Radio Frequency Interference Statement
NOTE: This
equipment has been tested and found to comply with the limits for a
Class
B
digital Device, pursuant to
Part 15
of the FCC rules. These limits
are
designed to provide re
ason
able protection against
harmful
interference in a residential
installation.
This
equipment generates, uses and
can
radiated radio frequency energy
and,
if
not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that the
interference
will
not
occur
in a particular installation.
If
this equipment does cause
harmful
interference to radio or television reception, which
can
be determined by
turning
the
equipment off and on, the user is encouraged to try to correct the
interference by one or more
of
the following measures:
•
Reorient or relocate the receiving antenna.
•
Increase the separation between the equipment and receiver.
•
Connect the equipment into an outlet on a circuit different from that to which the
receiver
is
connected.
•
Consult the dealer or an experienced Radio/TV technician for help.
The user
is
cautioned that any changes or modifications not expressly
approved by the party responsible for compliance could void the user's
authority
to
operate the equipment.
RFI Suppression
In moving to the world of digital communications
via
computers, a new dimension
ofRFI may be encountered. In spite of the equipment manufacturers' diligence, each
new piece of electronic equipment
will
react differently in each separate environment.
Every amateur station
will
have its own unique layout, equipment variation, and
antenna installations. Experience has shown that these differences
are
related
to
the
total RF environment, and may be causative factors in RFI induced problems. The
suggestions given here may assist in resolving RFI problems you may encounter
in
your "unique" station.
1. Use shielded cable for
all
connections between equipment.
2. Make
all
interconnecting cables as short as practical. A balance should be
maintained between cable length and equipment proximity. At times simply moving
the video monitor one foot further from an interface or other device will solve the
"
scree
n hash" problem.
3 . Antenna
runs
should be kept away from equipment control lines and/or
interconnecting cables. lf it
is
necessary for such lines to cross each other they should
do
so
at
90
degree angles.
4.
Ground leads should be as short as possible and
go
to a GOOD EARTH GROUND.
5.
Interconnecting cables appearing to act as radiators or antennas should be looped
through a toroid.
Be
certain toroids, if used,
are
designed for the frequency
in
use.
e
Copyright 1990, Kantronica Co.,
Inc. All
Rights
Reserved.
Duplication of this manual without permiBaion of
Kantronica Co., Inc.
iB
prohibited.
3
DE1 200 Modem
April
3. 1990
