
 __       __   ______      _____  ________      __    __ 
|  \  _  |  \ /      \    |     \|        \    |  \  |  \
| $$ / \ | $$|  $$$$$$\    \$$$$$ \$$$$$$$$    | $$  | $$
| $$/  $\| $$| $$___\$$      | $$   | $$ ______ \$$\/  $$
| $$  $$$\ $$ \$$    \  __   | $$   | $$|      \ >$$  $$ 
| $$ $$\$$\$$ _\$$$$$$\|  \  | $$   | $$ \$$$$$$/  $$$$\ 
| $$$$  \$$$$|  \__| $$| $$__| $$   | $$       |  $$ \$$\
| $$$    \$$$ \$$    $$ \$$    $$   | $$       | $$  | $$
 \$$      \$$  \$$$$$$   \$$$$$$     \$$        \$$   \$$
                                                         
                                                         
Copyright 2001 - 2018 by Joe Taylor, K1JT.


		   Release: WSJT-X Version 1.9.1
		           June 1, 2018
		   -----------------------------

This critical bug fix release repairs an unintended restriction in the FT8
DXpedition mode. It supersedes v1.9.0 and must be used for DXpedition Fox
operators.


		   Release: WSJT-X Version 1.9.0
		           May 28, 2018
		   -----------------------------

Changes from WSJT-X Version 1.9.0-rc4 include the following:
- Display in the right text window of MSK144 messages addressed to
  "MyCall" has been restored.

- Fox is not allowed to transmit in any of the default FT8 sub-bands.

- Fox can now work Hounds using compound callsigns.

- Fox can now transmit free-text messages (and any standard FT8 message)
  by using Tab 1 or Tab 2.

- Added a checkbox to enable more frequent programmed CQs by Fox.
  Default is OFF.

- Alt+N keyboard shortcut has been restored.

- MacOS program crash on unexpected decode request has been fixed.


- Several minor bug fixes and added convenience features.

- Hamlib, support for TRXManger added.

- Hamlib, improved support for flrig.


	     	Release: WSJT-X Version 1.9.0-rc4
		         April 30, 2018
		---------------------------------

Changes from WSJT-X Version 1.9.0-rc3 include the following:

- Corrected a number of flaws in Fox and Hound behavior, FT8
  DXpedition Mode

- Decoded CQ calls where a prefix has been used as a suffix should
  have the DXCC entity name assigned correctly in almost all cases

- Improved AFC capability for the wider JT65 sub-modes to help with
  drifting signals

- Better support for macOS using hi-DPI Retina displays

- New UDP message that allows external applications to highlight
  decoded callsigns

- Main-screen geometry and state of the "splitter" setting between its
  two text windows is now properly restored after program restart.

- New simulator jt49sim[.exe] replaces jt4sim and jt9sim

- Correct S/N measurements for the JT9 slow/wide submodes

- Other minor bug fixes

- Updated copy of cty.dat


		Release: WSJT-X Version 1.9.0-rc3
		         March 18, 2018
		---------------------------------

Changes from WSJT-X Version 1.9.0-rc2 include the following:

- Corrected a number of flaws in Fox behavior, FT8 DXpedition Mode

- Allow Hounds to use compound callsigns

- Write debugging information to FoxQSO.txt.

- Fix the "Blue Decode Button" bug

- Allow partial processing of incoming UDP Reply messages so that
  non-CQ/QRZ decodes can be processed. The processing is the same as
  double-clicking the same decoded message within WSJT-X except that
  "Enable Tx" will not be enabled.

- Send DX grid locator to wsjt_status.txt, for use by applications like
  PstRotatorAZ

- Correct the display of DXCC status of KG4 calls

- Updated copy of cty.dat

- Updates to documentation

- Other minor bug fixes

- This release contains updated Hamlib functionality including changes
  to the Yaesu FT-817 back end that allows the uBITx kit transceiver
  to be CAT controlled by WSJT-X.



		Release: WSJT-X Version 1.9.0-rc2
		        February 26, 2018
		---------------------------------

Changes from WSJT-X Version 1.8.0 include the following:

- New FT8 DXpedition Mode to facilitate high QSO rates in pileup
  situations

- Decoding improvements for JT65 mode, including a priori (AP)
  decoding when VHF/UHF/Microwave features are enabled

- Optional Auto-Sequencing in JT4, JT9, and JT65 when
  VHF/UHF/Microwave features are enabled

- Better suppression of low-confidence false decodes generated by AP
  decoding in FT8 mode

- Improved decoding performance for WSPR mode, especially effective at
  LF and MF

- Minor adjustments to auto-sequencing behavior

- More flexible Doppler control features for EME

- Improved waterfall sensitivity for very weak signals

- Automatic real-time forwarding of logged information to N1MM Logger+

- Expanded and improved UDP messages sent to companion programs

- Bug fixes and other minor tweaks to user interface

A primary purpose of this beta release is to allow field testing of
FT8 DXpedition Mode.  Instructions for this mode are posted here:

http://physics.princeton.edu/pulsar/k1jt/FT8_DXpedition_Mode.pdf

Contacts in FT8 DXpedition Mode must use WSJT-X v1.9.0 at both ends of
the QSO.  Please report any anomalous behavior to email list
wsjt-devel@lists.sourceforge.net.  You must be a subscriber in order
to post there.


		Release: WSJT-X Version 1.8.0
		       October 27, 2017
		-----------------------------

This is the full General Availability release of WSJT-X Version 1.8.0.

Changes from WSJT-X Version 1.8.0-rc3 are very minor:

 - Right-click on the Wide Graph now pops up a Context Menu.  Select
   the item *Set Rx & Tx Offset* to complete a one-handed setting of
   both red and green frequency markers.

 - Several clarifications and additions to Tool Tips and the User Guide.


We recommend that all users should upgrade to WSJT-X Version 1.8.0.

If you upgrade from v1.8.0-rc1 it may be necessary to do a one-time
reset of the default list of suggested operating frequencies.  Go to
*File->Settings->Frequencies*, right click on the table and select
*Reset*.


		Release: WSJT-X Version 1.8.0-rc3
		        October 16, 2017
		---------------------------------

Most (but not all) changes since Version 1.8.0-rc2 involve user
control of the increasingly popular FT8 mode.  The "RC3" release also
includes minor bug fixes and updates to the WSJT-X User Guide.  

The following list includes all of the more important changes:

- New optimization of GUI for simplex and split behavior in FT8 mode.

    1. Checkbox "Lock Tx Freq" on main window is relabeled "Hold Tx Freq".

    2. Double-clicking on decoded messages that do not contain your own
    call moves both Rx and Tx frequencies.  If the first callsign is
    your own call, only Rx freq moves.

    3. Double-clicking on decoded messages moves the Rx frequency.  If
    "Hold Tx Freq" is checked, Tx frequency is moved only if CTRL was
    held down.

    4. Clicking on the waterfall moves Rx and Tx frequencies as
    before: Rx only on a simple click, Tx only on SHIFT-click, and
    both on CTRL-click.  This happens even if "Hold Tx Freq" is
    checked. 

- Add a semi-automated "FreqCal" procedure: see *Solve for calibration
parameters* on the Tools menu.

- Improv auto-sequencing behavior: stop and on-frequency
transmission if a called station comes back to someone else.

- Improve S/N estimation in some situations involving QRM.

- Fix an initialization issue with user-modified application fonts.

- Fix an issue with Tx5 message generation with Type 2 compound calls.

