Tag Archives: Digital Radio Mondiale

FCC’s AM digital order did not include DRM

This news item expands on our previous post.

(Source: Radio World)

No Luck for DRM in the AM Digital Order

Digital Radio Mondiale was hoping that the Federal Communications Commission would consider allowing its technology as an all-digital option for AM stations in the United States, along with HD Radio. But the FCC disappointed it.

[…]“Many commenters agree that all-digital AM broadcasting should be allowed but object to HD Radio as the sole authorized transmission technology,” it wrote.

“Specifically, commenters urge us to consider the Digital Radio Mondiale all-digital transmission technology on the grounds that it: (1) offers equal or better sound quality to HD Radio at lower bitrates; (2) can transmit metadata as well as emergency alerts, multicast subchannels, and a data channel; (3) is energy- and spectrum-efficient; (4) uses a superior audio codec; (5) is not susceptible to interference; (6) is not owned or controlled by a single company; and (7) has been used successfully in other countries and is the approved technology for shortwave broadcasting in the United States.”

But the FCC said the request was “beyond the scope of this proceeding.”

It said it needed to move expeditiously on this all-digital proposal; and that if parties believe that it should re-evaluate HD Radio and consider alternative technologies, “we would need to evaluate a fully developed proposal including data such as laboratory and field testing, similar to the petition for rulemaking that formed the basis of this proceeding.”[]

Click here to read the full article at Radio World.

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New DRM Transmission and DXer Programme from KTWR Guam

Many thanks to SWLing Post contributor, Ed, who writes:

SWLing Post readers might be interested in learning that KTWR in Guam
has announced new DRM transmission details including a new DXer’s
Program named “Love Asia By Radio” which is scheduled to first air on
October 25, 2020 on their 1026-1057UTC English DRM broadcast to India
on 13800kHz. I just posted a question on their blog asking if the
program audio will be made available online to potential listeners
who can’t receive the broadcast, but haven’t heard back from them
yet. If I do, I’ll share that info.

KTWR New DRM Transmission Details and DXer Programme

Effective from Sunday 25th October, KTWR, Guam will continue its DRM
broadcasts to India, China and Japan. It will include a brand new
programme produced specially for Dxers. Click here for more details.
http://ktwrdrm.blogspot.com/2020/10/new-dx-program.html

Love Asia By Radio

Guam Shortwave Transmitter Station – KTWR

Wednesday, October 21, 2020

New DX Program

People have asked us to air a DX program for many years. KTWR had
done this a few decades ago, but we had no one to produce a new
program. Now, one of our listeners, Arun Kumar Narasimham has begun
production of the “Dxers Diary”. The first airing will be on 25
October 2020 in our 1026-1057UTC English DRM broadcast to India on
13800kHz. We are glad that Arun has stepped in to fill this
longstanding gap in our programming. We hope you enjoy it and
continue to enjoy the DX hobby.

Thank you for the tip, Ed, and we’ll look forward to any updates you might have.

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Radio Waves: NAB and DRM Compete for US Digital, 1937 Radio School, iPhone over AM Radio, and “War of the Waves”

Radio Waves:  Stories Making Waves in the World of Radio

Because I keep my ear to the waves, as well as receive many tips from others who do the same, I find myself privy to radio-related stories that might interest SWLing Post readers.  To that end: Welcome to the SWLing Post’s Radio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!

Many thanks to SWLing Post contributors Alan, Paul, Bruce Hardie, Josh Shepherd, and Paul Evans for the following tips:


NAB, DRM Spar Over AM Digital for U.S. (Radio World)

Digital Radio Mondiale says its technology deserves to be tested in the United States

The Federal Communications Commission has been hearing from the National Association of Broadcasters and other interested parties about whether to allow AM band stations to turn on all-digital transmission, and under what parameters.

In addition to publicly filed comments, the NAB, which supports the idea, has made presentations to FCC staff about certain specifics — including whether the FCC should allow Digital Radio Mondiale to be tested in this country. NAB says it should not.[]

Remote learning isn’t new: Radio instruction in the 1937 polio epidemic (The Conversation)

A UNICEF survey found that 94% of countries implemented some form of remote learning when COVID-19 closed schools last spring, including in the United States.

This is not the first time education has been disrupted in the U.S. – nor the first time that educators have harnessed remote learning. In 1937, the Chicago school system used radio to teach children during a polio outbreak, demonstrating how technology can be used in a time of crisis.

