IRP professional sound LP DWCS24-MU Wireless conferencing system User Manual dwcs manual

IRP professional sound products, LP Wireless conferencing system dwcs manual

Exhibit D Users manual 2 1033 b 5

dwcs2.4 wireless digital
conference system
User Manual
Copyright 2000 IRP professional sound products L.P.
All rights reserved. No part of this manual may be reproduced in any form (printing,
photocopy, microfilm, or other procedures) without written permission of IRP
professional sound products L.P. or processed or multiplied using electronic systems.
Seite 2
General Description 3
FCC Certification 5
CE 6
Possible System and Delivery Configuratíons 7
Main Unit 9
Microphone Stations 14
Carrying Case with integrated Battery Charger
Technical Specifications
FCC Information
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) This device may not cause harmful interference, and (2) This device must
accept any interference received, including interference that may cause undesired operation. In
accordance with FCC requirements, changes or modifications not expressly approved by IRP
professional sound products, LP could void the user’s authority to operate this product.
Seite 3
dwcs2.4 Digital Wireless Conference System
System Description
dwcs2.4 is a new wireless conference
system, developed by „IRP professional
sound products", which operates in the
2,4GHz range. The data and audio
transfer is full digital and all audio
signals are digitally encoded. The
changing digital signal encoding makes
an unwanted hearing of the spoken
words practically not possibly. (hearing
security is the fundamental problem of
all wireless conference systems, since
these units use the UHF analog audio
transmission. With an accordingly
equipped UHF device it is easily possible
to receive the discussions of a
confidential conference in a neighbouring
A further considerable advantage is the
circumstance that the signal
transmission is
licence-free in the
2,4GHz range. Thus a
local installation or a
mobile system used
at different locations is very simplified.
The installation and the operation of the
devices are comparatively simple. Except
the connections of the antennas and the
power cord no further cables are
necessary. The installation of the two
antennas is also likewise problem-free
and easy. The microphone stations are
carried in a special carrying case with
integrated battery charger and are
immediately ready for use.
Front View of the Main Unit
Changes to improve the design or performance are reserved.
Seite 4
Being connected to the world is NOT always what you want ..
the dwcs2.4 with digital encoding gives you full privacy when you need it!
100% Privacy - Licence-free
Seite 5
FCC Certification
This equipment has been tested and found comply with the limits for class A digital
device, pursuant to Part 15 of the FCC rules.
Seite 6
Seite 7
Possible System and Delivery Configurations
one Mainframe,
one Audio Board,
one Controller Board,
one Antenna Splitter Board 2x 1in4,
seven SMA Antenna Patch Cables (prewired),
one Controller Patch Cable (prewired),
two Antenna Cables (N-Steckverbinder),
two Antenna Cable Adapters (N-Connector to SMA Connector) for furniture installation,
two Antennas 2,4GHz (SMA-Connector),
the appropriate number of regular Microphone Stations,
one Chairman Microphone Station,
one (two) Carrying Cases with integrated battery charger (12 Microphone Stations each,
two cases combined to one carrying and changer unit).
two Mainframes,
two Audio Boards,
one Controller Board,
two Antenna Splitter Boards 1x 1in8,
one blind panel,
eleven SMA-Antenna Patch Cables (prewired),
two Controller Patch Cables (prewired),
two Antenna Cables (N-Connector),
two Antenna Cable Adapters (N-Connector to SMA-Connector) for furniture installation
two Antennas 2,4GHz (SMA-Connector),
the appropriate number of regular Microphone Stations,
one Chairman Microphone Station,
one (two) Carrying Cases with integrated battery charger (12 Microphone Stations each,
two cases combined to one carrying and changer unit).
the appropriate number of Microphone Stations as single units,
single Battery Chargers for the Microphone Stations (no carrying case with integrated
battery charger),
one or two Mainframes inclusive Boards, Cabling and Antennas as described above.
Seite 8
System Setup
1. Scope of Supply
Before the installation, insure that all accessories were completely supplied. If
something from the scope of supply is missing, please call your dealer.
2. Battery Charger (Microphone Stations)
All microphone stations should be fully charged before the first use. Depending on the
scope of supply, use the carrying case with integrated charger unit or the individual
battery charger.
