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                     THE CGC COMMUNICATOR
                           CGC #1004
                    Monday, March 29, 2010
                            ________
               Robert F. Gonsett, W6VR, Editor
               <cgc (at) cgc333.connectnet.com>
   Copyright 2010, Communications General® Corporation (CGC)
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  FCC CHAIRMAN GENACHOWSKI TO SPEAK AT NAB SHOW
  Fresh from declaring that he wants more than a third of
the TV spectrum by 2015, FCC Chairman Julius Genachowski has
agreed to give a keynote speech at the NAB Show in Las Vegas.
The chairman will speak Tuesday, April 13, at 9 AM.
  http://tinyurl.com/ChairmanSpeaks
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  FCC NEWS BRIEFS
  o  Wilmington tests WiFi in White Spaces:
  http://www.televisionbroadcast.com/article/95214
  o  Regarding land-mobile/wireless: Amendment to Part 90
  of the Commission's Rules:
  http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-10-36A1.doc
  o  FCC releases consumer tools: Broadband Test and Broadband
  Dead Zone Report:
  http://hraunfoss.fcc.gov/edocs_public/attachmatch/DOC-296810A1.doc
  o  Beta version of FCC's Spectrum Dashboard released:
  http://hraunfoss.fcc.gov/edocs_public/attachmatch/DOC-296942A1.doc
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  APPLICANTS FOR NEW ANALOG LPTV AND TV TRANSLATOR STATIONS
  MUST AMEND TO DIGITAL BY MAY 24, 2010
  In furtherance of the DTV transition, the Media Bureau
announces that applicants for new analog low power television
and TV translator stations must submit an amendment to their
pending applications by May 24, 2010 to specify digital operations.
  Pending applications for new analog facilities that are
not amended to specify digital operations by the deadline will
not be processed.
  http://hraunfoss.fcc.gov/edocs_public/attachmatch/DA-10-496A1.doc
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  FCC ENFORCEMENT WATCH -- REGIONAL ITEMS OF INTEREST
  o  CommUSA busted by the FCC for 450 MHz interference to San
  Diego's Metro Traffic.  For the case history, see the "Feature
  Story" at the second URL:
  http://www.fcc.gov/eb/FieldNotices/2003/DOC-296708A1.html
  http://www.bext.com/_CGC/2010/cgc998.htm
  o  Telecom, Inc., Oxnard, cited for allegedly programming
  Rio School District transmitters on a 462 MHz frequency not
  authorized:
  http://www.fcc.gov/eb/FieldNotices/2003/DOC-296578A1.html
  o  Independent Taxi Owners Assoc., Los Angeles, issued an NOV
  for transmitting a digitally modulated signal on 461.925 MHz
  without breaks for several hours.  This precluded other
  authorized users from sharing the channel:
  http://www.fcc.gov/eb/FieldNotices/2003/DOC-296714A1.html
  o  Phoenix Ranch Market busted for 462 MHz operation without
  a license:
  http://www.fcc.gov/eb/FieldNotices/2003/DOC-296598A1.html
  o  Sony Pictures, Culver City, issued a NOUO for installing
  a cellular-band signal enhancer (BDA) without authority and
  creating 1.8 GHz interference to T-Mobile:
  http://www.fcc.gov/eb/FieldNotices/2003/DOC-297008A1.html
  o  Terra Exploration cited for causing interference in the
  806-821 MHz cellular band.  The RFI was traced to "engine
  spark plugs of Terra's oil wells" -- a most unusual case.
  http://www.fcc.gov/eb/FieldNotices/2003/DOC-296990A1.html
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                          REGIONAL NEWS
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  ABOUT THE OLD MT. WILSON TOLL ROAD
  Most engineers think of Red Box Road as the only way in
and out of Mt. Wilson.  But what about the old Mt. Wilson Toll
Road?  Now, Chuck Rozner of KTTV/KCOP, who is also with the
Sheriff's rescue team in Altadena, tells us more about this
little known trail.  His letter is the last posting on the
main page of Tech Letters:
  http://www.earthsignals.com/press/
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  FM HD RADIO EXCITER OPERATING IN DATA FAILURE MODE
  A few times each year, CGC discovers unusual signals in
the so. California broadcast bands (in addition to our work
with interference in the public safety bands).  The following
spectrogram shows an FM HD Radio transmitter emitting some
very unusual signals.
  The transmitter in question is located in the Inland Empire.
The equipment responsible for this spectral display is a FlexStar
exciter.  If further information is needed, contact Rick Hunt:
  rhunt (at) entravision.com
  or (213) 216-1171 (cell)
  http://earthsignals.com/add_CGC/FourCarriers.doc
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                          NATIONAL NEWS
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  FM STATION CRANKS UP HD POWER, CLOBBERS ANOTHER STATION
  An FM station on 97.9 MHz recently cranked up its HD power
level.  Even though the work was done in consultation with the
transmitter manufacturer, significant interference to a second
adjacent channel analog station resulted.  See the spectrogram at
the URL below.  The 97.9 MHz station is centered in the picture.
  The spectrogram was made in the vicinity of the 97.9 MHz
station using a directional antenna pointed right at the station.
A band pass cavity filter resonated at about 97.9 MHz was used
between the receiving antenna and the spectrum analyzer, hence
the lopsided HD Radio sidebands on the 96.9 and 98.7 MHz stations
that are also displayed.
