AKG Acoustics WMS 40 - Manual (Page 62)

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A
NTENNAS TAILORED TO EVERY
S
ITUATION
AKG WMS 4000 ANTENNAS/ACCESSORIES
Selecting and placing antennas
The antenna is the “ear” of the radio system, which is why anten-
nas must be selected and placed carefully. Antennas have polar
patterns similar to those of microphones, and depending on the
application, you may need Yagi antennas (comparable to cardio-
id/hypercardioid microphones), Log Periodic (like shotgun micro-
phones), or omnidirectional antennas.
If the transmitters will be used only within a rather small area
such as a stage, use directional antennas. Directional antennas
are generally used to overcome long distances or suppress unwan-
ted signals from other directions, e.g., at open-air locations.
Omnidirectional antennas are ideal for near-field applications
where no external-direction interference is expected, e.g., indoor
events (most directional antennas are big and difficult to conceal)
or multipurpose halls with no preferred direction.
Installed sound
Live sound
TV studio
Theater
Worship center
With its antennas and optional accessories spe-
cially “tailored” to the WMS 4000 System,
AKG offers the optimum solution to any type of
application, allowing users to implement even
the most complex antenna networks easily and
efficiently.
With its omnidirectional polar pattern, the
RA 4000 B Booster Antenna is is a good choice
for most applications. Thanks to its rugged,
water-resistant case and the integrated antenna
booster for use with antenna cables up to 180
m (600 feet) long, the RA 4000 B is even sui-
ted for outdoor applications.
The SRA 1 directional antenna is especially
suitable for setting up long-range radio links if
short antenna cables are used. Because of the
passive operation and the 70° beam angle in
combination with good off-axis attenuation and
front-to-rear ratio, it works particularly well in
interference-prone RF environments.
The SRA 2 B is an active directional antenna
that works with long-range radio links (up to
300 m / 1000 feet) and long antenna
distances. An optional laser positioning pointer
makes it easy to aim the antenna precisely at its
target area.
The AB 4000 is a highly efficient antenna boo-
ster for inserting into long antenna cables. One
booster can compensate for approx. 17 dB
cable attenuation, allowing cable runs to be
extended by approx. 60 m (200 feet). Up to 2
antenna boosters can be used in series for
extremely long cable runs.
The ASU 4000 is a remote power adapter for
creating additional power feeds to complex
antenna networks. Thanks to its small dimen-
sions, it is even possible to integrate the
ASU 4000 into narrow antenna cable ducts at
a later date.
Cabling example/cable lengths:
Maximum cable lengths:
90 m / 300 ft. (@Band VI) to 125 m / 410 ft. (@Band I) of RG 58 180 m / 600 ft. (@Band VI) to 250 m / 820 ft. (@Band I) of RG 213
AKG WMS 4000 ANTENNAS