Berkeley Varitronics Systems Wi-Fi Power Analyzer Manuale utente

manual version 2.2

Wi-Fi Power Analyzer

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Contents

Wi-Fi Power Analyzer HARDWARE OPERATION.................................................................... 2

GETTING STARTED...................................................................................................... 2

LED STATUS INDICATORS............................................................................................. 3

CONNECTION AND USE................................................................................................ 3

BATTERY REPLACEMENT............................................................................................... 3

STARTUP SCREEN/UNIT DATA........................................................................................ 4

MAIN MENU SCREEN................................................................................................... 4

802.11b/802.11a SUB-MENUS........................................................................................ 4

SCAN BOTH BANDS..................................................................................................... 5

SCAN BAND.............................................................................................................. 5

CHANNEL POWER....................................................................................................... 6

POWER PROFILE........................................................................................................ 6

SELECT CHANNEL....................................................................................................... 7

ADJUST CONTRAST..................................................................................................... 7

CABLE LOSS............................................................................................................. 7

Wi-Fi Power Analyzer OPTIONAL SOFTWARE OPERATION....................................................... 8

PC SOFTWARE INSTALLATION

SCREEN COMPONENTS

PLAY, RECORD and MISCELLANEOUS CONTROLS

RECORDING Wi-Fi Power Analyzer MEASUREMENT DATA

PLAYBACK OF RECORDED Wi-Fi Power Analyzer DATA DISK FILES

SPECIAL REPLAY SWITCHES

TROUBLE SHOOTING

BATTERY TIPS........................................................................................................... 27

NETWORKING BASICS.................................................................................................. 28

GLOSSARY OF ACRONYMS............................................................................................ 30

GENERAL SAFETY....................................................................................................... 31

ACCCESS POINT CONNECTOR GUIDE................................................................................ 33

Wi-Fi Power Analyzer DATA SHEET

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Wi-Fi Power Analyzer™ is an instrument used to iden-

tify the frequency of an 802.11a,b or g Access Point

(AP) or Network Interface Card (NIC). In addition,

measurements can be used to verify the power output

and the frequency vs. power spectrum of the AP or NIC

under test.

Wi-Fi Power Analyzer is powered by 4 AA Ni-MH

batteries for portability or via an external AC power

supply. Data is displayed on a built in back-lit LCD

display. The unit is controlled via a simple 4 button

keypad that is used to navigate through the simple

menus and to select measurements. The Wi-Fi Power

Analyzer is connected directly to the AP or NIC under

test using the supplied antenna connection kit.

Measurements can be displayed either as a graph or in

large, easy to read text.

GETTING STARTED

Wi-Fi Power Analyzer is powered by 4 rechargeable

Ni-MH cells and comes with 4 extra cells and a Ni-MH

charger. Replacement AA cells must have at least 1500

mAh per cell. Ni-MH cells are recommended for best

performance from your Wi-Fi Power Analyzer. See the

charger’s instructions and battery tips in this manual

for more information. Wi-Fi Power Analyzer may also

be powered with it’s supplied DC transformer for loca-

tions near an AC power outlet.

Wi-Fi Power Analyzer’s display is a 128 x 64 blue,

backlit LCD capable of adjustable contrast.

Wi-Fi Power Analyzer connects to access points through

it’s SMA male connector. An adapter kit is included to

ensure compatibility with many access points.

Wi-Fi Power Analyzer is powered on and off through its

green rocker switch.

Wi-Fi Power Analyzer operation is all done through

the 4-button keypad. The top and bottom buttons scroll

through menu options and set threshold levels. The left

button selects the highlighted menu option. The right

button returns to the previous screen.

At the top of the Wi-Fi Power Analyzer rest the power

switch and antenna connector. The power switch is a

simple two way toggle switch. The antenna connec-

tor (middle) is an SMA Female 50 ohm. The provided

antenna easily screws and unscrews from this connec-

tor. Be sure to unscrew antenna when transporting the

Wi-Fi Power Analyzer.

LED STATUS INDICATORS

Power LED indicates when the unit is ON.

Measurement LED indicates when measuring (Bar or

Line graph screen). LED is OFF when in Select Screen

Low Battery indicates when the batteries need a charge

or replacement.

CONNECTION AND USE

Connect the AP to be tested using the supplied SMA

connection kit to the Wi-Fi Power Analyzer RF input

connector, the SMA connector on the top of the Wi-Fi

Power Analyzer. Make sure both the AP and the Wi-Fi

Power Analyzer are on If not already displayed, select

either the bar or line graph measurement. If the current

RF power indicated by the text display in the lower left

of the display is –40 dbm and never changes, check the

connection between the AP and Wi-Fi Power Analyzer.

If RF power is indicated by this portion of the display,

but no bar or line is displayed, reduce the threshold

using the Down key until the display becomes active.

BATTERY REPLACEMENT

When the battery low indicator comes on, the batteries

must be replaced or recharged. To remove the batter-

ies, disconnect the Wi-Fi Power Analyzer RF input and

turn the power switch to the off position. Hold the Wi-Fi

Power Analyzer with the bottom facing you, the SMA

RF input facing upward. Locate the tab on the battery

cover and using your finger, gently pull the tab toward

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Page 4

the bottom of the unit until the cover comes away from

the unit. Remove the batteries and replace, observing

the battery polarities marked on the plastic of the bat-

tery compartment. Replace the battery cover by posi-

tioning the tab on the bottom of the cover into the slot

in the bottom of the battery compartment. Push on the

cover until the tab on the top clicks back into position.

