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1,
With
the
Output Amplifier
Board
in
place
and
the
Schmitt
&
Switch
Board
on
the
extender,
connect
the
probe
of
the
scope with
the
W
plug-
in
to
the
upper end
of
R2
on
the
Output Amplifier Board,
Set
the
func-
tion
switch
to
square
wave
and
adjust
R28
on
the
Schmitt & Switch
Board
for
5,00
volts
peak
to
peak.
Trim
R31
for
balance about ground,
NOTE
In
preparation
for the
adjustments on
the
Output Amplifier Board,
the
following
ad-
justments
must
be
made
on
the
Sine
Con-
verter
Board
(017-103-61),
2,
With
only
the Sine
Converter Board on
the
extender and other
boards
in
place,
connect
the
probe
of the
scope with
the
W
plug-in
to
the
upper
end
of
R2
on
the
Output Amplifier Board,
Set
the function
switch
to
sine
wave
and
adjust
R40
for
balance about ground.
Adjust
R41
so
that
the sine
amplitude equals
the
amplitude
of
the triangle
wave.
The
two
waveforms
can
be
observed by
switching
the
function
between
sine
and
triangle.
Both
waveforms
should be
5
volts
peak
to
peak,
NOTE
The remaining
adjustments
in
this
sec-
tion
are
made
with
the
Output Amplifier
Board
(017-119-61) on
the
extender and
the
other
boards
in
place.
3.
Connect an
oscilloscope
to
the
amplifier output
BNC
and terminate
the
scope end
of
the
connection with
a
precise 50
jt.
load.
Set the
amplitude
range
to
XI.
4.
With
the function
switch on
R
and
the
frequency switch
set to
X.
01
and
5.
99,
connect
a
voltmeter
to the
buffer amplifier
summing
node
(TPl).
Put enough
resistance
in
series with
the
voltmeter
so
that
no
oscilla-
tions
appear on
the
scope
(about
5
to 10
K).
Adjust
R7
for
zero
volts
±100
jiv.
5.
Connect
the
voltmeter
to the
output
of the
buffer amplifier
(TP2) and
trim
R3
or
R4
for
zero
volts ±1
mv.
It
should not be
necessary
to
retrim
R3
or
R4
unless
some
transistors
in
the buffer
amplifier are
changed.
6.
Place
a
voltmeter across
the
50n.
termination.
Set
the
three
amplitude
decade
switches
to
remote
(this
programs
a
zero amplitude).
Set
the
output amplifier
zero potentiometer
(R27) for
zero on
the
voltmeter.
5-5
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