## Answer 4.1

#### As the phase change is proportional to frequency, then the group delay response, which is the rate of change of phase with frequency, will be a constant. The value of group delay is given by:
Group delay (secs) = Phase error (rads/sec) / frequency spacing (rads)
Hence for the cable in question, the group delay is:
Group delay = (5 x 2 x 3.141 / 360) / (2 x 3.141 x1000000) = 13.9 ns