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

www.akg.com

Page 36
Image 36
AKG Acoustics WMS 4000 manual Troubleshooting Hints, Problem no sound microphone does not function, Problem poor audio

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.