[Wswss] [PNWVHFS] digital signal on 50.299 mhz

[Tom D.]

thanks terry, i can't keep up.. 

ft8call, conversational ft8?? hehehe... 73

https://docs.google.com/document/d/159S4wqMUVdMA7qBgaSWmU-iDI4C9wd4CuWnetN68O9U/edit#heading=h.hzk9olrstx2o
>
Looks like FT8CALL to me.  The frequency is right for that mode as well.

Terry W7AMI


On 8/27/2018 5:15 PM, Tom D. wrote:
> greetings all...
>
> i need help identifying a digital signal i found on 6 meters, 50.299mhz usb, sunday august 26, between approx 2130z to 2300z. i'm located in galt ca cm98ig, about 20 miles south of sacramento, and i recieved it the strongest when aimed due west, towards fairfield, napa and santa rosa.
>
> it was a narrow signal, looking quite similar to ft8, and centered near 1500hz in the passband. for approx 90 minutes, it made short transmissions every 3-4 minutes.
>
> when i initially saw it in the bandscope, i thought it was wspr but once tuned... clearly it was something else.
>
> i went through almost all the modes available in fldigi with no luck.
>
> the poorly made video shows three screen views. 1. the first view is the fldigi program in the narrowest contestia mode, data streaming downward looks almost like a "wsjt" mode. 2. the second view is a sdr/bandscope showing the spacing and relative lengths of the 3 transmissions. 3. the last view is wsjt-x in wspr mode and you can see the transmission spacings. the horizontal line accross this view is the wspr even minute marker. also note, the second vertical signal forming a "pair" is actually multipath which changed with antenna direction.
>
> you can hear the signal in the audio portion of the video.
>
> https://youtu.be/9M6FuHg6R_c
>
> what is it? i think its a beacon??
>
> thanks 73 tom wa6osx
>
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