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Author Topic: UNID Mode 6443.3 kHz 2045 UTC 2 May 2018  (Read 1829 times)

Offline ulx2

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UNID Mode 6443.3 kHz 2045 UTC 2 May 2018
« on: May 02, 2018, 2114 UTC »
Unidentified mode. The signal has been received on 6443.3 kHz (approx.) in LSB. Time: 20.45 UTC, date: 2 May 2018.

Waterfall screenshot and mp3 recording from Twente web-SDR are attached.
The signal is currently audible also here, in Kyiv.

What it could be?
« Last Edit: May 03, 2018, 1100 UTC by ulx2 »
LOC: Kyiv, Ukraine
RX1: Degen DE-1103 portable
RX2: Xhdata D-808 portable
RX3: Airspy Mini SDR + Spyverter
ANT1: 80 mb dipole
ANT2: Long wire (10 meters)
ANT3: Homemade M0AYF active loop
ACC: Homemade passive preselector & phasing device

https://udxb.blogspot.com/

Offline Josh

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Re: UNID Mode 6443.3 kHz 2045 UTC 2 May 2018
« Reply #1 on: May 03, 2018, 1758 UTC »
Batputer says it's fsk, 230Hz shift, 300Bd, 530Hz bandwidth. There's a CIS-12 log here recently but this sig's not CIS-12.
We do not encourage any radio operations contrary to regulations.

Offline ulx2

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Re: UNID Mode 6443.3 kHz 2045 UTC 2 May 2018
« Reply #2 on: May 21, 2018, 0025 UTC »
Thanks for the information, Josh.
LOC: Kyiv, Ukraine
RX1: Degen DE-1103 portable
RX2: Xhdata D-808 portable
RX3: Airspy Mini SDR + Spyverter
ANT1: 80 mb dipole
ANT2: Long wire (10 meters)
ANT3: Homemade M0AYF active loop
ACC: Homemade passive preselector & phasing device

https://udxb.blogspot.com/

Offline Josh

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Re: UNID Mode 6443.3 kHz 2045 UTC 2 May 2018
« Reply #3 on: May 21, 2018, 1654 UTC »
Looked at it again and it's FM-Hell possibly, knew I'd heard something similar before. 122.5baud, 230Hz shift. Hell modes mess with automated mode classifiers (used when first looking at the signal) so it doubled the baud, but I knew I'd heard the pilot tone and burst before. No idea what the message is but here's a screencap of the output;
http://s000.tinyupload.com/index.php?file_id=00910469952425641313
The light and dark backgrounds are from me trying different offsets.


http://www.w1hkj.com/modes/feld.htm
« Last Edit: May 21, 2018, 1656 UTC by Josh »
We do not encourage any radio operations contrary to regulations.