ePMP: Configuring the AP Radio Power Control

Products ePMP
1

AP Radio Page_PowerControl.png
AP Radio Page_PowerControl.png1281×939 90.8 KB

Power Control

Transmitter Output Power

This value represents the combined power of the AP’s two transmitters.  This value may be automatically adjusted based on the configuration of the parameter Country.

Nations and regions may regulate transmitter output power. For example

·       2.4 GHz and 5 GHz modules are available as connectorized radios, which require the operator to adjust power to ensure regulatory compliance.

The professional installer of the equipment has the responsibility to

  • maintain awareness of applicable regulations.
  • calculate the permissible transmitter output power for the module.
  • confirm that the initial power setting is compliant with national or regional regulations
  • confirm that the power setting is compliant following any reset of the module to factory defaults.

Antenna Gain

This value represents the amount of gain introduced by an external antenna (minus cable loss). This value is used in calculating the unit’s Equivalent Isotropic Radiated Power (EIRP) level. For certain Country Code configurations, the unit’s EIRP may be limited based on regional regulations.

Subscriber Module Target Receive Level

Each SM’s transmitter output power is automatically set by the AP. The AP monitors the received power from each SM and adjusts each SM’s transmitter output power so that the received power at the AP from the SM is not greater than what is configured in SM Target Received Power Level. These automatic power adjustments ensure that the SM is not transmitting excessive energy (raising system noise level) and that the SM is able to achieve an optimal modulation state (and maximum achievable throughput).
Nominally, target receive levels must be set lesser than -60 dBm in order to prevent interference from co-located co-channel sectors. 

Uplink Antenna Selection

Uplink Antenna Selection specifies the antenna to be used in the uplink.  This parameter is specific to ePMP 2000 APs with optional Smart Antenna.

Auto:  The AP decides which antenna to use (sector or Smart Antenna) for uplink communications based on internal quality metrics.

Forced Sector Antenna:  The AP uses the Sector Antenna for all SM uplink communications.

Forced Smart Antenna:  The AP uses the smart antenna for all SM uplink communications.

Note

If the AP is configured with Uplink Antenna Selection set to Auto and an SM is set to Forced Sector Antenna or Forced Smart Antenna, the SM setting will be enforced.

If the AP is configured with Uplink Antenna Selection set to Forced Sector Antenna or Forced Smart Antenna and a SM is set to a conflicting Forced setting, the AP’s setting will be enforced.
2 Likes