Mobile Station Grounding - Vertex Standard VX-1700 Operating Manual

Mobile Station Grounding

Although satisfactory grounding in most installations will
be achieved via the DC cable's negative lead and the an-
tenna system's coaxial cable shield, it may be necessary,
in some installations, to provide a direct ground connec-
tion at the mounting location of the transceiver. Due to
unexpected resonances which may naturally occur in any
location, improper communication system performance
may result from insufficient grounding. These symptoms
may include: RF feedback (resulting in distortion of your
transmitted signal), unintended scanning, blinking or blank-
ing of the frequency display, or loss of memory.
VX-1700 O
M
OBILE
M
M
OUNTING
Note that these conditions may occur in any communica-
tions installation. The VX-1700 includes extensive filter-
ing designed to minimize the chance of such problems;
however, random currents set up by insufficient RF ground-
ing can nullify such filtering. Bonding the rear panel GND
terminal of the VX-1700 transceiver to the vehicle or
vessel's ground system should clear up any such difficul-
ties.
Vertex Standard does not recommend the use of "on glass"
mobile antennas unless the shield of the coaxial cable is
securely grounded near the feedpoint of the antenna. Such
antennas frequently are responsible for the ground-related
difficulties described above.
I
NSTALLATION
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