17
Chapter 5: Wireless Tab
airFiber
®
AF-5X User Guide
Ubiquiti Networks, Inc.
•
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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.
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Select the new country.
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Channel Bandwidth
Select the appropriate channel size:
10, 20, 30, 40, or 50 MHz.
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 AF-5X. 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 AF-5X 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 41.
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 is
enabled, and Maximum Modulation Rate is displayed.
This allows the AF-5X to automatically adjust the
modulation rate to changing RF signal conditions. Under
certain conditions, you may prefer to lock the Maximum
Modulation Rate to a lower setting to improve link
performance.
When Automatic Rate Adaptation is disabled, Modulation
Rate is displayed. Lock the Modulation Rate to the setting
of your choice.
Select one of the available modulation rates:
• 8x (256QAM MIMO)
• 6x (64QAM MIMO)
• 4x (16QAM MIMO)
• 2x (QPSK MIMO)
• 1x (½ Rate QPSK xRT)
• ¼x (¼ Rate QPSK xRT)
Frequency Settings
The Valid Frequencies for your Country Code selection are
displayed. Ensure that you use frequencies that comply
with the local country regulations.
Frequency
Enter a valid frequency. The current state is
displayed.
Note:
The Master and Slave should have the same
Frequency setting.
DFS Frequencies
If you have Dynamic Frequency Selection (DFS)
frequencies, then you have three sets of Frequency
options.
Frequency 1-3
Enter a valid frequency (the same
frequency will be used for both transmit and receive). The
Current State is displayed.
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