Wireless & Spy 4 Channel Guide de l'utilisateur Page 1

Welcome to the World of Wi-Spy.This hands-on exercise reviews the fundamentals of spectrum analysis using MetaGeek's Wi-Spy DBx and Chanalyzer Pr

Use a Two Minute Time SegmentFor this exercise we will be using a Timespan of two minutes. Adjust the Timespan in the Navigation pane by clicking the

Press the pause button in the Chanalyzer Timespan controls when the microwave oven is about to stop. Since the Timespan is set to two minutes, and we

Add a Density View Block to the ReportAt the top of the Report Builder interface, select add graph (the first button) and choose Density. Each of thes

Edit the report block details to change the title. Give the block a title to relate it to the microwave oven like “Microwave Oven Interference.” The C

Add another Density View block and Channels TableBy adding blocks from two different spans of time, Chanalyzer Pro can help users explain to customers

another .wsxr file. To do so, click “Append.” You might add a pre-built, vendor-specific block set discussing the latest features available and how th

802.11g ERP-OFDM Identify 802.11g ERP-OFDM by looking for a flat top. The flat top of OFDM signatures are under 20 MHz wide.This is the same signature

Non-Wi-Fi PatternsMicrowave OvensMicrowave Ovens operate in the 2.4 GHz range. Use the Density View of Chanalyzer to identify microwave oven leakage.

Motion SensorsMotion sensors tend to transmit in very narrow frequency ranges. Sometimes a building will have motion sensors in each room. If this is

BluetoothBluetooth hops across the 2.4 GHz 1,600 times a second, which is a form of frequency-hopping spread spectrum (FHSS) modulation. Due to the na

Run ChanalyzerClick on the start menu to access the “MetaGeek” directory. Select Chanalyzer Pro to launch software. Chanalyzer ProMetaGeek developed t

Press PauseThe Utilization graph shows a wide curved shape due to a lower Utilization threshold of -90dBm.Build a SignatureUsers can create Custom Cla

Use Playback Controls for Better Signature Results.Press Pause when the shape appears to match the Density View modulation pattern. You may also want

If a signature pops up for a few seconds then disappears and never comes on again, it is quite likely that this was a false positive. Tracking Down Tr

Adjust the Timespan to select the range of time in which the amplitude was the highest (most red). Since the software continuously logs data from the

When performing site surveys, directional antennas minimize the guessing associated with determining where interferers are transmitting from. Instead

Navigation PaneThe Navigation pane provides controls for browsing Wi-Spy / Wi-Fi capture sessions or recordings. The following table describes each co

Waterfall NavigationWaterfall Navigation displays all data in the current Wi-Spy session with visual indicators to show the section of time detailed i

Color by DensityThe more often a signal is detected at a specific amplitude and frequency, the brighter the point on the graph becomes. Low density si

Users can choose which tabs to display and which to hide by selecting "Tabs" from Chanalyzer's top menu. NewsThe News tab keeps users u

Networks GraphClick the Networks Graph to show signal strength over time. This data comes from the wireless network card. It draws the rows selected

Channels TableThe Channels Table “grades” each Wi-Fi channel, based on RF activity within the given frequency range during a selected timespan in the

First Spectrum Analysis ExperimentNow that you're familiar with the Chanalyzer Pro interface, let's go through a step-by-step example. To fo