Tektronix 576 - Operating Specific Components

F I NE P OSITIO N
Cont r ol ( V e r tical)

dis p lay .
Controls
MAX
PEAK
V
O L TS
Switch
PEAK
P
O WER
W ATTS Switch
V
A R IA BLE CO L -
LE CTO R S UPPL Y
Cont r ol
P
O L A R ITY Switch
M OD E Switch
Pr ovides fine p ositioning of vertical
Collecto r
S
up p ly
Selects r ange of VA R IA BLE CO LLE C-
TO
RS UPPL Y co n t r ol . Switc h is loca-
te d b elow
PEAK
P O WER W ATTS
switc h an d ra n ge is i n d icated by w h ite
a rr ow . Wh en switc h is set to 75,
350
and 1500, p r otective box must be use d
with Sta nd ar d Test F ixt u res (see sec-
tio n on i n te r loc k system) .
Selects n omi n al p ea k p owe r out
p ut of
Collecto r
S
u pp ly,
by selecting r esist-
a
n ce
in series wit
h
Co l lecto r Su pply
outp ut .
PEAK
P
O WER W ATTS is
i nd icate d by
num b e r on tra nspa r ent
switc h flange a pp eari
n g
above w h ite
MAX PEAK VO L TS in d icator .
S ER I E S RE SISTO R S are i n dicate d by
b lac k i nd icato r . PEAK P O WER
W ATTS switc h must be pu lle d out to
set nominal p ea k p owe r outpu t . Wh en
PEAK P O WER W ATTS switc h is set,
se r ies r esistance is automatically
ch ange d to main tain d esi r
ed
nominal
p ea k power ou t p ut w hen
MAX PEAK
V O L TS switc h setti ng is ch ange
d .
Allows varying of collector supply
voltage with in r an ge set by MAX
PEAK VO L TS switc h .
Selects pola r ity of Collector Sup p ly
voltage
and
Ste p Ge ne r ator ou t p ut .
-( ΡΝΡ )-Collector S upp ly voltage
an d Step Generato r o u t p ut a r e
negative-going .
+(
ΝΡΝ )-Collector Su pp ly voltage
and Step Gene r ato r outpu t a r e
p ositive-going .
AC-Collector Su pp ly voltage is
both positive- and negative-going
(sine wave) ; Step Generator ou tput
is positive-going . Wh en switc h is set
to AC positio n , use .5 Χ step r ate
and no r mal mo de of op eration .
Selects mo d e of ope r atio n of Collecto r
Su pp ly .
N O RM - N ormal Collector S u pply
o u t p ut is obtaine d .
DC

(ANTI LOOP) -Collector
Sup-
ply out p ut is DC voltage e q u al to
pea k value set by V A R IA BLE CO L -
LE CTO RS UPPL Y cont r ol .
L OO P I NG
CO MPE NSATIO N
Co n t r ol
CO LLE CTO R
S UPPL Y
RE SET
Bu tton
L ig h ts
CO LLE CTO R
S UPPL Y V O L T-
AG E DISA BLE D
L ig h t
Co n t r ols
C URREN T
L I M IT Switc h
STEP /O FF SE T
A MPL IT U D E
Switc h
O
FF
S
E
T
Bu ttons
O pe rati ng
I
n
st ru ctions-Ty p e 576
LE A K AG
E (EM
ITT ER
C
UR-
REN T)- V
e
r tical sensitivity is in-
creased 1000 times . V ertical ampli-
fie
r measu r es emitter cu rrent . Col-
lecto r Su pp ly mode set for DC volt-
age ou t pu t .
Allows a d j ustme n t of looping compe n -
sation . Allows compe n satio n of inter-
nal a n d a da p ter st r ay capacitance .
Does not compe n sate for d evice
ca-
pacita n ce .
Resets Collector Su pp ly
if it h as been
d isable d by inte
r na l ci r cu it b r ea ke r .
Collecto r Su pp ly is
t u rned off w hen -
eve r maxim u m c urr en t r
ating of trans-
fo r mer
primary of 1 .2 Ampe r
es is ex-
cee d ed .
P
O WER ON-OFF Cont r
ols in p ut p ower
Switc h
P O W ER L ig h t

L ig h ts w h en p owe r is on
.
to i n st ru me n t .
In d icates Collector
Su pp
ly
voltage h as
been disable d . L ig h
ts w hen Collecto r
Su p ply may present
α pote n tially
dan gerous
voltage at its ou tput . In
such
α
case,
use of p r otective b ox is
re q ui r
ed to enable Collecto r Supply .
Also lig h
ts w hen h ig h c ur re n t gen -
e r ate
d by Collecto r Su p ply or Ste p
Gene
r ator causes inst r ume n t to ove r -
h eat .
Ste p Gene r ato r
Selects nu mber of steps p e r family of NUMBER O F
STEP S Switch Ste p Gene r ato r out p u t .
P rovides c u rrent limit of t he Ste p Gen-
e r ato r outp ut w hen voltage ste p s a r e
being p ro d uce d .
Selects am p lit ude p e r ste p of ste p s an
d
offset of Ste p Gene r ato r out p ut .
Am p litu d es wit h in blac k arc rep r esent
cu rr
ent
steps ; wit h in yellow arc, volt-
age ste p
s
.
N
ote cautio n
on front-
p
anel
w hen usi ng voltage steps .
Allows offsetting of Step Generato r
outp ut using O FF S ET M UL T con t r ol .
ZERO-No offset available
.
AID-Allows ze r o
ste
p
of
Step
Gen-
e r ato r o u t p ut to be o f fset as many
as 10 ste p s above its ze r o offset
level .
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