Comtech EF Data HPCST-5000 - Manual (Page 95)

High-Power TWTA Satellite Terminals Redundant System Installation
Rev. 1 3–11
3.3.2 Vertical Pole Installation
3.3.2.1 Round Pole
Note: The following process is for a typical installation. Custom systems may be
ordered, and are beyond the scope of this manual.
To install the TWTA to a round vertical pole:
1) Install the pipe blocks as follows:
a) Install two spring nuts in each of four 14” unistruts (the two on the TWTA,
and two additional).
Be sure to position the spring nuts in the unistruts wide enough apart so that
when the pipe blocks are installed, they will clear the pole when the unit is
lifted into place for installation.
b) Install each spring nut as follows:
(1) Place the spring nut in the unistrut channel, spring side down, with its
wide side parallel with the unistrut channel.
(2) Press down on
the spring nut to
compress the
spring, and rotate
the nut 90
°
(i.e.,
perpendicular to
the unistrut).
(3) Release pressure
on the spring nut.
(4) Repeat Steps 1.b.(1) through 1.b.(3) for each spring nut.
c. Using four 5/16-18 bolts, 5/16” split lockwashers, and 5/16” flat washers,
loosely secure the pipe blocks to the spring nuts.