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Chris Esposito 2020-10-21 10:09:53 +11:00
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@ -129,7 +129,7 @@ Then type in the reference resistance used into the box.
As an example, if you are measuring the current through a circuit that you suspect draws 50mA from a 3.3V source, you can guesstimate its load resistance to be 66Ω (as per V=IR). 10% of this is 6.6Ω. To drop 50mV, you’ll need to use at least a 1Ω resistor. So the reference resistor you’ll need for this circuit should be in the range of 1Ω-6.6Ω Ohms. A 2.8Ω or 3.3Ω resistor will be ideal in this case.
### To measure resistance/capacitance:
Connect your load between Oscilloscope CH1 DC (Duplicate) and Oscilloscope CH2 DC (Duplicate). Connect Oscilloscope CH2 DC to Signal Gen CH2. Connect your reference resistor between Oscilloscope CH1 DC and GND.
Connect your load between Oscilloscope CH1 DC (Duplicate) and Oscilloscope CH2 DC (Duplicate). Connect Signal Gen CH2 to Oscilloscope CH1 DC. Connect your reference resistor between Oscilloscope CH2 DC and GND.
For resistance, you’ll want to aim for a reference resistor as close to the load resistance as possible. To be more accurate, you may want to take multiple measurements.