Tektronix 2235 - ADJUSTMENT PROCEDURE; INTRODUCTION; PURPOSE; STRUCTURE

AD JU ST
MEN
T PR OC
ED URE
I N T R OD U
CTIO N
PURP OS E
T he "Ad j ustment
P rocedure" is α set
of logically se-
q
uenced instructions inten
ded to return t
h
e
i nstrumen t to
conformance
wit h t
h
e
P erformance
R eq uirement state-
ments
listed in Table
1-1 . Ad j ustments
contained in t h is p ro-
cedure
sh ould only be
performed
after chec k s from t
h e
" P erformance C hec
k P rocedure" (Section
4) h ave in d icated
α
n eed for read j
ustment or after re p airs
h ave b een made to
t he
instrument .
ST RUCT URE

L I M ITS A N
DTO LER ANC
ES
T h is p roce d ure is structured
into four ma j
or sub sections,
eac
h
of
w h ic h can b e
performed in d
ependently to p
ermit
a dj
ustment of individual
sections of t he
instrument . F or
ex-
ample,
if only t he V
ertical section fails
to meet t he P erfor-
mance R eq u irements
or h as h ad
repairs made, it can b e
rea
dj usted wit h little
or no effect on ot
h
er
sectio ns of t h e
i n
strument .
T
h
e
P ower Supp ly
section, h oweve
r , affects
all
ot h er
sections
of t he instrume
n t . T h erefore,
if repairs or readju st-
ments h ave b een ma
de t h at ch ange t he
absolute val ue of
any of t he supp ly voltages,
t h ee n tire A dj
ustment P rocedure
sh ould
be performed .
At t he beginning
of each subsection
is α list of all t he
front-panel control
settings re q uired to p
re p are t he instru-
ment for p erforming
Step 1 in t h at sub
section . Each suc-
ceeding
ste p wit h
i n
α
sub section s
h
o
u ld be performed
in
seque
nce and in its
entirety to ens u re
t h at con trol setti
n
gs
will be
correct for ensuing
steps . All ste p
s wit h i n α sub sec-
tion
s h o u ld be completed
.
TE ST E Q U
I PMEN T
Sectio n 5-2235
Service
Ta b le
4-1 . Wh en
considering use of e q uipment
ot h er t h an
t h at
recommende d , utilize
t h e " M inimum S p
ecification" col-
umn to
d etermine w h et
h
er
availa b le test
eq ui p ment will
suffice .
Detailed operati
n g instructions for test eq
uipment are not
given in t h is procedure .
If more operating
informatio n is re-
q uired,
refer to t he ap
propriate test-e q ui
p ment i n structio
n
ma n ual
.
T he
limits and tolerances
stated in t
h
is p
rocedure are
instrument
specifications
only if t hey are
listed in t he " P er-
formance
R e q uirements"
col u mn of Ta b le
1-1 . Tolera nces
given
are ap p licable only
to t h e instrume n t
undergoing ad-
ju
stment and do not include
test eq uipment
error . Ad j ust-
ment of
t he instrument must
b e accomplis
h
ed
at an am b ient
tem p
erature b etween
+20°C an d +30°C,
and t he i n stru-
ment
must h ave h ad α
warm-up p eriod
of at least 20
minutes
.
AD JU ST
MEN T I NT ER
ACTIO N
Some
ad ju stments i
n teract wit h and
affect ot h er a dj ust-
me
n t settings . Tab le 5-1
ide n tifies t h ese
i n teraction areas .
R efer
to t h is ta b le if α p
artial p r ocedu re is p
erformed o r if α
circ u it
re q uires read j
ustment due to α
component replace-
me
n t . To use Tab le 5-1,
first find t he ad j
ustment t h at was
made
(extreme left
column) . T hen move to
t he rig h t, across
t h e
row, until you come
to α dark ene d s qu
are . F rom t h e
dar
k ened s q uare, move up
t he col u mn to fin d t
h
e
interactive
ad j
ustment . C h eck t h e accuracy
and, if n ecessary,
read j ust
t he ad ju
stment .
T he test e q
uipment listed in Ta
b le 4-1 is α complete list of

PREP
A R ATIO N F O
R AD JU ST MEN
T
t h eeq ui p
ment re q uired to accom
p lis h b ot h t he " P e
r for-
mance C heck
P rocedu re" in section
4 and t he "Ad ju stment

T h e instrument
ca b inet m u st be
removed to perform
t h e
P rocedure"
in t h is section . To
assure accu rate meas
u re-

Ad j ustment
P rocedure . See
t he "Ca b inet" remove and
ce-
ments, it is
importa n t t h at test e q
ui p ment used for ma
k i ng

p lace
instructio ns located in t he "
M ainte nance" section
of
t h ese c h ecks
meet or exceed t he sp
ecifications describe
d in

t he manual
.