www.rhci-online.net/radiogram/radiogram.htm
RSID: <<2013-11-30T16:01Z MFSK-16 @ 17860000+1500>>
Welcome to program 35 of VOA Radiogram from the Voice of America.
I'm Kim Andrew Elliott in Washington.
Here is the lineup for today's program:
1:37 MFSK16: Program preview (now, 3:01)
4:43 MFSK32: Slant test with 4 images (5:18)
10:03 MFSK32: Introduction to audio harmonic experiments (2:32)
12:33 MFSK64 1500Hz/1000Hz: Philippines radio (3:56)
16:27 MFSK64 1000Hz: W7VOA image (1:55)
18:24 MFSK32: Email address and intro to MFSK64L tests (:44)
19:08 MFSK64L 1500Hz/1000Hz: Ivanpah solar power station (5:30)
24:39 MFSK32: Image of Ivanpah facility (2:37)
27:13 MFSK32: Closing announcements (:32)
27:46 MFSK32: VOA Radiogram logo (:36)
Please send reception reports to radiogram@voanews.com
And visit voaradiogram.net
Twitter: @VOARadiogram
VOA Radiogram changes to MFSK32...
RSID: <<2013-11-30T16:04Z MFSK-32 @ 17860000+1500>>
In the previous program of VOA Radiogram, all listeners received
badly slanted MFSK images. This was because of a
yet-to-be-determined problem on the transmitting side.
Merkouris Gogos in Greece found the solution by using the Fldigi
setting that allows sampling rate corrections. I passed this
information on to VOA Radiogram listeners in an e-mail, and by
the end of the weekend, many of you were decoding unslanted
images.
Will the MFSK images be slanted this weekend? Let's begin the
program with a slant test.
First, in Fldigi, open this box: Configure > Sound Card >
Settings. Under Corrections, the RX ppm should be set to 0 (zero)
or whatever setting you use normally.
We will transmit a vertical blue line three times for a total of
2:15.
If the line appears vertical, no adjustments are necessary,
although you can experiment while the images are sent.
If the top of the line slants to the right, try an RX ppm of
-500, and click Save. Make futher adjustments as necessary.
If the top of the line slants to the left, try an RX ppm of 500
(+) and click Save. Make further adjustments as necessary
OK, let's see what happens. (This has never been attempted before
in shortwave broadcasting!) ...
Sending Pic:61x195C; |
Sending Pic:61x195C; |
Sending Pic:61x195C; |
1st run 0 ppm
|
2nd run 0 ppm
|
3rd run 0 ppm
|
-50 ppm |
-50 ppm |
-50 ppm |
Next on VOA Radiogram, a QR code. If there is no slant, it will
be square in shape, and all the lines should be either vertical
or horizontal...
Sending Pic:200x200;
|
|
|
Roger: |
If you record VOA Radiogram using the Audacity software, slant can be eliminated by using Effect > Change speed. A change of -1000 ppm in Fldigi equals -0.1% in this Audacity setting.
+-+-+-+-+-+-+-+-+-+-+-+-+-+ |V|O|A| |R|A|D|I|O|G|R|A|M| +-+-+-+-+-+-+-+-+-+-+-+-+-+
On VOA Radiogram, our experiments continue, but this time the experiments will involve text rather than images.
Many of you have noticed audio harmonics of the digital text modes. For example, the trace of MFSK32 centered on 1500 Hz is from about 1260 to 1720 Hz. The second harmonic will be 2520 to 3440 Hz, with the lower half of that visible at the right side of the Fldigi waterfall.
Today's experiment will try to determine if decode of the digital text modes is impeded if the second harmonic overlaps with the fundamental.
MFSK64 on VOA Radiogram is typically centered on 1500 Hz. As such, the fundamental is from about 1000 Hz to 2000 Hz, with the second harmonic from 2000 Hz to 4000 Hz. Hence, no overlap. But if the MFSK64 center frequency is moved to 1000 Hz, the fundamental of the MFSK64 is from 500 to 1500 Hz, with the second harmonic 1000 to 3000 Hz. Now we have overlap.
Next on VOA Radiogram, a VOA News story in MFSK64 centered on 1500 Hz. After that, the same VOA News story in MFSK64, centered on 1000 Hz, resulting in an overlapping second harmonic. Will the overlap affect the decode of the MFSK64 text? Stay tuned.
VOA Radiogram now changes to MFSK64 centered on 1500 Hz...
|
|
RSID: <<2013-11-30T16:12Z MFSK-64 @ 17860000+1500>>
|
RSID: <<2013-11-30T16:16Z MFSK-64 @ 17860000+1000>>
|
This is VOA Radiogram in MFSK64 centered on 1500 Hz...
Relief Radio Station Signals Dire State of Communications in Tacloban, Philippines
Steve Herman W7VOA November 23, 2013
TACLOBAN, PHILIPPINES - All of Tacloban's 15 radio stations were knocked off the air when Typhoon Haiyan devastated the Philippine city of 220,000 people. A response within 72 hours by volunteers managed to get an emergency station on the air - the only local mass means for the survivors there to get instant, reliable information.
