I
I
I
I
I
I
I
I
I
3. Slightly readjust the
D.
TIME
control
to
superimpose
the waveforms on the 8
Sweep
display
(see
Figure 30).
4.
Read
the time duration (or waveform period) on the
DM44 Readout.
Frequency Using
DM44
To
determine the frequency
of
a recurring waveform:
1.
Measure
time duration
of
the waveform using the
preceding measurement procedure.
2.
Depress
the DM44
1/TIME
FUNCTION push
button.
3.
Read
the frequency on the DM44 Readout. Observe
the illumination
of
the 1 /ms
and
1
/p.s
indicators
and
use
the following table
to
determine frequency units.
1/ms
1/p.s
Frequency Units
OFF OFF
Hz
ON
OFF
kHz
OFF
ON
MHz
NOTE
A blinking display indicates
an
overrange condition.
This
will
occur under the following conditions:
With A
TIME!DIV
Switch Set
To
Decade
Multiples
Of
1
2
5
Rise Time Using
DM44
And
Spacing Between
Intensified Zones
Is
Less
Than
0.25 division
0.
5 division
1.0 division
This method
is
not
recommended
for
extremely fast
rise
times.
Obtain a Delayed Sweep Display,
with
controls
set
as
follows:
DM44 FUNCTION
HORIZ
DISPLAY
8
(DLY'D)
TRIGGER
SOURCE
8
TIME/DIV
DM44
D.
TIME
TIME
AINTEN
STARTS
AFTER
DELAY
Three or
four
positions
more clockwise than A
TIME/DIV
setting
To
move the time
measurement
point
to
the right
of
the reference
point
@
465B/DM44
Operators
69
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