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27 February 2016, 2314 UTC, here in northern Virginia, CFRX Toronto is dominant on 6070 kHz, with Channel 292 in Germany, 10 kW, barely heard in the background. Nevertheless, this Channel 292 MFSK32 logo was decoded …
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DigiDX Olivia 64-2000 segment, 27 February 2016, 1719 UTC, 3985 kHz, via Radio 700 in Germany, mixing with strong local interference, as received by Merkouris in Greece. Decode this audio (center audio frequency is 1500 Hz) to see how Olivia 64-2000 can overcome interference.
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VOA Radiogram, 27-28 February 2016: Media news about China and Iran
Here is the lineup for VOA Radiogram, program 152, 27-28 February 2016, all in MFSK32 except where noted:
1:36 Program preview
2:45 China expands media controls*
11:07 Iran hardliners accuse BBC of interference*
15:42 Australia will increase defense spending*
21:35 Olivia 64-2000: Planned observatory in India
27:04 MFSK32: Closing announcementsPlease send reception reports to radiogram@voanews.com.
VOA Radiogram transmission schedule
(all days and times UTC):
Sat 0930-1000 5865 kHz
Sat 1600-1630 17580 kHz
Sun 0230-0300 5745 kHz
Sun 1930-2000 15670 kHz
All via the Edward R. Murrow transmitting station in North Carolina.The Mighty KBC will transmit a minute of MFSK32 Sunday at about 0220 UTC (Saturday 9:20 pm EST) on 6040 kHz, via Germany. Yes, I know this conflicts with the DigiDX transmission this weekend. We will try to harmonize the digital mode schedules in future weeks. Reports for KBC reception and decode to Eric: themightykbc (at) gmail.com .
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More MFSK32 on shortwave from DigiDX via Channel 292
DigiDX is a new service providing DX news in MFSK32 via Channel 292 in Germany, 6070 kHz, 10 kW. The DigiDX test transmissions last weekend were mostly successful despite China Radio International and other stations on the same frequency at various times.
DigiDX MFSK32 transmissions will resume this weekend via Channel 292, 6070 kHz. One will be Sunday at 0200 UTC (Saturday 9 pm EST), with possible reception in the Americas. The other will be Sunday at 1100 UTC. You might hear DigiDX MFSK32 transmissions at other times during the weekend on 6070 kHz, and possibly via Radio 700 on 3985 kHz. Consult the DigiDX Facebook page, https://www.facebook.com/digidx , and its Twitter account, https://twitter.com/Digi_DX .
Jari in Finland had a good decode of DigiDX despite a SINPO 55555 signal from China Radio International on the same 6070 kHz frequency …
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VOA Radiogram, 20-21 February 2016: Winter at the South Pole
Last weekend’s World Radio Day edition of VOA Radiogram was successful, based on the number of emails I received, and the response on Twitter. Even if you don’t have a Twitter account, you can see many of the decoded images at http://twitter.com/voaradiogram . If you are on Twitter, follow @voaradiogram for program reminders and retweets from listeners.
This weekend, we resume Olivia 64-2000 as our robust mode of the week. Most of the show will be in the usual MFSK32.
Here is the lineup for VOA Radiogram, program 151, 20-21 February 2016, all in MFSK32 except where noted:
1:35 Program preview
2:40 Remnants of atmosphere on exoplanet*
7:50 Olivia 64-2000: System stores renewable energy (image in MFSK32*)
15:42 Preparing for winter at the South Pole*
26:45 Closing announcements** with image
Please send reception reports to radiogram@voanews.com .
VOA Radiogram transmission schedule
(all days and times UTC):
Sat 0930-1000 5865 kHz
Sat 1600-1630 17580 kHz
Sun 0230-0300 5745 kHz
Sun 1930-2000 15670 kHz
All via the Edward R. Murrow transmitting station in North Carolina.The Mighty KBC will transmit a minute of MFSK32 Sunday at about 0220 UTC (Saturday 9:20 pm EST) on 6040 kHz, via Germany. Reports for KBC reception and/or decoding to Eric: themightykbc (at) gmail.com .