- Enhance and improve the ADIF parser of logbook records.  Update
the band limits as per ADIF 3.0.6 specification.

- Increase the FT8 DT range to +/- 2.5 s.

- Do not allow window manager events to close the astronomical data
window.

- Add an "Erase" item to the context (right-click) menu for decoded
text.

- Extend UDP messages with an "off air" boolean field indicating that
the decode was derived from a .WAV file playback rather than an on air
reception.

- Extend reference applications to use the new off air decode message
field.

- Improve performance of FT8 decoder, especially for overlapping
signals.

- Allow specialized use of "x2 Tone Spacing" in FT8 and slow JT9
modes.

- Move "NA VHF Contest Mode" checkbox to main screen.  Query the
operator if d > 10000 km.

- Adjust UI to improve portability with font size changes and between
platforms.

- Extend UDP Reply message to support keyboard modifiers.  This allows
UDP servers to emulate keyboard modified double-clicks on decoded
messages, e.g. ALT+double-click for replying to a CQ or QRZ call
without changing ones Tx frequency offset.

- Update the cty.dat file (21st Sept 2017).

- Ensure that Fast Graph is properly initialized.

- Better handling of worked before and country name display.  Appended
text is added at a fixed column unless the message overlaps in which
case the appended information floats to the right.

- Restore printing of MSK144 decode quality information.

- Display Echo Graph automatically when Echo mode is started.

- Fix a bug that prevented double-click on a JT65 EME-style "OOO"
message from populating the Tx message boxes.

- Fixed behavior with double-click on 'CQ <AA-ZZ> <call> <grid>.'

- Update the "blank line" divider with band ID at 4*TRperiod/5.

- Fix cty.dat lookups that were not honouring exact match flags

- Add some further Copyright protections.

- Fix a bug involving "firstcall contains mycall" but not equal to mycall.

- Fix an issue with editing IARU regions in the working frequencies table.




		Release: WSJT-X Version 1.8.0-rc2
		        September 2, 2017
		---------------------------------

Implementation of FT8 and its auto-sequencing feature is now more
capable and more polished.  The decoder is faster and better: it now
includes signal subtraction, multi-pass decoding, and the use of
accumulated "a priori" information as a QSO progresses.  Sensitivity
extends downward as far as -24 dB in some circumstances.  Overlapping
signals 2 and 3 deep are frequently decoded at essentially the same
frequency.  On a crowded band we sometimes see more than 30 decodes in
a single 15-second interval, over a 2 kHz window.  The North American
VHF Contesting Mode has been extended to include both FT8 and MSK144
modes.

The "RC2" release also includes many minor bug fixes and an
extensively updated WSJT-X User Guide.

Depending on what code revision you upgrade from, it may be necessary 
to do a one-time reset of the default list of suggested operating 
frequencies.  Go to *File->Settings->Frequencies*, right click on 
the table and select *Reset*. 


		Release: WSJT-X Version 1.8.0
		-----------------------------

NEW FEATURES IN WSJT-X Version 1.8.0
------------------------------------

1.  New mode called FT8: sensitivity down to -20 dB on the AWGN
    channel; QSOs 4 times faster than JT65 or JT9; auto-sequencing
    includes an option to respond automatically to first decoded
    reply to your CQ.

2.  New mode for accurate Frequency Calibration of your radio.

3.  Improved performance of decoders for JT65, QRA64, and MSK144.
    MSK144 includes facilities for amplitide and phase equalization
    and an "SWL" mode for short-format messages.
    
4.  Options to minimize screen space used by Main and Wide Graph
    windows.
    
5.  Enhanced management scheme for table of operating frequencies, and
    a new set of default frequencies specific to the three IARU
    Regions.
    
6.  Improved CAT control for many rigs, including those controlled
    through Commander or OmniRig.
    
7.  New keyboard shortcuts to set "Tx even/1st" ON or OFF.

8.  A number of (mostly minor) bug fixes and tweaks to the user
    interface.  For example: new behavior for the audio level slider;
    correctly logged QSO start times in certain situations; correct
    control of FT-891/991 and some other radios via rigctld.

At the time of the v1.8.0-rc1 release the following tasks are yet to
be completed:

1.  Updates to WSJT-X User Guide.
2.  Sample files for FT8.
3.  Enhanced decoding using AP ("a priori") information.
4.  Signal subtraction and multi-pass decoding.
5.  Option to Auto-respond to the weakest responder to your CQ.


Installation packages for Windows, Linux, OS X, and Raspbian can be 
downloaded from the WSJT web site:
http://physics.princeton.edu/pulsar/K1JT/wsjtx.html

Please send bug reports to either wsjtgroup@yahoogroups.com or
wsjt-devel@lists.sourceforge.net.  Such reports should include a full
prescription of steps to reproduce the undesired behavior.  You must
be a subscriber to post to either of these lists.


		Brief Description of the FT8 Protocol
		-------------------------------------

WSJT-X Version 1.8.0 includes a new mode called FT8, developed by K9AN
and K1JT.  The mode name "FT8" stands for "Franke and Taylor, 8-FSK
modulation".  FT8 uses 15-second T/R sequences and provides 50% or
better decoding probability down to -20 dB on an AWGN channel.  An
auto-sequencing facility includes an option to respond automatically
to the first decoded reply to your CQ.  FT8 QSOs are 4 times faster
than those made with JT65 or JT9.  FT8 is an excellent mode for HF
DXing and for situations like multi-hop E_s on 6 meters, where deep
QSB may make fast and reliable completion of QSOs desirable.

Some important characteristics of FT8:

  - T/R sequence length: 15 s
  - Message length: 75 bits + 12-bit CRC
  - FEC code: LDPC(174,87)
  - Modulation: 8-FSK, tone spacing 6.25 Hz
  - Constant-envelope waveform
  - Occupied bandwidth: 50 Hz
  - Synchronization: 7x7 Costas arrays at start, middle, and end
  - Transmission duration: 79*1920/12000 = 12.64 s
  - Decoding threshold: -20 dB; several dB lower with AP decoding
  - Multi-decoder finds and decodes all FT8 signals in passband
  - Optional auto-sequencing and auto-reply to a CQ response
  - Operational behavior similar to JT9, JT65

We plan to implement signal subtraction, two-pass decoding, and use of
a priori (AP) information in the decoder.  These features are not yet
activated in v1.8.0.

We haven't yet finalized what the three extra bits in the message
payload will be used for.  Suggestions are welcome!

	-- Joe, K1JT, for the WSJT Development Team
	
WSJT-X v1.6.0 Release Notice
============================

New Features
------------

WSPR  mode, including  coordinated  automatic band-hopping  and a  new
two-pass decoder that can decode overlapping signals.

EME-motivated features  including JT4  (submodes A-G), Echo  mode, and
automatic Doppler  tracking.  The JT4  decoder is more  sensitive than
that in  the latest  WSJT, and message  averaging is  fully automated.
(Note that submodes  JT65B and JT65C are also present  in Version 1.6,
but the high-sensitivity decoder required for EME with JT65 is not yet
included.)

Tools for accurate frequency calibration of  your radio, so you can be
always on-frequency to within about 1 Hz.

Mode-specific  standard   working  frequencies  accessible   from  the
drop-down band selector.


Maintenance
-----------

A  number  of   corrections  to  the  Hamlib   library,  fixing  balky
rig-control  features.    A  few   unreliable  features   peculiar  to
particular radios have been removed.




