Tektronix 7704A User Manual

Circuit Description
-7704A Service
Th e Display
R
ig
h
t
Comman d switc hes from HI to
L O
along wit h t h e
Display Α level at p in 7 (inverse of
MF
C h annel Switc
h Signal, Dis p lay Β ) .
H owever, notice t h at
t h e
Display R ig ht Comman d
ch anges fromΗΙ to L O as th e
MF C h annel Switc h Signal (Display
Β
)
ch anges from L O to
ΗΙ ,
and
vice versa .
3 . A L
T
O
RCH O P M OD E ( H O R IZ)-D
EL AY E D
If th e Α time-base unit is
set
to
t h ed elaye d mo d e w
h en
t
he H O R IZO N TA L
M OD E switc h is set to eit
her A L T or
C H O P , th e operation of t
h e stage is ch ange d from t
h
at
d iscusse d above
. Now, the Dis p lay R ig h t
Command
switc hes
between the HI and L O states at α
rate that is
one- half t
he repetition rate of t
h
e
MF C h annel Switc h
Signal
(Display Β ) . Th e resultant
C R T d isplay allows the
R IG H T VER T u nit to be d isplaye
d first against the
Α
sweep ( d elaying) and t
h en against th e Β swee p (delayed) .
T h en th e d isplay switc h
es
to t
he LEF T VER T unit and is
d
isplaye d consecutively against
the Α an d Β sweeps in the
same manner . T h e
input conditions for t h is mode of
operation are :
(
Α '
ΙΒ
)
MF C h a nn el
Switc h Sig n al
(Dis play Β )
I npu t
Φ = H as no
effect i n t h is case .
η +1 = If o
utput is L O pr ior to
L O I it goes HI, a
nd vice ve r sa .
Ι Actu
ate dby n egative-goi
n g e d ge .
2 R e p etitio n
r
ate
on e- h alf Alte rn ate Pu
lse rate .
3 R e p etitio n rate
on e- h alf Display Β
rate . MF C h an nel
Switc h Sign al (Display Β )
O u t pu
t
U
2535
2- 1 8
F ig . 2-12 . ( Α ) L ogic
d iagra m for V ertical B
i nary stage ;
(
Β ) Table of
i npu t/o u tp u t co mb inatio
n
s .
L O
I
L O Φ
Φ ΗΙ η
+1
2
Α or Β
Φ HI
HI L O
L O HI
Display R ig ht
~
A
L
To r C H O P,
Non-delayed
Mo
d e (Swee p
-slavi n
g)
Φ HI
L O ΗΙ
L O L O
Dis play L eft
Φ L O
Φ L 0 1 L O
η+1 3 1 A LT or C H O
P, Delaye d M o de

Tektronix 7704A Specifications

General

Brand	Tektronix
Model	7704A
Category	Test Equipment
Language	English