Site Survey Tool - TamoGraph

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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
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
Virtual APs Placement Methods
Manual Placing and Configuring Virtual APs
Automatic Placing and Configuring Virtual APs
Reconfiguring 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
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
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
Plan / Map
Client Capabilities
Colors and Value Ranges
AP Detection and Placement
Visualization Settings
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

Reconfiguring Virtual APs

In addition to automatic AP placement for new deployments where no virtual APs have been placed (discussed in the previous chapter), TamoGraph allows you to reconfigure an existing predictive model. The purpose of such reconfiguration is to optimize the channel allocation of the existing virtual APs and/or to adjust their output power levels to make sure that your existing virtual APs meet the new requirements. Unlike automatic AP placement discussed above, reconfiguring virtual APs does not change the APs’ positions on the floor plan.

To run the wizard, click on the Reconfigure APs button on the RF Planner toolbar. You will be prompted to select one of the following reconfiguration modes:

· Coverage requirements – reconfigures an existing predictive model to match new requirements for signal levels and the number of APs to cover the WLAN.
· Channel plan – reconfigures an existing predictive model to optimize channel assignment.
· Both – combines the two modes listed above.

The reconfiguration can be applied to all existing APs or to only a subset: use the Bands and AP Selection frame to select the Bands to reconfigure as well as to indicate whether you want to work with All APs or only Selected APs.

After clicking Next, you will be prompted to select Coverage requirements (if you have chosen that reconfiguration mode). The Minimum number of APs that must provide coverage in each point value is used to determine the number of APs uses for redundancy and seamless roaming. The With the signal level of at least field is used to determine the minimum signal level in dBm provided by the APs in each point of the coverage area. To reduce co-channel interference, the algorithm may adjust the output power of the APs to be placed. Use the Minimum AP power and Maximum AP power drop-down lists to set the constraints of such adjustments. If the Minimum AP power is set to Power off, the algorithm may turn off the corresponding radio completely. If you prefer to not have the power level adjusted, set Minimum AP power and Maximum AP power to the same value equal to the AP’s default output power. If you prefer to avoid any intermediate power level and would rather have the radio either fully turned off or work at the default power level, check the Don’t allow intermediate power levels box. It is important to note that the requirements may or may not be the same for the 2.4 and 5 GHz bands. For example, you may want to require -67 dBm in the 5 GHz band for your modern VoIP-enabled smartphones and tablets, but only -75 dBm for legacy 2.4 GHz devices. If you want to have the same requirements for both bands, use the chain-link button to make the requirements interlocked.

On the next page, you will be prompted to select a Channel plan (if you have chosen that reconfiguration mode). For 2.4 GHz, we recommend channels 1-6-11 in the regulatory domains where 11 channels are allowed, or 1-7-13 in the regulatory domains where 13 channels are allowed. As a backup option, you may want to use 1-4-7-11 and 1-5-9-13, respectively. However, these setups are by no means recommended, because if you use four 20 MHz channels, a channel overlap is inevitable. For 5 GHz, your choice of channels is dictated by two key factors: the regulatory domain and the set of channels supported by your APs and clients. Before you select channels, first verify which of them are allowed in your regulatory domain. Second, if you want to use DFS channels, verify that hardware supports them; in some APs and clients, DFS channels are disabled.

Click Done to begin the AP reconfiguration process. If you do not like the result, press Ctrl + Z to revert to the previous state.