System 9
Installation and Operation
2
This device complies with part 15 of the FCC Rules. Operation is subject
to the condition that this device does not cause harmful interference.
A copy of the declaration of conformity can be found on the internet at
www.audio-technica.com.
This device complies with INDUSTRY CANADA R.S.S. 210, en
conformité avec IC: RSS-210/CNR210. Operation is subject to the
following conditions: 1) This device may not cause harmful interference
and 2) this device must accept any interference received, including
interference which may cause undesired operation. Changes or
modifications not expressly approved by Audio-Technica could void your
authority to operate this equipment.
CAUTION!
Electrical shock can result from removal of the receiver
cover. Refer servicing to qualified service personnel. No user-
serviceable parts inside. Do not expose to rain or moisture.
The circuits inside the receiver and transmitter have been precisely
adjusted for optimum performance and compliance with federal
regulations. Do not attempt to open the receiver or transmitter. To do so
will void the warranty, and may cause improper operation.
Notice to individuals with implanted cardiac pacemakers or AICD
devices:
Any source of RF (radio frequency) energy may interfere with normal
functioning of the implanted device. All wireless microphones have
low-power transmitters (less than 0.05 watts output) which are unlikely
to cause difficulty, especially if they are at least a few inches away.
However, since a “body-pack” mic transmitter typically is placed against
the body, we suggest attaching it at the belt, rather than in a shirt
pocket where it may be immediately adjacent to the medical device.
Note also that any medical-device disruption will cease when the RF
transmitting source is turned off. Please contact your physician or
medical-device provider if you have any questions, or experience any
problems with the use of this or any other RF equipment.
Thank you for choosing an Audio-Technica professional wireless
system. You have joined thousands of other satisfied customers who
have chosen our products because of their quality, performance and
reliability. This wireless microphone system is the successful result of
years of design and manufacturing experience.
Audio-Technica’s System 9 is a four-channel frequency-agile wireless
system designed to provide rock-solid performance along with
easy setup and clear, natural sound quality. Featuring stackable,
contemporary styling, System 9 is available in handheld, headworn,
guitar, lavalier and body-pack configurations. The system offers four
compatible user-switchable channels in one of four available VHF
frequencies (169.505, 170.245, 171.045, and 171.905 MHz).
Each System 9 professional VHF wireless system includes a receiver
and either a body-pack transmitter or a handheld microphone/
transmitter. ATW-901 UniPak
®
body-pack transmitter systems include
models pre-packaged with either an AT-GCW guitar cable (/G), a
PRO 8HEcW headworn microphone (/H), a PRO 92cW headworn
microphone (/H92), a PRO 92cW-TH headworn microphone
(/H92-TH), or a lavalier mic (/L) for particular applications. All A-T
Wireless Essentials
®
microphones and cables, available separately,
are pre-terminated for use with any ATW-901 system.
Because System 9 packaging is designed to hold all versions
of the system, some compartments in the carton may be intentionally
left empty.
The ATW-R900 receiver includes a switching power supply that
automatically adapts to changes in mains voltage.
The versatile ATW-T901 UniPak body-pack transmitter has both
a high-impedance input for instruments, and a low-impedance input
with bias connection for use with dynamic and electret condenser
microphones. The ATW-T902 handheld transmitter features a
unidirectional dynamic microphone element.
Both the body-pack and handheld transmitters use internal AA batteries
and have Power/Mute switches and input Trim (level) adjustments.
Receiver Installation
Location
For best operation the receiver should be at least 3' (1 m) above the
ground and at least 3' (1 m) away from a wall or metal surface to
minimize reflections. Keep the receiver antennas away from noise
sources such as digital equipment, motors, automobiles and neon
lights, as well as away from large metal objects. In multi-channel
systems, position receivers at least 3' (1 m) apart and keep operating
transmitters at least 6' (2 m) from the receivers to help assure
maximum RF performance.
Output Connections
There are two audio outputs on the back panel: balanced and
unbalanced. Use shielded audio cable for the connection between the
receiver and the mixer. If the input of the mixer is a
1
/
4
" jack, connect a
cable from the
1
/
4
" unbalanced audio output on the back of the receiver
housing to the mixer. If the input of the mixer is an XLR-type input,
connect a cable from the balanced XLR-type audio output on the back
panel to the mixer.
Power Connection
Connect the DC plug on the included AC power adapter to the DC
power input on the back of the receiver. Secure the cord over the cord
hook on the back of the receiver, to keep the plug from being detached
by an accidental tug on the cord. Then plug the adapter into a standard
120 Volt 60 Hz AC power outlet.
(Note that the receiver has no power Off/On switch. The receiver will be
energized whenever the power adapter is connected and plugged into
the AC outlet. Unplug the power supply from the AC outlet when the
system is not in use — both for safety, and to conserve energy.)
Antennas
A novel “dipole” antenna system on the receiver improves operation
by providing a “ground” element in addition to the usual “signal”
element. Position the two antennas at 90° in the form of a “V,” or
position the left (“signal”) antenna vertically and the right (“ground”)
antenna horizontally, in the shape of an “L” (Fig. A). Use the position
that performs better in your operating environment. Be certain to
extend both antennas to their full 15" (38 cm) length by holding them at
their bases and pulling out on their caps. Both antenna elements may
be swiveled to the left and right, but do not attempt to rotate them in a
screwing/unscrewing motion. To do so may damage the antenna and/or
receiver. For best performance, locate the receiver so its antennas are
in direct line-of-sight to the transmitter’s likely operating position.