NASB NEWSLETTER             www.shortwave.org

 

AUGUST 2003

                

 

IN THIS ISSUE:

Reports From the  2003  NASB  Annual Meeting

FCC Updates, Questions and Answers

IBB Report and Update

WRC-03

NASB  Representation at the  HFCC  Meetings

DRM Update-Technical and Marketing

TCI---A Dielectric Company

 

                                                     

 

These articles are summary reports of presentations at the  NASB  2003  Annual Meeting

 

 

FCC  Updates, Questions and Answers

 

Tom Lucey

FCC

 

In a recent  FCC  rule-making, the change from four broadcast seasons a year to two broadcast seasons a year for  FCC-licensed International Service was made official. The Commission’s Order will be put in the Federal Register any day now.  It will become effective 30 days after being put in the Federal Register.  The frequency/hour fee per season will not change, because that is set by Congress.  Effectively, the annual  fees for  HF  broadcasters are cut in half because of the official reduction of seasons from four to two.  This change will be in effect for the B-03 Season.

 

The next  HFCC meeting will be held in Norway the last week of August.  The deadline for submitting B-03 requirements to the  HFCC  is July 18.  The following  HFCC  meeting will take place in the United Arab Emirates the second week of February  2004.  Russia is slated to host the conference following that.

 

The  FCC has almost completed updating their  HF database to include the items that the  HFCC  requires.  The  FCC  would appreciate if all those broadcasters who can would submit their requirements in the  HFCC  format.  (Prior to his presentation, Tom distributed forms showing the  HFCC  format.)

 

The Notice of Inquiry regarding power line use for distribution of broadband carrier transmission will be going out soon.  See the  FCC  website.  There is concern that this mode may interfere with reception of shortwave.

 

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IBB  Report and Update  (Spectrum Management Division)

 

John Wood/Del Carson/Dan Ferguson/Bill Whitacre

 

John Wood gave an overview and report on the Spectrum Analysis program.  They’ve been heavily involved in preparations for  WRC-03, both for  USA  interests and for Inter-American interests (CITEL).  Recommendations were developed regarding additional allocations for broadcasting in the 4-10 MHz range.  Much monitoring and scheduling data was analyzed to arrive at a conclusion that around 250 kHz additional would adequately address co-channel collisions, and that around 850 kHz of additional frequency allocations would cover both co-channel and adjacent band collisions.

 

Del Carson of  IBB  Leasing reported that this year they have their highest leasing budget ever (approximately $13 million), largely due to the conflicts in Afghanistan and Iraq.  After the Iraq war, this will probably decline for budgetary reasons.  At present, IBB  is leasing about 150 hours per day on non-IBB facilities (about 90 hours for  RFA;  about 60 hours for VoA  and  RFE/RL).  Of the leased time, about 86% of it is shortwave.  The main trends Del sees in shortwave are privatization of facilities (many old state-run transmitters now in private hands), a lot more sharing of time on facilities (such as Merlin with VOA, for example), and consolidation (fewer stations overall).  The IBB uses satellite distribution mostly for program delivery to local outlets rather than for direct broadcasting.  There are not very many consumer satellite receivers at present.

 

Dan Ferguson of  IBB  Frequency Management told of adding three major services in the past year:  a 21-hour-per-day Persian service for Iran called Radio Farda, a Pashtu and Dari Afghan service that’s on shortwave 20 hours per day, and in March the Arabic Radio Sawa service was increased to 24 hours per day on shortwave.

 

Bill Whitacre of  IBB  Frequency Monitoring related that 60 Remote Monitoring System sites are active.  Additionally, they employ a major network of human monitors.  They’ve been doing some monitoring work for the  HFCC  verifying whether or not coordinated transmissions are in fact taking place.  This effort has turned up many “wooden transmitters”---cases where more frequency hours are coordinated than are actually used.  The  HFCC  makes contact with major offenders.  Resolving this problem is a process, not a one-shot effort.

                                                         

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WRC-03

 

Don Messer

IBB

 

The 2003 World Radiocommunication Conference will take place in Geneva, Switzerland, beginning on June 9 and ending on July 4.  Over forty agenda items are slated for consideration.  This presentation will address only the agenda items of concern to shortwave broadcasters.

