Tektronix 576 - Page 124

F ig . 5-10 . T ype 576 dis p
lay
o
f
Collector
Sup pl y p ea k s for ad ju sting
DELA Y ad j u st m ent Α
24 : (
Α )
incorrect ad ju stment ; ( Β ) correct
ad j ustment .
d .
Set t h e following Type 576 controls to :
POLARITY
NUMBER O F ST EP S
R AT
E
+(
ΝΡΝ )
3
2 Χ
e . T ur n t h e Ty pe 576 C EN T ERL I NE
VAL UE switch
clock wise until
t he p eak s of t he Collector Su pp ly out put
are d is p laye don t
h e
C R T (see
F ig .
5-1
OA) .
f . C HE C K F O R -Ste p occurring
exactly
at
t he pea k of
t h
e Collecto r Su pp ly out p ut (see F ig . 5-10 Β ) .
g . AD JU ST- R 24, D EL AY ad j ustment, (see
F ig . 5-9) if
t h
e ste p s do not occur at t he peak of t he Collector Su p
ply
out p
ut .
22 . A d j ust Zero Ste p
L evel
α . Set t he following Type576
controls to :
C EN T ERL I NE VA LUE

0
H O RIZON TA L
V A R IA BLE CO LLE CTO R
S UPPL Y
A MPL IT UDE

.05 V
ST
EP F AM Ι L Y
.05 V B AS E
F ully Countercloc k wise
SI N G LE
b .
P
ress t
h e
Ty p
e 576 Z ER O buttonan d center t he sp ot
h orizontally on t
he graticule using t he h orizontal F I NE
P
OSITIO
N control .
m . AD JU ST- R 127, I NV E R T Z ER O a d ju stment, (see
F ig . 5-9) if t he s pot is not centere d .
23 . A d j ust Ste p Am p lifier
Gain
α . Set t h
e following Ty pe 576 controls to :
NUMBER O F ST
EP
S

10
A MPL IT U D E

1
V
ST EP F AM I L
Y

REP
P O L A RITY I NVER T

R elease
d
b . Set t he following Calibration F ixtu r e controls to :
F unction

Step Gen
Ste pGene r ato r

.05 μΑ
c . Set t he test oscillosco pe controls as s h own in t he ini-
tial setup w h ic h p rece d es t h e Step Generator sectio n of t h is
procedure .
d .
Connect α 93 Ω cable wit h BN C-connectors between
t h
e E xternal M onitor
on
t he Calib r ation F ixture an d t he
C h annel Α In p ut of t h e test oscillosco p e .
e . Trigger t he test oscillscope d is p lay an d center t he
zero
ste p
of
t he Step Generatorout put on t he center h ori-
zontal line of t he test oscillosco p e CRT graticule
.
f . Set t he test oscillosco p e V c R ange switc h to +11 .
g . C HE C
K F O R -Tent h step on t he cen ter h orizontal
line of t
he test oscillosco p e gratic u le ' - 4 d ivisions (±2%) .
5- 1 7
P e r forma nce C h eck /Cali b ration-Type 576
c . R elease t he Z ER O butto n .
;
ΙΑ
)
Ε
σιν
d . C HE C K F O R -S pot h orizontally
centere
d on
t h e
λ
PER
graticule
Ι
SEE
Η
Ο
Λ
'
500
τπγ
e . AD JU ST-8224, AMP B A L ad j
ustment, (see F ig .
MMMMEEMMON
Ζ
-
5-9) if t he spot is not
cente r e d .
momMEMNON
ΡΕΡ
MOMMEMOMME
Τ
2
f .
Set t
he Ty pe 576 A MPL IT U D E switc h to 2 V .
Ρ γ
MEMMENOMEN
g . C HE
C K F O R -S pot h orizontally centere d on t h e
MEMEMME
α
9m
gratic u le
EMEMENINSE EM
PER
DIV
h . AD JU ST- R
97,
ZERO ST
EP
a d ju stment, (see
F
ig .
5-9) if t h
e
d is p lay is not
cente
r
e
d .
;( Β
)
Ε
Λ
NONE SOMME
D ιν
i . R eset t
he
A
M PL IT U D E switc h to .05 V .
EMEMEMEMEM
PER
Η
ο
j . R
e p
eat p
arts b t h roug h i u ntil th e sp ot remains center-
ί
_
Λ
4
τπγ
e
d wh en t h
e
A MPL IT U D
E
switc
h
is switc
h
ed
between t he
. ι V
.05 V an d t he 2 V positions .
W IN N I
ΡΕ R
ς
ε
γ
k . Set
t he Ty p e 576 A MPL IT UD E switch to 2 V an d
Ρ
p ress t he
P
O
L A R ITY I NVER T button .
β
9m
Ι . C
HE
C K F O R -S pot cente r ed h orizontally on t h
e
grat-
PER
σιν
ic
u
le .