Hi Lance,Well, more like resurrecting an old approach. Before HamSci and
PSKreporter, there was PropNET which used PSK31 and APRS-formatted payloads to
probe and track propagation primarily on 10 and 30 meters on a 24/7 basis. The
entire last solar cycle of data has been stored in a MySQL database. A story
for another day.
As you can imagine, the tradeoff to implementing a simplified propagation
beacon approach based on MP3 recorded audio is that there is no way to
precicely control the TX timing. An MP3 that was only 1 ms "off" from "exactly
1-minute" in duration will eventually be out of sync, of course. That is why I
was asking if there was an RX-only WSx mode that would allow for
non-synchronous decoding.
The use-case is in the VHF, UHF+ spectrum where know-code operators still scan
for CW beacons to see if the band is open for them along a given path. Adding
SSB to those beacons would make those beacons significantly more friendly to
our newest licensed no-code Technicians. Adding a Machine Decodable (MD) mode
would take it to another level for them and a good introduction to the other MD
modes, including the very popular WSx constellation.
Still, thanks for the reply! It sounds as if the WSx system doesn't support
the approach I'm seeking to experiment with at this time. Since I'm targeting
North American "Fall season" for my first beacon (to be placed in the beacon
sub-band), I have lots of time to strategize. :-)
Sincerely,Ev, W2EV
On Saturday, May 18, 2024 at 03:57:56 PM EDT, Lance Collister, W7GJ via
wsjt-devel <[email protected]> wrote:
Hi Ed,
It sounds like you are at the forefront of developing a new beacon network ;-)
I
would suggest that you consider setting up your beacons to transmit FT in the
first
and third 15 seconds of each minute, with CW and SSB each in one of the other
two
sequences. As long as your transmitter is synced with UTC, people will be able
to
decode the FT8 sequences.
GL and VY 73, Lance
On 5/18/2024 18:37:28, Ev Tupis via wsjt-devel wrote:
> Hello all,
> Later this fall, I hope to install a constellation of multi-mode VHF+
> beacons. CW,
> SSB, and MD (machine decodable) all in the same transmission.
>
> My intention is to record the audio digitally (MP3) and drive a multimode
> radio in
> "SSB" mode, playing it over-and-over.
>
> Is there a WSx mode that does not require the TXing and RXing stations to be
> timeslot locked?
>
> I can always fall "back" to PSK31/63 or RTTY, but would like to explore the
> WSx
> approach a bit before I do.
>
> If this is off-topic, I would be happy to receive off-list input, of course.
>
> Thank you for the work that you do.
>
> Sincerely,
> Ev, W2EV
>
>
>
> _______________________________________________
> wsjt-devel mailing list
> [email protected]
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--
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