pulse and adjust until the rising portion
is
centered at
some
vertical graticule line
(see
Figure 29, Point A).
7. Record the
DELAY
TIME POSITION control dial
setting.
8.
Press
CH
2
VERT
MODE
push
button
and
release
CH
1
push
button.
Adjust Channel 2 POSITION and
CHANNEL1
HORIZONTAL
REFERENCE)
~
DIFFERENCE
~
I
CHANNEL2
(
(A)
100
9
10
"'
I I
If'--_
I
r---,..
~
·,..
1-
I
h
...
........ ···:i···
~
.
...
MEAsuRb
~
NTE
~SIFII=n
"""'
TIME
-
'
"
ZpNE
""
FROM
AT
OB
c
~
2
SIGNAh+++
I
CH
1 SIGNAl
I
I I
"'
CH
1 SIGNAL" •
....
~
····_I···
·J
....
_1
••••
AFORCH
1-
I I I
~FORI
CH
2
1
'VERTICAL
REFERENCE
LINE
2756·29
Figure
29.
Time
differ&JJCtl
between
two
time·related pulses, delayed
sweep display.
TRACE
SEP
controls
if
necessary.
Use
the
DELAY
TIME
POSITION control
to
move the Channel 2
pulse (rising portion)
to
the
same
vertical reference
line
as
the Channel 1
pulse
(see
Figure 29, Point
8).
9. Record the
DELAY
TIME
control dial setting.
10. Determine time difference using the following
formula:
[
second
first
J[A
TIME/DIV]
= dial - dial switch
Difference
setting setting setting
Time
EXAMPLE: The A
TIME/DIV
switch
is
set
to
50
/JS,
and
the
8
TIME/DIV
switch
is
set
to
2
/JS.
The
DELAY
TIME
POSITION dial setting
for
the Channel 1 pulse
is
2.60 and
for
the Channel 2 pulse
is
7.1
0.
Substituting the given values:
Time Difference=
(7.1
0-
2.60) (50) = 225
/JS
DM44 DELA
YEO
SWEEP TIME
MEASUREMENTS
Most measurements
of
time, time duration, frequency,
time difference, and
rise
time
are
more easily performed
using the
TIME
function
of
the DM44
and
either the
AL
T
HORIZ
DISPLAY
or A INTEN
HORIZ
DISPLAY
mode
of
the oscilloscope. Table 6 relates the DM44 functions and
oscilloscope operating modes
with
crt
displays obtained.
64
465B/DM44
Operators
@
I
I
I
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I
I
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