"It is now 10:07. This is 98.7 FM, First Response Radio broadcasting live in Tacloban city." The voice of Magnolia Yrasuegui is filling a void. Around the clock, live and on tape, she and others are heard across the destroyed city informing residents on how and where to get help.
The portable station, part of an international non-profit network of radio technicians, is contained in a couple of suitcases that were stored in Manila.
An initial small 50-watt transmitter is being replaced by a more powerful 600-watt unit.
Even the weaker signal, though, could be heard for kilometers emanating from a small antenna erected on the roof of the damaged city hall.
Survivors are seeking accurate information about the fate of family members and their city, according to Yrasuegui. "Rumors have been flying out and they do not know anything about what happened to them, if their relatives are still there. So communication also is aid."
With no electricity service in the city and batteries a scarce commodity, volunteers from the station have distributed hundreds of solar and crank-up radios to people in evacuation centers.
They get to hear from in-studio guests such as Dr. Joji Tomioka of Japan's medical team for disaster relief, which is now treating patients in Tacloban.
The five volunteers staffing First Response Radio say they will remain on the air until this city can recover to the point that at least one of its radio stations can resume broadcasting.
http://www.voanews.com/content/relief-radio-station-signals-dire- state-of-communications-in-tacloban-philippines/1796148.html
Now the same VOA News story in MFSK, with the center frequency shifted to 1000 Hz.
VOA Radiogram continues in MFSK64 but shifts the center audio frequency to 1000 Hz...
|
This is VOA Radiogram in MFSK64 centered on 1000 Hz...
Relief Radio Station Signals Dire State of Communications in Tacloban, Philippines
Steve Herman W7VOA November 23, 2013
TACLOBAN, PHILIPPINES - All of Tacloban's 15 radio stations were knocked off the air when Typhoon Haiyan devastated the Philippine city of 220,000 people. A response within 72 hours by volunteers managed to get an emergency station on the air - the only local mass means for the survivors there to get instant, reliable information.
"It is now 10:07. This is 98.7 FM, First Response Radio broadcasting live in Tacloban city." The voice of Magnolia Yrasuegui is filling a void. Around the clock, live and on tape, she and others are heard across the destroyed city informing residents on how and where to get help.
The portable station, part of an international non-profit network of radio technicians, is contained in a couple of suitcases that were stored in Manila.
An initial small 50-watt transmitter is being replaced by a more powerful 600-watt unit.
Even the weaker signal, though, could be heard for kilometers emanating from a small antenna erected on the roof of the damaged city hall.
Survivors are seeking accurate information about the fate of family members and their city, according to Yrasuegui. "Rumors have been flying out and they do not know anything about what happened to them, if their relatives are still there. So communication also is aid."
With no electricity service in the city and batteries a scarce commodity, volunteers from the station have distributed hundreds of solar and crank-up radios to people in evacuation centers.
They get to hear from in-studio guests such as Dr. Joji Tomioka of Japan's medical team for disaster relief, which is now treating patients in Tacloban.
The five volunteers staffing First Response Radio say they will remain on the air until this city can recover to the point that at least one of its radio stations can resume broadcasting.
http://www.voanews.com/content/relief-radio-station-signals-dire- state-of-communications-in-tacloban-philippines/1796148.html
Next an image VOA correspondent Steve Herman, W7VOA, reporting from the Philippines...
|
Sending Pic:180x184C;
VOA Radiogram now changes to MFSK32 centered on 1500 Hz...
RSID: <<2013-11-30T16:16Z MFSK-32 @ 17860000+1500>>
This is VOA Radiogram in MFSK32...
Please send reception reports to radiogram@voanews.com
And visit voaradiogram.net
Twitter: @VOARadiogram
We compared MFSK64 at center frequencies of 1500 and 1000 Hz. Now
let's do the same for the new long-interleave mode MFSK64L.
VOA Radiogram now changes to MFSK64L centered on 1500 Hz...
RSID: <<2013-11-30T16:19Z MFSK-64L @ 17860000+1500>>
|
RSID: <<2013-11-30T16:21Z MFSK-64L @ 17860000+1000>>
|
This is VOA Radiogram in MFSK64L centered on 1500 Hz...
World's Largest Solar Plant to Go Online in California
Zlatica Hoke November 15, 2013
WASHINGTON — The world's largest solar thermal plant is set to go online in California by the end of the year. While wind and sun-generated energy are generally considered clean, unlike coal-generated energy, environmentalists now worry that large-scale solar development could harm fragile desert ecosystems.
Ivanpah is a field of mirrors, shimmering like a mirage in California's Mojave desert, about 60 kilometers southwest of Las Vegas. Joe Desmond is a senior official at BrightSource Energy, the company that's building the plant.
"This is actually one of the highest concentrations of sunlight in the world, out here in Ivanpah," explained Desmond.
The plant will deploy 170,000 heliostat mirrors to focus solar energy on boilers located on top of three power towers. The steam generated in these boilers will drive turbines to produce energy.
Desmond said the steam can reach temperatures of more than 260 degrees Celsius.
