AKG WMS PRACTICAL EXAMPLES
Power cable Antenna cable A Antenna cable B

2 x RA 4000 B

Antenna booster

Room 2

Antenna booster Antenna booster

Room 3

Antenna booster ZAPD 21

ZAPD 21

Room 1

Room 4

PSU 4000

CU 4000

8 x SR 4000

2 x PS 4000

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WMS 4000 10-CHANNEL SETUP
EXAMPLE: 10-CHANNEL SYSTEM FOR TOUR SOUND
Fitting all components into flight cases as well as the shortest possible setup time are essential for festivals with several acts performing in succession. While one performer is on stage, backstage preparations for the following act must be completed so that it can be started without any drawn-out interruptions due to alterations or soundchecks. Wireless systems in particular require meticulous performance tests to be carried out both regarding RF and audio signals before they are connected to the FOH mixer. The advanced software of the SR 4000 receiver makes all this easy. Rehearsal Mode, Auto Setup, and Frequency Scan are just a few of the features that help set up all the RF In the example shown above, a complete connections quickly and eficiently. 10-channel wireless system including antenna splitters, power supply unit and headphone However, the ultimate quality of the audio sig- amplifiers can be fitted into a compact 8 U nal delivered by the receiver can only be tested rack. You can also fit two small flight cases with by connecting the receiver to the mixer, which five charging units each for the transmitters, so is practically impossible once the show has star- that all transmitters can be charged completely and simultaneously within just one hour. ted. Two HPA 4000 headphone amplifiers, each connected to five receivers, eliminate this problem, enabling you to check audio signal quality quickly and reliably without an additional mixer. And, the complete tour sound package takes up so little space that it can be transported in a standard station wagon the ideal solution for touring bands.
Tour Sound The WMS 4000 is specifically suited for small tour setups, since the large variety of selectable channels allows you to find a working setup for practically any application. For example, a complete 4-channel system can be fitted into a flight case measuring only 6 U high (see below). Thanks to the integrated PSU 4000 power supply unit and the PS 4000 antenna splitter with two front antennas, all you need to do is connect a single power cable! All other components, such as the transmitters, can be stored in a 2 U drawer.
Specification: Amount 10 x Item SR 4000 Description True diversity receiver

HT/PT 4000

Handheld or portable transmitter

Charging unit

Central power supply

PS 4000

Antenna splitter

HPA 4000

Headphone amplifier

SRA 2B

Active wideband directional antenna
WMS 4000 16-CHANNEL SETUP
EXAMPLE: 16-CHANNEL SYSTEM FOR MOBILE USE
Although most venues are equipped with fixed wireless installations, special performances frequently require specific mobile systems. The reasons for this may vary, but the basic requirements are the same: a highperformance wireless system in a portable rack, whose audio signals can be fed to the local system simply through a multicore cable. Key prerequisites are minimum space requirements, quick cabling and clearly arranged controls. mitters and receivers, it comprises antenna splitters and power supply units, thus minimizing the necessary amount of antenna, power and DC cables. rack. Just two antenna cables and two power cables were connected to the rack. By comparison, the IVM 1 In-ear Monitor System also installed in the rack, with just two channels, needed the same amount of feeders as Especially the amount of power feeder cables a 16 (or 20) channel wireless system. was substantially reduced, since four antenna splitters, 16 receivers and active anten- Apart from the convenient and space-saving nas, as well as one spare antenna splitter and arrangement, this setup helped to achieve a four spare receivers, were powered by only pleasant side effect as it substantially two PSU 4000 power supply units. reduced hum from power cables.

Our example is a mobile 16-channel system By daisy-chaining the antenna splitters, all for a musical performance. Apart from trans- antenna cable runs were kept within the
The Vienna Konzerthaus Along with the Vienna State Opera and the Golden Musikvereinssaal (concert hall), the Vienna Konzerthaus is one of the most famous venues in Vienna. The Vienna Konzerthaus increasingly stages non-classical performances, such as musicals or rock concerts. Its many years of cooperation with AKG have resulted in optimum sound for widely differing requirements.
Specification: Amount 16 x Item SR 4000 Description True diversity receiver

