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

WMS 4000

Antenna System Components

PS 4000 Multi-Coupler

AB 4000 Antenna Amplifier SRA 2B Active Directional Antenna
RA 4000 B Amplified Antenna ZAPD21/BNC Power Splitter
SRA 1 Passive Directional Antenna ASU 4000 Antenna Power Supply Unit

Description

The AKG Model WMS 4000 is an extremely flexible and sophisticated wireless microphone system for multi-user, multichannel applications. A wide range of accessories is available to customize the system to meet your specific needs and deliver tremendous operational flexibility and ease of installation. On the following pages, all the available components for setup of a sophisticated antenna distribution scheme for multi-channel systems are described.

Features

High quality RF components to build up extremely flexible and sophisticated antenna networks with large antenna cable lengths . and to build up distributed antenna networks for room sharing applications Cascadeable, PS 4000 Multi-Coupler Ultra linear Antenna Amplifier AB 4000 in waterproof housing High efficient passive and active directional antennas SRA 1 & SRA 2B Discreet omnidirectional Amplified Antenna RA 4000 B for indoor & outdoor use Wide range of useful accessories
The PS 4000 multi-coupler combines an antenna splitter and dc power distribution in a chassis that is one EIA standard rack unit high and one-half rack unit wide in a full metal housing. Thus, two multi-coupler units can be placed side by side (Rack Mount hardware kit included) or one PS 4000 side-by-side with e.g. an SR 4000 receiver unit. The PS 4000 has a wide-band antenna signal amplifier/divider with a 220 MHz-wide UHF bandwidth, making it suitable for all available WMS 4000 channels. The multi-coupler provides 2 BNC antenna inputs. The incoming diversity signal is internally amplified and divided to 4 pairs of diversity outputs, thus the splitter provides 2 x 4 BNC antenna output connectors. Two additional BNC outputs are available on the rear panel for cascading the diversity antenna signal to another multi-coupler. Up to 3 multi-couplers can be cascaded to supply antenna signal to 12 receivers from a single pair of antennas. The PS 4000 offers the following displays: one blue LED indicator for each antenna input showing that the connected cables, signal amplifier and antennas are fully operational. A red LED indicator will indicate a failure, like a short or loss of power. A 3 bit dip-switch for compensation of the connected cable length is available on the front panel to optimize the systems performance. On the rear panel of the PS 4000, a DC input can be hooked to either a single PSU 01/4000 or to the optional PSU 4000 central power supply unit, which can be connected to power the antenna splitter and the connected receivers and antennas remotely via the antenna cables.

Graphical Data

Specifications
Type: 2 x 1 to 4 SR4000 + 2 x 1 PS (Cascade) Carrier frequency range: 650 to 870 MHz Selectable input cable length compensation: +2, 0, -2, -4, -6, -8, -10, -12 RF inputs: 2 BNC sockets, 50 ohms RF outputs: 10 BNC sockets, 50 ohms Operating Power: 12 Vdc x 180mA unloaded Dimensions: 7.9 x 8.2 x 1.7 in. (200 x 207 x 43.8 mm) Weight: 38.3 oz. (1085 g) Standard accessories: RMU 4000 rack mounting kit Optional accessories: MK PS connecting BNC cable MKA 20 connecting BNC cable PSU 01/4000 power supply PSU 4000 power supply PS 4000
RA 4000 B Amplified Antenna
The RA 4000B is an active omnidirectional antenna. Designed for the WMS 4000 wireless microphone system, it comes with a specially-tuned wideband UHF amplifier, perfectly matched to all WMS 4000 channels. The integrated ultra linear RF amplifier circuit can be remotely powered by the PS 4000 antenna splitter and offers approximately 17 dB of amplification to compensate for the cable attenuation of up to 132 ft. (40 m) of RG58 cable or 328 ft. (100 m) of RG213 cable. If necessary, the RA 4000B can also be cascaded with the optional AB 4000 antenna amplifier to compensate for even more antenna cable length. The antenna provides a BNC connector for connecting a BNC antenna cable.

