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Old 07-03-2012, 11:20   #1
Digger
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Voice of Nigeria 15120 kHz from Abuja

A test transmission from Voice Of Nigeria. Low bitrate but fairly good sound when they played music but terrible when they started talking. Riyadh killed the fun just before 12 UTC.
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File Type: png 15120-120307-1130-1201-HED362@SE.png (41.7 KB, 1519 views)
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Last edited by Digger : 07-03-2012 at 11:26.
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Old 07-03-2012, 11:32   #2
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Test transmission from VON . Log 57min.
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File Type: png 15120-120307-1051-1148-SIXTEN .png (45.0 KB, 1390 views)
File Type: png 15120.png (11.8 KB, 1377 views)
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Old 07-03-2012, 14:41   #3
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More test transmission Log 2h 14min. But very problem for strong AM .

Vet good TX SNR up to 32.5dB ...
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File Type: png 15120-120307-1313-1527-SIXTEN .png (50.4 KB, 1316 views)
File Type: png 15120-100kw_North.png (13.7 KB, 1265 views)
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Old 07-03-2012, 15:17   #4
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I clicked the checkbox to log the reception, however, DREAM did not write anything usefull for the plotter into the files.
At least it recorded this: SNR min: 3.1, max: 19.7 (I guess the max. was at about 1440 UTC when I stopped the log)
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Old 08-03-2012, 08:35   #5
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Log this morning 51min. Very strong signal ,but very bad audio !!!! BW3kHz
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Old 08-03-2012, 08:53   #6
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My log resembles Sixten's very much in regard to the Doppler values. A few drop-outs might have been due to the use of electric machinery in the house. The transmission ended suddenly at 0920 UTC.

I think that the audio was pretty good despite the low bitrate. The levels were perfect and the vocals sounded rather good even though the audio bandwidth was limited to 3000 Hz.


(Thanks Simone for fixing the headline)
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File Type: png 15120-120308-0822-0921-HED362@SE.png (41.8 KB, 1309 views)
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Old 08-03-2012, 14:58   #7
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More log today. Very strong AM in 1503 log. Last.
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File Type: png 15120-120308-1027-1204-SIXTEN .png (48.8 KB, 1177 views)
File Type: png 15120-120308-1503-1537-SIXTEN .png (50.3 KB, 1202 views)
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Old 08-03-2012, 17:55   #8
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An unattended log from this afternoon. Severe co-channel QRM from a 500 kW AM TX in Saudi-Arabia. By the way, Voice Of Nigeria is not scheduled for this time of the day on 15120 kHz.
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File Type: png 15120-120308-1307-1543-HED362@SE.png (45.7 KB, 1239 views)
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Old 09-03-2012, 10:32   #9
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Very good signal stringth this morning 44dbuV from start down to 28dbuV 1120UTC Log 1h 40min.
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Old 09-03-2012, 13:45   #10
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Nearly perfect reception this morning. Nice text message: "Test with THOMSON transmitter TSW2300D. 125 kW, fixed curtain antenna to North. Greeting from Abuja, Nigeria."

Is this only a temporary test, or will they continue until I arrive back in Switzerland around the 25th March?

@Simone: Thanks, dunno what happened there... Five views down the drain - hihi OK, the whole window must be on the desktop... I see...
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File Type: png 15120-120309-1016-1121-HED362@SE.png (41.0 KB, 1046 views)
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Last edited by Digger : 09-03-2012 at 17:44.
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Old 09-03-2012, 17:02   #11
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Not as good over here.
@ Digger: Can you please check your attachment. As far as I know it is only a test transmission for now.

Simone
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Old 12-03-2012, 10:42   #12
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Log 3h 19min. Propagation better today on 15Mhz . Signal stringth was S9+20dB in start. And down to S9 in stop time. 1130.UTC

Her is report this morning Bodo.
And picture of 15Mhz band this morning.
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File Type: png 15120-120312-0811-1130-SIXTEN .png (45.1 KB, 976 views)
File Type: jpg 1000snt.jpg (45.5 KB, 976 views)
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Last edited by Sixten : 12-03-2012 at 10:50.
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Old 12-03-2012, 11:17   #13
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Almost perfect reception except towards the end in this mostly unattended log. I heard the start and listened for an hour or so, then I had to leave. The Doppler was fairly high at times, the SNR dipped suddenly around 0835 UTC but around 0912 it rose again suddenly. Perhaps this was caused by splatter from an adjacent channel. SNR peaked at 24 dB on my Roadstar, which never produces much higher values.
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File Type: png 15120-120312-0811-1130-HED362@SE.png (43.6 KB, 968 views)
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Last edited by Digger : 12-03-2012 at 15:48.
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Old 12-03-2012, 15:39   #14
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Just found this on German A-DX mailinglist:

> Bodo, 5N7Q, is in Abuja since last Wednesday, testing everyday on 15120
> and 11770 kHz DRM.
>
> Official inauguration ceremony on 13 March from 0800 till 1200 UTC with
> special broadcast on 15120 kHz DRM (including Nigerian President speaking
> live around 0930 UTC).


(Harald Kuhl, via DXplorer, forwarded to A-DX by Wolfgang Büschel)
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Old 12-03-2012, 21:41   #15
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Quite good results in the first 2.5 hours, nothing received on the other frequency today.
Simone
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