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AKG WMS 40 User Manual
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AKG WMS 40 User Manual

Akg user guide wireless microphone systems wms 40, wms 400, wms 4000
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WMS 40
WMS 400
Wireless
WMS 4000
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Summary of Contents for AKG WMS 40

  • Page 1 WMS 40 WMS 400 Wireless WMS 4000 Microphone Systems Everything you've always wanted to know about AKG WIRELESS TECHNOLOGY.
  • Page 3 WIRELESS TECHNOLOGY FOR THE FUTURE As more and more affordable wireless equipment became available, demand for high quality single and multi- channel wireless systems for sound com- panies, conference centers, public buil- dings, and live sound grew sharply, too. AKG responded to this trend early on, AKG Facts &...
  • Page 4 AKG HISTORY AKG - A LEGENDARY BRAND How it all started … A word to skeptics from the outset: the history of AKG is simply too good to have been just made up! 1945: In a setting reminiscent of “The Third Man”, two men who had occasionally done business with one another before World War II met up again.
  • Page 5 Introduction of the new "K Series" generation of headphones Alliance with Lectrosonics/USA for sound reinforcement products Alliance with Direct Research/Germany 1992 AKG acquires a 51% interest in its affiliate AKG Acoustics (India) Ltd. AKG acquires majority stake (79%) in Edge Technology Group/UK (Turbosound, Precision Devices, BSS Audio)
  • Page 6 AKG HISTORY AKG - A LEGENDARY BRAND The breakthrough At the beginning of the 1950s, the two ambitious founders of AKG achieved a break- through with completely revolutionary techno- logies. They applied for patents for their moving coil technology and the principle of the mass loaded diaphragm.
  • Page 7 Hearo 999 Audiosphere for the optimum surround sound listening experience 2000 C 3000 B receives M.I.P.A. 2000 (Musikmesse International Press Award) WMS 40: UHF system combining professional quality and exceptional cost efficiency Launch of C 4500 B-BC Broadcasting Condenser Microphone...
  • Page 8 AKG WMS BASICS HOW WIRELESS TECHNOLOGY WORKS The case for wireless mics The popularity of wireless systems is gro- wing continuously, and they are no longer found only at open-air events, in theaters, and conference centers. The increasing sel- ection of small portable wireless systems is the key to virtually unrestricted wireless free- dom even for amateur musicians and low- budget users, opening up a huge diversity of...
  • Page 9 fies it as necessary. An FM radio set – which everyone is familiar with – works on exactly the same principle. Now that we have seen that a wireless micro- phone system functions just like an FM radio station on a narrow bandwidth, we can also see that it is subject to exactly the same phy- sical laws that govern the propagation of radio waves.
  • Page 10 AKG has specified various radio frequencies for its WMS 40 wireless systems in order to ensure secure and reliable transmission in the UHF range, normally enabling four systems to be operated simultaneously. This...
  • Page 11 There is sufficient separation between them to ensure trouble-free operation and optimal signal quality. A maximum of four WMS 40 systems can be operated at any one time, and care must be taken to ensure that none of the...
  • Page 12 This calls for indi- vidual solutions, which is why AKG has crea- ted the WMS 40 series as a modular system that offers a wide range of solutions depen- ding on the user’s preferences and chosen field of application.
  • Page 13 The MP 40 micropen for presenters • Maximum flexibility of use as handheld, clip-on, or pocket mic • Superior-quality C 407 capsule • Optional quick charging station Page 20 Handheld microphone for presenters • Simple plug & play system • Time-tested AKG D 880 microphone element •...
  • Page 14 The design specification for the WMS 40 Series lists the best possible audio quality as the number one priority. The result explains the success of the WMS 40 system. This UHF Excellent response The HT 40 handheld transmitter uses the proven AKG D 880 microphone element.
  • Page 15 Holding the transmitter Be sure never to cover the lower half of the wire-mesh cap with your hand. If you do, the microphone element's polar pattern will change from cardioid to omnidirectional. In a concert hall, this change in the pickup pattern will signi- ficantly lower the usable gain before feedback.
