| 摘要 |
The method lies in comparison of the measured voltage with the unknown mark-to-space ratio with the comparison voltage with the mark-to-space ratio of γ = 0.5 when the set elements on the viewing screen of the oscilloscope are shaped into targets where optical vibration is halted by the frequency shift whose size is the sought mark-to-space ratio according to the calibrated scale or special graph.<IMAGE>
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