diff --git a/CMakeLists.txt b/CMakeLists.txt index 39431073e..efba4261f 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -54,31 +54,71 @@ set (PROJECT_MANUAL wsjtx-main) set (PROJECT_MANUAL_DIRECTORY_URL http://www.physics.princeton.edu/pulsar/K1JT/wsjtx-doc/) set (PROJECT_SAMPLES_URL http://downloads.sourceforge.net/project/wsjt/) set (PROJECT_SAMPLES_UPLOAD_DEST frs.sourceforge.net:/home/frs/project/wsjt/) -set (PROJECT_SUMMARY_DESCRIPTION "${PROJECT_NAME} - JT9 and JT65 Modes for LF, MF and HF Amateur Radio.") +set (PROJECT_SUMMARY_DESCRIPTION "${PROJECT_NAME} - Digital Modes for Weak Signal Communicaitons in Amateur Radio.") set (PROJECT_DESCRIPTION "${PROJECT_SUMMARY_DESCRIPTION} - ${PROJECT_NAME} implements JT9, a new mode designed especially for the LF, MF, - and HF bands, as well as the popular mode JT65. Both modes were - designed for making reliable, confirmed QSOs under extreme - weak-signal conditions. They use nearly identical message structure - and source encoding. JT65 was designed for EME (“moonbounce”) on the - VHF/UHF bands and has also proved very effective for worldwide QRP - communication at HF; in contrast, JT9 is optimized for HF and lower - frequencies. JT9 is about 2 dB more sensitive than JT65A while using - less than 10% of the bandwidth. World-wide QSOs are possible with - power levels of a few watts and compromise antennas. A 2 kHz slice - of spectrum is essentially full when occupied by ten JT65 signals. - As many as 100 JT9 signals can fit into the same space, without - overlap. + ${PROJECT_NAME} is a computer program designed to facilitate basic amateur + radio communication using very weak signals. The first four letters in + the program name stand for `(W)eak (S)ignal communication by + K1(JT),` while the suffix `-X` indicates that ${PROJECT_NAME} started as + an extended and experimental branch of the program + WSJT. . - ${PROJECT_NAME} offers a “bi-lingual“ operating mode in which you can transmit - and receive JT65 and JT9 signals, switching between modes - automatically as needed. Displayed bandwidth can be as large as 5 - kHz. If your receiver has as upper-sideband filter at least 4 kHz - wide, you can have all the typical JT65 and JT9 activity on screen at - once, available for making QSOs with a click of the mouse. Even with - standard SSB-width IF filters, switching between JT65 and JT9 modes - is quick and convenient. Be sure to read the online ${PROJECT_NAME} User's - Guide.") + ${PROJECT_NAME} Version 1.8 offers nine different protocols or modes: FT8, + JT4, JT9, JT65, QRA64, ISCAT, MSK144, WSPR, and Echo. + The first five are designed for making reliable QSOs under extreme + weak-signal conditions. They use nearly identical message structure + and source encoding. JT65 and QRA64 were designed for EME + (`moonbounce`) on the VHF/UHF bands and have also proven very + effective for worldwide QRP communication on the HF bands. QRA64 has + a number of advantages over JT65, including better performance on the + very weakest signals. We imagine that over time it may replace JT65 + for EME use. JT9 was originally designed for the LF, MF, and lower HF + bands. Its submode JT9A is 2 dB more sensitive than JT65 while using + less than 10% of the bandwidth. JT4 offers a wide variety of tone + spacings and has proven highly effective for EME on microwave bands up + to 24 GHz. These four `slow` modes use one-minute timed sequences + of alternating transmission and reception, so a minimal QSO takes four + to six minutes — two or three transmissions by each station, one + sending in odd UTC minutes and the other even. FT8 is operationally + similar but four times faster (15-second T/R sequences) and less + sensitive by a few dB. On the HF bands, world-wide QSOs are possible + with any of these modes using power levels of a few watts (or even + milliwatts) and compromise antennas. On VHF bands and higher, QSOs + are possible (by EME and other propagation types) at signal levels 10 + to 15 dB below those required for CW. + . + ISCAT, MSK144, and optionally submodes JT9E-H are `fast` + protocols designed to take advantage of brief signal enhancements from + ionized meteor trails, aircraft scatter, and other types of scatter + propagation. These modes use timed sequences of 5, 10, 15, or 30 s + duration. User messages are transmitted repeatedly at high rate (up + to 250 characters per second, for MSK144) to make good use of the + shortest meteor-trail reflections or `pings`. ISCAT uses free-form + messages up to 28 characters long, while MSK144 uses the same + structured messages as the slow modes and optionally an abbreviated + format with hashed callsigns. + . + WSPR (pronounced `whisper`) stands for (W)eak (S)ignal + (P)ropagation (R)eporter. The WSPR protocol was designed for probing + potential propagation paths using low-power transmissions. WSPR + messages normally carry the transmitting station’s callsign, grid + locator, and transmitter power in dBm, and they can be decoded at + signal-to-noise ratios as low as -28 dB in a 2500 Hz bandwidth. WSPR + users with internet access can automatically upload reception + reports to a central database called wsprnet that provides a mapping + facility, archival storage, and many other features. + . + Echo mode allows you to detect and measure your own station's echoes + from the moon, even if they are far below the audible threshold. + . + ${PROJECT_NAME} provides spectral displays for receiver passbands as wide as + 5 kHz, flexible rig control for nearly all modern radios used by + amateurs, and a wide variety of special aids such as automatic Doppler + tracking for EME QSOs and Echo testing. The program runs equally well + on Windows, Macintosh, and Linux systems, and installation packages + are available for all three platforms. + . + Be sure to read the online ${PROJECT_NAME} User's Guide.") set (CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/CMake/Modules ${CMAKE_MODULE_PATH})