Tektronix 2221 User Manual

Basic
Applications
—
2221
Operators
C
C
NOTE
5.
Adjust the
TRIGGER
LEVEL control for a
stable
,
triggered
display
.
6. Set
the SEC /
DIV
switch for the
desired
number
of
cycles of displayed signal . Then adjust the FOCUS control
for
the
best -
defined
display .
The
display obtained
when
sinusoidal
signals are
applied to the X- and Y - axis is called a Lissajous
Figure
.
This
display
is
commonly
used
to
compare
the frequency and phase relationship of the two
input signals .
The
frequency
relationship of the two
input signals
determines the
pattern seen . The
pat
tern will be stable only if a common divisor exists
between
the
two
frequencies
.
บ
U
Magnified Sweep
Display
1.
Preset the
instrument
controls and
obtain
a
baseline
display .
6. Set the X - Y
button to the
out position
and
discon
nect the input
signals from the
vertical input
connectors
.
나
2.
Adjust the
Horizontal
POSITION
control to move the
area to be
magnified to
within the
center crt
graticule divi
sion ( 0.5
division
on
each side
of the
center vertical grati
cule line ) .
Change the SEC /
DIV
switch
setting as
required .
Single Sweep Display
1. Preset the instrument controls and obtain a baseline
display .
3. Pull
out the
SEC
/
DIV
Variable
knob and
adjust the
Horizontal
POSITION control for
precise
positioning of the
magnified
display .
2. For random
signals , set the
TRIGGER LEVEL con
trol to
trigger
the
sweep
on a
signal
that
is
approximately
the same
amplitude
as
the
random signal .
X -
Y
Display
1.
Preset the
instrument
controls and
obtain a
base
line
display .
3. Press
in the
SGL SWP
RESET
button
for a
moment . The
next trigger
pulse will
initiate
the
sweep
,
and
a
single trace
will be
displayed
. If
no
trigger
signal is
present , the READY indicator LED should illuminate to
indicate that the
SWEEP
Generator circuit is
set to
initiate
a sweep when a trigger signal is received .
UU
2.
Rotate the
INTENSITY
control
fully
counterclock
wise
and
disconnect
the
CH
1
input
signal .
3.
Use two
coaxial
cables or
probes of
equal
delay
and
apply the
vertical signal ( Y - axis ) to
the CH 2
OR Y input
connector and
the
horizontal
signal
( X -
axis ) to
the CH
1
OR
X
input
connector .
4. When the
single sweep has
been
triggered and the
sweep is completed , the sweep logic circuitry is locked
out .
Another sweep
cannot be
generated
until the
SGL
SWP
RESET button is
pressed
in to
set the
Sweep
Gen
erator
to
the
READY
condition .
4.
Set the
VERTICAL
MODE
switch to
X - Y (
button in ) .
DIGITAL
STORAGE
DISPLAYS
5.
Advance
the
INTENSITY
control
until
the display is
visible
. If
the
display is not
visible
with
the
INTENSITY
control at
midrange
, press
and hold in the
BEAM FIND
button while
adjusting the
Channel
1
and
Channel
2
VOLTS /
DIV
switches
until
the
display is
reduced
in
size ,
both
vertically
and
horizontally .
Center the
compressed
display with the
POSITION
controls
(
Channel 2
POSITION
control for
vertical
movement ;
Horizontal
POSITION
con
trol for
horizontal movement ) .
Release the BEAM
FIND
button
.
Adjust the
FOCUS
control for a
well -
defined
display .
The
following
procedures
explain how to set up
and use
the digital storage capabilities of the instrument . The
front - panel
control
selections set the
conditions
under
which a
waveform is
acquired for
display .
Display
ampli
tude is
controlled
by
the
VOLTS
/ DIV
switches
. The
storage time base is
controlled
by
the SEC /
DIV
switch
,
and the
CURSORS
controls
.
The SEC
/ DIV
switch
and the
TRIGGER
Mode
switch will
acquire
and
display
waveforms
using
parameters
of
Table 3-2 .
UU
6-2

Tektronix 2221 Specifications

General

Brand	Tektronix
Model	2221
Category	Test Equipment
Language	English