Tektronix 7704A User Manual

Calibration-7704A Service
33 . A d j ust F ull C h aracter Scan
α . I n stall t
h e d ual-t r ace amplifier un it i n t he R IG HT
VER
T
com p artmen t .
b . Set t h e amplifier
unit for α d eflection factor of 50
millivolts/ d ivision .
ε . C HE C K -Dis p laye
d ch aracters for completeness wit h -
out oversca nn i n g
(overscanning causes α bright dot w h ere
traces overlap) .
d . AD JU ST- F ull C h aracter Scan a
dj ustme nt R 3437
(see Fig . 6-37) for
fully sca n ne d ch aracters wit h out
oversca n ning . T h
e m a nd the 5 will sh ow the most c h a n ge .
34 . A d j ust Column an
d R ow M atc h
α . Set the am p
lifier unit for α d ual-trace d isplay mo
d e .
b . P ress an
d h ol d t h e amplifier unit
trace-ide n tify
button s .
ε . C HE C K-
R ea d out d isplay for cor
r ect indicatio n of
"ID EN TI F
Y" . If t h e r ea d out d is p lay blin
k
s
or is i n correct,
ad j
ustme n t is re q uire d .
d . AD JU ST-Col u mn M atc
h
a
dju stment R 3407 and
R ow M atc h a dj ustment R 3422
(see F ig . 6-37) for correct
rea d out of "ID EN TI F Y" . Set
t h ese ad j ustments to t he
ce n te r of t he ad j ustme n t
range w h ic h p rovi d es correct
rea d out i n dication . R
elease t he am p lifier unit trace-identify
bu ttons .
-,/ 35
. C h ec k R ea d out M od es
ΝΟΤΕ
If the Signal B uffer sub-assembly is d eleted from the
instrumentbeing calibrated (Option 7), omit this
step
.
α . Install α time-base unit in the
Α H O R IZ com p artment .
b . Set the time-base unitfo r α free-run n ing swee p .
c . Set the R eadout M ode switc
h
to FR and t
h
e Gate
Selector switc h to Α (see
F
ig . 6-36) .
-/d . C HE CK -Set
t he time- b ase un it for several sweep
rates t h
roug
hout its ra n ge . C h ec k t h at t he rea dout c h ar-
acters
are p resente d on α free-run basis, in d epende n t of t h e
swee p rate .
e . Set t he R ea d out M o d e switc h to Gated (see F ig .
6-36)
.
f . Set t he time-base unit for α free-r unn ing sweep at α
rate of 0 .1 second/division .
-,/g
. C HE CK - R ea
d out
c
h aracters are blan ked out w h ile
t h e swee p is r u
nning, and are
displaye
d immediately after
t he e nd of t he sweep ; eac
h
c
h
aracter
enco d ed by t he p l u g-in
u n its is displaye d only once
for
eac
h sweep .
T
h
is
completes t h e Calibration procedure for t he 7704 Α .
Disconnect all test eq ui p me n t an d replace t h e si de p anels .

Tektronix 7704A Specifications

General

Brand	Tektronix
Model	7704A
Category	Test Equipment
Language	English