WSJT-X v1.5.0 Release Notice
============================

Decoder Performance Improvements
--------------------------------

The most notable change in v1.5.0 is improved speed and quality of the
JT9 and JT65 decoders.  Algorithms have been fine-tuned, and advantage
is taken of the multiple CPUs  found on most modern computers. Overall
speedup factors of  three or more have been attained  since the v1.4.0
release and more signals are being successfully decoded as well.

For  those  interested, here's  a  summary  of  speed tests  of  three
benchmark  versions  of  WSJT-X,  based on  reading  and  decoding  an
identical  set of  10,682 *.wav  files.   The files  were recorded  on
various bands from 160 m to 10 m; the number of decodable JT65 signals
is typically about  5 times the number of JT9  signals.  For each test
the program was set to "JT9+JT65"  mode with "Deepest" selected on the
*Decode* menu.   Other setup parameters  were identical in  all cases.
The test  computer runs Windows 7  and has an Intel  i5-2500 processor
with 4 CPUs.

Columns  labeled "JT9"  and "JT65"  in  the following  table give  the
number of decoded signals in each  mode.  Numbers in the "Time" column
are total  processing time  in seconds,  and columns  labaled "Factor"
give ratios of the corresponding numbers, relative to WSJT-X v1.3.

Program Version  JT9 Factor   JT65 Factor   Time Factor
-------------------------------------------------------
v1.3 r3673      7691  1.000  40831  1.000  14061  1.00
v1.4.0          7693  1.000  41796  1.024  13320  1.06
v1.5.0-rc1      8024  1.043  43946  1.076   4224  3.32

On the  benchmark computer the  decoder in  v1.5.0-rc1 is more  than 3
times faster than the ones in  program releases v1.3 r3673 and v1.4.0.
At the  same time, the number  of decoded signals has  increased by as
much as 7.6%.

Users will notice another consequence  of taking advantage of multiple
CPUs.  JT65  and JT9 decodes in  dual "JT9+JT65" mode are  now done in
parallel, so decodes  are delivered to the Rx activity  window as they
are decoded rather than finishing the current mode before starting the
other mode.   Decoding at the  QSO frequency is still  given priority,
but it may not be the first decode displayed because the first decodes
of the other mode may be produced more quickly.  Dual mode decodes are
now interleaved in the Rx activity window.


UDP Broadcast
-------------

WSJT-X v1.5.0 introduces a new facility that broadcasts status, decode
and logged  QSO information  via the  network. Although  this facility
gives  no obvious  change  to the  application other  than  a few  new
settings options, it should allow cooperating applications to interact
with WSJT-X  far more smoothly  than the current file  based mechanism
which  is prone  to  contention.  The file  access  contention can  be
detrimental to both WSJT-X and the cooperating application whereas the
new broadcast mechanism will not.

Currently the only only cooperating application we know of is JTAlertX
by Laurie VK3AMA and that currently  uses the file based mechanism. We
hope that  Laurie will try the  new mechanism but we  will continue to
provide the file based mechanism as well. We also know of at least one
other application in development for the Apple Mac platform to provide
similar features to  JTAlertX. A contribution for Linux  would also be
most welcome.


Rig Control
-----------

This continues  to be  an area  of development.  There are  still many
untested combinations of equipment since we  have to wait until a user
tries WSJT-X for the first time with each combination before we can be
sure that any defects have been  removed. Hundreds of hours of testing
have been done and we thank those who have reported issues and offered
their time to test fixes where necessary.


FlexRadio & HPSDR Users
-----------------------

Currently the  Hamlib library that  we use  for direct CAT  control of
your  rigs does  not  provide  a fully  functioning  driver for  these
radios. Instead the TS-2000 emulation mode  of these SDRs must be used
as the Hamlib driver for this  has tweaks added to cooperate correctly
with SDRs.  Version  v1.4 of WSJT-X did not work  with these radios in
TS-2000 emulation mode  and at the time we were  not informed of that,
it  appears to  have become  common  knowledge that  using the  TS-480
emulation mode was  the correct procedure, this  is incorrect although
it did work at the time.  The  TS-480 emulation may cease to work in a
future version because it  is due to a defect in  Hamlib that it works
at all. The TS-2000 emulation mode is the correct selection and should
be used with these radios.


Generated Messages for Type 1 and Type 2 Compound Callsigns
-----------------------------------------------------------

This is  a complex  area because  it requires  special action  by both
parties in a  QSO since the automatically  generated standard messages
are not always suitable. We have tried to improve the standard message
generation and recognition  along with better recognition  of own call
messages. As before it is imperative that operators take note of their
QSO partners responses  and be prepared to manually  edit replies when
communicating with compound callsign stations.


                                                         

WSJT-X v1.4.0 Release Notice
============================

Migration of User Files
-----------------------

This  release includes  a new  install mechanism  that separates  user
files  from installation  and  program files.  This  means that  going
forward  upgrades  will be  seamless  with  user files  preserved  and
automatically  carried forward  without  user  intervention. For  this
release only it  is necessary to move your user  files manually if you
wish to  preserve them. The locations  of user files have  changed and
now vary depending  on the installation platform.  The following notes
are intended  to guide you  in moving your user  files, this is  a one
time action.

On Microsoft Windows:

The  new  location  for  user  files is  %LOCALAPPDATA%  which  is  an
environment variable defined automatically by Windows, you may use the
environment variable  any place  where a file  path would  normally be
used e.g.   in the location entry  bar in Windows File  Explorer or in
arguments to command line programs from a Command Prompt window.

On Linux and other Unix systems:

The new location for user files ~/.local/share

On Mac:

The new location for user files is ~/Library/Application\ Support

In all cases  the files are stored in a  subdirectory which by default
is WSJT-X

In the case of users who run  multiple instances of WSJT-X on a single
computer   there  are   different   user  file   locations  for   each
instance. The non-default locations are in sibling subdirectories each
suffixed by  the rig name  argument passed  to WSJT-X at  startup (See
Running Multiple Instances below).

The user  files that you  may wish to  migrate from older  versions of
WSJT-X are:

  ALL.TXT
  CALL3.TXT
  wsjtx.log
  wsjtx_log.adi

The format of each  of these files is unchanged in  WSJT-X v1.4 so all
that is  needed is to  copy them to the  new location.

For example on  Microsoft Windows assuming a  WSJT-X v1.3 installation
in C:\WSJT\wsjtx-1.3, using a command prompt window:

  copy C:\WSJT\wsjtx-1.3\ALL.TXT %LOCALAPPDATA%\WSJT-X\
  copy C:\WSJT\wsjtx-1.3\CALL3.TXT %LOCALAPPDATA%\WSJT-X\
  copy C:\WSJT\wsjtx-1.3\wsjtx.log %LOCALAPPDATA%\WSJT-X\
  copy C:\WSJT\wsjtx-1.3\wsjtx_log.adi %LOCALAPPDATA%\WSJT-X\

On Linux:

  cp ~/wsjtx-1.3/ALL.TXT ~/.local/share/WSJT-X/
  cp ~/wsjtx-1.3/CALL3.TXT ~/.local/share/WSJT-X/
  cp ~/wsjtx-1.3/wsjtx.log ~/.local/share/WSJT-X/
  cp ~/wsjtx-1.3/wsjtx_log.adi ~/.local/share/WSJT-X/

On Mac:

  cp ~/wsjtx-1.3/ALL.TXT ~/Library/Application\ Support/WSJT-X/
  cp ~/wsjtx-1.3/CALL3.TXT ~/Library/Application\ Support/WSJT-X/
  cp ~/wsjtx-1.3/wsjtx.log ~/Library/Application\ Support/WSJT-X/
  cp ~/wsjtx-1.3/wsjtx_log.adi ~/Library/Application\ Support/WSJT-X/

If you have a customized cty.dat  file installed, then that too should
be copied to the new directory.