  • Page 16 The C 420 L and C 444 L are cardioid microphones that focus their sensitivity at the user's mouth and reduce unwanted off- axis noise to a minimum. The AKG WMS 40 Mini XLR connector A locking 3-pin mini XLR connector pro- vides a reliable connection to a head- worn microphone from AKG.
  • Page 17 Antennas The swiveling antennas are mounted on the front panel, allowing the receiver to be rack mounted. ON/OFF switch with status LED. RF LED Illuminates to indicate that RF signal is being received. If the RF signal fails or the squelch comes on, the MUTE LED will be lit.
  • Page 18 AKG WMS UHF VOCALS AKG WMS 40 UHF FOR VOCALS SO 40 SNAPON TRANSMITTER CONVERTS Does this sound familiar? You've been using your favorite hardwire dynamic microphone for gigs and rehearsals for years and one night it turns out that for this particular gig it...
  • Page 19 XLR connector Plug it in. That's all you need to do to convert any hardwire dynamic mic to wireless. Obviously, you can use the SO 40 to add a radio link to any other audio source with an XLR output as well. The XLR connector on the SO 40 is wired for pin 2 hot (international standard).
  • Page 20 TAGE PPLICATIONS the same technology as AKG’s extremely suc- cessful WMS 40 range, which offers a genui- ne plug & play system for up to six channels. This ensures problem-free operation of all optional accessories – from receiver to char- ger –...
  • Page 21 D 3700 D 880 RF LEDs Illuminate to indicate a signal is being received. The mute LED lights up if the signal is lost or the squelch is active. Antennas The folding antennas are mounted on the front panel of the SR 40 diversity, making for easier rack installation.
  • Page 22 AKG WMS UHF PRESENTERS AKG WMS 40 UHF FOR PRESENTERS Designed for presentations, lectures, video shooting, and tour guide systems, the MP 40 micropen has been extremely popular for its versatility. Elegant and inconspicuous, it is small enough to fit in a jacket pocket.
  • Page 23 Put it in your pocket … … like a ballpoint pen. You can replace the colored clip with an inconspicuous black clip if necessary. For more products/hints for presenters, refer to the next page. Sets the volume level of the headphone out- Antennas The swiveling antennas can be set to any angle.
  • Page 24 AKG WMS UHF PRESENTERS AKG WMS 40 UHF FOR PRESENTER You can use a C 444 L head-worn or C 417 L lavalier microphone with a PT 40 bodypack transmitter with 35 hours battery life. The C 444 L has been optimized for speech pickup and rests securely yet gently against the user's cheekbone.
  • Page 25 Antenna The swiveling antenna is mounted on the front panel, allowing the receiver to be rack mounted. Case The side panel supports are removable for mounting the receiver in a 19" rack. Alternative receivers You can also use the PT 40 with the SR 40 diver- sity receiver or the PR 40 portable receiver.
  • Page 26 The WMS 40 Sports System is a complete solu- tion designed for the specific needs of ath- letes and trainers. The head-worn micro- phone affords maximum mobility.
  • Page 27 Sets the volume level of the headphone out- Antennas The swiveling antennas can be set to any angle. Alternative receivers You can also use the PT 40 with the SR 40 or SR 40 diversity receiver. Volume put. (See page 27 for details.) ON/OFF switch with status LED.
  • Page 28 Of course, all MicroMics will leave no trace on the instrument when you remove them. Using an AKG WMS 40 Bodypack System with AKG MicroMic Series microphones is an optimum solution for acoustic guitar, violin, banjo, zither, accordion, various wind instruments, and many other applica- tions.
  • Page 29 C 416 L instrument MicroMic To mic up an accordion, use two AKG C 416 L with a B 29L battery supply/mini mixer. For detailed hints on using MicroMics refer to pages 80/81. RF LEDs Illuminates to indicate that RF signal is being received.
  • Page 30 AKG WMS UHF GUITAR BASS AKG WMS 40 UHF FOR GUITAR & BASS Too long. Too short. Forgot it. Tied up in knots. Tangled up. Gone. Pins reversed. Disconnected. Broken. Must be hard to find a guitarist or bassist who never got furious about their cables and the related mess.
