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elex
TELEX COMMUNICATIONS, INC. 12000 Portland Ave. South, Burnsville, MN 55337
UAD4
CAT. NO. 301614100 600-780 MHz
Instruction Sheet
General Description
The UAD4 Amplified Antenna Splitter makes it
possible to operate four UHF wireless diversity
microphone receivers on four separate frequen
cies using only two antennas.
SPECIFICATIONS
Frequency Range 301614100.................................................................................600-780 MHz
301614101.................................................................................780-900 MHz
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CAT. NO. 301614101 780-900 MHz
AMPLIFIED UHF
ANTENNA SPLITTER
It also features a high degree of output isolation;
a necessity in multi-frequency systems to prevent
intermodulation.
The UAD4 Splitter is compatible with Telex
UHF diversity wireless receivers.
PN 804036 Rev A
3rd Order Intercept Output ...........................................................................greater than 18 dbm
Net Gain ............................................................................................................greater than 2 dB
Noise Figure ...........................................................................................................less than 3 dB
Output Isolation...............................................................................................greater than 20 dB
Connectors, Antenna..........................................................................Standard TNC receptacles
Power Requirements................................................................................. 100-240VAC 50/60Hz
Features
The UAD4 is equipped with TNC type connec
tors. Low loss coaxial cables are also supplied
for splitter to receiver antenna jack connections.
The UAD4 has an internal power supply. Power
out jacks and cables are provided to supply up
to four receivers thus eliminating excess power
supply clutter.
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Rack panel mounting “ears” allow the UAD4 to
be mounted in a standard 19 inch equipment
rack. “Knock outs” in the ears allow front con
nection of antenna cables.
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System Configuration
Figure 2 illustrates the typical system configura
tion using the UAD4.
Figure 3 illustrates an arrangement where two
splitters have been cascaded. By connecting one
of the outputs of the first splitter to the antenna
inputs of the second splitter, three additional re
ceivers may be driven by a single pair of anten
nas.
SPECIAL NOTE: In any system, unused split
ter outputs should be terminated with a 50 ohm
“dummy load”. See the accessories listing at the
end of this manual.
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INPUT A
12
OUTPUT A
Tel e x
POWER
UAD 4
ANTENNA
SPLITTER
Front View
3
4
POWER OUT
1234
15VDC
12
OUTPUT B
3
4
INPUT B
90-260VAC 50-60 Hz
POWER
Rear View
Figure 1
Front and Rear View
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INPUT A
OUTPUT A
1234
RECEIVER 1
RECEIVER 2
RECEIVER 3
RECEIVER 4
POWER OUT
1234
15VDC
OUTPUT B
1234
INPUT B
90-260VAC 50-60 Hz
POWER
ANTENNA
INPUT A
INPUT A
OUTPUT A
12
OUTPUT A
12
Figure 2
System Configuration
3
3
POWER OUT
4
1234
15VDC
TO RECEIVERS
ONLY
TO RECEIVERS
OR SPLITTERS
POWER OUT
4
1234
15VDC
12
12
OUTPUT B
OUTPUT B
ANTENNA
3
3
INPUT B
4
INPUT B
4
90-260VAC 50-60 Hz
POWER
90-260VAC 50-60 Hz
POWER
TO RECEIVERSONLY
(DO NOTFEED SPLITTERS FROM SECONDARY UNITS)
Figure 3
Cascading
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Antenna Requirements
The UAD4 may be used with a variety of anten
nas. For best results, use a pair of ALP-450 di
rectional log periodic antennas. See Figure 4.
The ALP-450 offers the best performance and
broadest bandwidth available.
Good results may be obtained with optional
CLA or FA-500 1/2 wave antennas.
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The 1/4-wave antennas that are supplied with
the Telex wireless systems will provide adequate
performance in some situations. The 1/4-wave
antennas should be oriented as shown in Figure
5. Do not use 1/4-wave antennas for remote
mounting.
elex
R
T
ALP-450
THIS ENDTOWARD TRANSMITTER
ALP-450
1/2 Wave Antenna
Figure 4
Antennas
Antenna Placement
If antennas are mounted directly to the UAD4,
they should be configured as shown in Figure 5.
CLA
FA-500
1/2 Wave Antenna
Do not rack mount the UAD4 in this configu
ration. Serious loss of range and performance
may occur.
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INPUT A
OUTPUT A
12
Place the UAD4 with antennas in a location that
is in direct view of the transmitters for best re
sults.
4
POWER OUT
1234
15VDC
3
OUTPUT B
12
3
Figure 5
1/2 Wave Antenna Mounting
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INPUT B
4
90-260VAC 50-60 Hz
POWER
Antenna Placement for Optimum Range
and Rack Mounting
For maximum range and when rack mounting,
the antennas must be remotely located.
