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[RFI] Re: BPL interference with public safety

To: rfi@contesting.com
Subject: [RFI] Re: BPL interference with public safety
From: Tim Groat <tcgroat@earthlink.net>
Date: Sat, 17 Jul 2004 09:53:11 -0600
List-post: <mailto:rfi@contesting.com>
To cite a specific case, the California Highway Patrol uses VHF-Low band radios (around 45MHz). This band covers the remote mountain and desert areas using fewer fixed sites than would be needed for VHF-High band, UHF, or trunked systems. Longer wavelengths propagate better on diffraction-limited paths, which is what CHP must deal with outside of the major urban corridors. The need to communicate over difficult weak-signal paths is one reason they stay with this "old tech" system. This is spectrum where BPL systems operate, and where "legal" levels of interference can prevent critical communications.

--Tim (KR0U)

"Dave Bernstein" <dave.bernstein@comcast.net>:

Every public safety or law enforcement agencies rely on wireless communications, but most of this is VHF and above, which as I understand it is not threatened by BPL. It would be helpful to identify those agencies that rely significantly on HF frequencies; they should be candidates for special attention.


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