Task 12: Aligning ant ennas
Chapt er 6: Configurat ion and alignm ent
6- 102
phn- 2513_004v000 ( Oct 2012)
Aligning one end
Align the antenna at one end of the link while keeping the antenna at the other end of the
link stationary.
To find the correct elevation and azimuth angles at one end, proceed as follows:
1
Perform a complete sweep of the elevation range of the antenna by adjusting
the elevation angle incrementally. The extent of the sweep depends upon
antenna gain. Measure RSSI voltage at each point in the sweep.
2
The resulting plot of voltage against elevation should be symmetrical. Record
the elevation angle that appears to be at the axis of symmetry, as this is likely to
be the correct angle for aligning with the other antenna (
shows the axis of symmetry occurring at a voltage ‘peak’.
However, it is possible for the axis of symmetry (and therefore the correct
elevation angle) to occur at a voltage ‘trough’ (
3
Set the elevation angle to the axis of symmetry, as identified in the plot.
4
Perform a complete sweep of the azimuth range of the antenna and record the
resulting plot of voltage against azimuth.
5
Set azimuth angle to the centre of the range over which the maximum RSSI
voltage is recorded.
Figu r e 1 6 7
Sym m et rical relat ionship bet ween volt age and alignm ent
Summary of Contents for PTP 800 Series
Page 1: ...Cambium PTP 800 Series User Guide System Release 800 05 02 ...
Page 40: ...Licensing requirements About This User Guide 10 phn 2513_004v000 Oct 2012 ...
Page 232: ...Limit of liability Chapter 3 Legal information 3 22 phn 2513_004v000 Oct 2012 ...
Page 322: ...Radiation hazard assessm ent Chapter 4 Reference information 4 90 phn 2513_004v000 Oct 2012 ...
Page 428: ...Replacing IRFU components Chapter 5 Installation 5 106 phn 2513_004v000 Oct 2012 ...
Page 630: ...Using recovery mode Chapter 7 Operation 7 78 phn 2513_004v000 Oct 2012 ...