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VOA Radiogram, 13-14 February 2016: World Radio Day via shortwave radio
February 13 is World Radio Day. VOA Radiogram this weekend will include content pertaining to World Radio Day.
In addition to our usual MFSK32, one VOA News story will be in MFSK16. MFSK16 and MFSK32 are both 16-FSK, but MFSK16 is about half the speed and occupies about half the bandwidth (316 Hz). MFSK16 performed well in difficult reception conditions in past VOA Radiogram and Radio Australia broadcasts.
Here is the lineup for VOA Radiogram, program 150, 13-14 February 2016, all in MFSK32 except where noted:
1:35 Program preview (now)
2:55 MFSK16: Galaxies behind the Milky Way (MFSK32 image*)
9:43 SpaceX will attempt another launch later this month*
15:39 Da Vinci drawings converted to real objects*
21:34 World Radio Day*
26:57 Closing announcements** with image
Please send reception reports to radiogram@voanews.com
VOA Radiogram transmission schedule
(all days and times UTC):
Sat 0930-1000 5865 kHz (might still be audible in Europe via the gray line)
Sat 1600-1630 17580 kHz
Sun 0230-0300 5745 kHz
Sun 1930-2000 15670 kHz
All via the Edward R. Murrow transmitting station in North Carolina.The Mighty KBC will transmit a minute of MFSK32 Sunday at about 0220 UTC (Saturday 9:20 pm EST) on 6040 kHz, via Germany. Reports for KBC decodes to Eric: themightykbc@gmail.com .
Here is the World Radio Day logo as decoded last weekend by VOA Radiogram listeners around the world …
http://voaradiogram.net/post/139005577392/the-world-radio-day-logo-as-transmitted-on-voa
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The World Radio Day logo as transmitted on VOA Radiogram during the weekend of 6-7 February 2016, and received by shortwave listeners around the world. The fuzzy images were decoded in locations too far or too close to the North Carolina transmitter, given the time and frequency, or suffering from local interference. In most cases when the images are not clear, the accompanying text decodes without errors because of the error correction incorporated into the MFSK32 mode (see the image below). Shortwave, as well as medium wave and longwave transmitters, heretofore used only for voice and music, can now be used to transmit text and images successfully, even in reception conditions where the voice content may be difficult to understand. This capability could be useful when the Internet is not available for any reason.
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MFSK32, Olivia 64-2000, and MFSK8 versus RTTY interference
Bruno in Italy received VOA Radiogram on 31 January 2015, 0230-0300 UTC, on 5745 kHz. This transmission via North Carolina is directed to the Caribbean using a dipole antenna, so reception in Europe is usually less than brilliant.
An interesting challenge to the reception of this broadcast in Europe was the presence of an RTTY signal centered on 1000 Hz. The VOA Radiogram modes are centered on 1500 Hz.
MFSK32
In this Fldigi screenshot provided by Bruno, the RTTY and VOA Radiogram’s usual MFSK32 mode are seen side-by-side …
Despite the absence of direct interference by the RTTY signal, the MFSK32 still showed errors …
Welcome to program 148 of VOA deeo r Che Voice of Americr
™s® x Andrew Elliott in Washington.Here is the lineup for today’s prograotl¡ay qez×eept where noted.
1:35 Program preview (now)
2:56 Very wide solar system found*
7:25 i Sht)t e¥ctoVFÒe1sr13:56 Olivia 64-2000: New satellite tracks sea level
19:40 MFSK8: Same news item
24:44 MFSK32: Image, closing announcements, image** with image
Please send reception reports to radiogram@voanews.com.
