Allied Telesis AT-WA7500 User guide

Antenna and Cable
Application Guide for the
AT-WA7500 and
AT-WL2411 Access Points
______________________________________________________________________________________
PN 613-50537-00 Rev A 1

______________________________________________________________________________________
PN 613-50537-00 Rev A 2
Table of Contents
Introduction 4
Regulatory Concerns 4
Basic Antenna Concepts 6
Radiation Patterns of Various Antennas 6
Typical Installations
Direct Connection Antenna Circuits 7
Direct Connection Antenna Connection 7
Antenna Circuits with Splitter 7
Antenna Circuits with Splitter 7
Antenna Circuits with Splitter and Lightning Suppressors 9
Antenna Circuits with Splitter and Lightning Suppressors 9
Plenum Cable Cross Reference 10
Cable Assemblies
AT-INT067265-00 - TNC Plug / N Receptacle, 12 inch 11
AT-INT67266-00 - TNC Plug / N Plug, 24 inch 12
AT-INT071178-00 - TNC Plug / N Plug, 12 feet 12
AT-INT072822-00 - TNC Plug/ N Plug, 24 inch 12
AT-INT072823-00 - TNC Plug/ N Plug, 12 feet 12
AT-INT064616-00 - N Plug / N Plug, 30 inch 13
AT-INT063245-00 - N Plug / N Plug, 60 inch 13
AT-INT063246-00 - N Plug / N Plug, 20 feet 13
AT-INT71179-00 - N Plug / N Plug, 30 feet 13
AT-INT072824-00 - N Plug / N Plug, 30 inch 13
AT-INT072825-00 - N Plug / N Plug, 5 feet 13
AT-INT072826-00 - N Plug / N Plug, 20 feet 13
AT-INT072827-00 - N Plug / N Plug, 30 feet 13
AT-INT069886-00 - MMCX / N Receptacle 14
AT-INT069887-00 - Radiall (Lucent) / N Receptacle 15
AT-INT070402-00 - MMCX / N Plug 16
AT-INT070403-00 - Radiall (Lucent) / N Plug 17
Antennas
2.4 GHz 18-33
2.4 GHz Antennas
AT-INT63363-00 - Antenna, 2.4 GHz, Omni 18
AT-INT063365-00 - Antenna, 2.4 GHz, Yagi 19
AT-INT63366-00 - Antenna, 2.4 GHz, Flat Panel 20
AT-INT065349-00 - Antenna, 2.4 GHz, 9DBI, Omni 21
AT-INT066147-00 - Antenna, TNC, 2.4 GHz, Dipole 22
AT-INT067261-00 - Antenna, 2.4 GHz, 3DBI, Mini Omni
(N Recept Conn) 23, 24
AT-INT070140-00 - Antenna, 2.4 GHz, 3DBI,
Mini Omni (MMCX Conn) 23, 25
AT-INT070141-00 - Antenna, 2.4 GHz, 3DBI,
Mini Omni, (Radiall Conn) 23, 26
AT-INT067262-00 - Antenna, 2.4 GHz, 5DBI, Dual Flat Panel 27

______________________________________________________________________________________
PN 613-50537-00 Rev A 3
Table of Contents (cont.)
AT-INT067263-00 - Antenna, 2.4 GHz, 9DBI, Flat Panel 28
AT-INT067263-00 - Rear View 29
AT-INT71121-00 - Antenna, 2.4 GHz, Diversity, 3DBI 31
AT-INT71122-00 - Antenna, 2.4 GHz, Corner Reflect 32
AT-INT71488-00 - Diversity Antenna, 2.4 GHz (MMCX Conn) 33
AT-INT71489-00 - Diversity Antenna, 2.4 GHz (Radiall Conn) 33
N Receptacle used on various antennas 25
5.25 – 5.35 GHz (Mid-Band) 34-38
AT-INT072730-00 - Antenna, 5.25 – 5.35 GHz, Omni,
Swivel TNC, 4 DBI 34
AT-INT072759-00 - Antenna, 5.25 – 5.35 GHz, Omni, 6 DBI 35
AT-INT072760-00 - Antenna, 5.25 – 5.35 GHz, Omni, 9 DBI 36
AT-INT072761-00 - Antenna, 5.25 – 5.35 GHz, Omni, 3 DBI,
Ceiling Mount 37
AT-INT072762-00 - Antenna, 5.25 – 5.35 GHz, Corner Reflect 38
Accessories
AT-INT069888-00 - Kit, Bracket, Mounting, Antenna 39
AT-INT069893-00 - Kit, Power Supply Holder 40
AT-INT061868-00 - Lightning Suppressor 40

