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Hi Peter,

sorry for the delay.

For measuring cable loss, you can use RL (return loss). You disconnect the cable at the antenna side and?leave the cable unterminated. The RL you measure is then twice the cable loss or

Cable Loss = 0.5 x RL

This is so because the forward wave and the reflected wave are attenuated. In a way it is like having twice the actual cable length :)

I hope this helps.

73
Dieter, VK3FFB