Audio-Technica ATW-DA49 User Manual

Professional UHF
Wireless Systems

ATW-DA49 Diversity UHF Antenna Distribution System, 440-900 MHz

Installation and Operation

Prior to use of this product, review all safety markings and instructions.

CAUTION

RISK OF ELECTRIC

SHOCK

DO NOT OPEN

To prevent electric shock, do not remove the cover. There are no
user-serviceable parts inside. Internal adjustments are for qualified
professionals only. Refer all servicing to qualified service personnel.

Pour prévenir un choc électrique, ne pas ouvrir le couvercle. Il n’y
aucune pièces de rechanges à l’intérieur. Tout ajustement interne
doit être fait par une personne qualifié seulement. Référez tout
réparation au personnel qualifié.

Warning/Attention:

To prevent fire or shock hazard, do not
expose this appliance to rain or moisture.
Pour prévenir feu ou choc électrique, ne pas
exposé l’appareil à la pluie ou à l’humidité.

AVIS

RISQUE DE CHOC

ÉLECTRIQUE

NE PAS OUVRIR

ATW-DA49 Installation and Operation

The ATW-DA49 is a UHF active unity-gain diversity antenna
distribution system that enables one pair of antennas to feed
multiple wireless systems. One ATW-DA49 unit can support up
to four wireless receivers.

A wide-band unit that operates over a nominal 440-900 MHz
range, the ATW-DA49 is designed to complement
Audio-Technica 2000 and 3000 Series wireless systems. It is
also suitable for many other wireless systems (with external
BNC antenna connections) operating within the 440-900 MHz
range.

WARNING: This apparatus must be grounded.

This product is a safety class 1 product. There must be an
uninterruptible safety earth ground from the main power
source to the product’s AC input. Whenever it is likely that
the protection has been impaired, disconnect the power cord
until the ground has been restored.

ATTENTION: Cet appareil doit être mise à la terre.

Cet appareil est de classe de sûreté 1. Il doit y avoir un
ininterrompable de mise à la terre de sécurité provenant de
la source principale de courant de l’appareil de l’entrée du
courant alternatif. Quand la protection a été affaiblie, débrancher
le fil de courant jusqu’à la mise à terre a bien été réétablie.

The detachable IEC type power input cord supplied is intended for
use in regions with mains voltage in the range of 100–125VAC
only. Use only the furnished power cord that includes the
appropriate NEMA 5-15P/ANSI C73.11 type attachment plug.

For use in geographical areas with mains voltage outside of the
range 100–125VAC, it is necessary for the user to utilize a power
cord rated and configured for operation in their region. Replace the
supplied power cord with a cord rated for correct voltage operation.

Power Connections

The switching power supply is designed to operate properly
from any AC power source 100-240V, 50/60 Hz without user
adjustment. Simply connect the power supply to a standard AC
power outlet,

approved for the country of use

using only an IEC 320-type input cordset

.

Front Panel Controls and Functions (Fig. A)

1. POWER SWITCH: Press switch to apply power to unit.
Press again to turn unit off.

The ATW-DA49 provides two identical sections, one for each
antenna of a UHF diversity wireless system. Each section in
the unit comprises an antenna input and four isolated receiver
outputs. All RF connectors are BNC-type. Ten BNC-to-BNC RF
interconnect cables are included with the unit.

Antennas can be remotely located from the unit. However, due
to signal loss in cables at UHF frequencies, use the lowest-loss
RF cable type(s) practical for any cable runs over 25 feet. RG-8
is a good choice. Use only copper-shielded cable, not CATV-type
foil-shielded wire. The included ATW-RM1 rack-mount hardware
kit with RF cables and connectors permits front-panel antenna
mounting.

Either passive or active antennas may be used. Both input
jacks offer switchable +12 V DC output on their center pins to
operate Audio-Technica powered antennas or other in-line RF
devices if desired. Up to 100 mA can be drawn from each
antenna input jack.

Four jacks on the rear panel (controlled by the unit's power
switch) provide 12V DC (center positive) to power as many as
four receivers operating on 12 volts at up to 500 mA each.
Included with the unit are four DC cables appropriate for use
with ATW-R3100 or ATW-R2100 (or like-powered) receivers.

The 12-volt supplies for powering receivers are short-circuit
protected. The unit features all-metal construction for extreme
durability and protection from radio frequency interference.

2. POWER INDICATOR: The indicator will light when power is
applied.

Figure A Front Panel

1

2

2

Rear Panel Controls and Functions (Fig. B)

3. CHANNEL “A” ANTENNA INPUT: Attach the “A” antenna
here, or extend it with a low-loss antenna cable. (Antenna
and cable not included.)

4. CHANNEL “A” DISTRIBUTION OUTPUTS: Four jacks
provide RF distribution to receivers operating within the
440-900 MHz range. Each output should be connected to
only one other antenna input. Unused outputs do not
require termination.

5. CHANNEL “B” ANTENNA INPUT: Attach the “B” antenna
here, or extend it with a low-loss antenna cable. (Antenna
and cable not included.)

6. CHANNEL “B” DISTRIBUTION OUTPUTS: Four jacks
provide RF distribution to receivers operating within the
440-900 MHz range. Each output should be connected to
only one other antenna input. Unused outputs do not
require termination.

7. DC OUTPUT JACKS: Provides 12V DC (center positive) at
up to 500 mA from each jack to power receivers. Connect
the included ATW-RDCN cables here to supply 12V DC to
up to four ATW-R2100 or ATW-R3100 (or like-powered)
receivers.

