Tektronix 570, Manual

Page: 119 / 134

CALIBRATION
c. Phase B
Turn STEPS/SEC to 120 (cw) position. Adjust Phase
B for best flatness at display top.
Check 240 position for alternate switching.
13. GEOMETRY
a. Geom Adj 5/8 minor div
Adjust Geom Adj for min curvature of vertical bars:
5/8 minor div bow, max.
Increase PEAK VOLTS for more vertical amplitude,
if desired.
14. VERTICAL GAIN
a. Setup
VERTICAL
VERTICAL MA/DIV
INDICATION
HORIZONTAL
HORIZONTAL VOLTS/DIV
range dc volts
SCREEN
.1
+DC
GRID
I
140
Adjust VARIABLE +dc for 570 meter indication of
exactly 140v. Take into account meter error pre­
viously noted.
b. Vert Gain
Set INDICATION to HTR and position the spot to
bottom graticule line.
Set INDICATION to +DC and adjust Vert Gain for
deflection of 10 major div.
Move INDICATION back and forth between +DC and
HTR until all interaction has been compensated for.
TEK 570 FCP
2-5 -64
12c.
13a . NOTE
NOTES
Phase B
(1) These crt specifications are simplified.
Do
not reject crt without the authorization of a
trained crt checker, or without reference to
crt data.
570 CALIBRATION
15