The unit is now ready to resume use.

STARTUP SCREEN / UNIT DATA

When the user powers up the Wi-Fi Power Analyzer,

this screen will appear briey. The STARTUP SCREEN

is followed by the MAIN MENU. This screen can be

accessed anytime through the UNIT DATA screen.

MAIN MENU

Use this screen to navigate through all of the options.

Use the UP/DOWN ARROWs to scroll through the menu

options. Select the desired option by pressing the

LEFT ARROW button. Press the RIGHT ARROW button

anytime to go back to the previous screen and return to

the MAIN MENU.

802.11b/802.11a SUB-MENUS

Select 802.11b or 802.11a in the MAIN MENU to enter

this screen. Use the UP/DOWN ARROWs to scroll

through the menu options. Select the desired option

by pressing the LEFT ARROW button. Press the RIGHT

ARROW button anytime to go back to the previous

screen and return to the MAIN MENU.

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SCAN BOTH BANDS (802.11b and 802.11a)

Selected from the main menu, this measurement scans

through all 802.11b and 802.11a channels and displays

the resulting dBm vs. channel on an easy to read graph

or in large text characters.

Access the text measurement display option anytime

by pressing the LEFT ARROW button. Press the same

button again to return to the graphical measurement

display.

If the type of AP or NIC is unknown, this measurement

can be used to identify the RF band. Once the band is

identied, the frequency can be found using the Scan

Band measurement.

SCAN BAND (802.11b/802.11b)

Use this measurement to identify the frequency of the

AP or NIC under test. The result of this measurement

is displayed on an easy to read graph. The frequency

identied is marked by an arrow and the channel

number associated with the frequency is displayed in

the upper left of the graph display.

The SCAN BAND measurement for the 2.4 GHz band

is selected via the 802.11b menu. SCAN BAND for the

802.11a band is selected using the 802.11a menu.

The channel found by the SCAN BAND measurement

is used by the CHANNEL POWER and POWER PROFILE

measurements.

Access the text measurement display option anytime

by pressing the LEFT ARROW button. Press the same

button again to return to the graphical measurement

display.

Page 6

CHANNEL POWER

The channel power measurement displays the power of

the channel found by SCAN BAND or a channel selected

by the operator. Use this measurement to identify an

AP or NIC that is not transmitting at the correct power

level.

If you know exactly which channel you want, choose

SELECT CHANNEL in the sub-menu.

Access the text measurement display option anytime

by pressing the LEFT ARROW button. Press the same

button again to return to the graphical measurement

display.

POWER PROFILE

Use the POWER PROFILE measurement to view the

shape of the frequency vs. power characteristic of the

AP or NIC under test.

As with the CHANNEL POWER measurement, this

measurement analyzes the channel found by BAND

SCAN or a channel selected by the operator. This

measurement is used to identify an AP or NIC with a

frequency response (lter) problem.

Access the text measurement display option anytime

by pressing the LEFT ARROW button. Press the same

button again to return to the graphical measurement

display.

Page 7

This Power Prole is an example of a poor or “wireless” connection

to the measured access point. Basic AP verication can be made

by placing the Wi-Fi Power Analyzer closely to the AP’s antenna tip

but for the most accurate measurements, ALWAYS connect directly

to the access point using the supplied SMA connector kit. Be sure

all SMA connectors/adapters are tightened completely.

SELECT CHANNEL

Select this menu screen to directly access the 802.11b

or 802.11a channel to be measured. Use the UP/DOWN

ARROW keys to scroll to the desired channel.

ADJUST CONTRAST

Select this screen to change the contrast adjustment.

Use the UP/DOWN ARROWS to change the contrast and

the LEFT/RIGHT ARROW buttons to return to the MAIN

MENU.

CABLE LOSS

The CABLE LOSS selection can be used to compensate

for a known cable loss between 0 and –6 dB. Use the

UP and DOWN buttons to select the required cable loss

compensation and press the Enter key to use. Entering

a value of 0 dB for Cable Loss has no effect on the Wi-

Fi Power Analyzer display. This is the shipped factory

default value.

Wi-Fi Power Analyzer Manual For v1.20 PC Software (optional)

Software Installation

USB Driver

BEFORE installing the PC software, the USB driver for the Wi-Fi Power Analyzer must be installed.

To install the USB driver:

1) Turn OFF the target PC.

2) Connect the supplied USB cable to the Wi-Fi Power Analyzer and turn on the Wi-Fi

Power Analyzer. Select and run the “Scan 802.11b Band” measurement. Make sure the free end of

the USB cable is NOT plugged into the target PC.

3) Turn on the target PC. When Windows 2000 or Windows XP is done starting up, place

the supplied CD into the PC CD drive.

4) Now plug the free end of the USB cable into a USB socket on the target PC.

Windows

will display the wizard in Figure 1.

Figure 1

5) Click the “No, not this time” radio button.

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Figure 2

6) Click the “Next>” button on the wizard in figure 2 (make sure the first radio button is

on, Recommended).

Figure 3

7) Click the “Continue Anyway” button when the wizard in figure 3 is displayed.

Page 9

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