Settings
--------

WSJT-X v1.4 introduces a new settings  regime. There is no facility to
migrate  settings  from  prior  versions  and  copying  the  wsjtx.ini
settings file to  the new user files location will  not carry over any
useful information.   The new settings  dialog is very  different from
prior versions but it is intuitive and will not take long to configure
for you equipment and preferences.


Running Multiple Instances
--------------------------

For users  with multiple radios  or multi-receiver SDRs  WSJT-X offers
multiple  instance  support.   Prior  to  WSJT-X  v1.4  this  involved
installing the application multiple  times in separate locations, this
is  no longer  necessary and  multiple instances  MUST be  run from  a
single installation. This is possible  as user and other writable data
files are stored in a unique location for each instance.

WSJT-X  has  a  new  command line  option  that  coordinates  multiple
instances called --rig-name (-r for  short) which allow you to specify
a unique key for each instance.  If no --rig-name option is supplied a
default  location is  used  for  writable files  as  specified in  the
Migrating of User  Files section above. If a key  is provided then the
same key  must be used  every time that instance  is started so  as to
associate it with the correct data files.

If the  unique key were ft-857  then you must start  WSJT-X using that
key e.g.

   wsjtx --rig-name=ft-857

and the data files will be stored in a directory "WSJT-X - ft-857" for
example on Windows:

   "%LOCALAPPDATA%\WSJT-X - ft-857\"

Multiple instance support  may also be used if more  than one operator
uses the same computer with their own call signs, or a single operator
who  operates  in multiple  locations  with  different call  signs  or
wishing to maintain separate log files for each location.


Known Issues
------------

Editing station details in the  frequencies tab of the settings window
may not  save the changes to  the settings file. Updates  will show in
the settings tables until application exit  but may not be used by the
application.  A workaround  is  available, delete  the  whole row  and
re-enter  the details  rather  than editing  individual fields.   This
defect is resolved in the next release (v1.5).




			WSJT-X ChangeLog
------------------------------------------------------------------
October 7, 2013: Version 1.2.1, r3590

Windows Vista has a broken rate converter which gets invoked when an
input audio stream at 48kHz sample rate is requested.  To correct this
problem, WSJT-X revision 3590 reverts to input sampling at 12000 Hz by
default when run under Vista.  All other platforms use 48000 Hz sample
rate for both input and output.

October 3, 2013: Version 1.2.1, r3587

1. Input sample rate is now uniformly 48000 Hz on all supported
platforms.

2. Properly handle DNS lookup failures for PSKreporter site.

3. Clear the logbook "Name" field after logging a QSO.

4. Add tuning paramegters for better audio performance on some machines.

5. Improved handling of displayed text when larger fonts are used.

6. Fix message truncation when a callsign is unexpectedly long.

7. Fix the "stuck decode" bug experienced by some users.

8. Remove the bogus error message sometimes printed upon program exit.


August 17, 2013: Version 1.2, r3563
------------------------------------
Changes since revision 3556 include the following:

1. Fix bug preventing program restart with "+2 kHz" already set.

2. Fix bug causing problems if program is installed in a directory
with embedded space(s) in the name.

3. Fixed an audio input problem (seen on some computers) by moving
audio input to the audio thread, running at High Priority.

4. Re-enabled the capability for running multiple instances.

August 16, 2013: Version 1.2, r3556
------------------------------------
Changes since code revision 3520 include the following:

1. Audio I/O now uses Qt's built-in multimedia library inatead of
PortAudio.  User options are provided for input (mono/left/right) and
output (mono/left/right/both), and a digital attenuation slider to
control Tx audio level.  In "Split Tx" mode, Tx signals are now
cleaner because Tx audio is constrained to the range 1500 - 2000 Hz.

2. Windows reports to PSKReporter now use our own code, rather than
PSKReporter.dll.

3. Many new optional palettes for waterfall colors, selectable from a
drop-down list on the Wide Graph window.

4. Fixed bug causing misalignment of Cumulative spectrum when start
frequency is not 0.  Decoding begins at start frequency rather than 
0 Hz.

5. Tx message #6 is now selected at program startup.

6. Faster logbook lookup when "Show DXCC entity and worked B4 status"
is selected.  Also better ADIF compatibility and better text alignment
in left and right text windows.

7. Improved Tool Tips for on-screen controls.

8. Various other code changes for uniformity across platforms, ease of
maintenance, and good programming practice.  (Most of these will be
invisible to users.)

9. Program is now built with the latest Qt, version 5.1.

10. Updates to User's Guide.


August 2, 2013: Version 1.1.1, r3520
------------------------------------
Improvements since Version 1.1, r3496 include the following:

1. New organization of the "Band Settings" tab on the configuration
screen, including antenna descriptions for PSK Reporter on a "per
band" basis.

2. Full control is provided for DTR and RTS lines on the serial port
used for CAT control.

3. Optional user control of font sizes.  Use a text editor to create a
file "fonts.txt" in the WSJT-X installation directory.  It should have
four numbers on a single line.  The first two are point size and
weight (0-100 scale) for GUI labels, the next two are point size and
weight for the decoded text windows.  For example, try "9 50 12 100".

4. New user control at bottom of Wide Graph window sets the start
frequency of the waterfall scale.

5. New optional palette "gray1" for the waterfall.

6. The small colored button just right of the "+2 kHz" checkbox now
shows the letter "S" if "Split Tx" has been checked.

7. New user option appends DXCC country name and "QSO B4" status to
decoded CQ messages.

8. Setting of dial frequencies through Commander should should now
be aware of local convention for decimal separator.

9. Several minor bug fixes.

10. Refactoring of code to move audio input.output into the GUI thread.
(Should be invisible to users).

11. Updated credits displayed in the "About" window.

12. Updated User's Guide.


July 19, 2013: Version 1.1, r3496
---------------------------------
This is a full release of WSJT-X Version 1.1.  It provides an easy way
to make QSOs in both JT65 and JT9 modes.  

Changes from the most recent beta release, r3487, include the
following:

1. Significant optimizations of the JT9 decoder, providing speed 
improvements up to 5 times.

2. Frequency-setting through DX Lab Commander now works properly at
non-integral kHz frequencies.

3. A new meter widget has been added (thanks to PY2SDR).

4. Implementation of "multiple instances" has been completed and
tested (thanks to KK1D). 

5. Several minor bug fixes.


July 15, 2013: Version 1.1 Beta Release, r3487
----------------------------------------------

Version 1.1 of WSJT-X is "bi-lingual" -- it transmits and receives
both JT9 and JT65 signals, switching between modes automatically as
needed.  The maximum displayed bandwidth has been increased from 1 to
5 kHz.  If your receiver has an upper-sideband filter at least 4 kHz
wide, on most bands you can have all the JT65 *and* all the JT9
activity on screen at once, available for making QSOs.

Other improvements since v1.0, r3323 include the following:

1. CAT control via DxLab Commander.

2. Improved GUI appearance, especially on Linux and OS X.

3. Compilable with Qt5 as well as Qt4.

4. Fixed occasional program crashes caused by receiving a message in
the form "call1 call2" (with no grid, report, etc.).

