Capacity

The capacitance of a cable is an important interference variable that limits the bandwidth of the cable and influences signal transmission. A high capacitance causes the line to act like a low-pass filter, whereby higher frequencies are attenuated more than lower frequencies.

If the input signal has a high capacitance, this means that the signal can change more slowly as the capacitance limits the current flow. This can lead to distortion of the signal and result in it no longer being recognised correctly by the receiver at the other end of the line. With high-frequency signals in particular, a high capacitance can lead to a reduction in transmission speed and a decrease in signal quality.

To minimise the effects of capacitance on signal transmission, various measures can be taken, such as the use of lower capacitance cables, the use of special cable configurations or the use of signal amplifiers or equalisation techniques to improve signal quality. It is important to consider the capacity of a line when planning and designing transmission systems to ensure reliable and error-free signal transmission.