Tektronix 2221 User Manual

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Л
Basic
Applications
-
2221
Operators
5.
Read
the
time
difference
between the
two
measure
ment points of interest .
TV
FIELD
SIGNAL
The
television
feature
of the
instrument can
also be
used
to
display TV
Field
signals
.
6.
Slope is
determined by
using the
measured
voltage
and
time
to
calculate the rate
of
change
using the
follow
ing
formula :
1.
Preset
instrument
controls and
obtain
a
baseline
trace .
Slope
(
rate
of
change )
Change in
voltage
Change
in
time
As an example , in Figure 6-11 , the voltage difference
between
the
measurement points is
1.74 V , and
the time
difference is
5.42
ms
.
2. Set
the
TRIGGER
Mode
switch
to TV
FIELD ( P - P
AUTO and
NORM
buttons both
pushed in ) and
set the
SEC
/
DIV
switch to 2
ms .
Substituting these values into the formula :
3. To display a single field , connect the TV signal to
either vertical - channel input connector and set the VERTI
CAL
MODE switch to
display
the
channel
used .
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П
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п
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Л
Slope
1.74
0.32
V
/
ms
5.42
ms
4. Set
the
appropriate
VOLTS
/ DIV
switch
to
display
2.5
divisions
or
more of
composite video
signal .
TV
LINE SIGNAL
5. Set
the
TRIGGER
SLOPE
switch to
either OUT ( for
positive
-
going TV
signal
sync
pulses
) or IN
( for
negative
going
TV
signal
sync
pulses
) .
C
The
following
procedure
is
used to
display
a
TV Line
signal
:
1.
Preset
instrument
controls and
select
P - P
AUTO
/ TV
LINE
TRIGGER
Mode .
6. To
change the
field that
is
displayed ,
momentarily
interrupt the trigger signal by setting the AC - GND - DC
switch to
GND and then
back to AC
until the
desired
field
is
displayed .
2.
Apply the TV
signal
to
either
vertical
-
channel
input
connector and set
the
VERTICAL
MODE Switches to
display the channel used .
NOTE
3. Set
the
appropriate
VOLTS / DIV
switch to
display
0.3
division or
more of
composite
video
signal .
To
examine
a
TV
Field signal in
more detail , use
the
X10
Magnifier .
4.
Set the
SEC
/
DIV
switch to 10
us .
5. Set
the
TRIGGER
SLOPE
switch to
either
OUT
(
for
positive
-
going TV
signal sync
pulses
)
or IN (
for
negative
going TV
signal
sync
pulses
) .
7. To
display
either
Field
1 or
Field 2
individually ,
con
nect the
TV
signal
to
both CH 1
and CH
2
input
connec
tors and select BOTH and ALT VERTICAL MODE .
П
П
П
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П
NOTE
To
examine a
TV
Line signal in
more
detail , use
the
X10
Magnifier
.
8.
Set
the SEC /
DIV switch
to a
faster
sweep
speed
(
displays of less
than one full
field ) . This
will
synchronize
the
Channel 1
display to one
field and
the
Channel 2
display to
the
other field .
6-13

Tektronix 2221 Specifications

General

Brand	Tektronix
Model	2221
Category	Test Equipment
Language	English