Showing posts with label VOA. Show all posts
Showing posts with label VOA. Show all posts

Wednesday, February 5, 2020

UPDATE: DRMNA EXCLUSIVE - Radio Marti on DRM!

Updates to the Radio Marti DRM broadcasting test:

Frequency is 7345 kHz from 1700-0200 UTC.

Reception reports today came in from Georgia, Florida, Washington, Dominican Republic, and Colombia.

Current testing has it in 64 QAM with Radio Marti on one audio service and VOA on another audio service. The bit rate for VOA is really low.

Depending on reception reports, they may drop to 16 QAM and only run one audio service. Using the xHE-AAC codec means some people cannot decode the audio, but it saves lots of bits! The Gospell and Avion receivers currently available should have no problem with audio decoding.

Brother Zyg also reports:

1. I am receiving the DRM transmission on 7345 kHz here in the Atlanta area even though my shortwave antenna was blown down very recently and is lying on the ground in several pieces!  The Screen ID shows two separate audio streams, Radio Marti and Voice of America.

2. I cannot decode the audio because it is using the latest xHE mode and the Dream software does not have that capability.

3. The KiwiSDR web receivers do have the xHE decoders (DRM extension) and I have listened to the audio on several KiwiSDR receivers in the SE USA.   

Here are Zyg's hour by hour VOACAP plots:









[Gospell display photo from @SWWINB]


Sunday, May 24, 2015

DRM developments at NASB 2015 in Washington DC


I have just returned from an excellent two days at NASB 2015 in Washington DC, hosted by RFA with on-site host Al "A.J." Janitschek

I was pleasantly surprised by the volume of DRM30 discussion this year. North American shortwave broadcasters are ready for DRM!




It was the 25th annual meeting of the NASB so Continental helped us celebrate with cake!

Specifically, there were three talks that featured DRM prominently. Below are just a few of the overall conference highlights:

Lauren Libby, President of TWR gave an impassioned plea for DRM receivers and for us to look to DRM for the future of international shortwave broadcasting. TWR trialed a DRM feature to Japan on KTWR Guam where they received a positive response from Japanese enthusiasts. 

On Friday, Cal Carter of Continental Electronics presented updates from the DRM consortium including the current status of the large scale Indian initiative as well as positive momentum in the Asia-Pacific region, Brazil and Southern Africa.







Of course, I took a crack at sharing the excitement by presenting my experience as a listener and logger. I enjoyed showing examples and playing audio from the user's perspective. I explained and demonstrated the strengths of DRM using Terje's DRM-Log Plotter software. My slides here and the audio clip here. I presented a reception time-capsule video at NASB 2014 which you can view here. Thanks to Terje for the great DRM-Log Plotter handout.

Here is a music sample from RNZI, recorded via DRM at my home in Oregon. That is about 7000 miles from their 25kW transmitter and received on my Newstar DR111 using an alligator clip-lead to a basement drain pipe as an antenna. Isn't DRM amazing?

We were very fortunate to have Jerome Hirigoyen in attendance from TDF. Their site in Issoudun, France currently has 2 high-power DRM transmitters in operation.
Dr. Kim Andrew Elliott presented VOA Radiogram and encouraged broadcasters to participate in the Radiogram initiative. VOA Radiogram is a weekly program whereby textual news with images can be transmitted on traditional, unmodified shortwave transmitters and likewise received using off-the-shelf, unmodified shortwave radios.

Gerhard Straub from IBB gave a worldwide update about their broadcast sites. Gerhard also indicated there will be an RFP out soon to develop an end-user app for decoding VOA Radiogram on smartphones and tablets. More info to follow on this exciting development!





During the NASB business meeting, the conversation got very interesting. A significant number of the broadcaster members showed interest in using DRM (sooner rather than later) and working together to make affordable receivers (USD 50 or under) available. This conversation was augmented by audience members including Ludo Maes from Broadcast Belgium and his extensive DRM knowledge. I was really excited to finally get to meet him, having enjoyed years of his work with TDP Radio and The Disco Palace on DRM.
I'm sure that attendees will agree, this was an enjoyable and informative gathering. For me the opportunity to "talk shop" with shortwave broadcasters and enthusiasts is unsurpassed. To those I met for the first time and for those I have known, it was my great pleasure to be in attendance.
As I flew home, I snapped this gorgeous view of Mt. Hood near Portland, Oregon. It was a perfect way to sum up my trip - "the sky is the limit" for DRM in North America. I would like to thank the NASB, RFA and all those in attendance for making this such a great conference. Special thanks go to Dr. Elliott for serving as my local host. It made my trip even better!