 

The US delegation to WRC-03 is headed by Janice Obichowski.  Two US delegation committees with relevance to shortwave broadcasters are Working Group 4C and GT Plan 2.  Relevant items under consideration are the introduction of digital techniques into the HF bands, realignment of 7 MHz for the amateur service and other users, and more spectrum for HF broadcasting in the 4-10 MHz range.

 

The proposal regarding introduction of digital techniques is written to permit digital modulation in any of the bands allocated for shortwave broadcasting.

Any digital broadcasts must be coordinated through the  HFCC  and other committees the same as for analog transmissions.  The protection ratios developed out of the  DRM  tests show that  DRM  broadcasts must reduce the average power 7 db from what would have been used for an analog transmission on the same broadcast circuit.  There will be no restrictions recommended  on DSB or SSB modes of broadcasting in the proposal to permit introduction of digital techniques.

 

Regarding additional allocations for amateurs in the 7 MHz band, they desire 300 kHz of exclusive allocation for Regions 1, 2, and 3.  This would impact the broadcasting band allocations in Regions 1 and 3.  It has proven difficult to develop a unified proposal going into the conference, and it is very uncertain how this issue will fare at the  WRC-03.

 

The final agenda item of relevance to shortwave broadcasters is the proposal for additional spectrum allocation for  HF  broadcasting in the 4-10 MHz range.  At the time of this presentation, the US position was still being worked out.  One position proposes around 300 kHz of additional allocation, which should address only co-channel collisions.  Another position proposes around 800 kHz of additional broadcast allocations, to address both co-channel and adjacent channel collisions.  At the other end of the spectrum of positions, some propose no additional spectrum for broadcasting at all.

 

The  GT Plan 2 group is charged with proposing items that should be on the agenda for the  WRC-07 conference.  The 7 MHz and 4-10 MHz issues may get postponed to the 2007 conference.  The US position is to deal with those items at  WRC-03.

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NASB  Representation at the  HFCC  Meetings

 

Doug Garlinger

LeSea Broadcasting

 

Jeff White

Radio Miami International

 

This session was presented as a slide show,  so did not lend itself very well to a written report.  Doug and Jeff have already given comprehensive written reports on these conferences in past issues of the  NASB  Newsletter.

Doug attended the August 2002 meeting, held at the Landmark Hotel in Bangkok.  The US representatives included Tom Lucey (FCC), Doug Garlinger (LeSea), George Ross (TWR), and Dennis Dempsey (EWTN).  This was the first time that all three organizations, Asia-Pacific Broadcasting Union, Arab States Broadcasting Union, and the  HFCC, coordinated in a single global database.

Jeff attended the February 2003  HFCC meeting in Sandton, a suburb of Johannesburg.  The conference was hosted by Sentech, and held at the Sandton Hilton hotel.  For the first time, Radio Havana Cuba sent a representative to the conference.

For the complete written report on these two conferences, see the September  2002 and the February 2003  NASB  Newsletters at the  NASB  website.   

www.shortwave.org

 

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DRM Update---Technical and Marketing

 

Don Messer

IBB

 

One idea about a secondary application of  DRM  technology is to provide local service on the higher HF bands that don’t see a lot of use---21 and 26 MHz.  This could be accomplished using low power transmissions (500 w-1 kw), and would provide a service comparable to FM in quality.

 

Don gave recognition to Mike Adams for his efforts in arranging for test and demonstration of  DRM transmissions, and to Herb Jacobsen for his work in developing a  DRM  capable transmitter exciter.  About six types of  DRM  exciters are ready for marketing (shortwave and mediumwave).

 

Wide mediumwave usage of  DRM  is necessary if it is to find sufficient support for practical shortwave  application.

 

At  WRC-2003, around a dozen  DRM  transmissions at various frequency ranges will be broadcast into the Geneva area.  Several of the participating broadcasters have committed to continuing with  DRM  transmissions after this special demonstration period.

 

Receiver manufacturers expect to have consumer-type  DRM-capable receivers available by the end of 2004.  These receivers will be capable of working with other modes (eg. AM/FM), and may be customized to the market in which they will be distributed (i.e. models for Europe may differ in some regard for models intended for sub-Saharan Africa).

 

At this point, Don anticipates that making a  DRM-capable  receiver will increase the cost by about $50.00 above the cost of a comparable receiver without  DRM  capability.

