Aux
VCR
Loudspeaker
VCR
R
VCR L
VCR R
Loudspeaker
VCR
R
Aux
VCR
Aux
VCR
VCR L
VCR R
VCR L
VCR R
Audio
Outputs
680 W
15.5 Vpp
1.2 Vpp
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