Tektronix 576 - Page 127

P erforma n ce Ch ec k /Cali br atio n -Ty pe 576
e . Set t h e Cali b ration F ixture Ste p Generator switc
h
to
2 mA .
f . C HE CK F O R -V oltage limit between 1 and 3 d
ivi-
sio n s below t he tent h ste p (1 to 3 volts) .
See
F ig . 5-11 Β .
α . Set t he Calibration F ixt ur e Ste p Generator L oa d s
switc h to 40 V Loa d .
b Set t he Ty pe 576 AM PL IT U D
E
switc h an d t
h e
test
oscilloscope M illivolts/Cm and In p ut Attenuation switc
h
es
as s h own in Table 5-5 .
TA BLE 5-5
C hec
k M
aximum
V oltage
i n
V
oltage
M
od
e
c .
F
or
eac h gro u p of settings sh own in Table 5-5, p ress
t he Ty p e 576 Z ER OO FF SET b u tton an d a d j ust t
he
test
oscillosco p e M illivolts/Cm V ariable for 2 d ivisio n s of
deflec-
tio n
on
t h e test oscillosco pe CRT . W it h 2 d ivisions of d e-
flection, p osition t he zero ste p one d ivision
below t he cen-
ter
h orizontal gratic u le line an d p ress t he AID O FF SE T
b
u tto n
d . C HE C K F O R -Dis p lay of t h e ste p family with t h e
tent h ste p offset to t h e to p ho r izontal gratic u le line of t h e
C R T .
5- 20
TA BLE 5-6
C h ec k S h ort Circuit C u rrent L imit
e . P ress t h e Ty pe 576 O
PP
OS
E
O
FF
S
E T
button
.
f . C HE C K F O R -Dis p lay of t he ste p family wit h t h e
zero step offset to t
he
bottom
h
orizontal graticule
line
of
t he CRT .
b . Set t
he following Calibration F ixture
controls to :
Step Gene r ator

100 mA
Step Generator
L
oa
d s

.1 Ω
c . P ress t he Ty p e 576 Z ER O bu tton and p osition t he
spot to the zero vertical and center h orizontal
gratic u
le
lines
of t h e Ty pe 576 . R elease t he Z ER O button .
d . Set t
he
Ty p
e 576 C URREN T L I M IT
an
d H
O
R IZO N -
TA L switc h
es
as
s h own in
Table 5-6
.
e .
C HE C
KF
O
R
-S p ot
dis p lace d
from zero
vertical grati-
cule line no more t h an t he maximum s h own i n Table 5-6
w h en t he Ty pe 576 A M PL IT U D E switc h is t u rned t h roug h
its voltage range . Wh en t he Ty pe 576 C URREN T L I M IT
switc h is set to 100 mA and 20 mA, set t he Calibration
F ixt u re Ste p Generator Load s switc h to Step Gen .
31 . C h ec k M iscellaneous Ste p Generator B uttons
α . Set t he following Ty pe 576 controls to :
A MPL IT UD
E

1 V
O FF S
E
T

Z ER O
R
AT E

.5 Χ
b
. Set t he following Calibration F ixture cont r ols to :
F unction

Ste p Ge n erato r C h ec k
Ste p Generator

1 V
t Set t he T ype576 DI S PL AY O FF S ET Selector switc h to NORM (O FF ) andp os
i
tion
z ero spot on z er o vertical gratic ul e line .
A MPL IT UD
E M illivolts/cm In p utAtten
2 V 10
1000
1
V 5 1000
.5 V 20 100
.2 V 10 100
.1 V 5 100
.05 V 20 10
C
URREN T
L
I M IT
H O R IZO N TA L
(B AS E)
Max
Dis p lacemen t from
Ze r o V ertical Graticule L i n e
Tolera n ce
2 Α .5
4 divisions +2 d ivisions 2 Α +50 ο / ο - Οο / ο
500 mA .1
5 d iv +2 .5 d iv 500 mA +50 ο / ο - Οο / ο
100
mA' .2
5 d iv +2 .5 d iv 100 mA+50°/ ο - Οο / ο
20 mA'
.05 Τ 4 d iv +2 div
f
20 mA +50 ο / ο - Οο / ο
g .
Set t h e Type 576 A MPL IT UDE switc h to 2 V .
30 . C h ec k S h ort Circuit Current L imiting in
h . Set t h e Calibration F ixtu r e Ste p Generator switc h to
10 mA .
V oltage M ode
α Set t h
e following
Ty
p e
576 controls to
:
i . C HE CK FOR--Current limit betwee n one and two
DIS PL AY O FF SE T Selector H O R IZ Χ 10
d ivisions below t he tent h ste p .
C EN T ERL I NE VA LUE 0 .5
O FF SE T AID
29 . C h ec k M aximum V oltage in
V
oltage
M
o de
VER TICA L 2 Α