Telex ALP-600 User manual

INSTRUCTION MANUAL
General Description
The ALP-600 is a broadband bi-directional log pe-
riodic antenna. It will receive any frequency from
520to760MHz.The“gain”ofthisantennaenables
it to receive signals from a greater distance than a
typical “whip” type antenna.
Antenna Placement
The ALP-600 should be placed in a position that
has a clear view of the transmitter(s) for best re-
sults. Obstructions such as walls, ceilings, and
metal objects will reduce range and performance.
Antenna Mounting
TheALP-600issuppliedwithhardwarefortubular
clamping. It should always be mounted vertically
with the ground and perpendicular to the transmit-
ter(s), See Figure 1.
Log Periodic Antennas are also directional and
will have the best reception when pointed at the
transmitter. This yields the benefit of less interfer-
ence from unwanted signals coming from the back
or side of the antenna.
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R
TELEXCOMMUNICATIONS,INC.
8601 East Cornhusker Highway, P.O. Box 5579, Lincoln NE 68505
ALP-600
UHF Log Periodic Antenna
Order No. 878896 801542
SPECIFICATIONS
(average)
Gain..................................................................................................................1.6 dBd
1/2 Power Beam Width.........................................................................................120°
Front-to-Back Ratio...........................................................................................19.4 dB
SWR.......................................................................................................................1.5:1
Input Impedance ................................................................................................50 ohm
Input Connector ....................................................................................................TNC
Size............................................................................12" (304.8mm) x 17" (431.8mm)
T
elex
TR-600
Figure 1

Mounting Suggestions
Figure 3
Top View of Field
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COACHESBOX
TR-600's
ALP-600
FOOTBALL
FIELD
Refer to Figure 4 for typical antenna pattern.
Figure 2
ALP-600 Antenna Mast

ALP-600
Antenna Pattern
Figure 4
Typical ALP-600 UHF Bi-Directional Antenna Pattern
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Clamps
Clamps are provided for mounting the ALP-600
onto the antenna mast. Attach the clamps with the
hardware supplied. See Figure 5.
Coax Cable
Forbestresults,itisrecommendedthatcablelosses
be kept under 4 dB. (Every 3 dB of signal loss re-
sults in a system operating distance reduction of
25%).
Do not clamp the antenna to horizontal metal ob-
jects that extend past the clamp. This will detune
the antenna and cause loss of range and perfor-
mance.
A 10 ft coax cable (PN 690419) is included with
the ALP-600.
ACCESSORIES
PRINTED IN U.S.A.
Copyright© 1997 by Telex
TELEX COMMUNICATIONS, INC.
All rights reserved.
July 1997
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Figure 5
Clamps
Telex
Antenna Mast
Four sections, clear anodized aluminum
mast with extended length of 90 1/4".
Order No. 878897-1
Special Low Loss Antenna Cables
with TNC Connects
Length Part No.
10 Ft. (3 meters) 690419
25 Ft. (7.6 meters) 71151-029
50 Ft. (15 meters) 71151-050
75 Ft. (23 meters) 71151-075
100 Ft. (30 meters) 71151-100