Tektronix 323, Instruction Manual

Page: 99 / 170

Calibration— Type 3 2 3
e. ADJUST— Upper Defl Plate DC Level adjustment, R91
(see Fig. 6-5), to center the measured voltage range around
+ 5 0 volts.
f. Connect the precision DC voltmeter from the collector
of Q173 (case of Q173; see Fig. 6-5) to chassis ground.
g. Rotate the vertical POSITION control fully clockwise
and note the meter reading. Then rotate the vertical POSI­
TION control fully counterclockwise and again note the
meter reading.
h. CHECK— Voltage range measured in part g centered
around + 5 0 volts.
i. ADJUST— Lower Defl Plate DC Level adjustment, R93
(see Fig. 6-5) to center the measured voltage range around
+ 50 volts.
j. Position the trace to the center horizontal line with
the vertical POSITION control.
k. Connect the precision DC voltmeter from the collector
of Q163 (case of Q163; see Fig. 6-5) to chassis ground.
l
. Preadjust the Limit Centering adjustment, R66 (see Fig.
6-5), for a meter reading of + 5 0 volts (perform this adjust­
ment only if proceeding to next step).
m. Disconnect all test equipment.
Fig. 6 -6 . In itia l test equipm ent setup fo r steps 13 through 22.
Vertical Controls
Horizontal Controls
VOLTS/DIV .5
TIME/DIV 1 ms
VARIABLE CAL
VARIABLE CAL
INPUT DC
Horizontal POSITION Midrange
Vertical POSITION
Midrange
X 10 HORIZ MAG Pushed in
X 10 VERT GAIN
Pushed in
CRT Controls
Triggering Controls
FOCUS
Midrange
TRIGGER
+ AUTO
INTENSITY See procedure
Trig/Horiz Coupling
EXT TRIG OR
HORIZ ATTEN
(side panel)
INT TRIG AC
I X
Power Controls
POWER
Power Pack (rear panel)
ON
EXT DC
Tim e-mark
generator
C a lib ra tio n
shield
S tandard
am plitude
ca lib ra to r
I *
V > , |
« • »
™ • V7 6 ^
4 2 -inch
BNC cable
®
6 -1 0