3.1 length
Cable length in feet or meters to label and degrade the signal, audio and video(audio/video cable) signalsthrough long-distance cable, the impact on the final results reflect the lower signal to noise ratio, the decrease in brightness, image blur and synchronization adverse, these apparent the difference has become a contrast to the basis of the quality of the cable.
3.2 Frequency
Cable capacitance and wire material determines the scope of the transmitted signalfrequency in the appropriate transmission distance, if there is a fuzzy image, most of thecable did not meet the requirements of high frequency transmission, resulting in the lossof high frequency band of the signal.
3.3 interference
The cable is also a huge antenna, will absorb the space for the existence ofelectromagnetic waves. If the cable is not shielded or bad shielding effect of any type ofelectromagnetic interference would have a direct role in the useful signal, reducing thesignal to noise ratio
3.4 Temperature
The physical characteristics of the cable will be affected by the influence of ambient temperature, the physical parameters of the cable have different performance in differenttemperature ranges. Shelves in the walls, ceilings and equipment covered set, thecondition is not very satisfactory, easy to produce a higher temperature. Therefore, the choice of cable allows the use of the temperature range should be applicable to these environments.
3.5. Slope
The slope is describe UTP different length signal transmission time, depending on theUTP Stranded process and the stranded type, larger delay error, the need for cableslope compensation.

 
3.6 Impedance
Impedance is one of the important parameters to describe the technical specifications ofthe cable, the signal of the correct process to establish a baseline. The signal flow to maintain the entire system of power conversion.