AKG Acoustics WMS 4000 manual Troubleshooting Hints, Problem no sound microphone does not function

Page 36

AKG WMS MULTICHANNEL TECHNOLOGY

HOW MULTICHANNEL TECHNOLOGY WORKS

TROUBLESHOOTING HINTS

Troubleshooting hardwire and wireless microphones

1. Problem: no sound (microphone does not function)

 

 

 

Possible cause

 

Hardwire mic

 

Wireless system

 

Remedy (hardwire mic)

 

Remedy (wireless system)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power supply

 

Check whether …

 

Check whether …

 

> Switch phantom power on or replace

 

> Switch power to receiver and

 

 

 

 

 

 

 

• phantom power on mixer is on

 

• power to receiver and transmitter is

 

battery

 

transmitter on or replace batteries

 

 

 

 

 

 

 

• battery is o.k. (C 1000 S only)

 

on and batteries are o.k.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cable/radio link

 

Check whether …

 

Check whether …

 

> Connect cable

 

 

 

 

 

 

 

 

 

 

 

 

• both cable ends are connected

 

• transmitter (mic) and receiver

 

 

 

 

> Set same frequency on transmitter

 

 

 

 

 

 

 

 

 

 

are set to same frequency

 

 

 

 

and receiver

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Signal path

 

Check whether …

 

Check whether …

 

> Open mic channel, set gain to

 

 

 

 

 

 

 

 

 

 

 

 

• mic channel is open, mute and

 

• transmitter signal reaches receiver

 

drive input correctly

 

> Open mic channel, set gain to drive

 

 

 

 

 

 

 

preattenuation switches are out, and

 

 

 

 

 

 

 

input correctly, set receiver squelch

 

 

 

 

 

 

 

gain is set correctly on mixer

 

 

 

 

 

 

 

threshold to minimum

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2. Problem: poor audio

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Possible cause

 

 

Hardwire mic

 

 

Wireless system

 

 

Remedy (hardwire mic)

 

 

Remedy (wireless system)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Weak signal

 

 

Check whether …

 

 

Check whether …

 

 

> Clean contacts (use contact spray)

 

 

> Reduce distance between

 

 

 

 

 

 

 

 

• corroded contacts, dry solder joints

 

 

• transmitter is out of range

 

 

 

 

 

transmitter and receiver

 

 

 

 

 

 

 

 

cause excessive attenuation

 

 

• signal is attenuated by objects

 

 

 

 

 

> Reposition transmitter/receiver

 

 

 

 

 

 

 

 

 

 

 

or people

 

 

 

 

 

(especially antennas)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

> Use active (directional) antennas

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

> Use booster(s)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Hum, whistle, or

 

 

Check whether …

 

 

Check whether …

 

 

> Change cable routing

 

 

> Select other frequencies

 

 

 

 

other noise

 

 

• stray magnetic fields induce hum in

 

 

• there is intermodulation or

 

 

> Eliminate interference sources

 

 

> Switch off unwanted transmitter

 

 

 

 

 

 

 

 

cables (crosstalk from parallel

 

 

interference (spectrum analyzer)

 

 

> Keep away from RF sources

 

 

(if possible) or increase distance

 

 

 

 

 

 

 

 

lines), or ground loops, monitors,

 

 

• signal is jammed by unwanted high-

 

 

 

 

 

from interference source

 

 

 

 

 

 

 

 

fluorescent lighting, or transformers

 

 

power transmitters (TV/radio station)

 

 

 

 

 

> Keep away from interference sources

 

 

 

 

 

 

 

 

degrade the signal

 

 

• there are any sources of interferen-

 

 

 

 

 

> Reduce RF output

 

 

 

 

 

 

 

 

 

 

 

ces (computers, lighting, switching

 

 

 

 

 

> Keep transmitter at least 2 feet

 

 

 

 

 

 

 

 

 

 

 

power supplies)

 

 

 

 

 

(1/2 m) away from metal fabric

 

 

 

 

 

 

 

 

 

 

 

• RF output causes is too high/low

 

 

 

 

 

and loose coins

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3. Problem: signal quality deteriorates on movement

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Possible cause

 

 

Hardwire mic

 

 

Wireless system

 

 

Remedy (hardwire mic)

 

 

Remedy (wireless system)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Dropout or

 

 

Check whether …

 

 

Check whether …

 

 

> Fix cable strain relief

 

 

> Reposition transmitter/receiver

 

 

 

 

deep fade

 

 

• cable was accidentally disconnected

 

 

• transmitter is out of range

 

 

 

 

 

(especially antennas)

 

 

 

 

 

 

 

 

 

 

 

• signal is attenuated by objects

 

 

 

 

 

> Use active (directional) antennas

 

 

 

 

 

 

 

 

 

 

 

or people

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• there is a permanent line of sight

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

between transmitter and receiving

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

antennas

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Extremely

 

 

Check whether …

 

 

Check whether …

 

 

> Repair solder joints and/or equip-

 

