Telex TV Antenna ALP 600 User Manual

ALP-600  
R
UHF Log Periodic Antenna  
TELEX COMMUNICATIONS, INC.  
8601 East Cornhusker Highway, P.O. Box 5579, Lincoln NE 68505  
Order No. 878896  
801542  
INSTRUCTION MANUAL  
General Description  
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.  
The ALP-600 is a broadband bi-directional log pe-  
riodic antenna. It will receive any frequency from  
520 to760MHz. The “gain” of this antenna enables  
it to receive signals from a greater distance than a  
typical “whip” type antenna.  
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)  
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  
T
elex  
The ALP-600 is supplied with hardware for tubular  
clamping. It should always be mounted vertically  
with the ground and perpendicular to the transmit-  
ter(s), See Figure 1.  
TR-600  
Figure 1  
-1-  
 
ALP-600  
Antenna Pattern  
Figure 4  
Typical ALP-600 UHF Bi-Directional Antenna Pattern  
-3-  
 
Clamps  
Clamps are provided for mounting the ALP-600  
onto the antenna mast. Attach the clamps with the  
hardware supplied. See Figure 5.  
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.  
Figure 5  
Clamps  
Coax Cable  
For best results, it is recommended that cable losses  
be kept under 4 dB. (Every 3 dB of signal loss re-  
sults in a system operating distance reduction of  
25%).  
A 10 ft coax cable (PN 690419) is included with  
the ALP-600.  
ACCESSORIES  
Telex  
Special Low Loss Antenna Cables  
with TNC Connects  
Antenna Mast  
Four sections, clear anodized aluminum  
mast with extended length of 90 1/4".  
Order No. 878897-1  
Length  
Part No.  
690419  
71151-029  
71151-050  
71151-075  
71151-100  
10 Ft. (3 meters)  
25 Ft. (7.6 meters)  
50 Ft. (15 meters)  
75 Ft. (23 meters)  
100 Ft. (30 meters)  
PRINTED IN U.S.A.  
Copyright© 1997 by Telex  
TELEX COMMUNICATIONS, INC.  
All rights reserved.  
July 1997  
-4-  
 

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