Aligning antennas
Chapter 6: Configuration and alignment
6-30
phn-2510_002v000 (Mar 2012)
Antenna alignment tones
This is the first method that may be used to monitor receive signal level during antenna
alignment.
The ODU emits audible tones during installation to assist with alignment. The pitch of the
alignment tone is proportional to the received power of the wireless signals. Adjust the
alignment of the unit, in both azimuth and elevation, until the highest pitch tone is
achieved.
The tones and their meanings are described in
Table 38
. In each of the states detailed in
the table, align the unit to give the highest pitch tone.
Table 38
Antenna alignment tones
State Name
Tone
Description
State Description
Pitch Indication
Free Channel
Search
Regular beep
Executing band scan
N/A
Scanning
Slow broken tone Not demodulating the
wanted signal
Rx Power
Synchronized
Fast broken tone
Demodulating the
wanted signal
Rx Power
Registered
Solid tone
Both Master and Slave
units exchanging Radio
layer MAC management
messages
Rx Power
Alarm
Fast broken dual
tone
A fatal error has
occurred.
The term ‘wanted signal’ refers to that of the peer unit being installed.
If, when in the Synchronized or Registered state, the tone varies wildly, there may be
interference or a fast fading link. Installing in this situation may not give a reliable link.
Investigate the cause of the problem.
Summary of Contents for PTP 250
Page 1: ...Cambium PTP 250 User Guide System Release 250 02 01 ...
Page 8: ...Safety and regulatory information VI phn 2510_002v000 Mar 2012 ...
Page 20: ...List of Tables xii phn 2510_002v000 Mar 2012 ...
Page 58: ...System management Chapter 1 Product description 1 30 phn 2510_002v000 Mar 2012 ...
Page 104: ...Limit of liability Chapter 3 Legal information 3 12 phn 2510_002v000 Mar 2012 ...
Page 122: ...Notifications Chapter 4 Reference information 4 18 phn 2510_002v000 Mar 2012 ...
Page 152: ...Installing the PoE power supply Chapter 5 Installation 5 30 phn 2510_002v000 Mar 2012 ...