  The important feature of this spectrogram is the wideband
noise coming from the 97.9 MHz station -- see the squiggly lines
starting about 0.3 MHz (1 division) to either side of the 97.9 MHz
station.  This is the noise that clobbered the second adjacent
channel analog station (not visible) mentioned earlier.  That
station had served at least a portion of a major metropolitan
area until the noise appeared.
  Low-level HD/analog combining is used at the 97.9 MHz station,
and we understand that a deteriorated PA tube led to the noise
shown.  We also understand that the transmitter manufacturer
is finding significantly less-than-expected life from these
particular PA tubes, meaning that the splatter problem documented
here could occur in other markets across the U.S. -- particularly
because routine spectral proofs are NOT required at FM broadcast
stations using HD (a rule requiring periodic proofs is needed).
  During the initial HD setup at the culprit station, the
spectrum reportedly looked good.  (Bob Gonsett & Steve Blodgett
contributed to this story.)
  http://earthsignals.com/add_CGC/IBOC20100306.pdf
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  EVEN PROPERLY OPERATING FM HD WILL INTERFERE WITH ANALOG
  Here is NPR's IBOC Coverage & Compatibility Study from
November 2009.  It shows how FM HD signals create interference
to legacy analog stations -- something the Commission ignored
when granting the recent HD power increases.
  For FM broadcasters, this is one good paper to review before
attending the NAB Show -- and before deciding whether to crank
up your HD power.  Why rush to deteriorate analog reception?
  http://www.nprlabs.org/publications/reports/20091218AICCSreport.pdf
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  HAM RADIO NOTE
  The FCC has issued a Notice of Proposed Rule Making to
allow Amateur Radio communications by EMPLOYEES of public safety
agencies and other entities, such as hospitals, for drills and
tests in preparation for emergency situations.  The operators
would of course have to be licensed hams and certain restrictions
would apply.
  http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-10-45A1.doc
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                           RANDOM NOTES
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  NEWS BRIEFS
  o  LPFM third adjacent channel legislation status:
  http://www.rwonline.com/article/96938
  o  "Electromagnetic sensitivity" lawsuit, unbelievable
  but true:
  http://tinyurl.com/LovejoyLawsuit
  o Electronic book archive:
  http://www.tubebooks.org/technical_books_online.htm
  o  Your Smartphone may be spying on you (story appears after
  an advertisement):
  http://tvtechnology.com/article/95418
  o  On baking audio tapes:
  http://en.wikipedia.org/wiki/Tape_baking
  o  Whatever Happened to Shortwave Radio?
  http://www.rwonline.com/article/95976
  o  Small amateur earth station listens to the Mars Express
  spacecraft over 60 million miles from Earth:
  http://webservices.esa.int/blog/post/7/1058
  o Gene Chenault dies at 90:
  http://www.radioink.com/Article.asp?id=1713355&spid=24698
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  TECH NOTES NEEDS LETTERS
  The Web-based publication created to accept Letters to
the Editor of the CGC Communicator needs input.  Please post
your thoughts about local and regional broadcast tech issues
here:
  http://www.earthsignals.com/press/
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                           OFF TOPIC
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  GRADE A OFF TOPIC MATERIAL
  o  This is reportedly the first 35mm motion picture film ever
  made:  A trolly ride through San Francisco just days before the
  1906 earthquake.  Un-scripted and thoroughly delightful:
  http://www.youtube.com/watch_popup?v=NINOxRxze9k
  o  Landing at night on a wildly pitching aircraft carrier is
  incredibly tough.  Two videos.  TWO, don't forget.  And hang on:
  http://www.youtube.com/watch_popup?v=4gGMI8d3vLs
  http://www.youtube.com/watch_popup?v=S0yj70QbBzg
  o  Live video & audio from The Owl Box in San Marcos.
  Five viable eggs were laid but only four have hatched so far.
  The owner of the box anticipates that the last owlet will
  emerge on or about Wednesday this week:
  http://www.ustream.tv/theowlbox
  o  Your next vacation (Antarctica) is ready and waiting.
  Crank up the sound and start the slide show:
  http://tinyurl.com/ykpf6wg
  o  Your personal jetpack:
  http://tinyurl.com/JetPacque
  o  Antenna ice at the Avalon Peninsula in Newfoundland.
  Photo courtesy of Paul Sautter, W6SJL, who adds, "This severe
  of a storm happens about once every 25-30 years:"
  http://earthsignals.com/add_CGC/Images/DSCF1084.jpg
  o  Cool link for Milky Way images (HD viewing is best):
  http://www.youtube.com/watch?v=0Z3cVQcfb-w&NR=1
  o  Outstanding military photographs:
  http://www.tom-phillips.info/images/cool.pics.military.htm
  http://www.tom-phillips.info/images/cool.pics.military.2.htm
  http://www.tom-phillips.info/images/cool.pics.military.3.htm
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                LOCAL FCC APPLICATIONS & ACTIONS
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  APPLICATIONS & ACTIONS -- WATCH FOR A SEPARATE NEWSLETTER
  Our routine listing of local FCC Applications & Actions
will be published in a separate newsletter very soon.  Watch
your mailbox for another Communicator.
  As usual, the list of Applications & Actions is hand-compiled
from a variety of sources to bring you the most up-to-date info
available.
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  The CGC Communicator is published for broadcast engineering
  professionals in so. California by Communications General®
  Corporation (CGC), consulting radio engineers, Fallbrook, CA.
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  Typographical errors originating in FCC material are
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