RA 4000 B

Omnidirectional wideband booster antenna

AB 4000

Antenna combiner
WMS 4000 mobile rack Front view of the rack. The receivers and antenna splitters are clearly visible. Hard to believe that all these components are powered by just two power supply units (see the three blue LEDs).
WMS 4000 Wiring Even large systems do not have to drown in cable clutter. All cable runs are clearly visible, while the reduced number of cables helps diminish hum and improve heat dissipation from the rack.
Gala Musical Couples, August 2003 This performance was scheduled at short notice and therefore needed a high-performance mobile wireless system. The AKG WMS 4000 was the obvious answer. The detailed system layout is shown on the following pages.
WMS 4000 46-CHANNEL SETUP
EXAMPLE: 46-CHANNEL SYSTEM FOR AN OPERA HOUSE
As regards planning, technology, and monitoring, wireless installations in opera houses pose a particular challenge. Unfailingly high sound quality and "invisible" installation of the components are basic requirements for offering the audience a unique auditory experience. Structural issues pose much greater difficulties: as a rule, opera houses are historic buildings subject to strict conditions with regard to constructional alterations. And the numerous backstage rooms, such as dressing rooms, maintenance passages etc. are an environment that is rather hositle to RF propagation. Above all, however, there is one feature typical of many opera houses: the so-called iron curtain that separates the stage and auditorium. A massive metal wall, it completely blocks radio signals when lowered. In our case, we needed a 46-channel system centrally controlled from the control room. The stage was approx. 70 m (230 ft) away from the control room and had to be covered with the minimum possible number of antennas. Besides, the transmitters in the dressing room had to be operational, so that the correct functioning and level settings could be tested prior to showtime. The system uses two passive directional antennas placed close to the control room to cover the stage. Antenna combiners connect two omnidirectional booster antennas in the dressing room, which receive the radio signals from behind the stage. This ensures perfect transmission and monitoring of all transmitters even during intermissions, when the iron curtain is lowered.

High-tech for pure enjoyment Every opera or theater audience has a right to enjoy exceptional artistic performances and excellent sound. Therefore, microphones and wireless components must not only work perfectly but be more or less invisible in order not to disrupt the visual appeal of the stage set and performers. The compact WMS 4000 and AKG MicroMics provide the ideal combination for this type of application.
Specification: Amount 46 x Item SR 4000 Description True diversity receiver
Central power supply unit

Booster antenna

Dressing room

Safety curtain

Sound Cabin

Antenna cable

Antenna cable A Antenna cable B

4 x SR 4000

4 x SR 4000 PS 4000
4 x SR 4000 PS 4000 PS 4000

2 x SR 4000

22 channels

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24 channels

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WMS 4000 1-CHANNEL SETUP
EXAMPLE: 1-CHANNEL SYSTEM FOR SPECIFIC ARCHITECTURAL REQUIREMENTS
The devil is in the details is a saying that is very often true of wireless systems. Even if multichannel setups are no problem for the WMS 4000 thanks to frequency programs, Auto Setup etc., situations will arise where the greatest problem is not the number of channels but the correct design of a system with just one channel. Specific architectural conditions do not call for cutting-edge technology but rather for ingenious antenna positioning and the availability of small and helpful additional components required for a well-conceived system. In this example, we needed a single-channel wireless system for a three-story reinforcedconcrete building with an L- shaped plan. The task sounds simple: the transmitter must deliver a signal from any place on each floor. The only wqay to solve this problem is to use long antenna cable runs and booster antennas. The latter are simply suspended from the ceiling at the junction between the two wings of the L-shaped plan. It is essential to pay attention to the layout and the distances between the antennas. Antenna combiners connect the antenna cables from each floor to the receiver. However, the cable runs to the last floor are too long for the receiver to supply enough power to the booster antennas. This problem can be solved by inserting an ASU 4000 remote feeding adapter and power supply into each antenna cable. The ASU 4000 is available with AC power supplies for a variety of AC voltages. A simple, inconspicuous and cost efficient solution that minimizes the number of required components.

ASU 4000 Remote Power Supply compensates for power drain of long antenna cables The ASU 4000 is a small but ingenious accessory for extremely long antenna cable runs. It comes with a power supply for one of four AC voltage ranges that allos the device to used in virtually every country. The compact dimensions and the rugged, splash-proof metal case make it the first choice for open-air applications.
Specification: Amount 1x Item SR 4000 Description True diversity receiver
Hendheld or portable transmitter