Using the carrying case with integrated charger the following is to be considered:
All microphone stations should be locked in their position in the foam material
inserted. Check the fixed position of the microphone stations. With appropiate fixing
to the foam material insert a safe contacting to the charge connector is ensured.
If you have a double carrying case for 24 microphone stations, connect both parts
with the supplied connection cable.
Connect the power connection cord to the appropriate wall outlet.
The charging time is about 3.5 hours. The integrated battery is a NiMH and doesn’t
require complete unloading before the new charging.
3. Checking the individual Boards and Cabling of the Main Frame
Depending upon delivery version, all boards should be installed ito the mainframe and
connected completely. If necessary check the wiring. See figure “Module Wiring” on
page ...
Check all connectors for tight connection and mechanical stability.
NOTE: the radio net address of the system and the radio channel number of the radio
circuits are factory-installed. If you should use several systems in the same
environment at the same time, it is necessary to change the radio net address. Thus
it is prevented that the systems influence each other. Both the audio board and the
microphone stations must be modified. These procedures should be executed by
qualified personnel only.
4. Power On
Connect the power connector on the main unit with the supplied power cord to a
power outlet (please check the appropriate voltage range, 230V or 110V, labelled at
the rear side of the power supply board in the main unit).
Immediately after switching on the power, three blue LEDs on the front of the main
unit light up. These blue LEDs display the status of the power supply (three different
DC-voltages: 5V, +18V, -18V).
After approximately 2 seconds on each installed audio board four green LEDs light up.
These LEDs indicate that the individual radio circuits are operating.
Seite 9
5. Complete System Setup
After the complete battery charge of the microphone stations, these units are
immediately ready to work. On the rear side of the microphone station is an On/Off-
switch. After switching on the unit a small green LED on top of the station (in front on
the right) lights up and signals the ready status. As long as the talk button (MICRO)
is activated, this green LED is off. Instead the red LED in the MICRO button is on.
After deactivating the talk button, the green LED lights up again.
After pressing the talk button on the microphone station the connection to main unit
is made. The audio transmission is assigned to one audio channel. The appropriate
green LED on the audio board changes to red (two-color LED). A maximum of four
microphone stations can be activated at the same time. With four active stations the
fifth pushed talk button generates only a short acknowledgement (red LED of the talk
button) and switches to the regular status again. Only after deactivating one of the
other stations a new station can be activated.
That applies only to the use of ONE audio board. Using two audio boards, further
more four channels are selectable. The number of active microphone stations
increases thereby to eight.
The mixed signal of all active microphone stations is audible over the individual
loudspeakers in the microphone stations (with the correct prewiring of the main unit).
Always the active station itself does not receive this audio foldback signal for the
prevention of acoustic feedbacks. The loudspeaker of the active unit is switched off.
The chairman microphone station is equipped with three buttons instead of the single
button on the regular station. Using the PRIORITY button, all other stations are
muted. The PRIORITY button itself works in the same way as the MICRO button (It is
not necessary after pressing the PRIORITY button to press the MICRO button. The
PRIORITY button works as a talk button.). The active time is terminated here also by
pressing the button for the second time.
More deatais see: Microphone Stations, page ...
6. Using a Sound Reinforcement System
For the use of a separate sound reinforcement system it is necessary to use one of
the „audio out“ connections on the audio board. By setting the jumpers on the audio
board it is determined whether single channels or the mixed signal are fed through
these connections. The audio output are ballanced with a maximum level of +10 dBu.
7. Feeding an external Sound Signal into the System
Using the second audio input on the controller board it is possible to feed an external
signal into the systems audio chain. This signal is added to the mixed signal audible
in the loudspeakers of the microphone stations.
Seite 10
Main Unit
The main unit of the conference system dwcs2.4 consists in its basic configuration of one
mainframe, which contains all necessary single modules. This mainframe is factory-
installed with the necessary boards, configurated and prewired. The wiring between the
individual modules should only be changed to reconfigure the entire system.
The mainframe is intended for the installation into 19"-rack, but could be used also as
free standing single device. IRP however always recommends the installation into an
appropriate housing, since then all the wiring between the modules is protected against
accidental disconnection and injuries. Every male connection in the prewired system
would lead to unnecassary problems. Your specialized dealer can offer a range of 19”-
housings for one or more mainframes.
