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                      THE CGC COMMUNICATOR
                            CGC #621
                    Tuesday,  March 23, 2004
                             ________
               Robert F. Gonsett, W6VR, Publisher
                       <rgonsett@ieee.org>
           Stephen H. Blodgett, W7RNA, Letters Editor
                  mailto:steve@earthsignals.com
    Copyright 2004, Communications General® Corporation (CGC)
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  APPROVED: USE OF SEPARATE ANTENNAS TO INITIATE FM IBOC
  There is no known way to efficiently combine an analog FM
signal and a digital IBOC signal into a common transmitting
antenna.  For high powered operations, the lost power will be
significant.
  Now, the Commission has approved the use of two separate
antennas, one for analog and one for digital, provided that the
second (IBOC) antenna (a) is licensed as an auxiliary antenna,
(b) is within three seconds of latitude and longitude of the
main antenna, and (c) is between 70 and 100 percent of the height
above average terrain (HAAT) of the main antenna.  Other
restrictions apply as outlined in the URL below.
  For the time being, an application to use an auxiliary antenna
for IBOC purposes must be made via an STA request.
  http://hraunfoss.fcc.gov/edocs_public/attachmatch/DA-04-712A1.doc
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  DIGITAL COPY PROTECTION
  The first round of digital TV demodulators designed to
prevent the outright theft of TV shows have made their way
onto a list of "Certifications for Digital Output Protection
Technologies and Recording Methods to be Used in Covered
Demodulator Products."  Public comments are invited.
  http://hraunfoss.fcc.gov/edocs_public/attachmatch/DA-04-715A1.doc
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  FCC MULLING PLAN TO ACCELERATE DTV MIGRATION
  The FCC is reportedly considering a plan that could speed
the transition to digital television and free up analog spectrum
for use by others.  But an element of the proposal requiring
over-the-air viewers to pay to see programming they now receive
at no cost isn't likely to sit well with lawmakers or the viewing
public.
  http://www.usatoday.com/tech/news/2004-03-15-digitaltv_x.htm
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                      LOCAL & REGIONAL NEWS
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  OFFICIAL MEXICAN CALL SIGNS
  Word from an authoritative Mexico City source is that the
SCT-authorized call signs for the three new AM stations in the
vicinity of Tijuana are as follows:
  560 kHz:  XEKTT-AM (or XEPE, also said to be official)
  780 kHz:  XESS-AM
  920 kHz:  XESDD-AM
  Word from Tijuana is that the 920 kHz transmitter has been
moved into position and hooked up.  Once the missing diplexer
materializes or other arrangements are made, 920 kHz RF will
be coming our way.
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  MANY MEXICOS
  With all the Tijuana radio news, don't forget that XEMO(AM),
860 kHz, has reportedly moved its site and increased its power,
and that there is some controversy about those changes as well.
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                           JOB SHOPPE
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  BROADCAST ENGINEER NEEDED FOR A FOUR STATION CLUSTER IN PHOENIX
  For more information, visit:
  http://earthsignals.com/jobs/
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                      LETTERS TO THE EDITOR
 (100 Words or Less - Weekly Deadline is Wednesday, 6 PM Pacific)
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  SPAM TRAFFIC WORSENS ITS PREDICTED EMAIL CHOKE-HOLD (CGC #620)
  At this time, about 85% of the mail that I receive is spam,
amounting to over 5,800 spam messages each month.
  As of March 1, the spam filter I've been using had ranked over
387,000 words for spam likelihood.  With a few months of training,
the number of false positives has now dropped almost to zero.
False positives are a particular problem for businesses, since
even one means that someone must periodically review the entire
volume of "junk" mail to ensure that no "good" mail was
mis-identified as junk.  
  The number of false negatives seems to be trending upward, as
spammers use new tricks to outwit even the most effective filters.
Among their more common techniques are: 1) including a large
number of random "non-spam" words, so that the percentage of
"spam" words is very low, 2) encoding the whole message in
complex html or as an image, so that it becomes tricky to parse,
3) spoofing the sender's address so that it appears to come from
a valid and trusted address.
  Bob Weller, mailto:rweller@h-e.com
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                          MISCELLANEOUS
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  WIRELINE CARRIERS HIT BACK AT CELLULAR CARRIERS WITH WiMAX
  Just when mobile operators are finally getting their
costly third-generation (3G) networks up and running, a
disruptive wireless technology called WiMAX is about to really
mess things up.
  http://tinyurl.com/yw2ay
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           LOCAL ITEMS FROM THE FCC    (FCC TYPOS TOO)
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  FM TRANSLATOR APPLICATION FOR ORIGINAL CONSTRUCTION PERMIT
  ACCEPTED FOR FILING
  BNPFT-20030828ANS   NEW  139831   EDUCATIONAL MEDIA FOUNDATION
                E   92.7 MHZ                FONTANA, CA
  CP New Stn.
