Specifications

5. Measure the horizontal deflection of the
unknown
Arbitrary
signal in divisions and calculate
its time duration
Deflection
=
1.37
X
50ps/division
=
68.5ps/division
using the
following formula:
Factor
Arbitrary
horizontal
I lme
=
Deflection X deflection
Duration
-;;;;r*
"
Ai;;.,"*i
The time duration of the unknown signal can then be
computed
by substituting values in the formula:
Time
6. Frequency of the
unknown signal can then be
Duration
=
68'5
gs/division
x 7
divisions
=
480
gs
determined
by calculating the reciprocal of its time
duration.
The frequency of the unknown signal is then calculated:
-
EXAMPLE: The refergnce signal time
duration is 2.19
Freouencv -
'l
=2.083kHz
milliseconds
(2.19X10-3
seconds), with a
TIME/DIV
4809s
switch setting of 0.2
ms and the VAR
TIME/DIV control
adiusted to
provide
a horizontal deflection of
exactly eight
divisions.
PHASE DIFFERENCE
1. Obtain
a Normal
Sweep
Display
(refer
to
Basic
Substituting
these
values in the horizontal
conversion
oscilloscope
Displays section ofthismanual)'
factor formula:
2. using
probes
or
coaxial cables with equal time delays,
Horizontal
2,19ms
connect a known
reference
signal
to one channel
Conversion
=
=
1.37
input and the
unknown
signal
to the other
channel
input.Factor
8
divisions
X
0.2
ms/divisions
For the unknown signal, the
TIME/DIV switch setting
3. Depress
the CH 1 and CH 2
VERT MODE
push
is 50ls, and one
complete cycle spans seven
horizontal
buttons.
Use either CHOP
(in)
orALT
(outl
VEBT
divisions.
The arbitrary deflection
factor is then determined MODE switch depending on the
input frequencies.
by
substituting values
in
the
formula: ln
general,
ALT
is best for high.frequency signals and
52
4658/DM44
OperatoB
@