RA 4000 B

Carrier frequency range: 650 to 865 MHz Antenna Gain: 1dB Booster Gain: 17dB +/-1dB RF output: 1 BNC socket, 50 ohms Operating Power: 8 Vdc x 46mA Dimensions: 8.6 x 1.5 in. (220 x 38.5 mm) Weight: 2.3 oz. (65g) Standard accessories: SA 43 adapter Optional accessories: LMF1B flange mount w/screws LGN19B gooseneck

SRA 1 Passive Directional Antenna
The SRA1 is a passive UHF antenna with a hypercardioid polar pattern. The specific design of the antenna provides maximum onaxis gain of approximately 6 dB, which is equivalent to increasing the transmitters radiated power by four times. The antenna provides a BNC connector for connecting an antenna cable. Use only with MKA 5 or one 16.4 ft. (5 m) RG 58 cable.
Carrier frequency range: 650 to 945 MHz 2 pos. switchable Gain: 6 dB Coverage angle: 70 Front-to-back ratio (180): 13 dB min. Off-axis attenuation (90 to 110): 25 dB Dimensions: diameter: 5.98 in. (152 mm); depth: 2.5 in. (65 mm) Weight: 6.35 oz. (180 g) Standard accessories: SA 40 adapter
SRA 2B Active Directional Antenna
The SRA 2B is an active directional panel antenna. Specially designed for the WMS 4000 wireless microphone system, the SRA 2B comes with custom-tuned wideband UHF tuning, suitable for all WMS 4000 channels. The directional polar pattern offers approximately 70 of pickup with an on-axis amplification factor of approximately 6 dB. The integrated ultra-linear RF amplifier circuit could be powered by the PS 4000 multi-coupler and offers amplification of approx. 18 dB to compensate for cable attenuation of up to 40 m of RG58 cable or 100 m of RG213 cable. If necessary, the SRA 2B can be cascaded with the optional AB 4000 antenna amplifier for compensation of even greater antenna cable length. The antenna input utilizes BNC connectors for connecting the antenna cable*.
Carrier frequency range: 650 to 870 MHz Antenna gain: 6 dB Booster gain: 18 dB Coverage angle: 70 Operating Power: 8Vdc x 70mA Dimensions: 9.6 x 9.0 x 1.2 in. (243 x 230 x 30 mm) Weight: 7.8 oz. (220 g) Minimum length for RG 58 cable is 32.8 ft. (10 m) SRA 2B
ZAPD21/BNC Power Splitter
The ZAPD21/BNC power splitter is a passive device with an internal load dissipation of 0.125 watts and a matched power rating of 10 watts. It features BNC type connectors and may be used as a 1 to 2 splitter or as a 2 to 1 combiner. The ZAPD21/BNC passes DC voltage allowing active devices down stream to be remotely powered.
Port S to 1, 2 (and rev.) attenuation: -3.5 dB Dimensions: 2 x 2 x.75 in. (50.8 x 50.8 x 19.05 mm) Case material: Aluminum alloy Finish: grey ZAPD21/BNC

