8
When possible, place the base station in an elevated position, say 1.5-2 meter from floor.
When installed on a rack, choose the upper one position in order to have the antennas radiating in
free space and avoiding interferences with another unit.
It is not absolutely necessary to mount the rear antennas as they are used for base station
diversity and the beltpack incorporates its own dual antenna diversity system.
In order to increment the operating range of the system, place the supplied antennas in an
upper position by using the recommended support accessory, or by using high gain accessory
antennas. Consult the accessories section for more information about this.
PROGRAM INPUT CONNECTION
The intercom base station program input signal is carried out through a XLR-3-31 female
connector. The input connection is balanced, with a nominal impedance of 40 K
Ω
(20 K
Ω
unbalanced). The next list shows the input pins correspondence as A.E.S recommends:
PROGRAM INPUT - XLR-3-31
PIN 1
0 V
PIN 2
HOT (+)
PIN 3
COLD (-)
The input connection depends on two factors, the first is the type of input signal balanced or
unbalanced, and the second the ground configuration of the sound source (floating or ground-
referenced). The next pictures show some of the different possibilities of connection, relying on the
type of input signal, balanced or unbalanced and according to the ground configuration of the
equipment (floating or ground-referenced).
In the next diagrams, we use the following symbols:
Sound source with mains cord without ground connection.
Sound source with mains cord with ground connection.
Sound source with the EARTH-LINK OFF.
Sound source with the EARTH LINK ON.
UNBALANCED INPUT:
This type of connection will be used when the sound source does not provide balanced
output. If it’s possible it is better using the connection type 1.
WB-200 SERIES INTERCOM SYSTEM — WBS-202 DUAL CHANNEL WIRELESS BASE STATION
