Tektronix 2221 User Manual

Basic
Applications —
2221
Operators
MAKING
NONSTORAGE
MEASUREMENTS
2
The
following
procedures
will
enable the
operator
to perform
some basic
measurements
and
familiarize
the
operator
with
the
conventional
oscilloscope
capabilities
of
the 2221 .
AC
PEAK - TO -
PEAK VOLTAGE
To make a
peak - to - peak
voltage
measurement
,
use the
following
procedure :
POSITION TO
CENTERLINE
B
100
NOTE
90
This
procedure
may also be
used
to
make voltage
measurements
between any two
points on
the
waveform .
U
A
VERTICAL
DEFLECTION
10
!
07 .
V
u
1.
Preset
instrument
controls
and
obtain a
baseline
trace .
5V
50us
MEASURE AMPLITUDE
FROM ( A ) TOB
2.
Apply the ac
signal
to
either vertical -
channel input
connector and set
the
VERTICAL
MODE Switches to
display the channel used .
4998-30
بألا
Figure
6-1 .
Peak - to -
peak
waveform
voltage
.
3. Set
the
appropriate
VOLTS / DIV
switch
to
display
about
five
divisions of
the
waveform ,
ensuring
that the
VOLTS / DIV
Variable
control
is
in the
CAL detent .
NOTE
4.
Adjust the
TRIGGER
LEVEL
control
to
obtain a
stable
display .
A more
accurate
value
can be
obtained
by
measur
ing
from the
top of a
peak to the
top of
a
valley .
This
eliminates
trace
thickness
from the
measure
ment .
u
5.
Adjust the SEC /
DIV
switch to
display
several
cycles
of the waveform .
9.
Calculate the peak
- to - peak
voltage
,
using the
follow
ing
formula :
6.
Vertically
position the
displayed
waveform so that
the
negative peak of
the
waveform
coincides with one of
the
horizontal
graticule lines ( see
Figure
6-1 ,
Point
A ) .
Volts
( p - p )
Vertical
VOLTS / DIV Probe
Deflection
X Switch
X Attenuation
(
Divisions )
Setting Factor
7. Horizontally position the display so that one of the
positive
peaks
coincides
with the
center
vertical
graticule
line ( see
Figure 6-1 , Point
B ) .
EXAMPLE :
The
measured
peak - to - peak
vertical
deflection is
5
divisions ( see
Figure 6-1 )
with a
VOLTS /
DIV
switch
setting of 0.5 V ,
using
a
10X
probe
.
Substituting the given values :
8.
Measure
the
vertical
deflection
from
peak
to
peak
( see Figure 6-1 , Point A to Point B ) .
Volts ( p - p ) = 5 div x 0.5 V / div X 10 = 25 V
6-4

Tektronix 2221 Specifications

General

Brand	Tektronix
Model	2221
Category	Test Equipment
Language	English