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-   Reception Results - Recent Posts (http://www.drmrx.org/forum/forumdisplay.php?f=22)
-   -   Voice of Nigeria 15120 kHz from Abuja (http://www.drmrx.org/forum/showthread.php?t=2390)

Digger 04-08-2012 05:57

Newstar DR111
 
1 Attachment(s)
Perfect DRM reception, mostly garbled audio - only one female announcer sounds relatively good. The Doppler constantly rises and at the end of the log it reached its maximum. It's a pity that nobody is able to switch to a slightly better DRM configuration. :confused:

Digger 04-08-2012 20:33

Newstar DR111
 
1 Attachment(s)
Perfect decoding, 100% CDA for 85 minutes. Even the Doppler behaved this evening.

Digger 06-08-2012 07:36

Newstar DR111
 
1 Attachment(s)
Perfect reception. Seems like the propagation has improved, as the Doppler was below 1 Hz all the time. The audio is sometimes acceptable (well, almost acceptable), sometimes distorted and garbled.

FritzWue 06-08-2012 20:12

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This transmission is nothing but a big joke.
The government spent a lot of money for the latest equipment,
and the engineers missed their lesson about how to configure a DRM modulator.

Digger 06-08-2012 20:44

Newstar DR111
 
1 Attachment(s)
At least it is a robust mode!!! No errors whatsoever. But the guy down there who answered my e-mails in the beginning doesn't do that any longer...

Anyway, despite the badmouth from PC Media in Taiwan, here is an example of good reception. If you're not in the target area, what do you expect?

This log was taken with the DR111 sitting on a table in the living-room.

Digger 07-08-2012 20:14

Newstar DR111
 
2 Attachment(s)
Amazing... the Doppler went haywire tonight once more, but the decoding was perfect. Max Doppler reached a maximum of 3.35 Hz at 1956 UTC.




(Sorry, last night the W7 compatibility settings for the Plotter were wrong).

Digger 08-08-2012 19:55

No transmission this evening? (Checked with two receivers, nada)

Digger 09-08-2012 20:24

Newstar DR111
 
1 Attachment(s)
Back on air tonight, unfortunately with the same miserable configuration. But the decoding was perfect: 100% CDA. Only the Doppler looks peculiar, but it does not impair the decoding at all.

Digger 10-08-2012 23:11

Newstar DR111
 
1 Attachment(s)
Same configuration, same Doppler pattern but 100% decoded audio.

Digger 12-08-2012 20:12

Newstar DR111
 
1 Attachment(s)
Same configuration, roughly the same Doppler pattern but 100% decoded audio.

Digger 16-08-2012 20:35

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Same muffled audio as usual, bit 100% CDA.

Digger 17-08-2012 22:23

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Just about 84% CDA this evening. Looks like the propagation was out. The Doppler was 5.7 Hz around 1947 UTC, and that was that. Finito.

Linux-DRM 18-08-2012 08:14

VON
 
One of the best received stations here, but I can't listen to VON as the audio is so awful.

Please, Voice of Nigeria sort out the bandwidth & audio, as it totally defeats the purpose of DRM!

Digger 19-08-2012 06:39

Newstar DR111
 
1 Attachment(s)
Almost perfect reception. I wrote to VoN again and asked them to switch to a different DRM Mode. I have no high expectations though...

Digger 19-08-2012 20:15

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The last 20 minutes resulted in 60% CDA. Before that the reception was perfect.

FritzWue 20-08-2012 19:12

Tuned in tonight and switched off.
NOT WORTH TO LISTEN TO.
The audio quality is much worse than with a standard AM signal.
My suspicion:
The big massas got an expensive training on how to configure a DRM modulator,
and now the untrained engineers at the station are standing in the rain. :mad:

Digger 20-08-2012 20:15

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I asked a guy down there who has answered my mails before to do something about this horrible configuration, but no reply any more...

Despite nearby heavy thunderstorms the DR111 never dropped out. The signal deteriorated towards the end when the Doppler went sky high . . .

Digger 21-08-2012 20:10

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I think this guy did not read my e-mail....

Digger 22-08-2012 22:11

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Looks like the transmission stopped early tonight. :confused:
The audio quality was so bad that you could almost not understand anything of what was said. :rolleyes: :rolleyes: :rolleyes:

Digger 23-08-2012 20:30

1 Attachment(s)
Stopped early this evening too. Good reception, terrible audio. :rolleyes:

Digger 24-08-2012 20:45

Newstar DR111 with telescopic antenna
 
1 Attachment(s)
A most peculiar log tonight. I'm not sure if those audio drop-outs were caused by lightning in the vicinity, but never mind the drop-outs, I listened for 50 minutes without understanding one single word. Overdriven, distorted, 9 kbps - near . . . near what . . . "quality" would be an insult to the audio.

