[BC] Real cases of IBOC interference wanted for research purposes

[David L. Hershberger]

Hi Doug,

I have two AM cases to report. First, KXNT 840 in Las Vegas apparently
sometimes "forgets" to turn off their IBOC at night. When this happens it is
usually on weekends. This trashes our adjacent local 5 kW AM station at
night (KCNO 830). Here are examples recorded two years ago:

http://www.w9gr.com/knco.mp3  (normal reception, no IBOC)

http://www.w9gr.com/kncoiboc.mp3  (IBOC on from Las Vegas)

Details of antenna patterns, my receive location, etc. are in my comments on
the FCC web page.

The second case is daytime interference. KCBC 770  in Riverbank (Modesto)
trashes KKOH 780 in Reno. My location is Nevada City, CA and I think I am
well within KKOH's protected contour. I don't have a recording of KKOH but I
could easily make one.

Dave Hershberger

----- Original Message ----- 
From: "Doug Vernier" <dvernier at V-soft.com>
To: <broadcast at radiolists.net>
Sent: Wednesday, July 19, 2006 8:30 AM
Subject: [BC] Real cases of IBOC interference wanted for research purposes


Colleagues,

We are looking for real cases of reported IBOC interference to analyze for
research purposes. Of particular interest is AM or FM IBOC interference to
analog stations within the normally protected contour of the affected
station.  We're also interested in interference outside the protected
contour however; unfortunately, there's not much that can be done about it.

You may respond via the Listserv or to my personal email dvernier at v-soft.com

Thank you.

Doug Vernier, Telecommunications Consultants
V-Soft Communications
Broadcast Propagation Software and Engineering Consulting
WWW.V-Soft.com - 319 266-8402
K0DV