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Site Survey Tool - TamoGraph

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Introduction
Overview
System Requirements
Driver Installation
Licensing and Trial Version Limitations
Interface Overview
Access Point List
Floor Plan / Site Map
Plans and Surveys, Properties, and Options Panel
Main Menu
Performing a Site Survey
New Project Wizard
Calibration
Configuration
Data Collection
Understanding Survey Types: Passive, Active, and Predictive
Active Survey Configuration
Best Practices, Tips, and Tricks
Survey Job Splitting
Predictive Surveys
Drawing Walls and Other Obstructions
Drawing Attenuation Zones
Placing and Configuring Virtual APs
Working with Presets
Applying Visualizations
Working with Multi-floor Sites
Mixing Real and Virtual Data
Best Practices, Tips, and Tricks
Analyzing Data – Passive and Predictive Surveys
Selecting Data for Analysis
Adjusting AP Locations After Passive Surveys
Splitting an AP into Multiple Unique APs
Working with Multi-SSID APs
Visualization Types
Signal Level
Signal-to-Noise Ratio
Signal-to-Interference Ratio
AP Coverage Areas
Number of APs
Expected PHY Rate
Frame Format
Channel Bandwidth
Channel Map
Requirements
Analyzing Data – Active Surveys
Selecting Data for Analysis
Visualization Types
Actual PHY Rate
TCP Upstream and Downstream Rate
UDP Upstream and Downstream Rate
UDP Upstream and Downstream Loss
Round-trip Time
Associated AP
Requirements
Spectrum Analysis
Hardware Requirements
Spectrum Data Graphs
Performing Spectrum Analysis Surveys
Viewing Collected Spectrum Data
Exporting Spectrum Data
Reporting and Printing
Customizing Reports
Google Earth Integration
Configuring TamoGraph
Plans and Surveys
Properties
Plan / Map
Environment
Client Capabilities
Requirements
Scanner
Options
Colors and Value Ranges
AP Detection and Placement
Visualization Settings
Miscellaneous
Configuring GPS Receiver
Using GPS Configuration Dialog
Finding the GPS Receiver Port Number
Taking Photographs
Voice Control
Using TamoGraph in a Virtual Machine
Frequently Asked Questions
Sales and Support

Selecting Data for Analysis

Three key interface elements affect what data will be analyzed and how. These elements are overviewed below.

The Plans and Surveys tab on the right panel defines what data the application will visualize. This tab is organized as a hierarchical tree, where for each floor or site plan, you will see one or more site surveys you have conducted.  You need to select the floor plan to be analyzed and mark one or more survey paths to be included using the corresponding checkboxes (unless you are working on a predictive survey, where no actual on-site measurements are conducted.) Depending on where and when the surveys were conducted, you may want to check all or only some of the survey checkboxes. For example, if you have a large site and you made one break while conducting the site survey, your walkabout path will consist of two parts, both of which should be included in the analysis. In a different scenario (e.g., if you surveyed the entire site prior to installing additional wireless hardware and then surveyed it again after the installation), you will probably want to include only one of the surveys and then compare it with the other by changing the checkbox selection. The Type column indicates the survey type: Active, Passive, or Active+Passive. We are reviewing passive surveys in this chapter, so you should select the surveys that are marked as Passive or Active+Passive in this column. You can use the Comments column to add or modify comments for surveys or modify the survey names for clarity at any time.

The Visualization drop-down box on the tool bar defines what type of analytical tool will be applied to the selected site plan. A visualization is a graphical representation of WLAN characteristics displayed as an overlay on top of the floor plan. The available visualization types will be described below. To select a visualization, simply select the corresponding item from the drop-down list, under the Passive section. . To clear all visualizations, select None. When no visualization is selected, the floor plan is overlaid with the walkabout paths and guess range areas (the zones within which TamoGraph can make a good assessment of the WLAN parameters).

The Selected APs / All APs buttons on the tool bar, along with the AP list, control which subset of observed APs is used for visualizations. Typically, you should select the All APs mode only if all of the listed APs belong to your WLAN, as there is no point in visualizing, for example, the wireless coverage areas for the AP to which your wireless clients cannot connect. The default mode is Selected APs, in which TamoGraph will analyze only the signals originating from the APs you selected in the AP list on the left panel. In most corporate WLANs, all APs share the same SSID, so the easiest way to select only your APs is using the Group by => SSID command button located above the AP list and checking the box next to your SSID.

Note: It is extremely important that the correct subset of APs be selected for analysis. Selecting APs that do not belong to your WLAN will result in incorrect coverage maps and prevent TamoGraph from identifying network issues. It will also slow down the analysis process.

Data visualizations, such as signal level or signal-to-noise ratio, may or may not cover the entire area of the floor plan. This depends on the Extrapolate data beyond the guess range option, which can be configured in the new project wizard or at a later time on the Properties tab of the right-side panel. If this option is enabled, TamoGraph will calculate WLAN characteristics beyond the areas covered by your walkabout path. While this is convenient, as the time needed to collect data for the entire area is reduced, data extrapolation cannot produce reliable results. Your walkabout path should normally cover all the areas for which accurate data is important.