User's Manual

10271450001 Revision D 4–12 Installing ODUs Hub installation
2. Determine (approximately) how high on the mast to install
the temporary installation collar:
a. Determine the desired ODU/antenna installation
height.
Generally, the ODU height is determined as part of
the RF survey and is specified in the hub planning
documents.
If the ODU height is not specified, install the HT
ODU as high as possible on the mast.
The ODU/antenna must be high enough to clear
any obstructions.
b. Refer to figure 4-7 for the collar position relative to
the installed antenna position.
As shown in figure 4-7, when the antenna is installed
(later), the top of the collar is below the antenna
center and above the bottom of the antenna.
Antenna
(front)
Temporary
installation collar
Antenna
center
vertical
The antenna and
mount are not
installed yet.
They are shown
here to indicate
where the
temporary
installation collar
should be installed.
T0006002
Antenna
bottom
To p
of
collar
Some antenna models may be smaller
than the antenna shown here.
Mast
Figure 4-7 Collar height relative to desired antenna height