Ubiquiti Networks airFibe5 - Manual (Page 2)

D
esign Guide
2
Alignment
Tips
• We recommend using a pair of installers in constant communication because in the fine-tuning stage, one installer makes
azimuth and elevation adjustments on one airFiber radio while the other installer reports the received signal level at the other
airFiber radio. (Fine-tuning is necessary because the main lobe of the receiver is more narrow than that of the transmitter, in both
azimuth and elevation.)
• To accurately align the airFiber radios for best performance, you MUST align only one end of the link at a time.
• As a safety precaution, ground the airFiber radios to grounded masts, poles, towers, or grounding bars. Use ground wires with
a minimum diameter of 8 AWG (10 mm
2 ) and a maximum length of 1 meter. For guidelines about grounding and lightning
protection, follow your local electrical regulatory codes.
• For more convenient alignment, you may consider using long-range scopes (not included) temporarily attached to your
airFiber radios.
• You may need to use additional hardware to compensate for issues such as the improper orientation of a mounting pole or
significant elevation differences between the airFiber radios.
Establishing a Preliminary Link
Adjust the positions of the airFiber radios to be within a few degrees of the line of sight between them. The Master must be aimed
first at the Slave because the Slave does not transmit any RF signal until it detects transmissions from the Master.
For both airFiber radios,
ensure ALL EIGHT Lock
Bolts (six are shown in the
diagram) on the Alignment
Bracket are sufficiently
loose by spinning each
washer by hand.
WARNING: All EIGHT Lock
Bolts MUST be loose to
avoid damage to the
airFiber housing.
Aim the Master at the
Slave. To adjust the
Master’s position on the
pole, loosen the Hex Nuts,
adjust the Pole Mount
Bracket and Pole Clamps,
and then tighten the
Hex Nuts.
Repeat on the Slave to
achieve the strongest
received signal level on its
numeric LED Display.
On both airFiber radios,
ensure the Azimuth
(AZ) and Elevation (EL)
Adjustment Bolts are
in the middle of their
adjustment ranges.
On the Master, adjust the
azimuth and elevation
of the Master until the
strongest received signal
level is displayed on its LED
Display*. Sweep the AZ
Adjustment Bolt through
its adjustment range,
and then sweep the EL
Adjustment Bolt through its
adjustment range.
Values on the LED Display
are displayed in negative (-)
dBm. For example, 87
represents a received signal
level of -87 dBm. Lower
values indicate stronger
received signal levels.
* If the LED Display indicates an overload condition , refer to the airFiber AF24 User Guide at: documentation.ubnt.com for more information.
On both airFiber radios,
attach a ground wire to
the Ground Bonding Point.
Secure the other end of
the ground wire to the
grounded mast, pole, tower,
or grounding bar.