Tektronix 7704A User Manual

Calibration-7704A
Service
i . AD JU ST-C
RT Gri d B ias
a dju stment R
4135 (see F ig .
6-31) so t
he d ot on t h e C
R T scree n is j
ust exti n guis h e d .
j . L eave t h
e 10 Χ p ro b e co
n necte d to ΤΡ
41120 for t he
next step .
6 .
Ad j ust
Ζ -Axis Transient
R esponse
α . Set
t he test
oscillosco pe for α
vertical
deflection
factor of
one volt/ d ivisio
n (10 volts/
d ivisio n at pro
be ti p ) at
α sweep
rate of two
microsecond
s/division .
b .
Set t he time-
b ase unit
for α free-ru n ning
sweep at α
rate of
0 .02 microsecon
d /division
.
ε .
Set t he I N T
EN SITY
control for α p
ulse waveform
wit h α
peak -to- p ea
k amplitude
of 30 volts as
dis p laye d on
t he test
oscillosco p
e .
d . Set t he test
oscilloscope
for α swee
p rate of 20
n
anosecon d
s/divisio n .
e . C HE C
K -Test
oscillosco pe for
optimum s qu
are
corner on dis p
laye d pulse .
f . AD JU ST-
Ζ -Axis P ea k
ing ad j ustment R
4197 an d
C41109 (see
F ig . 6-31)
for optimum s q uare
cor n er on
d is p laye d
p ulse .
g .
Discon n ect all
test eq uipme n t .
V 7 .
A d j ust Trace
Alignment
α . Ch
ange t he following
control settings :
VER
TICA L M OD
E

A L
T
H O R IZO N TA
L M OD E

CH O P
b . Install α
time-base
unit in t h e
LEF T VER T compart-
ment an d an
amplifier
u nit in t he Β ΝΟ
R ΙΖ compartment
.
ε .
Set b ot h
time- b ase u nits
for auto, external
triggering
at α
sweep rate of 0 .1
millisecond/
d ivision .
d . Set t
he cali b ration
fixture Test
switc h to V ert
or
H oriz F re q
R esponse .
e . P
osition t h e traces
to t h
e vertical an d h
orizontal
center
lines of t he
gratic u le . U se t
he calibration
fixture
P osition
control to
position t he
vertical trace
and t he
am p lifier
unit position
control to p
osition t h e
h orizontal
trace .
4- 8
-,/f . C HE CK -T
h e vertical trace
aligns with t
he center
vertical
line with in 0 .1
division an
d t h e h
orizontal trace
aligns
with t h e
center h orizontal
line wit h in 0 .1
d ivision .
%,
/g
. AD JU ST-
F ront-panel
T R AC E R
OTATIO N ad ju st-
ment ( h orizontal
alignment) and
Υ Axis Align
a d j ustment
(vertical alignment)
R 41173 (see
F ig . 6-31)
so t he traces
align
wit h t he
vertical an d h
orizontal center
lines .
h . I N T ER
ACTIO N -C h ec
k step 8 .
8 .
A d j ust Auto-
F ocus O p
eration
α . Set t
he cali b ration
fixture Test
switc h to V e r t o
r
H oriz
+ Ste p R esp, a nd
t he R ep R ate switc
h to 10 kH z .
b . Set t h
e time- b ase
u nit for a u to,
internal triggering
at
α
0 .1-microsecon
d /division
sweep rate
(left com p
artment) .
ε . Set
t he cali b ration
fixt u re for α
three-division d is p lay .
d .
Set t he I NT EN
SITY control
for a low-intensity
d is p lay .
Set t h e F OC
U S control a
nd ASTIG a dju
stmen t fo r
α
well- d efi n e d d is p
lay .
e
. Set t h e I N T
EN SITY control
for maximum
d is p lay
intensity .
f . AD JU
ST-Auto F ocus
Gain a djustment R
41127 (see
F ig . 6-31) for α
well- d efi n e d , h ig
h -i n te n sity d is p
lay .
g . Set t he I
N T EN SITY co
n trol for a
low-intensity
d isplay .
h . Con
n ect the test
oscilloscope
10 Χ p ro b e ti p
to t he
j u n ction
of R 41131-C
R 41157- R
41155-C R 41155 (see
F ig .
6-31) .
i . Set t he
test oscillosco
p e for α
vertical d
eflection
factor of one
volt/ d ivision
(10 volts/division
at pro
be ti p ),
an d α sweep
rate of 200
nanoseconds/
d ivision .
j . Wh ile
ob servi ng t h e
test-oscillosco p
e d is p lay, r
otate
t h e I N T EN
SITY con trol
b etween t h e
minim u m and
maxi-
mum d is p
lay-i n te n sity
levels . If
necessary, re p
osition t he
gimmic k -ca
p acitor
wire located
around R 41131
(see F ig .
6-31)
for b est s q
uare corner on
d isplaye d pulse
t hr oug h out
t he rotation
of t he I N T EN
SITY control .
REV . Β ,
ΜΑΥ , 1976

Tektronix 7704A Specifications

General

Brand	Tektronix
Model	7704A
Category	Test Equipment
Language	English