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