 

> Switch off unwanted transmitter

 

 

 

 

inconsistent

 

 

• any contacts are loose

 

 

• transmitter is out of range

 

 

ment

 

 

or increase distance from source

 

 

 

 

signal quality

 

 

• there are any dry solder joints

 

 

• signal is attenuated by objects

 

 

 

 

 

of interference

 

 

 

 

 

 

 

 

• microphone and/or cable is

 

 

or people

 

 

 

 

 

> Select clean frequencies

 

 

 

 

 

 

 

 

mechanically damaged

 

 

• there are any unwanted local

 

 

 

 

 

> Reposition receiving antennas

 

 

 

 

 

 

 

 

 

 

 

transmitters (e.g. intercom)

 

 

 

 

 

> Use active (directional) antennas

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

> Use booster(s)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

34

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Contents Wireless Page Wireless Technology for the Future Pioneer in Acoustics for Over 50 YearsHow it all started … Die DYN Series120 DYN Founders Dr. Rudolf Görike and Ing. Ernst Pless12 a 180Early products Company nameBreakthrough Expansion coursePeter Wolf Rock me AmadeusAKG expands its activities in the wireless market Turning pointWMS New research centerHOW Radio Signals are Transmitted Case for wireless micsJust like a radio set Radio waves instead of cablesSignal propagation Positioning the receiverRule no WavelengthBandwidth Frequency Modulation FMInterference Example of AKG WMS 40 carrier frequenciesModular Solutions to Meet Individual Requirements Clip-on or head-worn microphone For presentersHead-worn microphone for extreme Activities like aerobics and sportsHandheld Mics for Lead and Backing Vocals On/off switch VolumeMicrophone cleaning and maintenance Angle of incidencePT 40 Portable transmitter Mini XLR connector Rear panel and battery compartmentHEAD-WORN Mics for Lead and Backing Vocals Flexible antennaSR 40 diversity Receiver ON/OFF switch AntennasAF LEDs Alternative receivers Diversity LEDsBattery compartment XLR connectorSO 40 snapon transmitter Release button Color codeXLR connector pin 2 hot Setting the squelch thresholdBattery charging made easy TM 40 Transmitter module Status LEDWireless and supremely flexible On/Off switch AF LEDs3700M 3800M 880MMP 40 Micropen for Presenters Cable compartmentMicrophone Color code pen clipMP 40 micropen in handheld mode PR 40 Portable receiver ON/OFF switchDetachable microphone Put it in your pocket …More Goodies for Presenters PT 40 Bodypack transmitterWith C 444 L head-worn or C 417 L lavalier microphone With proven D 880M microphone element444 L 417 LAvoiding feedback Wireless Systems for Maximum Mobility Training communicationsPR 40 Portable receiver PT 40 careAKG WMS 40 UHF for Instruments Radio Links for Portable InstrumentsConnecting to microphone or line inputs MicroMic C 411 L pickupInstrument MicroMics Instrument MicroMic Instrument MicroMicsAccessories GB 40 Guitarbug for Guitar and BassJack plug Guitar system in a bag FlexJack for all electric guitar modelsFlexJack for all electric bass models HOW Multichannel Technology Works WMS frequency band with TV transmitter IntermodulationUse before each performance Automatic frequency setup Shadow loss Multipath transmissionTroubleshooting Hints Problem no sound microphone does not functionProblem poor audio Modular Solutions for Custom Reqirements SR 400 Receiver On/Off switch Recessed level control Status LEDsBacklit LC display Metal caseAuto setup Rehearsal modeRange of accessories for complex applications Infrared transmissionOn-Mute/Program-Off switch Extremely rugged spring steel mesh grillInfrared sensor HT 400 Handheld transmitter DisplayRugged mini XLR connector Jack for external mute switchBattery status display Frequency preset LCD display Frequency in MHz Low battery capacity warningInput jack for a local or central power supply e.g., PSU User Friendly Quick ChargerLocking DC jack Integrated charging contacts for direct chargingPSU 4000 Central power supply unit AB 4000 Antenna boosterRA 4000 B Omnidirectional wideband booster antenna HPA 4000 Headphone amplifierSetting UP Multichannel Systems IP 3 InterceptMicrophone a carrier frequency Spectrum analyzer traceFrequencies Frequency Management a good idea for any multichannel system Here is a proven way to add clean frequencies Far-near differenceStage a Stage B Band I + 0,15Modular Solutions for Professional Requirements SELECTING, Placing and Using Antennas Signal loss caused by the audienceSkin Fat Muscle CartilageSELECTING, PLACING, and Using Antennas Cable position a Cable position BCable type Impedance GageStadium example Stadium theater, opera house exampleShort antenna cable runs Drawbacks Speech Vocals Guitar/Bass Instruments Live soundTV studio Theater CU 4000/BP HUB 4000 Network concentrator SRA 1 Passive wideband dirctional antennaRA 4000 B Battery status readout Frequency presetsAutomatic gain setting Battery compartment Jog switchJack for remote Mute switch Silent Mode settingInscribable color code element Magnesium body Hidden pilot toneCUTTING-EDGE True Diversity Receiver Backlit display Half-rack 19 all-metal caseProgrammable status display SR 4000 ReceiverBattery life display Environment Scan and Rehearsal ModeEnvironment Scan Professional XLR and jack outputsIntelligent WAY to Power WMS 4000 Transmitters Charging status display LED Recovery key and LEDCU 4000 Charging unit Lockable DC jack Such as a PSUIntegrated temperature sensor CU 4000 Charging unit in a flight caseInternal RAM Data interface to transmitter electronicsBNC antenna outputs BNC antenna inputsDaisy-chaining outputs AKG WMS PS Antennas Tailored to Every Situation Cabling example/cable lengthsSelecting and placing antennas ASU 4000 Remote powerd adapter for antennas SRA 1 Passive wideband directional antennaSRA 2B Active wideband directional antenna ZAPD-21 Antenna combinerStandard PC accessories. This allows you to Link Between the WMS 4000 and a PC NetworkAs RF levels on site. This makes it incredibly Example WMS 4000/PC networkYou can even set up the basic parameters Get a Cup Setup Mode Moving PC Rehearsal ModeYour Computer AS a WMS 4000 Control Center Ensures maximum operating reliabilityAKG WMS 4000 Power Supply Recommended headphones Monitoring Without a MixerLine input jacks, DC input lockable Jog control StudioSpecification Amount Description SeminarsRA 4000 B PSUExample 10-CHANNEL System for Tour Sound Tour SoundAmount Description AKG WMS Practical Examples Example 16-CHANNEL System for Mobile USE Vienna KonzerthausWMS 4000 Wiring WMS 4000 mobile rackGala Musical Couples, August Detailed system layout is shown on the following pagesWMS 4000 16-CHANNEL Setup AKG WMS Practical Examples Example 46-CHANNEL System for AN Opera House High-tech for pure enjoymentStage Channels Channels WMS 4000 1-CHANNEL Setup SpecificationAKG WMS Practical Examples Guitar Violin and violaBanjo See guitar. top rightSaxophone ClarinetTubas TromboneAV/sound company Bars and clubsSound systems Meeting and social roomsAKG Wireless Systems AT a Glance Microtools HT/PTALL the Specs AT a Glance SystemMP 40 micropen PR 40 diversity Mounting kit, 2 antennasDefinitions from a to Z Electromagnetic Wave Spectrum Distortion EnvironmentDirectional Antenna DiversityPhantom Power FeedbackFrequency Management Frequency ModulationHypercardioid Ultra-directional CardioidPop Noise Pressure Gradient MicrophoneSignal Loss Signal-to-noise S/N RatioReflection Remote AntennaIndex Selected KeywordsAppendix Appendix Appendix Appendix Appendix Page AKG ACOUSTICS, U.S
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WMS 40, WMS 400, WMS 4000 specifications

