Tektronix 7704A User Manual

General
L OGIC CI R C U IT
T
h
e
L ogic Circuit
develops control signals for use in
ot
h er circuits wit h in t h is instrument . T h ese output signals
automatically d etermine t h e correct instr u ment operation
in relation to t h e pl u g-ins installe d or selected, p
lug-i n
control settings, an d 7704
Α control settings . Α bloc k
d iagram of t h
e
L
ogic
Circuit is
s h own in F ig . 2-3 . T h is
d iagram s
h
ows t
h e source of t he input control signals, t he
outp ut
signals pro d uced b y t h is stage, and t h e basic
interconnections between b loc k s . T he interconnections
s h own are intended only to in d icate i n ter-relation
between
bloc k s and neit h er in d icate α direct connection,
nor
t
h
at
only
α single connection is made between t he given b loc k s .
Details of t he inter-relation between stages in t
h
is circuit
are given in t h e circuit descri p tion w h ic h follows .
T h is circuit d escri p tion for t
he
L ogic
Circuit is written
wit h t h e a pp roac h t h at eac h of t
he
integrate
d circuits and
its associated discrete com p onents com
p
oses an
in d ividual
stage as s h own b y t he bloc k d iagram
( F ig . 2-3) . T he
operation of eac h of t h ese stages is d
iscusse d , relating t he
in p ut sig n als or levels to t h e o u tp u t, wit h consi d eration
given to t he various mo d es of operation t h at may affect t h e
stage . Α logic d iagram is also p rovi d e d for each stage . T h ese
d iagrams are not d iscusse d in detail, but are provi d ed to aid
in relating t h e function p erforme d by α given stage to
stan d ar d logic tec h niques . It s h ould be noted t h at t h ese
logic diagrams are not an exact representation of t h e
internal structure of t h e i n tegrate d circuit, but are only α
logic
d iagram of th
e
function p erforme d by t h
e
stage . An
in p ut/output table is given, w h ere a pp lica b le, for u se along
wit h t h e circuit d escription a nd logic d iagram . T h ese
input/o u
tput ta b les d ocument t
h
e com b ination of input
con d itions
t
h
at
are
of
importance
to
perform
t
h e p rescri b
ed
f u nction
of an
in
d
ivi
d
u al
stage
.
H orizontal L ogic
Ci r cu it Descri p tion- 7704A Service
Th e H orizontal L ogic stage performs t h ree separate logic
functions : Α Sweep L oc k out, Β Sweep L ock out, an d
Alternate
P
ulse Generator .
F
igure 2-4
i
d
entifies
t
he t h ree
individual stages and t
h
e
i npu
t and outp
ut terminals
associate d wit h each . N otice t
h
at some of t
h e input signals
are connecte d internally to
more
t
h
an
one
of
t h e in d ividual
stages .
F ig . 2-4 . B rea kd ow n of separate stages wit h in H orizo n tal L ogic IC ( U
2573) sh owi ng i n puts an d ou t pu ts fo r eac h stage .
2-9
A L T M od e
(
h oriz)
Α Gate
2
( Α H oriz)
4
Α Sweep In h i b it
Χ - Υ Com p e n satio n
( Β
H
o
r iz) 5
stage
14
Α Sweep L oc ko u t
U2573(a)
Delay M od e Co n tr ol O u t
12
Β H ol d
off 13
MF Cha nn el Switc h Sig n al (Dis p lay Β
)
16
A L T M od e (
h oriz) 1
(
Α H oriz) 4 Β Sweep I nh i b it
Χ - Υ Com p ensatio n
(
Β H oriz)
5
stage
15 1 -
Β
Sweep L oc k o u t
U 2573( b )
Delay M od e Con trol O u t 12
MF C h a nn el Switc h Sig n al (Dis p lay Β )
16
( Α H oriz)
4
Χ - Υ Com pen satio n
( Β H oriz)
Α H ol d off
6
Alter
n ate
Pulse
Β
M od e
7
stage
U2573(c)
Alter n ate Pu lse
Β H ol d off 9
Α M od e 10
Delay M o de Co n t r ol O u t 12
U
2573

Tektronix 7704A Specifications

General

Brand	Tektronix
Model	7704A
Category	Test Equipment
Language	English