A.C. Coupled Distortion Example

  • Here we have the input signal a 5Vpp square wave which is D.C coupled. (i.e the Mode Selector has been set to the D.C. position).
  • As is expected the signal is not distorted in any way.
  • Here we have the same signal except it is A.C. coupled (i.e the Mode Selector is set to A.C. operation)
  • Due to the capacitor that is connected to the input when we use A.C. coupling, the signal has been distorted a great deal as can be seen here.

The Verdict

ALWAYS use the CRO with the Mode Selector set to D.C. unless an A.C. setting is absolutely necessary.

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15 September 2004