[amsat-bb] Re: Arecibo

Edward Cole kl7uw at acsalaska.net
Thu Apr 15 11:22:00 PDT 2010

At 08:23 AM 4/15/2010, Bob- W7LRD wrote:

>Should I be so lucky as to connect with Arecib o this weekend, what 
>is the proper protocol for a QSO?
>73 Bob W7LRD
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A good question since they will be using SSB, initially.  I do not 
operate eme on 432+ but I believe that normal calling is done on 
2-1/2 minute sequences.  I suspect that will not be done with Arecibo 
(but they should say what their operating protocol will be).

Normal eme protocol goes like this:
CQ de KP4AO  calls for 2.5 minutes
KP4AO de KL7UW means KL7UW copied KP4AO call sign (not calling in the 
blind); calls for 2.5 minutes
KL7UW de KP4AO signal report (May be RST or OOO); also means Arecibo 
copied both KP4AO and KL7UW's call sign; gives report for 2.5 minutes
KP4AO de KL7UW roger your report (RO) and/or RST; for 2.5 minutes
KL7UW de KP4AO RRR  means I copied your report; for 2.5 minutes
KP4AO de KL7UW 73 and SK;  end of successful contact; for 2.5 minutes
total time 15-minutes

So with 2:45 hours of operation 11 QSO's could be made; so I do not 
expect the usual 2.5 minute time sequence.

That is usual for CW and digital eme, but I do not know what is 
likely to ensue with the expected pile up on SSB.  But for proper eme 
both calls must be given and confirmed (unlike HF were only one call 
is stated and the other station, assumed).

73, Ed - KL7UW, WD2XSH/45
BP40IQ   500 KHz - 10-GHz   www.kl7uw.com
EME: 144-600w, 432-100w, 1296-60w, 3400-fall 2010
DUBUS Magazine USA Rep dubususa at hotmail.com

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