  • Page 31 Bottom panel charging contacts The charging contacts allow you to charge the batteries inside the PR 40 using the optional CU 40 charger. FlexJack for all portable keyboards The FlexJack connects to keyboard jacks. Use two WMS 40 systems for a stereo keyboard.
  • Page 32 Like most other wireless microphone systems, AKG WMS systems use frequency modulation. This involves changing (modulating) a carrier frequency in step with an audio signal (see also WMS 40, page 9). The electromagnetic wave spectrum The electromagnetic wave spectrum is becoming increasingly crowded by a wide variety of applications.
  • Page 33 WMS frequency band with TV transmitter If you are faced with interference caused by a television station, select the carrier frequency of the wireless microphone system such that there is a separation of at least 500 kHz from the video carier, and 200 kHz from the audio carrier. Caution: changing a single carrier frequency may result in chaotic intermodulation in the entire multichannel system! The Frequency Management Program from AKG provides a simple solu-tion to this problem as it automatically finds frequencies that wll not interfere with one another.
  • Page 34 This gives you time to correct any problems that may have arisen. ANAGEMENT NTERFERENCE radio equipment (see WMS 40 illustration on page 6/7). The interference from electrical appliances that cause electrosmog (such as computers and lighting equipment) can be par- ticularly disturbing during deep fades.
  • Page 35 Shadow loss: Shadow loss means that the signal path from the transmitter to the antenna is interrup- ted by an obstacle. Diversity systems help to eliminate transmission problems caused by shadow effects or multipath transmission. Non Diversity Wireless systems with a non-diversity receiver have to pro- cess the signal in whatever shape it reaches the antenna.

  • Page 36: Troubleshooting

    AKG WMS MULTICHANNEL TECHNOLOGY HOW MULTICHANNEL TECHNOLOGY WORKS Troubleshooting hardwire and wireless microphones 1. Problem: no sound (microphone does not function) Possible cause Hardwire mic Power supply Check whether … • phantom power on mixer is on • battery is o.k. (C 1000 S only) Cable/radio link Check whether …...
  • Page 37 THE WMS 400 MODULAR SYSTEM ODULAR The requirements of wireless systems vary from one user to another. Every user needs a Handheld microphone for lead and backing vocals • Handheld transmitter with D 880 dynamic or C 900 condenser element •...
  • Page 38 AKG WMS SR 400 UHF AKG WMS 400 RECEIVER IRST The SR 400 true diversity receiver is an optimal solution if you need a reasonably-priced, high- performance multichannel system. Based on the technology and experience of the revolutionary WMS 4000 wireless system, the SR 400 offers countless features that make setup and operation easier than ever before.
  • Page 39 Auto setup The receiver is automatically searching for clean fre- quencies, making system programming quick and easy. Infrared transmission The receiver is downloading frequency setup data to the transmitter. Antenna input socket Allow you to connect plug-in antennas, remote antennas, or even a complex antenna network.
  • Page 40 AKG WMS HT 400 UHF AKG WMS 400 TRANSMITTERS ANDHELD AND ODYPACK The HT 400 handheld and the PT 400 body- pack are high-performance, compact wireless transmitters that can be used for every con- ceivable application. Many innovative fea- tures not only ensure greater reliability of operation, but also provide extremely conve- nient operation.
  • Page 41 Microphones for PT 400 C 411 L C 416 L C 417 L C 419 L C 420 L For hints on how to use MicroMic Series products refer to pages 80 and 81. Flexible Antenna Maximum transmission reliability depends on a direct line of sight from the transmit- ter to the receiver.
  • Page 42 AKG WMS CU 400 THE AKG WMS 400 SERIES CHARGER Any wireless microphone system depends on sufficiently charged batteries in all the trans- mitters. There is nothing more embarrassing than a transmitter running out of juice in the middle of the show, or a voice fading as the transmitter battery dies.
  • Page 43 SRA 1 – Passive wideband dirctional antenna • For indoor and outdoor use, specifically for setting up long-range radio links • For use with short antenna cables up to 5 m (16 ft) long AB 4000 – Antenna booster • Ultralinear antenna booster with water-resistant case •...
