Lectrosonics UCR401 - Manual (Page 16)

UCR401
LECTROSONICS, INC. 16
Antenna Orientation
Two antennas are used in a polarity switching, combin-
ing technique called Smart Diversity TM to provide an
immunity to dropouts caused by RF multipath reflec-
tions. Signals from the transmitter arrive in a direct path
from the transmitter and from reflections from other
directions. To make full use of diversity reception, the
antenna whips need to be spaced apart.
The whips are made of woven stainless steel and can
be bent and shaped without damaging them. Shape
them so they curve slightly away from each other for
best reception.
In the diagrams below, the antenna patterns are simpli-
fied to help illustrate the effects of different orientations.
Receiver antennas are most sensitive perpendicular to
the whip, and transmitter antennas radiate maximum
power perpendicular to the whip. Reflected signals that
occur in normal use can also be useful, but they are not
easy to predict and generally not reliable.
Vertical orientation for
maximum range
Range is reduced if receiver
is horizontal, even though the
transmitter is vertical, or vice versa.
Range is significantly reduced
if receiver and transmitter
antennas are oriented
horizontally. In this case,
reflections may even be
stronger than direct signals.
Optimal
Marginal
Poor
Good
Bad