Tektronix 7704A User Manual

d . Remove t he calib
r
ation fixture from t
h
e RIG
H
T
VER T compa r tme n t and install it i n t h e LEF T VER T
com p artme n t .
e . Set t h e VER TICA L M OD E switc h to LEF T .
V f . C HE CK -Deflection b etween t he secon d an d eig h t h
traces s h oul d b e t he same as ste p 13b ±1% (six divisions
±0 .06 d ivisio n if R 4406 was a dj uste d in ste p 13c) .
g . AD JU ST-If necessa r y, com p romise the setti n g of
R4406 fo r optimum gai n fo r both vertical compartme n ts . If
re-ad ju stment is necessary, rec h eck p arts b t hrough f .
V14 . C h ec kL ow- Fre q uency L inearity
α . Set t he signal stan d ar d izer cali b ration fixture Test
switc h to V e rt o r H o r iz +Ste p R es p with t h e R ep R ate
switc h set to 1 kH z .
b . Set t he cali br atio n fixture Amplitude con tr ol so t he
dis p lay is exactly two d ivisio n s i n am p litu de in t he center
of t
h
e g
r
aticule area .
V ε . C HE CK - P osition t h e
two-division d is p lay ve r tically
an d check for not more t han 0 .1 d ivision
of
com p
ression or
ex p
ansio n anyw h ere wit h in t he graticule area
.
15 . A d j ust V ertical H ig h - F re q uency Com p ensation
α . Set t he signal stan d ar d izer cali b ratio n fixture Rep
Rate switc h to 1 MH z . Set t he Amplit ude a n d P ositio n
con tr ols for α six-divisio nd is p lay, ce n tere d on t h e graticule .
REV .
Β , ΜΑΥ
,
1976
TA BLE 4-3
H ig h F re q uency
Co m pensation
Calibration-7704A Service
b . Set t he time- b ase un it for auto, internal triggeri
n
g at
α swee p rate of 100 n anosecond s/ d ivisio n . Set t h e triggering
co n t r ols for α sta b le d is p lay trigge r ed on t he rising p ortio
n
of t he pu lse .
ε .
CHE
CK -C
h
ec
k for o ptimu m s q uare cor n er and flat
top on
d isplaye d p ulse . A b er r atio n s i n t he fi r st 50
nanosecon d s after t he ste p are n ot to excee d +0 .1 o r -0 .1
d ivisio n with total p ea k -to-pea k a b erratio n s n ot to exceed
0 .12
d ivision ;
a
b erratio n s from 50 to 150 n a noseco nd s afte r
t he step are not to excee d 0 .03 d ivision peak -to- p ea k .
( F
or
Optio n 9 : A b errations i n th e first 50 nanosecon d s after t he
ste p a r e not to exceed +0 .3 or -0 .3 d ivision wit h total
p ea k -to- p ea k ab errations not to exceed 0 .3 division ; abe rr a-
tions from 50 to 150 nanosecon ds after step are n ot to
exceed 0 .06 divisio n p ea k -to- p ea k .)
d . AD JU ST- N ig h -fre q ue n cy com p ensatio n as give n in
Table 4-3 for op timum square lea d i ng cor n er a nd flat top
wit h minim u m a b e r ratio n s with i n limits given in pa r t ε .
L ocatio n of t h e a dj ustme n ts is shown in F igs . 6-32 and
6-33 . U se t
h
e low-capacitance
screw d river
to a
dj
ust va
r ia b le
capacitors . Ad ju st t he in d uctors b y chan ging th eir p ositio n
in t he soc k ets . R epeat t he complete a dj ustme n t proced u re
as n ecessary to ob tai n op timum res po n se .
e . M ove t h e cali br ation fixture to the R IG H T VER T
compartme n t
and
set the VER TICA L M OD E switc h to
R IG
H
T .
f .
C HE C K -C
h ec k for o p timum square co rn er a n d flat
to p on dis p laye
d pu lse with aberrations with in limits give n
in p
art
ε .
Calibration
F ixt u
re
R ep R ate
B est Swee pR ate
(time/divisio n )
Ad j ustme n t P rimary A r ea of
P
ulse
Affecte d
100 H z 2
milliseco n ds R 4465
F irst 10 microseconds (flat to p )
1 kH z
0 .2 milliseco nd R 4453
F irst five microseconds (flat to p )
10 kH z
20 microsecon d s R4461
F irst on e mic r osecon d (flat top)
100 kH
z 2 microsecond s R4423
F irst 400 n anoseconds
1
MHz
100 n anosecon d s
C4424 F irst 50 nanosecond s
1 MH z 50 nanoseconds
R4427-C4427 F ive to 15 n a nosecon
d
s
- 1 MHz 20 nanoseco
nds R4404-C4401
2 to 5 nanosecond s (lea d i n g ed ge)
1 MH z
2 nanosecon d s 1-4410-1-4411
F ront cor n er
1 MHz
2 nanosecon d s R 2234-C2231
F ro n t corner

Tektronix 7704A Specifications

General

Brand	Tektronix
Model	7704A
Category	Test Equipment
Language	English