YDI Wireless C111E User Manual

Model AMP2440

MODEL AMP2440

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POLE MOUNTED BI-DIRECTIONAL

REMOTE BI-DIRECTIONAL POWER

POWER AMPLIFIERS FOR 2.4 GHz

AMPLIFIERS FOR 2.4 GHz

Installation and

Installation and

Operation Manual

Operation Manual

Ver 2.3 Jan 2001

Version 2.0 May 2000

Young Design Inc 146B Hillwood Ave. Falls Church, VA 22046

Tel: [phone] Fax: [phone]

http://www.ydi.com

Limited Warranty

Young Design, Inc. (YDI) warrants that your device is free of defects in material and
workmanship for a period of one year after initial purchase. YDI will, in this period of time,
repair or replace, any YDI product returned to the factory, freight prepaid.

The YDI warranty covers repairs or replacement (at YDI’s option) of the product only. YDI is
not responsible for the cost of removal, reinstallation, or shipping to the place of repair. YDI
does not extend or modify its warranty period as a result of repair or replacement.

YDI reserves the right to void a warranty and/or make reasonable charges for the repair of a
unit if the warranty seal is broken or the unit displays evidence of misuse, abuse, or
tampering.

YDI is not responsible for damage to any other equipment or property, or any other
consequential or incidental damages of any kind, whether based on contract, negligence, or
strict liability. Maximum liability shall not in any case exceed the purchase price of the unit.

Warranties give you (the buyer) specific legal rights. You may also have other rights that
vary from state to state. This warranty is only extended to purchases made in the United
States of America or its possessions.

Warranty Notice

The AMP2440 warranty is null and void if any of the following occurs:

1. The amplifier is opened

2. The antenna connections are not properly waterproofed

3. The amplifier is operated with no antenna attached

4. Improper connectors are used

5. The amplifier is mounted outdoors with the connectors facing any direction except
downwards

This device complies with part 15 of the FCC rules. Operation is subject to the
following two conditions: (1) This device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that
may cause undesired operation.

© 2000 Young Design, Inc. All Rights Reserved. No part or parts of this document may be
reproduced, translated, stored in any electronic retrieval system, or transmitted, in any form
or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the
prior written permission of Young Design, Inc.

TABLE OF CONTENTS

1. DESCRIPTION............................................................................................................1

2. AMPLIFIER FEA TURES............................................................................................1

2.1 GENERAL SPECIFICATIONS...............................................................................2

3. AMPLIFIER KIT ..........................................................................................................3

4. INSTALLA TION AND CABLING INSTRUCTIONS...........................................3

5. AMPLIFIER CONNECTIONS AND INDICA TORS.............................................5

6. DC POWER INJECTOR OPERA TION..................................................................5

7. DC POWER INJECTOR CONNECTIONS AND INDICA TORS.......................6

8. POWER SUPPL Y ........................................................................................................6

9. OPERA TION................................................................................................................7

TABLE A - CONVERSIONS FROM DBM TO WA TTS...........................................8

TABLE B - TYPICAL CABLE ATTENUA TION VALUES........................................8

TABLE C - TYPICAL AMPLIFIER INST ALLATION DET AILS.............................9

APPENDIX A: CALCULA TING POWER..................................................................10

APPENDIX B: FCC PA RT 15 CERTIFIED SYSTEMS............................................1 1

Professional Installation Required

The amplifier and antennas used must be professionally installed by experienced antenna
installation professionals who are familiar with RF issues (such as gains and losses) as well
as local building and safety codes. Failure to do so will void the product warranty and may
expose the end user to excessive Radio Frequency hazard. Regulations regarding maximum
antenna gains, amplifier power gain, and maximum permissible exposure vary from country to
country. It is the responsibility of the end user to operate within the limits of these regulations
and to ensure that the professional installers who install this device are aware of these
regulations. All antennas are intended to be installed outdoors.

1. Description

The AMP2440 is a bi-directional amplifier designed for extending the range of 2.4 GHz
wireless radio modems, Wireless LAN cards, Access Points and wireless bridges. The
units provide transmit power amplification as well as receive signal gain. The amplifier is
installed right at the antenna’s feed point, providing maximum effectiveness of transmit
power. This has the effect of compensating for signal loss in the transmitter cable to the
antenna. Likewise, the Low Noise Amplifier (LNA) in the AMP2440 boosts the receive
signal right at the antenna prior to experiencing the loss in the transmission cable to the
radio. This gain completely overcomes the losses in the transmission cable between the
amplifier and the radio. This results in the lowest possible system Noise Figure. In fact,
use of the amp will actually increase the receiver sensitivity by a few dB! The ultimate
result is the best receiver sensitivity and maximum possible range for whatever antenna
is used.

The amplifier box is weatherproof and can be bolted to the antenna mast or tower leg
using the U-bolt included. When properly installed, the connectors face down so that
gravity will drain all water away from the amplifier enclosure. This will prevent water
from settling on the face of the unit. The LEDs will also be facing downward so that they
can be checked for operation from the bottom of the mast or tower.