______________________________________________________________________________________
PN 613-50537-00 Rev A 4
Introduction
The purpose of this document is to provide Allied Telesyn, Inc. personnel a tool which will enable them to
better understand how the various Allied Telesyn antennas, cable assemblies, and accessories blend
together.
Regulatory Concerns
Note: The information below will help you to understand some of the regulatory issues surrounding the
use of antenna, antenna circuits, and radios. However, it is critical to remember that all antennas must be
approved and certified before they can be used with radio (RF) equipment purchased from Allied Telesyn.
FCC
FCC requirements limit the total output power of a wireless LAN system operating in 2.4 GHz frequency
ranges to 4 Watts. This limit is expressed in EIRP, which stand for “Effective Isotropically Radiated
Power.” This is the total power created by the transmitter and gain generated by the antenna, minus any
loss due to cabling and connections. Given this 4W (4000 mW) maximum, the EIRP must not exceed
36dBi.
ETSI
ETSI requirements limit the total output power of a 2.4 GHz wireless LAN system to 0.1 Watt (100 mW).
Given this 100 mW maximum, the EIRP must not exceed 20dBm. Most European countries such as France
and Italy operate under a lower power directive, which limits them to a maximum output limit of 10 mW.
Non-ETSI & Non-FCC Countries
Electromagnetic-transmission regulations are mandated by each country’s own governing body. Many
countries follow the directives issued by ETSI or the FCC but others create their own regulations.
Before adding radios or antennas to a RF system, please consult a certified Allied
Telesyn Systems Consultant operating in the country where the system will be used.

______________________________________________________________________________________
PN 613-50537-00 Rev A 5
Basic Antenna Concepts
Antennas and Power
Antennas do not increase nor decrease the power applied to them. They can only transmit or receive the
amount of power that is applied to them. It is possible to have some power loss before or after the signal
leaves the antenna. An example of this is “line loss: which is a decrease in power due to imperfect
connections and imperfect conductivity to cabling materials. It is, however, possible to increase the power
output in a certain direction. But the total power emitted will always be the same as the amount applied to
the antenna minus the amount lost due to line loss, ohmic loss, reflection loss etc…
dBi – (decibels relative to an isotropic {spherical} radiation pattern)
An isotropic antenna is a theoretical antenna that radiates in the shape of a perfect sphere.
dBm – (decibels relative to one milliwatt)
dBm is a commonly used unit of measurement in the RF industry that expresses radio frequency power
relative to a 1 mW point of reference.
dBd – (decibels relative to a ½ wave dipole antenna)
dBd is gain with respect to a ½ wave dipole antenna. Some commercial antenna companies use dBd to rate
their antennas.
EIRP – (Effective isotropically radiated power)
The mathematical product of (1) the power supplied to the antenna and (2) its gain.
Gain
Gain is given in dB (decibels). If an “I” is added as in 3dBi, this rating is relative to an “isotropic” antenna.
An isotropic antenna is a theoretical antenna that radiates in the shape of a perfect sphere. If a “d” is added
as in 3dBd, this rating is relative to a “dipole” antenna. A dipole antenna with a rating of 2.14dB is
equivalent to a 0dBd antenna.
Line-of-sight
This refers to the fact that some electromagnetic wave frequencies require a clear line of sight between
transmitter and receiver. This is largely because higher frequency electromagnetic waves, such as those in
the 2.4 GHz range, do not bend around or penetrate objects as well as some lower frequency signals.
Multipath, Reflection, or Physical Interference
Because of the electromagnetic properties of waves used to transmit data, large metal objects in the
immediate transmission path of the antenna will likely cause distortion of the signal and should therefore be
avoided.
Omnidirectional
An omnidirectional antenna radiates evenly horizontally around the antenna in a plane parallel to the earth.
These antennas do not always radiate evenly vertically around the antenna in a plane perpendicular to the
earth. By giving up vertical coverage, above and or below the antenna and refocusing that signal around
the antenna, it is possible to achieve gain with an omnidirectional antenna.
Omni-gain
Wavelength and operating frequency determine the size of the antenna. By using a longer antenna, you do
not achieve greater overall coverage, but you can achieve greater distance in a focused direction. For
example, omnidirectional antennas with gain achieve some measure of gain in the horizontal plane.

