3823Re: [wsjtgroup] JT65A protocol
- Jul 15, 2007Chris Cox, N0UK skrev:
> Graeme,Graeme, Chris et al
> I can't comment on what is the norm onm HF. The exchanges you describe
> are what are correct AND USED when using JT65 for its originally intended
> purpose of narrowband terrestrial DX & EME contacts on the VHF bands. It
> is amended from the standard EME protocol and reading abouyt that will
> give an understanding of the meaning of each of the exchanges in the
> In my (perhaps jaded) view, many HF operators do not exchange sufficient
> information for what would constitute a valid contact traditionally.
> i.e. both stations send and receive the pair of callsigns, some piece of
> unknown information (signal report/grid square/shoe size/etc) and then
> confirmation of such receipt. It is not uncommon on HF - especially in a
> contest to not even send your own callsign on each and every contact.
> Hence, it does not really surprise me that the "rules" as written aren't
> followed using this mode either.
It has (in record time, I might add) become customary to adhere to
something close too:
Answer CQ: hiscall mycall "rpt" (where report is taken from the "dB"
column in WSJT, and can be f.eks. "-07")
Reply to previous message: hiscall mycall R"rpt" (replaces the "RO" in
EME usage)(can as an example be "R-11")
When you have complete calls, report and "R" you send: hiscall mycall RRR
And finally a lot of creativity in how you structure your 13 chars in
the customary final "73" message, I often send "TU 73 20W PIF" to say
thank you, 73, power used and identification, all in one short message.
You may say that this has been caused by the mode's extreme
effectiveness in getting messages across, even in high QRM/low signal
A few final words to the newbie: Do tune to the other station's carrier
QRG when responding to a CQ, it rapidly gets weird if you are even a few
hundred Hz away, and other stations call too!
Generally 250Hz separation between QSOs will work just fine allthough
closer seems to work in certain conditions as well.
Good luck with a very exiting DX-mode
Vy 73 de OZ1PIF/5Q2M, Peter
** CW: Who? Me? You must be joking!! **
Ph. +45 4619 3239
DK-4130 Viby Sj.
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