In case of a fixed rack-installation a sufficient ventilation should be guaranteed at any
time. Unsuitable for the operation and storage of the devices are spaces with too high air
humidity or high dirt load.
Single Modules of the Main Unit:
1. Power Supply
The power supply for the conference system dwcs2.4 is integrated into the mainframe. It
is factory-adjusted to the necessary voltage (110V or 230V) and accordingly marked.
The power supply supplies three single voltages, which are necessary for the operation of
the system: +5V, +18V and -18V. The operating condition for the three individual
voltages is displayed on the front panel by three blue LEDs. After switching the system
on, all three LEDs light up and display the ready status of the device. If one of the LEDs
should not light up, please call your specialist dealer.
Verwenden Sie zum Netzanschluß nur entsprechend zugelassene Netzkabel bzw. das
werksseitig beigelegte Schutzkontakt/Kaltgerätekabel.
Use only the supplied power cable or a specified main power cable. The device should not
be switched off and on again without interruption (like all processor-controlled electronic
devices). Please wait at least 5 seconds after switching the unit off, until switching it on
again. By using several mainframes for one system, all mainframes must be switched on
at the same time in a time window of maximum two seconds.
2. Controller-Board
The controller board provides for the system control, controlling the log-in and log-out
processes of the individual microphone stations and assigns the appropriate radio
channels and transmission cycles.
The dwcs2.4 operates as a FDMA/TDMA system (Frequecy Devision / Time Devision) with
dynamic channel assignment.
Each microphone station calls in first (after pressing the talk button) at the controller
board. In case of an available audio channel in the system, the station is assigned to this
channel with the certain transmission cycle. The station receives the command to send
the awaiting audio data via this channel. In case all channels are busy, the call is
Seite 11
The individual boards of the system are connected by a Netlink control data bus (RJ-11
The assignment of the microphone stations in the controller board takes place in the base
version via an automatic self selection process. Up to four or eight microphone stations
can be activated at the same time. In a further system version it is possible to administer
the microphone station management over an attached control computer.
The controller board is equipped with the two audio input connectors. The two incoming
signals are mixed together and fed to the foldback channel. This channel is transmitted
to every microphone station and the signal is audible in every single station’s
loudspeaker. This digital signal is encoded also to ensure the proposed privacy of the
entire system.
In the regular setup one of the two audio inputs is connected to one audio output of the
audio board to enable the foldback channel (mix of all microphone stations in the
stations’ loudspeakers). The second input can be used to feed an external signal (sound
signal of any media device, PC, video player, etc..).
Farther for the external control and configuration of the system a RS-232 connection is
attached to the controller board (9-pin Sub-D connector). The connection to a PC or a
media control system is made by a serial 1:1 cable.
By pressing the AUX button on the chairman microphone station a read relay on the
controller board is activated to supply a contact closure for special purposes. The contact
output (open/closed relay contact) is accessable on a Phoenix 2-pin connector. The
contact output is loadable with max. 50V and 1A.
The controller board is equipped with two transmitting and one receiving antenna
connections. These are connected by SMA patch cables with the antenna splitter board.
Via an eight-pin DIP-switch on the controller board the radio net address of the system is
determined. This radio net address is necessary, in order to be able to operate different
systems in the same environment. Also each microphone station belongs to a cewrtain
radio net address. On the microphone stations the addess is changes internally via the
programmer port.
3. Audio-Board
The audio board is equipped with two radio circuits for four audio channels. Each radio
circuit is assigned to two audio channels using different transmission cycles. For the radio
circuit eight radio channels are available (channel zero to channel seven). Via two
address jumpers on the audio board every radio circuit is assigned to a certain radio
channel. Using two or even more audio boards, these channels must be set up in thew
way that every radio circuit is transmitting a a separate channel. Setting the jumper to
channel “eight” switches the circuit off.
(See also figure: Audio-Board, Jumpers on page .. and figure Modul-Wiring on page ..)
The audio data are transmitted in individual packets in the given transmission cycles. The
package size to the data is constant. The received audio data is decoded on the audio
board into a steady digital audio signal and afterwards decoded into an analog audio
system. After proper amplification the audio signal is fed to the certain audio output
connector on the audio board. The maximum output level of the electronically ballanced
outputs is +10dBu.
