Operating instructions
Operating
Instructions-71380
5
.
Set
the
mainframe
vertical
and
horizontal
modes
to
dis-
play
the
plug-in
units
used
and
adjust
the
intensity
and
focus
for
a
well-defined
display
.
See
the
oscilloscope
main-
frame
and
amplifier
unit
instruction
manuals
for
detailed
operating
instructions
.
Sweep
Functions
NORMAL
SWEEP
.
Perform
the
following
procedure
to
ob-
tain
a
normal
sweep
and
to
demonstrate the
function
of
the
related
controls
:
1
.
Perform
the
preceding
Setup
Procedure
.
2
.
Connect
a
0
.4-volt,
1-kilohertz
signal
from
the
main-
frame
calibrator
to
the
amplifier
unit
input
.
3
.
Set
the
amplifier
unit deflection factor
for
4
divisions
of
display
.
4
.
Adjust
the
LEVEL
control
for
a
stable
display
.
5
.
Turn
the
POSITION
control
and
note
that
the
trace
moves
horizontally
.
6
.
Turn
the
FINE
control
and
note
that
the
display
can
be
precisely
positioned
horizontally
.
7
.
Check
the
display
for
one
complete
cycle
per
division
.
If
necessary,
adjust
the
front-panel
SWPCAL
screwdriver
ad-
justment
for
one complete
cycle
per
division
over
the
center
8
graticule
divisions
.
Be
sure that
the timing
of
the
mainframe
calibrator
signal
is
accurate
to
within
0
.25%
(+20
to
+30
°
C)
.
8
.
Press
to
release
the
VARIABLE
(CAL
IN)
control
.
Turn
the
VARIABLE
(CAL
IN)
control
fully
counterclockwise
and
note
that
the displayed
sweep
rate
changes
to at
least
the
next
slower
TIME/DIV
switch
setting
(i
.e
.,
2
milli-
seconds/division)
.
Press
the
VARIABLE
(CAL
IN)
knob
in
to
the
calibrated
position
.
MAGNIFIED
SWEEP
.
Perform
the
following
procedure
to
obtain
a
X10
magnified
display
and
to
demonstrate the
function
of
the
related
controls
:
1
.
Obtain a
one
cycle
per
division
display
as
described
in
the
preceding
Normal
Sweep
procedure
.
2
.
Press
to
release
the
MAG
button
(X10)
.
Note
that
the
unmagnified
display
within
the
center
division
of
the
grati-
cule
is
magnified
to
about
10
divisions
.
3
.
Press
the
MAG
button
(X1)
.
Triggering
Functions
Perform
the
following
procedure
to
obtain
a
triggered
sweep
and
to
demonstrate
the
functions
of
the
related
controls
:
1
.
Obtain a
display
as
described
in
the
preceding
Normal
Sweep
procedure
.
2
.
Press
the
AUTO
MODE
button
and
turn
the
LEVEL
control
fully
counterclockwise
to
obtain
a
free-running
sweep
.
3
.
Slowly
turn
the
HOLDOFF
control
clockwise
and
note
that
a
stable
display
can be
obtained
at
several
positions
of
the
HOLD
OFF
control
.
Return
the
HOLDOFF
control
to
the
fully
counterclockwise
(MIN)
position
.
NOTE
The
HOLD
OFF
control
varies
the
sweep
hold-off
time
which
effectively
changes
the
repetition-rate
of
the
horizontal
sweep
signal
.
However,
its
pri-
mary
function
is
to
obtain
a
stable
display
of
complex
waveforms
which
are
otherwise
difficult
to
trigger
.
4
.
Press
the
AC,
AC
HF
REJ,
and
DC
COUPLING
buttons
for
both
the
+
and
-
positions
of
the
SLOPE
switch
and
check
for
a
stable
display
(LEVEL
control
may
be
adjusted,
if
necessary,
to
obtain
a
stable
display)
.
5
.
Apply
the
0
.4-volt,
1
kilohertz
signal
from
the
main-
frame
calibrator
to
the
amplifier
unit
and
to
the
EXT
TR
IG
IN
connector
.
6
.
Press
the
EXT
SOURCE
button
and
set
the
amplifier
unit
deflection
factor
for
a
4-division
display
.
7
.
Press
the
AC,
AC
HF
REJ,
and
DC
COUPLING
buttons
for
both
the
+
and
-
positions
of
the
SLOPE
switch
and
check
for
a
stable
display
(LEVEL
control
may
be
adjusted,
if
necessary,
for
a
stable
display)
.