Tektronix 576 - Page 18

O p erating Instructio n s-Ty pe 576
EMENES
EMENNE
EMMMENNONN
NOMMEEMENE
NERNERNMON
NOWNSENNEW
MMMOMMEOMM
MEMERNMENN
1/1 " R ""ΝΕ SΗ"
S=/ WEE M
ENE
1 . V /D i v
mA/D iv
V e r tical
H o r izo n tal
R
τ
DIV
PER
ο
R
Ι
οιν
PER
β
mA
τ
50
Ε
Ρ
» Α
ρΕ R ~0 ii
DIV
Fig . 2-6 . Di s pl ay o f Ι vs . V f or α Ι k Ω resisto
r
u
sing vario us settings
o f t he V ERTI CA L and H O RIZ O NT A L switc h es .
013-0072-00) into
th e right- h an d set of
accessory connec-
to rs locate d on t
he
Stan
d ar d Test F ixture
.
15 . Install α 1 k Ω , 1/2
watt
resistor
in t he d io de adap-
ter .
16 . Set t he LEF T-O FF-R IG
H T switc h to R
IG H T an
d
turn t he V A R IA BLE CO LLE CTO R
S UPPL Y control u ntil
α trace a pp ears d iago n ally across t
h e CR T .
17 . Turn t he VER TICA L switc h cloc kwise and note
th at as t he vertical d eflection factor
decreases t h e slo p e of
the line d ecreases (see
F
ig . 2-6) . Turn
t h e VER TICA L
switc h countercloc k wise from t h
e
1 mA p osition and
note
th at t he slo pe increases . Also note t h at t
he PER VER T
DI
V
rea d out ch anges in accordance with t h
e p
osition of t h e
VER TICA L switc h . R eset t he VER TICA L switc h to 1 mA .
18 . R ep eat ste p 17 u sing t h
e
H O R
IZO N TA L switc h
with in t he CO LLE CTO R range of t he switc h . T he change in
slo p e of t he trace will be t he inverse of w h at it was fo r t h
e
VER TICA L switc h . R eset t he H O R IZO N TA L switc h to 1
V CO LLE CTO R .
19 . P ress the Z ER O button . N ote t h at t he d iagonal
trace re d uces to α s p ot in t he lower left corne r of t he CRT
graticule . T h is sp ot d enotes t he p oint of zero d eflection of
the vertical an d
h
orizontal am
p lifiers . R elease
t
h e ZERO
bu tton
.
20 .
P ress the CA L button . Note t h at t he d iagonal trace
re d uces to α s p ot in t h e u pp er rig h t corner of t he CRT
gratic
u le . T he p osition of th is s p ot in d icates 10 divisions of
d eflection bot h vertically and h orizontally . R elease t he
CA L
button .
21 . P ress t he DIS PL AY INVERT button and tu r n t h
e
V A R IA BLE COL LE CTO RS UPPL Y control counte r cloc k -
wise . Note t h at t h e d isplay h as been inverted an d is now
originating from t he u pp e r rig h t corner
of t he CRT grati-
cule . R elease t he DIS PL AY I
NVER T button .
2- 1 0
Fi g . 2-7 . T yp e 576 Standard T est F ixtu r e wit h pr otective box in-
stalled f o r sa fe operation .
Collector Su pp ly
22 . Turn t
he MAX PEAK V O L TS switc h t h roug hout its
range . Note t h
at w h en t he switc h is in t he 75, 350 and
1500 p ositions,
t he yellow lig h t co ι r ι es on .
23 . Wh ile t h e yellow lig h t is on, turn t he V A R IA
BLE
CO LLE CTO RS UPPL Y cont r ol fully cloc k wise . Note t
h
at
t he d iagonal line obtaine d in ste p 16 does not a pp ear . Wh
en
t he yellow lig h t is on, t he Collector S u pp ly is d isable d .
24 . Set t h e following Ty pe 576 controls :
ΜΑΧ PEAK V O L TS

75
V A R IA BLE CO LLE CTO R

F ully countercloc k wise
S UPPL Y
LEF T-O FF-R IG H T O FF
25 . Install t he p
rotective
box on
t he Stan d ar d Test F ix-
ture as sh own in F ig .
2-7
.
26 . Close t
h e li d of the p r otective box an d
set t h e
LEF T-O FF-R IG
HT switc h to R IG H T . N ote t h at t h e yellow
lig h t turns
off
an
d t h e re d lig h t t u rns on .
W A RN I N G
T he red
lig h t in d icates th at d an gerous voltages
may
a p pear at t h
e collector terminals of t heStan d ard Test
F ixture .
27 . Turn
t he V A R IA BLE CO LLE CTO RS
UPPL Y con-
trol cloc
k wise . Note t h at t he diagonal trace appears
in d ica-
ting t h at t he Collector Su pp ly h as
been enable d .