Monday, August 4, 2014

Bad news from BBG

It looks like the worst for VOA and affiliated US government shortwave broadcasting. Per their recent report, the listening situation is dire - further causing reductions to most of these services. In addition, the axe falls for BBG using DRM:

"Digital shortwave, or Digital Radio Mondiale (DRM), is unlikely to become an established mass media distribution methodology in enough of the BBG’s current or future markets to justify the costs."

I suggest you  save yourself time, by reading this brief synopsis, but if you are into self-harm here is the full report. I'm beginning to think that shortwave in general and DRM in particular need some strong medicine to be successful, and FAST!

As a side note, the report indicates that India is backing away from it "wholesale" conversion to DRM. India has been touted as the one case where DRM could really make a difference. Let's hope that the writers of this report are just plain wrong on that score, but I have no reason to question their understanding of the situation.
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Thursday, June 12, 2014

NASB 2014 write-up in the DRM Consortium Newsletter

More good press! Here is the article with additional photos in the June 2014 DRM Newsletter. To reiterate: I had a blast! Special thanks to Charlotte and all the good folks at the Consortium for gathering and disseminating news about DRM goings-on, worldwide!

Tuesday, May 20, 2014

Photo essay video of VOA Greenville (Site B) in anaglyph 3D

Here is a video of anaglyph stills taken 15 & 16 May 2014 during NASB Conference held at VOA Site B in Greenville, North Carolina. Get out those old Red/Cyan cardboard specs and enjoy!

Sunday, May 18, 2014

NASB 2014 recap for the digital enthusiast


Here is a brief recap of the NASB 2014 conference from the point of a DRM enthusiast.

On the first morning, standing in front of me in line for the van was a founding DRMNA member - Zyg from Georgia. It was so great to meet him in-person for the first time, having corresponded for nearly 10 years over DRMRX and DRMNA!  We had a fine time chatting throughout the conference.
After a 15 minute ride, we began to see what we came for -  the VOA antenna field...a sight/site to behold! It reminded me of seeing VOA Delano and KGEI in Redwood City, in my youth.
Turning from the highway onto the site, the situation became plain - this is an amazing antenna field. We continued past curtain after curtain of TCI antennas.





We then arrived at the Edward R. Murrow Transmitting Station. The building alone has that great cold-war look and with old glory flying high in the brisk North Carolina breeze.





We were dropped off at the steps and made our way into the facility. The building maintenance was impeccable and the staff were welcoming and charming. They offered us coffee and ushered us up to the conference room. After a brief introduction by VOA host Rick Williford and NASB president Brady Murray, came some words from Secretary Jeff White. We then headed back down and split into groups to tour the transitter plant and an antenna field that was not “hot” with an active broadcast. 
Macon Dail, Chief Engineer at the facility was our guide, and an excellent one at that. He is very knowledgeable and his willingness to take questions of all kinds, made everyone feel comfortable.
Standing under the immense antennas was a dream come true for me, and something I never thought would happen. 



As you might imagine, the "radio geek" in us all was obvious. Mark Allen of Rohn Towers and I couldn't get enough of the TCI curtains!






After several stops and standing under a variety of the antenna types in the field, we returned to the building to switch  to our tour of the transmitter facility. Macon walked us down the hall with the “authorized personnel only” sign and into the inner-sanctum of the station past walls of GE, Continental and various other transmitters. Macon noted several that were currently on-air. Unfortunately with the current governmental budget constraints, broadcast hours at the station have been significantly reduced. At the time, several programs for Cuba were on-air.  

We went into the central room were the master controls for the transmitters and antennas are monitored. It is a really neat place, reminiscent of the bridge of the Starship Enterprise!

Afterwards, we settled back into the conference room for our sessions. There was a great variety of topics, but I will only highlight the DRM and digital related sessions (of course this means I'm leaving out many excellent talks that didn't relate strictly to digital or DRM).

First up was Dr. Kim Andrew Elliott with an update on his work with VOA Radiogram. You might recall that yours truly is a proponent of this novel technique and has written several articles and opinions to that regard. He demonstrated the format live, including text and images. 

 


VOA has now transmitted the program for over a year with 100 or more listener responses weekly, from all corners of the globe. What remains remarkable is the quality of reception (chiefly using the MFSK32 mode) both inside and outside the intended target areas. Clearly, this service extends the reach of the existing transmitters, and does so without modifications or specialized receivers.

We also heard from a newer (lets call it "resurrected") station on shortwave - KVOH in California. In attendance were Rev. John Tayloe and Ray Robinson. They are interested in expanding their broadcasts with DRM in the future. Once again, their concern is the availability of receivers.


