Akg-acoustics WMS81 User Manual

WMS61 &&WMS81Wireless Microphone Systems

11SpecificationsPT61 bodypack transmitter:Audio bandwidth: 50 Hz to 20 kHzModulation method: FMRadiated RF power: 10 mWFrequency stability: ±10 ppmAnt

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3Figure 1. Basic principles of FM transmission and receptionIntroduction:The art and science of wireless microphone design have progressed in recent y

4FM has been used for broadcast transmission of high quality audio since the mid-1950s, and its primary advantages are wideaudio bandwidth and relativ

5Noise Considerations: Monophonic FM broadcast transmission normally has a very high signal-to-noise ratio because ofrelatively high signal strength a

Another technique for minimizing noise under marginal operating conditions is known as squelching. When the level ofthe incoming RF signal drops below

7. Color coded rings (part number CCS-1): Included in the package is a set of color coded rings and matching rectangularsnap-on color chips. These acc

3. Mute indicator: When this red status light is on, the system is muted, indicating low or no RF signal from thetransmitter. The squelch action opera

Trying Out the System: A Typical Setup:Now that you have been introduced to the basic functions of the WMS 61 and 81 units, let’s proceed with a typic

Using Handheld Transmitters: The same setup routine and precautions as we used for the bodypack apply here as well. Since a given handheldtransmitter