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OSCILLOSCOPE
Figure 2-7
-
Set-Up Procedure
1.
Select the
waveform,
amplitude and frequency
range
desired.
2.
Switch
the generator
to
trig
with
sweep mode,
3.
Adjust the
START
frequency
to the desired value
with the
main
frequency
dial.
4.
With
the generator
connected
to the oscilloscope as
shown
in
Figure
2-7,
and
the oscilloscope
in
the
external horizontal
mode,
adjust
the horizontal
posi-
tion so that the
waveform
is
positioned
on
the
left
reticle
of the
oscilloscope.
5.
Turn
the
main
frequency
dial
to the
top frequency
desired,
and
adjust
the horizontal
gain
of the
oscillo-
scope so
that
the
waveform
is
positioned
on
the
extreme
right
hand
reticle,
or
any
convenient
reticle
of the
screen.
6.
Return
the generator
main
dial
to the
start
frequency
and
switch the
mode
control to
sweep and
hold
mode.
Adjust
the
sweep width
control
until
the
waveform
is
positioned
at
the
right
hand
reticle
as selected
in
step
5 above.
Note:
If
the
sweep
width
has
no
effect,
it
may
be
necessary to
manually
trigger
the generator
by
ro-
tating
the
trigger
level
control.
7.
Switch
the generator
to
cont with
sweep mode.
The
frequency
will
now
sweep between
the
START
frequency,
selected
by
the
main
dial
and
the stop
frequency
as
adjusted
by
the
sweep
width.
If
more
detailed calibration
of the
oscilloscope horizontal
axis
is
required,
the
main
dial
can be
used.
By
moving
the
dial
and
noting the
start
point of the sweep, the
hori-
zontal axis
can be
calibrated as a
function of frequency.
2.5.6 Floating
Output
This
instrument
is
shipped
from
the factory
with the
signal
ground
floating
above
chassis
ground,
unless other-
wise
specified at
the time of purchase.
If
a
common
signal/
cha^is ground
is
desired,
perform
the following modifi-
cation:
1.
Disconnect the
power
cord, loosen the
two
captive
thumb
screws
on
the
rear panel,
and
remove
the
rear panel.
2.
Slide
the dust cover
out
from
the
rear,
loosen the
two
screws
on
the
rear plate
and
the
two
screws
on
the
power
supply board
(at
bottom
of
chassis)
and
remove
the
power
supply board,
flipping
it
over
on
the
main
circuit
board.
3.
Solder
one end
of an
insulated
wire
to the
ground
lugs
(green
wires
of the
power
connector)
and
push
the
other
end through
the
small
opening
on
the
main
circuit
board.
4.
Solder the other
end
of the insulated wire to the
ground
terminal
on
the
power
supply board.
2-8
1/74
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