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KA3BVJ > SWL 03.07.21 06:19l 58 Lines 2680 Bytes #999 (0) @ EU
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Hello friends
Shortwave Radiogram listeners have kindly offered suggestions for experiments with our digital modes. Tobias in Germany suggest
s that eliminating the brief silence (about 0.6 second). between the text introduction of an MFSK image and the image transmiss
ion, can reduce or eliminate missed image headers. This is because there is no interval of silence that can result in random ch
aracters that might interfere with the header.
On this weekend's Shortwave Radiogram, the silent gaps before the MFSK64 images will be eliminated. The gap will still exist be
tween the text and the MFSK32 image near the beginning of the program.
Also, during most of the five-second delays after the RSID when modes change (to provide time for a manual mode change if neces
sary), 1500-Hz tones will be inserted instead of silence. This might eliminate the stray characters that can be annoying.
A video of last weekend's Shortwave Radiogram (program 210) is provided by Scott in Ontario. The audio archive is maintained by
Mark in the UK. Analysis is prepared by Roger in Germany.
Here is the lineup for Shortwave Radiogram, program 211, 1-4 July 2021, in MFSK modes as noted:
1:41 MFSK32: Program preview
2:58 Christopher describes the heat wave in Oregon*
7:11 MFSK64: Hot nights hurt rice crop yields
10:51 This week's images* **
28:35 MFSK32: Closing announcements
* With image(s)
** As an experiment, the short silence between the text
introduction and image has been eliminated. This might reduce the
incidence of missed image headers.
Please send reception reports to radiogram@verizon.net
And visit http://swradiogram.net
Twitter: @SWRadiogram or https://twitter.com/swradiogram (visit during the weekend to see listeners' results)
Facebook group: https://www.facebook.com/groups/567099476753304
Shortwave Radiogram Gateway Wiki https://wiki.radioreference.com/index.php/Shortwave_Radiogram_Gateway
Shortwave Radiogram Transmission Schedule
UTC Day UTC Time Frequency Transmitter
Thursday 2330-2400 UTC 9265 kHz WINB Pennsylvania
Friday 1300-1330 UTC 15770 kHz WRMI Florida
Friday 1500-1530 UTC 15750 DRM WINB Pennsylvania
Saturday 0230-0400 UTC 9265 kHz WINB Pennsylvania
Saturday 1330-1400 UTC 15770 kHz WRMI Florida
Sunday 0800-0830 UTC 5850 kHz
7730 kHz WRMI Florida
Sunday /ex
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