ASU 4000

Remote powerd adapter for antennas

SR 4000

Description
a) Hardware The SR 4000 UHF receiver is one standard EIA rack unit high and one-half rack unit wide with a full metal chassis. Thus, two receivers can be placed side-by-side in one rack space (rack-mount hardware included). The SR 4000 has a 30 MHz wide UHF band containing presets with intermodulation-free frequencies as well as a tuning mode with access to up to 1,200 switchable frequencies. The SR 4000 utilizes operates as a true diversity receiver, in which two completely separate antenna, receiver and demodulator sections are operational at all times. The receiver includes a Pilot Tone Decoder Unit that decodes transmitter data out of the Pilot Tone's data stream. This enables the SR 4000 to show battery charge status and mute status of the transmitter on the integrated, back-lit color display. This data is also available at the Logic Output Connector on the rear panel. The HT4000 & PT4000s Pilot Tone allows automatic muting of the SRs audio output in case of invalid or corrupted signal (Tone Code Squelch TCSQ). If necessary this automatic squelch option can be overruled by a manual squelch setting. For PC control and monitoring of the SR unit a special data port is available on the rear panel of the SR 4000. The True Diversity receiver concept offers maximum dynamic range, greater freedom from interference and noiseless switching from one receiver to the other. Both balanced 3-pin XLR and unbalanced 1/4-inch output connectors are available. An output level switch allows the adjustment of 3 output levels (-30, 0, +6 dB) for optimum system gain structure. Also available on the rear panel are a data port connector, a logic output, 2 x BNC antenna Connectors and a lockable DC input jack. Controls on the SR 4000 include a backlit display and a Jog wheel to adjust various receiver settings such as squelch threshold, carrier frequency selection, user's name, scan & rehearsal mode selection and many more. Indicators on the unit include mute, audio level bargraph, RF level bargraph, 6x14 segment alphanumeric display and menu control. A unique, programmable Status Control Ring shows the most important system data at one glance. Each SR 4000 can accommodate a pair of diversity antennas; however, when a number of receivers are used in a single system, a master antenna pair (with or without antenna booster, directional and omnidirectional antennas) can be used to feed all receivers. A wide range of accessories such as an antenna splitter, antenna combiner and antenna booster are provided for operational flexibility and ease of installation. b) Software The internal software of the SR 4000 offers a wide range of control features for an easy setup even in complex multichannel systems under difficult rf conditions. Most helpful are features like AutoSetup (automatic intermodulation free channel selection), EnvironmentScan (scanning of the unit's RF range), and RehearsalMode (recording of important system data during rehearsal helps optimize the system setup). Important settings like frequency, squelch, unit name, etc. can be edited and stored via an easy menu structure. Even more control & monitoring features are available via the optional MCS 4000 (MissionControl Software) PC Control Software.
Features Wideband true-diversity frequencyagile UHF receiver with 1,200 channels and all-metal chassis Factory-selected, pre-matched frequency groups for quick system setup Backlit color LCD allows easy monitoring of operating parameters at a glance Jog wheel control allows quick, easy parameter adjustments AutoSetup, EnvironmentScan and Rehearsal Modes for quick, easy system setup Bodypack and handheld transmitters available with a wide selection of AKG microphones Up to 24 intermodulation-free frequencies per frequency group Wide range of optional accessories available for system customization

AutoSetup

RehearsalMode

EnvironmentScan

Battery Status / TX Mute

Specifications

SR 4000 Receiver
RF Carrier Frequency Ranges: 650 680, 680 710, 720 750, 760 790, 790 820, 835 - 863 MHz Carrier Frequencies: up to 1,200 per range (dependent on local conditions) Modulation Method: FM Rated Deviation: 20 kHz at 1 kHz (sine wave) Squelch Threshold: Adjustable between -70 and -100 dBm Audio Bandwidth: 3520,000 Hz THD at 1 kHz: < 0.3% at rated deviation Signal-to-noise: typ. 120 dBA Audio Output: Balanced 3-pin XLR-M, switchable from -30 to +6 dB; unbalanced 6.5 mm (1/4-in.) jack Current Consumption: 150 mA typical Power Requirement: 11 to 15 V dc or ac from external power supply Size: 7.8 x 7.4 x 1.7 in. (200 x 190 x 44 mm) Net Weight: 34 oz. (972 g)

Line Drawings

(us standard and metric measures)

0.7 inch (18 mm)

The wireless receiver shall operate over a 30 MHz UHF frequency range in one of 6 bands from 680 MHz to 863 MHz, with a wide range of possible frequency settings. The wireless microphone system shall incorporate factory-optimized sets of both sending and receiving frequency modules that are built into both transmitters and receivers. Each frequency set shall comprise a 30 MHz UHF band and offer up to 1,200 discrete operating frequencies within that band. The receiver shall operate on the true diversity principle, and the switching circuit shall be inaudible. Total harmonic distortion at 1 kHz for rated deviation shall be no greater than 0.3%. The receiver shall provide for a manual squelch adjustment as well as an automatic squelch option (tone code squelch) for optimum system operation. Audio output shall include a balanced XLR connector as well as an unbalanced 6.3 mm / 1/4-inch jack connectors. The output from the 3-pin XLR-type connector shall be adjustable in 3 steps (-30, 0, +6 dB). A data port for connecting a pccontrolled network and logic out connector shall be provided. The receiver shall be controlled by a jog wheel and shall provide a backlit color display as well as a programmable LED ring (red/green) showing the overall system status. The wireless receiver shall be the AKG Acoustics Model SR 4000.

7.8 inch (200 mm) 1.7 inch (44 mm)
AKG Acoustics GmbH Lembckgasse 2125, P.O.B. 158, A-1230 Vienna/AUSTRIA, Tel.: (+43 1) 86 654-0*, Fax: (+43 1) 86 654-7516, www.akg.com, e-mail: sales@akg.com Hotline: (+43 676) 83200 888, hotline@akg.com AKG Acoustics, U.S. 914 Airpark Center Drive, Nashville, TN 37217, U.S.A., Tel.: +1-615-620-3800, Fax: +1-615-520-3875, www.akgusa.com, e-mail: akgusa@harman.com For detailed information on WMS 4000 and other products from AKG contact your dealer or visit www.akg.com Specifications subject to change without notice. 02/04/Proa-Nr. 1453

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7.4 inch (190 mm)
Architects and Engineers Specifications