Notes on AC Power Sources
Computers
are sensitive tofluctuations in the powersupply at the wall socket,
from very short-duration (millionths
of
a second) voltage spikes, to
prolonged drops in current
or
voltage. This
is
rarely a problem unless you are
operatingin the vicinity
of
heavy electricalmachinery. The powersupply may
also
be
unstable if some appliance
or
office machine in the vicinity has a
defective switch which arcs when turned on
or
off.
Your
TRS-80Model II contains a specially designed, built-in
AC
line filter.
It
should eliminate all
but
the
most severe interference problems. Should you
still experience power-line interference, you should take some
or
all
of
the
following steps:
• Install bypass/isolation devices to the noisy appliance
• Fix the defective switch
• Install a separate power line
• Install a special line filter designed for use with computers and other
electronic equipment
In severe conditions, all actions may be required.
Power
line problems are rare and many times can be prevented by proper
choice
of
installation location.
The
more complex the system and the more
serious
the
application, the more consideration you should give to providing
an
ideal power-source for your Computer.
9
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