AKG Acoustics WMS 40 - Manual (Page 80)

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“The devil is in the details” is a saying that
is very often true of wireless systems. Even if
multichannel setups are no problem for the
WMS 4000 thanks to frequency programs,
Auto Setup etc., situations will arise where
the greatest problem is not the number of
channels but the correct design of a system
with just one channel. Specific architectural
conditions do not call for cutting-edge tech-
nology but rather for ingenious antenna posi-
tioning and the availability of small and
helpful additional components required for a
well-conceived system. In this example, we needed a single-channel
wireless system for a three-story reinforced-
concrete building with an L- shaped plan.
The task sounds simple: the transmitter must
deliver a signal from any place on each floor.
The only wqay to solve this problem is to use
long antenna cable runs and booster anten-
nas. The latter are simply suspended from
the ceiling at the junction between the two
wings of the L-shaped plan. It is essential to
pay attention to the layout and the distances
between the antennas. Antenna combiners
connect the antenna cables from each floor
to the receiver.
However, the cable runs to the last floor are
too long for the receiver to supply enough
power to the booster antennas. This problem
can be solved by inserting an ASU 4000
remote feeding adapter and power supply
into each antenna cable. The ASU 4000 is
available with AC power supplies for a variety
of AC voltages. A simple, inconspicuous and
cost efficient solution that minimizes the
number of required components.
E
XAMPLE
: 1-
CHANNEL
S
YSTEM FOR
S
PECIFIC
A
RCHITECTURAL
R
EQUIREMENTS
WMS 4000 1-CHANNEL SETUP
ASU 4000 Remote Power Supply compensates
for power drain of long antenna cables
The ASU 4000 is a small but ingenious accessory for ex-
tremely long antenna cable runs. It comes with a power
supply for one of four AC voltage ranges that allos the
device to used in virtually every country. The compact
dimensions and the rugged, splash-proof metal case make
it the first choice for open-air applications.
1 x SR 4000 True diversity receiver
Specification:
Amount Item Description
1 x HT/PT 4000 Hendheld or portable transmitter
2 x ASU 4000 Remote powerd adapter for antennas
6 x RA 4000 B Omnidirectional wideband booster antenna
2 x AB 4000 Antenna booster
4 x ZAPD 21 Antenna combiner
AKG WMS PRACTICAL EXAMPLES