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Home > Support Center > Knowledgebase > Wireless Cellular Signal Repeaters > General Questions on Cellular Repeaters > When using a PowerMax wireless cell repeater, what is the maximum length of cable that can be run from the outside antenna to the repeater and from the inside antenna to the repeater?
     
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When using a PowerMax wireless cell repeater, what is the maximum length of cable that can be run from the outside antenna to the repeater and from the inside antenna to the repeater?
Solution

Any length of cable can be used as long as you take into consideration the signal attenuation (loss rated in dB) of the entire cable run. Determine your frequency and calculate the cable loss by using the cable loss chart below.

The total cable run loss from the repeater to the outside antenna should not exceed 10dB. The total cable run loss from the repeater to inside antenna should not exceed 5dB. The longer the cable run, the higher the grade of cable that should be used. Higher cable grades mean lower loss. Always minimize possible signal degradation by choosing a quality cable with 100% shielding. All Digital Antenna cable is double shielded, containing a 100% foil shield, high frequency dielectric and copper core.

When calculating total line loss, each connector adds a .5dB loss. For example, two type N connectors attached together equals 1dB loss.

Cable attenuation (loss) per 100':

  150 MHz 300 MHz 800 MHz 1900 MHz 2400 MHz Min. Bend
Radius
RG174  10.7dB 16.0dB 29.2dB 51.3dB 60.2dB 1"
RG58 4.7dB 7.0dB 12.7dB 22.0dB 25.8dB 2"
DA195 5.3dB 7.5dB 12.4dB 19.6dB 22.1dB 2"
RG-8X 4.0dB 5.4dB 10.2dB 20.6dB 24.9dB 2.5"
DA240 3.0dB 4.3dB 7.1dB 11.2dB 12.6dB 2"
RG-8U 2.4dB 3.5dB 6.4dB 11.2dB 13.2dB 4"
DA340 2.5dB 3.4dB 5.7dB 8.52dB 10.2dB 3"
DA440 1.5dB 2.2dB 3.7dB 5.8dB 6.6dB 4"

Article Details
Article ID: 15
Created On: 15 Oct 2006 01:23 PM