Clear One AP400 User manual

Audio Conferencing
AP400 Audio Conferencing System
The Audio Perfect
®
400 (AP400) features ClearOne’s propri-
etary
Distributed Echo Cancellation®technology, which
enhances the audio quality in any conferencing application
by placing an echo canceller and an audio processor on
every microphone input. This technology is vastly superior to
traditional system-wide echo cancellation because it elimi-
nates gating
and audio processing problems that can hamper
such systems. The result is highly reliable, clear audio for use
in demanding
acoustical environments.
The AP400 features a built-in telephone interface for
complete phone line integration. The unit also features an
internal power amplifier for easy loudspeaker integration.
The AP400 also performs automatic gating of microphones,
mic mixing, audio processing, and matrix routing
– all in a
rack-mountable unit that seamlessly integrates the functions
of each component.
The AP400 provides extreme flexibility for your appli-
cations. Each unit has four mic /line inputs, four line-level
inputs (for codecs, VCRs, CD players, etc.), and eight line
outputs. Every input features automatic gain control to
compensate for loud or soft voices. The mic/line inputs also
offer equalization for continuous cut or boost, as well as high-
pass filtering to reduce unwanted low frequency noise.
For conference applications where you need more
microphone coverage, AP400s and AP800s can be combined
• Distance Learning
• Teletraining
• Telemedicine
• Courtrooms
• Conference Rooms
• Boardrooms
• Hotels
for up to 64 microphones. When multiple telephone lines
are needed, up to 16 AP10 units can also be added. All
units are G-Linked together using ClearOne’s high-speed
digital network bus, and can be controlled and monitored
via
a single RS-232 connection.
All features and functions of the AP400 are easily
configured with advanced AP-Ware™ software.
Features and Benefits
• Easy to install
– simple to operate.
•
Distributed Echo Cancellation technology on each mic/ line
input dramatically improves overall system performance,
flexibility, and setup.
• “Plug and play” capability for easy design, programming,
installation and maintenance
– no white noise setup.
• Automatic microphone gating reduces background
noise and reverberation, resulting in crystal-clear,
transparent audio.
• Simultaneous two-wire/four-wire capability enables video
and telephone participants to communicate simultaneously
with full-duplex audio.
•
Expandable (via the G-Link) to accommodate applications
requiring up to 64 microphones – all system parameters
are linked and function as one system.
• All inputs incorporate automatic gain control to com-
pensate for loud or soft voices, while the four mic/line
inputs offer equalization for continuous cut or boost and
high-pass filtering to reduce unwanted frequency noise.
• Matrix allows for simple routing customization for a wide
variety of applications and individual customer requirements.
• Full system configuration capabilities with advanced
AP-Ware software.
The AP400 provides high-quality audio for a wide
variety of conferencing applications.
Applications
The AP400 is manufactured and marketed by
ClearOne, formerly Gentner.

audio conferencing
Specifications
© 2002 ClearOne Communications, Inc. All rights reserved. Information in this document subject to change without notice. 802-150-100 Revision 2.0
ClearOne Communications ~ 1825 Research Way, Salt Lake City, UT 84119 ~ 1-800-945-7730 ~ www.clearone.com
Dimensions (LxDxH)
17.25" x 10.25" x 1.75"
43.8 x 26 x 4.5 cm
Weight
7 lb/3.18 kg dry
12 lb/5.4 kg shipping
Operating Temperature
32–100° F/0–38° C
Humidity
15% to 80%, non-condensing
Power Input Range
Auto-adjusting
100–240VAC; 50/60Hz
Power Consumption
30W typical
G-Link In/Out
Proprietary Network
RJ-45 (2), 38.4kbps, 110kΩimpedance
Category five twisted-pair cable 20'
(6 meters) maximum cable length between
two networked Audio Perfect products
RS-232
DB-9 female
9,600 (default)/19,200/38,400 baud rate
8 bits, 1 stop, no parity
Hardware flow control on (default)/off
Control/Status
DB-25 female A/B
Inputs A/B: active low (pull to ground)
Outputs A/B: Open collector, 40VDC max,
40mA each
+5VDC pins (2) (300mA over-current
protected)
Mic/Line inputs 1-4
Push-on terminal block, balanced, bridging
Impedance: 5kΩ
Nominal Level: adjustable, -55dBu, -25dBu,
0dBu
Maximum Level: -33dBu, -4dBu, +20dBu
Echo Cancellation: 120ms tail time (works
with 12dB of room gain)
Phantom Power: 24V, selectable
Line Inputs A-D
Push-on terminal block, balanced,
bridging
Impedance: 20kΩ
Nominal Level: 0dBu
Maximum Level: 19dBu
Outputs 1-8
Push-on terminal block, balanced,
bridging
Impedance: 50Ω
Nominal Level: 0dBm
Maximum Level: 19dBu
Speaker Output
Binding post 5W max into 4Ω
Telco Line
RJ-11 connector
POTS (plain old telephone service)
line or analog extension from PBX
Telco Set
RJ-11 connector
Connect analog telephone set
A-lead supervision provided
Audio Performance
Conditions: Unless otherwise specified, all
measurements are performed with a 22Hz to
22kHz BW limit (no weighting).
Frequency Response: 20Hz to 15kHz
±2dB
Noise (EIN): -125dBu, 15kHz BW,
max gain, Rs=150Ω
THD+N: <0.1%
SNR: 65dB re 0dBu
Dynamic Range: 85dB
Telco Audio Performance
Frequency Response: 250Hz to 3.3kHz
±2dB (AGC disabled)
SNR: >60dB re -15dBm on/off the
telephone line
THD+N: <0.2%, 250Hz to 3.3kHz
(AGC disabled)
Pre-Emphasis: +4dB @ 2kHz
TEC tail time: 31ms
TEC null: 55dB nominal
Approvals
FCC, ASA, CE
Matrix Mixing Parameters
8x8 matrix
Auto Mixer Parameters
Number of Open Microphones (NOM)
PA Adaptive Mode
First Mic Priority Mode
Last Mic Mode
Maximum # of Mics Mode
Ambient Level
Gate Threshold Adjust
Off Attenuation Adjust
Hold Time
Decay Rate
Microphone Input Configuration
Input Gain Adjust
Mic or Line Level
Phantom Power on/off
Echo Cancellation on/off
Mute on/off
Chairman Override on/off
High Pass Filter
EQ Adjust
AGC on/off
Auto Gate/Manual Gate/Gate Override
Adaptive Ambient on/off
Set-up Software
AP-Ware™