S820E UG PN: 10580-00343 Rev. H B-5
Measurement Review B-2 Measurement Overview
The second common Line Sweeping measurement is Cable Loss (Figure B-5
on page B-6). This is a measure of signal output power compared to input
power. If output power is smaller than input power, then the loss comes from
heat and leakage. Cable manufacturers will specify the loss per foot or meter
at different frequencies and may call it attenuation. The Site Master has loss
specifications preinstalled for many cable types.
The Cable Loss measurement is typically a Pass/Fail measurement. It
requires a short or open at the cable end. This is a typical measurement
specified on new installations or main transmission line replacement, but it is
not typically tested on existing systems.
1. Failure at Jumper (1.22 m)
2. Possible Failure at 8.31 m
3. Example of Good Connector (~30 dB)
4. Precision Load Connected at End of Cable (24.65 m)
Figure B-4. Distance to Fault Measurement Shows Failing Components
Note Cable Loss cannot be measured with an antenna connected.
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