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-   -   Radio Romania 11650 kHz DRM 16-QAM Spanish (http://www.drmrx.org/forum/showthread.php?t=2792)

Braccini 11-04-2018 21:51

RRI 11650 kHz DRM in South Brazil 11 APR 18
 
No signal today. :/

Digger 11-04-2018 22:10

Very quiet on 11650 kHz tonight (or am I wrong?).

AF4MP 11-04-2018 23:02

No signal received here again.

Cumbredx 12-04-2018 08:32

Weak signal, MSC bitrate up to 14.56 kbps.

AF4MP 12-04-2018 23:57

RRI, 11650 kHz, Reception near Atlanta, Georgia, USA
 
1 Attachment(s)
This early evening's report - not bad for way out of target reception - 15.32% audio decoded, 14.82 dB max SNR.

Probably could have got a little more decoding had RRI set up the protection level to 0.

AF4MP 13-04-2018 22:47

RRI, 11650 kHz, Reception near Atlanta, Georgia, USA
 
1 Attachment(s)
This early evening's report - no audio decoded, about 6 dB max SNR.

Digger 14-04-2018 00:05

1 Attachment(s)
I got up early and logged with a Kiwi SDR in Brazil. Propagation was not very good. The previous receiver I used showed no or a very weak DRM signal. The last 30 minutes or so did not produce any audio. What I heard was only fractions of words - not possible to follow the programme at all.

Braccini 14-04-2018 01:19

Quote:

Originally Posted by Digger
I got up early and logged with a Kiwi SDR in Brazil. Propagation was not very good. The previous receiver I used showed no or a very weak DRM signal. The last 30 minutes or so did not produce any audio. What I heard was only fractions of words - not possible to follow the programme at all.

Indeed, there is an extratropical cyclone on the Brazilian southeast coast, which is probably "killing" the spread. I remember that last Sunday we had a great signal on 11650 kHz, I had records of 30dB in Brazil from a friend.

tpreitzel 14-04-2018 01:55

Quote:

Originally Posted by AF4MP
I understand that there are situations where 16-QAM is required, but 64-QAM provides more capacity/services and works very well in
its target areas.


No, 64 QAM does NOT work well, much less very well, in targeted areas as numerous logs on these forums attest and the additional capacity of 64 QAM is NOT necessary except for Diveemo. ;0 Scan the broadcasts from RRI to Europe and look for examples where 64 QAM just doesn't cut it. Yes, even 16 QAM suffers in severe cases, but the threshold for decoding is lower so 16 QAM should be mandated on the shortwave bands.

We might agree ONLY on this one point. As a receiver moves from the center of a beam to the fringe, the disparity in decoding time between 64 QAM and 16 QAM increases as a function of the beam's lobes. Regardless, 16 QAM still maintains a significant advantage over 64 QAM even near the center of the beam.

AF4MP 14-04-2018 23:35

RRI, 11650 kHz, Reception near Atlanta, Georgia, USA
 
1 Attachment(s)
This evening's report - 0.40% audio decoded, 11.15 dB max SNR.

Braccini 15-04-2018 00:15

RRI 11650 kHz DRM in South Brazil 14 APR 18
 
Amazing signal in Brazil, decoding until 21: 53 UTC, using Avion/Uniwave receiver and the best Active Antenna Degen 31 MS. Now the station is Tiganesti E2 with 16-QAM, not Tiganesti E1.

VIDEO (AVION & Uniwave): https://youtu.be/itow0QNiiwk

Braccini 15-04-2018 21:53

RRI 11650 kHz DRM in South Brazil 15 APR 18
 
They did not turn on the transmitter this Sunday. No DRM or AM signal here in Brazil and Europe.

AF4MP 16-04-2018 03:48

No signal received this evening (15-April-2018). :mad:

Digger 16-04-2018 08:31

Quote:

Originally Posted by Braccini
Amazing signal in Brazil ...using Avion... receiver


Just for my information, could you find out the HW and Firmware revisions for your receiver?

Braccini 16-04-2018 16:33

Quote:

Originally Posted by Digger
Just for my information, could you find out the HW and Firmware revisions for your receiver?

Hi,
Uniwave: http://webpages.charter.net/n9ewo2/diwave100.html (only revision, I have a newer firmware version that does not work). I have the original too, working well.
- I do not recommend doing any kind of update.

Avion: http://radioaficion.com/news/avion-a...-for-download/
- When I bought Avion, it was already up to date.

Best,

Braccini


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