Gentner AP400 User manual

AUDIO PERFECT™ AUDIOCONFERENCING SYSTEM
AP400
PRODUCT OVERVIEW
The Audio Perfect™ 400 (AP400) pro-
vides the highest possible audio quality
available for a variety of conferencing
applications.The AP400 takes audio to
the next level with Gentner’s proprietary
Distributed Echo Cancellation™ technol-
ogy, which enhances the audio quality in
any conferencing application by placing
an echo canceller and an audio processor
on every microphone input.This technolo-
gy is vastly superior to traditional sys-
tem-wide echo cancellation, because it
eliminates the gating and audio process-
ing issues that often hamper such sys-
tems.The result is highly reliable, clear,
transparent audio for use in the most
demanding acoustical environments.
The AP400 features an integrated tele-
phone interface, which enables telephone
participants of an audio or videoconference
to sound as if they were actually in the
same room.The AP400 also has an inter-
nal power amplifier for easy installation of
a loudspeaker. In addition, the AP400 per-
forms automatic gating of microphones,
microphone mixing, audio processing and
matrix routing—all in a one-rack-mount-
able unit that seamlessly integrates the
functions of each component.
The AP400 provides extreme flexibility
for your applications. Each unit has four
mic/line inputs, four pre-configured line-
level inputs (for CODECs, VCRs, CD
players, etc.), and eight programmable
outputs (programmable meaning config-
ured with any input or combination of
inputs). Each of the mic/line inputs and
line-level inputs uses automatic gain con-
trol to compensate for loud or soft talk-
ers.The mic/line inputs also offer chan-
nelized 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,
AP400’s and AP800’s can be combined
for up to 64 total microphones. When
multiple telephone lines are needed, up
to 16 AP10 units can also be added. All
1.800.945.7730
1.801.975.7200 Send this document to any fax machine with Gentner’s Fax-On-Demand: 800.695.8110 Doc. #2018
units are G-Linked together using
Gentner’s high-speed digital network bus,
and can be controlled and diagnosed via
a single RS232 connection.
So relax! Whether your room is small,
medium or large, Gentner’s Audio
Perfect products will handle your most
demanding acoustic environments and
routing configurations!
APPLICATIONS
Distance Learning
Teletraining
Telemedicine
Courtrooms
Conference Rooms
Boardrooms
Hotels

Easy to install—simple to operate
Distributed Echo Cancellation™ tech-
nology on each mic/line input dramat-
ically improves overall system perfor-
mance, flexibility and setup
"Plug and play" capability for easy
design, programming, installation and
maintenance—no white noise set-up
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 simulta-
neously with full-duplex audio
Truly linkable, the AP400 can be
expanded (via the G-Link) to accommo-
date applications requiring up to 64
microphones—all system parameters
are linked and function as one system
Each of the eight inputs incorporate
automatic gain control to compensate
for loud or soft talkers, while the four
mic/line inputs offer channelized
equalization for continuous cut or
boost and high-pass filtering to reduce
unwanted frequency noise
Programmable matrix allows for sim-
ple system customization for a wide
variety of applications and individual
FEATURES/BENEFITS
AP400
AUDIO PERFECT™ AUDIOCONFERENCING SYSTEM
1.800.945.7730
1.801.975.7200 Send this document to any fax machine with Gentner’s Fax-On-Demand: 800.695.8110 Doc. #2018
customer requirements
On-the-fly configuration changes. Six
customizable preset programs can be
accessed from a remote control,
switch or front panel
Integrated touch-tone dialing for easy
dialing through remote control
Gentner’s Digital Signal Processing tech-
nology ensures crystal-clear audio with
the deepest, most reliable hybrid null
Selectable auto-answer and auto-dis-
connect enables integrators to choose
auto-disconnect without auto-answer
and vice versa
Optional remote control
Worldwide compliance—includes
FCC, CSA and CE
All this in a one-rack-mountable unit
4
wire 2 wire
Distributed
Echo
Cancelation speaker output
automatic
mic mixer line inputs
mic
inputs integrated 8x8 Router
Gentner AP400 Yes 4 Yes 4 Yes Yes Yes 5 watt
Biamp Voicecrafter 3000 No 2 No-mics are always on 1 No Yes No 5 watt
Biamp Voicecrafter 3010 No 2 No-mics are always on 1 No Yes Yes 5 watt
Sound Control AVT-24 No 0 No 1 No Yes Yes 0
Sound Control AVT-44 No 4 No-mics are always on 1 No Yes Yes 10 watt
Product

