Instruction/ maintenance manual of the product WMS61 AKG
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WMS61 & & WMS81 W ireless Microphone Systems.
3 Figure 1. Basic principles of FM transmission and reception Introduction: The art and science of wireless microphone design have progressed in recent years to a point where reliable and flexible performance can be taken for granted in even the most complex venues.
4 FM has been used for broadcast transmission of high quality audio since the mid-1950s, and its primary advantages are wide audio bandwidth and relative freedom from external electrical disturbances as compared to AM (amplitude modulation).
5 Noise Considerations: Monophonic FM broadcast transmission normally has a very high signal-to-noise ratio because of relatively high signal strength and high modulation index.
Another technique for minimizing noise under marginal operating conditions is known as squelching . When the level of the incoming RF signal drops below a certain threshold, the system becomes prone to interference and may even pick up spurious signals.
7. Color coded rings (part number CCS-1): Included in the package is a set of color coded rings and matching rectangular snap-on color chips. These accessories help you keep track of which microphone corresponds to which receiver .
3. Mute indicator: When this red status light is on, the system is muted, indicating low or no RF signal from the transmitter . The squelch action operates with a pilot tone from the transmitter and requires no manual adjustment at the receiver .
T rying Out the System: A T ypical Setup: Now that you have been introduced to the basic functions of the WMS 61 and 81 units, let’ s proceed with a typical setup. W e’ll choose the bodypack and use it with a clip-on lapel microphone such as the AKG Model CK 77 WR-L.
Using Handheld T ransmitters: The same setup routine and precautions as we used for the bodypack apply here as well. Since a given handheld transmitter may be used by a number of speakers it is recommended that the initial checkout be made using the loudest of the speakers to ensure that the system can handle those maximum speech peaks.
11 Specifications PT61 bodypack transmitter: Audio bandwidth: 50 Hz to 20 kHz Modulation method: FM Radiated RF power: 10 mW Frequency stability: ±10 ppm Antenna: Flexible, quarter -wave wire Rated d.
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An important point after buying a device AKG WMS61 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought AKG WMS61 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data AKG WMS61 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, AKG WMS61 you will learn all the available features of the product, as well as information on its operation. The information that you get AKG WMS61 will certainly help you make a decision on the purchase.
If you already are a holder of AKG WMS61, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime AKG WMS61.
However, one of the most important roles played by the user manual is to help in solving problems with AKG WMS61. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device AKG WMS61 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
