I'm having problems displaying two channels simultaneously on an oscilloscope when both probes are connected to measure voltages "across" the components.
To demonstrate the problem two resistors are connected in series and fed by a function generator. So the aim is to display the voltages "across" both of these resistors.
Okay so I first connect only one probe to one of the resistor's terminals as in the photo below(this photo is a bit blurry sorry):
My question is:
1-) Is my setup wrong? Is this a wrong way of displaying voltages across the components in an oscilloscope? (Is that because the probes have the same ground?) Or the oscilloscope is defect?
2-)How can I work around this issue? I was planning to see the phase difference in an AC circuit between a capacitor and a resistor for instance. For that I need voltages "across" their terminals not relative to circuit GND.
Note: I'm using a "Velleman HPG1 1MHz Pocket Function Generator" with 100Hz sine wave, and a Siglent 100MHz oscilloscope.
EDIT: Here is the basic schematics:
Each probe is connected in a way that their crocodiles and probe tips wired across resistor terminals as in my photos.