R
adiation Patters of Various Antennas
O
mnidirectional:
C
ircular patter in open spaces
R
ange is slightly effected by antenna gain but the radiation pattern will
r
emain relatively circular.
F
lat Panel:
M
odest directional coverage with a slight backlobe
T
he main lobe of the radiation pattern can be from almost circular to fairly
o
blong in shape. Good for slightly directional coverage such as down
c
orridor or away from walls.
D
ual Flat Panel:
B
i-directional coverage
G
ood for transmission down two opposing directions of a corridor.
D
irectionalYAGI (High Gain):
H
ighly focused signal.
G
ood for wireless bridging or very specialized coverage.
T
here must always be a tradeoff between gain and coverage area. As can be
s
een in the radiation patterns presented, the higher the gain (directional
d
istance) as with theYagi antenna, the narrower the coverage.And
c
onversely, the lower the gain, the more universal the coverage about the
a
ntenna's axis.
Antenna patterns are 3
dimensional. The radiation
patterns (above) are views
of the azimuth plain, which
is a top down view.
______________________________________________________________________________________
PN 613-50537-00 Rev A 6

WA7500
Direct ConnectionAntenna Circuit
AnyAlliedTelesyn 2.4 GHz, or 5.3 GHz (Mid-Band)
Antenna with N Receptacle Connector
WA7500
067266 - Cable - 2' (61cm) -- New Part #:AT-INT67266-00
071178 - Cable - 12" (366cm) -- New Part #: AT-INT71178-00
*See Table on page 12 for plenum cable cross reference.
2
.4 GHz and 5.3 GHz (Mid-Band).
WL2411
Connection Antenna Circuit
WL2411
Any AlliedTelesyn 2.4 GHz Antenna
with N Receptacle Connector
070402 - Cable - MMCX -- New Part #: AT-INT70402-00
070403 - Cable - Radiall -- New Part #: AT-INT70403-00
069888 - Kit, Bracket, Mtg -- New Part #:AT-INT6988-00
070140 - Antenna, 3dBi Mini Omni, MMCX -- New Part #:AT-INT70140-00
070141 - Antenna, 3dBi Mini Omni, Radiall (Lucent) -- New Part #:AT-INT70141-
00
071488 - Diversity Antenna, MMCX -- New Part #:AT-INT71488-00
071489 - Diversity Antenna, Radiall (Lucent) -- New Part #:AT-INT71489-00
______________________________________________________________________________________
PN 613-50537-00 Rev A 7

WA7500 Direct Circuit with Splitter
Any AlliedTelesyn 2.4 GHz, or 5.3 GHz (Mid-Band) Antenna with N Receptacle Connector
WA7500
WA7500 Support 2.4 GHz and 5.3GHz (Mid-Band).
Splitter
AT-INT63198-00 - Splitter, 2.4 GHz
AT-INT67265-00 - Adapter cable 1' (30cm)
AT-INT064616-00 - Cable - 2.5' (76cm) AT-INT063245-00 - Cable - 5' (152cm) AT-INT063246-00 - Cable - 20' (610cm) AT-INT71179-00 - Cable - 30' (914cm)
AT-INT064616-00 - Cable - 2.5' (76cm) AT-INT063245-00 - Cable - 5' (152cm) AT-INT063246-00 - Cable - 20' (610cm) AT-INT71179-00 - Cable - 30' (914cm)
* See Table on page 12 for plenum cable cross reference
WL2411 2.4 GHz Antenna Circuit with Splitter
WL2411
Any AlliedTelesyn 2.4 GHz Antenna with N Receptacle Connector
Splitter
AT-INT064616-00 - Cable - 2.5' (76cm) AT-INT063245-00 - Cable - 5' (152cm) AT-INT063246-00 - Cable - 20' (610cm) AT-INT71179-00 - Cable - 30' (914cm)
AT-INT064616-00 - Cable - 2.5' (76cm) AT-INT063245-00 - Cable - 5' (152cm) AT-INT063246-00 - Cable - 20' (610cm) AT-INT71179-00 - Cable - 30' (914cm)
AT-INT63198-00 - Splitter, 2.4 GHz
AT-INT069886-00 - Cable - MMCX AT-INT069887-00 - Cable - Radiall AT-INT069888-00 - Kit, Bracket, Mtg
______________________________________________________________________________________
PN 613-50537-00 Rev A 8

