Tektronix 2236 User Manual

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Operating Procedures - 2236 Operators
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 .
f
100
C
C
NEGATIVE
REFERENCE
LINE
90
KB
4. Adjust the A TRIGGER LEVEL control to obtain a sta
ble
display
VERTICAL
DEFLECTION
OX
5. Set the A SEC / DIV switch to a position that displays
several
cycles of the
waveform .
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6. Vertically position the display so that the negative
peak of the
waveform
coincides with one of the
horizontal
graticule lines ( see Figure 4-1 , Point A ) .
POSITIVE
REFERENCE LINE
A
MEASURE POSITIVE
AMPLITUDE
Атов )
OR
NEGATIVE AMPLITUDE
CTOB
4115-07
7. Horizontally
position the
display so that
one of the
positive peaks coincides with the center vertical graticule
line ( see Figure 4-1 , Point B ) .
Fig . 4-1 . Peak - to - peak waveform voltage .
1
Instantaneous
Voltage
To measure instantaneous level at a given point on a
waveform ,
referred to ground
, use the
following
procedure :
8. Measure the vertical deflection from peak - to - peak ( see
Figure
4-1 ,
Point A
to
Point B ) .
1.
Preset instrument
controls and
obtain a
baseline trace .
NOTE
If the
amplitude measurement
is critical
or if the trace
is thick ( as a result of hum or noise on the signal ) , a
more accurate value can be obtained by measuring
from the top of a peak to the top of a valley . This will
eliminate trace thickness from the measurement .
2.
Apply the
signal to
either
vertical
- channel
input
con
nector and
set the
VERTICAL
MODE
switch to
display the
channel
used .
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3.
Verify
that
the VOLTS
/
DIV
Variable
control
is
in
the
CAL detent and
set the
Coupling
switch
to
GND .
9. Calculate
the peak
- to - peak
voltage , using
the
follow
ing
formula :
Volts
( p -
p )
vertical
deflection
( divisions )
х
VOLTS /
DIV
switch
setting
indicated
by
1X
probe
x attenuation
factor
4.
Vertically position
the
baseline
trace to
the center
hori
zontal
graticule
line .
This
establishes
the
ground
reference
location
.
NOTE
EXAMPLE : The measured peak - to - peak vertical deflection
is 4.6
divisions ( see
Figure
4-1
) with a
VOLTS / DIV
switch
setting of
0.5 , using
a 10X
probe .
If
measurements are
to be
made
relative to a
voltage
level
other than
ground , set
the
Input Coupling
switch
to DC
instead , and
apply the
reference
voltage to the
input
connector .
Then
position the
trace to the
refer
ence (
horizontal
graticule
) line .
Substituting
the given
values
:
Volts
(
p -
p )
4.6 div x 0.5
V / div x
10 = 23 V.
5. Set the
COUPLING switch to
DC . Points on
the wave
form above
the
ground reference
location are
positive .
Those points below are negative .
When using a X10 probe the calculation can be simplified
by multiplying
the
vertical
deflection ( in
divisions ) by
the
VOLTS / DIV
switch
setting
indicated by
10X
PROBE .
NOTE
Substituting
the given
values
:
Volts (
p -
p )
If
using
Channel 2
, ensure
that the
Channel
2
INVERT
switch is in its noninverting mode ( button out ) .
4.6 div x 5 V / div
23 V.
4-2
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Tektronix 2236 Specifications

General

Brand	Tektronix
Model	2236
Category	Test Equipment
Language	English