5. Improved handling of audio device selection in Linux.

6. Log QSO frequency, instead of dial frequency only.

7. Added Tx Power to ADIF log information.

8. Added option to retain between QSOs the Power and Comments fields
for ADIF and wsjtx logs.

9. Added optional antenna description for PSK Reporter.

10 Fixed a bug in handling of logged grid locator when none was
available on the double-clicked line.

11. Fixed a bug that caused small differences in the lengths of
transmitted symbols.  This leads to improved decoding.

12. Tx message (highlighted in yellow) now includes a mode flag and
the audio offset from dial frequency.

13. Added a spinner control for Rx Freq.

14. New on-screen button "Lock Tx=Rx" locks Tx and Rx frequencies
together.

15. Allow Windows COM port number greater than 9.

16. Don't clear DxGrid when user double-clicks on a message with no
grid, if the message's Tx call is same as DxCall.

17. Double-click on yellow Tx message now sets frequency, but does
nothing else.

18. Rationalized the logic of the CAT control indicator button. Now
colored grey/green/orange/red -- see User's Guide.

19. Operating in "Split Tx" mode is optional (but with most radios is
necessary if you will transmit at more than 2.7 kHz above dial
frequency).

20. The correct TxMode label now appears on program startup.

21. "Transmitting..." message in ALL.TXT now has the correct TxMode.

22. File wsjt_status.txt includes TxMode.

23. F4 clears Az, Dist, and the Tx message boxes.

24. You can decode JT9 signals in the JT65 frequency range, and
vice-versa, by double-clicking the signal in the waterfall.

25. Better logic for enabling/disabling the TestPTT button.

26. Do not call getFreq() when the TestPTT button is clicked and
PTTmethod is via CAT control.

27. New cold-start default frequencies are set at reasonable values
for JT65.  A "+2 kHz" checkbox is provided for quick setup in JT9-only
mode.

28. Default macros added as simple examples.

In case you wondered about r3482, which was posted for a few hours 
only...

It was repleced by r3487 in order to fix two bugs.  Revision 3487 
uses more sensible logic for what to do when the "DX Grid" entry is 
edited, and it fixes a bug that could prevent program restart if 
you had exited the program with "+2 kHz" checked.

May 30, 2013: Version 1.0, r3323
--------------------------------

With this release of WSJT-X Version 1.0 we include a few (relatively
minor) enhancements in response to user requests, as well as some
program polishing and cleanup.  Active program development will
continue, but new releases will become less frequent.

1. New option on the Setup menu: "Tx freq locked to Rx freq".

2. Double-click on a decoded "73" message now sets Tx5, rather than Tx6.

3. New keyboard shortcuts: Alt+1 through Alt+6 set the next Tx message 
   at the corresponding number.

4. PTT control via Ham Radio Deluxe has been imnplemented and tested.

5. "Tool Tips" are now provided for most on-screen controls.

6. Under Linux and OS X, listings of available audio devices and APIs
   have been corrected.

7. Tab order among GUI controls has been cleaned up.

8. Updates to the WSJT-X User's Guide.


May 22, 2013: v0.99, r3297
--------------------------

1. CAT control via Ham Radio Deluxe is now available.  For setup
   details see item #5 at the top of page 6 of the updated WSJT-X
   User's Guide.

2. Submodes JT9-5, JT8-10, JT9-30 have been de-activated.  (As far as I
   know, nobody was using them.)  This action makes the program smaller 
   by some 150 MB and able to run effectively on some older computers.

3. Bizarre ordering of COM port numbers on the drop-down list has been
   corrected, and suitable serial ports added to the list displayed in
   Linux.

4. Gray bar between decoding periods now contains a dashed line.

5. Corrected a bug that prevented use of Setup | Configuration with
   no existing wsjtx.ini file.

May 17, 2013: v0.95, r3278
--------------------------
1.  Double-clicking on a decoded text line in "Band Activity" window
    now copies the line into the "QSO Frequency" window if it was not
    already there.

2.  Option "Color highlighting in left window" removed from Setup
    menu.  Highlighting is now always done.

3.  Positions of "QSO Frequency" and "Band Activity" windows have been
    swapped.  

4.  F4 was restored to its previous use; F5 is now used to display
    Special Mouse Commands

5.  Small square between Band selector and Frequency readout was made
    a control button.  Orange indicates one-way CAT control from
    program to radio, red indicates bi-directional control.  Clicking
    the orange button causes a one-time readout of dial frequency.

6.  If Save=None, the last recorded file is deleted on program exit.
    This prevents unwanted accumulation of files in the Save
    directory.

7.  Status-bar messages were re-arranged in a more logical order.

8.  Tx signal report was added to wsjtx_status.txt (for JT-Alert)

9.  More informative labels were placed on the "Tab 2" GUI controls.

10. Better default scaling for the "Cumulative" spectrum.

11. New algorithm for identifying JT9 signals to send to decoder,
    resulting major improvements in decoder speed.

12. Bug fixes:
     - Incorrect displayed frequencies for JT9-2 signals
     - Infinitely repeated "Error rigOpen -1" messages
     - User tries to open CAT control using busy or nonexistent serial port

13. Many updates to the User's Guide


May 2, 2013: v0.95, r3251
-------------------------

1. The "band change" function is executed whenever the Band combobox
   is activated, even if the selected band has not changed.

2. The program does not set rig mode.  That task is left to the user.

3. Time interval for polling rig frequency is now a user parameter on
   the setup screen.  I set mine to 1 second, which works fine with
   the Kenwood TS-2000.  Set it to 0 if you want no polling for
   frequency (which means unidirectional CAT control from program to
   radio).  Choose something like 10 s for the K3.

4. Much new work on the WSJT-X User's Guide, which is approaching its
   final form for Version 1.0.  Please read it and tell us about
   anything you find unclear or missing!

These changes address nearly all of the CAT issues found by a few
users -- those with K3, IC-746, IC-706, in particular.  

One additional piece of advice when running WSJT-X in Windows: connect
and turn on the radio and any interface equipment before starting
WSJT-X, and exit the program before turning such equipment off.

April 29, 2013: v0.95, r3243
----------------------------

1. Now has bi-directionsl CAT control using direct calls to hamlib
   functions.  Highlights displayed dial frequency with red background
   if frequency differs from nominal for the selected band by more
   than 100 kHz.  (Is there a more useful or logical condition to
   flag?)  Small red square between Band selector and Dial Frequency
   display to indicate that CAT control is active.  Mode is set to USB
   on startup.  (Note: CAT control diagnostics are presently rather
   rudimentary, we're still working on this.  Feedback is welcome!)

2. New controls on Setup | Configuration screen: 
   - RTS/DTR OFF -- needed by K2 and maybe other radios
   - Data / Mic -- select CAT-control PTT type
   - Test CAT Control -- try settings before returning to main screen
   - Test PTT -- try settings for toggling PTT On/Off

3. Help menu now provides displays of Keyboard Shortcuts (quick access
   via F3) and Special Mouse Commands (F4).

4. Option "Setup | Advanced | Allow multiple instances" enables the
   use of more than one instance of WSJT-X for special applications.
   (The program must be copied into and run from different
   directories.)

5. No posts to PSK Reporter if band was changed during the reception
   period.

6. Improved behavior of Tune button.

7. Improved inter-process communication between WSJT-X and JT-Alert-X.

8. Better interaction between "Report" spinner control and Tx messages.

9. Removed the NB checkbox and slider.  (Has anyone found these useful?)

10. New buttons on main window: "Tx=Rx" sets Tx frequency to current
    Rx frequency; "Rx=Tx" does the opposite.

11. Log QSO confirmation window is now "non-modal": you can keep it 
    open and still access controls on the main window.

