Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500)
FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746
Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: info@blackbox.com
CUSTOMER
SUPPORT
INFORMATION
JUNE 2000
LW013
24-dBi Directional Antenna
24-DBI DIRECTIONAL ANTENNA
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TRADEMARKS USED IN THIS MANUAL
Any trademarks mentioned in this manual are acknowledged to be the property of the trademark owners.
24-DBI DIRECTIONAL ANTENNA
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1. Specifications
Antenna:
Reflector—Cast magnesium
Gain—24 dBi
Frequency—2150 to 2700 MHz
Impedance—50 ohms
VSWR—1.4:1 maximum
Polarization—Vertical or horizontal
Connector—N-type
Rejection—26 dB minimum
Front/Back Ratio—31 dB minimum
Dispersion—6°H/10°V
General:
Size—24"H x 36"W x 15"D (61 x 91.4 x 38.1 cm)
Weight—4.9 lb. (2.2 kg)
Cable:
Type—LMR 400
Impedance—50 ohms
Attenuation—6.8 dB/100 ft. @ 2.5 GHz or 2500 MHz
Length—2 ft. (0.6 m) with 50-ft. (15.2-m) extension
Connector—N-type, copper SMA
24-DBI DIRECTIONAL ANTENNA
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2. Introduction
2.1 Description
This high-gain directional antenna is used with Black Box Pro Series Wireless Ethernet adapters. Use it with the
LW0055A, LW0056A, LW0057A, LW0058A, or LW0059A for outdoor applications in which higher gain and
larger distances between sites are required. It has a narrow beamwidth of 6°, which increases the sensitivity to
alignment inaccuracy, but decreases the fading caused by multipath propagation.
You can mount the antenna on a mast with a tripod base, or fasten it with guy wires. 50 feet (15.2 m) of low-
loss cable and mounting hardware is included to attach the antenna to a mast of 1 to 2 inches (2.5 to 5.1 cm).
2.2 What the Package Includes
Check to make sure you’ve received the following items. If anything is missing or damaged, please contact Black
Box at 724-746-5500.
2.2.1 P
ACKED IN FEED BOX
• (1) Feed assembly
• (1) Sub-reflector
• (1) #6 x
1
⁄2" stainless screw
• (2) Stainless
1
⁄4 x 20" hex nuts
• (2) Stainless lock washers
• (2) Stainless carriage bolts
2.2.2 P
ACKED IN REFLECTOR BOX
• (2) Reflector halves
• (2) Stainless U-bolts
• (2) Mast clamps
• (1) Mounting “L” shaped bracket
• (4) Keps nuts
• (4) #8-32 machine screws
• (6) Stainless lock washers
• (2) Stainless carriage bolts
• (1) Stainless flat plate washer
24-DBI DIRECTIONAL ANTENNA
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3. Assembly
Figure 3-1 shows the antenna in position for horizontal polarity. Figure 3-2 shows it in position for vertical
polarity.
Figure 3-1. Horizontal Polarity.
Figure 3-2. Vertical Polarity.
24-DBI DIRECTIONAL ANTENNA
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NOTE
Loosely tighten all hardware until the antenna is completely assembled and then
tighten securely.
1. To assemble the two halves, insert the (4) #8-32 machine screws through the front. Secure with the keps
nuts on the back (see Figure 3-3).
Figure 3-3. Securing the Antenna with the Keps Nuts.
2. Place the sub-relector on the front of the feed and secure it with the #6 x
1
⁄2" stainless screw. See Figure 3-4.
Figure 3-4. Securing the Sub-Reflector on the Front of the Feed.
Sub-reflector
Feed
24-DBI DIRECTIONAL ANTENNA
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For Horizontal Polarity:
Refer to Figure 3-1 for proper feed alignment.
For Vertical Polarity:
Refer to Figure 3-2 for proper feed alignment.
3. Determine the polarity of the antenna. (See Figures 3-1 and 3-2.)
4. Place the “L” bracket on the back of the antenna. Insert two carriage bolts from the front (see Figure 3-4)
to attach. Secure on the back with the lock washers and nuts (see Figure 3-5).
Figure 3-5. Attaching the “L” Bracket.
5. Re-check the dipole feed assembly for the proper polarity (see Figures 3-1 and 3-2).
6. Attach the feed on the front with two carriage bolts. Secure on the back with the lock washers and nuts
(see Figure 3-4),
7. Place the two mast clamps on the two U-bolts (see Figure 3-6). Fasten the U-bolts on the “L” bracket with
the four lock washers and nuts (see Figure 3-5).
Mast Clamp
24-DBI DIRECTIONAL ANTENNA
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Figure 3-6. Placing the Mast Clamps on the U-Bolts.
NOTE
By eliminating one mast clamp and U-bolt, the optional fixed tilt holes provide
elevation in 10-degree increments. We do not recommend this under high wind
conditions.
8. Use the flat plate washer on the adjustable tilt slot to secure the antenna to the required elevation.
Figure 3-7. Tilt Slot.
Mast clamp
Tilt Holes
U-Bolt
Tilt slot
1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746
© Copyright 2000. Black Box Corporation. All rights reserved.
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