Each of the two radio circuits is connected to the antenna splitter board via one send and
one receive antenna patch cable. Thus a total of four SMA patch cables are connected to
the audio board.
The available four audio outputs channels can be used in two different ways. Via jumpers
on the board the outputs are configured. For every channel can be choosen whether it
carries the individual channel’s audio signal or the mix of all four channels of this audio
board. For a separate sound reinforcement system it is recommended to use the
individual channels of all four outputs and mix these signals with an automatic mixer (IRP
Voice-Matic) to increase the gain before feedback. Thus a significant higher
reinforcement level is achievable.
Seite 12
The audio board is also equipped with four LEDs to indicate the operational status. Four
LEDs belong to every radio circuit. Two of this four LEDs are two-color LEDs and display
the status of the radio transmission. After switching on the system these LEDs display
GREEN. This indicates that the circuits are locked to the system and ready to
transmit/receive data. As soon as a microphone station is activated and a channel of the
radio circuit is occupied, the LED will change to RED. The other two LEDs of each group
of four indicate the real audio level transmitted from the microphone station.
4. Antenna Splitter Board
There are two versions of the antenna splitter board: “2x 1in4” and “1x 1in6”. For the
use of one audio board in the system (four audio channels) the antenna splitter “2x 1in4”
is used. Using two audio boards it is necessary to use two antenna splitter boards “1x
Each antenna splitter board is equipped with N-connectors for the connection of the
antenna cables. The transmitting and the receiving antenna are identical and have no
differences in the handling. The individual splitter outputs of the antenna splitter are
connected by SMA patch cables to the appropriate boards. Each audio board has two
antenna inputs and two antenna outputs. The controller board has one antenna input and
two antenna outputs. The remaining unconnected SMA connector must be terminated
with a 50-Ohm-termination connector.
(See figure: Module Wiring)
Seite 13
Abb. Module-Wiring (System with one Audio-Board):
Seite 14
Abb. Module-Wiring (System with two Audio-Boards):
Seite 15
Abb. Block Diagram Audio-Board
Seite 16
Abb. Block Diagram Controller-Board
Seite 17
Abb. Audio-Board, Jumper Settings
Jumper 1
Left and Center bridged = Audio Channel 1 Mixed Signal
Center and Right bridged = Audio Channel 1: Single Channel 1
Jumper 2
Left and Center bridged = Audio Channel 2 Mixed Signal
Center and Right bridged = Audio Channel 2: Single Channel 2
Jumper 3
Left and Center bridged = Audio Channel 3 Mixed Signal
Center and Right bridged = Audio Channel 3: Single Channel 3
Jumper 4
Left and Center bridged = Audio Channel 4 Mixed Signal
Center and Right bridged = Audio Channel 4: Single Channel 4
Jumper 5, 6
Binary Code to determine the radio channel of the first and the second
radio circuit:
Seite 18
Microphone Stations
Two versions are available:
The regular microphone station dwcs2.4DM and the chaiman
microphone station dwcs2.4CM.
Regular Microphone Station:
On the rear side of the microphone station is the On/Off switch. After switching on the
unit with a fully charged battery, a green LED lights up on the front panel of the station.
(It applies also here that the unit should not be switched on directly after switching it off.
Please wait at least 5 seconds, before switching the unit on again.)
Also on the rear side is the connector for the battery charger and the headphone
connector. Connecting a pair of headphones to the station switches the internal
loudspeaker off.
The RJ-11 connector is used for programming purposes and should not be used without
purpose. A necessary reprogramming and reconfiguring of the microphone station should
be handled only by specialized personnel.
Each microphone station is equipped with a rechargeable battery. The actual working
time of the fully loaded battery is at least eight hours. The battery is charged by the
optional highspeed charger or with the microphone station accordingly attached into the
carrying case with integrated battery charger. No special maintenance of the battery is
necessary. In the case of a defect the battery it can be exchanged any time and problem-
On top of the microphone station the high-quality electret goosyneck microphone with
lighting ring and the 1/4-wavelength antenna for the wireless communication is attached.
The antenna should not be covered during the use of the substation with the hand or by
any devices.
