Audio-technica ATW-1128, ATW-1127 User Manual
1100 Series Professional
VHF Wireless Systems
ATW-1127
UniPak™Transmitter System
ATW-1128
Handheld Dynamic Microphone System
Installation and Operation
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 Audio-Technica wireless microphone
system is the successful result of years of design and
manufacturing experience.
This professional wireless system includes a receiver and
either a body-pack or a handheld transmitter on a specific
crystal- controlled frequency.
The receiver features true diversity reception. Two antennas
feed two completely independent RF sections on the same
frequency; automatic logic circuitry continuously compares and
selects the superior received signal, providing better sound
quality and reducing the possibility of interference and dropouts.
The receiver is made to be mounted in a standard 19" rack (1U).
The versatile UniPak
™
body-pack transmitter has both low- and
high-impedance inputs plus a bias connection, for use with
dynamic and electret condenser microphones, as well as Hi-Z
instrument pickups. Both the handheld and UniPak transmitters
use internal 9-volt batteries and have Off/Standby/On switches,
battery condition indicators, and battery-save switches.
Please note that in multiple-system applications there must be
a transmitter-receiver combination on a
separate
frequency for
each input desired (only one transmitter for each receiver).
Because the wireless frequencies are in or near VHF TV
frequencies, only certain wireless frequencies are useable in a
particular geographical area. Also, only certain of the available
operating frequencies may be used together. (Frequency selection
information will be found on page 7.)
Location
For best operation the receiver
should be at least 3 ft. above
the ground and at least 3 ft.
away from a wall or metal surface to minimize reflections.
The transmitter should also be
at least 3 ft. away from the
receiver, as shown in Figure A.
Keep antennas away from noise
sources such as motors, automobiles, and neon lights, as well
as large metal objects.
Output Connections
There are two audio outputs on the back of the receiver:
balanced (220 mV) and unbalanced (350 mV). 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 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 of the receiver to the mixer.
The two isolated audio outputs permit simultaneous feeds to
both unbalanced and balanced inputs. For example, both a
guitar amp and a mixer can be driven by the receiver.
Antennas
Assemble the two whip antennas
to the special connectors provided.
Screw the whips into the threaded
side holes at the rear of the connector
(Fig. B).
Attach the antennas to the antenna
input jacks. The antennas are normally
positioned in the shape of a “V”
(45° from vertical) for best reception.
Do not try to move the antenna rod
after the connector shell has been
tightened down. Always loosen the
connector shell completely before
repositioning the rod.
If there is not sufficient space above the receiver and/or if the
receiver is installed in a metal cabinet, the antennas can be
mounted in the threaded holes in the back of the connectors
so the antennas will stick straight out from the back of the
receiver. Use one set of threaded holes or the other; do not
attempt to bend the antenna rods. (The optional accessory
ATW-RA1 rack-mount antenna kit brings antenna inputs to the
front of the receiver.)
Power Connections
Connect the included AD1205A AC adapter to the DC power
input on the back of the receiver. Then plug the adapter into a
standard 120 volt 60 Hz AC power outlet.
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.
This device complies with part 15 of the FCC Rules.
Operation is subject to the condition that this device does
not cause harmful interference.
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.
Professional VHF Wireless Systems
Installation and Operation
Receiver Installation
Introduction
Fig. A Receiver Location
Fig. B
Antenna Assembly
2
Individuals with implanted cardiac pacemakers or AICD
devices: Please see notice on back cover.
ANT. A
VHF DIVERSITY RECEIVER
MIN MAX
AF PEAK
AF LEVEL
SQ. ADJ.
TUNER A TUNER BPOWER
OFFON
Front Panel Controls and Functions (Fig. C)
1. POWER SWITCH: Press switch on, and the “power”
indicator will light.
2. POWER INDICATOR.
3. TUNER OPERATION INDICATORS: Indicate which tuner
has the better reception and is in operation.
4. AF PEAK INDICATOR: Indicates when maximum transmitter
modulation without distortion has been reached.
5. SQUELCH CONTROL: Adjusts level of noise-muting circuit
(preset at factory but can be adjusted as circumstances
warrant).
6. AF LEVEL CONTROL: Adjusts the level at both audio
output jacks. Does not affect AF Peak indicator.
7. MOUNTING ADAPTERS: For mounting the receiver in any
standard 19" rack. Attach to receiver with screws supplied.
Rear Panel Controls and Functions (Fig. D)
8. TUNER “B” ANTENNA JACK: Antenna connector for
tuner “B.” Attach the antenna directly, or extend it with
an antenna cable.
9. BALANCED AUDIO OUTPUT JACK: XLRM-type connector.
A standard 2-conductor shielded cable can be used to
connect the receiver output to a balanced aux-level input
on a mixer.
10. GROUND LIFT SWITCH: Disconnects the ground pin of
the balanced output (9) from ground. Normally, the switch
should be to the left (ground connected). If hum caused by
a ground loop occurs, slide switch to the right.
11. UNBALANCED AUDIO OUTPUT JACK:
1
/4" phone jack.
Can be connected to an unbalanced aux-level input of
a mixer or tape recorder.
12. DC POWER INPUT: For the provided AD1205A AC adapter,
or other 12-18V DC source. (Receiver requires 350 mA.)
13. TUNER “A” ANTENNA JACK: Antenna connector for
tuner “A.” Attach the antenna directly, or extend it with
an antenna cable.
Receiver Controls and Functions
Fig. C Receiver Front Panel
Fig. D Receiver Rear Panel
ANT. B ANT. A
AF OUT
BALANCED
GROUND
LIFT
GROUND
AF OUT
UNBALANCED
DC 12V~18V
350 mA
3
21
8 9 11
1210
13
3 34 5 6 77
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