SPECIFICATIONS
DIMENSIONS (L x W x H)
17" x 1.75" x 8"
43.2cm x 4.5cm x 25.4cm
WEIGHT
7 lbs./3.18 kg dry
12 lbs./5.4 kg shipping
POWER
Auto-adjusting power module; 100-
240Vac; 50/60Hz; 30W
RS232
DB9 female, 9,600/19,200/38,400
(bps) baud
selectable
CONTROL/STATUS
DB25 female; (2) +5Vdc pins, 100mA
each (8) open collector status outputs,
20Vmax, 40mA each (8) input activa-
tion selectable; momentary or latching
ground
SPEAKER OUTPUT
Binding Post 5W max into 4 Ohm
G-LINK IN
RS485; 38.4kbps; 110kOhm imped-
ance, category-five twisted pair cable;
20-foot limit between networked units
G-LINK OUT
RS485; 38.4kbps; 110kOhm imped-
ance, category-five twisted pair cable;
20-foot limit between networked units
TELCO LINE
RJ11 connector—POTS (Plain Old
Telephone Service) line or analog exten-
sion from PBX
TELCO SET: RJ11 connector—analog
telephone set
MIC/LINE INPUTS
Connector: Removable Phoenix®block
connector, -55 or 0dBu nominal,
adjustable, balanced, bridging
Impedance: 4kOhms
Frequency Response: 20Hz to
15kHz ±2dB
Phantom Power: 24Vdc input, selec-
table
NOISE: EIN 20Hz to 15kHz – 125dBu
THD: <.03%*
LINE-LEVEL INPUTS
Connector: Removable Phoenix®block
connector, 0dBu nominal, adjustable,
balanced bridging
Impedance: 20kOhms
Frequency Response: 20Hz to
15kHz ±2dB
SNR: >85dB*
THD: <.01%*
LINE OUTPUTS
Connector: Removable Phoenix®block
connector, 0dBu nominal, adjustable,
balanced bridging
Impedance: 50 Ohms (designed to drive
>600 ohm inputs)
Frequency Response: 20Hz to
15kHz ±2dB
SNR: >85dB*
THD: <.01%*
TELCO AUDIO PERFORMANCE
Frequency Response: ±2dB from 250Hz
to 3.3kHz (with AGC disabled)
SNR: >60dB (reference at –15dBm
on/off the telephone line)
THD: <2%, 250Hx to 3.3kHz (ACG
disabled) (referenced at –15dBm on/off
the telephone line)
Pre Emphasis: +4dB at 2kHz
ECHO CANCELLATION TAIL TIME
>120 milliseconds, each gated input
TELCO CANCELLATION TAIL TIME
31 milliseconds
OPERATING TEMPERATURE
0°-50° C, 32° - 122° F
* All SNR and THD measurements are
referenced to maximum output level
with a band-pass of 20Hz to 20kHz
unless otherwise specified.
AP400
AUDIO PERFECT™ AUDIOCONFERENCING SYSTEM
ACA APPROVED
APPROVED
Specifications are subject to change without notice.

AUDIO PERFECT™ AUDIOCONFERENCING SYSTEM
AP400
Gentner Communications Corporation
1825 Research Way
Salt Lake City, UT 84119 USA
1.800.945.7730
1.801.975.7200
Fax: [phone]
www.gentner.com
Try Gentner Conference CallSM—dial:
1.800.538.7633 ©1998 Gentner Communications Corporation. Printed in USA, 11/98. Features, specifications, and descriptions are
accurate as of this printing. Gentner reserves the right to modify this information without prior notice or obligation.
Perfect Communication through Technology, Service, and Education.
TM
Send this document to any fax machine with Gentner’s Fax-On-Demand: 1.800.695.8110 Doc. #2018
Mute MuteMute
Mute
Mic 1 Mic 2 Mic 3 Mic 4
Network
VOLUME
VCR
AMX / Crestron
Remote Control
1
1
2
3
4
0
-4
-10
-30
+4
+8
+12
System
Meter Mic On
Inputs
Outputs
Routing
Enter Esc
Telephone
Line
Telephone
Set
Typical AP400 installation: