Edimax EW-7317LD User Manual

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User’s Manual

Version: 1.0

(Dec 2005)

COPYRIGHT

Copyright © 2004/2005 by this company. All rights reserved. No part of this
publication may be reproduced, transmitted, transcribed, stored in a retrieval
system, or translated into any language or computer language, in any form or
by any means, electronic, mechanical, magnetic, optical, chemical, manual or
otherwise, without the prior written permission of this company

This company makes no representations or warranties, either express ed or
implied, with respect to the contents hereof and specifically disclaims any
warranties, merchantability or fitness for any particular purpose. Any software
described in this manual is sold or licensed "as is". Should the programs
prove defective following their purchase, the buyer (and not this company, its
distributor, or its dealer) assumes the entire cost of all necessary servicing,
repair, and any incidental or consequential damages resulting from any defect
in the software. Further, this company reserves the right to revise this
publication and to make changes from time to time in the contents hereof
without obligation to notify any person of such revision or changes.

All brand and product names mentioned in this manual are trademarks and/or registered
trademarks of their respective holders.

Federal Communication Commission

Interference Statement

This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to Part 15 of FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one or
more of the following measures:

1. Reorient or relocate the receiving antenna.

2. Increase the separation between the equipment and receiver.

3. Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.

4. Consult the dealer or an experienced radio technician for help.

FCC Caution

This equipment must be installed and operated in accordance with provided
instructions and a minimum 5 cm spacing must be provided between
computer mounted antenna and person’s body (excluding extremities of
hands, wrist and feet) during wireless modes of operation.

This device complies with Part 15 of the FCC Rules. Operat ion 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.

Any changes or modifications not expressly approved by the party responsible
for compliance could void the authority to operate equipment.

R&TTE Compliance Statement

This equipment complies with all the requirements of DIRECTIVE 1999/5/CE
OF THE EUROPEAN PARLIAMENT AND THE COUNCIL of March 9, 1999 on
radio equipment and telecommunication terminal Equipment and the mutual
recognition of their conformity (R&TTE)

The R&TTE Directive repeals and replaces in the directive 98/13/EEC
(Telecommunications Terminal Equipment and Satellite Earth Station
Equipment) As of April 8, 2000.

Safety

This equipment is designed with the utmost care for the safety of those who
install and use it. However, special attention must be paid t o the dangers of
electric shock and static electricity when working with electrical equipment. All
guidelines of this and of the computer manufacture must therefore be allowed
at all times to ensure the safe use of the equipment.

EU Countries Intended for Use

The ETSI version of this device is intended for home and office use in Austria,
Belgium, Denmark, Finland, France, Germany, Greece, Ireland, Italy,
Luxembourg, the Netherlands, Portugal, Spain, Sweden, and the United
Kingdom.
The ETSI version of this device is also authorized for use in EFTA member
states: Iceland, Liechtenstein, Norway, and Switzerland.

EU Countries Not intended for use

None.

CONTENTS

1 INTRODUCTION .............................................................................1

1.1 FEATURES .................................................................................................... 1

1.2 SPECIFICATIONS............................................................................................ 1

1.3 PACKAGE CONTENTS..................................................................................... 1

2 THE OUTWARD APPEARANCE OF THE WI-FI DETECTOR ...2

3 HOW TO CHARGE THE WI-FI DETECTOR................................3

4 HOW TO USE THE WI-FI DETECTOR.........................................4

5 APPENDIX .......................................................................................6

1

1 Introduction

Thank you for purchasing this 802.11b/g Wi-Fi Detector. This convenient device in stantly
detects wireless hotspots anywhere. The backlightt LCM display tells the user detailed
information about any detected hotspot. There’s no need to purchase any battery because
there is a rechargeable Li-Polymer battery which recharges whenever the detector is
inserted into any USB port.

1.1 Features

• Complies with the IEEE 802.11b and IEEE 802.11g 2.4GHz standards.

• LCM displays: SSID, Signal Strength, Network type (802.11b/g), Network Mode

(infrastructure, Adhoc), operating channel, number of AP’s detected, battery strength,
Link/Act indicator)

• Immediately indicates whether the environment has available wireless networks or

equipment.

• Portable and mini-size design.

• Rechargeable Li-Polymer battery.

