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license). Note that all ODUs on the same site have to be either HIGH or LOW, if they use the same
frequency band.
The ODU version is indicated as HIGH or LOW on the box and on the ODU label.
Andrew antennas are installed on a steel tube with outer diameter 48 to 115 mm (0.3m and 0.6m),
65 to 115mm (0.8m) or 115 mm (1.2m and larger).
Aerial Oy antennas use 100mm installation tubes.
The ODU mounting brackets for separate installation are designed for a tube of 48 to 115 mm outer
diameter.
6 GHZ ODU WITH STANDARD WAVEGUIDE
6 GHZ ODU may use either N-type coaxial or PDR70 type waveguide interface. It should be installed
separately.
An installation bracket without any adapter is required for the ODU. Either a coaxial cable or flexible wave
guide is installed between the ODU and a separately installed antenna. In case of the waveguide ODU
version with PDR70 the flexible and twistable waveguide should have a UDR70 flange at the ODU end. The
gasket (O-ring) has to be installed for weather-proofing. The waveguide should be attached at the middle in
order to avoid vibration damage caused by wind. The attachment method must not change the shape of
the waveguide, the bending radius has to be sufficient and twisting should be minimized.
Note. If a "pressurized" e.g. a PDR-flange must interface another identical flange, then a double thickness
gasket (O-ring) is required or at least two normal-size gaskets are needed. Usually PDR will interface to UDR
with a normal gasket.
Figure 15. ODU 6 GHz with standard IEC waveguide flange. Mounting bracket without adapter.
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