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c
I
(
Model 1331A
5-39.
Procedure.
a. Set
Model
1331A controls as
follows
:
WRITE
..................................
in
INTENSITY
.
.
.
.
.
. .
.
. .
. .
.
.
.
. . .
.
. . .
.
.
.
. .
ccw
PERSISTENCE
. .
. . .
.
. .
.
.
. .
.
.
. . . . . . . .
.
. .
cw
POSITION (HORIZ
and
VERT)
....
centered
b.
Apply
70-Hz,
1 V p-p
sine
wave
from
sine
wave
generator to X
INPUT.
c.
Apply 1-Hz, IV p-p
sine
wave from
oscil-
la tor
to Y INPUT.
d. Set
pulse
generator
controls
as follows:
repetition
rate......................
1000
Hz
pulse width
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
us
pulse
amplitude
. . . . . . . . . . . . . . . . . . . . . . . . .
1
V
Pulse polarity.
. . . . . . . . . . . . . . .
.
.
. .
.
n
egative
Performance Check
15 minutes,
except
for
a small amount
of
permis-
sible
degradation in outer
0.5
division of viewing
area.
5-42.
Equipment.
Oscillator.
5-43.
Procedure.
a. Set Model 1331A
controls
as
follows:
WRITE..
..........
.
.................
....
in
INTENSITY
. . . . .
.
.
.
. . .
.
.
.
. . .
.
. .
as required
PERSISTENCE
. . . . . . . . .
.
. .
.
. .
. . . .
.
.
. . .
.
cw
POSITION (HORIZ
a
nd
VERT)...
.
centered
b.
Connect
5-Hz,
1 V p-p
sine
wa
ve from oscil-
lator
to Y
INPUT.
c. Using
POSITION
controls,
center trace verti-
cally
a
nd position it horizon
tally
just
off CRT
viewing
e. Connect
output
of
pulse generator to Z
area.
INPUT.
f
. Press and release
ERASE
pushbutton.
g.
Momentarily
switch
pulse
amplitude to posi-
tive, then back
to negative. Dots
sh all
be written
over entire CRT
viewing
area.
A
small amount
of
degradation is permissible
in the
outer 0.5
division
of graticule.
h.
If
necessary,
perform writing
rate
adjustment
(paragraph 5-75).
5-40. STORE TIME
CHECK.
5·41. Specification. Any
pattern
stored
sh
a
ll
re-
main
without
discernible
degradation
for
at
least
d.
Press
and
release
ERASE pushbutton.
e.
Using
HORIZ POSITION
control,
sweep trace
completely
across
CRT
viewing area.
Trace shall re-
main
visible a
t least
60 seconds.
f.
Repeat
steps c, d,
and
e. Immedia
tely press
STORE
pushbutton
and n
ote
condition
of
trace.
g.
Wait 15 minutes, then
observe trace. Trace
shall
be
as
n
oted
in
s tep f
with
no
positive or
nega-
tive fade.
A small amount
of
degradation is permis-
sible
in
the
outer
0.5
division
of the
graticule.
h.
If
necessary,
perform
store time a
djustment
(paragraph 5-79).
5-5/
5-6
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