Telex ALP-450 - Manual
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Table of Contents:
- Page 2 – Figure 2
- Page 3 – Clamps; Figure 4
- Page 4 – Coax Cable; Wall; MOUNTING SUGGESTIONS; Mic Boom
- Page 6 – ACCESSORIES; Length
INSTRUCTION MANUAL
General Description
The ALP-450 is a broadband directional log peri-
odic antenna. It will receive any frequency from
450 to 900 MHz. The “gain” of this antenna en-
ables it to receive signals from a greater distance
than a typical “whip” type antenna.
Antenna Placement
The ALP-450 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
The ALP-450 is supplied with a variety of mount-
ing hardware. It should always be mounted verti-
c a l l y w i t h t h e a r r o w s p o i n t i n g t o w a r d t h e
transmitter(s). See Figure 1.
Log Periodic Antennas are also directional (like a
TV antenna) and will have the best reception when
pointed at the transmitter. This yields the benefit of
less interference from unwanted signals coming
from the back or side of the antenna.
-1-
8601 East Cornhusker Highway, P.O. Box 5579, Lincoln NE 68505
UHF Log Periodic Antenna
Order No. 71147000
PN802573
SPECIFICATIONS
(average)
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
Figure 1
Antenna Mounting
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Summary
Microphone Stand Adaptor Attach the microphone stand adaptor using thescrews and spacers supplied with it. See Figure 2. Angle Bracket A t t a c h t h e a n g l e b r a c k e t u s i n g t h e n u t s ,lockwashers, and screws supplied with it. Self tap-ping screws are supplied for securing the brack...
Clamps Clamps are provided for mounting the ALP-450 onpipes, scaffolds, tree limbs, etc.. Attach the clampswith the hardware supplied. See Figure 4. Do not clamp the antenna to horizontal metalobjects that extend past the clamp. See Figure 5.This will detune the antenna and cause loss ofrange and pe...
Coax Cable For best results, it is recommended that cable lossesbe kept under 4 dB. (Every 3 dB of signal loss re-sults in a system operating distance reduction of25%). See the accessories section of this manual for spe-cial low loss cable assemblies. -4- Wall MOUNTING SUGGESTIONS Mic Boom Top Surfa...