  • Page 44 AKG WMS MULTICHANNEL TECHNOLOGY SETTING UP MULTICHANNEL SYSTEMS OW TO DEAL WITH Whenever two or more signals are transmit- ted by a non-ideal system, undesired inter- modulation products will be created, cau- sing distortions (see also WMS 400, p. 31). An ideal system would deliver an output signal that is identical to the input signal over the whole frequency range even at lar-...
  • Page 45 Microphone A carrier frequency Spectrum analyzer trace The received signal level declines in pro- portion to the square of the distance bet- ween transmitter and receiver, and the intermodulation level produced in the receiver declines in proportion to the third power of the received signal level.
  • Page 46 AKG WMS MULTICHANNEL TECHNOLOGY SETTING UP MULTICHANNEL SYSTEMS OW TO DEAL WITH Frequency Management: a good idea for any multichannel system One way to run a multichannel system would be to hire an RF engineer with a university degree for doing nothing but the number crunching required for finding clean frequencies and keeping an eye on all the batteries in the system.
  • Page 47 The far-near difference Unlike a hardwire microphone, even the best wireless system is susceptible to dropouts because the relative positions of persons and objects within the coverage area will change constantly during an event. At any moment, shadow loss and signal cancellation may coincide with intermodulation and sideband noise in such a way as to cause a dropout.
  • Page 48 AKG WMS MULTICHANNEL TECHNOLOGY SETTING UP MULTICHANNEL SYSTEMS ODULAR Calculating intermodulation-free radio fre- quencies requires an enormous amount of computing power. AKG used up to 150 computers operating day and night to cal- culate new sets of carrier frequencies Frequency bands Each of the six bands contains legal frequencies and pre- sets for reliable, intermodulation-free operation.
  • Page 49 HOW TO USE ANTENNAS Any radio system uses antennas to get a sig- nal from one place to another. To ensure the best possible signal quality, it is imperative to select the optimum antennas for the system and place the antennas correctly. Reflections, shadow loss, or deep fades may weaken or even cancel the radio signal (drop- out).
  • Page 50 AKG WMS ANTENNA TECHNOLOGY HOW TO USE ANTENNAS Cable attenuation setting vs. cable length in complex systems The CLA cable attenuation setting on the booster(s) and antenna splitter(s) depends on the frequency band, antenna type, cable type, cable length, and the position of the cable within the antenna line.
  • Page 51 Stadium example 2: Active directional antennas set up far from the stage, with their reflectors oriented to blank out interference sources. The antennas were positioned on a straight line from the interference source (e.g., a local TV transmitter)to the receiving antennas and stage center, several meters above the audience.
  • Page 52 AKG WMS 4000 OVERVIEW THE WMS 4000 MODULAR SYSTEM ODULAR The WMS 4000 is probably the most inno- vative professional wireless system available today. It is based on intensive R&D and has been thoroughly tested under real-life con- ditions before being released for produc- tion.
  • Page 53 HT 4000 • Wideband UHF handheld transmitter with interchange- able microphone elements and metal die-cast body • Preprogrammed factory presets • Up to 24 intermodulation-free frequency groups in each 30 MHz wide UHF band • Over 15 hours continuous operation on 2 AA size alkaline batteries or a minimum of 12 hours on optional BP 4000 battery pack CU 4000/BP 4000...
  • Page 54 The backlit display provides infor- mation on all important data, such as remai- ning battery life, carrier frequency, input Interchangeable microphone elements 100% AKG Acoustics: Tec Award winning C 900 Emotion D 880 , TRIPOWER D 3700 C 5900 , C 535.
  • Page 55 Microphones for HT 4000 D 880 WL 1 D 3700 WL 1 Microphones for PT 4000 LM 3 L C 411 L C 416 L C 417 L Detailed instructions on using MicroMic products see pp. 80/81. Rugged professional 3-pin mini XLR connector Connects all AKG microphones, such as the MicroMic series, CK 77 WR, Discreet Acoustics Modular lavalier module, etc.
