Teletronics 2.4GHz 1 Watt SmartAmp User Manual

Copyright ©2003

By

Teletronics International, Inc.

Patent Pending

FCC NOTICES

Electronic Emission Notice:

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.

2. This device must accept any interference received, including interference that may cause undesired
operation.

FCC Radiation Exposure Statement:

This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment
when installed as directed. This equipment should be installed and operated with fix-mounted
antennas that are installed with a minimum of 2 meters of separation distance between the antenna
and all persons body during normal operation.

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 the copyright holder.

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Table of contents

1. General Product Description _________________________________________ 3

2. Background _______________________________________________________ 3

3. Major Parameters ___________________________________________________ 4

4. Salient Characteristics: _____________________________________________ 5

5. Installation: _______________________________________________________ 6

6. DC Power Injector Connections, Indicators and labels: ___________________ 7

7. Amplifier Connections, Indicators and Labels:___________________________ 7

8. Functioning: ______________________________________________________ 8

9. Summary: _________________________________________________________ 8

10. Specifications: ____________________________________________________ 8

Nominal Loss Characteristics For Different Cables _______________________ 9

11. Path Loss Calculation _____________________________________________ 10

Decibels-Watts conversion Table _____________________________________ 10

12. FCC Certified Systems ____________________________________________ 11

FCC ID: MFMSAMP24W _____________________________________________ 11

FCC ID: MFMSAMP24X _____________________________________________ 11

13. Limited Warranty

__________________________________________________12

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1. General Product Description

SMART Amplifier (SMARTAMP) is a new bi-directional antenna-mount amplifier
designed to match any advanced spread spectrum system, either direct
sequence or frequency hopping, to extend the operating range of wireless
equipment. It is provided in a wide range of frequencies, such as 900 MHz, 2400
MHz, or 5800 MHz. It works in Time-Division Duplex (TDD) mode that allows the
radio device to share the antenna in different time intervals. SMARTAMP
consists of an intelligent algorithm and Automatic Gain Controlled (AGC) circuits
to maintain the output power and prevent transmit signal saturation. The input
transmit power level is sensed by the Radio Frequency (RF) sensor and the gain
is automatically adjusted to minimize the signal distortion so that the desired
signal quality can be assured.

This product has a wide range of wireless applications in Wireless Local Area
Network (WLAN), Wireless Local Loop (WLL), Wireless Internet Access (WIA),
wireless modem connection with point-to-point, point-to-multipoint, where the
Time Division Duplex (TDD) technology is used.

2. Background

In wireless applications, when longer operating range is required, the add-on
antenna amplifier and DC injector set are often a choice. Because of different site
layout and hardware configuration, it is almost impossible for amplifier
manufacture to design the amplifier and fit all applications. Typically, in most
applications, the interconnection cable could have different length from a few feet
to a few hundred feet. The attenuation between DC injector and bi-directional
amplifier could be few dB to more than 20 dB. Also, different radio modems have
different output powers. Thus, the system installer must carefully measure the
input RF power at the antenna amplifier and specify the gain of the amplifier in
order to maintain the system performance. With different systems, different
amplifiers are required. With this invention, the major difference as compared to
other existing technology, is the “SMART function” - power level detection and
automatic gain control circuit. With SmartAmp, the gain can be intelligently adapt
to the input power level in a wide range and automatically further adjusted to
accommodate the cable and connectors loss, by however length and
configuration. The output power level is monitored and maintained intelligently;
hence the desired performance can be achieved in all hardware configurations
for TDD wireless applications irrespective of installation environment.

The table on the next page summarizes the difference between SMARTAMP and
other TDD antenna-mount amplifier product.

Page 3

Differences Between Smart Amp and Other TDD Amplifier

SMARTAMP Other TDD Amplifier

Transmit gain Intelligent self

Fixed

adjusted

Transmit power level Maintained Varies, depending on input

power level

Transmit signal distortion Minimized at all

time
Input power range
requirements

Wide range

accepted

Much worse at high input
power levels
Designed for narrow range
only

3. Major Parameters

Smart Amplifier fitted with a Low Noise amplifier (LNA) and together with its
unique bi-directional features is fully capable of enhancing the coverage area of

2.4 GHz radio signals by amplifying transmitted and received signals.
The Smart Amp ensures a seamless RF link in most installations with long cable
losses. Its unique outdoor design enables it to be mast mounted and to operate
in wide temperature range of –40 to +75 C.

2.5 mW (+4 dBm) input to the amplifier delivers 1Watt output. For signal
input values greater than 4 dBm the Smart Amplifier attenuates the signal
accordingly and keeps the output at 30 dBm. Up to 200 mW of power may
be safely applied directly to the amplifier input without causing any
damage.

