Vertex Standard VX-1400, Руководство по эксплуатации

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VX-1400 O
PERATING
M
ANUAL
14
Mobile Station Grounding
Although satisfactory grounding in most installations will be achieved via the DC cable’s
negative lead and the antenna system’s coaxial cable shield, it may be necessary, in some
installations, to provide a direct ground connection at the mounting location of the trans-
ceiver. Due to unexpected resonances which may naturally occur in any location, im-
proper 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 blanking of the frequency display, or loss of memory.
Note that these conditions may occur in any communications installation. The
VX-1400
includes extensive filtering designed to minimize the chance of such problems; however,
random currents set up by insufficient RF grounding can nullify such filtering. Bonding
the rear panel
GND
terminal of the
VX-1400
transceiver to the vehicle or vessel’s ground
system should clear up any such difficulties.
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
M
OBILE
M
OUNTING