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(
Model 1331A
I
~0.24---.j
DIVISIONS
Figure
5-1.
Phase
Shift
Trace
Note
1331AIC·
A·
16
Specification
a
pplies
only
to
instru-
ments
connected for
differential
input.
Refer to
Section
II.
5-22.
Equipment.
a.
Sine wave generator.
b.
Oscilloscope.
5-23. Procedure.
a.
Set
Model 1331A
controls as follows:
WRITE
.....
.
............................
in
INTENSITY
. . . . . . . . . . . . . .
.
. .
. . .
as required
PERSISTENCE.
. . . .
.
.
. . . .
. . . . . . .
. .
. .
. .
ccw
POSITION (HORIZ
and
VERT)....
centered
b.
Place
shorting
connector
on
X
INPUT.
c.
Apply
10-kHz output of sine
wave generator
between
shorting connector and chassis.
Monitor
with
oscilloscope
and
adjust amplitude
to
3V
p-p.
d.
Observe
horizontal deflection on
CRT.
De-
flection
shall
be
equal
to or
less
than
1.5
minor div.
e.
Move
shorting
connector
and
output
of sine
wave generator to
Y INPUT.
f.
Observe
vertical deflection
on
CRT. Deflection
shall
be
equal
to
or
less
than 1.2 minor div.
5-24.
BANDWIDTH
CHECKS.
5-25.
Specification.
Ba
ndwidth
of
both
the x-
and y-axis amplifiers shall
be
down
not more than
3
dB
a
t 1 MHz.
5-26.
Equipment.
a. Sine wave
generator.
Performance
Check
b.
Oscilloscope.
5-27.
Procedure.
a.
Set Model
1331A
controls as
follows:
WRITE
...........
..
.
.
........
.
...
..
.....
in
INTENSITY
. . . .
.
.
. .
.
.
. .
.
.
. .
. .
. .
as
required
PERSISTENCE.
.
.
..
. .
.
.
.
. .
. .
.
.
.
.
.
.. .
.
.
ccw
POSITION (HORIZ
and
VERT)_
. . .
centered
b. Apply
10-kHz
output
of sine
wave generator
to X
INPUT.
Adjust amplitude for 10-div deflection
on
CRT.
c.
Using
oscilloscope,
measure
and
n
ote
am·
plitude of sine wave at
INPUT.
d.
Cha
nge
frequency
of sine wave generator
to
1
MHz.
e.
Adjust
a
mplitude
at
INPUT to
match
that
noted in
step
c.
f. Observe deflection on
CRT.
Deflection
shall
equal
or exceed
7.07
div.
g.
Change
output of
sin
e wave
generator to Y
INPUT. Adjust
amplitude for
8-div deflection
on CRT.
h.
Repeat
steps
c,
d,
and
e.
i.
Observe deflection on CRT.
Deflection
shall
equa
l
or
exceed 5.65
div.
5-28.
Z-AXIS AMPLIFIER CHECKS.
5-29.
Specification.
Risetime
of the
Z-axis
am·
plifier
sh
all
be
equal
to or
less
than
70
ns. Bandwidth
s
hall
be
equal to or
greater
than
5
MHz. The
CRT
shall
be
blanked
by
a voltage
equal
to
or
less
nega-
tive
than -IV at the
Z INPUT.
The
CRT shall
be
driven
to
ma
ximum
brightness
by
a voltage
equal
to
or
less
than
1 V
at
the Z
INPUT.
:>-.'W.
Equipment.
a.
Pulse
generator.
b.
Oscilloscope.
c. Sine
wave generator.
d.
50:1
divider
probe.
5-31. Procedure.
a.
Turn LINE switch
to
off.
b.
Disable
high
voltage
power
supply
by
dis-
connecting
collector
lead to
Q5
(blue
wire
to A3).
5.3
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