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Tektronix 475A - Before Operating; Introduction; Safety Information

Tektronix 475A
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BEFORE
OPERATING
INTRODUCTION
The
Tektronix
475A
Oscilloscope
is
a
dual-channel
portable
instrument.
The
dual-channel
dc-to-250
MHz
vertical
system
provides
calibrated
deflection
factors
from
5
miltivolts
to
10
volts/division.
The
sweep
trigger
circuits
are
capable
of
stable
triggering
over
the
full
bandwidth
capabilities
of
the
vertical
deflection
system.
The
horizon-
tal
deflection
system
provides
calibrated
sweep
rates
from
0.5
second
to
0.01
microsecond/division
along
with
delayed
sweep
features
for
accurate
relative-time
.
measurements.
A
X10
magnifier
extends
the
calibrated
sweep
rate
to
1
nanosecond/division.
The
instrument
operates
over
a
wide
variation
of
line
voltages
and
frequencies.
Maximum
power
consumption
is
about
100
watts.
z.
The
Tektronix
DM44
Digital
Multimeter
measures
0
ohm
to
20
megohms,
0
dc
volt
to
1200
dc
volts
(+
or
—),
or
(using
the
temperature
probe)
~55°C
to
+150°C.
The
measurement
is
displayed
on
a
3-1/2
digital
display
while
the
oscilloscope
operates
normally.
The
digital
multimeter
and
oscilloscope
combine
to
provide
a
digital
readout
of
the
time
between
any
two
points
on
the
oscilloscope
display.
Both
time
measure-
ment
points
are
displayed
on
the
crt
at
the
same
time.
The
1/TIME
function
can
provide
direct
measurement
of
frequency.
SAFETY
INFORMATION
The
instrument
is
designed
to
operate
from
a
single-
phase
power
source
with
one
of
the
current-carrying
conductors
(the
Neutral
Conductor)
at
ground
(earth)
potential.
Operation
from
power
sources
where
both
current-carrying
conductors
are
live
with
respect
to
ground
(such
as
phase-to-phase
on
a
three-wire
system)
is
not
recommended,
since
only
the
Line
Conductor
has
over-current
(fuse}
protection
within
the
instrument.
The
instrument
has
a
three-wire
power
cord
with
a
three-terminal
polarized
plug
for
connection
to
the
power
source
and
safety-earth.
The
ground
(earth)
terminal
of
the
plug
is
directly
connected
to
the
instrument
frame.
For
electric-shock
protection,
insert
this
plug
only
in
a
mating
outlet
with
a
safety-earth
contact.
@
|
475A/DM44
Operators
1

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