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Old 11-03-2020, 15:21   #16
AF4MP
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Join Date: Apr 2006
Location: Roswell, Georgia, USA
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VOA Radio Marti DRM 7345 kHz

Yesterday's reception report.

Please note the poor receive antenna.

Attachment 1: Longest audio period (51 min) not interrupted by a DRreaM crash.

Attachment 2: last plot before signal drop at 2328z.
Attached Images
File Type: png 7345-200310-1850-1941-Zyg.png (42.6 KB, 39 views)
File Type: png 7345-200310-2232-2328-Zyg.png (42.7 KB, 37 views)
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Old 11-03-2020, 23:03   #17
AF4MP
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VOA Radio Marti DRM 7345 kHz

Today's reception report.

Attachment 1: Longest audio period (1H 1 min) not interrupted by a DReaM crash.

Attachment 2: last plot before signal drop at 2338z.
Attached Images
File Type: png 7345-200311-1814-1916-Zyg.png (40.6 KB, 35 views)
File Type: png 7345-200311-2304-2338-Zyg.png (43.5 KB, 46 views)
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Old 12-03-2020, 23:20   #18
AF4MP
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VOA Radio Marti DRM 7345 kHz

Today's reception report.

A 37 min reception report (longest uninterrupted).
Attached Images
File Type: png 7345-200312-2053-2130-Zyg.png (42.1 KB, 37 views)
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Last edited by AF4MP : 12-03-2020 at 23:35. Reason: Upload correct log.
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Old 13-03-2020, 23:25   #19
AF4MP
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VOA Radio Marti DRM 7345 kHz

Today's reception report.

A 5H33m uninterrupted log!

Local receiver sunset is 2344z. At about 2320z the signal started experiencing cyclic fading from the nominal S9+10dB down to S7 or lower, and then back up to S9+10dB, for a period of about 40 minutes before starting to disappear.

The audio was being decoded at low S7 signal strengths. Unfortunately DReaM was crashing and unable to log all this activity at the end.
Attached Images
File Type: png 7345-200313-1752-2325-Zyg.png (44.7 KB, 43 views)
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Old 15-03-2020, 00:14   #20
AF4MP
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Today's reception report.

Attachment 1: Longest audio period (1H 22 min) not interrupted by a DReaM crash.

Attachment 2: Log of the last 1H 35m of the signal as received by a nearby KiwiSDR web receiver using non xHe-AAC reception.
Attached Images
File Type: png 7345-200314-1750-2034-Zyg.png (43.8 KB, 40 views)
File Type: png 7345-200314-2313-0048-Zyg.png (41.3 KB, 38 views)
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Old 15-03-2020, 21:41   #21
AF4MP
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VOA Radio Marti DRM 7345 kHz

Today's reception report.

A 1H52m reception report (longest uninterrupted).
Attached Images
File Type: png 7345-200315-2049-2240-Zyg.png (44.6 KB, 39 views)
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Old 17-03-2020, 01:25   #22
AF4MP
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VOA Radio Marti DRM 7345 kHz

Today's SNR reception report.

As the latest DReaM software tends to crash, I used the earlier version (that does not decode xHE-AAC) to show the SNR (red line) for the entire 1700 - 0200z broadcast.

Local receiver sunset of 2347z is shown on the plot.

Please note the antenna is only a 3M length of a previously longer wire that is now lying on the ground.
Attached Images
File Type: png 7345-200316-1659-0200-Zyg.png (37.1 KB, 38 views)
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Old 18-03-2020, 01:31   #23
AF4MP
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Join Date: Apr 2006
Location: Roswell, Georgia, USA
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VOA Radio Marti DRM 7345 kHz

Today's reception report.

Attachment 1: Longest audio period (2H 37m) not interrupted by a DReaM crash.

Attachment 2: Log of the last (1H 11m) of received signal before DReaM crash 1 hour before end of transmission.
Attached Images
File Type: png 7345-200317-1649-1926-Zyg.png (42.0 KB, 35 views)
File Type: png 7345-200317-2349-0100-Zyg.png (42.7 KB, 34 views)
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Old 19-03-2020, 01:42   #24
AF4MP
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Join Date: Apr 2006
Location: Roswell, Georgia, USA
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VOA Radio Marti DRM 7345 kHz

Today's reception report.

