On 3/31/19 at 1:02 PM, aa...@ambersoft.com (Dave AA6YQ) wrote:
+ that WSJT-X can also support unattended operation, but there
is a huge difference between allowing WSJT-X to handle the next
response to your CQ while you refresh your coffee, and allowing
an application to call CQ and make QSOs 7x24 while you are at
work or sleeping or out for a bike ride.
The regulations say, "the control operator must be at the
control point." It is generally agreed that the control point is
where illegal operation can be stopped. There is nothing in the
regs about automatic transmission and may contest operators use
automatic CQing.
So, running for coffee is probably close enough to the control
point, particularly if you do it during the receive phase. The
others take you away for long enough that you can't maintain
effective control.
One kind of automatic operation that would probably be applauded
by many hams is the ability to send an emergency message,
automatically repeating the attempt until the message is received.
The FT8 protocol algorithms, with their weak signal performance
and automatic error checking and correction are attractive for
such a system. I see the transmitting station compressing the
message and sending it in binary chunks using a small number of
consecutive 15 second phases as a transmission window. When the
transmission window is finished, he receiving station requests
retransmission of missing/erroneous chunks. When the complete
message has been received, the receiving station reassembles the
message and reverses the compression.
Setting up the transmission involves short messages between the
sending receiving stations verifying they are can communicate
and setting up any parameters needed. These startup messages
might be sent occasionally over periods of hours.
It is probably not possible to control how people use wsjt-x and
its protocols by technical means. It can be automated using
available computer automation software. It can be downloaded and
modified by anyone. The ways of controlling its use are the same
for all the other modes, social pressure.
We have seen bad key clicks controlled by social pressure, and
disqualification in some contests. The same applies to SSB
splatter and PSK31 over driven audio. The same mechanism applies
to how the available bandwidth is used. We have an informal
agreement that contests will avoid the WARC bands, which seems
to be a good compromise between the many hams who contest, and
those who want to be able to operate away from wall-to-wall signals.
-----------------------------------------------------------------------
Bill Frantz | When all else fails: Voice | Periwinkle
(408)356-8506 | and CW. | 16345
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CA 95032
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