ARLA/CLUSTER: Analise à nova versão beta do modo digital FT4

[João Costa > CT1FBF]

Latest FT4 beta release 'Leaps and Bounds' better

ARRL say user reports have been favorable in the wake of the release of
another new beta version of the *FT4* protocol by the WSJT-X Development
Group this week.

Release Candidate 7, WSJT-X 2.1.0-rc, which is now available for testing,
is not compatible with any previous FT4 releases.

A short mock contest session to wring out the contesting features of FT4
took place on June 4.

“Thanks to all who participated in yesterday’s FT4 mock-contest practice
session — and especially to those who provided useful feedback. It is much
appreciated!� said developer *Joe Taylor, K1JT*. “Everyone likes the
7.5-second T/R sequences, which provide operators with significantly more
human interaction time than in previous revisions of FT4. Users also
appreciated the sensitivity improvements and a larger range of acceptable
time offsets (DT).� DT represents the combined clock difference for the
transmitting and receiving computers, he explained.

Based on data compiled by Steve Franke, K9AN, Taylor said that it appears
developers have the WSJT-X timing behavior under good control on all
supported platforms, and the range of measured signal-to-noise values
extended down to –21 dB.

“I operated for about 3 hours using 100 W and a dipole,� Taylor recounted.
“I copied transmissions from 263 unique call signs and made 143 QSOs in 29
states, 5 Canadian provinces, and 15 DXCCs.�

Read the full ARRL story at
http://www.arrl.org/news/new-ft4-beta-release-leaps-and-bounds-better-than-earlier-iterations

New Beta version of FT4 now available
http://www.southgatearc.org/news/2019/june/new-beta-version-of-ft4-now-available.htm
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