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EXAMPLE:
The reference signal amplitude
is
30 volts,
with
a
VOLTS/DIV
switch setting
of
5
and
the
VAR
VOL
TS/DIV
control adjusted
to
provide a vertical
deflection
of
exactly
four
divisions.
Substituting
these
values
in the vertical conversion factor
formula:
Vertical
Conversion
Factor
30 volts
4 divisions X 5 volts/division
1.5
For the unknown signal, the
VOL
TS/DIV
switch setting
is
1,
and
the peak-to-peak amplitude
spans
five vertical
divisions. The arbitrary deflection factor
is
then determined
by substituting values in the formula:
Arbitray
Deflection = 1.5 X 1 volt/division = 1.5 volts/division
Factor
The amplitude
of
the unknown
signal
can
then
be
determined by substituting values in the unknown signal
amplitude formula:
Amplitude
= 1.5 volts/division X 5 divisions = 7.5 volts.
TIME DURATION
1. Obtain a Normal Sweep Display (ensure
that
the
VAR
TIME/DIV
control
is
set
to
the calibrated
detent).
2.
Set the
TIME/DIV
switch
for
a single event
and
position the display
to
place the time-measurement
points on the center horizontal graticule line
(see
Figure 18).
.~
...
....
/
~
.
...
....
....
....
....
....
90
\
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j_
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l
j
~~
..
I
\
I
.... .... .... ....
....
....
·'
.-/
.... ....
HORIZONTAL
DISTANCE
1738·20
Figure 18.
Time
duration.
@
465B/DM44
Operators
47
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