Digger 26-08-2012 20:12

1 Attachment(s)
Sorry, Voice of Nigeria, this is the last log from my side until someone sets a new configuration in that DRM encoder. If I cannot be able to sort out the contents of your transmission because the sad state of your coding, then - good-bye. It is no use to have this distorted whatever-it-is blaring out of the loudspeaker. I want to LISTEN, but this is rubbish. Not even worth disk space on my side and a waste of electricity on your side.

The only plus point: Reception of whatever it was was perfect.... :rolleyes:

Mitsuru Ito 27-08-2012 19:18

hai all
I am getting VON test in Japan.
SNR was 6-10dB with few audio.
but SNR is 3db now and no station name .
DE JA2QDX M.Ito

Digger 27-08-2012 21:30

My second Newstar DR111 with telescopic antenna
 
1 Attachment(s)
Hi Mitsuru-san,

Nice to have met you last time when I was in Japan. This transmitter produces a solid signal, but the audio is a catastrophe. :eek:

Yesterday I said that was my last log, but here is another last log... :rolleyes:

Digger 31-08-2012 06:44

My second Newstar DR111 with telescopic antenna
 
1 Attachment(s)
Another last log - hi - from last night. The first 40 minutes were perfect, but then the Doppler increased and nothing was heard for about 25 minutes.

Digger 01-09-2012 08:48

My second Newstar DR111 with telescopic antenna
 
1 Attachment(s)
Only 25 minutes of good reception in the beginning and after that almost no decoding.

Digger 01-09-2012 21:12

1 Attachment(s)
Wow, they have changed the Mode from C to B (I didn't notice that yesterday!) and increased the bitrate slightly. That means I have to LISTEN to the transmission tomorrow! :p

Digger 03-09-2012 20:47

1 Attachment(s)
Had to go to the airport to pick up my XYL, so this is an unattended log. A little bit weak around 1940 so the result was not that fantastic.

SF:142, A:12 and K:4 did probably not help much either... :rolleyes:

Digger 04-09-2012 21:10

1 Attachment(s)
Back to dreadful audio, but there was a mode change around 1916 UTC. I had turned the volume down, so I cannot judge whether there was an improvement with the mode B or not.

ianf 05-09-2012 11:06

Agreed, good signal, but audio so bad cannot really listen.

Digger 05-09-2012 20:12

Newstar DR111 with telescopic antenna
 
1 Attachment(s)
The DX conditions are poor for the time being, and that affected this log. Only 61% CDA and the Doppler rose constantly all the way up until the end of the log.

Digger 07-09-2012 20:11

Newstar DR111 with telescopic antenna
 
1 Attachment(s)
Almost perfect reception this evening. But still we have to cope with this terrible sound "quality". :eek:

FritzWue 09-09-2012 19:25

The sound quality is still bad at 13 kbps tonight.
So I tried their 64 kbps, 48 kHz, stereo 1-pass CBR web stream.
mms://wms.68c1.edgecastcdn.net/2068c1/501647
Guess what? The stream is running but no audio! :D

Digger 11-09-2012 06:58

1 Attachment(s)
I listened to their AM transmissions too and they don't sound much better either.

Digger 11-09-2012 20:33

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The Doppler resembles Eiger, Mönch and Jungfrau in the Swiss Alps.... :D

Digger 13-09-2012 20:18

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Near understandable audio quality tonight too... :eek: :rolleyes:

ianf 14-09-2012 20:32

I must listen, I had given up as the audio was so bad

Digger 16-09-2012 19:58

1 Attachment(s)
Tonight something down there went very wrong... or was it the propagation that pulled a prank on us??? :confused:

FritzWue 18-09-2012 19:38

2 Attachment(s)
Just a short test, signal good, audio terrible:

AF4MP 18-09-2012 20:00

Voice of Nigeria 15120 kHz reception near Atlanta, Georgia, USA
 
2 Attachment(s)
A short log of this afternoon's reception - 56.93% audio decoded, max SNR 15.54 dB.

The audio, as others have commented, was poor.

There was interference from super strong analog REE on 15110 kHz.


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