Lectrosonics UCR310 User Manual download pdf (Page 8)

DIRECT SIGNAL

RECEIVER

ANTENNA USE AND PLACEMENT

The receiver is supplied with two straight BNC antenna. In

some circumstances remote anteannas such as the SNA600 or

ALP700 may be useful for improving reception. Position

remote 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 posi-

tioning is much less critical. The antennas can also be

configured with one whip mounted directly onto the panel of

the UCR310 receiver, and the other one mounted remotely.

Be careful about the length of cabling from antenna to receiver.

Long cable runs can have serious signal loss. Lectrosonics has in-

line RF amplifiers suitable for compensating for long cable runs.

Contact your dealer of the factory for more information.

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 UHF drop-out normally sounds like a

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

even a few inches will change the sound of the hum or hiss, or

eliminate it. A drop-out situation may be either better or worse

as the crowd fills and/or leaves the room, or when the transmit-

ter or receiver is operated in a different location.

The UCR310 receiver offers a sophisticated diversity design

which overcomes drop-out problems in almost any situation. In

the event, however, that you do encounter a dropout 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 antenna 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 insignifi-

cant level. If, however, you do encounter drop-outs frequently, call

the factory or consult your dealer. There is probably a simple

solution.

REFLECTIVE SURFACE

DIRECT SIGNAL

INDIRECT SIGNAL

TRANSMITTER

PHASE

CANCELLATION

MULTI-PATH DROPOUT

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

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Lectrosonics UCR310 User Manual Page 8

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