AKG Acoustics has long been recognized as a premier brand in the professional audio industry, particularly in the realm of wireless microphone systems. Among its celebrated offerings, the WMS 4000, WMS 400, and WMS 40 series stand out for their advanced technology and robust performance, catering to a range of applications from live performances to studio recordings.

Starting with the WMS 4000, this system is engineered for versatility and reliability. It features a sophisticated transmission diversity system that minimizes dropouts and ensures clear audio quality. The WMS 4000 offers an extensive frequency range, accommodating diverse environments and frequencies. A standout feature is its digital pilot tone, which automatically mutes the transmitter when it is switched off, effectively preventing unwanted noise during transitions. With a range of up to 300 meters, the WMS 4000 is ideal for large venues, allowing performers ample space to move without compromising sound quality.

Next, the WMS 400 series maintains the high standards set by its predecessor while providing a more accessible option for mid-level performers. It combines ease of use with quality audio performance, boasting a user-friendly interface that simplifies setup and operation. The WMS 400 employs an efficient frequency management system, which automatically scans the environment to select the best frequencies available, ensuring optimal performance with minimal interference. The system also features a rugged metal chassis, enhancing durability for live applications.

The WMS 40 series serves as an entry-level solution, perfect for beginners and small venues. It is lightweight and features a straightforward design, making it easy to operate for users without extensive technical knowledge. One of its most notable characteristics is its plug-and-play functionality, allowing for quick setup without complicated configurations. The WMS 40 series also offers excellent sound quality through its crystal-clear audio transmission and robust reception, making it a popular choice for schools, theaters, and small events.

All of these systems benefit from AKG's heritage in sound engineering, incorporating advanced audio processing technologies that ensure superior sound fidelity. They also come with a variety of microphone options, including handheld, lavalier, and headworn microphones, providing flexibility to meet different performance needs. Whether for a professional stage or an intimate setting, the AKG WMS series delivers outstanding performance, reliability, and user-friendly features that cater to a wide range of audio applications.