1.2 Specifications

• Standard: IEEE 802.11g/b

• LCM Size: 96x32 with EL backlight

• Battery: 4.2V Rechargeable Li-Polymer Battery

• USB Port: USB 2.0 Type A

• Frequency Band: 2.4000~2.4835GHz (Industrial Scientific Medical Band)

• Modulation: OFDM with BPSK, QPSK, 16QAM, 64QAM (11g)

BPSK, QPSK, CCK (11b)

• Antenna: Internal Antenna

• Dimension: 14(H) x 28.5(W) x 91(D)

• Temperature: 32~131°F (0 ~55°C)

• Humidity: 0-85% (NonCondensing)

• Certification: FCC, CE

1.3 Package Contents

Before you begin the installation, please check the items of your package. The package
should include the following items:

• One Wi-Fi Detector

• One User Manual

If any of the above items is missing, contact your supplier as soo n as possible.

2

2 The Outward Appearance of the Wi-Fi Detector

3

3 How to charge the Wi-Fi Detector

1. Remove the cap from the Wi-Fi Detector and carefully insert the USB connector into any

available USB port on your computer. You will see the recharging screen.

The battery strength indicator will be animated while the Wi-Fi detector is being rech arged.

2. When the Wi-Fi detector is finished recharging it will automatically stop charging the

battery. When it is finished recharging the battery you will see “charge complete”
displayed on the LCM and the battery strength indicator will stop blinkin g.

4

4 How to use the Wi-Fi Detector

1. Slide the power switch to the “ON” position, and a welcome screen will gr eet the user.

2. After the welcome screen is displayed the Wi-Fi detector will automatically enter

scanning mode to detect Wi-Fi signals.

In scanning mode the display will display the total number of bo th non-encrypted and
encrypted Wi-Fi signals detected.

3. Once scanning mode is complete, the detector will enter its standard display mode.

The detector automatically sorts the signals by the following criteria:
Non-encrypted AP’s according to signal strength followed by encrypted AP’s according
to signal strength.

1

2 3

4

5

6

8

7

5

The Icons on the LCM display are displayed as follows:

1. INFRA indicates the signal is an infrastructure mode signal, ADHOC indicates the
signal is an Adhoc mode signal.

2. “g” indicates the signal is a 802.11g wireless signal. “b” indicates the signal is a

802.11b wireless signal.

3. Signal strength indicator with 5 bars indicating the signal strength.

4. Encryption indicator: “WEP” for WEP encryption, “WPA” for WPA encryption, and
“WPA2” for WPA2 encryption, and “OPEN” indicates it is a non-encrypted signal.

5. Battery indicator with 3 bars indicating battery power. When the indicator is
empty, please recharge the detector by inserting it into a USB port.

6. Operating Channel: Indicates the current operating channel of the detected Wi-Fi
signal.

7. SSID Indicator: Displays the SSID of the detected Wi-Fi signal, if the SSID is too
long the SSID indicator will scroll to display the complete SSID.

8. Number of AP’s Detected: the left digit indicates which detected Wi-Fi signal is
currently displayed and the right digit indicates the total amount of Wi-Fi signals
detected.

4. If the user wishes to determine where any detected signal strength is the strongest, the
user simply has to hold down the “scan” button for 3 seconds to enter “lock mode”.
When the detector is in “lock mode” an icon with a capitalized “L” appears in the upper
left corner of the display.

In “lock mode” the detector constantly refreshes the signal strength so the user can
move around to find where the detected signal strength is the strongest.

Just hold down the “scan” button for 3 seconds again to unlock the “lock mode”.

6

5 Appendix

This chapter provides some information about IEEE 802.11b/g standards.

1. What is the IEEE 802.11g standard?

802.11g is the new IEEE standard for high-speed wireless LAN communications that
provides for up to 54 Mbps data rate in the 2.4 GHz band. 802.11g is quickly becoming
the next mainstream wireless LAN technology for the home, office and public ne tworks.

802.11g defines the use of the same OFDM modulation technique specified in IEEE

802.11a for the 5 GHz frequency band and applies it in the same 2.4 GH z frequency
band as IEEE 802.11b. The 802.11g standard requires backward compatibility with

802.11b.