An<STX>hestQlo nmunm 9
Olivia 64-2000,
In the Olivia 64-2000 portion of the VOA Radiogram program, the RTTY signal is within the 2000-Hz-wide trace of the Olivia mode …
The overlap of the RTTY may have caused the errors in the usually robust Olivia 64-2000 mode …
This is VOA Radiogram in Olivia 64-2000
Please send reception reports to radiogram@voanews.com
NASA Launches New Weather/Climate Satellite
VOA Scien3"/<ESC>rld Blog
22 January 2016An international oceanographic collaboration has a new tool to
help it monitor the rise in global sea level aMFhe successful
launch of a meteorological satellite.A Space X Falcon 9 rocket carrying the Jq<DC4>yl<DC2>, spacecraft blasted
off from Vandenberg Air Force base in California re<SO><DC4><FF><EM>.
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the spaceCraFt will help cnnTinue efforts to measure changes in
global ocean height by satellite that began in 1992 with the
Topex/Poseidon mission.MFSK8
In this screenshot of the MFSK8 portion of the show, the RTTY and MFSK8 are adjacent …
The MFSK8 was the most successful mode in Bruno’s reception, showing no errors. MFSK8 is slower than MFSK32, 30 vs. 120 wpm …
This is VOA Radiogram in MFSK8
Please send reception reports to radiogram@voanews.com
NASA Launches New Weather/Climate Satellite
VOA Science World Blog
22 January 2016An international oceanographic collaboration has a new tool to
help it monitor the rise in global sea level after the successful
launch of a meteorological satellite.A Space X Falcon 9 rocket carrying the Jason-3 spacecraft blasted
off from Vandenberg Air Force base in California recently.The spacecraft will help continue efforts to measure changes in
global ocean height by satellite that began in 1992 with the
Topex/Poseidon mission.The Jason 3 mission is a collaboration between NASA, the National
Oceanic and Atmospheric Administration, the French space agency,
CNES and the European Organization for the Exploitation of
Meteorological Satellites.bit.ly/1ORax9J
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VOA Radiogram as received in Sydney, NSW, Australia, 30 January 2015, 0948 UTC, 5865 kHz, via North Carolina transmitter. Modes are Olivia 64-2000 and MFSK8, each preceded by a 15-second tuning signal transmitted at 1500 Hz but received at 1384 and 1612 Hz (1612 seems to decode more successfully). Transmitter was AM, but receiver was set to USB. Some unsuccessful MFSK32 is included at the end of the recording.
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VOA Radiogram, 30-31 January 2016: Comparing slow modes MFSK8 and Olivia 64-2000
We will test slow modes again this weekend, so let’s hope for some bad reception. In addition to the Olivia 64-2000 that we have tried the past few weeks, we will transmit the same news item in MFSK8, which is slightly faster, about 30 words per minute. MFSK8 does require very precise tuning, so a 15-second tuning signal will be transmitted before the news content begins. The 15-second signal will also be transmitted before the Olivia 64-2000.
Here is the lineup for VOA Radiogram, program 148, 30-31 January 2016, all in MFSK32 except where noted …
1:35 Program preview (now)
2:56 Very wide solar system found*
7:25 ISIS radio in Afghanistan*
13:56 Olivia 64-2000: New satellite tracks sea level**
19:40 MFSK8: Same news item**
24:44 MFSK32: Image, closing announcements, image** with image
** preceded by 15-second tuning signal
Please send reception reports to radiogram@voanews.com.
VOA Radiogram transmission schedule
(all days and times UTC):
Sat 0930-1000 5865 kHz
Sat 1600-1630 17580 kHz
Sun 0230-0300 5745 kHz
Sun 1930-2000 15670 kHz
All via the Edward R. Murrow transmitting station in North Carolina.The Mighty KBC will transmit a minute of MFSK32 Sunday at about 0223 UTC (Saturday 9:23 pm EST) on 6040 kHz, via Germany. Reports for KBC reception to Eric: themightykbc (at) gmail.com .