# How can I calculate the total capacitance of a pair in this cable by using data-sheet?

Below depicts a 100m 3-pair STP cable, where my focus is the pair 1 on the top: simulate this circuit – Schematic created using CircuitLab

If I know the output impedance of the source Rs, and if I want to calculate the LP filter effect of the cable on the V1 signal; how can I calculate the total capacitance C1 for the Pair 1.

How can I calculate the total capacitance of the pair from the data-sheet like this one? Which parameters should be taken into account?

(Consider the signal frequency V1 is low like 100Hz(sinusoidal), I guess we can neglect the transmission line effects)

## 1 Answer

The capacitance is right in the datasheet: • We dont use capacitance unbalance? What is that one? Thanks – user1999 May 28 '18 at 6:46
• Secondly which parameter shows me to calculate total Rcable in my figure? I mean DC resistance per meter – user1999 May 28 '18 at 6:47
• @newage2000 look at the table and read it. – Andy aka May 28 '18 at 8:47