Seite 19
After pushing the MICRO button the red LED in the button and the red ring on the
microphone light up. If a free audio channel is available the microphone station is locked
to the main unit and starts sending digital encoded audio data. The red LED and the red
ring light continuously. If there is no audio channel avaibalbe, the red LED and the ring
switch off and the green stand-by LED lights up again. The MICRO button (and also the
PRIORITY button in the chairman station) need to be pressed once and the connection
will hold as long as the button is not pressed the second time. After pressing the button
the second time, the connection is terminated and the red LED is switched off.
As long as the microphone station is active, i.e. as long as the microphone is connected
through, the internal loudspeaker of this station is switched off. That is necessary to
avoid feedbacks.
The electronics in the individual station has to fulfill two functions: communication with
the main unit to connect and log-in the station and second the transfer of the audio
signal of the microphone itself. The audio signal will be digitally encoded and transmitted
as 2.4GHz radio signal to the main unit.
Each microphone station has its own integrated loudspeaker. The mixed signal of all
audio channels is (also digitally encoded) transmitted to all microphone stations. Thus
using the dwcs2.4 conference system it is not necessary to use a separate sound
reinforcement system. Further any audio signal (max level of +10dBu) can be fed into
the controller board in the main unit. This way e.g. the sound signal of a media
presentation can be made audible over the microphone stations.
The number of possible microphone stations in one system is almost unlimited (up to
Chairman Microphone Station
The chairman microphone station enables the activating of the microphone in two ways.
First the chairman station can be used as a regular microphone station: Pressing the
MICRO button anables the connection to the main unit and if an audio channel is
available, the connection is made. If there is no free audio channel, no audio
transmission is possible. The second possibility is to use the PRIORITY button. Pressing
this button, all other microphone stations are muted and the connections cancelled. Only
the chairman microphone station is connected and put through. The audio signal will be
transmitted until the PRIORITY button is pressed the second time and during this time no
other microphone station is able to log-on to the system.
It is possible to use several chairman microphone stations in one system. These stations
are all able to be activated in the PRIORITY mode at the same time.
Seite 20
Audio Connection (Audio Board and Controller Board):
Phoenix-Connector MC 1,5 / 3-ST-3,5 3-pin
Pin 1:
Pin 2:
Pin 3:
Auxiliary Connection (Controller Board):
Phoenix-Connector MC 1,5 / 2-ST-3,5 2-pin
Pin 1:
Pin 2:
Antenna Connections:
Main Antenna Connections: N-Connector
Antenna Patch Cables: SMA-Connector
Power Connection:
Standard Power Cord 110 / 220V AC
Highspeed Charger Connection:
Headphones Connection:
3,5 mm Mini-Jack
Data and Programmer Connection (for service only):
RJ-11, 4-pin
Seite 21
Technical Specifications
2,4 Gigahertz, no licensing, no restrictions
Encoded digital transmission for 100% privacy
Up to 8.000 transmittermics per system
Up to 8 open channels at the same time
Autonomous switch on/off of mics
System response within 10 msec
Optional request to speak operator software
IRP System-Signalprocessing
Chairman- Override/ Priority
8 hours permanent transmission/16 hrs. Standby
intelligent search for unused channels
Design Tabletoptransmitters and mics
Easy Setup
Easy mobile use
Premium audio quality
Almost invisible antennas
Battery remote surveillance
Intelligent quick charge within 3 hours
Worldwide service
Data and Audio Transmission: 2,4GHz Range (2400 MHz - 2483,5 MHz)
Transmission: 1 mW
Audio Channels: max 16 plus 1 Foldback Channel
Power Supply: integrated Power Supply 230 / 110 V (50 / 60 Hz)
Output Impedance: 200 Ohm
Max. Input Level: +4dBu (+10dBu Peak)
Audio Inputs (Foldback Channel): electronically balanced
Input Impedance: 20 kOhm (unballanced connection: 10 kOhm)
Max. Input Level: +4dBu (+10dBu Peak)
AVM-IRP audio products GmbH
European Corporate Headquarters
Mülheimer Freiheit 132,
51063 Kõln/ Germany
Phone: 0221-640-3335
Fax: 0221-640-2184
e-mail: info@avm -
Website: www.avm -
IRP professional sound products L.P.
U.S. Corporate Headquarters
1225 Greenbriar Dr. Ste R
Addison, Illinois 60101
Phone: 630-860-1993
Fax: 630-860-1997

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