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Old 24-04-2020, 22:21   #46
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.

Attachments 1 & 2: The two longest audio periods (2H 03m, 1H 13m) not interrupted by a DReaM software crash.

At approximately 2140z the propagation is changing and the skip zone starts to extend thereby reducing the received signal level.
Attached Images
File Type: png 7345-200424-1744-1947-Zyg.png (42.9 KB, 34 views)
File Type: png 7345-200424-2033-2146-Zyg.png (42.4 KB, 37 views)
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Old 03-05-2020, 04:06   #47
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VOA Radio Marti DRM 7345 kHz

Today's reception report.

The signal was very strong with S meter reading S9 + 20 dB during the afternoon and during the evening rising in strength to S9+40 dB (hitting the meter needle against the stop)!

Was able to log most of the transmission with just one DReaM crash!

Attachment 1: First uninterrupted decoded audio section (5H 40m).

Attachment 2: Second uninterrupted decoded audio section (1H 57m).
Attached Images
File Type: png 7345-200502-1808-2349-Zyg.png (46.4 KB, 28 views)
File Type: png 7345-200503-0004-0200-Zyg.png (43.9 KB, 26 views)
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Old 04-05-2020, 02:14   #48
AF4MP
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VOA Radio Marti DRM 7345 kHz

Today's reception report.

A few more DReaM software crashes this afternoon.

As this was an unattended monitoring I was only able to check on the decoding and logging software a few times during the transmission.

Attachment 1: First longest uninterrupted decoded audio section (2H 57m).

Attachment 2: Second longest uninterrupted decoded audio section (1H 16m).

Please note that the highest received SNR shown on the attached logs is 24.09 dB which is pretty good considering the receiver is 40 years old and in need of a tune-up!
Attached Images
File Type: png 7345-200503-1702-2000-Zyg.png (41.9 KB, 30 views)
File Type: png 7345-200503-2051-2207-Zyg.png (45.1 KB, 31 views)
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Old 05-05-2020, 01:33   #49
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: First longest uninterrupted decoded audio section (2H 58m).

Attachment 2: Second longest uninterrupted decoded audio section (2H 32m).
Attached Images
File Type: png 7345-200504-1645-1943-Zyg.png (41.6 KB, 29 views)
File Type: png 7345-200504-2054-2326-Zyg.png (45.1 KB, 33 views)
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Old 09-05-2020, 01:14   #50
AF4MP
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VOA Radio Marti DRM 7345 kHz

Yesterday's (7-May-20) reception report.

Attachment 1: First longest uninterrupted decoded audio section (1H 38m).

Attachment 2: Second longest uninterrupted decoded audio section (2H 36m).
Attached Images
File Type: png 7345-200507-1825-2004-Zyg.png (44.5 KB, 22 views)
File Type: png 7345-200507-2226-0102-Zyg.png (45.4 KB, 24 views)
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Old 10-05-2020, 02:17   #51
AF4MP
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Location: Roswell, Georgia, USA
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VOA Radio Marti DRM 7345 kHz

Today's reception report.

Attachment 1: First longest uninterrupted decoded audio section (1H 26m).

Attachment 2: Second longest uninterrupted decoded audio section (2H 18m).

Although the external DReaM software crashes, a receiver such as the KiwiSDR with its built-in xHE-AAC decoding will provide seamless high quality received audio throughout the entire broadcast period.

Yesterday the DReaM program only crashed once, but unfortunately I erroneously did not log the session.
Attached Images
File Type: png 7345-200509-1855-2021-Zyg.png (44.3 KB, 22 views)
File Type: png 7345-200509-2044-2302-Zyg.png (45.8 KB, 22 views)
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Old 11-05-2020, 02:39   #52
AF4MP
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VOA Radio Marti DRM 7345 kHz

Today's reception report.

Attachment 1: First longest uninterrupted decoded audio section (3H 25m).

Attachment 2: Second longest uninterrupted decoded audio section (1H 28m).
Attached Images
File Type: png 7345-200510-1850-2216-Zyg.png (45.5 KB, 20 views)
File Type: png 7345-200511-0027-0155-Zyg.png (42.8 KB, 23 views)
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Last edited by AF4MP : 11-05-2020 at 02:42. Reason: Corrected downloaded files
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Old 12-05-2020, 01:14   #53
AF4MP
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Join Date: Apr 2006
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VOA Radio Marti DRM 7345 kHz

Today's reception report.

Attachment 1: First longest uninterrupted decoded audio section (5H 20m) - decoded audio 99.99% that's not bad for 5 hours and 20 minutes!

