Hi Tim,Thanks for the tip on using Opera or MSK-144! I can research both of
those in my quest!
The script idea is a really good one when there is a dedicated computer to
control it all. In my case, I'm planning to use a simple MP3 player sending
audio into the mic jack and the transceiver's watchdog timer to assure it
doesn't go into eternal TX mode.
I appreciate your feedback on the other two modes. I'm going to dig-in there
for a while to see what I can learn.
Very best wishes,Ev
On Sunday, May 19, 2024 at 10:08:58 AM EDT, Tim Urban via wsjt-devel
<[email protected]> wrote:
Ev,
I transmit WSPR, FST4W, FT8, FT4 and MSK144 using a MP3 audio file and
precisely control the TX timing with a script.
If you were only 1 ms "off" from "exactly 1-minute" your could run the same
audio for 2000 transmissions or 33.33 hours.
If you plan to implement this in hardware only then a watchdog timer can be
used to provide the synchronization every 33.33 hours.
Opera is a simple weak signal mode which requires no synchronization and is
(machine decodable).
WSJT-X MSK144 is a mode which requires no synchronization and is (machine
decodable).
Tim N4WLO
On 5/19/2024 7:42 AM, Black Michael via wsjt-devel wrote:
The other thing to remember is combining audio on multiple transmission you
have to decrease the power on each transmission. Same thing happens the
Fox/Hound mode in WSJT-X. Two transmissions at the same time need half-power
on each to combine them for example.
So you'd have more power out of your beacon by playing round-robin. If you
run FT8 say on the top of the minute (and bottom) then squeeze your other modes
into the 15-second intervening period that would work. Otherwise you'd have to
have a GUI control to enable WSJT-X to transmit if you other modes take longer
than 15 seconds.
Mike W9MDB
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
>
>
>
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