  Petitions to deny this application must be on file no later
  than 15 days from the date of the notice accepting this
  application for filing.
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  AM STATION APPLICATION FOR DIRECT MEASUREMENT
  ACCEPTED FOR FILING
  BZ-20040303ACP    KFWB  25457   INFINITY BROADCASTING EAST INC.
              P   980 KHZ                LOS ANGELES, CA
  Direct Measurement
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  AM STATION APPLICATION FOR MINOR AMENDMENT TO A CONSTRUCTION
  PERMIT AMENDMENT RECEIVED
  BMP-20040112ABE     KYPA  18273     MULTICULTURAL RADIO
                E   1230 KHZ      BROADCASTING LICENSEE, LLC
                                        LOS ANGELES, CA
  Engineering Amendment filed 03/12/2004
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  TV BOOSTER STATION APPLICATION FOR MINOR MODIFICATION TO A
  CONSTRUCTION PERMIT ACCEPTED FOR FILING
  BMPTTB-20040315AAH  KADY1  134300   BILTMORE BROADCASTING, LLC
                 E   CHAN-63               LOS ANGELES, CA
  Modification of construction permit file number
  BNPTTB-20010601AHA.
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  FM BOOSTER APPLICATION FOR LICENSE TO COVER GRANTED
  BLFTB-20040122ABR   KWVE-FM1  128509    CALVARY CHAPEL
                 E   107.9 MHZ          OF COSTA MESA, INC.
                                          SAN CLEMENTE, CA
  Lic. to cover
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  FM STATION APPLICATION FOR MINOR CHANGE TO A LICENSED FACILITY
  GRANTED
  BPH-20031106ACU     KXOL-FM  28848  KXOL LICENSING, INC.
               E     96.3 MHZ           LOS ANGELES, CA
  Minor change in licensed facilities Engineering Amendment
  filed 12/03/2003.  Granted 3/12/2004
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  TV TRANSLATOR OR LPTV STATION APPLICATION FOR ORIGINAL
  CONSTRUCTION PERMIT GRANTED
  BNPTTL-20000807AGO   K20HZ  125447    HOWARD MINTZ
                  E   CHAN-20          PALM SPRINGS, CA
  Construction permit for a new station for PALM SPRINGS, CA
  on channel 20, Effective Radiated Power 1.46, coordinates
  NL 33 deg 38 min 55 sec WL 116 deg 33 min 37 sec, as amended.
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  FM TRANSLATOR APPLICATION FOR MINOR AMENDMENT TO A
  CONSTRUCTION PERMIT AMENDMENT RECEIVED
  BNPFT-20030827AMM     NEW  156406     1400 INC.
                  E   94.3 MHZ          HEMET, CA
  Engineering Amendment filed 03/16/2004
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  LOW POWER FM APPLICATION FOR ORIGINAL CONSTRUCTION PERMIT
  OPPOSITION
  BNPL-20000605AIV   NEW  124400   SAN DIEGO COUNTY SER JOBS
              P   107.5 MHZ            FOR PROGRESS, INC.
                                          SAN DIEGO, CA
  Low Power FM CP New Stn.
  PETITION TO DENY FILED 2/27/04
  OPPOSITION TO PETITION TO DENY FILED 3/11/04
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  FM BOOSTER APPLICATION FOR LICENSE TO COVER GRANTED
  BLFTB-20040203ACE   KMRO-FM1  81502     THE ASSOCIATION FOR
                  E   90.3 MHZ         COMMUNITY EDUCATION, INC.
                                             CAMARILLO, CA
   Lic. to cover
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  FM STATION APPLICATION FOR LICENSE TO COVER ACCEPTED FOR FILING
  BLH-20040316AFH   KRCV  19088   UNIVISION RADIO LICENSE CORP...
              E   98.3 MHZ              WEST COVINA, CA 
  Lic. to cover
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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.
  Short news items are always welcome from our readers,
  and letters may be edited for brevity and clarity.  Letters
  to the Editor (Job Shoppe included) should be sent to
  mailto:steve@earthsignals.com.  For subscription and change
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  CGC Communicator articles may be reproduced in any form
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  Communicator and the originating authors, when named.  Past
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  courtesy of Bext Corporation.  
  The views expressed in our newsletters do not necessarily
  reflect those of Communications General® Corporation, Bext,
  or the newsletter editors.
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