Electro Voice Radio Antenna LPA500 User Manual

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LPA500 UHF Log Periodic Antenna  
Owner’s Manual  
Description  
The Electro-Voice LPA500 is a broadband di-  
rectional log periodic antenna. It is optimized for  
reception of frequencies from 450 to 900 MHz.  
The gain of this antenna enables it to receive  
signals from a greater distance than a typical  
“whip” type antenna.  
Log periodic antennas are very directional and  
will have the best reception when pointed at the  
transmitter. This design also means less interfer-  
ence from unwanted signals coming from the  
back or side of the antenna.  
SPECIFICATIONS  
(Typical)  
Gain..................................................................................................................................4.6 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  
Placement  
The LPA500 should be placed in a position that  
has a clear, unobstructed path to the transmitter.  
Obstructions to the signal such as walls, ceilings  
and metal objects will reduce range and perfor-  
mance.  
Generally speaking, placing the LPA500 at an  
elevated location will yield the best performance  
over the largest area.  
MOUNT  
VERTICALLY  
Antenna Mounting  
The LPA500 is supplied with a variety of  
mounting hardware to make installation easy. It  
should always be mounted vertically with the  
arrow pointing towards the transmitters(s). See  
Figure 1. when oriented correctly, the LPA500  
will appear as a thin piece of metal when  
viewed from the transmitter’s position.  
For best results, do not clamp the LPA500 to  
horizontal metal objects that extend past the  
clamp (see Figure 5). Metal rods or other objects  
that block part of the large face of the antenna  
will detune it and cause loss of performance.  
END VIEW  
Figure 1  
Antenna Mounting  
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Clamps  
Clamps are provided for mounting the LPA500 on  
pipes, scaffolds, tree limbs, etc.. Attach the  
clamps with the hardware supplied. See Figure 4.  
LPA500  
BOLT  
NOTE OFFSET  
IN CLAMPS  
WING NUT  
LOCKWASHER  
Figure 4  
Clamps  
Do not clamp the antenna to horizontal metal  
objects that extend past the clamp. See Figure  
5. This will detune the antenna and cause loss  
of range and performance.  
LPA500  
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LOG PERIODIC ANTENNA  
UHF  
THIS END TOWARD TRANSMITTER  
GOOD  
BAD  
Figure 5  
Clamp Mounting  
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Model  
Part Number Length  
Connectors and Cable  
CXU-10  
CXU-25  
CXU-50  
CXU-75  
CXU-100  
690419  
10 ft (3 M)  
The LPA500 is equipped with a TNC connector  
to provide reliable signal connection. To avoid  
signal strength reduction, special low-loss cables  
should be used. These are available from  
Electro-Voice in the following lengths:  
71151-025  
71151-050  
71151-075  
71151-100  
25 ft (7.6 M)  
50 ft (15 M)  
75 ft (23 M)  
100 ft (30 M)  
MOUNTING SUGGESTIONS  
LPA500  
LPA500  
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LOG PERIODIC ANTENNA  
UHF  
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LOG PERIODIC ANTENNA  
UHF  
THIS END TOWARD TRANSMITTER  
THIS END TOWARD TRANSMITTER  
Mic Boom  
Mic Stand  
LPA500  
LPA500  
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LOG PERIODIC ANTENNA  
UHF  
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LOG PERIODIC ANTENNA  
UHF  
THIS END TOWARD TRANSMITTER  
THIS END TOWARD TRANSMITTER  
Wall  
Top Surface  
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LPA500  
LPA500  
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LOG PERIODIC ANTENNA  
UHF  
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LOG PERIODIC ANTENNA  
UHF  
THIS END TOWARD TRANSMITTER  
THIS END TOWARD TRANSMITTER  
CUT OFF IF POSSIBLE  
Pipe or Scaffold  
Tree Limb  
LPA500  
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LOG PERIODIC ANTENNA  
UHF  
THIS END TOWARD TRANSMITTER  
Combination:  
Bracket with Clamps  
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Uniform Limited Warranty  
Electro-Voice products are guaranteed against malfunction due to defects in materials or  
workmanship for a specified period, as noted in the individual product-line statement(s) be-  
low, or in the individual product data sheet or owner’s manual, beginning with the date of  
original purchase. If such malfunction occurs during the specified period, the product will be  
repaired or replaced (at our option) without charge. The product will be returned to the cus-  
tomer prepaid.  
Exclusions and Limitations: The Limited Warranty does not apply to: (a) exterior finish or  
appearance; (b) certain specific items described in the individual product-line statement(s)  
below, or in the individual product data sheet or owner’s manual; (c) malfunction resulting  
from use or operation of the product other than as specified in the product data sheet or  
owner’s manual; (d) malfunction resulting from misuse or abuse of the product; or (e) mal-  
function occurring at any time after repairs have been made to the product by anyone other  
than Electro-Voice or any of its authorized service representatives.  
Obtaining Warranty Service: To obtain warranty service, the customer must deliver the  
product, prepaid, to Electro-Voice or any of its authorized service representatives together  
with proof of purchase of the product in the form of a bill of sale or receipted invoice. A list  
of authorized service representatives is available from Electro-Voice at 600 Cecil Street, Bu-  
chanan, MI 49107 (616/695-6831 or 800/234-6831).  
Incidental and Consequential Damages Excluded: Product repair or replacement and re-  
turn to the customer are the only remedies provided to the customer. Electro-Voice shall not  
be liable for any incidental or consequential damages including, without limitation, injury to  
persons or property or loss of use. Some states do not allow the exclusion or limitation of in-  
cidental or consequential damages so the above limitation or exclusion may not apply to you.  
Other Rights: This warranty gives you specific legal rights and you may also have other  
rights which vary from state to state.  
Electro-Voice Wireless Systems are guaranteed against malfunction due to defects in mate-  
rials or workmanship for a period of one (1) year from the date of original purchase. The  
Limited Warranty does not extend to cables or cable connectors. Additional details are in-  
cluded in the Uniform Limited Warranty Statement.  
Service and repair addresses for this product:  
Electro-Voice, 12000 Portland Ave. South, Burnsville, MN 55337  
(952) 884-4051, (800) 828-6107 FAX (952) 887-9212  
and  
Telex Communications, Inc.  
8601 East Cornhusker Highway,  
Lincoln, Nebraska 68507 (402/467-5321).  
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12000 Portland Ave. South, Burnsville, MN 55337  
(952) 884-4051, (800) 828-6107 FAX (952) 887-9212  
MANUAL - LPA500  
©Telex Communications, Inc. • July 2002 • Litho in U.S.A.  
Part Number 801752  
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