Tektronix 576 - Page 17

DIS PL AY O FF S E T

N
O RM (O FF )

C R T and R ea doutControls
Selecto r
C EN T ERL I NE VA LUE

0
H O R IZO N TA L 1 V CO LLE CTO R
V ertical
P
OSITIO N Centere d
V ertical F
I NE
P
OSITIO N Centered
H orizontal P OSITIO
N
Ce n tered
H o r izontal

Centere d
F I NE P
OSITIO N
ZERO

R elease d
CA L

R elease d
DIS PL AY I NVER T

R elease d
ΜΑΧ PEAK V O L TS

15
PEAK P O WER W ATTS

0 .1
V A R IA BLE CO LLE C-

F ully Co u ntercloc k wise
TO R S UPPL
Y
POLARITY AC
M OD
E
N O R M
L OO P I NG

As is
CO MPEN SATIO
N
NUMBER O F ST EP S

1
C URREN T L I M IT

20 mA
A MPL IT U D E

0 .5 μΑ
O FF SE T Z
ER O
ST EP S

Pr esse d
PUL SE D ST EP S

R eleased
ST
EP F
AM I
L Y
REP ON
R AT E
N O R M
P O L A R ITY I NVER T

R elease d
ST EP MUL T .1 Χ

R elease
d
Terminal Selector

B AS E T ER M
STEP G EN
LEF T-O FF-R IG H T
O FF
4 . Turn t he GR ATIC U LE Ι LLUM
control
t
h roug hout its
range . N ote t h at t he gratic u le lines become ill u
minated as
t he co n trol is tur ned cloc k wise . Set
t
he control
for d esire d
ill u mination .
5 . Tu r n t h e RE ADO UT Ι LLUM con trol t h roug hou t its
range . N ote t h at t h e fiber-optic rea d outs and t h e rea d out
titles become illuminate d as t h e control is turne d cloc k wise .
Set t h e control for t h e d esire d readout illumination . T he
rea dout s h oul d rea d fo r t h ese initial control settings ; 1 mA
per vertical d ivisio n , 1 V per h orizontal d ivision, 50 ηΑ p er
ste p an d 20 k β or gm p er d ivision .
6 . Tu rn t he I NT EN
SITY control cloc k wise until α sp ot
a pp ears at t he cente r of t he C R T g
r aticule . To avoi d burn-
ing t he CRT ph os p h or, a d ju st t h e I N T EN
SITY control until
t he s p ot is easily visible, but n ot overly
brig
h
t .
7 . T ur n t he F OC US con
t r ol t h roug h o u t its range . A d -
ju
st t he F
OC U
S control for α s
h ar p ,
well-defined s p ot .
P
ositioning Controls
Operating Inst ru ctions-Ty pe 576
8 . Turn t h e ve r tical F I NE P
OSITIO N control t h roug h -
out its range . N ote t h at t he cont r ol h
as α ra n ge of at least
- 1 - 2 .5 d ivisions abo u t t he center h orizontal li
n
e .
Set t he con -
trol so t h at t he s p ot is centered vertically
on t h e C R T g r ati-
cule .
9 . R ep eat ste p 8 u sing t h e h orizontal F I NE P
OSITIO N
control .
10 . Turn t he vertical coa r se P
OSITIO N switc h . N ote
t h at t h e s p ot moves 5 d ivisio n
s vertically each time t he
switc h is move d one p osition . (T h e
extreme
p
ositions of t he
switc h re p resent
10 d ivisions of d eflection, w h ic h in t h is
case
causes t h
e
s p ot to be off t he CRT graticule .) Set t he
P OSITIO N switc h to t he cente r p ositio n .
10 . Turn t he vertical coarse P OSITIO
N switc h . Note
t h at t he s p ot moves 5 d ivisions vertically eac h time
t
he
switc h
is
moved one p
osition
.
(T
he
most ext
r
eme p ositio n s
of
t he
switc h re
p
resent 10 d ivisions of d eflection, w h ic h in
t h is case causes the s p
ot to be
off
t h e CR T graticule .) Set
t he P
OSITIO
N switc h
to
t h e center p
osition .
11 . R ep eat ste p 10 using t he h
orizontal coarse POSI-
TION
switc h .
12 . Set t he P O L A R ITY
switc
h
to -(
ΡΝΡ ) .
N ote t h at
t he s p ot moves to t he upper rig h t corner of t he CR T
grati-
cule .
13 . Set t h e
P
O L A R ITY switc h to +( ΝΡΝ ) . N ote t h at
t h
e
spot moves to t he lower left co r ner of t he CR T g r ati-
cule .
V ertical an d H orizontal
Sensitivity
14 . Install t he d io de
a
d
ap
te r (Te k t
r
onix P
art
Νο .
2-
9