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Old 06-09-2019, 05:46   #16
Digger
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5th Sep. 2019

KTWR towards Japan, logged for 13 minutes from 1042-1055 UTC. A very weak signal. Max. 9,98 dB SNR and 0,48% decoded audio.
Meta Data: 18,44 kbps, ID:1004.
Technical: Mode A/10, 2s, 16/16 QAM, P:1/0, A:1/D:0 Timestamp: Yes.
Result: Almost no decoding with the FRG-7700. Not with the DR111 either.
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Old 12-09-2019, 04:29   #17
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11th Sep. 2019

KTWR DRM (KTWR) towards China, logged for 33 minutes from 1025-1058 UTC. A weak signal around 23-29 dBµV in strength. Max. 12,16 dB SNR and 33,22% decoded audio.

Technical data at the beginning:
Meta data: 11,64 kbps, EEP, aac, Mono, English, Religion, Guam, ID:1003
Technical: Mode B/10, 2s, 4/16 QAM, P:0/0, Audio:1 / Data:0 Timestamp: Yes

The parameters changed during the transmission !

Technical data later:
Meta data: 9,18 kbps, EEP, aac, Mono, English, Religion, Guam, ID:1003
Technical: Mode C/10, 2s, 4/16 QAM, P:0/0, Audio:1 / Data:0 Timestamp: Yes

Audio Spectrum: about 4000 Hz (both modes). Audio quality: Quite OK for spoken contents. Result: Poor to moderate reception in Japan.

Could there have been co-channel QRM? At the end of the transmission decoding became perfect (though there was no audio).
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File Type: png 11995-190911-1025-1058-Two_modes.png (43.8 KB, 70 views)
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Old 25-09-2019, 02:54   #18
alokesh
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Message from Steve Brunson, KTWR Chief Engineer, Agana, Guam....

Dear DRM Monitors,

One of our three transmitters is currently down. We won’t be able to fit our DRM test to China into the schedule for tonight, 25 September. It’s possible that we won’t be ready for our DRM broadcast to Japan tomorrow night, 26 September. We’ll send an update when there’s news to report.

Thank you for your interest and your great data!
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Old 07-11-2019, 00:23   #19
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6th Nov. 2019

KTWR to China logged for 25 minutes from 1030-1055 UTC. Max. 9,64 dB SNR and 7,08% decoded audio. Meta data: 10,26 kbps, EEP, aac, Mono, English, Religion, Guam, ID:1001. Technical: Mode B/10, 2s, 4/16 QAM, P:0/0, Audio:1 / Data:1 Timestamp: Wed. 6. Nov 10:38:00 2019. MOT Slide Show: The signal was too weak to decode it.
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File Type: png 11995-191106-1030-1055-Hatori.png (40.6 KB, 38 views)
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Old 07-05-2020, 01:00   #20
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KTWR Mandarin in Chinese towards China logged for 30 minutes from 1026-1056 UTC. Max. 15,07 dB SNR and 49,66% decoded audio (64.9% between 1026-1048 UTC). The Bitrate was 13,18 kbps and they had KTWR MOT Slide show of which I got nothing because of Fading. The signal virtually disappeared towards the end of the transmission. There were Text Messages in English and Chinese during the transmission. Audio BW: Max. 11000 Hz. Audio quality: Spoken Chinese: Very good.
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File Type: png 11995-200506-1026-1056-Hatori.png (42.5 KB, 16 views)
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Old 01-06-2020, 04:40   #21
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13 May

KTWR Mandarin in Chinese towards China logged with FRG-7700 for 30 minutes from 1026-1056 UTC. Max. 16,90 dB SNR and 74,68% decoded audio.
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File Type: png 11995-200513-1026-1056-Hatori.png (41.7 KB, 1 views)
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Old 01-06-2020, 04:57   #22
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20 May

KTWR Mandarin in Chinese towards China logged with FRG-7700 for 30 minutes from 1026-1056 UTC. Max. 16,14 dB SNR and 53,26% decoded audio. The Bitrate was 13,18 kbps and they had KTWR MOT Slide show of which I could not get anything.
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File Type: png 11995-200520-1026-1056-Hatori.png (34.5 KB, 5 views)
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