R
Telex
TELEX COMMUNICATIONS, INC. 12000 Portland Ave. South, Burnsville, MN 55337
UAD4
CAT. NO. 301614100 600-780 MHz
CAT. NO. 301614101 780-900 MHz
Instruction Sheet
AMPLIFIED UHF
ANTENNA SPLITTER
PN 804036 Rev A
General Description
It also features a high degree of output isolation;
a necessity in multi-frequency systems to prevent
intermodulation.
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.
The UAD4 Splitter is compatible with Telex
UHF diversity wireless receivers.
SPECIFICATIONS
Frequency Range 301614100 .................................................................................600-780 MHz
301614101.................................................................................780-900 MHz
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.
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.
-1-
90-260 VAC 50-60 Hz
OUTPUT
A
OUTPUT
B
POWER OUT
INPUT
A
INPUT
B
1
2
3
4
1
2
3
4
1
2
3
4
15 VDC
POWER
RECEIVER 1
RECEIVER 2
RECEIVER 3
RECEIVER 4
Figure 2
System Configuration
ANTENNA
ANTENNA
90-260 VAC 50-60 Hz
OUTPUT A
OUTPUT B
POWER OUT
INPUT A
INPUT B
1
2
3
4
1
2
3
4
1
2
3
4
15 VDC
POWER
TO RECEIVERS
ONLY
TO RECEIVERS
OR SPLITTERS
90-260 VAC 50-60 Hz
OUTPUT A
OUTPUT B
POWER OUT
INPUT A
INPUT B
1
2
3
4
1
2
3
4
1
2
3
4
15 VDC
POWER
TO RECEIVERS ONLY
(DO NOT FEED SPLITTERS FROM SECONDARY UNITS)
Figure 3
Cascading
-3-
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.
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.
R
T
elex
ALP-450
THIS END TOWARD TRANSMITTER
ALP-450
CLA
1/2 Wave Antenna
FA-500
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.
Do not rack mount the UAD4 in this configu-
ration. Serious loss of range and performance
may occur.
Place the UAD4 with antennas in a location that
is in direct view of the transmitters for best re-
sults.
90-260 VAC 50-60 Hz
OUTPUT A
OUTPUT B
POWER OUT
NPUT A
INPUT B
1
2
3
4
1
2
3
4
1
2
3
4
15 VDC
POWER
Figure 5
1/2 Wave Antenna Mounting
-4-
Antenna Placement for Optimum Range
and Rack Mounting
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:
For maximum range and when rack mounting,
the antennas must be remotely located.
Remove the plug “knock outs” from the
front panel. See Figure 6.
·
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.
Install the adaptor cables from the back side
of the bracket.
·
Tighten the nut and lockwasher securely.
·
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.
Attach the other end of the cables to the in-
puts of the UAD4. Tighten securely.
·
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.
Rack Mounting
Insert the unit into a 19" rack enclosure and se-
cure with screws (not supplied).
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 reduc-
tion of 25%.
See the accessories section of this manual for
special low loss cable assemblies.
REMOVE PLUG
Figure 6
Antenna Connectors
-5-
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.
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.
The following antennas and accessories may be
used with power on: FA-1, CLA-X, ALP-450B,
and UAA-500.
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.
See Figure 7.
The following antennas and accessories may be
used with the power off: FA-1, CLA-X, and
ALP-450.
J10
J10
C33 C32
C33C32
L8
VC3
C31
L8
VC3
C31
J16
J16
J16 POWER ON
J16 POWER OFF
J1
J1
L6
L6
C25 C30
C25 C30
J11
J11
C26
C26
J11 POWER OFF
J11 POWER ON
Figure 7
Moving Jumper
(Be sure to move jumper on both headers)
-6-
UAD4 Accessories and Replacement Parts
AC Power Cables
R
550024000
550024002
550024013
690513
Europe
Telex
ALP-450
THIS END TOWARD TRANSMITTER
U.K.
North America
Japan
TP-2 50 OHM/TNC dummy load
(For unused outputs on the UAD-4)
Part No. 650095
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
UAD4 Cables
Model
CXU-2
PC-1
Type
2 Ft. Coaxial Cable 691459
2 Ft. Power 690396
1 Ft. Coaxial Cable 690401
(for rack ears)
Part No.
CXU-1
Model FA-500 1/2 wave Flexible Antenna,
680-870 MHz
Order No. 860031
Special low loss antenna cables with
TNC connectors
Model
Length
Order No.
CXU-10
CXU-25
CXU-50
CXU-75
10 Ft. (3 meter)
690419
25 Ft. (7.6 meter) 71151-025
50 Ft. (15 meter) 71150-075
75 Ft. (23 meter) 71151-075
AB-2 Combination
CXU-100 100 Ft. (30 meter) 71151-100
Antenna Bracket and 10 foot (3 meter) coaxial
cable with TNC connectors. Use with FA-500
Order No. 71138000
CLA Halfwave Antenna
CLA-1
CLA-2
CLA-3
CLA-4
CLA-5
CLA-6
CLA-8
520-565 MHz
565-615 MHz
615-660 MHz
660-690 MHz
690-725 MHz
725-760 MHz
798-865 MHz
UAA-500
Low noise antenna amplifier, 500-900 MHz
(antenna not included)
Order No. 7186400
-7-
PRINTED IN U.S.A.
Copyright© 2004 by Telex
TELEX COMMUNICATIONS, INC.
All rights reserved
July 2004
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