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[RFI] RFI levels

To: <rfi@contesting.com>
Subject: [RFI] RFI levels
From: Hare,Ed, W1RFI" <w1rfi@arrl.org (Hare,Ed, W1RFI)
Date: Thu, 1 Mar 2001 07:27:27 -0500
I wrote:

> When I get back to the office tomorrow, I will post some 
> additional info from the NTIA IONCAP/WINDOWS program (along
> with the URL to download it.)

The levels for man made noise that are cited in the program are:

-110.4 dBm - industrial
-114.7 dBm - residential
-120.0 dBm - rural
-133.6 dBm - remote

This presumably assumes an isotropic radiator.  I am guessing this is a 3
kHz bandwidth.  The data caem from CCIR Report 258. The measurements made by
ARRL showed somewhat lower levels.

The program has to be just about the best IONCAP-based propagation program I
have played with.  It can be downloaded free from:

http://elbert.its.bldrdoc.gov/hf.html

73,
Ed Hare, W1RFI
ARRL Lab

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