3 GHz Carrier
Backhaul Radio
Model: AF-3X
LINK
GPS
MGMT
DATA
DATA
MGMT
GPS 
LINK
Introduction
Thank you for purchasing the Ubiquiti Networks® airFiber®
3 GHz Carrier Backhaul Radio. This Quick Start Guide is designed to guide you through the installation, show you how to access the airFiber Configuration Interface, and explain how to set up an airFiber link. This Quick Start Guide is for use with the airFiber AF-3X.
Warranty terms, safety notices, and compliance information are in the airFiber AF-3X User Guide, available at: downloads.ubnt.com
Package Contents
airFiber AF-3X |
GPS Antenna |
External GPS |
Metal Strap |
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Mount |
Antenna |
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Cable Ties |
airFiber PoE Adapter |
Power Cord |
Quick Start |
(Qty. 2) |
with Mounting |
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Guide |
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Bracket |
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(24V, 1A) |
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TERMS OF USE: Ubiquiti radio devices must be professionally installed. Shielded Ethernet cable and earth grounding must be used as conditions of product warranty. TOUGHCable™ is designed for outdoor installations. It is the customer’s responsibility to follow local country regulations, including operation within legal frequency channels, output power, and Dynamic Frequency Selection (DFS) requirements.
Installation Requirements
The airFiber AF-3X radio is designed for use with the airFiber X
AF-3G26-S45 antenna.
Other Requirements
•Clear line of sight between airFiber radios
•Clear view of the sky for proper GPS operation
•Vertical mounting orientation
•Mounting point:
•At least 1 m below the highest point on the structure
•For tower installations, at least 3 m below the top of the tower
•Ground wires – min. 10 AWG (5 mm2) and max. length: 1 m. As a safety precaution, ground the airFiber radio to grounded masts, poles, towers, or grounding bars.
WARNING: Failure to properly ground your airFiber radio will void your warranty.
• (Recommended) 2 Outdoor Gigabit PoE surge protectors
Note: For guidelines about grounding and lightning 
protection, follow your local electrical regulatory codes.
•Outdoor, shielded Category 6 (or above) cabling and shielded RJ-45 connectors are required for all wired Ethernet connections.
Hardware Overview
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Connects to |
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Chain 0: |
External GPS |
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Chain 1: |
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Antenna |
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Connects to |
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Connects to |
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+ 45° on |
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- 45° on |
airFiber Antenna |
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airFiber Antenna |
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LED
Panel
LINK
GPS
MGMT 
DATA
Port Cover
Ports
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Data |
Management |
Reset |
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Port |
Button |
Port |
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Management Port 10/100 Mbps, secured Ethernet port for configuration. In-Band Management is enabled by default in the airFiber Configuration Interface. When In-Band Management is disabled, the MGMT port is the only port that can monitor, configure, and/or update firmware.
Reset Button To reset to factory defaults, press and hold the Reset button for more than 10 seconds while the device is already powered on.
Data Port Gigabit PoE port for handling all user traffic and powering the device.
LEDs
Signal LEDs
Signal 4 LED will light blue when on.
Signal 3 LED will light green when on.
Signal 2 LED will light yellow when on.
Signal 1 LED will light red when on.
Bootup to airOS When powering on, the Power, GPS, LINK, and Signal 1-4 LEDs light on. Once the CPU code takes over, the
GPS, LINK, and Signal 1-3 LEDs turn off. Signal 4 LED remains on to indicate the boot sequence is underway.
Initializing airFiber Software When the airFiber application begins to boot under airOS, the Signal 4 LED goes from solidly on to a 2.5 Hz flash. This continues until the AF-3X is fully booted.
Signal Level Once fully booted, the Signal 1-4 LEDs act as a bar graph showing how close the AF-3X is to ideal aiming. This is auto-scaled based on the link range, the antenna gains, and the configured TX power of the remote AF-3X. Each Signal LED has three possible states: On, Flashing, and Off. All Signal LEDs would be solidly on in an ideal link. If the link has a 1 dB loss, the Signal4LED will flash; a 2 dB loss and the Signal 4 LED will turn off. The full bar graph LED states are shown below.
dB |
0 |
-1 |
-2 -3 |
-4 -5 |
-6 |
-7 -8 |
-9 -10 |
-11 |
-12 |
-13 |
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loss |
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1 |
F |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
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1 |
1 |
1 |
F |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
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1 |
1 |
1 |
1 |
1 |
F |
F |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
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1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
F |
F |
F |
0 |
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0 = Off, 1 = On, F = Flashing
Additional LEDs
LED |
State |
Status |
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Off |
RF Off |
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Short Flash* |
Syncing |
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LINK |
Normal Flash* |
Beaconing |
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Long Flash* |
Registering |
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On |
Operational |
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Off |
No GPS Synchronization |
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GPS |
Normal Flash* |
Non-Operational (Weak Signal) |
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On |
Operational (Strong Signal) |
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Off |
No Ethernet Link |
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MGMT |
On |
Ethernet Link Established |
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Random Flashing |
Ethernet Activity |
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Off |
No Ethernet Link |
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DATA |
On |
Ethernet Link Established |
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Random Flashing |
Ethernet Activity |
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Off |
No Power |
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On |
Powered On |
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* Short Flash (1:3 on/off cycle) |
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Normal Flash (1:1 on/off cycle) |
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Long Flash (3:1 on/off cycle) |
Installation Overview
We recommend that you configure your paired AF-3X radios before site installation. The overview below summarizes the installation procedure, and the subsequent sections provide detailed installation information.
•Connect the airFiber PoE Adapter to the DATA port, and connect your computer to the MGMT port.
•Configure the AF-3X.
•Install a ground wire and mount the AF-3X on an airFiber X antenna.
•At the installation site, install the airFiber X antenna with the mounted AF-3X radio (see the antenna’s Quick Start Guide for installation instructions).
•Secure the ground wire and mount the GPS antenna.
•Establish and optimize the RF link.
Connecting Power over Ethernet
1.Lift the release latch on the bottom of the AF-3X and slide the Port Cover off.
2. Connect an Ethernet cable to the DATA port.
3.Connect the Ethernet cable from the DATA port to the Ethernet port labeled POE on the airFiber PoE Adapter.
WARNING: Use only the included airFiber PoE Adapter,
Model: GP-H240-100G-4. Failure to do so can damage the unit and void the product warranty.
4.Connect the Power Cord to the power port on the airFiber PoE Adapter. Connect the other end of the Power Cord to a power source.
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