V. CABLE LOSS
Cable loss is the loss in signal strength (dBi) due to the length of your
antenna cable. Different types of Hi-Gain antenna cables have
different rates of cable loss. However, in all cases, the longer your
antenna cable is, the more signal strength (dBi) you will lose. This
table lists the specific antenna model, its cable type and the amount of
dBi lost per meter of cable:
As you can see from the chart, depending on the type of cable, there
is a varying range of cable loss per meter.
Measuring exact dB loss due to cable: (3.28 ft = 1 meter) Conversion rate
HAC10N is 10ft long. It has a cable loss of 0.26 dBi per meter.
Simple conversion shows that the use of this cable will result in:
10 ft (Cable length) / 3.28 (conversion rate) = 3.05 meters
3.05 meters x 0.26 (cable loss per meter) = 0.79 dBi
Therefore, when attached to an 9dBi Outdoor antenna, the actual
signal strength will be 6.32 dBi (Calculation: 9.0 - 0.79 = 8.21)
The HAC30N is a 30ft cable and would result in a cable loss of three
times the amount the HAC10N. (0.79 x 3 = 2.37 dBi cable loss)
When attached to the same 9dBi Outdoor Antenna the resulting actual
dBi is 6.63 dBi. This is a significant difference.
Please be sure to check the amount of cable you need and use the
shortest length possible to keep your signal strength at the highest
level.
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HOW DOES THE ANTENNA WORK?
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