Comtech EF Data HPCST-5000 - Manual (Page 55)

High-Power TWTA Satellite Terminals Single Thread System Installation
Rev.1 2–9
2.3.2 Vertical Pole Installation
2.3.2.1 Round Pole
Note: The following process is for a typical installation. Custom systems may be
ordered, and are not included in this manual.
To install the TWTA to a round vertical pole:
1. Set the unit on its side, with the mounting holes facing up.
2. Install the two 14” unistruts as follows:
a. Position a 14” unistrut (with the open side facing up) over one set of the
mounting holes on the TWTA.
b. Using four 5/16-18 bolts, 5/16” split lockwashers, and 5/16” flat washers,
and 5/16-18 nuts, attach the 14” unistrut to the TWTA.
Tighten the bolts firmly.
c. Repeat Steps 2.a. and 2.b. for the second 14” unistrut.
3. Install the pipe blocks as follows:
a. Install two spring nuts in each of four 14” unistruts (the two just mounted 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).