Bill,
There is no confusion as to what are considered even and odd minute numbers.
But as long as I have been doing meteor scatter (since the mid 60's), here in
the States, for 15 second sequence M/S schedules, we have always considered
each minute to be broken into 4 sequences. The first and third 15 second
periods are called ODD and the 2nd and 4th periods are called EVEN.
Your way of reasoning 'even' and 'odd', when referring to 15 second periods,
assumes that the even periods begin at the 00, 15, 30 & 45 second marks. Others
may reason that the first period starts at second number 01 and not second
number 00. Have European meteor scatter enthusiasts always considered the
first 15 second period of each minute to be odd or even?
I believe that my suggestion of changing the present FT8 screen's "Tx
even/1st" description to "1st & 3rd 15 second sequence" or an abbreviated
version of "1st & 3rd 15 sec seq" will make the meaning of the check box very
clear as to eliminate the present ambiguity.
73,
Rich - K1HTV
= = =
Date: Fri, 4 Aug 2017 18:59:40 +0100
From: Bill Somerville <g4...@classdesign.com mailto:g4...@classdesign.com >
To: wsjt-devel@lists.sourceforge.net mailto:wsjt-devel@lists.sourceforge.net
Subject: Re: [wsjt-devel] FT8 "Tx Even/1st" label ambiguity
Message-ID: <15936bbf-e02c-0491-420c-19b944bf1...@classdesign.com
mailto:15936bbf-e02c-0491-420c-19b944bf1...@classdesign.com >
Content-Type: text/plain; charset="utf-8"; Format="flowed"
On 04/08/2017 18:52, Rich - K1HTV wrote:
> On the FT8 screen, there is an ambiguity as to meaning "Tx even/1st".
> A number of folks new to the mode have expressed some confusion as to
> their meanings.
>
Hi Rich,
I don't understand. 0 and 30 are even numbers, 15 and 45 are odd. If
anything the 60s T/R periods should cause confusion, but there minutes
1, 3, 5, ... are odd, minutes 0, 2, 4, 6, ... are even.
Time uses zero based indexing (well apart from months but they are
strange in all respects!), so the 15s T/R periods are the zeroth, first,
second, third.
73
Bill
G4WJS.
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