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![]() "Jeff Liebermann" wrote in message ... However, what was referring to was mismatch loss. Voltage_reflection off of a 75 ohm input: Vr = (50-75)/(50+75) = 0.2 Voltage transmission into 75 ohm input: T = 1 - (0.2^2) = 0.96 Converting to decibels, the loss will be: Mismatch_Loss = 20 Log 0.96 = -0.35 dB mismatch loss. Note that the mismatch loss is independent of the length of coax cable. I agree with what you have been saying. I may not be reading the part above the way you wrote it, but think I am. I am thinking that that .35 db loss due to the mismatch is in adition to the loss per unit length. That is if you have 100 feet of coax with a loss of say 3 db when matched, you will have a loss of 3.35 per 100 feet, and if you go to 200 feet you will have a loss of 6.70 db and not 6.35. |
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