Attachment 1: Longest audio period (2H 38m) not interrupted by a DReaM crash.

Attachment 2: Log of the last received signal and end of transmission.
Attached Images
File Type: png 7345-200318-1701-1938-Zyg.png (40.6 KB, 35 views)
File Type: png 7345-200319-0016-0232-Zyg.png (38.3 KB, 40 views)
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Old 20-03-2020, 14:16   #25
AF4MP
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VOA Radio Marti DRM 7345 kHz

Yesterday's reception report (5H10m before DReaM crash).
Attached Images
File Type: png 7345-200319-1650-2201-Zyg.png (43.4 KB, 41 views)
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Old 21-03-2020, 00:05   #26
AF4MP
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Join Date: Apr 2006
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VOA Radio Marti DRM 7345 kHz

Today's reception report.

Longest uninterrupted period (2H 52m) between DReaM crashes.
Attached Images
File Type: png 7345-200320-1728-2020-Zyg.png (42.2 KB, 39 views)
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Old 22-03-2020, 02:13   #27
AF4MP
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Join Date: Apr 2006
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VOA Radio Marti DRM 7345 kHz

Today's reception report.

Thanks again to Terje who has been working on xHE-AAC updates to the DRM Log Plotter (Beta).

Attachment 1: Longest uninterrupted period (3H 01m) between DReaM crashes.

Attachment 2: Last 25 mins before signal drops out. Actually the signal went up and down with portions of decoded audio for another 8 mins before disappearing.

At this time of the year the length of daylight is increasing quickly everyday and the propagation follows suit!
Attached Images
File Type: png 7345-200321-1952-2253-Zyg.png (42.9 KB, 33 views)
File Type: png 7345-200322-0103-0128-Zyg.png (40.0 KB, 37 views)
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Last edited by AF4MP : 22-03-2020 at 02:17. Reason: changed "fast" to "quickly"
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Old 22-03-2020, 23:24   #28
AF4MP
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Join Date: Apr 2006
Location: Roswell, Georgia, USA
Posts: 10,558
VOA Radio Marti DRM 7345 kHz

Today's reception report.

For some reason there were many software DReaM crashes. Two plots attached, one earlier in the afternoon, and the other, just before the signal dropped out completely at about 0000z.
Attached Images
File Type: png 7345-200322-1821-1905-Zyg.png (40.1 KB, 39 views)
File Type: png 7345-200322-2300-2353-Zyg.png (41.7 KB, 31 views)
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Old 24-03-2020, 01:09   #29
AF4MP
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Join Date: Apr 2006
Location: Roswell, Georgia, USA
Posts: 10,558
VOA Radio Marti DRM 7345 kHz

Today's reception report.

Attachment 1: Longest audio period (1H 21m) not interrupted by a DReaM crash.

Attachment 2: Log of the last received signal and before last DReaM crash.
Attached Images
File Type: png 7345-200323-2241-0001-Zyg.png (42.8 KB, 34 views)
File Type: png 7345-200324-0036-0050-Zyg.png (39.5 KB, 36 views)
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Old 25-03-2020, 00:01   #30
AF4MP
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Join Date: Apr 2006
Location: Roswell, Georgia, USA
Posts: 10,558
VOA Radio Marti DRM 7345 kHz

Today's reception report.

At around 2000z the signal went through a period of fading and the decoded error rate increased resulting in a DReaM crash.

The last hour of the received transmission was very strong at S9 + 20 dB signal level. Interestingly and coincidently I was observing the signal via a nearby (approx 16 km away) KiwiSDR web receiver and noticed the rapid received signal drop down to S6 at 0042z

Attachment 1: Longest audio period (2H 36m) not interrupted by a DReaM crash.

Attachment 2: End of received transmission(1H 06m).
Attached Images
File Type: png 7345-200324-1829-2104-Zyg.png (43.1 KB, 38 views)
File Type: png 7345-200324-2337-0043-Zyg.png (43.4 KB, 38 views)
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