Tektronix 7704A User Manual

22 . A d j ust
H orizontal Am p lifier Centering
α . Set t he
cali b ration fixture Test switc h to Triggeri n g
Gai
n .
b . C HE CK -V ertical trace s h oul d alig n with t he vertical
ce n ter li ne of t he graticule with i n 0 .2 d ivision . Ch eck also
with t he H
O
R IZO N TA L M OD E switc h in t he C HO P
p ositio n .
ε . AD JU ST- H orizo n tal Centering ad j ustment R 4325
(see F ig . 6-34) to positio n t he trace to t h e vertical center
line . If n ecessary, a dj ust for b est compromise i n t he Α and
CH O P positions of t he H O R IZO N TA L M OD E switc h .
d . INT ER ACTIO N -If R 4325
is a
dj
uste
d ,
c
h
ec k ste p
21 .
23 . A d j ust H orizontal Am p lifier T h ermal B alance
α . Install α time-base un it in t he
Β H O
R IZ
compart-
me n t .
t h e VER TICA L M OD E switc h to LEF T .
ε . Set t he Β time-base unit for α free-running, magnifie d
sweep at α rate of 50 millisecon d s/ d ivisio n .
d . C HE C K -C RT d is p lay for not more t han 0 .1- d ivision
movement of t he d ot . If t h is instrume n t contains α readout
system, set t h e RE ADO UT i n te n sity control for visi b le
c h
aracters ; ch ec k
t
h at t h e d is p laye d ch aracters do not move
more t h an 0 .1
d ivision .
e . AD JU ST-T h ermal B alance a dj ustme n t R 4346 (see
F ig . 6-34) for minimum moveme n t of t h e d ot or rea d out
c h aracters .
f . I N T ER ACTIO N -If t he setting of R 4346 is c
h anged,
c
h
ec
k
steps
21
a
nd 22 .
Ν / 24 . C h ec k L ow- F re q uency L inearity
α . Set t he H O R IZO N TA L M OD E switc h to Α an d t h e
VER TICA L M OD
E
switc
h
to R IG HT .
b .
Set t
he calibration fixture Test switc h to V ert or
H oriz
+
Ste
p
R
es p .
b . Set t he H O R IZO N TA L M OD E switc h to CH O P and
Calibration-7704A Service
ε .
Set the cali b ration fixture Amplitu d e control for
two
divisions of d eflection in t h e h orizontal center of t he
graticule area .
-s /d . C HE CK -H orizontally position t he two-d ivision dis-
play a n d ch ec k for not
more
t han 0 .1 d ivision of
compressio n or expan sio
n
an yw
h
ere wit
h
i n t
h
e graticule
area .
\/25 . A d j ust H ig h - F re q uency Timing
α . I n stall an am p lifier unit in t he LEF T VER T com p art-
me n t .
b . Set t h e H O R IZO N TA L M OD E switc h to Β an d t he
VER TICA L M OD E switc h to LEF T .
ε . Set t he time- b ase unit for auto, internal triggeri n g at α
on e-milliseco nd / d ivision swee p rate .
d . Co nn ect one-millisecond mar k ers from t
h
e time-mar k
generator to t he am p lifier-unit i
n
put .
e . P osition t h e first mar k er to t h e fart h est left line of
t h e graticule .
f . Set t h e time- b ase unit sweep -calibration adjustmen t
for one mar k er at each ma j or
graticule d ivision, between
t he seco nd and tent h lines (center eig h t d ivisions) .
-
/9
. C HE C K- R
efer
to t
h e time- b ase unit i n structio n
manual for
performance
c
h
ec
k or calibration p roce d ures for
ch ec k ing h ig h
-fre
qu ency timi
n
g
an d linearity .
U
se t h e
p rocedures and limits
given for t he t h ree fastest sweep rates
w h
ic
h do not exceed two nanoseconds/ d ivision . If t h e give n
limits are met, omit t he remain d er of t h is ste p .
h . Set t h e VER TICA L M OD E switc h to R IG H T and t h e
H
O
R IZO N TA L M OD E switc h to Α .
i . Set t he R IG HT VER T time-base unit for auto,
external triggeri ng at α magnifie d swee p rate of 0 .5
microsecond/division (use basic swee p rate of five micro-
secon d s/divisio n , magnified ten times with Χ 10 magnifier
or d elayed
sweep to 0 .5 microsecond
/
d ivision)
.
j . Connect t he cali b ration-fixture Trig O u t connector to
t he exter n al trigger input of t he R IG H T VER T time-base
u n it .
4- 1 7

Tektronix 7704A Specifications

General

Brand	Tektronix
Model	7704A
Category	Test Equipment
Language	English