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Transmit Power and Antenna Configuration

Overview

The transmit power of an AP affects the wireless coverage area and the maximum achievable signal-to-noise ratio. Proper configuration of transmit power is important for ensuring a wireless network is operating at its highest capacity. There are two methods to configure the transmit power of Meraki access points: Auto Power (Recommended) and Manual Power

NOTE: All configuration for transmit power will be done from the Wireless > Configure > Radio Settings page.

Auto Power

Auto transmit power leverages RF data gathered by an AP to decide which radio transmit power levels would be best for client roaming and performance. More information on the Auto Power algorithm can be found in our Auto TX article. By default, all AP radios are configured to use Auto Power

Manual Power

Each AP may alternatively be configured with a static power setting on a per-radio basis. This instructs the AP to use the manually defined power setting instead of the Auto Power algorithm. The list of power settings available is determined per-band, per-regulatory domain.

NOTE: There are cases where high transmit powers are available as options but mechanisms in the AP may prevent it from broadcasting at the configured power. See the Max Power Limitations article for more details.

Configuring Manual Transmit Power

  • From the Wireless > Configure > Radio Settings page, select either 2.4 or 5 from the Band dropdown menu to modify the correct radio.
  • Select the number/link in the Target power (dBm) column of a specific AP.

Screen Shot 2019-12-10 at 10.33.48 AM.png

 

  • Select Manual and choose the desired transmit power for the specified radio.
  • Then select Save.

Disabling 2.4Ghz

Administrators can set the 2.4Ghz radio to be turned off. This disables all client serving functions of the 2.4Ghz radio but does not prevent the 2.4Ghz radio from being used for Rogue SSID and CMX detection.

  • Instead of selecting Auto or Manual when the 2.4Ghz radio is being modified, select Off instead to disable client serving functions on the 2.4Ghz band.

Screen Shot 2019-12-10 at 10.36.48 AM.png

Dashboard Power and Antenna Gain 

The power levels listed in dashboard are the base power levels of the AP, they do not include antenna gain.

Antenna Configuration

When using external antenna options, the Dashboard needs to have the appropriate antenna option configured in order to enforce regulatory restrictions like EIRP. External antennas can be configured on the Wireless > Monitor > Access Points > Access Point Details page for a selected AP, at the bottom left of the page under the Config and Power sections. Select the pencil icon to edit the antenna type. Ensure the selected antenna model matches the antenna type physically installed on the AP.  

WARNING: Failure to configure the correct antenna may place the AP outside of regulatory limits. The administrator is responsible for ensuring this configuration is correct. 

 Screen Shot 2019-12-10 at 10.39.32 AM.png

NOTE: Dashboard populates a list of certified antennas by AP model. Refer to the MR datasheets for details on which Meraki Antennas are supported by each MR.

NOTE: As referenced in the hardware install guides, two identical antennas are necessary if using a 2-port antenna on the MR84. Other AP models may allow for different antennas per-band based on their antenna port configuration.

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