  • Page 56 AKG WMS SR 4000 AKG WMS 4000 RECEIVER HE CUTTING The SR 4000 True Diversity Receiver offers maximum convenience with state-of-the-art technology and the widest range of functions in its class. Naturally, the SR 4000 is optimally equip- ped for the setup of large multichannel systems, so that connecting antenna split- ters, power supply units, computer networks, etc.

  • Page 57: Logic Out

    Auto Setup Automatic frequency setting and finding of free channels. Environment Scan Analyzes the RF environment for interference-free transmission. Rehearsal Mode Setup Assistant for the optimal setting of the system parameters. Battery life display Display of transmitter’s remaining battery life in hours. Professional XLR and jack outputs With output level selector.
  • Page 58 AKG WMS CU 4000 AKG WMS 4000 CHARGING SYSTEM HE INTELLIGENT The CU 4000 Charging Unit revolutionizes bat- tery management for wireless systems. The heart of the charging system is the BP 4000 Battery Pack with built-in active monitoring. An integrated microprocessor continuously moni- tors battery status and accurately calculates the remaining battery life.
  • Page 59 CU 4000 – Charging unit in a flight case Several charging units can be fitted into a rug- ged flight case as a compact solution for large systems. BP 4000 Intelligent quick-replacement battery pack Internal RAM Records charging/discharging processes and provides a database for optimizing charging parameters (Charge Balance Management).
  • Page 60 AKG WMS PS 4000 AKG WMS 4000 ANTENNA SPLITTER NDESPENSABLE One or several PS 4000 antenna splitters can be used to set up complex systems with long antenna cables, distributed antenna networks for room sharing applications, or to feed the signal from a single antenna pair to several receivers.
  • Page 61 Selecting antenna cables Antenna cables are needed for feeding the signal of a remote anten- na to the receiver. However, all antenna cables attenuate the anten- na signal (cable attenuation). Since different types of cables have different attenuation values, each type will perform best at a dif- ferent length.
  • Page 62 AKG WMS 4000 ANTENNAS AKG WMS 4000 ANTENNAS/ACCESSORIES With its antennas and optional accessories spe- cially “tailored” to the WMS 4000 System, AKG offers the optimum solution to any type of application, allowing users to implement even the most complex antenna networks easily and efficiently.
  • Page 63 SRA 1 – Passive wideband directional antenna • For indoor and outdoor use, in particular for setting up long-range radio links • For use with short antenna cables up to 5 m (16 feet) long • Water-resistant design with BNC output SRA 2B –...
  • Page 64 AKG WMS HUB 4000 AKG WMS 4000 NETWORK CONCENTRATOR INK BETWEEN THE The HUB 4000 is the intelligent hardware interface between a WMS 4000 wireless system and one (or several) PCs. No more need for cumbersome cabling; the HUB 4000 concentrates the data flow of up to eight recei- vers and connects easily to any PC with an Ethernet interface.
  • Page 65 AKG WMS 4000 MISSION CONTROL SOFTWARE The MCS 4000 Mission Control Software allo- ws you to display the entire setup of a WMS system on screen and to edit all settings sim- ply by mouse click. All relevant data, such as RF level, audio level, diversity activity, battery status of the transmitters, Mute/Off etc.
  • Page 66 AKG WMS PSU 4000 AKG WMS 4000 POWER SUPPLY ELIABLE OWER The PSU 4000 is a central power supply unit for all components of the WMS 4000 system. A stable, interference-free voltage (15 V/2 A or 15 V/2.5 A respectively) at three outputs ensures a stable network.
  • Page 67 AKG WMS 4000 HEADPHONE AMPLIFIER Integrating an HPA headphone amplifier into the WMS 4000 system makes life a lot easier for the FOH engineer. During the performance, the audio output signals of each receiver can be monitored directly, without having to HPA 4000 Headphone amplifier On/off switch Headphone jack...
  • Page 68 AKG WMS PRACTICAL EXAMPLES WMS 4000 8-CHANNEL SETUP : 8-C XAMPLE HANNEL Wireless systems are becoming increasingly popular for conference centers and seminar hotels. Unlike open-air events and large-scale performance facilities, the main focus here is not on coverage or the optimal utilization of as many channels as possible, but maximum fle- xibility.
