Telex ALP-450 instruction manual

INSTRUCTION MANUAL

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.

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.

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.

Log Periodic Antennas are also directional (like a

TVantenna) and will have the best reception when

pointedat 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

Order No. 71147000 PN802573

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