Ubiquiti airFiber 24, User Manual

Page: 17 / 68

13
Chapter 2: Installation airFiber AF-24/AF-24HD User Guide
Ubiquiti Networks, Inc.
Alignment
Tips
• Fine-tuning is best achieved by a pair of installers with
a dedicated, two-way communication link: one installer
makes adjustments on one airFiber radio while the other
installer reports the received signal level at the other
airFiber radio. Fine-tuning (see
“Fine-Tuning the Link”
on page 15 ) is necessary because the main lobe of
the receiver is narrower 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.
• 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.
Determining the Received Signal Level
There are three ways to determine the received signal
level:
• LED Display (See the following section,
Using the LED
Display .)
• airFiber Configuration Interface (See “Using the
airFiber Configuration Interface” on page 15 .)
• Audio tone (Optional equipment required. See “Using
the Audio Tone” on page 18 .)
Using the LED Display
Establishing a Preliminary Link
Adjust the positions of the Master and the Slave to
establish a preliminary link. This requires the Master
and Slave to be within a few degrees of the line of sight
between the airFiber radios.
Note: 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 .
1. For the Master and Slave , ensure the eight Lock Bolts on
the Alignment Bracket are sufficiently loose by spinning
each washer by hand.
WARNING: All Lock Bolts MUST be loose to avoid
damage to the airFiber housing.
2. For the Master and Slave , ensure the Azimuth (AZ) and
Elevation (EL) Adjustment Bolts are in the middle of their
adjustment ranges.
Elevation (EL)
Adjustment Bolt
Azimuth (AZ)
Adjustment Bolt