BK Precision 4011A Instrukcje Operacyjne Pobierz pdf (Strona 67)

Appendix D: Operating Instructions for a Typical Oscilloscope

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Be warned that many presentations of Lissajous patterns report (X frequency) : (Y frequency),

which would be the inverse of the ratios shown here.

To measure frequency by Lissajous patterns, the unknown signal is applied to the vertical in-

put terminals. Then, a variable signal of known frequency is applied to the horizontal input.

The HORIZONTAL DISPLAY must be on external sensitivity. The known signal is varied until a

stable pattern is obtained, and the unknown frequency is calculated. The simplest way to do

this, however, is just to obtain a pattern in a 1:1 ratio. Then the unknown can be read directly

off the dial of the known source.

frequency

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BK Precision 4011A Instrukcje Operacyjne Strona 67