CGC #1126

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                        THE CGC COMMUNICATOR

                              CGC #1126

                       Monday, March 19, 2012

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                  Robert F. Gonsett, W6VR,  Editor
                  <cgc (at) cgc333.connectnet.com>

    Copyright 2012, Communications General® Corporation (CGC)

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  BREAKING THE LPFM AND FM TRANSLATOR LOGJAMS

  Watch for the FCC to address key LPFM and FM translator issues
at Wednesday's Open Meeting.  We could see the application logjam
thaw.

  http://tinyurl.com/LPFMs-vs-FM-Xlators

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  COMMUNICATION TOWERS ACCOUNT FOR RELATIVELY FEW BIRD KILLS

  A new exhaustive report confirms what we've heard many
times from knowledgeable people in our industry:  The percentage
of birds killed by communication towers is insignificant.  It is
particularly insignificant compared to the percentage of kills
made by cats and via bird collisions with buildings and windows.

  http://tinyurl.com/AvianMortality-RW  (Radio World synopsis)
  http://tinyurl.com/MigratoryBirds-FinalPEA  (FCC press release)
  http://tinyurl.com/The-Final-PEA  (The full-blown FCC release)

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  MORE LIGHTSQUARED

  Coming before the FCC (again) is LightSquared with a modified
technical proposal.  And if that fails, LS has hired premiere
litigators Theodore Olson and Eugene Scalia to launch a legal
battle with U.S. regulators.

  http://tinyurl.com/LightSquaredBackForMore
  http://tinyurl.com/LightLitigators

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  A POSSIBLE BENEFIT OF LIGHTSQUARED

  It could be that the FCC is considering mandating receiver
performance standards as a way of reducing interference and
improving spectral efficiency.  Perhaps it took someone with
the political clout of LightSquared to bring the issue of
receiver selectivity front and center.  The issue is long
overdue for serious consideration.

  Of course, improving receiver selectivity comes with a cost
to end users.  Better filtration costs money.  So that is a
delicate issue that is probably at the heart of this discussion.

  http://tinyurl.com/RX-Standards

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  FCC ENFORCEMENT WATCH -- SOUTHERN CALIFORNIA

  o  The FCC has entered into a Consent Decree with Uniradio
  Corp. concerning unauthorized cross-border program transmissions
  to XERCN, 1470 kHz, Tijuana, Mexico:
  http://tinyurl.com/XERCN-Consent-Decree

  o  Pacific Spanish Network has been fined $6,000 for
  transmitting on an unauthorized microwave frequency and at
  an unauthorized beam heading:
  http://transition.fcc.gov/eb/Orders/2012/DA-12-416A1.html

  o  Jeff Dineen, Fullerton, has been issued a Notice of
  Unlicensed Operation for transmissions on 1680 kHz:
  http://transition.fcc.gov/eb/FieldNotices/2003/DOC-312911A1.html

  o  Adelman Broadcasting (KRAJ, Johannesburg) was issued a
  Notice of Violation ("NOV") for EAS rule violations:
  http://transition.fcc.gov/eb/FieldNotices/2003/DOC-312908A1.html

  o  Fisher Wireless (La Cresenta) has been issued an NOV for
  transmitting non-stop pulses on 461.875 MHz which caused
  interference, and for transmitting the wrong call sign in
  Morse code:
  http://transition.fcc.gov/eb/FieldNotices/2003/DOC-312907A1.html

  o  KPAL-LP, Palmdale, was issued an Order to Show Cause
  why its Class A authorization should not be downgraded to
  low power television.  Similar Show Cause orders have been
  issued to others:
  http://hraunfoss.fcc.gov/edocs_public/attachmatch/DA-12-386A1.doc

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                           RANDOM NOTES
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  FREE DETAILED COVERAGE MAPPER FOR FM AND TV STATIONS

  A free on-line coverage mapping system has been developed
for FM radio, HD Radio, TV and Mobile TV courtesy of NPR Labs.
This looks like a major undertaking on the part of NPR.

  http://tinyurl.com/NPR-Coverage-Mapper  (Story)
  http://secure.nprlabs.org/radioTVmapping/  (The NPR mapper)

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  GENERAL NOTES OF INTEREST

  o  A first look at Engineering Sessions slated for the
  NAB Show in Las Vegas:
  http://radioworld.com/default.aspx?tabid=75&entryid=753

  o  408-foot tower to be added to One World Trade Center:
  http://tinyurl.com/TradeCenterTower

  o  John F.X. Browne passes away at age 75:
  http://tinyurl.com/JohnFXBrownPasses

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  KFI SLIPS OUT OF HD MODE

  KFI, 640 kHz, Los Angeles is one of the nation's best known
AM stations.  When that station hiccups, people notice.  Such was
the case just over a week ago when a report reached our office
indicating that KFI had slipped out of HD mode.