8. DC POWER INPUT: 3-pin header connector for +12V DC
power input.

Front-mount Antennas–ATW-RM1 Rack Mount Hardware
Kit

(Fig. D)

10. The ATW-RM1 rack-mount hardware kit (includes rack ears
and hardware) is provided to permit attachment in a standard
19" audio equipment rack.

11. Antennas may be mounted on the front of the long rack
ear.

The following parts are included in the kit: Long rack ear;
short rack ear; two BNC bulkhead connectors with mounting
hardware; two 34" BNC-to-BNC cables; six rack-mount screws.

Figure D Front-mount Antennas

Figure B Rear Panel

4

7

Active Antenna Power Switch

NOTE: ATW-A49 antennas do not require power. If you are
using ATW-A49 antennas, or any passive antennas, leave
the switch in the factory-set OFF position.

antenna system that requires power (such as an antenna preamp
or booster) you must open the ATW-DA49 assembly and
activate a switch on the circuit board. See Fig. C. (This enables
the antenna distribution system to pass power through to the
antenna.) Current consumption of the preamp or booster should
not exceed 100 mA.

9. The unit is shipped with the switch in the “off” position.
To change the switch to the “on” position, first

the ATW-A49 is not attached to any power source

use a Phillips screwdriver to remove the four cover screws;
remove the cover; move the switch into the “on” position.
Finally, replace the cover and securely tighten the screws.

8

5

3

(Fig. C)

If you have an

6

be certain

. Next,

10

Assembling the ATW-RM1 Rack Mount Hardware Kit (Fig. D)

• Remove the nut and lock-washer from each bulkhead
connector. Install the connectors
two holes in the long rack ear (see Fig. D). Note that the
flat on the threaded section must be aligned with the flat in
each panel hole.

• Install the lock-washer and nuts (included) over the back of
each bulkhead connector. Secure each connector from the
back with its lock-washer and nut, tightening the nut firmly.

• Connect one end of each provided BNC-BNC cable to the
rear antenna input jacks on the back of the antenna
distribution system amplifier. Attach the other end of each
cable to the back of the BNC bulkhead connectors. Make
certain the bayonet twist-rings are
connectors at both ends.

• Finally, mount the receiver's antennas to each of the BNC
bulkhead connectors.

11

11

from the front into the

fully latched on the

Figure C Antenna Power Switch

9

OFF

ON

Installation and Operation continues on back page

3

ATW-DA49 Set up (Fig. E)

12. +12V DC power is supplied through the ATW-DA49
Antenna Distribution System to each receiver.

13. Channel “B” distribution output connects to antenna “B”
input jack on receiver.

14. Channel “A” distribution output connects to antenna “A”
input jack on receiver.

Figure E ATW-DA49 Set Up

Specifications

Bandwidth 440-900 MHz

Gain 0 dB typical (within specified bandwidth)

Impedance 50 ohms typical (within specified

bandwidth)

Antenna Power (optional) +12V DC, center positive,

100 mA maximum per antenna input
(2 total)

Termination Type BNC Female (10 total)

Power Supply Desktop Switching Power Supply

Rated at 3A @ 12V DC or 36 Watts.
Input Voltage 100-240V AC via
detachable IEC 320/C14 cable.
Output is provided on an overmolded
3-pin Molex-style termination.

Dimensions (Base unit only) 8.27" (210.0 mm) W x

1.79" (45.5 mm) H x

6.93" (176.0 mm) D

Weight 2.0 lbs. (0.9 kg)

Accessories Included IEC 320/C14 power cable;10 BNC-to-

BNC 34" RF cables; 4 DC power
interconnect cables; ATW-RM1 rack kit
for front mounting antennas and
adaptation to a 19" rack.

One-Year Limited Warranty

Audio-Technica professional wireless systems purchased in the
U.S.A. are warranted for one year from date of purchase by Audio­Technica U.S., Inc. ( A.T.U.S.) to be free of defects in materials and
workmanship. In event of such defect, product will be repaired
promptly without charge or, at our option, replaced with a new prod­uct of equal or superior value if delivered to A.T.U.S. or an Authorized

12

Service Center, prepaid, together with the sales slip or other proof of
purchase date.
This warranty excludes defects due to normal wear, abuse, shipping
damage, or failure to use product in accordance with the instruc­tions. This warranty is void in the event of unauthorized repair or
modification, or removal or defacing of the product labeling.

For return approval and shipping information, contact the
Service Dept., Audio-Technica U.S., Inc., 1221 Commerce Drive,
Stow, Ohio 44224.

Except to the extent precluded by applicable state law,

have no liability for any consequential, incidental, or special
damages; any warranty of merchantability or fitness for partic­ular purpose expires when this warranty expires.

This warranty gives you specific legal rights, and you may have other
rights which vary from state to state.

13

14

Outside the U.S.A., please contact your local dealer for warranty
details.

Prior approval from A.T.U.S. is required for return.

Extensive information about using wireless systems and accessories is available on the Audio-Technica Web site at

www.audio-technica.com

A.T.U.S. will

Audio-Technica U.S., Inc.,

1221 Commerce Drive, Stow, Ohio 44224 330/686-2600

Audio-Technica Limited, Old Lane, Leeds LS11 8AG England (0)113 277 1441

P51824 ©2006 Audio-Technica U.S., Inc. Printed in U.S.A.