Anaxetus
Newbie level 5
Cable capacitance
What is it?
I´m using a cable to measure the impedance of a solution. There are about 5 cables and a shiled that is shorter than the cables. That is:
[instrument] [3m of Shielded cables ] [50cm of UNshielded cables] [Solution]
The cable is supposed to have 300pF capacitance. I don't understand that specification; capacitance relative to what? Between cables? Between Shiled and cables?. How can I measure it? (I have a scope and a sig. gen.)
The measurements are low freq (DC - 10KHz). Would it be troublesome to have a cable with such capacitance (300pF)?.
Is the capacitance of the cable important in designing low level measurements (1uV) instruments (in the BW specified above)? Why?
Of course, I don't expect a full answer here, just some basic guiding aspects and some links to free pdfs .
Best regards,
What is it?
I´m using a cable to measure the impedance of a solution. There are about 5 cables and a shiled that is shorter than the cables. That is:
[instrument] [3m of Shielded cables ] [50cm of UNshielded cables] [Solution]
The cable is supposed to have 300pF capacitance. I don't understand that specification; capacitance relative to what? Between cables? Between Shiled and cables?. How can I measure it? (I have a scope and a sig. gen.)
The measurements are low freq (DC - 10KHz). Would it be troublesome to have a cable with such capacitance (300pF)?.
Is the capacitance of the cable important in designing low level measurements (1uV) instruments (in the BW specified above)? Why?
Of course, I don't expect a full answer here, just some basic guiding aspects and some links to free pdfs .
Best regards,