Lectrosonics UCR401 User Manual download pdf (Page 16)

UCR401

LECTROSONICS, INC.

Antenna Orientation

Two antennas are used in a polarity switching, combin-

ing technique called Smart Diversity

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

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 27 28

No comments

Lectrosonics UCR401 User Manual Page 16