Heathkit IO-4550 User Manual

Page
8
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OPERATION
This section of the Manual explains the function of each
control, switch, and connector; gives a preset for each
control and switch; describes how to correlate between
time/cm and frequency; and provides operational examples.
ALTERNATE
PRIMARY
VOLTAGES
In
the
United
States
120
VAC
line
voltage
is
most
often
used,
while
in
other
countries
240
VAC
line
voltage
is
more
common.
If
your
line
voltage
is
consistently
below
115
volts
(or
below
230
volts
if
you
intend
to
Operate
the
Oscilloscope
on
240
volts),
perform
the
following
steps.
Otherwise,
proceed
to
“Control
Functions.”
NOTE:
Electrical
regulations
in
some
areas
require
a
special
line
cord
and/or
plug
for
240-volt
operation.
Replace
them
if
necessary.
(_)
Remove
the
top
and
bottom
covers
of
the
Oscilloscope.
If
your
line
voltage
is
consistently
below
115
(or
230)
volts:
(_) Shift the NOR/LOW switch to the LOW
position. (See Figure 23 in the “‘I\lustration
Booklet”).
\f you intend to operate your Oscilloscope on 240 volts:
position. This switch is located on top of the
rear subchassis, between the CRT and power
transformer.
(_) Shift the 120/240 slide switch to the 240 re)
(_ ) Remove the 1-ampere slow-blow fuse and install
the 1/2-ampere slow-blow fuse supplied with
this instrument. The fuseholder is located on the
bottom side of the rear subpanel.
( ) Reinstall the top and bottom covers. Be sure the cover
edges fit into the side rail grooves before you tighten
the two thumbscrews.
CONTROL FUNCTIONS
NOTE:
Some
illustrations
that
are
too
large
for
the
Operation
Manual
are
included
in
a
separate
“‘Illustration
Booklet.”
Use
these
large
illustrations
when
a
step
refers
to
the
“Illustration
Booklet.”
Refer to Figure 1 (in the ‘Illustration Booklet’) for the
location and explanation of the front panel controls and
switches,

Heathkit IO-4550 Specifications

General

Brand	Heathkit
Model	IO-4550
Category	Test Equipment
Language	English