12. Tab-order has been rationalized on most screens.

13. Dial frequency and mode written to file ALL.TXT.

14. Double-click on decoded line sets Tx message #3 if message has
     the form "MyCall Call2 rpt".

15. Bug causing occasional, seemingly unpredictable program crashes
    has been fixed.

16. The WSJT-X User's Guide is somewhat closer to being complete.  User
    feedback on the Guide will be most welcome.  What is unclear?  What
    is missing?

April 17, 2013: v0.9, r3195
---------------------------
1. Sorry, the CAT control changes in r3187/3188 were a dismal failure
in many stations, and they introduced other bugs as well.  This revision
goes back to uni-directional CAT control: the program can set the 
radio's dial frequency and do T/R switching, but that's all.  The band
setting is not reset on program startup.

2. Logic for the Tune button has been corrected.

3. For Linux compile-it-yourself enthusiasts: the interface to 
PSK Reporter is now working undel Linux.

April 16, 2013: v0.9, r3188
---------------------------

1. CAT control now reads and follows changes in radio's dial
frequency.  Readout gets red highlighting if radio is on wrong band.
On program restart, band is reset to the last selected band.

2. New "Tune" button generates an unmodulated carrier.  Toggle button
a second time to turn Tx off.

3. Added labels at top of "Tab 2" and enlarged the text entry fields.

4. Fixed the broken logic for "Runaway Tx watchdog".

5. Fixed "Prompt me to log QSO" so that it no longer requires also
setting "ID after 73".

6. Additional changes of (eventual) interest to Linux users.  Code for
sending spots to PSK Reporter now in place.

April 13, 2013: v0.9, r3166
---------------------------
1. Option to send Tx messages (highlighted in yellow) to the QSO window.

2. Prevent starting a transmission more than 24 sec into a Tx period.

3. "Setup | Options" changed to "Setup | Configuration".

4. Type Alt-V to save the most recently completed Rx file.

5. Fixed bug that truncated Rx messages to 16 characters.

6. Internal program changes that should provide better user diagnostics
when necessary at program startup.

April 11, 2013: v0.9, r3157
---------------------------
1. Maximum size of several window areas increased to accommodate system 
fonts set larger than default.

2. New behavior of Erase button: click once to erase the left (QSO) window,
twice to erase both decoded text windows.

3. Keyboard shortcuts:
   Alt-D: decode again at QSO frequency (same as clicking the Decode() button)
   Shift-D: do another full decode in both windows
   Alt-E: Erase()
   Ctrl-F: Edit the free text message box
   Alt-H: Halt Tx()
   Alt M: Monitor()
   Alt-N: Enable Tx()
   Alt-Q: Log QSO()
   Alt-S: Stop()

4. New Setup options: "Tx disabled after sending 73" and "Runaway Tx 
watchdog".

5. Fixed bug in saving the "report received" for logging purposes.

6. Corrected the logic for "Runaway Tx watchdog".

7. Fixed bug that truncated characters 17 and 18 of decoded messages.

April 10, 2013: v0.9, r3151
---------------------------
1. Blank line between decoding periods is now in the right-hand 
text window, where it should be.
2. Decoding range defined by fMin and fMax is now enforced.

April 9, 2013: v0.9, r3143
--------------------------
This minor release restores the decoding speed of earlier revisions
and corrects a bug that prevented sending CW ID.

April 9, 2013: v0.9, r3142
--------------------------

This version of WSJT-X has a number of significant changes.  Please
read the following notes carefully.  Also -- even if you are already
familiar with WSJT-X -- be sure to read the updated WSJT-X User's 
Guide at 
http://www.physics.princeton.edu/pulsar/K1JT/WSJT-X_Users_Guide.pdf ,
especially pages 3 and 4.

Changes since v0.8 r3118 include the following:

1. There are now two scrolling windows for decoded text.  The left
window contains decodes only from close to the designated QSO
frequency.  The right window includes signals over the full decoding
range.

2. An alternative set of controls is now available for generating and
selecting Tx messages.  Some may find these more convenient to use
than the Tx1 through Tx6 message boxes.

3. A number of new user options are available on the Setup menu:
   - Blank line between decoding periods (right window only)
   - Clear DX Call and DX Grid after logging QSO
   - Display distances in miles
   - Runaway Tx watchdog
   - Background colors for left window
   - Double-click on decoded message sets Tx Enable

4. New or changed on-screen features
   - "Tol" replaced by fMin and fMax on waterfall screen (see User's Guide)
   - Spinner control for signal report
   - On waterfall scale: green marker for Rx freq, red for Tx. blue
     for decoding range

5. New behavior
   - "CQ DX" is now treated properly when decoded line is double-clicked
   - Message formate for compound callsigns (e.g., PJ4/K1ABC, G4XYZ/P)
     are now handled correctly.  (Some restrictions apply, and will
     be spelled out in the completed User's Guide.)
   - Decode button now causes a decode only at the specified Rx frequency.
   - Click on waterfall spectrum sets Rx freq; double-click also invokes
     decoder (as though Decode button had been clicked).  CTRL-click moves
     both Rx and Tx freqs.
   - Amplitude at end of transmission is ramped down to prevent a final
     key click.

6. The following bugs have been fixed:
   - Logic error in decoder
   - Certain non-standard Tx messages could cause a program crash.
   - Certain (rarely used) messages did not pack/unpack correctly

April 2, 2013: v0.8, r3118
--------------------------
1. Improved interface to program JT-Alert, by VK3AMA.

2. The LogQSO confirmation dialog no longer blocks the GUI updating
   process.

3. A blank line with gray background separates the decoded text lines for
   each new invocation of the decoder.

4. New suggested default frequencies: 5.357, 18.104, and 24.918 MHz.  
   Be sure to edit these entries on the 'Default Frequencies' tab of the
   Setup screen.  (When you have done this once, the new values will be
   remembered.)

5. The LogQSO button now does nothing is the 'DX call' entry field is
   blank.

6. Several minor bugs were fixed.


March 27, 2013: v0.8, r3113
---------------------------
1. Bug fix: VOX control of T/R switching now works.

2. Potentially useful error messages now appear when CAT control
   has failed.

3. Added an instruction on the Log QSO confirmation screen.

4. Clear the DXcall and DXgrid entries after logging a QSO.

March 26, 2013: v0.8, r3112
---------------------------

Edson Pereira, PY2SDR, recently became an active contributor to this
open-source project.  Edson and I have been very busy over the past
few days!  WSJT-X revision 3112 has many changes and new features.

1. The GUI layout has been adjusted and optimized.

2. CAT control is now operational, offering optional control of your
   radio's dial frequency and T/R status.  Go to the Setup | Options
   window to select the necessary parameters.

3. CW ID has been implemented.  You can have your ID sent after a fixed 
   time interval, or automatically when you transmit a "73" or free
   text message.  

4. Default dial frequencies are available for each band on a new tab
   on the Setup | Options window.  Please note: some of these
   frequencies are probably wrong!  You can edit them as needed.  
   (Please let us know if the original values are inconsistent with
   actual practice on any band.)

5. Several new options appear on the Setup menu.  Try them!

6. Azimuth and Distance information is displayed whenever a valid grid
   locator appears in the "Dx Grid" box.

7. The decoder has again been adjusted for better compromise between
   sensitivity and decoding time.  
   
8. The User's Guide is out of date, and needs work.  We hope to get to
   that task soon.

9. Very important for some would-be users: WSJT-X now runs properly
   under Linux.  We haven't made a package yet, so for now you must
   compile your own.  If you don't know how, we hope to be set up
   to make packages before too long.

