Tektronix 576 - Page 15

ST EP G EN O UT
Connector
ΕΧΤBAS E O R
EMITINPUT
Connector
GR
O
UN D
Connector
L ig h t
Caution
L ig h t
Controls
L
ine Voltage
Selector
Switch es
60 H z-50 H z
Switch
tions h i p w h ic h
banana plugs if some ot h er means of
connecting Device Un d e r Test to
Stan d ar d Test Fixture is d esire d . C, Β
an d Ε stan d for collector, base and
emitter, res p ectively . Unlabele d termi-
nals allow K elvin sensi n g of voltage for
h ig h current devices .
Ste
p
Ge n erator
output signal a pp ears
at t
h
is connecto
r .
Allows in p ut
of externally generate d
sig n al to eit h
er
base
terminal or emit-
ter terminal of
Device Under Test as
determine d by
Terminal Selector
Switc h .
P rovi d es external access to groun d ref-
erence .
R ed lig h t on, in d icates Collector Su p -
p ly is enable d an d d angerous voltage
may app ear at collector terminals .
R ear Panel
Switch assembly
selects
op-
erating voltage an d line voltage
range .
Also inclu d es line fuses .
Voltage Selector-Selects op
e
r ating
voltage (115 V or 230 V) .
R ange Selector-Selects line voltage
range
(low,
me d ium, hig h ) .
Allows conve
r sion of i n st r ument
for
op
eration wit h eit h er 60 Hz
or 50 Η 7 line fre q uency .
FR ON T P A NEL CO L O RS
T h e various colors on t he front- p anel of t he Ty pe 576
and Stan d ar d Test Fixture in d icate relations h i ps between
controls and control functions . Table 2-2 s h ows
in d icates . eac h color
Table 2-2
Colors an d Controls
t he rela-
Yellow
Blac k ( B uttons)
Dark Grey
( B uttons)
O pe r ati n g Instructio n s--Ty p e 576
I nd icates controls and statements as-
sociated with t he voltage mo de of op-
eration of t heStep Generator .
In d icates function controlle d by α
si n gle button, w h ic h is release d for
most common app lications .
In d icates function controlle d by seve r -
αΙ buttons, an d t h e d ar k grey button is
p resse d for most common a pp lica-
tions .
PRE
CA U TIO N S
Α number of t
h e
Ty p
e
576 front- p
anel
controls coul d ,
t
h
roug h im
p
ro p
er use, cause
damage to
t h e device
und
er
test . Fig . 2-4 indicates t he a r ea of t h e Ty pe 576 front panel
w h ere t h ese con trols are locate d . Care s h oul d be exercise d
w
h en
using
controls locate d in t h is area .
Fig . 2-4 . Co n trols locate d in lig h t area
of Type
576
fr
on t- p a n el
co u ld cause damage to α device und
e r test if use d im pr
op e
r ly .
G
ENER A L D E SC R I P TIO N O F IN ST RU M EN T
O PER ATIO N
Th e Ty p e 576 is α semicon d uctor tester w h ic h d is p lays
an d allows measurement of both static and d ynamic semi-
cond uctor ch aracteristics obtaine d und er simulate d o p era-
ting con d itions . T he Collector Sup ply an d t he Ste p Genera-
tor p ro d u ces voltages and currents w h ic h are a pp lie d to t he
d evice un d er test . T he d is p lay am p lifiers measure the
effects of t h ese app lie d con d itions on t he d evice und er test .
2- 7
Color R elatio n s h i p
Gree n In d icates
controls
w
h
ic
h affect t h e
Step Generator p olarity .
Bl ue In d icates controls and
statements as-
sociate d with d is p lay
offset .
Orange In d icates relations h i p of LE A K AG E
(EM ITT ER C URREN T) mo de with
t he VER TICA L an d HO R IZO N TA L
switc h es .