AB 4000 Antenna Amplifier
The AB 4000 is an in-line antenna signal amplifier used to compensate for the signal loss from cable attenuation in large antenna networks. The amplifier comes with an ultra-linear RF amplifier circuit that offers up to 17 dB of amplification and can be remotely powered by the PS 4000 or by an ASU 4000 Antenna Power Supply Unit. Each AB 4000 can be used with up to 40 m of RG 58 and up to 100 m of RG 213 cable. The AB 4000 comes with a 3 bit input amplifier for compensation of the connected cable length. The antenna booster also is equipped with 2 BNC connectors and 1 power indicator LED. The booster comes in a waterproof metal housing and therefore is even suitable for use outdoors.
Carrier frequency range: 650 to 870 MHz Switchable Gain: 17.5, 15.5, 13.5, 11.5, 9.5, 7.5, 5.5, 3.5 dB RF input: 1 BNC, 50 ohms RF output: 1 BNC, 50 ohms Operating Power: 8 Vdc x 75mA Dimensions: 3.1 x 2 x 2 in. (78 x 50 x 50 mm) Weight: 5.6 oz. (160 g) AB 4000
ASU 4000 Antenna Supply Unit
The ASU 4000 is an in-line power supply unit for use in large antenna networks to feed 8 V DC into an antenna line. With the help of the ASU 4000, all connected AKG antenna network components such as the AB 4000, SRA 2B and RA 4000B can be remotely powered even if there is no power coming from the connected PS4000 multi-coupler (e.g. in distributed antenna networks using standard antenna combiners). The ASU 4000 is equipped with 2 BNC connectors, 1 power indicator LED as well as a DC input for connection of the AC/120/500 adapter. The ASU 4000 is built into a waterproof metal housing and therefore is suitable for outdoor use. The ASU 4000 can power up to 6 active antenna components (e.g. AB 4000, RA 4000B, SRA 2B).
Carrier frequency range: 650 to 870 MHz RF input: 1 BNC, 50 ohms RF output: 1 BNC, 50 ohms Operating voltage: 12 Vdc Output Power: 8 Vdc x 500mA Dimensions: 3.1 x 2 x 2 in. (78 x 50 x 50 mm) Weight: 5.6 oz. (160 g) Optional accessories: AC12/500mA power supply ASU 4000

Limited Warranty

Valid only in the United States. AKG Acoustics warrants AKG products against defects in material or workmanship for a period of two years from the date of original purchase for use, and agrees to repair or, at our option, replace any defective unit without charge for either parts or labor. Important: This warranty does not cover damage resulting from accident, misuse or abuse, lack of reasonable care, the affixing of any attachment not provided with the product, loss of parts or connecting the product to any but the specified receptacles. This warranty is void unless service or repairs are performed by an authorized service center. No responsibility is assumed for any special, incidental

or consequential damages. However, the limitation of any right or remedy shall not be effective where such is prohibited or restricted by law. Simply take or ship your AKG product prepaid to our service department. Be sure to include your sales slip as proof of purchase date. (We will not repair transit damage under the no-charge terms of this warranty.) Note: No other warranty, written or oral is authorized by AKG Acoustics, Inc. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. Some states do not allow the exclusion or limitation of incidental or consequential damages or limitation on how long an implied warranty lasts, so the above exclusions and limitation may not apply to you.
Microphones Headphones Wireless Microphones Wireless Headphones Headsets Electroacoustical Components
AKG Acoustics GmbH Lembckgasse 2125, P.O.B. 158, A-1230 Vienna/AUSTRIA Tel: (43 1) 86 654-0*, Fax: (43 1) 86 654-516 Internet: http://www.akg.com AKG Acoustics Bodenseestrae 228, D-81243 Mnchen/GERMANY Tel: (089) 87 16-0, Fax: (089) 87 16-200 Arbiter Pro Audio Wilberforce Road, London NW9 6AX/ENGLAND Tel: (0181) 202 1199, Fax: (0181) AKG is constantly improving and modifying its products, therefore, specifications are subject to change without notice. AKG ACOUSTICS, U.S. 914 Airpark Center Drive Nashville, TN 37217, U.S.A. Tel: (615) 620-3800, Fax: (615) 620-3875 Japan ALL ACCESS INC. (Pro) No. 21, Sandanchi, Hongo, Jimokuji, Ama, 490-11 Aichi, www.allaccess.co.jp Cozy Hattori, Phone: +443 5537, Fax: +Erikson Pro Audio 620 McCaffrey, St-Laurent, Quebec, H4T 1N1, CANADA Tel: (514) 738-3000, Fax: (514) 737-5069 Internet: www.jam-ind.com/eriksonpro

Rev. 1/06 DS-WMS 4000