Tektronix 576 - Page 115

P erfo r mance C h ec
k /Calibratio n -Ty p e 576
t .

R
ep eat p arts m an d η .
Fi g . 5-6 . DIS PL AY AMP
circuit board : L ocation o f ad j ustments in step 4 a nd steps
7
t
hr oug h 13 .
υ . P osition
t
h
e trace to t he center h orizontal
graticule
line .
ν . Turn t h e V A R IA BLE CO LLE
CTO R S UPPL Y control
an d t
he F
OC
U S control fully countercloc
k wise an d rec heck
a d ju stmen
t
of
astigmatism a nd focus as in p arts
b t h roug h d .
w . Setthe Type 576
VERTI CAL switch to .5 A .
5 . C h ec
k C R T Controls
α

Turn t
he
G
R ATIC ULE I LLUM control t h ro u g
hout its
range .
b . C
HE CK F O R -Continuous increase in graticule
illum-
ination
w hen t h e control is turne d from its
fully cou n ter
cloc k wise
p osition to its fully cloc k wise p osition .
5-8
c .
Set t he cont r ol so t h at t h e g r aticule
lines are visible .
d . Tu r n t h e INTENSITY con trol t hr oug hout its
r ange .
e . C HE
CK F O R -Continuo u s increase in t h
e
brig
h t n ess of
t he s p ot w he n t he control is
turne
d
from its fully counter-
cloc k wise p osition to its
f u lly cloc k wise p osition .
CA U TIO N
Wh en α single s pot is bei ng d isplaye d on
t he Ty pe 576
C R
T, set t he i n te n sity low en oug h to p reve
n t b urni ng
t he CR
T phosph or .
f . Set t he control for α visible s p ot
.
g . Turn t h e F OC U S control t h roug ho
u
t its
range .
h . C HE CK F O R -Spot in foc u s in t he center r
ange of t he
control .
i . Set t
he control for t he smallest p ossible s p ot .
6 . C h ec k R ea d
out
α . Turn t
he RE ADO UT I LLUM control t h roug hout
its
range .
b . C HE CK F OR -Continuous inc r
ease in t h e rea d out il-
luminatio n w hen t h
e
co
n trol is tu r ned from its fully counter-
cloc k wise p osition to its fully cloc k wise
p
ositio
n .
c . Set t h e cont r ol for
α visible rea dout .
d .
Turn t he Ty p e 576 VER TICA L switc h t hr o
ughout its
ra n ge .