Tektronix 2246 User Manual

Measurement
Processes
and
Applications—-2246
Operators
FREQUENCY
BEZ: | | [sie] T]
LA Ay
Th
Co
Ca
a
ae
E
E
Sima
ieee
EME
|
|
|
M
[sk
Figure 6-12, Frequency measurement.
measurement
aids.
Notice
that
on
the
left
edge
of
the
gra-
ticule
the
number
0%,
10,
90,
and
100
are
etched.
These
marks
provide
convenient
reference
points
when
the
signal
to
be
measured
is
properly
set
up.
Use
the
following
pro-
cedure
steps
as
a
guideline
in
making
rise-time
measure-
ments.
1,
Set
up
the
signal
to
be
measured
and
the
front
‚
panel
controls
as
indicated
in
steps
1
and
2
of
the
+PEAK
VOLTAGE
MEASUREMENT
procedure.
2.
Set
the
VOLTS/DIV
and
VOLTS/DIV
VAR
controls
to
provide
an
exact
five-division
vertical
display.
3.
Use
the
Vertical
POSITION
contro!
to
place
the
negative
amplitude
of
the
signal
on
the
0%
reference
line
and
the
positive
amplitude
on
the
100%
reference
line.
4,
Advance
the
SEC/DIV
setting
to
stretch
out
the
ris-
ing
edge
of
the
waveform
as
much
as
possible
to
improve
the
cursor
placement
accuracy
(see
Figure
6-13).
NOTE
if
measuring
fall
time,
use
negative
SLOPE.
This
places
the
trigger
point
at
the
beginning
of
the
Sweep
so
that
when
the
SEC/DIV
setting
is
advanced,
the
slope
of
interest
remains
within
the
viewing
area.
6-14
5.
Increase
the
A
INTEN
control
if
necessary
to
brighten
the
beginning
of
the
trace,
and
use
the
Horizontal
POSITION
control
to
place
the
rising
edge
of
the
waveform
at
the
center
vertical
graticule
line.
6.
Press
CURSORS
and
select
the
i-
SEC
>|
menu
choice.
7.
Use
the
I-
OR
DELAY
control
to
align
the
first
cur-
sor
to
the
rising
edge
at
the
point
it
crosses
the
10%
refer-
ence
graticule
line.
Then
use
the
-I
OR
A
control
to
align
the
second
cursor
to
the
point
that
the
rising
edge
crosses
the
90%
graticule
line
and
read
the
rise
time
displayed
in
the
top
line
of
the
crt
readout
(see
Figure
6-13).
Phase Measurements
Making
a
phase
measurement
is
done
by
first
setting
a
reference
for
the
full
360
degree
waveform
period.
Use
the
following
procedure
as
a
guide.
1.
Apply
the
reference
waveform
to
the
CH
1
input
connector
(any
channel
may
be
used,
but
CH
1
and
CH
2
provide
the
most
signal
scaling
possibilities).
Use
the
standard
10X
attenuator
probe
supplied
with
the
instru-
ment
to
make
the
signal
connections
as
they
produce
very
little
signal
loading
to
a
circuit
under
test
and
produce
matched
delays.
For
phase
measurements,
external
:load-
ing
of
a
circuit
and
different
delays
in
the
signal
connection
paths
will
produce
incorrect
results.
RISETIME
gece
|
ed]
|
ae
ai
||
|
|
T
AN-
ace)
cee
Zee EERE
EHRE
=A BEIN
Figure 6-13. Rise time measurement.
REV APR 1987
rm
ee,
—, En
y = i ; : | + | : i 3 : j
wm

Tektronix 2246 Specifications

General

Brand	Tektronix
Model	2246
Category	Test Equipment
Language	English