Tektronix 465M User Manual

AIR
FORCE
T033A1
-13-496-1
NAVELEX
0969-LP-170-0010
Operation
Instructions
A
TRIGGER
GENERATOR
—
ABOUT
too ms
PRODUCES
A
SWEEP
GATE
Figure
4-12 Waveforms
produced
during
AUTO
sweep
gate generation.
on.
Capacitor C2757
discharges
rapidly
through
transistor
A.
This
sets input
X
of the
AUTO
gate logic LO
which
dis-
ables the logic.
Now
another
AUTO
gate
can not
be
gener-
ated at
pin 6
of
U2750
until C2757
charges
enough to
set
input X of
the AUTO
gate
logic
HI (about
100
milliseconds
after the
beginning
of
holdoff).
(c)
Single
Sweep
Control.
When the
TRIG
MODE
switch (S2750)
is set to
SGL
SWP, pin 1
of
U2750
is
con-
nected
to
ground.
Now,
when
adequately
triggered,
only
one sweep
ramp
will be
generated.
After one
sweep is
dis-
played, another
sweep can't
be
presented
until after
the
SGL
SWP button has
been
pushed.
Figure
4-10
shows a
functional block
diagram
of the Sweep
Control
integrated
circuit and associated
circuitry.
JLTo
operate in
the single sweep
mode,
pin 1
of
U2750 is
grounded and
pin 2 is pulled HI
through
R2752. This holds
the R
input of the
single sweep
latch
within
U2750 HI.
^
At
the
end
of sweep
ramp
generation,
the
Q
output
of the
holdoff
latch
steps HI.
This
HI is
connected
to the S
input of the
single
sweep
latch
and
sets
the
latch.
The Q output
of the
single
sweep
latch holds
pin 9
of
U2750
HI
even
after
the.
holdoff
latch
has
reset.
This
per-
manetly
holds
off
the A
Trigger
Generator.
3^ To
reset
the
single
sweep
latch,
the SGL
SWP
button”must
be
pushed
and
released.
When
the SGL
SWP
button
is
pushed,
pin
2 of U2750
is set
LO
which sets
the
R
input
of
the
single
sweep
latch
HI.
When
the
SGL
SWP
button
is
released,
pin 2
of U2750
steps
HI causing
a
negative
going
transition
on the
R input
of the
single
sweep
latch.
This
transition
resets the
single
sweep
latch.
The Q
output
of
the
single
sweep
latch
goes
LO
which
sets
pin 9
of
U2750
LO
and
terminates
holdoff.
c.
Main
Module.
(1)
Z-Axis
Amplifier.
Figure
FO-9 shows
the
Z-Axis
Amplifier
circuitry. The
Z-Axis
Amplifier
consists
of
0514,
0518, 0524,
0526
and associated
circuitry.
(a)
Normal
Z-Axis
Amplifier
Operation.
The
Z-
Axis
Amplifier
accepts
signals
from several
sources,
ampli-
fies them,
and
supplies
a
control signal to
the
CRT
Circuit
to
control
display
intensity.
The sources
of the
signals
used
to
control
display
intensity are:
Vertical
Switching
Control
circuit, A
Sweep
Generator, and
the
B
Sweep
Generator.
4-23

Tektronix 465M Specifications

General

Brand	Tektronix
Model	465M
Category	Test Equipment
Language	English