Play Freebird said:
Very well-documented exhibits by Elliott Klein, KATY's consulting engineer. If you missed the link to the full petition (103 pages), its:
http://www.rbr.com/files.php?force&file=pdfs/KATY-FM-InterferencePet-052010.pdf
It will be interesting to watch how CBS responds. Apparently, the petitioner anticipates that the FCC (and the CBS lawyers) may cite the old
WKLX precedent in an attempt to disqualify all of the mobile recordings -- which, in this day and age, would make absolutely no sense. I mean -- isn't radio supposed to be the primary "vehicle" to reach people on the go? But knowing how the Commission has taken the easy way out in RITOIE cases, KATY may have a difficult time with this; I wish Willie Davis the best. The least they could do is refund his regulatory fees.
Another counter argument that wouldn't surprise me is the questionable claim that KATY's signal in the affected areas was
already unusable prior to KRTH's adoption of HD because of severe first-adjacent analog-to-analog interference. Fact is, today's FM receivers (especially those in vehicles) have much better selectivity than was typical in the 1940s when the adjacent channel protection ratios were defined. But the big problem with IBOC, as we all know, is that the digital signal is
not actually "on channel", so there's no way to eliminate the interference with improved IF filtering. The only practical solution (as KATY points out) is a reduction in ERP towards the interference area. Will CBS agree to this and install a directional digital antenna, or instead spend more money fighting with KATY?
Hi,
I'm the author of the KATY-FM pleading. Yes, in writing the pleading, I did anticipate the argument that mobile interference is not cognizable, due to the dynamic nature of received signal strength in the mobile environment. Although I generally prefer not to address arguments in anticipation that they might be raised, in this case, I felt it was better to address the issue head-on. I do believe that the
Forus case that I cited in the pleading is helpful, as it does show that the FCC policy not to consider complaints of mobile interference is not all encompassing.
As to whether the affected interference area was already being obliterated by interference caused by KRTH's analog signal, there is a very simple and straightforward way to determine this. Let's do some A/B tests, turning KRTH-HD on and off, and we'll all be able to see and hear what happens.
I have read the rest of this thread as it has developed so far, and I appreciate the words of support for All Pro. You might consider filing comments in support of the Petition with the FCC. Posts to this message board are all well and good, but filings with the FCC are even better.
The Exhibit C that was part of the filing package comprised an optical disc (CD-R) and a table listing the audio tracks on the CD-R. The list included the time, date, and place associated with each recording.
If you are interested in a version of Exhibit C that contains embedded .mp3-file versions of the same recordings, please contact me.... kd4vs at comcast.net. In the embedded-audio version, one can trigger playback of the recordings by clicking within the box containing the given track number.
I generated these mp3s to reduce the file sizes, so as to prevent the .pdf version of the embedded-audio Exhibit C from growing so large that I would be unable to send it through The Tubes.
I employed 128 kilobaud sampling in the conversion process. The .mp3 copies sound much like the .wav originals. However, I used the .wav originals to make the CDs in the original, extra copies, and service copy of the filing package,so that neither CBS nor the FCC staff could question the accuracy of the recordings presented. If I had used converted .mp3 files, someone might question whether the converted versions are sufficiently faithful to the originals.
I do have some feel for the technical issues involved in this case. I received a Bachelor's degree in Electrical Engineering before attending law school, and I was involved in college radio while pursuing my undergraduate degree. I've been a ham since I was a kid, and I love the smell of hot rosin flux in the morning....
With best regards,
John Joseph McVeigh
Butler, Maryland