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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

Understanding Survey Types: Passive, Active, and Predictive

There are two types of surveys that you can conduct in TamoGraph: passive and active. During a passive survey, the application collects the most comprehensive data on the RF environment:  information on access points and their characteristics, signal strength, noise level, interference, etc. This is the default and most important survey type that we recommend to conduct for every project. If you need more insight into the real-world performance of your WLAN, TamoGraph can also perform an active survey. During active surveys your Wi-Fi adapter connects to the wireless network(s) of your choice and the application generates network traffic to measure actual throughput rates and a few other metrics.In addition to the surveys based on actual on-site measurements, TamoGraph can be used for planning WLANs that have not been deployed yet. This type of survey is called predictive, because Wi-Fi characteristics are predicted for the virtual environment model created by the user. The virtual model includes walls and other obstructions, as well as virtual APs placed by the user. In other words, it is a computer simulation. No on-site measurements are conducted.

The table below summarizes the distinctions between the two survey types. Please read this information carefully to make sure you fully understand which survey type you need.

 

Passive Surveys

Active Surveys

Predictive Surveys

When to conduct

Highly recommended at all times. The most comprehensive survey type that covers the most important WLAN characteristics and metrics.

Optional. Conduct when measurement of real-world performance characteristics of your WLAN is required.

Optional. Conduct before deployment to plan your WLAN and simulate its characteristics.

Hardware requirements

A compatible wireless adapter is required. For the up-to-date list of compatible adapters, please visit our Web site.

Virtually any modern wireless adapter with the latest drivers supplied by the adapter vendor will work.

A fast multi-core CPU. Intel i7 is highly recommended. No wireless adapter is required.

Additional software configuration requirements

None

You must create a Windows profile for the WLAN you plan to test. If you plan to measure TCP and/or UDP throughput, you must also run the throughput server utility on the wired side of your WLAN.

None

How data is collected

The application passively listens for packets and does not attempt to connect to WLANs.

The application connects your Wi-Fi adapter to the wireless network(s) of your choice to measure actual throughput rates and a few other metrics.

No on-site data collection is performed. Data is simulated based on the virtual environment that you created.

Available visualizations

Signal Level

Signal-to-Noise Ratio

Signal-to-Interference Ratio

AP Coverage Areas

Number of APs

Expected PHY Rate

Frame Format

Channel Bandwidth

Requirements

Actual PHY Rate

TCP Upstream Rate *

TCP Downstream Rate *

UDP Upstream Rate *

UDP Downstream Rate *

UDP Upstream Loss *

UDP Downstream Loss *

Round-trip Time

Associated AP

Requirements

Same as for passive surveys

List of APs and their characteristics is available

Yes

No

Yes

Surveys can be conducted simultaneously

Yes. You can conduct a simultaneous Active + Passive survey if your computer is equipped with two different Wi-Fi adapters. One of them must be compatible with passive surveys; for the up-to-date list of compatible adapters, please visit our Web site.

Not applicable

* When using advanced mode with a throughput server utility connection. See Survey Type Selection for more info.

As mentioned above, some additional software configuration is required when performing an active survey. The next chapter provides detailed information on how to configure TamoGraph for an active survey.