 

Specifications and standards for implementing  DRM  technology are worked out, improved, and available.

 

Some  DRM  features are still being tested relating to channel width, with simulcast (both analogue and digital simultaneously) approaches, and with automatic selection of the best receive frequency (when multiple options are available).  Another aspect still under test is the application of  DRM  technique to single-frequency networks, such as are commonly already used in Europe for public broadcasting (to cover an entire country with a service using one frequency on multiple synchronized transmitters).

 

Don is pushing within the  DRM  group for the preparation of a “how to” manuel for broadcasters.  This would explain at a user’shortwave level how best to make application of  DRM  technology.

 

The  DRM  signal has much more energy, proportionally, near the edges of the occupied channel than does a double sideband transmission.  This raises the possibility for much more adjacent channel interference by a digital transmission as compared to an analogue transmission.  Tests and analytic work show that, for an adequate interference protection ratio, a digital signal must be operated at about 7 db less power level than would be appropriate if it were a regular analog  AM  transmission being used.  That this factor was not observed in the past on-the-air tests, and because some  DRM  test transmitters were not adjusted to comply with the  DRM-specified emission

mash”, resulted in many complaints by listeners of major interference (excessive occupied bandwidth), for some  DRM  test transmissions.

 

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TCI---A Dielectric Company

 

Ron Wilenski

 

TCI,  which became part of Dielectric in 2001, has supplied antennas to many of the  US  shortwave broadcasters.  Dielectric is the largest antenna supplier in the world.  They cover the frequency range from  MF to  UHF.  They install and service antennas, as well as manufacturing them.  Dielectric started out in 1942.  They have provided 70% of all the TV  transmitting antennas in the USA.

 

SPX,  a Fortune 500 company that began in 1911 as the “Standard Piston Ring Company,” acquired Dielectric in 1998.  Dielectric consists of five companies with about 800 employees:

 

     Dielectric  (antennas, transmission lines, switches, combiners/filters,  

     power splitters) 

 

     Brookstone Telecom  (cellsite construction, antenna and line installation,    

     microwave installation, base station installation, equipment rental)                       

    

 

     Central Tower  (manufactures and installs towers in the USA, provides 

     inspection and maintenance services)                                                                                                                                                                        

 

     Flash Technology  (aviation obstruction lighting systems, monitoring of

     tower sites for power outages and lighting outages, repair and

     preventative maintenance for tower sites)

 

     TCI  (largest supplier in the world of  HF and  MF  antenna systems)

 

TCI has done projects in 106 countries.  In fact, 80% of  TCI’s business is outside the USA.  By way of contrast, 90% of Dielectric’s business is inside the USA.  TCI sells much in the way of  HF  antenna systems, transmission lines, balanced line and coaxial switches, and baluns to shortwave broadcasters, the military, and to government entities.  TCI  has made over 60  MF  installations at the 600 kw level, and several dozen in the 1-2 megawatt range.

 

TCI also provides surveillance systems that acquire, listen to, and locate most kinds of wireless transmissions.  These systems find application in spectrum monitoring and management, and in government and military intelligence.

 

Dielectric features the world’s broadest antenna product line.  And they install what they sell.  They can design, fabricate, and install antenna systems.  Installation services range from technical consulting, to supervision of a local crew, to full turnkey jobs.

                                                      

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NASB  Members:                           

 

Adventist World Radio         

Assemblies of Yahweh

Family Stations Inc.

Far East Broadcasting Co.                                          

Fundamental Broadcasting Network

Herald Broadcasting Syndicate                                  

Le Sea Broadcasting Corp.                            

Radio Miami International

Trans World Radio

Two If By Sea Broadcasting Corp.

Word  Broadcasting

World Christian Broadcasting

World International Broadcasters

World Wide Catholic Radio


 

NASB Associate Members:

Comet North America

George Jacobs & Associates

HCJB World Radio                           

IBB                 

IDT Continental Electronics Corp

TCI/Dielectric

TDP

Thales Broadcast and Multimedia   

VT Merlin Communications

 

National Association of Shortwave Broadcasters

10400 NW 240th Street, Okeechobee, Florida  34972

Ph: (863) 763-0281  Fax:  (863) 763-8867    E-mail:  nasbmem@rocketmail.com