Question

Calculate the return loss for a 30K feet / 24 AWG loop. Assume resistance of the loop is 900 ohms.

Answer 1

From standard table of Wire gauge standard vs Resistance,

Resistance/1000 feet of 24 AWG = 25

Therefore resistance of 30 kfeet / 24 AWG = 30 x 25 = 750

Loop resistance = 900

Reflection coefficeint at loop

Return loss in dB =

= -20 x (-1.0414)

= 20.828 dB [Ans]