Tektronix 2213 - Page 66

AD JU
ST
MEN T PR
OC
E D
URE
I N TR OD U CTIO N
I MP
O
R TA N T- PLE AS E RE AD
BEF
O
RE
PURPOSE
T
h
e "A
dj ustme nt Pr ocedu re" is use d to
ret u rn
t
h e
instrument to
confo r mance with its "P erformance R eq
u ire-
ments" as
liste d in the
"S p
ecification" (Section 1) . T
h ese
ad ju
stments s hould b e pe r forme d only afte
r
t
h e ch ec k s i n
t he "Performance C
h ec k P roce d ure" (Section 4)
h ave
i nd icate d α
n ee d fo r ad j ustme n t of t he instrument .
T EST E QUIPMENT
REQUIRED
T he test
equi p ment liste d in Ta b le 4-1 is α complete
list of t
h
e
e qu i p ment r e qu ire d to accom p lis h b ot
h t h e
"A dj
ustment P roce d ure" i n t h is section an
d t he "P er-
fo r mance C h ec k P rocedure"
in Section 4 . Test equ i p ment
specifications d esc
r
ibe d
in Ta b le 4-1 are t he minim u m
n ecessary to p
rovi de
accurate
res u lts . T h erefore, e qu ipme
n
t
used m u st
meet
o
r
exceed
t h e listed s p ecifications . Detaile d
operating
instr u ctio n s for test e qu ipment are not
give n i n
t h
is
p roce du re . If more operating
info
r
mation is r eq uire d ,
refer to t h e a pp ro pr iate test e q u ipme
n
t
instruction manual .
Wh en eq ui p me n t ot
h
e
r t h an th at recommen de d is u se d ,
co n t r ol settings of
t h e test set u p may need to b e alte r
e d .
If t he exact
item of eq ui p ment given as an exam p
le in
Ta b le 4-1 is not
availa b le, first ch ec k t h e " P ur p ose" column
to verify use of t
h is item . T hen use the " M inim u m Spec-
ification" col
u m n
to
determine if any ot h er available test
e qu ipment mig h t suffice .
L IMITS AND
TOLERANCES
T
he limits an d tole r ances stated
in t h is proce du re are
instrument
specifications only if t
h
ey
are listed i n t he
" P erformance R e q uirements" colum
n of t he
"Sp
ecifi-
cation"
(Section 1) . Tole r ances give
n are
app
lica b le only to
t
h
e
instr u ment und ergoing a dj ustment and
do not inclu de
test
equi p ment error . A dj ust m ent
of t he instr u ment must
Section 5-2213 Se r vice
U SI N GT H IS
PR
OC
E D URE
be accom p lis he d at an am b
ient temperatu re b etween
+20 ° C and +30 ° C, and t h
e
instrume
n t m u st h ave h ad α
warm-up p erio d of at
least
20
min u tes .
P ARTIAL PROCEDURES
T h is p r ocedu re is structure d
in subsectio n s to p ermit
ad
j ustment of in d ivi du al sectio
n
s
of t he i n str u me n t (except
t he P ower S upp ly) w
h enever α com p lete r ea dju stment is
n ot r equ ired . F or exam p le, if only
t he V ertical section fails
to meet t he P erfo r ma n ce R e q uirements
(o r h as h a d r epairs
ma d e or compo n ents re p lace
d ), it can b e rea dj usted with
little or no effect on
ot h e r sections of t h e i n st r u m ent .
H owever, if t
h e P owe r
S
up ply sectio n h as u nd e r gone
r ep airs or a
dj ustments th at ch ange t he a b sol u te value of any
of t
he
su pp
ly voltages, α com p lete read ju stment of
t he
i n st r ume
n t may be r equired .
At t
h
e b
eginning of each s u bsectio n is α list of all t h
e
front- p anel
control settings re q ui r ed to p repare t he instru-
ment
for p erforming Step 1 in t h at s ub sectio
n . E ac h
succee d i ng step with in α s ub section
s h o u l d t h en b e pe r -
fo r me d b oth in the se q
uence p r esente d an d in its e n tirety
to e n sure t
h
at
control settings will be co r rect for ens u ing
ste p s .
ADJUST
M ENT INTERACTION
T h e use
of Table 5-1 is p articularly imp ortant
if α p artial
p roce du r e is p
erforme d or if α circuit req u ires
rea d j ustment
due to α com
p o nen t re p lace m en t . To u se t
h
is ta
b le, first
fi nd t he a d j
ustment th at was ma de (extreme
left col u mn) .
T he n move to
t he rig h t, across t h e r ow, until
you come to
α d ar kened s q
uare . F rom t he d ar kened square,
move
up
t h e table to find t
h e affected a dj ustment at t h e h ea d
ing of
t h at column . C
h
ec
k t he accuracy of t h is ad ju stme
n
t and,
if
necessary,
perform rea d j ustment .