Attachment 2: Second longest uninterrupted decoded audio section (2H 5m).
Attached Images
File Type: png 7345-200511-1647-2207-Zyg.png (45.3 KB, 22 views)
File Type: png 7345-200511-2223-0027-Zyg.png (44.8 KB, 18 views)
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Old 13-05-2020, 03:28   #54
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: First longest uninterrupted decoded audio section (2H 14m).

Attachment 2: Second longest uninterrupted decoded audio section (0H 34m).
Attached Images
File Type: png 7345-200512-1646-1900-Zyg.png (44.8 KB, 15 views)
File Type: png 7345-200513-0040-0115-Zyg.png (41.8 KB, 17 views)
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Old 15-05-2020, 02:21   #55
AF4MP
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VOA Radio Marti DRM 7345 kHz

Today's reception report.

Logging started late, many DReaM crashes.

Attachment 1: First longest uninterrupted decoded audio section (0H 50m).

Attachment 2: Second longest uninterrupted decoded audio section (0H 39m).
Attached Images
File Type: png 7345-200514-2119-2209-Zyg.png (40.0 KB, 20 views)
File Type: png 7345-200514-2212-2251-Zyg.png (40.2 KB, 19 views)
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Old 17-05-2020, 14:16   #56
AF4MP
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Join Date: Apr 2006
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VOA Radio Marti DRM 7345 kHz

Yesterday's reception report.

Many DReaM crashes.

Attachment : Longest uninterrupted decoded audio section (0H 49m).

Although the received signal was strong the SNR was going up and down causing the DReaM software to crash.
Attached Images
File Type: png 7345-200516-1901-1950-Zyg.png (40.2 KB, 27 views)
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Old 19-05-2020, 23:06   #57
AF4MP
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VOA Radio Marti DRM 7345 kHz

Today's reception report.

As has occurred during the last week or so - many DReaM crashes.

The propagation, these days, showing swings in SNR from 20 to 10 dB while the signal strength remains fairly constant at S9 + 5 to 10 dB.

Attachment :The longest uninterrupted decoded audio section (0H 40m).
Attached Images
File Type: png 7345-200519-1817-1857-Zyg.png (42.2 KB, 18 views)
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Old 20-05-2020, 22:23   #58
AF4MP
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Join Date: Apr 2006
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VOA Radio Marti DRM 7345 kHz

Today's reception report.

The DReaM crashes continue due to signal changes. These are the fault of the decoding software and not the receiver. My colocated KiwiSDR was seeing the same SNR changes but did not lose synch.

Attachment 1: Shows a varying relatively high Doppler signal with peaks corresponding to SNR lows. This being due to the more NVIS propagation (from the transmitter only 677 km away) during the much longer daylight hours (0H 40m).

Attachment 2: Second longest uninterrupted decoded audio section (0H 31m).
Attached Images
File Type: png 7345-200520-1707-1748-Zyg.png (42.9 KB, 15 views)
File Type: png 7345-200520-1900-1931-Zyg.png (39.8 KB, 13 views)
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Old 22-05-2020, 01:25   #59
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: First longest uninterrupted decoded audio section (1H 53m).

Attachment 2: Second longest uninterrupted decoded audio section (1H 29m).

Interestingly the signal is very strong, S9+15 to +25, particularly towards the end of the broadcast period. As the signal gets stronger the SNR drops.

During the last hour of transmission, not shown on the plot, the signal is close to S9 +40 dB on the S-meter but SNR values are around 10 dB.

Pleaase note: New cropped versions of DRM Log Plot being used - Thanks Terje!
Attached Images
File Type: png 7345-200521-1649-1842-Zyg.png (32.0 KB, 19 views)
File Type: png 7345-200521-2141-2310-Zyg.png (33.2 KB, 15 views)
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Old 25-05-2020, 23:44   #60
AF4MP
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Join Date: Apr 2006
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VOA Radio Marti DRM 7345 kHz

Today's reception report.

The received signal was being tolerated a little better by DReaM.

The signal was strong S9 + 20dB peaking to 40dB.

The SNR continued to go up and down throughout the broadcast. At 23:18 the Doppler rate was over 0.7 Hz which usually is getting close to preventing decoding with other AAC audio formats. I don't know if this xHE-AAC mode is more tolerant of the high doppler rate, but appears to be doing pretty well!

Attachment 1: First longest uninterrupted decoded audio section (0H 52m).

Attachment 2: Second longest uninterrupted decoded audio section (0H 45m).
Attached Images
File Type: png 7345-200525-2150-2242-Zyg.png (31.4 KB, 9 views)
File Type: png 7345-200525-2242-2327-Zyg.png (31.7 KB, 10 views)
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