Table of Contents
Advertisement
Performance Check/Calibration—Type 324
i.
Set the time-mark generator for 0.5-microsecond
markers.
j. Set the TR IG G E R control for a stable display in
the variable positive-slope area.
k. CHECK—CRT display for optimum linearity and
timing between the first and second vertical lines.
. ADJUST—C402 (see Fig. 5-12B) for optimum line
l
arity and timing between the first and second vertical
lines (use low-capacitance screwdriver).
m. Change the following control settings:
T IM E /D IV
X5 H O R IZ MAG
n.
Set the horizontal POSITION control so the last
marker of the magnified display is positioned to the
tenth vertical line.
o. Set the TR IG G ER control for a stable display in
the variable positive-slope area.
p. CHECK—CRT display for optimum linearity and
timing between the second and tenth vertical lines.
q. ADJUST—C470 (see Fig. 5-12B) for
arity
and timing between second and tenth vertical lines
(use low-capacitance screwdriver).
r. Position the third marker of the magnified display
to the first vertical line of the graticule.
s. ADJUST—C401 (see Fig. 5-12B) for
arity
and timing between the second and tenth vertical
lines (use low-capacitance screwdriver).
t. Repeat parts b through s of this step until opti
mum timing and linearity is obtained.
34. Check Normal Sweep Timing Accuracy
a. Push in the X5 H O R IZ MAG switch.
b.
CHECK—Using the T IM E /D IV
mark generator settings given in Table 5-4, check normal
5-24
1 ys
Pulled out
optimum line
optimum line
switch and time-
TABLE 5-4
Normal Sweep Timing Accuracy
T IM E /D IV
Time-mark
generator
switch
setting
output
1 ys
1 ys
2 ys
1 ys
5 ys
5 ys
10 ys
10 ys
10 ys
20 ys
50 ys
50 ys
.1 ms
0.1 ms
.2 ms
0.1 ms
.5 ms
0.5 ms
1 ms
1 ms
2 ms
1 ms
5 ms
5 ms
10 ms
10 ms
20 ms
10 ms
50 ms
50 ms
.1 s
0.1 s
0.1 s
.2 s
sweep
tim ing
within
the given
middle eight divisions of the display. Set the TR IG G ER
control as necessary for a stable display in the variable
positive-slope area.
35. Check Magnified Sweep Timing Accuracy
a. Pull out the X5 H O R IZ MAG switch.
b. CHECK—Using the T IM E /D IV
mark generator settings given in Table 5-5, check magni
fied timing within the given tolerances over the middle
eight-division
portion
of the
length. Set the TR IG G E R
stable display in the variable positive-slope area.
c. Disconnect all test equipment and remove the cali
bration shield.
36. Check/Adjust External Horizontal
Position Range
a. Change the following control settings:
Trig/Horiz Coupling
T IM E /D IV
X5 H O R IZ MAG
CRT display Allowable error
(markers/
for given
division)
accuracy
1
0.32 division
2
(within 4%)
1
1
2
1
1
2
0.24 division
1
(within 3%)
1
2
1
1
2
1
1
0.32 division
n
£
(within 4%)
tolerances over the
switch and time-
total
magnified
sweep
control as necessary for a
O
E X T T R IG OR H O R IZ
DC
E X T H O R IZ
Pushed in
Advertisement
Chapters
Table of Contents
Troubleshooting