[…]In 1937, a severe polio epidemic hit the U.S. At the time, this contagious virus had no cure, and it crippled or paralyzed some of those it infected. Across the country, playgrounds and pools closed, and children were banned from movie theaters and other public spaces. Chicago had a record 109 cases in August, prompting the Board of Health to postpone the start of school for three weeks.

This delay sparked the first large-scale “radio school” experiment through a highly innovative – though largely untested – program. Some 315,000 children in grades 3 through 8 continued their education at home, receiving lessons on the radio.

By the late 1930s, radio had become a popular source of news and entertainment. Over 80% of U.S. households owned at least one radio, though fewer were found in homes in the southern U.S., in rural areas and among people of color.

In Chicago, teachers collaborated with principals to create on-air lessons for each grade, with oversight from experts in each subject. Seven local radio stations donated air time. September 13 marked the first day of school.

Local papers printed class schedules each morning. Social studies and science classes were slated for Mondays, Wednesdays and Fridays; Tuesdays, Thursdays and Saturdays were devoted to English and math. The on-air school day began with announcements and gym. Classes were short – just 15 minutes – providing simple, broad questions and assigning homework.

The objective was to be “entertaining yet informative.” Curriculum planners incorporated an engaging commercial broadcasting style into the lessons. Two principals monitored each broadcast, providing feedback to teachers on content, articulation, vocabulary and general performance. When schools reopened, students would submit their work and take tests to show mastery of the material.

Sixteen teachers answered phone calls from parents at the school district’s central office. After the phone bank logged more than 1,000 calls on the first day, they brought five more teachers on board.[]

Listening to an iPhone with AM Radio (Hackaday)

Electronic devices can be surprisingly leaky, often spraying out information for anyone close by to receive. [Docter Cube] has found another such leak, this time with the speakers in iPhones. While repairing an old AM radio and listening to a podcast on his iPhone, he discovered that the radio was receiving audio the from his iPhone when tuned to 950-970kHz.

[Docter Cube] states that he was able to receive the audio signal up to 20 feet away. A number of people responded to the tweet with video and test results from different phones. It appears that iPhones 7 to 10 are affected, and there is at least one report for a Motorola Android phone. The amplifier circuit of the speaker appears to be the most likely culprit, with some reports saying that the volume setting had a big impact. With the short range the security risk should be minor, although we would be interested to see the results of testing with higher gain antennas. It is also likely that the emission levels still fall within FCC Part 15 limits.[]

“War of the Waves: Radio and Resistance during World War II.” (American Economic Journal: Applied Economics)

Abstract: We analyze the role of the media in coordinating and mobilizing insurgency against an authoritarian regime, in the context of the Nazi-fascist occupation of Italy during WWII. We study the effect of BBC radio on the intensity of internal resistance. By exploiting variations in monthly sunspot activity that affect the sky-wave propagation of BBC broadcasting toward Italy, we show that BBC radio had a strong impact on political violence. We provide further evidence to document that BBC radio played an important role in coordinating resistance activities but had no lasting role in motivating the population against the Nazi-fascist regime.

You can find a pre-print at: https://www.econstor.eu/bitstream/10419/202840/1/1016161859.pdf.


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New DRM portables announced at IBC 2020

Many thanks to SWLing Post contributor, Ed, who writes:

SWLing Post readers might be interested in reading the Digital Radio Mondiale Newsletter of September 2020, which covers DRM developments announced at IBC 2020.

These include DRM transmitter developments and deployments, and lots of new DRM receivers–such as eight (8) AM/FM/DRM portables, (1) AM/FM/SW/DRM portable, an automotive AM/FM/DRM model, a low-cost automotive AM/FM/SW/DRM model, and an AM/FM/SW/DRM development module with “High quality Tuner Frontend and Audio DAC” from Starwaves in Germany.

URL for newsletter: https://us10.admin.mailchimp.com/campaigns/show?id=5196729

URL for PDF describing new DRM receivers: https://www.drm.org/wp-content/uploads/2020/09/DRM-Receivers-@-Virtual-IBC-9-Sept-2020.pdf

Thank you for the tip, Ed!

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High-Frequency Parties asks FCC to question proposed Chicago DRM broadcaster’s true mission

Many thanks to SWLing Post contributor, Bennett Kobb, who shares an FCC Informal Objection he drafted and filed together with Kim Elliott and Christopher Rumbaugh.

