Bandwidth calculation example

Each component in the video reproduction chain (including cables) should have an upper frequency limit (-3dB point) higher than this value to avoid degrading the image . Exceeding the video bandwidth produces images look soft or smeared, or otherwise distorted.

The bandwidth of a signal is defined as the difference between the upper and lower frequencies of a signal generated. As seen from the above representation, Bandwidth (B) of the signal is equal to the difference between the higher or upper-frequency (fH) and the lower frequency (fL) .

The Bandwidth of video signals of decent quality is in the range of 4.2 MHZ .