Table of Contents
Advertisement
Calibration— Type 323
16. Adjust Limit Centering
a. Set the VOLTS/DIV switch to 5 DIV CAL
b. Position the bottom of the display to the first grati
cule line below the center horizontal line.
c. Reduce the display to exactly two divisions with the
VARIABLE VOLTS/DIV control.
d. Position the top of the display to the top horizontal
line of the graticule. Note the compression (reduction in
amplitude) of the display.
e. Position the bottom of the display to the bottom hori
zontal line of the graticule. Again note the compression of
the display.
f. Return the display to the position which produces the
most compression of the display.
g. ADJUST— Limit Centering adjustment, R66 (see Fig.
6-7B), for maximum display amplitude (least compression).
Compression or expansion should not exceed 0.1 division.
17. Adjust Vertical X 1 Gain
a. Change the following control settings:
VOLTS/DIV
VARIABLE VOLTS/DIV
b. Connect the standard amplitude calibrator (067-0502-00)
output connector to the VERT INPUT connector with the 42-
inch BNC cable.
c. Set the standard amplitude calibrator for a 50-milli
volt square-wave output.
d. Center the display about the center horizontal line
with the vertical POSITION control.
e. CHECK— CRT display for five divisions of deflection.
f. ADJUST—VERT X I GAIN adjustment, R69 (see Fig.
6-7B), for exactly five divisions of deflection.
18. Adjust Vertical X lO Gain
a. Set the standard amplitude calibrator for a five-milli
volt square-wave output.
b. Pull the X lO VERT GAIN switch.
c. Center the display about the center horizontal line
with the vertical POSITION control.
d. CHECK—CRT display for five divisions of deflection.
e. ADJUST— VERT X lO GAIN adjustment, R46 (see Fig.
6-7B), for exactly five divisions of deflection.
19. Check Vertical Deflection Accuracy
a. Push the X lO VERT GAIN switch in.
6-12
O
O
.01
CAL
O
b.
CHECK— Using the VOLTS/DIV switch and standard
amplitude calibrator settings given in Table 6-2, check ver
tical deflection within 3% in each position of the VOLTS/DIV
switch.
TABLE 6 -2
Vertical Deflection Accuracy
Standard
VOLTS/DIV
amplitude
switch
calibrator
setting
output
.01
50 millivolts
.02
0.1 volt
.05
0.2 volt
.1
0.5 volt
.2
1 volt
.5
2 volts
1
5 volts
2
10 volts
5
20 volts
10
50 volts
20
100 volts
2 0. Check Variable Volts/Division Control
Range
a. Set the standard amplitude calibrator for a 50-milli
volt square-wave output.
b. Change the following control settings:
VOLTS/DIV
INPUT
c. Center the display about the center horizontal line
with the vertical POSITION control.
d. CHECK— Rotate
the
fully counterclockwise.
Display must be reduced to two
divisions or less (indicates adequate range for continuously
variable deflection factor between the calibrated steps).
21. Check Input Coupling Switch Operation
a. Set the VARIABLE VOLTS/DIV control to CAL.
b. Set the standard amplitude calibrator for a 20-milli
volt square-wave output.
c. Center the display about the center horizontal line
with the vertical POSITION control.
Maximum
error for
Vertical
deflection
± 3 %
accuracy
in
divisions
(divisions)
Previously set
5
exactly in
step 17
5
±0.15
±0.12
4
5
±0.15
±0.15
5
4
±0.12
5
±0.15
±0.15
5
4
±0.12
5
±0.15
5
±0.15
.01
AC
VARIABLE VOLTS/DIV
control
Advertisement
Table of Contents
