Tektronix 465M User Manual

AIR FORCE
T033A1-13-496-1
NAVELEX 0969-LP-170-0010
Operation Instructions
_1^The Z Axis Amplifier
input signals
are applied
to
the emitter of common base
amplifier
0514. Transistor
0514
provides isolation between
the signal
sorces and
the Z
Axis Amplifier. The algebraic
sum of the
signals
applied
to
the emitter of 0514 determines
the
current
supplied
to the
base
of
0518.
^Transistor 0518
is an
emitter follower.
The
signal on the emitter
of 0518
drives
0524 and
0526.
^
Transistors
0524 and
0526 are
connected
as
a complementary
symmetry
amplifier.
The
signal from
the
emitter
of 0518 drives
both bases
and
the output
is taken
from
the junction of
the two
collectors.
This
output signal
is
supplied
to
the
crt control grid
through
the
dc restorer
portion of
the CRT Circuit.
(b)
BEAMFINDER
Z-Axis
Amplifier
Operation.
When the BEAMFINDER
button
is
pushed and
held,
the
Z
Axis Amplifier ignores
the input
signals
and
provides
a
visible display.
J_With
the
BEAMFINDER
button
pushed and
held, +32
volt is disconnected
from
R512
and
+5
volts
is
connected
to
R504.
2^
The
+5
volts connected
to
R504
reverse
biases CR506
and CR505.
This
disconnects
the
input
signals from the
emitter
of 0514.
^When +32
volts is removed
from
R512,
the
base of
0518 is pulled
slightly
more
negative
through
R514.
This sets
conduction
in
0518
at a level
which
pro-
vides
a visible display
regardless of
the
Z Axis
Amplifier
input
signals.
(2)
Crt Circuit. Figure
FO-9
shows
the
CRT
Circuit.
The
CRT Circuit
provides the
high
voltage
levels
needed
to
operate
the crt.
The CRT
Circuit
consists
of
the high
volt-
age
oscillator, high
voltage
regulator,
high
voltage
rectifier,
high
voltage
multiplier,
and
dc restorer,
(a) High
Voltage
Oscillator.
The
high
voltage
oscillator
consists
of
0552,
0556,
T550
and
associated
circuitry.
Figure
4-13
shows
the
waveforms
produced
in
the
high
voltage
oscillator.
2
To
explain
the high
voltage
oscillator,
we
must
choose
a
given
point in
an
oscillation
and
describe
the
sequence
of
events.
Assume
pin
3
of T550
is
going
more
positive and
pin
5
is
going
less
positive.
2
As pin
3
of
T550 goes more
positive,
the volt-
age
across the feedback
winding
of T550 (between
pins
3
and
6)
adds
to
the voltage
on
C548. When the
voltage on
pin
3 becomes sufficiently
positive,
it pulls the
base of
Q552
positive
enough
to
turn
on Q552.
p-
0552
STARTS
CONDUCTING
Figure
4-13.
Waveforms produced
in the high
voltage
oscillator
4-24

Tektronix 465M Specifications

General

Brand	Tektronix
Model	465M
Category	Test Equipment
Language	English