Lectrosonics CR170 User Manual download pdf (Page 6)

ANTENNA USE AND PLACEMENT

Connect the antenna to the rear panel jack. Extend the antenna fully. Position the antenna so that it is not

touching or within 3 or 4 feet of large metal surfaces. It is also good practice to position the receiver so that there

is a direct "line of sight" between the transmitter and the receiver antenna.

A wireless transmitter sends a radio signal out in all directions. This signal will often bounce off nearby walls,

ceilings, etc. and a strong reflection can arrive at the receiver antenna along with the direct signal. If the direct and

reflected signals are out of phase with each other, as depicted in the figure below, a partial or complete cancellation

of the received signal will occur. The result will be a "drop out." A drop out sounds like either audible noise (hiss),

or in severe cases, may result in a complete loss of the sound when the transmitter is positioned in certain

locations in the room. Moving the transmitter even a few inches may change the sound of the hum or hiss, or

eliminate it. A dropout situation may become either better or worse as the crowd fills or leaves the room.

In the event that you do encounter a dropout problem, first try moving the receiver/antenna at least 3 or 4 feet from

where it was. This may alleviate the dropout problem. If dropouts are still a problem, try moving the receiver

and/or the antenna to an entirely different location in the room.

Lectrosonics transmitters radiate more power, and the receivers are more sensitive than others on the market.

These design improvements generally reduce dropouts to an insignificant level. If, however, you do encounter

dropouts frequently, call the factory. There is probably a simple solution to the problem.

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Lectrosonics CR170 User Manual Page 6