  On Tuesday, March 13, we took a spectrographic photo of
KFI and, sure enough, their HD sidebands were nowhere in sight.
The following spectrogram documents the situation and explains
what caused the anomaly.  Another interesting feature shown
in the spectrogram is the highly asymmetrical HD sideband
operation at KBRT.

  http://earthsignals.com/add_CGC/2012-03_KFI_HD.pdf

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  SPEAKING OF KFI

  Let's take a look at this venerable station's newly
installed transmitter plant in 1931.  The following write up,
from RCA Victor Company's "Broadcast News" newsletter of October
1931, takes us right inside the transmitter room.  By the way,
the same "handsome two story building of brick, steel and
concrete" (minus a little wear and tear) is still used as
KFI's transmitter plant today.

  The first URL takes you to the KFI story in Broadcast News
issue #1 (October 1931).  For more Broadcast News newsletters,
visit the second URL.

  http://tinyurl.com/KFI-TX-in-1931
  http://tinyurl.com/RadioHistoryIndex

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  SPEAKING OF KBRT

  Here are the FCC "history cards" for KBRT, 740 kHz, Avalon.
This is how the FCC kept track of major events before the advent
of computers.

  http://tinyurl.com/KBRT-History-Cards

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  MILITARY LANDING PRACTICE IN THE SANTA ANA MOUNTAINS

  The USDA Forest Service is proposing to allow the Marine
Corps. to continue rotary wing aircraft landings and takeoffs --
practice exercises -- at up to ten established sites in the Santa
Ana Mountains.  Written comments must be postmarked on or before
April 15, 2012.

  See the full proposal along with a map of the Landing Zones:

  http://earthsignals.com/add_CGC/USMC_Air.pdf

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                       THE MT. WILSON REPORT
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  THE MT. WILSON REPORT BY DENNIS DOTY

  The predicted 'biggest storm of the year' turned out to
be a bust on Mt. Wilson (the worst should be over by now).
In fact, I do not think a "storm" ever really happened.
We got an inch or two of snow at best.

  Dennis Doty
  dennisd (at) ladigitalnetworks.com
  March 18, 2012 @ 10:16 AM

  http://tinyurl.com/StormWarningCanceled

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                          HAM RADIO NOTES
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  SOLAR FLARES -- NOTHING NEW FOR AMATEUR RADIO OPERATORS

  People tend to get excited when solar flares are reported,
but flares are a natural part of the 11-year sunspot cycle and
are very familiar to Amateur Radio operators because flares
affect propagation.  The number of sunspots is increasing right
now, so expect more flares and more excited reports.

  Here is a video of a nice Northern Lights display caused
by the flare about a week ago.  The video starts with a black
screen.

  http://vimeo.com/38334272

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                       LETTERS TO THE EDITOR
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  TECH LETTERS

  Concerning the CGC Communicator story entitled "More on
Omnia's Improved FM Stereo Transmission System" (CGC #1125),
Mike Worrall says, "Something seems odd to me when listening
to/viewing the two samples of audio in the demonstration...."

  Mike's comments are posted and ready for viewing at:
  http://tinyurl.com/Mike-on-Omnia-FM-Stereo

  ______

  Letters to the Editor of the CGC Communicator should be
posted on the Tech Letters Website.  Here is the URL to make
new postings (all letters and comments are moderated and are
posted after review):

  http://www.earthsignals.com/press/

  Please contact the moderator, Steve Blodgett, if you are
having trouble viewing or posting: sblodgett (at) earthsignals.com

  Thanks!

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                            OFF TOPIC
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  HIGH STANDARD OFF TOPIC MATERIAL

  o  How differential gears work (video, advance to 1:50
  to skip unnecessary material):
  http://tinyurl.com/DifferentialGears

  o  A little tower climbing activity, hang on (back by
  popular demand):
  http://tinyurl.com/TowerClimbingActivity

  o  About half way through this stage performance a small
  bird lands on the lead singer's guitar.  Guaranteed to generate
  a smile:



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One thought on “CGC #1126

  1. (Via Email RE: “Lightsquared”)-SB)

    Subject: Re: CGC #1126
    From: Stuart
    Date: Tue, 20 Mar 2012 22:16:28 -0400 (EDT)

    A major factor regarding space based navigation (there are several, 2 fully operational) is that many different L band frequencies are involved. This means that the receivers must use wideband antennas, and front-ends to process very weak, spread-spectrum signals. GPS L1 the primary civilian carrier is centered on 1575.42 MHz and L2, used by the military (as well as some civilian users) is centered on 1227.60 MHz. There are a total of five operating or proposed frequencies ranging from 1176.45 to 1575.42 MHz in the GPS system.
    The operational Russian system, Glonass L1 is on 1602.0 with satellites using different frequencies. They plan to have at least five different frequencies in use. The European Galileo system will also be in L band on international satellite frequencies, once it’s fully running in two years with 30 satellites in orbit. Some current civil receivers can use two or more systems for greater accuracy.
    This block of L band has to be guarded from strong adjacent terrestrial signals, because the receivers have to be wideband. Unless Lightsquared and or the FCC can get around the physics of the problem, the adjacent bands should remain for satellite (weak) use only. Maybe we will all have to invest in cryogenic (super-cooled) filters to insure continued use.
    For more information, take a look at Wikipedia, starting with GPS.

    Stuart Landau
    K6YAZ

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