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Does that mean that if you tick the type 1 box, it will only
send a callsign/4 digit locator and power, whether or not you
enter a 6 digit locator in the settings box?
Presumably, if it only sends 4 digit locators, the distance will
be to the centre of the IO80 square?
Is the "preferred type 1" actually a mandatory instruction to use
type 1 then, or are there circumstances where it can still do
On 06/04/2021 21:01, Bill Somerville
06/04/2021 20:16, Julian wrote:
Can someone please explain the significance of the callsigns
being in <angle brackets>, the Locator getting truncated
when the callsign is not in angle brackets, and the distance
alternating, (58km is the correct one) on every alternate period
on wsjt and FST4W 120/300?
I can't see any explanation in the manual...
if a user enters a 6 character gridlocator into WSJT-X then the
50-bit WSPR payload cannot covey that extra information, instead
the single message WSPR format is switched to a dual message
format where the callsign, 4 character gridsquare, and transmitter
power are sent in the first, and a hash code representing the
callsign, the 6 character gridlocator, and the power are sent in
the second. So long as you have received the first message at some
point, the hash code in the second message will be translated back
to a callsign. The angle brackets tell you that the call was not
in the message received.
If you have entered a 6 character gridslocator into WSJT-X but do
not want to send the two message protocol then you can check the
"Prefer Type 1 messages" option, as you have done.