Integrator’s Reference Manual
7-28 80-99208-1 Rev. D
Note
Globalstar frequencies are attenuated by wet snow. When mountin g the
antenna in a snowy location, you must make provisio ns to preven t snow
buildup on the antenna. Wet ice/snow must be r estrict ed t o a max imum
thickness of 20 centimeters (8 inches) by suitably mount ing the
antenna. See Mounting and Sealing Antennas on Poles on page 7-29.
Securing Antenna Cables
When connecting the antenna cables, the recommended
torque for the SMA connectors is 0.79 to 1.13 N⋅m (7 to 10
in⋅lb).
Mounting and Sealing Antennas on Flat Surfaces
You can mount the modem antenna (DRA) on a flat surface
with six M4 screws. Depending on whether the surface is
smooth or rough, different methods are recommended for
sealing out moisture and dirt from the antenna’s SMA
connectors, which are not sealing conn ectors.
If the surface is smooth, flat, and solid , you can use an O-ring
to protect the antenna’s connectors. The O-ring should be
2.050 inches in diameter by 0.103 inch wide, to fit within the
groove on the bottom of the antenna. Silicone or ethylene-
propylene is the preferred material.
A recommended source is:
Parker Seal Group
18321 Jamboree Rd.
Irvine, CA 92612-1073
Tel: 800/272-7537
Fax: 949/851-2127
Parker part number: 2-137 E515-80
Description: O-ring, ethylene-p ropylene, 2.050 inches
diameter by 0.103 inch thick, 80 durometer
If you are mounting the antenna on r ough surfaces, surfaces
which have already suffered signi ficant environmental
damage (pitting, peeling paint, etc.), or surfaces that are not
sufficiently flat, it is recommended that you do not use an
O-ring. O-rings need smooth, flat surfaces to work.