The estimated line attenuation (signal loss) on the DDS channel. Actual cable length can be estimated with the assumption that a good quality data grade cable is used. Use of lower quality cabling will produce greater line attenuation on shorter cable runs. (1) est. between 40 and 50dB line loss, equivalent to roughly 8 to 9 Kilometers of nominal cable length. (2) est. between 39 and 44dB line loss, equivalent to roughly 7 to 8 Kilometers of nominal cable length. (3) est. between 33 and 38dB line loss, equivalent to roughly 6 to 7 Kilometers of nominal cable length. (4) est. between 27 and 22dB line loss, equivalent to roughly 5 to 6 Kilometers of nominal cable length. (5) est. between 21 and 26dB line loss, equivalent to roughly 4 to 5 Kilometers of nominal cable length. (6) est. between 15 and 20dB line loss, equivalent to roughly 3 to 4 Kilometers of nominal cable length (7) est. between 8 and 14dB line loss, equivalent to roughly 2 to 3 Kilometers of nominal cable length (8) est. between 1 and 7dB line loss, equivalent to roughly .5 to 2 Kilometers of nominal cable length (9) est. 0dB line loss, equivalent to less than 1Km nominal cable length