Tektronix 576 - CRT and Readout Calibration

P
erfo rm
ance C h ec k /Calib r atio n -Type 576
TA BLE 5-1
P
O
WER S UPPL Y V O L TAG E A ND RE G UL ATIO NC HE C K S
c . Set t he autot r ansformer fo r
t h e h ig h est voltage with i n
t h e voltage r a n ge selecte d by t h
e
L ine
V oltage Selector assem-
bly on t he rear p anel .
d . Co nn ect t
he 1 Χ test p r obe tip to t he test p oints of eac h
of t he p owe r
sup p lies give n in Table 5-1 .
e . C HE CK F O R -Test oscillosco pe d is p lay of
p ower
su p ply r i pp le with t he line fre q uency ri pp le p ea
k
to p ea
k
amplitude not excee d ing t h e maxim u m value given
in Table
5-1 . On t he +100-volt and t he +225-volt su
pp lies, set
t
h e test
oscillosco
pe Time/Cm to 50 μs an d ch ec k t he 20 kH
z
ri p
ple .
f . I n stall t h e Ty pe 576 Calibratio
n F ixtu r e, Tek tr onix
Pa rt Νο . 067-0599-00) and a d j ust
its co n trols as sh own in
t he list of initial cont r ol settings . Connect t
he camera pow-
er p lug on t he Calibratio n F ixture to t h
e
CA
MER A P O WER
connecto r on t he Ty pe 576 .
g . Set t he a u tot r an sfo r me r
for t he lowest voltage with in
t h e voltage ra n ge selecte d by
t h e L i ne V oltage Selecto r assem-
bly on t he r ea r p anel .
5- 6
h .

R epeat p a r ts d ande .
i . Disconnect
t he p
robe
f r om t he Ty pe 576 and t h e test
oscillosco p
e vertical in p ut .
4 . A d j ust CRT Controls
CRT A ND RE ADO U T
α . Turn t h e I N T EN SITY control cloc k wise until α large
s p ot is visible on t h e CRT .
b . C HE CK F O R -Spot with a circular shape .
c . AD JU ST- R891, ASTIG M ATIS M a d ju stme n t on t
he
r ig h t si d e of t h e i n st ru ment (see F ig . 5-4) if t he s p ot is not
circ u la r .
d . Turn t h e F OC U S con trol cloc k wise until t h e s p ot is t h e
smallest p ossible .
CA U TIO N
Wh e n α single s p ot is being dis p layed on t h e Ty pe 576
C R T, set t he intensity low e no u gh to p revent burn i n g
t h e CR T ph os ph or .
e . P osition t h
e s p
ot
to t he center of t he C R T graticule
usi ng t he F I NE
P OSITIO N controls .
f . Set t h
e V A R IA BLE CO LLE CTO R S UPPL
Y
co
n trol
for α trace
10 d ivisions lo n g,
g . C HE CK F O R -Trace p arallel wit
h t he h o r izontal
ce n terli n e (see F ig . 5-5) .
V oltage Accuracy
Total O u t p ut N oise
L ocation of
and L i ne F re quency
Test P oi n t
R i pp le, P ea k to
P
ea k
-75 5 mV P in Κ
-12 .5 ±0 .31 volts
5 mV Pin Ι
V a r iable ±0 .3
volts (at 20 mV
P
in
U
+4 .5
maximum setting)
+5 ±0 .25 volts
10 mV
P
in β
+12 .5 ±0
.31 volts 5 mV
P
in
F
+15 ±0
.75 volts 20 m V
P
in
Ζ
+100 ±2 .5
volts 20 mV of -28 kH z h ig h
P
in
Ε
voltage oscillator r i pp le
and line f r eq ue ncy r i pp le
+225 ±9 volts
80 mV or -28 kH z h ig h L eft arm of R 592
voltage oscillato r ri pp le VER TO U T PU T
an
d line fre q uency rip p le GAI N (see Fig . 5-3)