Task 12: Aligning ant ennas
Chapt er 6: Configurat ion and alignm ent
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phn- 2513_004v000 ( Oct 2012)
Task 12: Aligning antennas
Use the Installation Wizard to set the system into alignment mode, to achieve the lowest
possible link loss through correct antenna alignment, and to report on the performance of
the configured link.
Do not start antenna alignment until it is safe for the antennas to radiate RF,
that is, until the antennas and ODUs have been installed on the masts or poles
and no personnel are in front of the antennas.
For background on the alignment process, refer to
Introduction to antenna alignment
Check that the requirements in
For a 1+1 Hot Standby link with two antennas at each end of the link, perform
For an unprotected link, or for a 1+1 Hot Standby link that uses ODU couplers, perform
Introduction to antenna alignment
Licensed microwave links use parabolic dish antennas which have narrow beam widths
ranging from 4.7° down to 0.5°. Beam width depends on antenna gain, larger gain
antennas having narrower beam widths. It is most important that all PTP 800 antennas are
precisely aligned at the centre of the main beam. If antennas are not aligned at the centre
of the main beam, performance will be dramatically reduced.
The alignment process requires the elevation angle (vertical plane) and azimuth angle
(horizontal plane) to be adjusted. Antenna assemblies provide a mechanism for
independently adjusting in both planes whilst the antenna mounting bracket is securely
mounted to the mast. Please refer to the instructions provided with the antenna.
Alignment is achieved by monitoring the receive signal strength indicator (RSSI). This is
provided at the RFU BNC socket in the form of a dc voltage (RSSI Voltage).
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 ...