10. If you know someone who might be interested in contributing to the
    development of WSJT-X and related projects, please send him/her
    our way!  We're especially looking for someone interested in
    producing packaged Linux distributions -- for example, *.deb or
    *.rpm packages, but other programming help is also wanted.

As always: please report bugs, and don't be bashful about sending us
your feature requests!

March 22, 2013: v0.7, r3071
---------------------------
1. Correct a bug that (still) allowed display of previous decodes
when nothing new was decoded.

2. Add a user confirmation screen activated when you click Log QSO.
This lets you edit or add information before it is written to the
ADIF file.

3. Tx message macros and now available.  Configure them on the Setup 
window.  They are invoked as a pop-up menu by right-clicking on the 
Tx5 message window; then select the desired message by left-clicking 
on the desired message. 

March 20, 2013: v0.7, r3063
---------------------------
1. Add Frequency to the generated ADIF records.

2. Correct a decoder bug that led to duplication of previous output 
when nothing new was decoded.

March 19, 2013: v0.7, r3061
---------------------------
1. Allow Windows COM port numbers up to 99.

2. Replace status files wsjtx_qrg.txt and wsjtx_txcall.txt with
a single file, wsjtx_status.txt.

3. Combine wsjtx_rx.log and wsjtx_tx.log into a single file ALL.TXT.

4. "Log QSO" now writes a file in ADIF format.

5. Starting to implement popup macros for Tx message #5.

6. Big improvement in decoding speed.

*** More changes to come!  Please report any problems, especially
*** with the ADIF-format log.

March 12, 2013: v0.6, r3046
---------------------------
1. Decoded calls can now be uploaded to the PSK Reporter web site. 
Check the box "Enable PSK Reporter" on the Setup screen, and go to
http://pskreporter.info/pskmap.html to see the spots.  Be sure to
enter your "Dial Frequency (MHz)" at lower right of the Wide Graph
window.  (Rig control features are yet to come...)

2. Added some interfaces to permit use with the program JT-Alert,
by VK3AMA.  Look for this capability in the near future. 

March 6, 2013: v0.5, r3038
--------------------------
1. Selection of Current/Cumulative/JT9Sync for the 2d spectral display
changed to a combobox.

2. Double-click on decoded text does not change frequency settings
if first decoded call is MyCall.

March 1, 2013: v0.5, r3026
--------------------------
1. The horizontal scale of 2d spectra (e.g., the "red curve") is now
correct when the user has selected FFT Bins/Pixel > 1.

2. Double-clicking on a decoded text line now selects the second
callsign independent of exactly where one has clicked on the line.  
In addition, it sets the selected frequencies (both Tx and Rx) to
the frequency of the decoded transmission.

December 11, 2012: v0.5, r2791
------------------------------
1. Messages of the form "CQ DX K1ABC" are now supported.

November 30, 2012: v0.5, r2788
------------------------------
1. A bug was introduced when support for positive signal reports was
added.  It could cause a program crash when certain free-text messages
were composed for transmission.  The bug has been fixed.

2. In the slower JT9 sub-modes, the UTC listed on decoded text lines
has been changed to the start time of the Rx sequence, rather than the
time of the final minute.

3. The waterfall's "Auto Zero" button had no function, and has been
removed.

4. In previous revisions the installer put a number of DLLs into
the Windows system directory, normally C:\Windows\System32.  This
revision installs the DLLs to the WSJT-X installation directory.


November 29, 2012: v0.5, r2786
------------------------------
1. In r2783, the companion program jt9.exe (started automatically when
you start WSJT-X) was a CPU hog for no good reason.  This was an
oversight on my part, and the bug has been corrected.

2. The program should now run correctly if installed in a directory
whose name contains embedded spaces.  (Under Vista and Win7, however,
it's still not a good idea to install WSJT-X into C:\Program Files,
because of restricted write permissions there.)

3. In r2783 and earlier, stopping a transmission by toggling to "Auto
OFF" would terminate Tx audio and release PTT almost simultaneously,
possibly hot-switching your T/R relay(s).  This has been corrected so
that proper sequencing takes place.


November 28, 2012: v0.5, r2783
------------------------------
This revision has an unusually large number of changes relative to the
previous release, v0.4 r2746.  These changes include:

1. PTT control via COM ports COM10 and higher is enabled.

2. Improved decoder performance: higher speed as well as better
chances of success.  Moderate amounts of frequency drift are detected
and compensated.  Computed S/N values are more reliable.  Time offsets
from -2.5 to +5 s are now supported, which makes JT9 usable for EME.
(EME tests on 144 MHz have been successful, and performance on that
propagation mode appears to be good.)

3. Tx Frequency now tracks the selected QSO Frequency (unless you hold
down the CTRL key when setting QSO Frequency via mouse-clicks or the
F11/F12 keys).

4. Decoded text containing "CQ " is highlighted with green background;
text including "MyCall" is highlighted in red.

5. In previous versions, signal reports were required to be in the
range -30 to -01 dB.  In v0.5 r2782 the range has been extended to -50
to +49 dB.  There is backward compatibility for the range -30 to -01,
but reports in the range -50 to -31 and 0 to +49 will NOT be decoded
correctly by previous program versions.  It is important to upgrade!

6. Items "Save Synced" and "Save Decoded" are now implemented.

7. UTC Date, JT9 submode, and a parameter related to the decoding
procedure are now included in file wsjtx_rx.log.

8. Editing of Tx messages (in any of the six Tx message boxes) is
complete when you hit "Tab" or "Return".  The message is then parsed
and converted to the form in which it will be displayed if decoding is
successful.  Free-text messages are trimmed to 13 characters and
highlighted with a pink background.

9. The most recent transmitted message is displayed in the right-most
label on the status bar.  This can be useful if you have lost track of
where you were in a QSO.

10. By default, the program now starts with Monitor ON.  An option on
the Setup menu allows you to select "Monitor OFF at startup".

11. Better scaling is provided for the red "JT9 Sync" curve.  Note
that JT9 signals in the active sub-mode should appear in this plot as
a bump of width equal to the total signal bandwidth, with a narrow and
slightly higher bump at the left edge.  The narrow bump is the
frequency of the Sync tone, which is defined as the nominal frequency
of the JT9 signal.

12. Basic QSO information is now written to file wsjt.log when you
click the "Log QSO" button.

13. The WSJT-X User's Guide has been updated.

14. Other known bugs have been fixed.  There will probably be new
ones!  When you find one, or if you know of any old ones that have NOT
been fixed, please send me email.

Summary of Present Status
----------------------------------------------------------------------
I believe that WSJT-X is now a stable and very usable program.  Many
thousands of QSOs have been made with JT9-1, mostly at HF -- I have
made nearly 100, myself.  Also a number of QSOs have also been
completed at MF, and successful tests have been made on 2m EME, etc.
A number of QSOs have also been made with JT9-2.

As far as I know the slower modes (JT9-5, JT9-10, and JT9-30) also
work correctly.  (Certainly they do in my laboratory test setup.)
Most people will find these modes too slow for "everyday" use, and
they require high frequency stability.  It remains to be seen whether
they will be widely used.

An alternative approach to obtaining improved sensitivity would be to
give the decoder an ability to average over several successive
transmissions.  For example, the average of five JT9-1 transmissions
could reach a decoding threshold around -32 dB, only 2 dB worse than a
single JT9-5 transmission.  Because of QSB, the shorter transmissions
may actually succeed in less total time.  Stability requirements would
be those of JT9-1, much less stringent than those of JT9-5.

