27
5.7
Antenna Alignment
Antennas used for licensed microwave applications have very narrow beamwidth and thus installation
requires precise antenna adjustments to achieve a correct antenna alignment.
The ODU is equipped with an RSSI port. The voltage at this connector is proportional to the RSSI. The
alignment process is intended to achieve the highest voltage signal. The following diagram shows typical
values seen by the ODU.
Voltage Reading
Signal Strength
0.1 V
-90 dBm
0.8 V
-80 dBm
1.4 V
-70 dBm
2 V
-60 dBm
2.6 V
-50 dBm
3.2 V
-40 dBm
3.8 V
-30 dBm
4.5 V
-20 dBm
Table 5-2: typical voltage reading vs. Rx signal.
Summary of Contents for SKYWAY-LM Series
Page 1: ...1 SKYWAY LM SERIES PTP Microwave Radio System User s Guide APRIL 2010 Rev 1 6 PN 1552601 ...
Page 21: ...21 Figure 5 2 The backside of the ODU rectangular waveguide version shown ...
Page 25: ...25 Figure 5 9 Loosened plate Figure 5 10 Rotating the antenna waveguide by 90 degrees ...
Page 50: ...50 Figure 6 19 System Reboot Screen ...
Page 57: ...57 Figure 8 3 Serial Interface Menu Structure ...