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Tektronix 2247A

Tektronix 2247A
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3
i
3
Operator
Checks
and
Adjustments
Introduction
The
checks
and
adjustments
in
this
section
are
for
the
operator
and
involve
using
only
controls
and
adjustments
on
the
outside
of
the
Instrument.
Internal
adjustments
must
be
made
by
a
qualified
service
person.
Before
operating
the
Instrument
for
the
first
time
and
before
connecting
the
power,
refer
to
Section
1
“Preparation
for
Use”
to
prepare
the
instrument
for
the
Initial
start-up.
Verify
that
the
POWER
switch
Is
OFF
(out
position).
Plug
the
power
cord
into
a
power-source
outlet
that
supplies
a
voltage
within
the
operating
range
of
the
instrument's
power
supply.
NOTE
If
you
notice
an
improper
indication
or
instrument
mal-
function
during
these
procedures,
refer
the
instrument
to
a
qualified
service
person.
Initial
Setup
The
following
procedure may
be
used
to
set
up
front-panel
controls
when
the
instrument
is
first
turned
on
or
when
a
signal
is
not
being
applied
to
the
Input
connectors.
1.
Press
In
the
POWER
switch
button
(ON)
and
let
the
Instrument
warm
up
(20
minutes
Is
recommended
for
maximum
accuracy).
2.
Set
the
instrument
front-panel
controls
to
obtain
a
baseline
trace:
Vertical
Controls
VERTICAL
MODE
CH
1
POSITION
Center
the
trace
VOLTS/DIV
1Vv
VOLTS/DIV
VAR
Calibrated
detent
Channel
1
COUPLING
GND
2247A
Operators
4-1

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