User's Manual

Liberator-V1000 User Manual Rev 04v05
Page 23 of 85 FBN Doc #: FBN-0125_04v05
used only with a single-port V1000. The current optical alignment scope (shown in part (b) below) can be
used with single-port and dual-port V1000.
Figure 22 Optical Alignment Scopes (a) Single-port only (b) Single & Dual-port
Graphs in Appendix A give the required alignment voltage for a given RSSI value and a given range. Note that
the values of alignment voltage for a given range are only average values, assume clear air conditions, and will
vary slightly with geographic location. Therefore for the most accurate voltage prediction, it is strongly
encouraged to use the Liberator-Predict Link Calculator, available from the Fastback Networks website.
The table below shows alignment tolerance in terms of absolute position. However, it should be noted that
since all alignment is dependent on the angle subtended at the alignment bracket, the distance of the link is
not a factor in determining the required tolerance on the alignment angle, which should be the same for all
ranges.
Figure 23 – Alignment Positional Accuracy
4.6.1 Alignment Procedure
The following procedure achieves fast, accurate alignment. For mounting onto the pole, the supplied 4.5 mm
Allen key can be used. For fine antenna alignment, a 6mm Allen-Key / T-Bar tool is required (not included) to
adjust the M8 alignment bolts.
(a) Using the Alignment Bracket
Use a 6mm Allen-Key / T-bar tool to adjust the M8 bolts on the alignment bracket in azimuth and elevation
and repeat until fully aligned. Then lock-off using the M8 locking bolts for azimuth and elevation. These steps
are illustrated in the figures below.