Lectrosonics UCR201 - Manual (Page 11)

UHF Wireless Diversity Receiver
ANTENNA USE AND PLACEMENT
The receiver is supplied with two fixed antennas. It is
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.
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 audible noise (hiss or
swishing), or in severe cases when the transmitter is
positioned in certain locations in the room, it may result
in complete loss of the carrier and the sound. Moving
the receiver even a few inches will change the drop-out
sound, or eliminate it completely. A drop-out situation
may also improve or deteriorate as the crowd fills or
empties the room, or when the transmitter or receiver is
moved to a different location.
The UCR201 receiver offers a sophisticated diversity
design which overcomes drop-out problems in almost
any situation. However, in the event that you do
encounter a drop-out problem, first try moving the
receiver at least 3-to-4 feet from where it original
location. This may alleviate the drop-out problem at that
location. If drop-outs still exist, try moving the receiver to
an entirely different location in the room or closer to the
transmitter location.
Lectrosonics transmitters radiate power very efficiently,
and the receivers are very sensitive. This reduces drop­
outs to an insignificant 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
INDIRECT SIGNAL
TRANSMITTER
PHASE
CANCELLATION
MULTI-PATH DROPOUT
Rio Rancho, NM – USA 11