Tektronix 7704A User Manual

Calibration-7704A Service
g . V ertically
positio n t he d isplays so t he ti p s of t
h e
mar ke r s
fall j ust below the b ottom of t h e squa
r e wave .
h . Set
t h e VER TICA L M OD E switc
h
to
ADD .
i . Set t he time- b ase un it triggeri
n g so α sta b le s qua r e-
wave d isplay is presente d only w hen t
h e
mar
k ers occ ur
during t he positive portio
n
of
t he s q ua r e wave .
j . Set t
h
e
time-base unit tr iggering for AC low-frequency
re j
ect
co
up ling, and α sweep rate of 0 .2 seco
n d /divisio n .
\/ k . C
HE
C
K -T he amou n t of
time re q uired fo r α time
mar k to d rift across t he p
ositive level of t h e s q uare
wave, to
t h e n egative level a
n d bac k to t he positive
level, m ust not
4- 2 0
exceed 0 .4 second (0 .2 secon d if outside t he +15°C to
+35°C tem p e r ature r ange) . T h is time can be meas u
red
di r ectly from t he d isplay b y obse
r vi ng t h e n umber of
d ivisio ns t h at t he mar k er
moves across t he dis p lay a r ea
b efore it retur n s to t h e positive
level .
Ι . AD JU
ST-1 kH z ad ju stme n t
R1001 (see F ig . 6-35)
for α
time n ot to excee d 0 .4 seco
nd for αtime ma rk to d
r ift
across
t he p ositive level of t h
es qu are wave to t he
n egative
level and bac k to t h e p
ositive level . (
Α p relimi nary
a dj ustme n t can be ma
de wit h t h e time-b ase
unit triggere d
only on t h e sq
uarewave at α 0
.2-millisecond/division
sweep rate ; a
dj ust R 1001 for
min im u m d r ift of t h e
mar k ers .)
m . Disconnect all
test e qu i p me n t and r emove t h e
p
lug-i
n
u
n
its .
REV . Β , N O V . 1974

Tektronix 7704A Specifications

General

Brand	Tektronix
Model	7704A
Category	Test Equipment
Language	English