APPLICATION
5. Using
the
DELAY TIME MULTIPLIER adjust
the
falling
edge
of the
pulse
so
that
it
touches
the
center horizontal
graduation line
and is
intensified.
The pulse width
is the
second dial reading minus
the
first dial reading multiplied
by the A
SWEEP TIME/DIV
setting.
Using
the
formula:
Pulse width
= (2nd
dial reading-1st dial reading)
x Delayed sweep time
(A
SWEEP TIME/DIV setting)
[EXAMPLE]
In
the
example,
the
first dial reading
is 0.61 and the
second
is
5.78
with
the A
SWEEP TIME/DIV setting
at 2/is.
Substituting
the
appropriate values
Pulse width
=
(5.78-0.61)
x 2 (/is) =
10.34/is
FREQUENCY
MEASUREMENTS
USING
DELAYED SWEEP
The frequency
is
obtained
as the
reciprocal
of the
period
of
one cycle.
1.
Measure
the
period
of the
waveform using
the
procedure described above
for
time measurement.
2.
The
frequency
is
then
the
reciprocal
of the
period
measured.
Using
the
formula:
Freq
= ——
Period
[EXAMPLE]
For
the
example,
the
period measured
is
40.2/is, making
the
frequency simply.
Substituting
the
given value:
Freq
=
1/(40.2
X 10~
6
) %
24.88
kHz
PULSE REPETITION TIME
Using
the
delayed sweep feature, reliable time measu-
rements
can be
made.
1.
Apply
a
signal
to the
INPUT
and set the V
MODE
to the
channel
to be
used.
Adjust VOLTS/DIV
to
obtain
a
normal easy
to
view
display
of the
waveform.
2.
Adjust
the A
SWEEP TIME/DIV
so
that
at
least
two
cycles
of the
waveform
are
displayed.
Set
the
HORIZONTAL DISPLAY
to
A-INT-B
and
pull
out
the B
SLOPE control
to
affect
the
STARTS AFTER
DELAY mode
of
operation.
Set
the B
SWEEP TIME/DIV
as
fast
a
sweep speed
as
possible.
3. Using
the
DELAY TIME MULTIPLIER, adjust
the
intensified portion
to
coincide with
the
first pulse.
Set
the
HORIZONTAL DISPLAY
to ALT and use *
TRACE
SEP to
adjust
the
waveforms
for
easy viewing.
4.
Using
the
DELAY TIME MULTIPLIER,
set the
pulse
to
coincide with
one of the
vertical graduation lines
and
record
the
dial setting
at
this point.
5. Again using
the
DELAY TIME MULTIPLIER, adjust
the
second pulse
in the
same manner
to the
vertical line
used
in
step
4,
recording this dial setting
as
well.
The
pulse repetition time
is the
second dial reading minus
the first dial reading multiplied
by the A
SWEEP
TIME/DIV control setting.
Using
the
formula:
Pulse repetition time
= (2nd
dial reading—1st dial
reading)
x
Delayed sweep time
(A
SWEEP TIME/DIV
setting)
5-10
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