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No amplitude distortion,
Amplitude distortion,
no out of phase
no out of phase
No amplitude distortion,
Amplitude distortion,
out of phase
out of phase
Fig. 3 6 Typica! phase measurement oscilloscope display
* 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.
1 8 0 ° out of phase
9 0 ° out of phase
Unknown frequency to
Vertical input. Standard
frequency to Horizontal
input
See note
See note
Note: Any one of these figures, depending
upon phase relationship
Fig. 3 7 Lissajous w a v e f o r m s used for frequency
measurement
Ratio of unknown
to standard
1/2:1
1:1
1-1/2:1
6:1
2 9
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