Program development is not finished, by any means.  I will be grateful
for your feedback on performance issues, as well as your "wish-list"
of features to be added.  As always, example recordings of files that
you think should have decoded, but did not, will be much appreciated.

November 16, 2012: v0.4, r2746
------------------------------

Changes from v0.4 r2731 include the following:

1. Valid signal reports are now generated by double-clicking on a
callsign in the decoded text window.

2. Consecutive spaces in a Tx message are now collapsed into a single
space.

3. Decoding speed is much improved, especially when strong (possibly
non-JT9) signals are present and "Tol" is set to a relatively large
value.

4. Scaling of the "JT9 Sync" plot (red curve) is more reasonable.

5. Layout of widgets on the main window has been improved.

6. Several minor bug fixes. 

November 14, 2012: v0.4, r2731
------------------------------

A number of known bugs have been fixed, and the JT9 decoder is
significantly improved.  Among other improvements, the program is now
much less fussy about timing issues.

November 6, 2012: v0.3, r2717
------------------------------

Changes from r2713 include the following:

1. A bug in the decoder that led to erratic behavior (failed decodes)
under certain conditions has been corrected.  Decoding is now much
more reliable.

2. A valid algorithm is now used to calculate S/N values for received
JT9 signals.

3. The header format of recorded *.wav files has been corrected.
These files will now play correctly in Windows programs that expect
the standard header.

November 6, 2012: v0.2, r2713
------------------------------

Changes from r2711 include the following:

1. Updates to the Quick-Start User's Guide,
http://www.physics.princeton.edu/pulsar/K1JT/WSJT-X_Users_Guide.pdf

2. Double-click on waterfall now sets Tol to a reduced
(mode-dependent) value.

3. Tol is saved and restored on program restart.

4. A "digital gain" slider was added next to the green-bar audio level
indicator.  With the slider at mid-range, the scale reads correctly in
dB above the least significant bit of 16-bit audio data.

5. There is now a test that rejects at least one type of data that is
sufficiently corrupt to cause Eddie's best friend, the message
"15P6715P67WCV".

6. Several minor tweaks to improve decoder performance.

7. The program now starts with Monitor OFF.  You must click Monitor to
start accepting audio.  For some types of testing, this may be an
advantage.  This startup condition may be changed again, in the
future.

October 31, 2012: v0.2, r2711
-----------------------------

Three significant changes since r2706:

1. Three options are now provided on the "Decode" menu, controlling
the "depth" of the decoding process.  For most purposes I suggest you
should use "Normal", but feel free to experiment with the others.

2. Decoding of multiple signals in one Rx interval has been improved.

3. Handling of strong signals has been improved. 

October 309, 2012: v0.2, r2706
------------------------------

Changes since r2702 include the following:

1. The problem with "ghost" signals is fixed.

2. A problem causing very long decode times under certain
circumstances has been fixed.  Please note: decode times on any recent
PC should no more than a few seconds!

3. I have re-directed the program's fatal error messages so they will
be sent to the command-prompt window from which you started the
program. Please send me full reports on any such messages you observe,
preferably with details on how to reproduce the problem.

#########################################################################

Some additional information ...

1. Yes, the JT9 modes require good stability in all system
oscillators.  The present JT9 bdecoder does not attempt to track
frequency drifts. Such capability will be added, however.  We have
been using digital modes for EME for nearly ten years now, at 144 MHz
and higher.  There are more than 1000 WSJT users on EME, using all
kinds of rige.  We have learned how to deal with reasonable rates of
drift.  Surely if we can do these things at VHF, we can do them much
more easily at MF and LF.

2. If you're sure that you have seen degraded JT9 performance because
of frequency stability issues, don't just complain on the LF
reflector. Document your case and send me an example file with a
drifting JT9 signal.  Making WSJT-X and JT9 better is partly YOUR
responsibility!

3. In other ways as well, test files are needed.  I can make many
tests myself, but I can't foresee all the problems others will have.
That's what the "Save All" function is for!  In these early tests,
always run with "Save All" checked, just in case you will want to
refer back to something that happened.  You may want to send me the
file in question.  You can always clean out your "Save" directory by
using "File | Delete all *.wav files in SaveDir".  I need good
examples of signals that fail to decode for any unknown reason.  Also
some good examples of atmospheric or other impulsive noise, for
testing the noise blanker.

4. I have added a page of "Hints for New Users" to the online WSJT-X
User's Guide,
http://www.physics.princeton.edu/pulsar/K1JT/WSJT-X_Users_Guide.pdf .
Please read it! ... and let me know if you find other operational
details of WSJT-X that need explanation.  This will likely be
especially true for those not already familiar with older versions of
WSJT.

5. An operational suggestion: In many ways the different JT9 submodes
are treated as distinct modes.  If you receive a JT9-x signal in a
different submode than the one you have selected, you won't decode
it. For this reason, if JT9 is to become popular we'll probably need
to choose one or two of the submodes for general use, and perhaps
assign a narrow slice of the band to each one.  Note that "message
averaging" in the Rx software can make two or three JT9-2
transmissions as good as one JT9-5 transmission, with the advantage
that you will copy sooner if signals are better than required for
JT9-5.  Message averaging is not yet present in the JT9 decoder... but
in future it can be.  Again, we have dealt with such issues very
effectively on EME -- and can do so at MF/LF, for sure.

6. On the topic of CW, Beacons, WSPR, JT9, etc.  I really don't
understand what all the fuss is about.  Surely there is room for
everybody?  Maybe I'm just too new here to understand?  (Mal, is this
mostly just a matter of "Mal being Mal"???)

On the HF bands, the WSPR sub-band is just 200 Hz wide.  If we did the
same on 630 m, the WSPR sub-band would take up less than 3% of the 7
kHz band.  If that's too much, we could cut it in half, or even less,
and still have enough WSPR space.  Moreover, a "slow WSPR", if
warranted, would require even less bandwidth.  Similar comments apply
to JT9.  The bandwidth of JT9 signals is significantly less than that
of CW, for comparable information rates.  There should be enough
spectrum for both, even in our narrow MF and LF bands.

7. As for performance comparisons between JT9 and WSPR: WSPR is a
mature program, and its decoder has been optimized and tweaked over a
period approaching five years.  You are playing with JT9 in infancy.
With help (as opposed to simple complaints) from users, it will
improve rapidly.

October 29, 2012: v0.2, r2702
-----------------------------
Changes since version 0.1, r2696 include the following:

1. Sample rate for audio output has been changed from 12000 to 48000
Hz.  Tx audio may now be generated at any frequency from 500 to 20000
Hz.

2. The Decoder now tries to decode all synchronizable signals in the
"green zone", that is, within "Tol" Hz of the selected QSO
frequency. (Before, by default it decoded only the signal producing
the highest "sync" value.  Other signals could be decoded by manually
setting the QSO frequency and reducing Tol as needed.)

3. The user's selected QSO Frequency is now saved and restored on
program restart.

4. The problem with re-initialization after changing sub-modes has
been fixed.

5. The problem (for some users) of not releasing PTT after end of a
transmission has been fixed.

6. The program now writes a log of all decodes to a file wsjtx_rx.log
in the wsjtx directory.


October 25, 2012: v0.1, r2695
-----------------------------
Initial version of WSJT-X (experimental WSJT) released for testing.
