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Old 11-04-2018, 21:51   #31
Braccini
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RRI 11650 kHz DRM in South Brazil 11 APR 18

No signal today. :/
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Old 11-04-2018, 22:10   #32
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Very quiet on 11650 kHz tonight (or am I wrong?).
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Old 11-04-2018, 23:02   #33
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No signal received here again.
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Old 12-04-2018, 08:32   #34
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Weak signal, MSC bitrate up to 14.56 kbps.
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Old 12-04-2018, 23:57   #35
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RRI, 11650 kHz, Reception near Atlanta, Georgia, USA

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.
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File Type: png 11650-180412-2100-2159-Zyg.png (37.6 KB, 53 views)
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Old 13-04-2018, 22:47   #36
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RRI, 11650 kHz, Reception near Atlanta, Georgia, USA

This early evening's report - no audio decoded, about 6 dB max SNR.
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Old 14-04-2018, 00:05   #37
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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.
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Old 14-04-2018, 01:19   #38
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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.
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Old 14-04-2018, 01:55   #39
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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.

Last edited by tpreitzel : 14-04-2018 at 04:32.
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Old 14-04-2018, 23:35   #40
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RRI, 11650 kHz, Reception near Atlanta, Georgia, USA

This evening's report - 0.40% audio decoded, 11.15 dB max SNR.
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Old 15-04-2018, 00:15   #41
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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

Last edited by Braccini : 15-04-2018 at 04:34.
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Old 15-04-2018, 21:53   #42
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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.
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Old 16-04-2018, 03:48   #43
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No signal received this evening (15-April-2018).
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Old 16-04-2018, 08:31   #44
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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?
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Old 16-04-2018, 16:33   #45
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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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