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Old 07-03-2012, 12:20   #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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Last edited by Digger : 07-03-2012 at 12:26.
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Old 07-03-2012, 12:32   #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, 1455 views)
File Type: png 15120.png (11.8 KB, 1434 views)
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Old 07-03-2012, 15:41   #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, 1365 views)
File Type: png 15120-100kw_North.png (13.7 KB, 1327 views)
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Old 07-03-2012, 16:17   #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, 09:35   #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, 09:53   #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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Old 08-03-2012, 15:58   #7
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More log today. Very strong AM in 1503 log. Last.
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File Type: png 15120-120308-1503-1537-SIXTEN .png (50.3 KB, 1268 views)
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Old 08-03-2012, 18:55   #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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Old 12-03-2012, 16:39   #9
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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, 22:41   #10
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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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Old 13-03-2012, 12:12   #11
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Hi Bodo.

Perfect reception from start , 0800 to 1130 , now start strong AM on freq.
Fantastic strong and stabil signal from Nigeria .

SNR MAX 32.37db
And i can see this audio is from studio , and gives bad quality, thats what i transmit on DRM.
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Old 13-03-2012, 20:23   #12
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I saw DRM just after 07 UTC, but just for a minute and enough to shoot the Label. At 0725 UTC the signal came back, but there was strong co-channel interference, which could be seen in SNR Spectrum in Dream. At 0758 UTC the Co-channel QRM ended and the decoding was perfect. I noted at 0943 UTC that the channel was still clear since 0758 UTC. Around 1000 UTC the signal had gotten weaker but a fair signal, clear channel, perfect decoding of 9.1 kbps. Then there was a TX break just before 09 UTC, and I stopped my log by mistake. Unfortunately Dream crashed as well, adding to my problems. So my log for today is a bit of a patchwork. The second screen-shot is the best part from 0758 to 1005 UTC with 99.86% CDA. Very good. I also recorded a few hours of audio if anyone is interested.
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File Type: png 15120-120313-0725-1150-HED362@SE.png (47.9 KB, 1072 views)
File Type: png 15120-120313-0758-1005-HED362@SE.png (42.6 KB, 1092 views)
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Old 14-03-2012, 21:19   #13
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March 13

Good results in the first two hours yesterday.

Simone
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Old 26-03-2012, 20:28   #14
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Bonsoir Daniel, ici pareil très bon signal mais coupures fréquentes avec comme un top synchro.

Hello ALL

Reception in Northeast France is Good SNR : 21 to 21,5 DB modulation is good, many stop from audio is curious.
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Old 27-03-2012, 21:11   #15
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Log this evning 1h 30min. Very strong signal but problem with audio.

S9+20dB and MAX SNR 26.73db Very good DRM signal.
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