Tektronix 576 - Initial Setup and Controls

2 . L oosen t
h e
two captive screws w hich hol d th e cover
onto t
he
voltage
selector
assembly, t
h
en pull to r emove t he
cover .
3 . To convert from 115-volt to 230-volt line voltage or
vice versa,
pull
out t he V oltage Selector switc h bar (see F ig .
2-1) ; turn it 180 ° and p l ug it back i n to t he remaining h oles .
C h ange t he line-cor d p ower plug to matc h t he power-source
rece p tacle or use α 115-to-230-volt a d a p ter .
4 .
To
ch ange
regulating r anges, pull out t he R ange Se-
lector switc h bar (see F
ig . 2-1) sli d
e
it to t he d esire d p osi-
tion and p lug it back in .
Select α range w h ic h is centere d
about t h e average line
voltage to w h ic h t h e instrument is to
be connecte d (see Table 2-1 ) .
5 . R e-install t h e cover and tig h ten t h e
two ca p tive
screws .
6 .
To
convert
from o p eration wit h 60 H z line fre q
uency
to op eration
wit h 50 H z line fre q uency (or vice
versa), sli de
t h e 60 H z-50 H z
switc h (see Fig . 2-1) to t he p
osition w h ic h
coinci d es with t h e line fre q
uency being use d .
7 . Before a p p lyi n g
power to t he i n strument, ch ec k t h at
t he in d icating
tabs on t h e switc h bars are p rotru d ing
t h roug h t he correct
holes in t he voltage selector assembly
cover for t h e desire
d li n e voltage and regulating range .
T h e Ty p e 576 s h oul d not b e o p erate
d wit h t he V olt-
age
Selector switc h or t he R an ge Selector switc h in
t he wrong position for t
he line voltage app lied .
Operation of t he instrument
with eit h er of t h ese
switc h es i n t h e wrong p osition
will cause incorrect
op eration and may damage t
h
e
instrument .
CO N T R O L S, CO NNE CTO RS A N D
RE ADO UT
All controls and
connectors r e q uire d for normal
o p era-
tion of t h e Ty p e
576 are locate d on t he front
an d rear
panels of t
h
e
i nstrument and on t he front panel
of t h e
stan d ard test
fixture (see F igs . 2-2 an d
2-3) . In a dd ition,
rea d out of
some of t h e instrument functio
n s h as been pro-
vi ded
on t h
e
front p anel . F amiliarity
wit h t he functio n an d
use of eac h of
t h ese controls, connectors
and t he rea dout is
necessary for
ef f ective op eration of t h e
instr u ment . T he
functions
are describe d in t he following
table .
Controls
CA
U
TIO
N
C R T and R ea d o u t
I N T EN SITY

Controls brig
h tness
of d is p lay .
Control
F OC U S
Control

play definition .
Provides a d j ustment for op timum d is-
RE ADO U T

Co n
trols brig
h
t n ess of rea dout .
Fi g . 2-3 . Rear-panel cont r o l s .
Ι LLUM
Control
SCA LE I LLUM

Controls graticule
illumination .
Control
Connector
CA MER A
PO WER
Connector
R ea d ou ts
PER VER T

Rea d out in d icates deflection
factor of
DI V R
ea
d
out

vertical d is p lay as viewe d on CR T .
PER
H O R IZ

R ea dout indicates d eflection factor of
DI
V
R eado
u t

h orizontal d is p
lay
as viewe
d on
C
R
T .
PER ST EP
R
ea
d
ou
t
β OR
gm
PER DI V
R ea dout
VER
TICA L
C URREN
T/DI
V
Switch
O p e r atin g I n
structions-Ty p e 576
Provi d es +15 volts
for op
eration
of
came r a .
R ea dout in d icates
am
p
litu d
e p
er ste
p
of
Ste
p Generator output
.
R ea d out in d icates beta or trans-
con d uctance per division of CRT dis-
play,
Dis p lay Se n sitivity a n d P ositioning
Selects vertical d eflection factor
of dis-
p lay .
COLLECTOR-Normal op eration
of i nstrument . V ertical d is p lay re p -
resents
collector cur r ent . U se blac k
units to d ete r mine
vertical deflec-
tion factor .
2-3