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Professional UHF 
Wireless Systems

ATW-49SP Active Antenna Splitter Kit

Installation and Operation

5.

NOTE: ATW-A49 antennas do not require power. If you are 
using ATW-A49 antennas, skip Step 5.

If you have an antenna 

system that requires power (such as an antenna preamp or booster) 
you must open the ATW-49SP Active Antenna Splitter assembly and 
activate a switch on the circuit board. (This enables the splitter to 
pass power through to the antenna.) Current consumption of the 
preamp or booster should not exceed 100 mA.

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

be certain the splitter is not 

attached to any power source

. Next, use a Phillips screwdriver to 

remove the two screws on the Active Antenna Splitter's access 
panel; remove the access panel; use tweezers to flip the switch 
gently into the “on” position. Finally, replace the access panel and 
securely tighten the two screws. (See Figure 2.)

The Audio-Technica ATW-49SP Active Antenna Splitter Kit includes two
one-input, two-output Active Antenna Splitters designed for use with
Audio-Technica 4000 and 5000 Series UHF wireless receivers and 
ATW-A49 LPDA antennas.* Each Active Antenna Splitter is a 
broadband device (frequency range from 440 to 900 MHz) that splits an
incoming RF signal into two identical outgoing RF signals. One set of
Active Antenna Splitters enables one set of antennas to feed wireless
receivers of different frequency bands. To compensate for RF signal
loss associated with signal splitting, the Active Antenna Splitter 
provides unity gain: there is no RF signal loss from the original antenna
signal.  

Each kit includes:

two Active Antenna Splitters, four 18" BNC-to-BNC

RG 58 coaxial antenna cables, and two BNC-to-BNC barrel adapters.  

NOTE:

The ATW-49SP Antenna Splitter re12V DC power from

any Audio-Technica 4000 or 5000 series receiver or +5 to +14V DC
from any wireless receiver or antenna distribution system that offers
antenna power. At least one of the receiver's or distribution amplifier's
antenna terminals must provide this voltage source. A light on each
Active Antenna Splitter indicates that power has been correctly applied.

* The ATW-49SP Active Antenna Splitter Kit is also suitable for use
with other receivers that are in its specified band, use BNC antenna
connectors, and provide antenna terminal voltage; it may also be used
with a variety of other antennas from Audio-Technica and other 
manufacturers.

HOW TO INSTALL THE ATW-49SP ACTIVE ANTENNA SPLITTERS

1. Connect one 18" BNC-to-BNC RG 58 coaxial antenna cable (four 

supplied) to an OUT connector on one Active Antenna Splitter 
(two supplied). Connect the other end of this cable to the ANTENNA 
A input on either a receiver or distribution amplifier, as shown in
Figure 1. 

NOTE:

A BNC male-to-male barrel adapter (two supplied) 

may be used in place of this cable, for convenience. 

2. Use a second 18" BNC-to-BNC RG 58 coaxial antenna cable to 

connect the opposite OUT connector on the Active Antenna Splitter 
to the ANTENNA A input of a second receiver or distribution 
amplifier.      

NOTE:

At least one of the receiver's (or distribution amplifier's) 

antenna input terminals must p12V DC to power the splitter 
box.  

3. Repeat steps 1 and 2 for the ANTENNA B inputs, using the second 

Active Antenna Splitter.

4. Use coaxial antenna cables (not included) to connect the IN 

connector on each Active Antenna Splitter to a UHF antenna, as 
shown in Figure 1.

Figure 2

Switch

Figure 1

IN

Receiver or

Distribution Amplifier

Receiver or

Distribution Amplifier

OUT

OUT

IN

OUT

OUT

ON

OFF

Active Antenna Splitter with access panel removed.

 

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