KTWR in Guam sent the very capable George Ross to talk about their exciting experiments with DRM. George had comments about what great success they are seeing in broadcasting DRM to Japan. Their listener response from there has been amazing. I really like what they are doing - transmitting quality music in stereo, to show off what DRM can do! 


Calvin Carter of Continental Electronics delivered the latest word from the DRM Consortium. DRM is beginning to make great strides in areas of Asia. Calvin had a slideshow, pointing out recent highlights - particularly regarding plans for India and information about new Indian made receivers, that should be available soon. These are in response to the AIR DRM receiver tender.


I presented the history of this blog, the DRMNA Yahoo Group and my experiences with DRM over the last ten years. I have you all to thank for our success. I was flattered and proud to be able to present about such an excellent group of enthusiasts.



[Christopher, George and Calvin - the "Three Musketeers of DRM" at NASB 2014]

There were a few things that would have made the conference perfect - well a few people perhaps... Particularly conspicuous by their absence were Brendan and Benn, to name a few. We missed you guys!

Overall, there were only a handful of us “strictly enthusiasts” in attendance. NASB would really like to have more of us in the future, and I can tell you that what we think and say does make a difference to them.

I believe that the listeners/hobbyists in attendance had as good of a time as the broadcasters themselves. Most of us ended the conference by going up to the transmitter site lookout tower, perched on top of the building. It gave us a 360 degree “birdseye view" of the entire property. What an amazing way to end our day! We all popped out the jalousie style windows and hung out the cameras, snapping pictures like madmen!

Above all, we got to see what great people are involved in the domestic shortwave industry. The VOA/IBB/BBG crew that hosted us were top-notch and I now understand the term “Southern Hospitality”. I was struck by their love and enthusiasm for the work they do. I offer my thanks to the NASB for this excellent conference!

and special thanks to Zyg for some of the photos above. I couldn't have told the story without you, buddy! 73





Friday, May 16, 2014

3D Fun at NASB on VOA site in Greenville NC

It has been a truly incredible two days! Not only have I met and spent time with some of the greatest folks in North American shortwave but I also had a grand tour of the fabulous Edward R. Murrow Transmitting Station.

Words can not express my excitement walking the antenna fields and touring all around inside this historic "National Treasure"! NASB members and VOA/IBB/BBG staff were all so very kind and hospitable to all in attendance.

For starters, I'm including a few 3D anaglyph photos (you know, the old cardboard framed red/blue glasses). Thanks to everyone that made this trip possible. It has been way more than I had hoped for. More photos and a conference run-down coming soon.


Monday, April 28, 2014

NASB in Greenville!

Your admin will be attending and presenting at this year's NASB conference in Greenville, NC (the home of the Edward R. Murrow transmitting station)! I will try to post from there (including stunning anaglyph 3D photos - hopefully) and would love to meet DRMNA readers, if you are attending.

This is going to be a great opportunity to hear from the North American shortwave community and to share ideas and experiences. If you are near the Washington DC area, please consider attending. I am really looking forward to this as my Springtime vacation!

Monday, January 20, 2014

Can we save VOA Delano from the wrecking ball?

Apologies to Miley Cyrus (ok, not really!) but VOA Delano is up for auction. I'm not entirely sure what is left in terms of hardware but there certainly are several big transmitters and quite a few antennas (not sure about their condition). Here is the property surplus notice found on this site.

In addition, here is an overview of the site from the recent past. Wow, wouldn't that be amazing, a West Coast powerhouse - all it would take are a few (hopefully) simple DRM upgrades!

Targeting Asia/Pacific, North-Central-South Americas, (perhaps good signals in Brazil?) this site would be truly unstoppable. I'm not sure to whom we should plead, but by all means, spread the word about this!

UPDATE: Here is a 2008 video on saving VOA Delano on YouTube. Lotsa great history here!

Thursday, March 14, 2013

“Soft launch” of VOA Radiogram this weekend

Here is the link to VOA Radiogram information for this weekend.

I've copied the text from the announcement here for your convenience:



"VOA Radiogram will “soft launch” this weekend. Here is the transmission schedule (all days and times are UTC):


Saturday 1600-1630 17860 kHz

Sunday 0230-0300 5745 kHz (Saturday evening in North America)

Sunday 1300-1330 6095 kHz

Sunday 1930-2000 15670 kHz


All via the IBB Edward R Murrow Transmitting Station in North Carolina.

The digital text modes to be transmitted this weekend on VOA Radiogram are as follows. Each text transmission will be one minute, unless otherwise specified. Asterisk * denotes RSID: if your RxID is on, Fldigi will automatically switch to this mode and audio frequency.