Tektronix 434, Instruction Manual, Page: 88 / 222

Calibration—434
7 SKT3QN0L ? V'
pM lHW |-__ All ftigh?s ftf'>
G e o m e tr y
B 1 2 9 2
SSeM
PwHIB B B6
L o w e r S to re |
L e ve l “
R 1 2 7 6 1
L o w e r N o n -
j
S to re L e v e l I
U p p e r S to re
Level
R 1 2 2 6
U p p e r N o n -
S to re Le vel
R 1 2 2 4
F ig . 5 -6 . L o c a tio n o f sto ra g e c ir c u it a d ju s tm e n ts a n d te s t p o in ts .
c. F u lly w rite the e n tire screen by v e rtic a lly p o s itio n in g
th e trace fro m one e xtre m e to th e o th e r.
d. Set th e LO W ER SC R EEN S TO R E b u tto n to the n o n ­
store (b u tto n o u t) p o s itio n .
e. C H E C K —T he stored d isp la y in the L o w e r Screen area
disappears very q u ic k ly and does n o t linger. A lso should
have m in im u m " s c a llo p in g " o f th e U pper Screen stored
d isp la y.
f. A D J U S T —Lo w e r Screen N on-S tore Level R 1274 fo r
best non-store d isp la y c o m p ro m ise as described in step e.
g. Set th e LO W ER SC R EEN S TO R E b u tto n to STO RE
(b u tto n in ).
h. F u lly w rite th e e n tire screen b y v e rtic a lly p o s itio n in g
th e trace fro m one e xtre m e to th e o th e r.
i. Set th e UPPER SC R EEN S TO R E b u tto n to th e n o n ­
store (b u tto n o u t) p o s itio n .
j. C H E C K —The stored disp la y in the U pper Screen area
disappears very q u ic k ly and does n o t lin g e r. A ls o should
have m in im u m "s c a llo p in g " o f th e L o w e r Screen stored
d is p la y .
k. A D J U S T —U pper Screen N o n-S tore Level R 1224 fo r
best non-store d isp la y c o m p ro m ise as described in step k.
10. A d ju s t U pper and Low er Store Levels
N O T E
Som e com prom ises in th e C R T d is p la y can be made
b y a d ju s tin g the S to re Level c o n tro ls . When the
o p e ra tin g level is increased, the b rig h tn e ss a n d w ritin g
speed increase; h o w e ver, th e c o n tra s t ra tio decreases.
When the o p e ra tin g level is decreased, the c o n tra s t
ra tio increases; h o w e ver, brightness a n d w ritin g speed
decreases.
a. Set b o th S TO R E b u tto n s to th e ir N on-store (b u tto n
o u t) p o s itio n s and ad ju st th e IN T E N S IT Y c o n tro l fo r
n o rm a l d isp la y brightness.
5-10