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Configuring External Antenna

If the Instant AP has external antenna connectors, you need to configure the transmit power of the system. The configuration must ensure that the system’s EIRPEffective Isotropic Radiated Power or Equivalent Isotropic Radiated Power. EIRP refers to the output power generated when a signal is concentrated into a smaller area by the Antenna. is in compliance with the limit specified by the regulatory authority of the country in which the Instant AP is deployed. You can also measure or calculate additional attenuation between the device and antenna before configuring the antenna gain. To know, if the Instant AP device supports external antenna connectors, see the Installation Guide that is shipped along with the Instant AP device.

EIRP and Antenna Gain

The following formula can be used to calculate the EIRP limit related RFRadio Frequency. RF refers to the electromagnetic wave frequencies within a range of 3 kHz to 300 GHz, including the frequencies used for communications or Radar signals. power based on selected antennas (Antenna Gain) and feeder (Coaxial Cable Loss):

EIRP = Tx RF Power (dBm)+GA (dB) - FL (dB)

The following table describes this formula:

Table 1: Formula Variable Definitions

Formula Element

Description

EIRP

Limit specific for each country of deployment.

Tx RF Power

RF power measured at RF connector of the unit.

GA

Antenna gain

FL

Feeder loss

Configuring Antenna Gain

To configure antenna gain for Instant APs with external connectors, complete the following steps:

1. In the Network Operations app, select one of the following options:

To select a group in the filter:

a. Set the filter to one of the options under Groups. Ensure that the filter selected contains at least one active access point.

The dashboard context for the group is displayed.

b. Under Manage, click Devices > Access Points.

A list of access points is displayed in the List view.

To select an access point in the filter:

a. Set the filter to Global.

b. Under Manage, click Devices > Access Points.

A list of access points is displayed in the List view.

c. Click an access point listed under Device Name.

The dashboard context for the access point is displayed.

d. Under Manage, click Device > Access Point.

2. Click the Config icon.

The tabs to configure access points are displayed.

3. Click the Access Points tab.

The Access Points table is displayed.

4. To edit an AP, select an AP in the Access Points table, and then click the edit icon.

5. Click the Radio tab and select External Antenna to configure the antenna gain value. This option is available only if the selected AP supports external antennas.

6. Enter the Antenna Gain values in dBmDecibel-Milliwatts. dBm is a logarithmic measurement (integer) that is typically used in place of mW to represent receive-power level. AMP normalizes all signals to dBm, so that it is easy to evaluate performance between various vendors. for the 2.4GHz Band and 5GHz Band.

7. Click Save Settings.

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