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  • Donor and distribution isolation

    Posted by juan-zuloaga on September 9, 2022 at 6:49 pm

    Just wondering if 0.5 inch donor riser and distribution riser can run vertically in the same conduit/shaft? How much separation do they need to achieve proper isolation? Is this even significant?

    Regards,

    Juan Z

    kwang replied 3 weeks, 6 days ago 3 Members · 2 Replies
  • 2 Replies
  • rick-angkham

    Member
    December 19, 2022 at 12:36 pm

    I don’t believe there is separation needed on coax. Isolation is needed with the donor antenna and the nearest server antenna to the donor. The only oscillation issue I’ve experienced is when the server antenna was below the donor and within 20-50ft. The remedy was to add a 6dB attenuator.

  • kwang

    Member
    January 4, 2023 at 10:29 am

    I agree with rick here. No physical separation needed between the donor and any riser cabling as long as it’s the same public safety DAS. Isolation is measured between the nearest serving antenna and the donor antenna.