The complete set includes:

1. An outdoor unit, the SmartAmp

2. DC injector

3. Universal power supply

4. Mounting hardware.

The DC injector carries the power along with RF signal to the outdoor unit via co­axial cable.

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4. Salient Characteristics:

• Complete One Year Warranty on parts and labor.

• Automatic gain control to minimize the signal distortion

• Wide Transmit input levels (2mW to 200mW)

• Low noise amplifier with system noise figure 3.5dB

• Universal 110/220VAC auto switching AC adapter for DC power injector

• Green LED on DC Injector for power.

• Bi-color LED on SmartAmp for transmit and receive.

• SmartAmp equipped with Lightening Protection if grounded properly.

• DC injector equipped with surge protection.

• Industry standard “N” Connectors on both ends.

• Outdoor weatherproof enclosure.

• Made in USA

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5. Installation:

The SmartAmp is a stand-alone unit designed for installation by professional radio installers.

Typical Installation:

As shown in the above diagram power is carried to the amplifier from DC Injector via RF cable.
The DC injector is an indoor unit and requires weather protection. The amplifier is installed at
the antenna pole (or mast) with the U-bolt assembly. It is a weatherproof unit and designed to
withstand the outdoor environment. Since the SmartAmp is built with lightening protection
circuitry, it is extremely important to ground the whole unit. A grounding cable can be tightened
directly to the U bolt. This would not only ground any lightening strike on the antenna but would
also relieve it from any static buildup in the environment during bad weather.

Once the unit is installed and tested, all the N connectors must be waterproofed with electric
tape or any other sealant.

Caution:

I. The RF cable between the DC Injector and the amplifier carries 12V DC

power, make sure it is NOT shorted to ground, OR DC Injector could be
permanently damaged.

II. If this cable is accidentally connected to “To Antenna” connector on the

Amplifier (since it has lightening protection with DC ground), the DC
Injector could be permanently damaged.

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6. DC Power Injector Connections, Indicators and labels:

The DC injector injects DC power into the RF cable and the power is carried to the amplifier
with the RF signal.

“To Radio” Connection:

This “N” Female connector is connected to the radio modem via a short jumper RF cable.

“To Amplifier” Connection:

This “N” Female connector connects to the amplifier on the mast via the transmission
cable.

LED: Green LED indicates DC power on.

DC Power Supply:

The power supply provided with the unit is universal type, 110/220 V AC to 9 VDC
converter. This has been tested for quality and performance. If a different 9V DC adapter
has to be used make sure it is provided with center positive 2.5mm jack and minimum of

1.2 Amp rated capacity.

7. Amplifier Connections, Indicators and Labels:

“TO DC Injector” Connection:

This “N” Female connector is connected to the DC Power Injector via the transmission
cable.

“TO Antenna” Connection:

This “N” Female connector connects to the antenna with a short length of coax cable.

LED:

This LED indicates three states:

1. Green = Transmit

2. Red = Receive

3. Orange = High speed Tx / Rx switching

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8. Functioning:

The unit operates automatically and no user adjustments are required.

This amplifier is designed for 2.4 GHz radios using Time Division Duplex (TDD) mode of
operation. It is equipped with a high speed Tx / Rx switch, that detects transmit signal and
switches to transmit mode within 600 ns. In the absence of any transmit signal the unit stays in
receive mode. If used with a radio devices using separate bands for transmit and receive in a
true full duplex mode, the amplifier would not work.

9. Summary:

This manual describes how SmartAmp as a product exploits the automatic gain control by
detecting the input power level, automatically adjusting its gain and maintaining the output
power to a specified level while minimizing the signal distortion and maximizing and
transmission distance. This product has a wide range of wireless applications in Wireless Local
Area Network (WLAN), Wireless Local Loop (WLL), Wireless Internet Access (WIA), wireless
modem connection with point-to-point, point-to-multipoint, where the Time Division Duplex
(TDD) technology is used.

Should you have any problems using it, call our service department at 301-309-8500.

10. Specifications:

Operating Range 2400 ~ 2500 MHz
Operating Mode Bi-directional TDD
Transmit Output Power +30 dBm ( 1Watt )
Transmit Input Power 3 dB min, 23 dB max
Transmit Gain Automatically adjusts up to 26 dB
Receive Gain 16 dB
Frequency Flatness

±1.0 dB
Noise Figure 3.5 dB
Lightening Protection Direct DC ground at antenna port
DC Surge Protection At 9 V DC input
LED indicators on Amp Tx: Green, Rx: Red
Operating Temperature

-40 °C ~ + 75 °C
Power Supply 9 V DC at 1.1 Amp
RF Connector Type N, Female

CAUTION: Do not exceed 200mW (+23 dBm) of input power to the amplifier.

