YDI Wireless A2400S Revised Manual
Version 2.4 July, 2001
2000, 2001 Young Design, Inc All Rights Reserved. No part or parts of this document may be reproduced,
anical,
This device complies with part 15 of the FCC rules. Operation is subject to the following
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 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 connect ions 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.
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.
©©
translated, stored in any electronic retrieval system, or transmitted, in any form or by any means, electronic, mech
photocopying, recording, or otherwise, without the prior written permission Young Design, Inc.
Important FCC Notice
TABLE OF CONTENTS
1. DESCRIPTION.........................................................................................................................................................................1
2. AMPLIFIER FEATURES...............................................................................................................................................1
2.1 GENERAL SPECIFI CATIONS............................................................................................................................2
3. AMPLIFIER KIT.....................................................................................................................................................................3
4. INSTALLATION AND CABLING INSTRUCTIONS.........................................................................3
5. AMPLIFIER CONNECTIONS AND INDICATORS.............................................................................5
6. DC POWER INJECTOR OPERATION ..........................................................................................................5
7. DC POWER INJECTOR CONNECTIONS AND INDICATORS.........................................6
8. POWER SUPPLY..................................................................................................................................................................6
9. OPERATION...............................................................................................................................................................................7
TABLE A - CONVERSION S FROM DBM TO WATTS........................................................................9
TABLE B - TYPICAL CA BLE ATTENUATION VALUES.................................................................9
APPENDIX A: CALCULATING POWER .........................................................................................................10
APPENDIX B: FCC PAR T 15 CERTIFIED SYSTEMS.....................................................................11
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
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 Ubolt 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 need 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 Lightening Protection
• DC Surge Protection
• Heavy Duty N-type Connectors
• One Year Warranty
• Made in the U.S.A.
2
2.1 General Specifications
)
Operating
Range: 2400-2483 MHz
Operating
Mode:
Connectors: N-female
Indicators: TX and RX LEDs on both the amplifier
Lightning
Protection: Direct DC ground at antenna connector.
DC Surge
Protection: 600 Watt TVS at 12 VDC input from
Transmit Gain: 14 dB nominal for standard amp
Freq
Response:
Transmit
Output Power:
Duty Cycle:
Transmit Input
Power to Amp:
Model 2440 Functional Block Diagram
Bi-directional, half-duplex. Senses RF
carrier from transmitter and automatically
switches from receive to transmit mode.
and the DC bias injector
DC injector serves as lightning arrestor if
properly grounded.
transmission cable
Transmitter Amplifier
(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 v ersions are available with higher
input power).
Receiver Low Noise Amplifier (LNA
Receive Gain: 16 dB nominal
Freq Response: +/-1 dB over operat ing range
Noise Figure: 2.8 dB typical, 3.8 dB max at room temp.
Mechanical, Power and Environmental
Operating
Temperature:
Power: 105-240 VAC if using the power supply
Dimensions: Amplifier:
20°C to +60°C
provided with the amp kit
or
11 - 14 VDC @ 900 ma peak, 400 ma avg.
with an alternate power source
4.5” x 2.6” x 1.2 ”
DC Power injector:
5.4” x 2.4” x 1.3 ”
Mounting Bracket
for amplifier: Accommodates pole/mast diameters from
3/4” to 3”
Kit Weight: Approx. 1.5 lb. with U-bolts
View showing the DC Injector and the pole
mounted outdoor amplifier attached to its
mounting bracket.
3
3. Amplifier Kit
IMPORTANT:
downward. Do not
Each Amplifier Kit Includes:
Only mount the
amplifier with the
connectors facing
• Bi-directional remote mounted
amplifier
• DC Power Injector
• 12 VDC, 110/220 VAC Power Supply
• Stainless Steel U-Bolts and mounting
mount it with the
connectors facing
sideways or
upwards.
bracket for amp
• Installation Manual
Close up of the bracket and mounting
hardware attached to the amplifier.
The following options are also available and must be ordered separately:
CAB-DC 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.
Dual-DC 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-2.1-2.1 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.
DC-2.1-2.5 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
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 responsibility 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.
FCC Notice
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