Tektronix 576 - Collector Supply and Interlock Checks

P erfo r ma n ce C h ec k /Cali b ratio n
-Ty p e 576
5- 22
32 . C h ec k Collector Supp ly P olarity an d R i pp le
α .
Turn t he Ty pe 576 VA R IA BLE CO LLE CTO R S UP-
PL Y fully cloc k wise an d trigger t
he test oscillosco p e d is-
p lay .
b . C HE C
K F
O R -Dis
p
lay
of Ty pe 576 Collector S u pp ly
outp ut i n AC
p olarity (sine wave) .
c
.
Set t he
Ty p
e 576 P
O
L A R ITY switc h to +( ΝΡΝ ) .
TA BLE 5-7
C h ec k Collector Supp ly R i pp le
'
Calibration F ixtu r e 10 Χ atten u ato r ca u ses ri pp le to
be doub l ed i n t h is case .
c . P osition t he sp ot to t he zero vertical line an d t h e
center h orizontal line of t he Ty pe 576 C R T gratic u le .
d . Set t he Ty pe 576 H O R IZO N TA L an d MAX PEAK
VO L TS switc h es as s
h own
in
Table 5-8 .
e . Fo r each grou p of
settings, turn t he Ty pe 576 V A R -
IA BLE CO LLE CTO R S UPPL
Y control f u lly cloc k wise an d
ch ec k fo r α p ea k voltage as s h ow n in Table 5-8
.
ΜΑΧ PEAK
VO L TS In put Atten m
V /cm R i pp le
(pea k -to- p ea k )
Tole r a n ce
15 1 10 ±1 .5 d iv
15 V
±1°/ ο
75 1 50 ±1 .5 div 75V
±1°/ ο
350 10 20 ±1
.75 d iv 350 V ±1°/ ο
1500 100 10
±3 .0 d iv' 1500 V ±1%
CO LLE CTO R S UPPL Y
d . C HE CK F O R -Dis p lay of Collector Su p ply outp ut in
Initial
Control Settings
+( ΝΡΝ ) p olarity (full wave r ectifie d positive-going
sine
wave) .
Ty p
e 576
VER
TICA L 20 mA
e . Set t he Ty pe 576 P O L A R ITY switc h to -(
ΡΝΡ ) .
DIS
PL
AY O
FF S E T Selector N O RM (O FF )
C EN T ERL I NE
V
A LUE
0
f . C HE CK F O R -Dis p lay of
Collector Sup p ly outp ut in
H O R IZO N TA L
2 V CO LLE CTO R
-( ΡΝΡ ) p olarity (full wave
rectified negative-going sine
P OSITIO N (
V e r tical an d Controls Centered
wave) .
H o
r izontal)
F I NE P OSITIO N ( V ertical Controls Centere
d g . Set t he following Ty p
e
576 controls to :
and H orizo n tal)
P O L A R ITY
+(
ΝΡΝ )
MAX
PEAK V O L TS 15
M OD E DC
PEAK
P O WER W ATTS 220
VA R IA BLE CO LLE CTO R F ully Cloc k wise
VA R IA BLE CO LLE CTO R F ully Counterclock
wise
S UPPL Y
S
UPPL Y
PEAK
P
O
WER W ATTS 220
h . Set t he Ty p e 576 MAX PEAK VO L TS
switc h and t he
V A R IA
BLE CO LLE CTO R F ully Countercloc k wise
test oscillosco pe I nput Attenuation switc h and M illivolts/
S UPPL
Y
Cm switc h as sh own in Table 5-7 .
P O L A R ITY AC
M OD E N O RM
i . F or eac h g r oup of settings s
h
own in
Table
5-7,
trigger
STEP F AM I L Y
REP
t he test oscillosco p
e
d isplay and p
osition t he dis p lay of
ri pp le onto t h e CR T .
Ty pe 576 Calib
r ation F ixture
F
unction
Step Gen j . C HE CK F O R -Dis p lay of DC mo de ri p ple wit
h
in tol-
Ste
p Generator L oa d s Colt V oltage= 10 Into e r ances sh own in Table 5-7 .
1 ΜΩ
Test Oscilloscope
33 . C h ec
k Collector Su pp ly Pea k V oltages an d
C
u rrents
Time/Cm 5 ms (Calibrate d )
Triggering Trig,
+,
AC, Ι nt
α . Set t
h e Calibratio n F ixt u re Ste p Gene r ato r L
oa
d s
V c R ange 0
switc h to Off .
In p ut Cou p
ling AC
In pu t Attenuation
100
b . Set t
he
Ty p
e
576
V
A R IA
BLE
CO LLE CTO R S
UP-
M illivolts/Cm
10
PL
Y
fully
countercloc k wise
and
t he M
OD
E
switc
h
to
N O RM .