  • Page 69 Power cable Antenna cable A Antenna cable B 2 x RA 4000 B Room 1 PSU 4000 CU 4000 AKG WMS PRACTICAL EXAMPLES 2 x RA 4000 B Room 2 Room 3 Antenna booster Antenna booster ZAPD 21 ZAPD 21 8 x SR 4000 www.akg.com 2 x RA 4000 B...
  • Page 70 AKG WMS PRACTICAL EXAMPLES WMS 4000 10-CHANNEL SETUP XAMPLE 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 al- terations or soundchecks.
  • Page 71 AKG WMS PRACTICAL EXAMPLES www.akg.com...
  • Page 72 AKG WMS PRACTICAL EXAMPLES WMS 4000 16-CHANNEL SETUP XAMPLE Although most venues are equipped with fixed wireless installations, special perfor- mances frequently require specific mobile systems. The reasons for this may vary, but the basic requirements are the same: a high- performance wireless system in a portable rack, whose audio signals can be fed to the local system simply through a multicore...
  • Page 73 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). Gala Musical Couples, August 2003 This performance was scheduled at short notice and therefore needed a high-performance mobile wireless system.
  • Page 74 AKG WMS PRACTICAL EXAMPLES WMS 4000 16-CHANNEL SETUP : 16-C XAMPLE HANNEL YSTEM FOR OBILE www.akg.com...
  • Page 75 AKG WMS PRACTICAL EXAMPLES www.akg.com...
  • Page 76 AKG WMS PRACTICAL EXAMPLES WMS 4000 46-CHANNEL SETUP XAMPLE As regards planning, technology, and monito- ring, wireless installations in opera houses pose a particular challenge. Unfailingly high sound quality and "invisible" installation of the com- ponents are basic requirements for offering the audience a unique auditory experience.
  • Page 77 AKG WMS PRACTICAL EXAMPLES Stage Dressing room 2 x RA 4000 B Safety curtain 70 m SRA 2B SRA 2B Sound Cabin ZAPD 21 ZAPD 21 Antenna cable www.akg.com...
  • Page 78 AKG WMS PRACTICAL EXAMPLES WMS 4000 46-CHANNEL SETUP : 46-C XAMPLE HANNEL YSTEM FOR AN PERA OUSE Antenna cable A Antenna cable B ZAPD 21 PS 4000 PS 4000 PS 4000 4 x SR 4000 4 x SR 4000 4 x SR 4000 PS 4000 PS 4000 PS 4000...
  • Page 79 AKG WMS PRACTICAL EXAMPLES ZAPD 21 PS 4000 PS 4000 PS 4000 4 x SR 4000 4 x SR 4000 4 x SR 4000 PS 4000 PS 4000 PS 4000 4 x SR 4000 4 x SR 4000 4 x SR 4000 24 channels www.akg.com...
  • Page 80 AKG WMS PRACTICAL EXAMPLES WMS 4000 1-CHANNEL SETUP : 1- XAMPLE CHANNEL “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...
  • Page 81 AKG WMS PRACTICAL EXAMPLES www.akg.com...
  • Page 82 AKG WMS FOR INSTRUMENTS AKG MICRO MICS FOR INSTRUMENTS – S OW TO PLACE WIRELESS ICKUPS ON PORTABLE NSTRUMENTS OME USEFUL INTS Guitar: You may need to try around for the best spot to attach the C 411 L to your guitar. Attaching the microphone on or near the bridge will usually give an excellent sound.
  • Page 83 AKG WMS FOR INSTRUMENTS Saxophone: Clip the C 419 L or D 409 on to the bell of the saxophone, align it with the edge and listen to the sound to identify the best position. For subtone playing, turn the microphone toward the center of the bell (marked wind noise!).

  • Page 84: Application Guide

    AKG WMS OVERVIEW APPLICATION GUIDE ECOMMENDED Application AV/sound company Bars and clubs Sound systems (shopping malls, universities, etc.) Meeting and social rooms Fitness centers and recreational facilities Hotels Karaoke Places of worship Conference rooms Conference centers Live sound Multipurpose halls Open-air sound systems (sports events, etc.) Presentations...