Click here to download the Informal Objection. (PDF)

Radio World published a great summary of the filing today:

There’s a plan in the works to build a new international shortwave radio station in Illinois, one that would use the Digital Radio Mondiale modulation system. But now several prominent members of the U.S. shortwave community are asking the Federal Communications Commission to take a closer look first.

Parable Broadcasting Co. in April asked the FCC to allow it to build the station in Batavia, Ill., west of Chicago, using the call sign WPBC. It wants to offer “broadcasting and data services.”

Specifically, Parable wrote that the station would “serve the areas of Europe that may be authorized by the commission. The planned broadcast content includes religious and educational programming, as well as data content provided by third parties.” It added that it wants to “take advantage of the recent push by the National Association of Shortwave Broadcasters to develop and provide content for the growing DRM market.”

Now three individuals, collectively called the High-Frequency Parties, filed an informal objection. It’s that wording about data content that concerns them.

Bennett Z. Kobb, Kim Andrew Elliott and Christopher D. Rumbaugh said international broadcast stations in the U.S. are intended “to be received directly by the general public in foreign countries.”

Now they told the FCC that it is impossible to tell from the Parable application whether all of the data services and data provided by third parties will qualify. [Continue reading at Radio World…]

Bennett clarified with me:

The [FCC] rules require these [broadcasters] to be 100% broadcast stations, not a cover for some other kind of service.

Because there is no established radio service for international shortwave trading, some have used the workaround of calling them “experiments”. Quite a few such “experimental” stations have been licensed, some at rather high power levels.

See for example this article.

But legally, the Experimental Radio Service is supposed to be for temporary scientific purposes, not ongoing for-profit operations. We don’t know what those stations are really up to because the FCC has kept the details secret. All we know is some technical data such as callsigns, frequencies, QTH.

Instead of experimental stations, others wanting to get into the data business — including the Turms Tech station in New Jersey, and this Parable station in Batavia IL — seem to be using the work-around of the International Broadcast service. That is, proposing an audio programming station that uses the DRM data channel for trading messages.

We are not in the 1970s or 80s. There’s not enough money today in broadcasting audio to other countries, to justify the millions spent on real estate, engineering, antennas and transmitter plant. Most SW broadcasting around the world is not commercial. So it is very peculiar for new entrants to drop major bucks in this field.

The new guys are probably not getting in to spread the gospel. That is a surface paint. There are already several U.S. HF stations with religious content, as you know, including WTWW, WWCR, WRMI, WRNO, WINB, WWRB, WHRI, WBCQ, WJHR etc. and most would welcome new customers for airtime.

No need to construct new stations.

So what is this new station really? Get it out in the open and ask them how they intend to comply with the existing rules. If they are in the business of carrying secure messages for traders, that does not qualify and will need some special FCC action to allow it. Let the public see the reasoning.

The rules that exist are very old. We think FCC needs to do a top-to-bottom review of the HF broadcast rules and scrap a lot of it. FCC should permit stations to be built for U.S. domestic audiences, and they should reduce the minimum AM power (50 kW) to lower this barrier to
entry.

And they should perhaps consider how data communications could be formally authorized. Maybe it wouldn’t be just a broadcast service any more, it could be a HF Communications Service with the old restrictions on languages and advertising discarded and more opportunities for people to try out creative ideas.

So we’re pressing the issue that this needs to be examined. Thanks for reading.

Thank you for sharing this, Bennett! We hope your filing gets its due attention. I also agree on one of your final points, that the FCC lower its 50 kw AM power requirement of a shortwave station as it places a huge barrier in front of would-be shortwave broadcasters.

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Radio Waves: Radio Marti DRM, Push for Shepparton Museum, APRS on the History Channel, and Radio’s “Major Cultural Opportunity”

Radio Waves:  Stories Making Waves in the World of Radio

Because I keep my ear to the waves, as well as receive many tips from others who do the same, I find myself privy to radio-related stories that might interest SWLing Post readers.  To that end: Welcome to the SWLing Post’s Radio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!

Many thanks to SWLing Post contributors Alan Hughes, Michael Bird, Zack Schindler, and Dennis Dura for the following tips:


Radio Marti Begins Shortwave DRM Transmissions (Radio World)

Radio Marti began Digital Radio Mondiale (DRM) shortwave transmissions on Feb. 4. Part of the U.S. Agency for Global Media (USAGM), Radio Marti broadcasts news and other programs to Cuba. The DRM shortwave transmissions are from USAGM’s Greenville, North Carolina, site.

