Changes in WSPR 2.00 (r1714)    Nov 19, 2009
--------------------------------------------
This release is a major upgrade.  New features include:

1.  Comprehensive WSPR 2.0 User's Guide
2.  Distribution binaries for Debian-based Linux as well
    as Windows
3.  User-friendly setup screen with drop-down selection 
    of audio devices and CAT parameters
4.  Support for compound callsigns and 6-digit locators
5.  Fine adjustment of fractional time for transmitting
6.  Tune button
7.  Band settings for 600m and 60m
8.  Direct on-line access to the WSPR 2.0 User's guide,
    WSPRnet, and the WSJT Home Page
9.  Optional CW identification
10. Optional nonstandard Rx BFO setting
11. Tools for frequency calibration and automated
    frequency corrections
12. Program structure includes mutex locks for better
    multi-threading control

Changes in WSPR 1.12 (r1177)    Apr 27, 2009
--------------------------------------------
Minor maintenance release implementing several new features:

1. Live readout of Rx noise level in status bar.
2. Annoying popup messages when editing frequency settings have
   been fixed.
3. Frequency settings for band "Other" are saved and restored
   on program restart.
4. Basic operating instructions in Help screen are updated.


Changes in WSPR 1.10 (r1042)   Nov. 10, 2008
--------------------------------------------

Added a Band menu"; frequencies f0 and ftx now saved separately
for each band.  Added red tick-mark on waterfall scale to indicate
Tx frequency.  Allow 10% Tx duty cycle.

Changes in WSPR 1.01 (r1023)  Sept. 17, 2008
--------------------------------------------
Allow Windows COM port numbers above 9.


Changes in WSPR 1.0 (r987)  July 28, 2008
-----------------------------------------

Corrected the handling of WSPR QSO-mode messages when uploading
data to the WSPRnet server.

Changes in WSPR 1.0 (r972)  July 16, 2008
-----------------------------------------

The main change is that decoding of messages for the new WSPR QSO mode
has been implemented.  (To make WSPR mode QSOs you must use WSJT 
version 7.)

In addition, several minor bugs and program inconsistencies have been
corrected.


Changes in WSPR 0.7 (r752)   April 28, 2008
-------------------------------------------

1. Decoder performs better and is 2.5 times faster than the decoder
   in v0.6.  The incidence of false decodes is much lower.  In a 
   test run processing 145 saved files (recorded on the 30 m band),
   a direct comparison of v0.6 and v0.7 gave the following results:

      ====================================
      Vers Correct  False   Unique   Avg
           Decodes Decodes Messages  Time
                                     (s)
      ====================================
      v0.6   332      3       33     5.0
      v0.7   348      0       35     2.0
      ------------------------------------

2. Spectral width of received signal (after removing the 4-FSK tone
   steps) is measured and reported.

3. Time-stamp on received spots has been corrected.

4. Audio buffer size was increased and thread priorities adjusted
   for better performance.

5. Lower case is again permitted in callsign and grid locator

6. A bug in setting, saving, and restoring frequencies has been fixed.

7. A bug that prevented using non-default audio devices has been fixed. 


Changes in WSPR 0.6 (r718)   April 14, 2008
-------------------------------------------

1.  Improved decoding, especially of drifting signals.  The measured
    frequency drift of each signal is now displayed along with other
    decoding information.

2.  Optional automatic uploading of spots to WSPRnet.org.

3.  Color-coded "aging" of callsigns in bandmap.

4.  Improved dynamic range and close-in selectivity.

5.  New randomizing algorithm: will not transmit twice in a row.
    Number of Rx periods will average to the value required by 
    selected Tx percentage, but will vary randomly about that number
    by +/- 1.

6.  Vertical green line added to waterfall after each Tx interval.

7.  "Save" and "Open" functions are now fully functional.  You can
    save wave files for subsequent playback and analysis.

8.  Hotkeys are provided for frequently-used menu functions.

9.  Default font size for decoded text window has been increased from
    9pt to 10pt.  Among other things, this makes it possible to easily
    distinguish between "O" (capital "o") and "0" ("zero").

10. Frequency readout of cursor position on the waterfall is provided.

11. Double-click on waterfall sets Tx frequency.

The following changes are of interest primarily to programmers and
others interested in the structure and operation of WSPR.

12. Version 0.5 used separate processes for GUI, Receive-and-Decode,
    and Transmit.  Version 0.6 uses a single process that initiates
    separate threads for GUI, Executive control, Receive, Decode, and
    Transmit.

13. WSPR can now be compiled for Windows, as well as Linux, using
    only free, open-source compiler tools.

14. WSPR is more "crash proof" against user mistakes and invalid input
    paremeters.

15. Error messages caused by various fault conditions are more
    user-friendly.