Tektronix 576 - Page 125

Performance C h eck /Calib r atio n -Ty p e 576
h . AD JU ST- R 113, ST EP AMP GAI N a dj ustme n
t, (see
F ig . 5-8) if t he te n t h ste p is not cente r ed .
i . P ress t he AID O FF S
E
T button
.
j . C HE CKFOR -Ze r o ste p with offset at same level as
t he tent h step wit hout offset ±4 d ivisio n s ( - ! - 2%) .
k . A D D U ST- R 86, AID O FF S E T a d ju stment, (see F ig .
5-9) if t h e level of the ze r o ste p with offset is not correct .
Ι . P ress t he Ty p e 576 Z ER O O FF SE T button .
m . Set t he test oscillosco p e V c Range switc h to 0 .
η . C h ec k t h at t he zero ste p is p ositione d on t he center
h orizontal graticule line .
ο . P ress t h e Ty pe 576 O PP OS E O FF SE T button .
ρ . C HE CK F OR -Tent h ste
p
with
o
pp osi
n g offset
at
t he
same level as t h e zero step wit hout offset - ! - 4 d
ivisions
(±2%) .
q . AD JU ST- R85, O PP OS E O FF SET a d ju stme n t, (see
Fig 5-9) if t he level of t h e tent h ste p with offset is n ot
cor r ect .
24
. A d j ust Current B alance
α

Set t he following Ty p e 576 controls to :
H O R IZO N TA L

.1 V B AS E
DIS PL AY O FF SE T Selector

H O R IZ Χ 1
C EN T ERL I NE VA LUE

5
AM PL IT UD E 50 μΑ
O FF SE T

Z
ER O
b . Set t h e following Calibration
F ixtu r e controls to :
Step Gene r ator

50 μΑ
Step Ge n erator Loads

1 Κ Collector S
h
o
rt
c . P ositio n t h
e
te n t
h
s p ot
to t h e intersection of t h e
tent h h orizontal and center
ve r tical graticule li n es .
d . Set t he DIS PL AY O FF
SET Selector switc h to
H O R IZ Χ 10 .
e . R ep osition t he s p ot to t he i n tersectio
n
of
t h e tent h
h orizontal and center ve r tical graticule line
.
f . Set the Calibratio n F ixture Ste p Gene r ator
L
oa
d s
switc h to 1 Κ
+
18 Κ .
5- 1 8
g . C HE CK F O R -S p ot cente r ed h orizontally .
h . AD JU ST- R 243, O UT PU T Ζ a d j ustment, (see F ig .
5-9) if t he s p ot is not cente r ed .
i . T ur n t he Step Generator L oa d s switc h back and fort h
between t he 1 Κ Collector S h ort and t he 1 Κ
+
18 Κ
p ositions and ch ec k for no movement of t he spot between
t he two p ositions .
j . Set t h
e
Ty p e 576 A MPL IT U D E switc h to 2 V .
k . Set t
he following
Calibration
F
ixt u re controls to :
Ste
p
Generator

2 V
Step Generator L oa d s

Ste p Gen
25 . C h ec k Ste p Generator Accuracy
α .
Set t he test oscillosco pe controls
to :
V c R ange

+11
Com p arison V oltage

0 .000
b . P
osition
t he ze r o ste p
to t
he
center h orizontal grati-
cule
line of t
h e
test oscillosco p
e .
c . Set t h e test oscillosco pe Com p ariso n V oltage to
1 .000 .
d . C HE CK F O R -Ste p on test oscillosco p
e
center h ori-
zon tal graticule line ±1 d ivision (±5% of 1 V) .
e . Turn t he test oscillosco pe Com p a r ison V oltage switc
h
t h roug h out its range .
f . C HE C K F O R-E ac h ste p on t h e test oscillosco p e grat-
icule at t he same level as t he p revious ste p ±1 d ivision
(±5% of 1 V), fo r eac h p osition of t he Com p ariso n V oltage
switc h .
g . Turn t he Ty pe 576 A MPL IT UD E switc h a nd t h e Cali-
bration F ixture Step Generator switc h , toget h er, t h ro ugh -
o u t t h eir ranges .
h . C HE CKF O R -Tent
h ste p
on
test oscillosco pe center
h o r izontal graticule li n
e
±4 d
ivisions (±2% ο of total outp ut) .
i .

F o r t he .1 V_5 μΑ , 1 mA an d
200
mA p
ositions, set
t
h e Test Oscillosco p e cont r ols as in p art α an d re p eat p arts b
t h ro u gh f .
j . P ress t h e Ty p
e
576 ST
EP MUL T .1 Χ button .
k . Set t h e following
test oscilloscope con trols to :
V c R ange

+1 .1
Com p arison V oltage

0 .000
M illivolts/Cm

10
Ι . P osition t he zero ste
p
to t
he center h orizontal grati-
c u le line of t he test oscillosco p
e
.
m . Set t h e test oscillosco pe Compa r ison
V
oltage switc
h
to 1 .000
η . C HE
CK F O R -Ste p
on
test oscillosco pe center h o r i-
zontal graticule line ±1
division (±10% ο
of
0 .1 volts) .
ο . Turn
t he test oscillosco p e Com p arison V oltage switc h
t h ro u g hout its range .
ρ . C HE CK F O R--E ac h ste p on t h e test oscillosco pe g r at-
icule at t he same level as t h e p r evious ste p ±1 divisio n
Ο