The ALP-450 comes complete with a variety of
mounting hardware and 10 feet (3 meters) of
low loss coaxial cable. A combination mounting
bracket (Model No. AB-2) with 10 feet of coax
ial cable is available for 1/2 wave antennas.
Antennas should be placed in a location with a
clear “signal path” to the transmitter. This “path”
should be as short and free of obstructions as
possible. Obstructions, such as walls ceilings,
and metal objects, will reduce range and perfor
mance.
Rack Mounting
Insert the unit into a 19" rack enclosure and se
cure with screws (not supplied).
Rack Mounted Antenna Connectors
Antenna cable connections may be made to the
front of the rack mounted UAD4 by installing
the adaptor cables supplied. Proceed as follows:
Remove the plug “knock outs” from the
·
front panel. See Figure 6.
Install the adaptor cables from the back side
·
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of the bracket.
Tighten the nut and lockwasher securely.
·
Attach the other end of the cables to the in
·
puts of the UAD4. Tighten securely.
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Front of rack antenna connectors were de
signed to allow easier hook up of antenna ca
bles. We do not recommend mounting
antennas directly to the connectors since per
formance may be degraded.
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Coax Cable
For best results, it is recommended that cable
losses be kept under 4 dB. (Every 3 dB of signal
loss results in a system operating distance reduction of 25%.
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See the accessories section of this manual for
special low loss cable assemblies.
REMOVE PLUG
Figure 6
Antenna Connectors
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12 Volt Power On "Antenna In" Jacks
To power UAA-500 in-line antenna amplifiers,
12 volt power is available on the center pin of
the antenna in jacks. This power is disabled
when the UAD4 leaves the factory but may be
turned on by the installer.
To turn on the 12 volts, first take off the cover
of the splitter by removing the screws. The
jumper is installed on one pin of the header at
the factory. To turn on power, unplug the
jumper and install it on both pins of the header.
SeeFigure7.
J10
J10
CAUTION: Do not attach antennas and splitters
with a DC short circuit to the antenna in jacks
when the power is turned on. Damage could re
sult to the splitter or other devices.
The following antennas and accessories may be
used with power on: FA-1, CLA-X, ALP-450B,
and UAA-500.
The following antennas and accessories may be
used with the power off: FA-1, CLA-X, and
ALP-450.
J10
J10
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C32
C33
L8
VC3
VC3
L8
C31
C31
J16
J16
J16 POWER ON
J1
L6
C30
C25
J11
C26
J11POWERON
C33
C32
L8
VC3
VC3
L8
C31
C31
J16
J16
J16 POWER OFF
J1
L6
C30
C25
J11
C26
J11 POWER OFF
Figure 7
Moving Jumper
(Be sure to move jumper on both headers)
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UAD4 Accessories and Replacement Parts
AC Power Cables
550024000 Europe
550024002 U.K.
550024013 North America
690513 Japan
T
elex
ALP-450
THIS ENDTOWARDTRANSMITTER
R
TP-2 50 OHM/TNC dummy load
(For unused outputs on the UAD-4)
Part No. 650095
UAD4 Cables
Model Type Part No.
CXU-2 2 Ft. Coaxial Cable 691459
PC-1 2 Ft. Power 690396
CXU-1 1 Ft. Coaxial Cable 690401
(for rack ears)
Special low loss antenna cables with
TNC connectors
Model Length Order No.
CXU-10 10 Ft. (3 meter) 690419
CXU-25 25 Ft. (7.6 meter) 71151-025
CXU-50 50 Ft. (15 meter) 71150-075
CXU-75 75 Ft. (23 meter) 71151-075
CXU-100 100 Ft. (30 meter) 71151-100
ALP-450
450-900 MHz Log Periodic Antenna
Includes mounting hardware and 10 feet (3 me
ter) coaxial cable with TNC connectors
Order No. 71147000
Model FA-500 1/2 wave Flexible Antenna,
680-870 MHz
Order No. 860031
AB-2 Combination
Antenna Bracket and 10 foot (3 meter) coaxial
cable with TNC connectors. Use with FA-500
Order No. 71138000
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UAA-500
Low noise antenna amplifier, 500-900 MHz
(antenna not included)
Order No. 7186400
CLA Halfwave Antenna
CLA-1 520-565 MHz
CLA-2 565-615 MHz
CLA-3 615-660 MHz
CLA-4 660-690 MHz
CLA-5 690-725 MHz
CLA-6 725-760 MHz
CLA-8 798-865 MHz
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PRINTED IN U.S.A.
Copyright© 2004 by Telex
TELEX COMMUNICATIONS, INC.
All rights reserved
July 2004
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