  • Page 85 AKG WMS OVERVIEW AKG W Receiver PR 40 Diversity Backlit display Diversity indicators RF/audio level LED RF/audio bargraphs w/peak hold Mute LED Peak LED Programmable status display Adjustable squelch Tone code squelch Selectable frequencies Integrated country-coded frequency database Frequency presets Max.

  • Page 86: Specifications

    AKG WMS OVERVIEW SPECIFICATIONS System SR 40 SR 40 diversity Carrier frequency band: 710-865 MHz 710-865 MHz Modulation: Audio bandwidth: 40-20.000 Hz 40-20.000 Hz typ. 0,8% typ. 0,8% (1 kHz/rated deviation): typ. 103 dB typ. 103 dB (A-weighted): Power requirement: 120/230 V AC, 50/60 Hz, 120/230 V AC, 50/60 Hz, 95±15 mA...
  • Page 87 SPECIFICATIONS TM 40 PR 40 diversity SR 400 710-865 MHz 710-865 MHz 650-680, 680-710, 720-750, 760-790, 790-820 and 835-863 MHz 40-20.000 Hz 40-20.000 Hz 35-20.000 Hz typ. 0,8% typ. 0,8% typ. <0,3% typ. 103 dB typ. 103 dB typ. >120 dB 1 x 1,5 V AAA size battery 2 x 1,5 V AAA size batteries –...
  • Page 88 AKG WMS GLOSSARY Antenna Cable Cable specifically designed for RF signals. Used for connecting a remote antenna to a receiver. Antenna cables are typically coaxi- al and symmetrical. Signal attenuation de- pends on the frequency band of the signal as well as the length and quality of the cable and is quoted for a 100-m run of cable.
  • Page 89 Inside a bass 140 dB drum 3 cm Loud vocals, (one inch) measured in from the head front of the 130 dB mouth; Tom-toms threshold of 3 cm (one in.) pain distance; 120 dB 60 watt guitar Congas, 2 cm amp, at 30 cm (one in.) from (12 in.)
  • Page 90 AKG WMS GLOSSARY Feedback When a microphone picks up amplified sound from a loudspeaker this signal will be reamplified, picked up again, etc., until the commonly known shrill howling (some- times a lower midrange rumbling) sets in. In small rooms, feedback is usually caused by reflections.
  • Page 91 Hypercardioid Ultra-directional Figure- eight Omni- directional Cardioid GLOSSARY EFINITIONS FROM cates its sensitivity to sounds arriving from different directions. Omnidirectional micro- phones “hear” equally well in all directions while all others prefer sound from one (unidirectional) or two (bidirectional) direc- tions.
  • Page 92 AKG WMS GLOSSARY This effect, known as “proximity effect”, begins to become audible at a few hundred Hz and at extremely close working distances, the output level may be up to 15 dB higher at 50 Hz than at 1 kHz. This corresponds to about 6 times the normal output voltage.
  • Page 93 Term Angle of sound incidence Antenna placement Automatic frequency search Automatic frequency setup Bandwidth Battery care Cable attenuation Cable length Carrier frequency Carrier signal Characteristic Close-in miking Deep fade Dropout Dual antenna diversity Electromagnetic waves/Electromagnetic wave spectrum Electrosmog Environment Scan Far-near difference Feedback Frequency band...
  • Page 94 AKG WMS NOTES APPENDIX OTES www.akg.com...
  • Page 95 AKG WMS NOTES APPENDIX OTES www.akg.com...
  • Page 96 AKG WMS NOTES APPENDIX OTES www.akg.com...
  • Page 97 AKG WMS NOTES APPENDIX OTES www.akg.com...
  • Page 98 AKG WMS NOTES APPENDIX OTES www.akg.com...
  • Page 100 Microphones · Headphones · Wireless Microphones · Wireless Headphones · Headsets · Electroacoustical Components AKG Acoustics GmbH Lemböckgasse 21–25, 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...

This manual is also suitable for:

Wms 400Wms 4000