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Antenna

Functional Block Diagram

Tx Power

Reader

Tx

Rx

Tx Amplifier

Variable

Attenuator

Rx Amplifier

Bandpass

Filter

Tx Power

Sensor

Tx

In

Rx

DC

Power

Supply

Nominal Loss Characteristics For Different Cables

(Decibels per hundred feet at 2.5 GHz)

LMR-400
LMR-500
LMR-600
LMR-900

LMR-1200

6.8 dB

5.5 dB

4.4 dB

3.0 dB

2.27 dB

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11. Path Loss Calculation

Loss = 32.44 + 20 log f + 20 log d [where f = frequency in MHz and d= distance in km]

System Gain = Po (Tx power) + Gt (Tx antenna gain) + Gr (Rx antenna gain) - Mf (fade margin) - Ms

(system margin) - Pr (minimum receive signal level)

Decibels-Watts conversion Table

DB mW DB Watts

0 1.0 31 1.3
1 1.3 32 1.6
2 1.6 33 2.0
3 2.0 34 2.5
4 2.5 35 3.2
5 3.2 36 4.0
6 4.0 37 5.0
7 5.0 38 6.3
8 6.3 39 7.9

9 7.9 40 10.0
10 10.0 41 12.6
11 12.6 42 15.8
12 15.8 43 20.0
13 20.0 44 25.1
14 25.1 45 31.6
15 31.6 46 39.8
16 39.8 47 50.1
17 50.1 48 63.1
18 63.1 49 79.4
19 79.4 50 100.0
20 100.0 51 125.9
21 125.9 52 158.5
22 158.5 53 199.5
23 199.5 54 251.2
24 251.2 55 316.2
25 316.2 56 398.1
26 398.1 57 501.2
27 501.2 58 631.0
28 631.0 59 794.3
29 794.3 60 1000.0
30 1000.0 61 1258.9

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12. FCC Certified Systems

FCC ID: MFMSAMP24W

Radio: Cisco 352
Antenna: As shown in the table 1
Amplifier: Smartamp2400-1.0 (outdoor version)

Antenna Type Gain

(dBi)

ANT-O2405 5 3’ 200 feet 300’ Point to Multi Point
ANT-O2408 8 10’ 200 feet 300’ Point to Multi Point
ANT-P2412 12 10’ 200 feet 300’ Point to Point
ANT-G2418 18 3’ 200 feet 300’ Point to Point

Radio: Cisco 352
Antenna: As shown in the table 1
Amplifier: Smartamp2400-1.0 (indoor version)

Antenna Type Gain

(dBi)

ANT-O2405 5 25’ 200 feet 300’ Point to Multi Point
ANT-O2408 8 25’ 200 feet 300’ Point to Multi Point
ANT-P2412 12 25’ 200 feet 300’ Point to Point

Min. Cable

Length

LMR400

FCC ID: MFMSAMP24X

Min. Cable

Length

LMR400

Max. Cable

Length

LMR400

Max. Cable

Length

LMR400

Max Cable
Length
LMR600

Max Cable
Length
LMR600

Point to Point/
Point to Multi Point

Point to Point/
Point to Multi Point

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13. Limited Warranty

The SmartAmp is warranted to the original purchaser to be free from defects in materials and
workmanship under normal installation, use, and service for a period of one (1) year from the
date of purchase.

Under this warranty, Teletronics International, Inc. shall repair or replace (at its option), during
the warranty period, any part that proves to be defective in material of workmanship under
normal installation, use and service, provided the product is returned to Teletronics
International, Inc., or to one of its distributors with transportation charges prepaid. Returned
products must include a copy of the purchase receipt. In the absence of a purchase receipt,
the warranty period shall be one (1) year from the date of manufacture.

This warranty shall be voided if the product is damaged as a result of defacement, misuse,
abuse, neglect, accident, destruction or alteration of the serial number, improper electrical
voltages or currents, repair, alteration or maintenance by any person or party other than a
Teletronics International, Inc. employee or authorized service facility, or any use in violation of
instructions furnished by Teletronics International, Inc.

This warranty is also rendered invalid if this product is removed from the country in which it
was purchased, if it is used in a country in which it is not registered for use, or if it is used in a
country for which it was not designed. Due to variations in communications laws, this product
may be illegal for use in some countries. Teletronics International, Inc. assumes no
responsibility for damages or penalties incurred resulting from the use of this product in a
manner or location other than that for which it is intended.

IN NO EVENT SHALL TELETRONICS INTERNATIONAL, INC. BE LIABLE FOR ANY
SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR BREACH OF THIS OR ANY
OTHER WARRANTY, EXPRESSED OR IMPLIED, WHATSOEVER.

Some states do not allow the exclusion or limitation of special, incidental or consequential
damages, so the above exclusion or limitation may not apply to you.

This warranty gives you specific legal rights, and you may also have other rights that vary from
state to state.

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