"We can store the sun's thermal energy in the form of molten salt, so we can produce electricity even when the sun goes down. There is a lot of interest in concentrating solar power around the globe in environments where you have lots of sun, such as China, South Africa, the Middle East, North Africa," explained Desmond.
Environmentalists generally support the idea of solar plants, but many want habitats like the one where Ivanpah is being built to stay intact.
"Even though the desert seems big, when you start cutting it up, it can really affect how the species and the animals and the plants are able to survive in the long run," said Lisa Belenky, senior attorney for the Center for Biological Diversity, a private advocacy group with offices in several U.S. states.
Belenky said some environmentalists are worried about the effect of the Google-backed Ivanpah Solar Project on the sensitive plant and animal life in this part of Mojave. BrightSource Energy has already spent more than $50 million to relocate the endangered desert tortoise, which lives in the area, but Belenky feels this is not the right solution.
"We should be reusing areas that have already been disturbed [like] old mining sites, for example... either on homes, on businesses, you can.... [place them] on parking lots," said Belenky, offering alternative locations for solar power collection.
Brightsource has already pre-sold energy to parts of southern California. It plans to start running the plant at the end of the year.
http://www.voanews.com/content/world-largest-solar-plant-online-c
VOA Radiogram now continues with MFSK64L, but changes the center audio frequency to 1000 Hz... . . . . |
This is VOA Radiogram in MFSK64L centered on 1000 Hz...
World's Largest Solar Plant to Go Online in California
Zlatica Hoke November 15, 2013
WASHINGTON — The world's largest solar thermal plant is set to go online in California by the end of the year. While wind and sun-generated energy are generally considered clean, unlike coal-generated energy, environmentalists now worry that large-scale solar development could harm fragile desert ecosystems.
Ivanpah is a field of mirrors, shimmering like a mirage in California's Mojave desert, about 60 kilometers southwest of Las Vegas. Joe Desmond is a senior official at BrightSource Energy, the company that's building the plant.
"This is actually one of the highest concentrations of sunlight in the world, out here in Ivanpah," explained Desmond.
The plant will deploy 170,000 heliostat mirrors to focus solar energy on boilers located on top of three power towers. The steam generated in these boilers will drive turbines to produce energy.
Desmond said the steam can reach temperatures of more than 260 degrees Celsius.
"We can store the sun's thermal energy in the form of molten salt, so we can produce electricity even when the sun goes down. There is a lot of interest in concentrating solar power around the globe in environments where you have lots of sun, such as China, South Africa, the Middle East, North Africa," explained Desmond.
Environmentalists generally support the idea of solar plants, but many want habitats like the one where Ivanpah is being built to stay intact.
"Even though the desert seems big, when you start cutting it up, it can really affect how the species and the animals and the plants are able to survive in the long run," said Lisa Belenky, senior attorney for the Center for Biological Diversity, a private advocacy group with offices in several U.S. states.
Belenky said some environmentalists are worried about the effect of the Google-backed Ivanpah Solar Project on the sensitive plant and animal life in this part of Mojave. BrightSource Energy has already spent more than $50 million to relocate the endangered desert tortoise, which lives in the area, but Belenky feels this is not the right solution.
"We should be reusing areas that have already been disturbed [like] old mining sites, for example... either on homes, on businesses, you can.... [place them] on parking lots," said Belenky, offering alternative locations for solar power collection.
Brightsource has already pre-sold energy to parts of southern California. It plans to start running the plant at the end of the year.
http://www.voanews.com/content/world-largest-solar-plant-online-c
VOA Radiogram now changes to MFSK32 centered on 1500 Hz... . .
|
RSID: <<2013-11-30T16:24Z MFSK-32 @ 17860000+1500>>
This is VOA Radiogram in MFSK32 centered on 1500Hz...
An image follows, showing the solar receiver tower, with mirrors
in background, at the Ivanpah solar energy plant...
RSID: <<2013-11-30T16:25Z MFSK-32 @ 17860000+1500>>
Sending Pic:178x223C;
|
Internet: |
|
|
Please send reception reports to radiogram@voanews.com
And visit voaradiogram.net
Twitter: @VOARadiogram
Thanks to colleagues at the Edward R. Murrow shortwave transmitting station in North Carolina.
I'm Kim Elliott. Please join us for the next VOA Radiogram.
This is VOA, the Voice of America.
Sending Pic:316x28C;
RSID: <<2013-11-30T16:29Z OL 64-2K @ 17860000+1500>>
Thank you for decoding the modes on VOA Radiogram.
www.rhci-online.net/radiogram/radiogram.htm
QTH: |
D-06193 Petersberg (Germany/Germania) |
Ant.: |
Dipol for 40m-Band |
RX: |
ICOM IC-R75 + IF-mixer |
Software IF: |
con STUDIO1 - Software italiano per SDR in LSB |
Software AF: |
|
OS: |
German XP-SP3 with support for asian languages |
PC: |
MEDION Titanium 8008 (since 2003) [ P4 - 2,6 GHz] |
Radio Nostalgie - Images received via EASYPAL/DSSTV on 14233 kHz/USB and 3733 kHz LSB in the last days.
|
|
|
|
|
|
|
|
|
Also looks kinda old .....
|
|
|
|