Tektronix 2221 User Manual

Basic
Applications —
2221
Operators
Л
П
П
n
O
100
CH 1
SIGNAL
WITH
UNWANTED
FREQUENCY
COMPONENT
90
100
90
10
CH 2
SIGNAL
FROM
UNWANTED
FREQUENCY
SOURCE
(
INVERTED )
10
( A ) CH 1 AND CH 2 SIGNALS .
1 V
100
П
2ms
HORIZONTAL
DISTANCE
90
4998-34
SIGNAL WITH
UNWANTED
FREQUENCY
COMPONENT
CANCELED
OUT
Figure 6-5 . Time duration .
10
П
( B ) RESULTANT SIGNAL .
6.
Measure the
horizontal
distance
between the
time
measurement
points
.
4998-33
Figure
6-4
.
Common -
mode
rejection
.
7.
Calculate
time
duration ,
using the
following formula :
Time
Duration
Horizontal
SEC / DIV
Distance (
Divisions )
Х
Switch
Setting
Magnification Factor
TIME
DURATION
on
n
П
n
To
measure time
between two
points
on a
waveform ,
use the
following procedure
:
EXAMPLE : The
distance between
the
time
measurement
points is 8.3
divisions
( see
Figure 6-5 ) ,
and the
SEC / DIV
switch
is set
to 2 ms .
The X10
Magnifier
switch
is
pushed
in (
X1
magnification ) .
1.
Preset
instrument
controls
and
obtain a
baseline
trace
.
Substituting the given values :
Time
Duration
8.3
div x 2
ms /
div
16.6
ms
2.
Apply the
signal
to
either
vertical
-
channel
input con
nector and
set the
VERTICAL MODE
switches to
display
the
channel
used
.
AMPLITUDE
COMPARISON
3.
Adjust the
TRIGGER
LEVEL
control
to
obtain a
stable
display .
4.
Set the
SEC /
DIV
control to
display
one
complete
period of the
waveform
.
Ensure that the
SEC / DIV
Variable
control
is in
the CAL
detent
.
In
some
applications it may
be
necessary to
establish
a
set of
deflection
factors
other
than those
indicated by
the
VOLTS / DIV
switch
settings .
This is
useful
for
comparing
unknown
signals to
a
reference
signal of
known
amplitude .
To
accomplish this
, a
reference
signal of
known
amplitude
is first
set to an
exact
number
of
vertical
divisions
by
adjusting the VOLTS / DIV switch and Variable control .
Unknown
signals
can
then be
quickly
and accurately
com
pared
with
the
reference
signal
without
disturbing the
set
ting of
the
VOLTS
/ DIV
Variable
control . The
procedure is
as
follows
:
5.
Position the
display
to
place the time -
measurement
points
on
the
center
horizontal
graticule line ( see
Figure
6-5 ) .
П
П
П
П
C
6-7

Tektronix 2221 Specifications

General

Brand	Tektronix
Model	2221
Category	Test Equipment
Language	English