The standard specifically calls for:

A. A new physical la yer for the 802.11 Medium Access Control (MAC) in the 2.4 GHz

frequency band, known as the extended rate PHY (ERP). The ERP adds OFDM as
a mandatory new coding scheme for 6, 12 and 24 Mbps (mandatory speeds), and
18, 36, 48 and 54 Mbps (optional speeds). The ERP includes the modulation
schemes found in 802.11b including CCK for 11 and 5.5 Mbps and Barker code
modulation for 2 and 1 Mbps.

B. A protection mechanism called RTS/CTS that governs how 802.11g devices and

802.11b devices interoperate.

2. What is the IEEE 802.11b standard？

The IEEE 802.11b Wireless LAN standard subcommittee, which formulates the
standard for the industry. The objective is to enable wireless LAN hardware from
different manufactures to communicate.

3. What does IEEE 802.11 feature support？

The product supports the following IEEE 802.11 functions:

 CSMA/CA plus Acknowledge Protocol
 Multi-Channel Roaming
 Automatic Rate Selection
 RTS/CTS Feature
 Fragmentation
 Power Management

4. What is Ad-hoc？

An Ad-hoc integrated wireless LAN is a group of computers, each has a Wireless LAN
adapter, Connected as an independent wireless LAN. Ad hoc wireless LAN is
applicable at a departmental scale for a branch or SOHO operation.

7

5. What is Infrastructure？

An integrated wireless and wireless and wired LAN is called an Infrastructure
configuration. Infrastructure is applicable to enterprise scale for wireless access to
central database, or wireless application for mobile workers.

6. What is BSS ID？

A specific Ad hoc LAN is called a Basic Service Set (BSS). Computers in a BSS must
be configured with the same BSS ID.

7. What is WEP？

WEP is Wired Equivalent Privacy, a data privacy mechanism based on a 40 bit shared
key algorithm, as described in the IEEE 802 .11 standard.

8. What is TKIP?

TKIP is a quick-fix method to quickly overcome the inherent weaknesses in WEP
security, especially the reuse of encryption keys. TKIP is involved in the IEEE 802.11i
WLAN security standard, and the specification might be officially released by early

2003.

9. What is AES?

AES (Advanced Encryption Standard), a chip-based security, has been developed to
ensure the highest degree of security and authenticity for digital information, wherever
and however communicated or stored, while making more efficient use of hardware
and/or software than previous encryption standards. It is also included in IEEE 802.11i
standard. Compare with AES, TKIP is a temporary protocol for replacing WEP security
until manufacturers implement AES at the hardware level.

10. Can Wireless products support printer sharing？

Wireless products perform the same function as LAN products. Therefore, Wireless
products can work with Netware, Windows 2000, or other LAN operating systems to
support printer or file sharing.

11. Would the information be intercepted while transmitting on air？

WLAN features two-fold protection in security. On the hardware side, as with Direct
Sequence Spread Spectrum technology, it has the inherent security feature of
scrambling. On the software side, WLAN series offer the encryption function (WEP) to
enhance security and Access Control. Users can set it up depending upon their needs.

8

12. What is DSSS？What is FHSS？And w hat are their differences？

Frequency-hopping spread-spectrum (FHSS) uses a narrowband carrier that changes
frequency in a pattern that is known to both transmitter and receiver. Properly
synchronized, the net effect is to maintain a single logical ch annel. To an unintended
receiver, FHSS appears to be short-duration impulse noise. Direct-sequence spread­spectrum (DSSS) generates a redundant bit pattern for eac h bit to be transmitted. This
bit pattern is called a chip (or chipping code). The longer the chip is, the greater the
probability that the original data can be recovered. Even if one or more bi ts in the chip
are damaged during transmission, statistical techniques embedded in the radio can
recover the original data without-the need for retransmission. To an unin tended
receiver, DSSS appears as low power wideband noise and is rejected (ignored) by
most narrowband receivers.

13. What is Spread Spectrum？

Spread Spectrum technology is a wideband radio frequency technique developed by
the military for use in reliable, secure, mission-critical communication systems. It is
designed to trade off bandwidth efficiency for reliability, integrity, and security. In other
words, more bandwidth is consumed than in the case of narrowband transmission, but
the trade off produces a signal that is, in effect, louder and thus easier to detect,
provided that the receiver knows the parameters of the spread-spectrum signal being
broadcast. If a receiver is not tuned to the right frequency, a spread –spectrum signal
looks like background noise. There are two main alternatives, Direct Sequence Spread
Spectrum (DSSS) and Frequency Hopping Spread Spectrum (FHSS).