User's Manual

IDU installation
SkyZhone 45 Installation Guide
33
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made operational before final azimuth and elevation adjustments can be made
using the Received Signal Strength Indication (RSSI) test points.
Figure 11: RSSI test points
The voltage range of the RSSI indication is very small, varying from 0.9 VDC
to 1.4 VDC. Use a digital voltmeter capable of resolution at these ranges (for
example, a Fluke model 77), and adjust the antenna’s azimuth and tilt until an
optimal signal is reached as indicated by the voltage at the RSSI connection.
A higher voltage indicates more signal strength. Use care not to “peak” the
antenna on a side lobe, which is often about 20 dB below the main lobe in
strength. The antenna should be on the approximate azimuth that was
calculated using a compass and map.
IDU installation
The IDU units are installed inside at each end of the microwave link, within
300 feet of the ODU, and are protected from rain or condensing moisture.
Secure the IDU in the rack. Rack mount brackets are provided to install the
unit into a 19- or 23-in rack as shown in Figure 12
Caution: To prevent damage to the system, use only the screws
provided.
Note that all of the IDU connections are made on the rear panel.
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