Lectrosonics UCR205d User Manual download pdf (Page 8)

DIRECT SIGNAL

RECEIVER

DIRECT SIGNAL

INDIRECT SIGNAL

TRANSMITTER

PHASE

REFLECTIVE SURFACE

ANTENNA USE AND PLACEMENT

“hiss” or a “swishing” sound. Moving the transmitter even a

few inches will change the sound of the hum or hiss, or elimi-

nate it. A drop-out situation may be either better or worse as the

crowd fills and/or leaves the room, or when the transmitter or

receiver is operated in a different location.

The UCR205D receiver offers a sophisticated diversity design

which overcomes drop-out problems in almost any imaginable

situation. In the event, however, that you do encounter a drop-

out problem, first try moving the antenna at least 3 or 4 feet from

where it was. This may alleviate the drop-out problem on that

antenna. If drop-outs are still a problem, try moving the an-

tenna to an entirely different location in the room or moving the

antennas in closer to the transmitter location.

Lectrosonics transmitters radiate power very efficiently, and the

receivers are very sensitive. This reduces drop-outs to an insig-

nificant level. If, however, you do encounter drop-outs

frequently, call the factory or consult your dealer. There is

probably a simple solution.

There are two remote antenna assemblies included with this

receiver. Position the antennas at least three or four feet apart

and so that they are not within 3 or 4 feet of large metal surfaces.

If this is not possible, try to position the antennas so that they

are as far away from the metal surface as is practical. It is also

good to position the receiver so that there is a direct “line of

sight” between the transmitter and the receiver antenna. In

situations where the operating range is less than about 100 feet,

the antenna positioning is much less critical. The antennas can

also be configured with one whip mounted directly onto the

rear panel of the UCR205D receiver, and the other one mounted

remotely.

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 a cancellation may occur. The result

would 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 carrier and the sound when the transmitter is positioned in

certain locations in the room. A drop-out normally sounds like

CANCELLATION

MULTI-PATH DROPOUT

1 2 3 4 5 6 7 8 9 10 11 12 13 14

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Lectrosonics UCR205d User Manual Page 8

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