Tektronix 7704A User Manual

1 . A d j ust +54- V olt Supp
ly
α . R emove t he screws securing t h e
corners
of t
he
h eat sin k assem b ly to t he rear of t he instrument (t he
L i ne Selector assemb ly is mou n te d on t he h eat si nk
assembly) . Slide t he p ower un it out of the 7704 Α ; t he
interco nn ecti ng ca b les remain con necte d .
d . C HE CK -
M eter reading ; +54 .2 volts ±0 .25 volt . (If
t he meter
reading is with i n t he give n tolera n ce, do
not
re-ad j ust ;
ot h erwise, perform p art e .)
W A RN I NG
E xtreme caution m u st be used w
h en operating t he
7704 Α wit h t he power- u nit cover
removed due to t he
line voltage an d high -v ο ltage/ h ig h -cu
r
rent
potentials
prese n t .
b . R etur n t h e P O WER
switc h to on .
c . Connect t h e p recision DC
voltmeter b etween t h e
+54 V test point (see F ig . 6-26) an d gro
un
d .
P O WER S
UPPL Y
ΝΟΤΕ
Calibration-7704A Service
1 . P recision DC voltmeter
Eq ui p ment R e q uire d
2 . T h ree-inc h screwdriver
T h e location ofad justments and test points
for calibration is s h own on α fol d out, page 6-31, in t h
e Diagrams
section .
α . Connect t
h
e
precision DC voltmeter b etween t he
-50
V supply an d c h assis groun d (pin 6- P 32G ; see
F
ig .
6-28) .
b . C HE CK -M
eter reading ; -50 volts ±0 .2 volt .
ε . AD JU ST -50
V a dj ustment R 32133 (see F ig . 6-28)
for α meter
readi n g of -50 volts ±0 .2 volt .
d . INTERACTION-Any
change in t h e setting of
R 32133
may affect operatio n of all circuits with in t he
7704
Α
and p lug-i n units .
3 . C h ec
k R emaining P ower-Su pp ly V oltages
α . C
HE C K -Ta b le 4-2 lists t he low-voltage
power
sup-
p lies in t
he instrument . C h ec k eac h supply
with t he
p recision DC voltmeter for outpu t
voltage with i n t h e given
tolera n ce .
4-5
Control Settings
Set t h e 7704 Α controls as follows :
e . AD JU ST-+54- V ad j ustment R 3143
(bottom of
p ower supply, accessi
b le t h roug h t he cover near t he fro n t
of t
h e p ower unit ; see F ig . 6-27) for α meter reading of
+54 .2 volts .
P
O WER O
FF
VER TICA L
M
OD
E R IG H T
VER TTR AC E
f . Disconnect t he p
recision
DC
voltmeter .
SEP A R ATIO N ( Β )
M idrange
Α TR IGG ERSO UR C
E VER T M
OD
E
Α ΙΝΤΕΝ
M i d range
g . I NT ER ACTIO N -If t h
e setting of R 3143 is c h anged,
H
O
R IZO N TA L M OD E Α
ch ec k ste p s 2, 3, and 4 .
Β ΙΝΤΕΝ M i d range
Β T
R
IGG
ER
SO
UR CE VER T M OD E
I NT EN SITY M i d range
F OC U S Midrange
RE ADO U T O FF
G R AT I LLUM
M
i
d
ra
n ge
2 .
A
d j
ust -50 V olt P ower Su pp ly

Tektronix 7704A Specifications

General

Brand	Tektronix
Model	7704A
Category	Test Equipment
Language	English