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Old 20-04-2015, 17:48   #1
Digger
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Join Date: Mar 2005
Location: Shizuoka City, Japan
Posts: 9,821
AIR on 7550 kHz from Bangalore

AIR Test transmissions from 20 April to 30 April 2015. A strong signal, but CIR is bad. Chopped audio. And - they have forgotten to switch on the hum tonight!

21 dB SNR and chopped up audio...

A 286 minutes long, partly unnatended with 54.6% decoded audio. Max SNR was 28.48 dB at 2045 UTC.

The second attachment is a 45 minutes segment from 2026 UTC. Despite an average SNR of 25 dB the decoded audio was only 96%. There must be a better configuration?! I believe that the bad CIR is the biggest problem to the decoding.
Attached Images
File Type: png 7550-150420-1743-2229-Terje@SE.png (47.1 KB, 1146 views)
File Type: png 7550-150420-2026-2110-Terje@SE.png (40.9 KB, 1070 views)
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Regards,
Terje

https://www.hobbyradio.se/en/drm/web....index_en.html

Last edited by Digger : 21-04-2015 at 05:37.
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