CS-1022,
1021. 1012*
Fig.
26
Typical phase measurement oscilloscope displays
• Frequency Measurement
1.
Connect
the
sine wave
of
known frequency
to the
chan-
nel
2
INPUT jack
of the
oscilloscope
and
select
X—Y
operation.
This provides external horizontal input.
2.
Connect
the
vertical input probe
(CH1
INPUT)
to the
unknown frequency.
3. Adjust
the
channel
1 and 2
size controls
for
convenient,
easy-to-read size
of
display.
4.
The
resulting pattern, called
a
Lissajous pattern, shows
the ratio between
the two
frequencies.
Unknown frequency
to
Vertical input, Standard
frequency
to
Horizontal
input
See note
See note
Ratio
of
unknown
to standard
1/2:1
1:1
1-1/2:1
6:1
Note:
Any one of
these figures, depending
upon phase relationship
Fig.
27
Lissajous waveforms used
for
frequency
measurement
CS-1020,
1010
* Frequency Measurement
1.
Connect
the
sine wave
of
known frequency
to the EXT
TRIG INPUT jack
of the
oscilloscope
and set the
TRIG
MODE switch
to X-Y.
This provides
X-Y
operation.
2.
Connect
the
vertical input probe
to the
unknown fre-
quency.
3. Adjust
the
vertical
and
horizontal size controls
for a
con-
venient, easy-to-read size
of
display.
4.
The
resulting pattern, called
a
Lissajous pattern, shows
the ratio between
the two
frequencies.
Unknown frequency
to
Vertical input, Standard
frequency
to
Horizontal
input
See note
See note
Ratio
of
unknown
to standard
1/2:1
1:1
1-1/2:1
6:1
Note:
Any one of
these figures, depending
upon phase relationship
Fig.
27
Lissajous waveforms used
for
frequency
measurement
28
No amplitude distortion,
no
out of
phase
Amplitude distortion,
no
out of
phase
180°
out of
phase
No amplitude distortion,
out
of
phase
Amplitude distortion,
out
of
phase
90°
out of
phase
No amplitude distortion,
no
out of
phase
Amplitude distortion,
no
out of
phase
180°
out of
phase
No amplitude distortion,
out
of
phase
Amplitude distortion,
out
of
phase
90°
out of
phase
Fig.
26
Typical phase measurement oscilloscope displays
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