DC Power to the amplifier is supplied through the transmission cable that carries the RF
(Radio Frequency) signal. This DC voltage is put on the coax cable using the DC Power
Injector included in the amplifier kit. Both the amplifier and the DC Injector also contain
their own integral lightning protection as well as DC surge protection. No external
antenna lightning protection on the coax cable is required. (The DC Injector has a
grounding stud to facilitate an easy connection to a good earth ground.) It also has
mounting flanges to facilitate permanent installation to a bulkhead or wall. If mounted to a
grounded metal plate, then no extra wiring needs to be attached to the grounding stud.
The amplifier box will provide maximum lightning protection when it is bolted to a grounded
mast or tower. No extra ground straps need to be connected to the amplifier case.

2. Amplifier Features:

• Transmit input levels from 3mW to 100mW

• 14 dB transmitter power gain (Standard amp)

• 16 dB receive gain

• RX preamp noise figure better then 4 dB (typical)

• Weatherproof Cast Aluminum Case that is mast mountable

• DC Power for the amp carried up through the transmission cable

• Power and Transmit LEDs on both the amp and the DC power injector

• Built-in Lightning Protection

• DC Surge Protection

• Heavy Duty N-type Connectors

• One Year Warranty

• Made in the U.S.A.

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2.1 General Specifications

Operating Range:

Operating Mode:

Connectors:

Indicators:

Lightning

Protection:

DC Surge

Protection:

Transmit Gain:

Freq Response:

Transmit Output

Power:

Duty Cycle:

Transmit Input

Power to Amp:

2400-2483 MHz
Bi-directional, half-duplex. Senses RF

carrier from transmitter and
automatically switches from receive to
transmit mode.

N-female
TX and RX LEDs on both the amplifier

and the DC bias injector
Direct DC ground at antenna connector.

DC injector serves as lightning arrestor
if properly grounded.

600 Watt TVS at 12 VDC input from
transmis

Transmitter Amplifier

14 dB nominal for standard amp
(Other versions may have different gains)

+/-1 dB over operating range

250 mW nominal
Up to 640 mW for FHSS radios
Up to 400 mW for DSSS radios

50% Maximum

3mW minimum (+5dBm),
100mW (20 dBm) maximum
(Special versions are available with higher
input power.)

Receiver Low Noise Amplifier (LNA)

Receive Gain:

Freq Response:

Noise Figure:

16 dB nominal
+/-1 dB over operating range

4 dB typical

Mechanical, Power and Environmental

Operating

Temperature:

Dimensions:

Mounting Bracket

for amplifier:

Kit Weight:

-20°C to +60°C

Power:

105-240 VAC if using the power
supply provided with the amp kit
or
11 – 14 VDC @ 900 ma peak,
400 ma avg. with an alternate
power source

Amplifier:

4.5” x 2.6” x 1.2 ”

DC Power injector:

X 2.4” X 1.3 ”

5.4”
Accommodates pole/mast

diameters
from 3/4” to 3”

Approx. 1.5 lb. with U-bolts

Model 2440 Functional Block Diagram

View showing the DC Injector and the
pole mounted outdoor amplifier
attached to its mounting bracket.

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3. Amplifier Kit

Each Amplifier Kit Includes:

• Bi-directional remote mounted amplifier

• DC Power Injector

• 12 VDC, 110/220 VAC Power Supply

• Stainless Steel U-Bolts and mounting

bracket for amp

• Installation Manual

The following options are also available and must be ordered separately:

Close up of the bracket and mounting
hardware attached to the amplifier.

IMPORTANT:

Only mount the
amplifier with the
connectors facing
downward. Do not
mount it with the
connectors facing
sideways or upwards.

CAB-DC

DUAL-DC

DC-2.1-2.1

DC-2.1-2.5

DC power cable with 2.1mm plug to flying lead 3 feet long. Used when the
customer provides their own 12 VDC power for the DC injector or amp.

Option to add second power jack on DC injector to enable one 12 VDC PS
that comes with the amp to power both the Injector and the radio or AP.
(Requires a DC jumper cable. See below).

DC jumper cable that connects a radio modem or Access Point to the
second DC power jack on the DC injector box. Radio devices must have a

2.1 mm ID power jack and operate on 12VDC.
Same as above except used for radios and Access Points that have a 2.5

mm ID barrel jack on them.

4. Installation and Cabling Instructions

FCC Notice

To comply with FCC part 15 rules, the proper version of the amp must only be used in systems
that have been FCC certified. The system must also be professionally installed to ensure
compliance with the Part 15 certification. It is the resposibility of the professional installer to
ensure that certified systems be deployed in the United States (or where FCC rules apply).
The use of the amplifier in any other combination (such as co-located antennas transmitting
the same information) is expressly forbidden in accordance with FCC rules CFR47 part

15.204. Please visit our web site (www.ydi.com) to see the systems currently certified by the
FCC.

Several key factors unique to their particular installation determine the power level at the input
of the amplifier. The most important consideration is the cable loss in the transmission cable
between the radio and the pole mounted amp. It is important that the installer understand these
and other factors when installing the system.

If you are not familiar with determining power levels within the transmission system, YDI
engineers will assist you in planning your system including selecting the proper cable and
antenna required.

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