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Old 29-08-2015, 22:41   #241
mitajohn
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Aug_29

A perfect result (99.99% CDA) with new label, protection level 0/0 and max SNR 29.9 dB. Log 288 mins.
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File Type: png 7550-150829-1742-2230-mitajohn.png (36.6 KB, 111 views)
File Type: png 7550_150829_1742_mitajohn.png (25.6 KB, 105 views)
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Old 30-08-2015, 21:31   #242
PP5AZF-Ataliba
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Good signal in Florianopolis City - Brasil - GG52QK
Distance: 14.220 Km
https://www.google.com.br/maps/@-26....,-50.385227,6z
Attached Images
File Type: png AIR-7550-BANGALUR-20150830-2128.png (92.0 KB, 96 views)
File Type: png 7550-150830-2052-2128-PP5AZF.png (34.1 KB, 102 views)
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Plataforma Brasileira do Digital Radio Mondiale
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ABRADIG - Associação Brasileira de Radio Digital
www.abradig.org.br

Amostras de áudio de algumas rádios DRM:
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Old 30-08-2015, 22:09   #243
mitajohn
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A result for 3H55m at 99.98% CDA, max SNR 32.3 dB, protection level 0/1. The 1st plot is with both SWs and services, only SNR differences between the two SWs.
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File Type: png 7550_150830_1745_mitajohn.png (28.2 KB, 103 views)
File Type: png 7550-150830-1745-2140-mitajohn.png (36.7 KB, 100 views)
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Old 31-08-2015, 00:28   #244
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Hi,

I saw the label in Japan and was a bit confused about the title "CHINESE SERVICE". As far as I understand this transmission is directed to Europe? Anyway, in central Japan all I can see is a trace of signal, but today I caught the Label too. I get 6-9 dB SNR and the Channel Impulse Response is flat as a pancake so there is no chance of any decoding.
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File Type: png 7550chineseservice2037utc30aug2015title.png (12.3 KB, 105 views)
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Old 31-08-2015, 00:52   #245
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BGL 7550 kHz 2100UTC September 2015 VOAAREA Plot

Hi Terje and Ataliba,

There is a lobe going towards Brazil as shown on the attached plot.

The signal strengths are assuming a 6ft whip antenna and are as follows:

Orange is 22 dBu (S-7)
---Blue is 28 dBu (S-8)
---Pink is 34 dBu (S-9)
Yellow is 44 dBu (S-9+10dB)
--Grey is 54 dBu (S-9+20dB)
-White is 64 dBu (S-9+30dB)
Attached Images
File Type: png BGL 7550 kHz 2100 UTC September 2015.png (96.0 KB, 115 views)
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Old 31-08-2015, 22:40   #246
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A perfect result, 99.99% CDA for 4 H 42 mins. Max SNR just over 30 dB, signal 60-70 dBuV.

@ Zyg, the plot is pretty accurate for my area.
Attached Images
File Type: png 7550-150831-1748-2230-mitajohn.png (37.5 KB, 99 views)
File Type: png 7550_150831_1748_mitajohn.png (25.2 KB, 98 views)
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Old 01-09-2015, 05:14   #247
PP5AZF-Ataliba
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Quote:
Originally Posted by PP5AZF-Ataliba
Good signal in Florianopolis City - Brasil - GG52QK
Distance: 14.220 Km
https://www.google.com.br/maps/@-26....,-50.385227,6z

Decoded audio 95,29% (2055-2130h)
FAC CRC 100%
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File Type: png 7550-150830-2055-2130-PP5AZF.png (34.5 KB, 92 views)
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Plataforma Brasileira do Digital Radio Mondiale
www.drm-brasil.org

ABRADIG - Associação Brasileira de Radio Digital
www.abradig.org.br

Amostras de áudio de algumas rádios DRM:
www.zandomenego.com/ataliba/drm

Youtube channel:
www.youtube.com/atalibazf
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Old 01-09-2015, 11:15   #248
AF4MP
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Quote:
Originally Posted by mitajohn
@ Zyg, the plot is pretty accurate for my area.

Hi John,

Thank you for the feed back.
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Old 01-09-2015, 17:51   #249
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Sept_01

A new label tonight.
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Old 01-09-2015, 20:47   #250
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Hi,

My first try with DRM after the upgrade to Win 10. Everything worked directly.
I noticed that the label changed after a few minutes of listening from:
GENERAL OVERSEAS SERVICE-IV FROM SPT AIR BANGALORE
to:
HINDI SERVICE FROM SPT AIR BANGALORE

Time: 19:54-20:40 UTC. Tesult: 100 % CDA.
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Old 01-09-2015, 21:39   #251
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At 21H04 the label changed as well as the protection level to 0/0.

I added the label of the second service.
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File Type: png 7550_20150901_mitajohn_LBL2.png (6.1 KB, 96 views)
File Type: png 7550_20150901_mitajohn_LBL3.png (6.9 KB, 108 views)
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Last edited by mitajohn : 01-09-2015 at 21:53.
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Old 01-09-2015, 22:39   #252
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Perfect decoding for 4 H 43 mins, 30.4 dB max SNR. Two labels as seen in my previous posts.
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File Type: png 7550-150901-1747-2230-mitajohn.png (37.4 KB, 98 views)
File Type: png 7550_150901_1747_mitajohn.png (25.3 KB, 102 views)
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Old 02-09-2015, 22:41   #253
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99.56% CDA for a 290 mins log. Astonishingly high max SNR, at 35.2dB.
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File Type: png 7550_150902_1739_mitajohn.png (27.1 KB, 92 views)
File Type: png 7550-150902-1739-2230-mitajohn.png (39.9 KB, 93 views)
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Old 03-09-2015, 11:54   #254
AF4MP
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AIR Bangalore India 7550 kHz reception near Atlanta, Georgia, USA

The signal even managed to show up here with a little SNR towards the end!
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File Type: png 7550-150902-2057-2229-Zyg.png (28.4 KB, 100 views)
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Old 03-09-2015, 22:38   #255
mitajohn
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99.6% CDA for a 287 mins log, max SNR at 32.6 dB. After the log's start a short TX breakdown occurred.
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File Type: png 7550-150903-1743-2230-mitajohn.png (37.3 KB, 84 views)
File Type: png 7550_150903_1743_mitajohn.png (25.8 KB, 85 views)
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