USAGM has transmitted in DRM before. There were some transmissions from Briech, Morocco, in the early 2000s. Greenville tested DRM in 2009 in partnership with what was then known as HCJB Global Technology. So why are they back now after an absence of over a decade?

“We want to experiment a bit with different modes and services available on DRM. We also want to help push the development of low-cost receivers and the best way to do that is to put some transmissions on the air, explains Gerhard Straub, director of USAGM’s Broadcast Technologies Division.[]

Push for museum at Shepparton’s Radio Australia site (Shepparton News)

Amateur radio enthusiasts are pushing for the former site of Radio Australia in Shepparton North to be upgraded and retained as a national museum of radio broadcast history.

Members of the Shepparton and District Amateur Radio Club and The Vintage Radio Club of North East Victoria are due to present a 25-page proposal to an anonymous consortium of buyers said to be interested in acquiring a 258ha block of land along Verney Rd.

The block includes two buildings and several large broadcast towers on the former site of Radio Australia. The site is currently owned by BAI Communications.

The Shepparton club’s assistant secretary, Geoff Angus, said the proposal would be presented to Greater Shepparton City Council for forwarding to the consortium.[]

APRS usage seen on the History Channel “Secret of Skinwalker Ranch”

Zack Schindler writes:

I have been watching a show about paranormal activity on the History Channel called The Secret of Skinwalker Ranch. In the episode this week they hired a professor to do a balloon launch with some RF sensors. In this episode they also showed the APRS.FI webpage and I was able to read his callsign from an APRS tracker, KM4MRH.

The professor used an APRS tracking device. On the right side of the page link below you can click on Other SSID’s to see other balloon launches he has done. Normally when there is a balloon launch you can see the data from it going up and down. This page shows the Skinwalker balloon launch data transposed over a map. https://aprs.fi/#!call=a%2FKM4MRH-3&timerange=3600&tail=3600

Sadly they are using these for measuring RF fields rather than these.

In a Crisis, Radio Should Be Bigger Than Ever — So Why Isn’t It? (Rolling Stone)

Terrestrial music stations have a major cultural opportunity right now, but employees say a muddied strategy is standing in the way

Radio personality Kevin Ryder was “baffled” by KROQ’s “cold, heartless attitude” when he and his morning-show team were fired at the end of March. The station has long been an alternative/rock staple in Los Angeles, the second-largest market in the country, and Ryder had been on the air for more than 30 years.

“The new people in charge now weren’t here for the building of the world-famous KROQ,” Ryder, one-half of the popular Kevin & Bean Show, said on air when the station let him go, live one final time. “I don’t think it means anything to them. It’s a numbers business, and there’s no family aspect to it anymore. It’s only numbers, but this place was built without numbers. It was musicians, artists, and the special relationship between music, the station, and our fans.”

AM/FM radio provides localized, round-the-clock information and entertainment via friendly neighborhood voices — so in theory, it’s the perfect platform in a global crisis that forces hundreds of millions of people to stay home. But Ryder is one of many in the radio community — including on-air hosts, music directors, program directors — who have been shocked by sudden job losses in recent weeks as COVID-19 has spread across the U.S., and news out of the industry has been one bad thing after another. Why is terrestrial radio missing the opportunity here — and how should it be fighting to get back on top?[]


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DRM featured on BBC Digital Planet

DRM broadcast (left) as seen via a KiwiSDR spectrum display.

Many thanks to SWLing Post contributor, Ed, who writes:

The April 14, 2020 edition of the BBC World Service program ‘Digital Planet’ includes a story about the status of Digital Radio Mondiale (DRM) broadcasts on shortwave. The segment had no breaking news, but SWLing Post readers might enjoy hearing an updated explanation on BBC of how DRM works on shortwave and other bands, where it’s being used, and what unique services it can offer. The segment includes a clip of digital audio played over shortwave and an interview with Ruxandra Obreja, Chair of the DRM Consortium and DRM Association.

The segment was followed by a casual conversation between BBC producer Gareth Mitchell M7GJM and interviewer Bill Thompson about SWLing and Amateur Radio–which was great to hear discussed on BBC World Service!

The entire segment and followup discussion begins at 21:17 and ends at 31:49 minutes into the mp3 recording found at this BBC URL:

Thank you for the tip, Ed! Digital Planet is a fantastic technology show–check out more episodes on their website.

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