______________________________________________________________________________________
PN 613-50537-00 Rev A 9
WA7500 2.4 GHz / 5.3 GHz (Mid-Band) Antenna Circuit with Splitter and Lightning Arrestor
Any AlliedTelesyn 2.4 GHz, or 5.3 GHz (Mid-Band) Antenna with N Receptacle Connector
WA7500
WA7500 Support 2.4 GHz and 5.3 GHz (Mid-Band).
Splitter
AT-INT63198-00 - Splitter, 2.4 GHz
AT-INT67265-00 - Adapter cable 1' (30cm)
AT-INT064616-00 - Cable - 2.5' (76cm) AT-INT063245-00 - Cable - 5' (152cm) AT-INT063246-00 - Cable - 20' (610cm) AT-INT71179-00 - Cable - 30' (914cm)
AT-INT064616-00 - Cable - 2.5' (76cm) AT-INT063245-00 - Cable - 5' (152cm) AT-INT063246-00 - Cable - 20' (610cm) AT-INT71179-00 - Cable - 30' (914cm)
AT-INT064616-00 - Cable - 2.5' (76cm) AT-INT063245-00 - Cable - 5' (152cm) AT-INT063246-00 - Cable - 20' (610cm) AT-INT71179-00 - Cable - 30' (914cm)
AT-INT61868-00 - Lightning Suppressor AT-INT58661-00 - Capsule
* See Table on page 12 for plenum cable cross reference
2101 / 2102 2.4 GHz Antenna Circuit with Splitter and Lightning Suppressor
WL2411
Any AlliedTelesyn 2.4 GHz Antenna with N Receptacle Connector
Splitter
AT-INT064616-00 - Cable - 2.5' (76cm) AT-INT063245-00 - Cable - 5' (152cm) AT-INT063246-00 - Cable - 20' (610cm) AT-INT71179-00 - Cable - 30' (914cm)
AT-INT064616-00 - Cable - 2.5' (76cm) AT-INT063245-00 - Cable - 5' (152cm) AT-INT063246-00 - Cable - 20' (610cm) AT-INT71179-00 - Cable - 30' (914cm)
AT-INT63198-00 - Splitter, 2.4 GHz
AT-INT069886-00 - Cable - MMCX AT-INT069887-00 - Cable - Radiall AT-INT069888-00 - Kit, Bracket, Mtg
AT-INT61868-00 - Lightning Suppressor AT-INT58661-00 - Capsule
AT-INT064616-00 - Cable - 2.5' (76cm) AT-INT063245-00 - Cable - 5' (152cm) AT-INT063246-00 - Cable - 20' (610cm) AT-INT71179-00 - Cable - 30' (914cm)

______________________________________________________________________________________
PN 613-50537-00 Rev A 10
Plenum Cable Cross Reference
Description Plenum Cable Assembly Part
Number Cable Assembly Length
TNC Plug / N
Receptacle AT-INT072821-00 12 Inches
TNC Plug / N Plug AT-INT072822-00 24 Inches
TNC Plug / N Plug AT-INT072823-00 12 Feet
N Plug / N Plug AT-INT072824-00 30 Inches
N Plug / N Plug AT-INT072825-00 5 Feet
N Plug / N Plug AT-INT072826-00 20 Feet
N Plug / N Plug AT-INT072827-00 30 Feet
* Recommended cable assembly for plenum applications