Tektronix 7704A User Manual

Maintenance-7704A
Service
Control Settings . Set t h e 7704 Α controls
as follows :
P
O
WER

O FF
VER TICA L MOD E

R IG HT
VERT T R AC E S EP A R ATIO
N ( Β ) M i d range
ΑT RIGG
ERSO UR CE

VER T M OD E
Α ΙΝΤΕΝ

M i
d
range
H O R IZO N TA L MOD
E

Α
Β ΙΝΤΕΝ

M i d range
Β T RIGG ERSO UR C
E

VER T M OD
E
RE
ADO
U
T

O
FF
Ad j ust V ertical Interface
Centering an d Gain . To cali-
brate t he V ertical Interface,
set t h e controls as given un d er
Control Settings a nd p
roceed as follows :
α .
Disconnect coaxial connectors
Ρ
4417 and
Ρ
4418
from Α 44, V ertical Amplifier board (see F ig . 3-3)
.
b . Connect

P4417 and
Ρ4418 to t h e vertical channels of
t he test oscilloscope
wit h t he a dapters and cables . (If t
h
e
test oscilloscope
h as α h ig h in put im p e dance, use 50-o
h
m
terminations at t
he vertical-c hannel in p uts .)
c . Set t h e P O WER switch to on .
d .
Set t h e test oscillosco pe for d ifferential op eration
between t h e vertical c hannels (a d de d d is p lay mo d e with
one c hannel inverte d ; invert t h e channel to w
h ic h Ρ4418 is
connecte d
),
an d α
sweep
rate of
100 microsecon d s/ d ivision .
e .
Set
t
he test-oscillosco pe vertical c h annels for α
deflection
factor of 50 millivolts/ d ivision with t h e in p uts
groun ded .
f . E stablis h α zero-volt reference level for t h e test-
oscilloscope d isplay by positioning t
he trace to t h e center
h orizontal line of t he graticule
.
Do
not ch ange t he
test-oscillosco pe p osition controls after
setting t h is level .
g . Set t h e vertical c h annels of t
h e test oscillosco p e for
DC in p ut cou p ling .
3- 8
h .
AD
JU
ST-Interface Centering a d j ustment
R
2222
(see
F ig . 3-4) for α dis p lay DC level wit
h in
0 .2
d ivision (10
millivolts) of t he zero-volt
reference level in t h e LEF T and
R IG HT p ositions of t
h e VER TICA L MOD E switc h .
i . Install t
h e signal stan d ar d
izes calibration fixture in
t he
R IG H T VER T com p artment .
j . Set t h e VER TICA L MOD
E
switc
h
to
R IG H T .
k . Set t he cali b ration
fixture Test switch to V ert or
H oriz Gain an d t h e R e
p R
ate
switc h to 10 kH z .
Ι . AD JU ST-Interface Gain a d j
ustment R
2247 (see
F ig .
3-4) for α
test-oscillosco pe d is p lay of nine traces wit
h six
d
ivisions ±0 .9 d ivision d eflection between t h e secon d an d
eig
h t
h traces (300 millivolts with in 45 millivolts)
.
m . Set t he P O WER switch to off .
η .
Disconnect Ρ 4417 an d Ρ 4418 from t h e test oscil-
loscope an
d connect t h em to t h eir res p ective j ack s on t
h e
V
ertical Am p lifier boar d .
t-f-', 0,N T OF ιΝS Τί t ι 1 ΜΕ % ηΓ "
F ig . 3-3 .

L ocatio n of
Ρ 4417 a n d Ρ 4418 on A44- V ertical Am plifie r
b oar d .

Tektronix 7704A Specifications

General

Brand	Tektronix
Model	7704A
Category	Test Equipment
Language	English