fSONA Sonabeam E Series, Installation Manual

Page: 73 / 87

Aligning Your SONAbeam Terminals
wireless at the speed of light
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Stage 2 – Finding your FSO Signal
With BOTH associated SONAbeam terminals visually aimed at each other, you are now
ready to commence the process of precisely aligning both terminals using a measurement
of the terminal’s received optical power. To accomplish this operation, you will need the
following for
EACH
SONAbeam terminal:
A local notebook computer with
SONAbeam Terminal Controller
(STC)
software attached to the SONAbeam’s
TERMINAL MGMNT RS232
(or USB)
port…
OR…
A digital voltmeter to monitor the
RCV SIG OUT
test
points, located in the Customer Interface Area, as
shown in
Figure 29
.
Figure 29 – Digital Voltmeter -
Signal Strength Terminals
AND…
Live network connections to each SONAbeam terminal
or a connected fiber optic loop between the terminals
TX
and
RX
ports… (This is necessary to stabilize the
laser transmission on both SONAbeam terminals.)
Aligning your SONAbeam terminals will comprise a systematic ‘search’ for the centre of
the combined optical signal from the terminal at the other side of the link, as registered
by a maximum received signal measured with the STC software, or digital voltmeter
measurement.
WARNING!
Align one terminal at a time, alternating between the two sides to iteratively
maximize your alignment.
Position yourself behind the optical head when making alignment adjustments so
as not to block the transmit and receive beams!
To conduct the measured alignment of your SONAbeam Terminals:
1.
Connect a notebook computer to each of your SONAbeam terminals, as
described in the
SONAbeam Terminal Controller Software User’s Guide
…
(Or, connect your digital voltmeters to the
RCV SIG OUT
test points on each
terminal.)
Voltmeter
terminals