Telex ALP-450 Instruction Manual

8601 East Cornhusker Highway, P.O. Box 5579, Lincoln NE 68505
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.
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

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-
cally with the arrows pointing toward the
transmitter(s). See Figure 1.
UHF Log Periodic Antenna
Order No. 71147000
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.

SPECIFICATIONS

(average)
-1-
PN802573
Figure 1
Antenna Mounting