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Tektronix 475A - Frequencv Measurements; Time Duration

Tektronix 475A
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ju
a
ba
kr
ka
s
SE
a
HORIZONTAL
DISTANCE
Fig,
18.
Time
duration.
Measure
the
horizontal
distance
between
the
time
measurement
points.
Multiply
the
distance
measured
by
the
setting
of
the
TIME/DIV
switch.
If
sweep
magnification
is
used,
divide
this
answer
by
10.
EXAMPLE:
The
distance
between
the
time
measure-
ment
points
is
8.3
divisions
(see
Fig.
18)
and
the
TIME/DIV
switch
is
set
to
2
ms
with
the
magnifier
off.
Using
the
formula:
horizontal
i
Time
|
Å
Time/Div
A
==
distance
X
i
Duration
Nan
setting
(divisions)
magnification
Substitute
the
given
values:
Time
Duration
FREQUENCY
MEASUREMENTS
Time
Duration
measurements
can
be
used
to
determine
the
frequency
of
a
recurrent
signal
as
follows:
1.
Measure
one
cycle
of
the
waveform
as
described
in
Time-Duration
Measurements.
2.
Take
the
reciprocal
of
the
time
duration
to
deter-
mine
the
frequency.
EXAMPLE:
The
frequency
of
the
signal
shown
in
Fig.
18,
which
has
a
time
duration
of
16.6
milliseconds
is:
1
1
nene
time
duration
u
16.6
ms
=
60
hertz
38
475A/DM44
Operators
@

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