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Unformatted text preview: Series1 V N(p-p) V SIG(p-p) SCOPE'S (WRONG) V PK_PK MINIMUM MAXIMUM Fig. 1. Scope's wrong measurement of V PK-PK . To avoid having your measurement incorrectly affected by the noise amplitude, you need to manually place the voltage measurement cursors in the center of the noise "fuzz" as shown in Figure 2. This gives the correct peak-to-peak amplitude. Series1 CORRECT V PK_PK Fig. 2. Manually placing voltage cursors in center of "fuzz" for correct V PK-PK . (OVER) For example: with a 100mV peak-to-peak signal input to the scope, the "MEASURE" function gives an incorrect result of 112mV: This 12% error is worse than the combined effect of 5% resistor tolerances! Using cursors centered in the "fuzz" gives the correct reading of 100mV peak-to-peak:...
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- Spring '01
- Integrated Circuit