Release note and readme file updates

This commit is contained in:
Bill Somerville 2021-09-25 17:06:41 +01:00
parent 4cd6665ea3
commit 76620d3e32
No known key found for this signature in database
GPG Key ID: D864B06D1E81618F
3 changed files with 55 additions and 23 deletions

29
NEWS
View File

@ -12,6 +12,35 @@
Copyright 2001 - 2021 by Joe Taylor, K1JT. Copyright 2001 - 2021 by Joe Taylor, K1JT.
Release: WSJT-X 2.5.0
Sept 27, 2021
-------------------------
WSJT-X in this release is nearly identical to that in WSJT-X 2.4.0.
The Q65 decoder has been enhanced to measure and compensate for linear
frequency drift in Q65 signals. In addition, the Windows installation
package now includes version 3.0 of application MAP65 which has Q65
support to match and improve on its existing JT65 capabilities.
See the 2.5.0 release candidate notices below for a summaries of the
other changes included in this release. WSJT-X 2.5.0 is bundled with
Hamlib version 4.3.1 which includes important regression repairs over
the earlier 4.3 release.
Other changes in the package since WSJT-X 2.5.0-rc6 include the
following enhancements and defect repairs:
MAP65:
- Ensure that CALL3.TXT is not deleted while updating the file (this
allows sharing using symlinks to work).
- Fix MAP65's generation of Tx3 message for abs(SNR)< 10.
WSJTX:
- Repair a defect that caused CAT errors when using WSPR band hopping
and auto tune-up with some Icom rigs.
- Ensure that CALL3.TXT is not deleted while updating the file (this
allows sharing using symlinks to work).
Release: WSJT-X 2.5.0-rc6 Release: WSJT-X 2.5.0-rc6
Sept 6, 2021 Sept 6, 2021
------------------------- -------------------------

47
README
View File

@ -14,25 +14,27 @@
Copyright (C) 2001 - 2021 by Joe Taylor, K1JT. Copyright (C) 2001 - 2021 by Joe Taylor, K1JT.
WSJT-X Version 2.3 offers ten different protocols or modes: FT4, FT8, WSJT-X Version 2.3 offers ten different protocols or modes: FT4, FT8,
JT4, JT9, JT65, QRA64, FST4, ISCAT, MSK144, WSPR, FST4W, and Echo. The JT4, JT9, JT65, Q65, FST4, MSK144, WSPR, FST4W, and Echo. The first
first seven are designed for making reliable QSOs under weak-signal seven are designed for making reliable QSOs under weak-signal
conditions. They use nearly identical message structure and source conditions. They use nearly identical message structure and source
encoding. JT65 and QRA64 were designed for EME (“moonbounce”) on the encoding. JT65 and Q65 were designed for EME (“moonbounce”), but not
VHF/UHF bands and have also proven very effective for worldwide QRP limited to just that propagation path, on the VHF/UHF bands and JT65
communication on the HF bands. QRA64 has a number of advantages over has also proven very effective for worldwide QRP communication on the
JT65, including better performance on the very weakest signals. We HF bands. Q65 has a number of advantages over JT65, including better
imagine that over time it may replace JT65 for EME use. JT9 was performance on the very weakest signals and variants with different
originally designed for the LF, MF, and lower HF bands. Its submode T/R period lengths. We imagine that over time it may replace JT65 for
JT9A is 2 dB more sensitive than JT65 while using less than 10% of the EME use, it has also proved to be very effective for iono-scatter
bandwidth. JT4 offers a wide variety of tone spacings and has proven paths on 6m. JT9 was originally designed for the LF, MF, and lower HF
highly effective for EME on microwave bands up to 24 GHz. These four bands. Its submode JT9A is 2 dB more sensitive than JT65 while using
“slow” modes use one-minute timed sequences of alternating less than 10% of the bandwidth. JT4 offers a wide variety of tone
transmission and reception, so a minimal QSO takes four to six minutes spacings and has proven highly effective for EME on microwave bands up
— two or three transmissions by each station, one sending in odd UTC to 24 GHz. These four “slow” modes use one-minute timed sequences of
minutes and the other even. FT8 is operationally similar but four alternating transmission and reception, so a minimal QSO takes four to
times faster (15-second T/R sequences) and less sensitive by a few six minutes — two or three transmissions by each station, one sending
dB. FT4 is faster still (7.5 s T/R sequences) and especially well in odd UTC minutes and the other even. FT8 is operationally similar
suited for radio contesting. On the HF bands, world-wide QSOs are but four times faster (15-second T/R sequences) and less sensitive by
a few dB. FT4 is faster still (7.5 s T/R sequences) and especially
well suited for radio contesting. On the HF bands, world-wide QSOs are
possible with any of these modes using power levels of a few watts (or possible with any of these modes using power levels of a few watts (or
even milliwatts) and compromise antennas. QSOs are possible at signal even milliwatts) and compromise antennas. QSOs are possible at signal
levels 10 to 15 dB below those required for CW. FST4 has similarities levels 10 to 15 dB below those required for CW. FST4 has similarities
@ -48,14 +50,13 @@ once per transmission. All fast modes in WSJT-X send their message
frames repeatedly, as many times as will fit into the Tx sequence frames repeatedly, as many times as will fit into the Tx sequence
length. length.
ISCAT, MSK144, and optionally submodes JT9E-H are “fast” protocols MSK144, and optionally submodes JT9E-H are “fast” protocols designed
designed to take advantage of brief signal enhancements from ionized to take advantage of brief signal enhancements from ionized meteor
meteor trails, aircraft scatter, and other types of scatter trails, aircraft scatter, and other types of scatter
propagation. These modes use timed sequences of 5, 10, 15, or 30 s propagation. These modes use timed sequences of 5, 10, 15, or 30 s
duration. User messages are transmitted repeatedly at high rate (up to duration. User messages are transmitted repeatedly at high rate (up to
250 characters per second, for MSK144) to make good use of the 250 characters per second, for MSK144) to make good use of the
shortest meteor-trail reflections or “pings”. ISCAT uses free-form shortest meteor-trail reflections or “pings”. MSK144 uses the same
messages up to 28 characters long, while MSK144 uses the same
structured messages as the slow modes and optionally an abbreviated structured messages as the slow modes and optionally an abbreviated
format with hashed callsigns. format with hashed callsigns.

View File

@ -38,6 +38,8 @@ MAP65:
WSJTX: WSJTX:
- Repair a defect that caused CAT errors when using WSPR band hopping - Repair a defect that caused CAT errors when using WSPR band hopping
and auto tune-up with some Icom rigs. and auto tune-up with some Icom rigs.
- Ensure that CALL3.TXT is not deleted while updating the file (this
allows sharing using symlinks to work).
Release: WSJT-X 2.5.0-rc6 Release: WSJT-X 2.5.0-rc6
Sept 6, 2021 Sept 6, 2021