WiFi Pineapple Mark VII
  • WiFi Pineapple Mark VII
  • Setup
    • Connecting the WiFi Pineapple
    • Setting up your WiFi Pineapple
    • Connecting to the WiFi Pineapple on Linux
    • Connecting to the WiFi Pineapple on Windows
    • Setting up the WiFi Pineapple over WiFi
    • Setup by USB Disk
  • UI Overview
    • Introduction to the UI
    • Dashboard
    • Campaigns
    • PineAP
    • Recon
    • Handshakes
    • Modules
    • Settings
    • Cloud C²
  • Developer Documentation
    • Developer Resources
    • Contributing to the Module Repository
  • WiFi Basics
    • Introduction to WiFi
    • Radios and Chipsets
    • Stations and APs
    • Transmit Power
    • Antennas
    • Channels and Regions
    • Protocols
    • Modes of Operation
    • Logical Configurations
    • MAC Addresses
    • Broadcast and Multicast MAC Addresses
    • SSIDs
    • 802.11 Frame Types
    • 802.11 Frame Structure
    • Management Frames
    • Frame Injection
    • Association and State
  • FAQ / Troubleshooting
    • MacOS Support
    • Establishing an Internet Connection
      • Configuring a Client Mode Connection
      • ICS on Linux
      • Configuring ICS on Windows
      • Configuring a USB Ethernet Adapter
    • Password Reset
    • Factory Reset and Recovery
    • WiFi Pineapple Updates
    • WiFi Pineapple Beta Updates
    • Compatible 802.11ac Adapters
  • Extras
    • MK7 LED Mod Installation
    • MK7 Kismet Case Installation
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  1. WiFi Basics

Transmit Power

There are four aspects which influence the overall transmission power of a WiFi radio. The first in the chain is what’s being transmitted from the chipset or SoC natively. This is typically around 20 dBm or 100 mW and is often expressed in the operating system as txpower.

Next is any given amplifier which will boost the source signal before it reaches the antenna. This additional element to the chain is not necessarily integrated with the SoC, and thus may not reflect the actual txpower determined by the operating system.

The final part of the chain is the antenna, which offer the gain as rated in dBi. Additionally, higher gain antennas may be equipped, with 9 dBi being a common size for a standard omnidirectional antenna.

The total output power of this chain is expressed as EIRP, or equivalent isotropically radiated power. The EIRP is calculated by adding the output power of the radio (plus any amplification) in dBm with the gain of the antenna in dBi. For example a 24 dBm (250 mW) radio with a 5 dBi antenna will have a total output power of 29 dBm (800 mW).

Local regulations will determine the maximum transmission power of any WiFi equipment. For example in the United States the FCC states that a 2.4 GHz point-to-multipoint system may have a maximum of 36 dBm EIRP (4 watts) while point-to-point systems may achieve much higher EIRP.

Last updated 3 years ago

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