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Chapter 5: Wireless Tab

airFiber

X User Guide

Ubiquiti Networks, Inc.

Country Code

Each country has its own power level

and frequency regulations.

To ensure the airFiber X radio

operates under the necessary regulatory compliance rules,
you must select the country where your device will be used

The frequency settings and output power limits will
be tuned according to the regulations of the selected
country. For details, refer to this table,

“Frequency Ranges

and Power Levels per Country/Region” on page 49

This radio is restricted to use with a license and to use only in
certain EU countries or geographical areas of EU countries.

•

Change

To select a new country, click

Change

Note:

U.S. product versions are locked to the U.S.

Country Code to ensure compliance with FCC
regulations.

Country

Select the new country.

I agree to these terms of use

Check this box; you

must agree to the

Terms of Use

to use the product.

Accept

Saves your change.

Cancel

Discards your change.

Channel Bandwidth

Select the appropriate channel size:

• AF-2X and AF-3X:

3.5

MHz

• AF-5X only:

, or

MHz

Note:

. The available channel bandwidths depend

on the regulatory requirements of the currently
selected country or region.

Frame Length

(Available on AF-2X and AF-3X only.) Use

this to specify the frame length of the radio:

default

2.0ms

2.5ms

4.0ms,

5ms

. The frame length must be

the same on both Master and Slave radios. The

default

value corresponds to

5ms for the 3.5 MHz and 5 MHz

bandwidths, or

2.0ms

for all other bandwidths.

Note:

. The AF-5X uses a frame length of 2.0ms (this

value cannot be changed).

Master TX Duty Cycle

Use this to change the duty cycle

of the RF link (the Master’s TX percentage). Choose one of
the following values:

25%

33%

50%

67%

, or

75%

Output Power (EIRP)

Defines the maximum average

transmit output power (in dBm) of the airFiber X radio.

To specify the output power, use the slider or manually
enter the output power value. The transmit power level
maximum is limited according to country regulations.

Note:

The

Antenna Gain

and

Cable Loss

should be

configured before the

Output Power

. This is because

the range of the

Output Power

field is affected by

the

Antenna Gain

and

Cable Loss

values – changing

the antenna gain or cable loss adjusts the maximum
and minimum values you can select using the

Output Power

slider. Since the

Output Power

already includes the antenna gain and cable loss, it
represents EIRP; therefore, the value of

Output Power

is actually the total power the radio is transmitting
over the air. The current transmit power is displayed
by the TX Power EIRP setting on the

Main

tab.

Note:

The airFiber X radio may limit the output

power to a value less than the value specified
by this field, to comply with regulatory region
requirements. For a list of maximum output power
values by country and region, refer to

“Frequency

Ranges and Power Levels per Country/Region” on
page 49

Antenna Gain

Enter the gain in dBi of the antenna that is

used in your installation. An improper value could cause
DFS false detections when operating on DFS frequencies.

Cable Loss

Enter the cable loss in dB of the cable that is

used in your installation. An improper value could cause
DFS false detections when operating on DFS frequencies.

Maximum Modulation Rate or Modulation Rate

Higher

modulations support greater throughput but generally
require stronger RF signals and a higher Signal-to-Noise
Ratio (SNR). By default,

Automatic Rate Adaptation